summaryrefslogtreecommitdiff
path: root/axTLS/src/ssl
diff options
context:
space:
mode:
Diffstat (limited to 'axTLS/src/ssl')
-rw-r--r--axTLS/src/ssl/asn1.c565
-rw-r--r--axTLS/src/ssl/cert.h43
-rw-r--r--axTLS/src/ssl/crypto_misc.h173
-rw-r--r--axTLS/src/ssl/gen_cert.c364
-rw-r--r--axTLS/src/ssl/loader.c478
-rw-r--r--axTLS/src/ssl/openssl.c323
-rw-r--r--axTLS/src/ssl/os_port.c158
-rw-r--r--axTLS/src/ssl/os_port.h208
-rw-r--r--axTLS/src/ssl/p12.c483
-rw-r--r--axTLS/src/ssl/private_key.h54
-rw-r--r--axTLS/src/ssl/ssl.h499
-rw-r--r--axTLS/src/ssl/tls1.c2195
-rw-r--r--axTLS/src/ssl/tls1.h295
-rw-r--r--axTLS/src/ssl/tls1_clnt.c395
-rw-r--r--axTLS/src/ssl/tls1_svr.c478
-rw-r--r--axTLS/src/ssl/version.h1
-rw-r--r--axTLS/src/ssl/x509.c564
17 files changed, 7276 insertions, 0 deletions
diff --git a/axTLS/src/ssl/asn1.c b/axTLS/src/ssl/asn1.c
new file mode 100644
index 0000000..cf8d5be
--- /dev/null
+++ b/axTLS/src/ssl/asn1.c
@@ -0,0 +1,565 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Some primitive asn methods for extraction ASN.1 data.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "os_port.h"
+#include "crypto.h"
+#include "crypto_misc.h"
+
+#define SIG_OID_PREFIX_SIZE 8
+#define SIG_IIS6_OID_SIZE 5
+#define SIG_SUBJECT_ALT_NAME_SIZE 3
+
+/* Must be an RSA algorithm with either SHA1 or MD5 for verifying to work */
+static const uint8_t sig_oid_prefix[SIG_OID_PREFIX_SIZE] =
+{
+ 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01
+};
+
+static const uint8_t sig_sha1WithRSAEncrypt[SIG_IIS6_OID_SIZE] =
+{
+ 0x2b, 0x0e, 0x03, 0x02, 0x1d
+};
+
+static const uint8_t sig_subject_alt_name[SIG_SUBJECT_ALT_NAME_SIZE] =
+{
+ 0x55, 0x1d, 0x11
+};
+
+/* CN, O, OU */
+static const uint8_t g_dn_types[] = { 3, 10, 11 };
+
+int get_asn1_length(const uint8_t *buf, int *offset)
+{
+ int len, i;
+
+ if (!(buf[*offset] & 0x80)) /* short form */
+ {
+ len = buf[(*offset)++];
+ }
+ else /* long form */
+ {
+ int length_bytes = buf[(*offset)++]&0x7f;
+ len = 0;
+ for (i = 0; i < length_bytes; i++)
+ {
+ len <<= 8;
+ len += buf[(*offset)++];
+ }
+ }
+
+ return len;
+}
+
+/**
+ * Skip the ASN1.1 object type and its length. Get ready to read the object's
+ * data.
+ */
+int asn1_next_obj(const uint8_t *buf, int *offset, int obj_type)
+{
+ if (buf[*offset] != obj_type)
+ return X509_NOT_OK;
+ (*offset)++;
+ return get_asn1_length(buf, offset);
+}
+
+/**
+ * Skip over an ASN.1 object type completely. Get ready to read the next
+ * object.
+ */
+int asn1_skip_obj(const uint8_t *buf, int *offset, int obj_type)
+{
+ int len;
+
+ if (buf[*offset] != obj_type)
+ return X509_NOT_OK;
+ (*offset)++;
+ len = get_asn1_length(buf, offset);
+ *offset += len;
+ return 0;
+}
+
+/**
+ * Read an integer value for ASN.1 data
+ * Note: This function allocates memory which must be freed by the user.
+ */
+int asn1_get_int(const uint8_t *buf, int *offset, uint8_t **object)
+{
+ int len;
+
+ if ((len = asn1_next_obj(buf, offset, ASN1_INTEGER)) < 0)
+ goto end_int_array;
+
+ if (len > 1 && buf[*offset] == 0x00) /* ignore the negative byte */
+ {
+ len--;
+ (*offset)++;
+ }
+
+ *object = (uint8_t *)malloc(len);
+ memcpy(*object, &buf[*offset], len);
+ *offset += len;
+
+end_int_array:
+ return len;
+}
+
+/**
+ * Get all the RSA private key specifics from an ASN.1 encoded file
+ */
+int asn1_get_private_key(const uint8_t *buf, int len, RSA_CTX **rsa_ctx)
+{
+ int offset = 7;
+ uint8_t *modulus = NULL, *priv_exp = NULL, *pub_exp = NULL;
+ int mod_len, priv_len, pub_len;
+#ifdef CONFIG_BIGINT_CRT
+ uint8_t *p = NULL, *q = NULL, *dP = NULL, *dQ = NULL, *qInv = NULL;
+ int p_len, q_len, dP_len, dQ_len, qInv_len;
+#endif
+
+ /* not in der format */
+ if (buf[0] != ASN1_SEQUENCE) /* basic sanity check */
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: This is not a valid ASN.1 file\n");
+#endif
+ return X509_INVALID_PRIV_KEY;
+ }
+
+ /* initialise the RNG */
+ RNG_initialize(buf, len);
+
+ mod_len = asn1_get_int(buf, &offset, &modulus);
+ pub_len = asn1_get_int(buf, &offset, &pub_exp);
+ priv_len = asn1_get_int(buf, &offset, &priv_exp);
+
+ if (mod_len <= 0 || pub_len <= 0 || priv_len <= 0)
+ return X509_INVALID_PRIV_KEY;
+
+#ifdef CONFIG_BIGINT_CRT
+ p_len = asn1_get_int(buf, &offset, &p);
+ q_len = asn1_get_int(buf, &offset, &q);
+ dP_len = asn1_get_int(buf, &offset, &dP);
+ dQ_len = asn1_get_int(buf, &offset, &dQ);
+ qInv_len = asn1_get_int(buf, &offset, &qInv);
+
+ if (p_len <= 0 || q_len <= 0 || dP_len <= 0 || dQ_len <= 0 || qInv_len <= 0)
+ return X509_INVALID_PRIV_KEY;
+
+ RSA_priv_key_new(rsa_ctx,
+ modulus, mod_len, pub_exp, pub_len, priv_exp, priv_len,
+ p, p_len, q, p_len, dP, dP_len, dQ, dQ_len, qInv, qInv_len);
+
+ free(p);
+ free(q);
+ free(dP);
+ free(dQ);
+ free(qInv);
+#else
+ RSA_priv_key_new(rsa_ctx,
+ modulus, mod_len, pub_exp, pub_len, priv_exp, priv_len);
+#endif
+
+ free(modulus);
+ free(priv_exp);
+ free(pub_exp);
+ return X509_OK;
+}
+
+/**
+ * Get the time of a certificate. Ignore hours/minutes/seconds.
+ */
+static int asn1_get_utc_time(const uint8_t *buf, int *offset, time_t *t)
+{
+ int ret = X509_NOT_OK, len, t_offset;
+ struct tm tm;
+
+ if (buf[(*offset)++] != ASN1_UTC_TIME)
+ goto end_utc_time;
+
+ len = get_asn1_length(buf, offset);
+ t_offset = *offset;
+
+ memset(&tm, 0, sizeof(struct tm));
+ tm.tm_year = (buf[t_offset] - '0')*10 + (buf[t_offset+1] - '0');
+
+ if (tm.tm_year <= 50) /* 1951-2050 thing */
+ {
+ tm.tm_year += 100;
+ }
+
+ tm.tm_mon = (buf[t_offset+2] - '0')*10 + (buf[t_offset+3] - '0') - 1;
+ tm.tm_mday = (buf[t_offset+4] - '0')*10 + (buf[t_offset+5] - '0');
+ *t = mktime(&tm);
+ *offset += len;
+ ret = X509_OK;
+
+end_utc_time:
+ return ret;
+}
+
+/**
+ * Get the version type of a certificate (which we don't actually care about)
+ */
+int asn1_version(const uint8_t *cert, int *offset, X509_CTX *x509_ctx)
+{
+ int ret = X509_NOT_OK;
+
+ (*offset) += 2; /* get past explicit tag */
+ if (asn1_skip_obj(cert, offset, ASN1_INTEGER))
+ goto end_version;
+
+ ret = X509_OK;
+end_version:
+ return ret;
+}
+
+/**
+ * Retrieve the notbefore and notafter certificate times.
+ */
+int asn1_validity(const uint8_t *cert, int *offset, X509_CTX *x509_ctx)
+{
+ return (asn1_next_obj(cert, offset, ASN1_SEQUENCE) < 0 ||
+ asn1_get_utc_time(cert, offset, &x509_ctx->not_before) ||
+ asn1_get_utc_time(cert, offset, &x509_ctx->not_after));
+}
+
+/**
+ * Get the components of a distinguished name
+ */
+static int asn1_get_oid_x520(const uint8_t *buf, int *offset)
+{
+ int dn_type = 0;
+ int len;
+
+ if ((len = asn1_next_obj(buf, offset, ASN1_OID)) < 0)
+ goto end_oid;
+
+ /* expect a sequence of 2.5.4.[x] where x is a one of distinguished name
+ components we are interested in. */
+ if (len == 3 && buf[(*offset)++] == 0x55 && buf[(*offset)++] == 0x04)
+ dn_type = buf[(*offset)++];
+ else
+ {
+ *offset += len; /* skip over it */
+ }
+
+end_oid:
+ return dn_type;
+}
+
+/**
+ * Obtain an ASN.1 printable string type.
+ */
+static int asn1_get_printable_str(const uint8_t *buf, int *offset, char **str)
+{
+ int len = X509_NOT_OK;
+
+ /* some certs have this awful crud in them for some reason */
+ if (buf[*offset] != ASN1_PRINTABLE_STR &&
+ buf[*offset] != ASN1_PRINTABLE_STR2 &&
+ buf[*offset] != ASN1_TELETEX_STR &&
+ buf[*offset] != ASN1_IA5_STR &&
+ buf[*offset] != ASN1_UNICODE_STR)
+ goto end_pnt_str;
+
+ (*offset)++;
+ len = get_asn1_length(buf, offset);
+
+ if (buf[*offset - 1] == ASN1_UNICODE_STR)
+ {
+ int i;
+ *str = (char *)malloc(len/2+1); /* allow for null */
+
+ for (i = 0; i < len; i += 2)
+ (*str)[i/2] = buf[*offset + i + 1];
+
+ (*str)[len/2] = 0; /* null terminate */
+ }
+ else
+ {
+ *str = (char *)malloc(len+1); /* allow for null */
+ memcpy(*str, &buf[*offset], len);
+ (*str)[len] = 0; /* null terminate */
+ }
+
+ *offset += len;
+
+end_pnt_str:
+ return len;
+}
+
+/**
+ * Get the subject name (or the issuer) of a certificate.
+ */
+int asn1_name(const uint8_t *cert, int *offset, char *dn[])
+{
+ int ret = X509_NOT_OK;
+ int dn_type;
+ char *tmp;
+
+ if (asn1_next_obj(cert, offset, ASN1_SEQUENCE) < 0)
+ goto end_name;
+
+ while (asn1_next_obj(cert, offset, ASN1_SET) >= 0)
+ {
+ int i, found = 0;
+
+ if (asn1_next_obj(cert, offset, ASN1_SEQUENCE) < 0 ||
+ (dn_type = asn1_get_oid_x520(cert, offset)) < 0)
+ goto end_name;
+
+ tmp = NULL;
+
+ if (asn1_get_printable_str(cert, offset, &tmp) < 0)
+ {
+ free(tmp);
+ goto end_name;
+ }
+
+ /* find the distinguished named type */
+ for (i = 0; i < X509_NUM_DN_TYPES; i++)
+ {
+ if (dn_type == g_dn_types[i])
+ {
+ if (dn[i] == NULL)
+ {
+ dn[i] = tmp;
+ found = 1;
+ break;
+ }
+ }
+ }
+
+ if (found == 0) /* not found so get rid of it */
+ {
+ free(tmp);
+ }
+ }
+
+ ret = X509_OK;
+end_name:
+ return ret;
+}
+
+/**
+ * Read the modulus and public exponent of a certificate.
+ */
+int asn1_public_key(const uint8_t *cert, int *offset, X509_CTX *x509_ctx)
+{
+ int ret = X509_NOT_OK, mod_len, pub_len;
+ uint8_t *modulus = NULL, *pub_exp = NULL;
+
+ if (asn1_next_obj(cert, offset, ASN1_SEQUENCE) < 0 ||
+ asn1_skip_obj(cert, offset, ASN1_SEQUENCE) ||
+ asn1_next_obj(cert, offset, ASN1_BIT_STRING) < 0)
+ goto end_pub_key;
+
+ (*offset)++; /* ignore the padding bit field */
+
+ if (asn1_next_obj(cert, offset, ASN1_SEQUENCE) < 0)
+ goto end_pub_key;
+
+ mod_len = asn1_get_int(cert, offset, &modulus);
+ pub_len = asn1_get_int(cert, offset, &pub_exp);
+
+ RSA_pub_key_new(&x509_ctx->rsa_ctx, modulus, mod_len, pub_exp, pub_len);
+
+ free(modulus);
+ free(pub_exp);
+ ret = X509_OK;
+
+end_pub_key:
+ return ret;
+}
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+/**
+ * Read the signature of the certificate.
+ */
+int asn1_signature(const uint8_t *cert, int *offset, X509_CTX *x509_ctx)
+{
+ int ret = X509_NOT_OK;
+
+ if (cert[(*offset)++] != ASN1_BIT_STRING)
+ goto end_sig;
+
+ x509_ctx->sig_len = get_asn1_length(cert, offset)-1;
+ (*offset)++; /* ignore bit string padding bits */
+ x509_ctx->signature = (uint8_t *)malloc(x509_ctx->sig_len);
+ memcpy(x509_ctx->signature, &cert[*offset], x509_ctx->sig_len);
+ *offset += x509_ctx->sig_len;
+ ret = X509_OK;
+
+end_sig:
+ return ret;
+}
+
+/*
+ * Compare 2 distinguished name components for equality
+ * @return 0 if a match
+ */
+static int asn1_compare_dn_comp(const char *dn1, const char *dn2)
+{
+ int ret;
+
+ if (dn1 == NULL && dn2 == NULL)
+ ret = 0;
+ else
+ ret = (dn1 && dn2) ? strcmp(dn1, dn2) : 1;
+
+ return ret;
+}
+
+/**
+ * Clean up all of the CA certificates.
+ */
+void remove_ca_certs(CA_CERT_CTX *ca_cert_ctx)
+{
+ int i = 0;
+
+ if (ca_cert_ctx == NULL)
+ return;
+
+ while (i < CONFIG_X509_MAX_CA_CERTS && ca_cert_ctx->cert[i])
+ {
+ x509_free(ca_cert_ctx->cert[i]);
+ ca_cert_ctx->cert[i++] = NULL;
+ }
+
+ free(ca_cert_ctx);
+}
+
+/*
+ * Compare 2 distinguished names for equality
+ * @return 0 if a match
+ */
+int asn1_compare_dn(char * const dn1[], char * const dn2[])
+{
+ int i;
+
+ for (i = 0; i < X509_NUM_DN_TYPES; i++)
+ {
+ if (asn1_compare_dn_comp(dn1[i], dn2[i]))
+ return 1;
+ }
+
+ return 0; /* all good */
+}
+
+int asn1_find_oid(const uint8_t* cert, int* offset,
+ const uint8_t* oid, int oid_length)
+{
+ int seqlen;
+ if ((seqlen = asn1_next_obj(cert, offset, ASN1_SEQUENCE))> 0)
+ {
+ int end = *offset + seqlen;
+
+ while (*offset < end)
+ {
+ int type = cert[(*offset)++];
+ int length = get_asn1_length(cert, offset);
+ int noffset = *offset + length;
+
+ if (type == ASN1_SEQUENCE)
+ {
+ type = cert[(*offset)++];
+ length = get_asn1_length(cert, offset);
+
+ if (type == ASN1_OID && length == oid_length &&
+ memcmp(cert + *offset, oid, oid_length) == 0)
+ {
+ *offset += oid_length;
+ return 1;
+ }
+ }
+
+ *offset = noffset;
+ }
+ }
+
+ return 0;
+}
+
+int asn1_find_subjectaltname(const uint8_t* cert, int offset)
+{
+ if (asn1_find_oid(cert, &offset, sig_subject_alt_name,
+ SIG_SUBJECT_ALT_NAME_SIZE))
+ {
+ return offset;
+ }
+
+ return 0;
+}
+
+#endif /* CONFIG_SSL_CERT_VERIFICATION */
+
+/**
+ * Read the signature type of the certificate. We only support RSA-MD5 and
+ * RSA-SHA1 signature types.
+ */
+int asn1_signature_type(const uint8_t *cert,
+ int *offset, X509_CTX *x509_ctx)
+{
+ int ret = X509_NOT_OK, len;
+
+ if (cert[(*offset)++] != ASN1_OID)
+ goto end_check_sig;
+
+ len = get_asn1_length(cert, offset);
+
+ if (len == 5 && memcmp(sig_sha1WithRSAEncrypt, &cert[*offset],
+ SIG_IIS6_OID_SIZE) == 0)
+ {
+ x509_ctx->sig_type = SIG_TYPE_SHA1;
+ }
+ else
+ {
+ if (memcmp(sig_oid_prefix, &cert[*offset], SIG_OID_PREFIX_SIZE))
+ goto end_check_sig; /* unrecognised cert type */
+
+ x509_ctx->sig_type = cert[*offset + SIG_OID_PREFIX_SIZE];
+ }
+
+ *offset += len;
+ asn1_skip_obj(cert, offset, ASN1_NULL); /* if it's there */
+ ret = X509_OK;
+
+end_check_sig:
+ return ret;
+}
+
diff --git a/axTLS/src/ssl/cert.h b/axTLS/src/ssl/cert.h
new file mode 100644
index 0000000..30c7b65
--- /dev/null
+++ b/axTLS/src/ssl/cert.h
@@ -0,0 +1,43 @@
+unsigned char default_certificate[] = {
+ 0x30, 0x82, 0x01, 0xd7, 0x30, 0x82, 0x01, 0x40, 0x02, 0x09, 0x00, 0xab,
+ 0x08, 0x18, 0xa7, 0x03, 0x07, 0x27, 0xfd, 0x30, 0x0d, 0x06, 0x09, 0x2a,
+ 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00, 0x30, 0x34,
+ 0x31, 0x32, 0x30, 0x30, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x29, 0x61,
+ 0x78, 0x54, 0x4c, 0x53, 0x20, 0x50, 0x72, 0x6f, 0x6a, 0x65, 0x63, 0x74,
+ 0x20, 0x44, 0x6f, 0x64, 0x67, 0x79, 0x20, 0x43, 0x65, 0x72, 0x74, 0x69,
+ 0x66, 0x69, 0x63, 0x61, 0x74, 0x65, 0x20, 0x41, 0x75, 0x74, 0x68, 0x6f,
+ 0x72, 0x69, 0x74, 0x79, 0x30, 0x1e, 0x17, 0x0d, 0x31, 0x30, 0x31, 0x32,
+ 0x32, 0x36, 0x32, 0x32, 0x33, 0x33, 0x33, 0x39, 0x5a, 0x17, 0x0d, 0x32,
+ 0x34, 0x30, 0x39, 0x30, 0x33, 0x32, 0x32, 0x33, 0x33, 0x33, 0x39, 0x5a,
+ 0x30, 0x2c, 0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13,
+ 0x0d, 0x61, 0x78, 0x54, 0x4c, 0x53, 0x20, 0x50, 0x72, 0x6f, 0x6a, 0x65,
+ 0x63, 0x74, 0x31, 0x12, 0x30, 0x10, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13,
+ 0x09, 0x31, 0x32, 0x37, 0x2e, 0x30, 0x2e, 0x30, 0x2e, 0x31, 0x30, 0x81,
+ 0x9f, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
+ 0x01, 0x01, 0x05, 0x00, 0x03, 0x81, 0x8d, 0x00, 0x30, 0x81, 0x89, 0x02,
+ 0x81, 0x81, 0x00, 0xcd, 0xfd, 0x89, 0x48, 0xbe, 0x36, 0xb9, 0x95, 0x76,
+ 0xd4, 0x13, 0x30, 0x0e, 0xbf, 0xb2, 0xed, 0x67, 0x0a, 0xc0, 0x16, 0x3f,
+ 0x51, 0x09, 0x9d, 0x29, 0x2f, 0xb2, 0x6d, 0x3f, 0x3e, 0x6c, 0x2f, 0x90,
+ 0x80, 0xa1, 0x71, 0xdf, 0xbe, 0x38, 0xc5, 0xcb, 0xa9, 0x9a, 0x40, 0x14,
+ 0x90, 0x0a, 0xf9, 0xb7, 0x07, 0x0b, 0xe1, 0xda, 0xe7, 0x09, 0xbf, 0x0d,
+ 0x57, 0x41, 0x86, 0x60, 0xa1, 0xc1, 0x27, 0x91, 0x5b, 0x0a, 0x98, 0x46,
+ 0x1b, 0xf6, 0xa2, 0x84, 0xf8, 0x65, 0xc7, 0xce, 0x2d, 0x96, 0x17, 0xaa,
+ 0x91, 0xf8, 0x61, 0x04, 0x50, 0x70, 0xeb, 0xb4, 0x43, 0xb7, 0xdc, 0x9a,
+ 0xcc, 0x31, 0x01, 0x14, 0xd4, 0xcd, 0xcc, 0xc2, 0x37, 0x6d, 0x69, 0x82,
+ 0xd6, 0xc6, 0xc4, 0xbe, 0xf2, 0x34, 0xa5, 0xc9, 0xa6, 0x19, 0x53, 0x32,
+ 0x7a, 0x86, 0x0e, 0x91, 0x82, 0x0f, 0xa1, 0x42, 0x54, 0xaa, 0x01, 0x02,
+ 0x03, 0x01, 0x00, 0x01, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
+ 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00, 0x03, 0x81, 0x81, 0x00, 0x40,
+ 0xb4, 0x94, 0x9a, 0xa8, 0x89, 0x72, 0x1d, 0x07, 0xe5, 0xb3, 0x6b, 0x88,
+ 0x21, 0xc2, 0x38, 0x36, 0x9e, 0x7a, 0x8c, 0x49, 0x48, 0x68, 0x0c, 0x06,
+ 0xe8, 0xdb, 0x1f, 0x4e, 0x05, 0xe6, 0x31, 0xe3, 0xfd, 0xe6, 0x0d, 0x6b,
+ 0xd8, 0x13, 0x17, 0xe0, 0x2d, 0x0d, 0xb8, 0x7e, 0xcb, 0x20, 0x6c, 0xa8,
+ 0x73, 0xa7, 0xfd, 0xe3, 0xa7, 0xfa, 0xf3, 0x02, 0x60, 0x78, 0x1f, 0x13,
+ 0x40, 0x45, 0xee, 0x75, 0xf5, 0x10, 0xfd, 0x8f, 0x68, 0x74, 0xd4, 0xac,
+ 0xae, 0x04, 0x09, 0x55, 0x2c, 0xdb, 0xd8, 0x07, 0x07, 0x65, 0x69, 0x27,
+ 0x6e, 0xbf, 0x5e, 0x61, 0x40, 0x56, 0x8b, 0xd7, 0x33, 0x3b, 0xff, 0x6e,
+ 0x53, 0x7e, 0x9d, 0x3f, 0xc0, 0x40, 0x3a, 0xab, 0xa0, 0x50, 0x4e, 0x80,
+ 0x47, 0x46, 0x0d, 0x1e, 0xdb, 0x4c, 0xf1, 0x1b, 0x5d, 0x3c, 0x2a, 0x54,
+ 0xa7, 0x4d, 0xfa, 0x7b, 0x72, 0x66, 0xc5
+};
+unsigned int default_certificate_len = 475;
diff --git a/axTLS/src/ssl/crypto_misc.h b/axTLS/src/ssl/crypto_misc.h
new file mode 100644
index 0000000..9c9e2aa
--- /dev/null
+++ b/axTLS/src/ssl/crypto_misc.h
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/**
+ * @file crypto_misc.h
+ */
+
+#ifndef HEADER_CRYPTO_MISC_H
+#define HEADER_CRYPTO_MISC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "crypto.h"
+#include "bigint.h"
+
+/**************************************************************************
+ * X509 declarations
+ **************************************************************************/
+#define X509_OK 0
+#define X509_NOT_OK -1
+#define X509_VFY_ERROR_NO_TRUSTED_CERT -2
+#define X509_VFY_ERROR_BAD_SIGNATURE -3
+#define X509_VFY_ERROR_NOT_YET_VALID -4
+#define X509_VFY_ERROR_EXPIRED -5
+#define X509_VFY_ERROR_SELF_SIGNED -6
+#define X509_VFY_ERROR_INVALID_CHAIN -7
+#define X509_VFY_ERROR_UNSUPPORTED_DIGEST -8
+#define X509_INVALID_PRIV_KEY -9
+
+/*
+ * The Distinguished Name
+ */
+#define X509_NUM_DN_TYPES 3
+#define X509_COMMON_NAME 0
+#define X509_ORGANIZATION 1
+#define X509_ORGANIZATIONAL_UNIT 2
+
+struct _x509_ctx
+{
+ char *ca_cert_dn[X509_NUM_DN_TYPES];
+ char *cert_dn[X509_NUM_DN_TYPES];
+ char **subject_alt_dnsnames;
+ time_t not_before;
+ time_t not_after;
+ uint8_t *signature;
+ uint16_t sig_len;
+ uint8_t sig_type;
+ RSA_CTX *rsa_ctx;
+ bigint *digest;
+ uint8_t sha1_fingerprint[SHA1_SIZE];
+ struct _x509_ctx *next;
+};
+
+typedef struct _x509_ctx X509_CTX;
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+typedef struct
+{
+ X509_CTX *cert[CONFIG_X509_MAX_CA_CERTS];
+} CA_CERT_CTX;
+#endif
+
+int x509_new(const uint8_t *cert, int *len, X509_CTX **ctx);
+void x509_free(X509_CTX *x509_ctx);
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+int x509_verify(const CA_CERT_CTX *ca_cert_ctx, const X509_CTX *cert);
+#endif
+#ifdef CONFIG_SSL_FULL_MODE
+void x509_print(const X509_CTX *cert, CA_CERT_CTX *ca_cert_ctx);
+const char * x509_display_error(int error);
+#endif
+
+/**************************************************************************
+ * ASN1 declarations
+ **************************************************************************/
+#define ASN1_INTEGER 0x02
+#define ASN1_BIT_STRING 0x03
+#define ASN1_OCTET_STRING 0x04
+#define ASN1_NULL 0x05
+#define ASN1_PRINTABLE_STR2 0x0C
+#define ASN1_OID 0x06
+#define ASN1_PRINTABLE_STR2 0x0C
+#define ASN1_PRINTABLE_STR 0x13
+#define ASN1_TELETEX_STR 0x14
+#define ASN1_IA5_STR 0x16
+#define ASN1_UTC_TIME 0x17
+#define ASN1_UNICODE_STR 0x1e
+#define ASN1_SEQUENCE 0x30
+#define ASN1_CONTEXT_DNSNAME 0x82
+#define ASN1_SET 0x31
+#define ASN1_V3_DATA 0xa3
+#define ASN1_IMPLICIT_TAG 0x80
+#define ASN1_CONTEXT_DNSNAME 0x82
+#define ASN1_EXPLICIT_TAG 0xa0
+#define ASN1_V3_DATA 0xa3
+
+#define SIG_TYPE_MD2 0x02
+#define SIG_TYPE_MD5 0x04
+#define SIG_TYPE_SHA1 0x05
+
+int get_asn1_length(const uint8_t *buf, int *offset);
+int asn1_get_private_key(const uint8_t *buf, int len, RSA_CTX **rsa_ctx);
+int asn1_next_obj(const uint8_t *buf, int *offset, int obj_type);
+int asn1_skip_obj(const uint8_t *buf, int *offset, int obj_type);
+int asn1_get_int(const uint8_t *buf, int *offset, uint8_t **object);
+int asn1_version(const uint8_t *cert, int *offset, X509_CTX *x509_ctx);
+int asn1_validity(const uint8_t *cert, int *offset, X509_CTX *x509_ctx);
+int asn1_name(const uint8_t *cert, int *offset, char *dn[]);
+int asn1_public_key(const uint8_t *cert, int *offset, X509_CTX *x509_ctx);
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+int asn1_signature(const uint8_t *cert, int *offset, X509_CTX *x509_ctx);
+int asn1_find_subjectaltname(const uint8_t* cert, int offset);
+int asn1_compare_dn(char * const dn1[], char * const dn2[]);
+#endif /* CONFIG_SSL_CERT_VERIFICATION */
+int asn1_signature_type(const uint8_t *cert,
+ int *offset, X509_CTX *x509_ctx);
+
+/**************************************************************************
+ * MISC declarations
+ **************************************************************************/
+#define SALT_SIZE 8
+
+extern const char * const unsupported_str;
+
+typedef void (*crypt_func)(void *, const uint8_t *, uint8_t *, int);
+typedef void (*hmac_func)(const uint8_t *msg, int length, const uint8_t *key,
+ int key_len, uint8_t *digest);
+
+int get_file(const char *filename, uint8_t **buf);
+
+#if defined(CONFIG_SSL_FULL_MODE) || defined(WIN32) || defined(CONFIG_DEBUG)
+EXP_FUNC void STDCALL print_blob(const char *format, const uint8_t *data, int size, ...);
+#else
+ #define print_blob(...)
+#endif
+
+EXP_FUNC int STDCALL base64_decode(const char *in, int len,
+ uint8_t *out, int *outlen);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/axTLS/src/ssl/gen_cert.c b/axTLS/src/ssl/gen_cert.c
new file mode 100644
index 0000000..c2fe381
--- /dev/null
+++ b/axTLS/src/ssl/gen_cert.c
@@ -0,0 +1,364 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#ifdef CONFIG_SSL_GENERATE_X509_CERT
+#include <string.h>
+#include <stdlib.h>
+#include "os_port.h"
+#include "ssl.h"
+
+/**
+ * Generate a basic X.509 certificate
+ */
+
+static uint8_t set_gen_length(int len, uint8_t *buf, int *offset)
+{
+ if (len < 0x80) /* short form */
+ {
+ buf[(*offset)++] = len;
+ return 1;
+ }
+ else /* long form */
+ {
+ int i, length_bytes = 0;
+
+ if (len & 0x00FF0000)
+ length_bytes = 3;
+ else if (len & 0x0000FF00)
+ length_bytes = 2;
+ else if (len & 0x000000FF)
+ length_bytes = 1;
+
+ buf[(*offset)++] = 0x80 + length_bytes;
+
+ for (i = length_bytes-1; i >= 0; i--)
+ {
+ buf[*offset+i] = len & 0xFF;
+ len >>= 8;
+ }
+
+ *offset += length_bytes;
+ return length_bytes+1;
+ }
+}
+
+static int pre_adjust_with_size(uint8_t type,
+ int *seq_offset, uint8_t *buf, int *offset)
+{
+ buf[(*offset)++] = type;
+ *seq_offset = *offset;
+ *offset += 4; /* fill in later */
+ return *offset;
+}
+
+static void adjust_with_size(int seq_size, int seq_start,
+ uint8_t *buf, int *offset)
+{
+ uint8_t seq_byte_size;
+ int orig_seq_size = seq_size;
+ int orig_seq_start = seq_start;
+
+ seq_size = *offset-seq_size;
+ seq_byte_size = set_gen_length(seq_size, buf, &seq_start);
+
+ if (seq_byte_size != 4)
+ {
+ memmove(&buf[orig_seq_start+seq_byte_size],
+ &buf[orig_seq_size], seq_size);
+ *offset -= 4-seq_byte_size;
+ }
+}
+
+static void gen_serial_number(uint8_t *buf, int *offset)
+{
+ static const uint8_t ser_oid[] = { ASN1_INTEGER, 1, 0x7F };
+ memcpy(&buf[*offset], ser_oid , sizeof(ser_oid));
+ *offset += sizeof(ser_oid);
+}
+
+static void gen_signature_alg(uint8_t *buf, int *offset)
+{
+ /* OBJECT IDENTIFIER sha1withRSAEncryption (1 2 840 113549 1 1 5) */
+ static const uint8_t sig_oid[] =
+ {
+ ASN1_SEQUENCE, 0x0d, ASN1_OID, 0x09,
+ 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05,
+ ASN1_NULL, 0x00
+ };
+
+ memcpy(&buf[*offset], sig_oid, sizeof(sig_oid));
+ *offset += sizeof(sig_oid);
+}
+
+static int gen_dn(const char *name, uint8_t dn_type,
+ uint8_t *buf, int *offset)
+{
+ int ret = X509_OK;
+ int name_size = strlen(name);
+
+ if (name_size > 0x70) /* just too big */
+ {
+ ret = X509_NOT_OK;
+ goto error;
+ }
+
+ buf[(*offset)++] = ASN1_SET;
+ set_gen_length(9+name_size, buf, offset);
+ buf[(*offset)++] = ASN1_SEQUENCE;
+ set_gen_length(7+name_size, buf, offset);
+ buf[(*offset)++] = ASN1_OID;
+ buf[(*offset)++] = 3;
+ buf[(*offset)++] = 0x55;
+ buf[(*offset)++] = 0x04;
+ buf[(*offset)++] = dn_type;
+ buf[(*offset)++] = ASN1_PRINTABLE_STR;
+ buf[(*offset)++] = name_size;
+ strcpy(&buf[*offset], name);
+ *offset += name_size;
+
+error:
+ return ret;
+}
+
+static int gen_issuer(const char * dn[], uint8_t *buf, int *offset)
+{
+ int ret = X509_OK;
+ int seq_offset;
+ int seq_size = pre_adjust_with_size(
+ ASN1_SEQUENCE, &seq_offset, buf, offset);
+ char fqdn[128];
+
+ /* we need the common name, so if not configured, work out the fully
+ * qualified domain name */
+ if (dn[X509_COMMON_NAME] == NULL || strlen(dn[X509_COMMON_NAME]) == 0)
+ {
+ int fqdn_len;
+ gethostname(fqdn, sizeof(fqdn));
+ fqdn_len = strlen(fqdn);
+ fqdn[fqdn_len++] = '.';
+ getdomainname(&fqdn[fqdn_len], sizeof(fqdn)-fqdn_len);
+ fqdn_len = strlen(fqdn);
+
+ if (fqdn[fqdn_len-1] == '.') /* ensure '.' is not last char */
+ fqdn[fqdn_len-1] = 0;
+
+ dn[X509_COMMON_NAME] = fqdn;
+ }
+
+ if ((ret = gen_dn(dn[X509_COMMON_NAME], 3, buf, offset)))
+ goto error;
+
+ if (dn[X509_ORGANIZATION] != NULL && strlen(dn[X509_ORGANIZATION]) > 0)
+ {
+ if ((ret = gen_dn(dn[X509_ORGANIZATION], 10, buf, offset)))
+ goto error;
+ }
+
+ if (dn[X509_ORGANIZATIONAL_UNIT] != NULL &&
+ strlen(dn[X509_ORGANIZATIONAL_UNIT]) > 0)
+ {
+ if ((ret = gen_dn(dn[X509_ORGANIZATIONAL_UNIT], 11, buf, offset)))
+ goto error;
+ }
+
+ adjust_with_size(seq_size, seq_offset, buf, offset);
+
+error:
+ return ret;
+}
+
+static void gen_utc_time(uint8_t *buf, int *offset)
+{
+ static const uint8_t time_seq[] =
+ {
+ ASN1_SEQUENCE, 30,
+ ASN1_UTC_TIME, 13,
+ '0', '7', '0', '1', '0', '1', '0', '0', '0', '0', '0', '0', 'Z',
+ ASN1_UTC_TIME, 13, /* make it good for 30 or so years */
+ '3', '8', '0', '1', '0', '1', '0', '0', '0', '0', '0', '0', 'Z'
+ };
+
+ /* fixed time */
+ memcpy(&buf[*offset], time_seq, sizeof(time_seq));
+ *offset += sizeof(time_seq);
+}
+
+static void gen_pub_key2(const RSA_CTX *rsa_ctx, uint8_t *buf, int *offset)
+{
+ static const uint8_t pub_key_seq[] =
+ {
+ ASN1_INTEGER, 0x03, 0x01, 0x00, 0x01 /* INTEGER 65537 */
+ };
+
+ int seq_offset;
+ int pub_key_size = rsa_ctx->num_octets;
+ uint8_t *block = (uint8_t *)alloca(pub_key_size);
+ int seq_size = pre_adjust_with_size(
+ ASN1_SEQUENCE, &seq_offset, buf, offset);
+ buf[(*offset)++] = ASN1_INTEGER;
+ bi_export(rsa_ctx->bi_ctx, rsa_ctx->m, block, pub_key_size);
+
+ if (*block & 0x80) /* make integer positive */
+ {
+ set_gen_length(pub_key_size+1, buf, offset);
+ buf[(*offset)++] = 0;
+ }
+ else
+ set_gen_length(pub_key_size, buf, offset);
+
+ memcpy(&buf[*offset], block, pub_key_size);
+ *offset += pub_key_size;
+ memcpy(&buf[*offset], pub_key_seq, sizeof(pub_key_seq));
+ *offset += sizeof(pub_key_seq);
+ adjust_with_size(seq_size, seq_offset, buf, offset);
+}
+
+static void gen_pub_key1(const RSA_CTX *rsa_ctx, uint8_t *buf, int *offset)
+{
+ int seq_offset;
+ int seq_size = pre_adjust_with_size(
+ ASN1_BIT_STRING, &seq_offset, buf, offset);
+ buf[(*offset)++] = 0; /* bit string is multiple of 8 */
+ gen_pub_key2(rsa_ctx, buf, offset);
+ adjust_with_size(seq_size, seq_offset, buf, offset);
+}
+
+static void gen_pub_key(const RSA_CTX *rsa_ctx, uint8_t *buf, int *offset)
+{
+ /* OBJECT IDENTIFIER rsaEncryption (1 2 840 113549 1 1 1) */
+ static const uint8_t rsa_enc_oid[] =
+ {
+ ASN1_SEQUENCE, 0x0d, ASN1_OID, 0x09,
+ 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x01,
+ ASN1_NULL, 0x00
+ };
+
+ int seq_offset;
+ int seq_size = pre_adjust_with_size(
+ ASN1_SEQUENCE, &seq_offset, buf, offset);
+
+ memcpy(&buf[*offset], rsa_enc_oid, sizeof(rsa_enc_oid));
+ *offset += sizeof(rsa_enc_oid);
+ gen_pub_key1(rsa_ctx, buf, offset);
+ adjust_with_size(seq_size, seq_offset, buf, offset);
+}
+
+static void gen_signature(const RSA_CTX *rsa_ctx, const uint8_t *sha_dgst,
+ uint8_t *buf, int *offset)
+{
+ static const uint8_t asn1_sig[] =
+ {
+ ASN1_SEQUENCE, 0x21, ASN1_SEQUENCE, 0x09, ASN1_OID, 0x05,
+ 0x2b, 0x0e, 0x03, 0x02, 0x1a, /* sha1 (1 3 14 3 2 26) */
+ ASN1_NULL, 0x00, ASN1_OCTET_STRING, 0x14
+ };
+
+ uint8_t *enc_block = (uint8_t *)alloca(rsa_ctx->num_octets);
+ uint8_t *block = (uint8_t *)alloca(sizeof(asn1_sig) + SHA1_SIZE);
+ int sig_size;
+
+ /* add the digest as an embedded asn.1 sequence */
+ memcpy(block, asn1_sig, sizeof(asn1_sig));
+ memcpy(&block[sizeof(asn1_sig)], sha_dgst, SHA1_SIZE);
+
+ sig_size = RSA_encrypt(rsa_ctx, block,
+ sizeof(asn1_sig) + SHA1_SIZE, enc_block, 1);
+
+ buf[(*offset)++] = ASN1_BIT_STRING;
+ set_gen_length(sig_size+1, buf, offset);
+ buf[(*offset)++] = 0; /* bit string is multiple of 8 */
+ memcpy(&buf[*offset], enc_block, sig_size);
+ *offset += sig_size;
+}
+
+static int gen_tbs_cert(const char * dn[],
+ const RSA_CTX *rsa_ctx, uint8_t *buf, int *offset,
+ uint8_t *sha_dgst)
+{
+ int ret = X509_OK;
+ SHA1_CTX sha_ctx;
+ int seq_offset;
+ int begin_tbs = *offset;
+ int seq_size = pre_adjust_with_size(
+ ASN1_SEQUENCE, &seq_offset, buf, offset);
+
+ gen_serial_number(buf, offset);
+ gen_signature_alg(buf, offset);
+
+ /* CA certicate issuer */
+ if ((ret = gen_issuer(dn, buf, offset)))
+ goto error;
+
+ gen_utc_time(buf, offset);
+
+ /* certificate issuer */
+ if ((ret = gen_issuer(dn, buf, offset)))
+ goto error;
+
+ gen_pub_key(rsa_ctx, buf, offset);
+ adjust_with_size(seq_size, seq_offset, buf, offset);
+
+ SHA1_Init(&sha_ctx);
+ SHA1_Update(&sha_ctx, &buf[begin_tbs], *offset-begin_tbs);
+ SHA1_Final(sha_dgst, &sha_ctx);
+
+error:
+ return ret;
+}
+
+/**
+ * Create a new certificate.
+ */
+EXP_FUNC int STDCALL ssl_x509_create(SSL_CTX *ssl_ctx, uint32_t options, const char * dn[], uint8_t **cert_data)
+{
+ int ret = X509_OK, offset = 0, seq_offset;
+ /* allocate enough space to load a new certificate */
+ uint8_t *buf = (uint8_t *)alloca(ssl_ctx->rsa_ctx->num_octets*2 + 512);
+ uint8_t sha_dgst[SHA1_SIZE];
+ int seq_size = pre_adjust_with_size(ASN1_SEQUENCE,
+ &seq_offset, buf, &offset);
+
+ if ((ret = gen_tbs_cert(dn, ssl_ctx->rsa_ctx, buf, &offset, sha_dgst)) < 0)
+ goto error;
+
+ gen_signature_alg(buf, &offset);
+ gen_signature(ssl_ctx->rsa_ctx, sha_dgst, buf, &offset);
+ adjust_with_size(seq_size, seq_offset, buf, &offset);
+ *cert_data = (uint8_t *)malloc(offset); /* create the exact memory for it */
+ memcpy(*cert_data, buf, offset);
+
+error:
+ return ret < 0 ? ret : offset;
+}
+
+#endif
+
diff --git a/axTLS/src/ssl/loader.c b/axTLS/src/ssl/loader.c
new file mode 100644
index 0000000..90231f3
--- /dev/null
+++ b/axTLS/src/ssl/loader.c
@@ -0,0 +1,478 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Load certificates/keys into memory. These can be in many different formats.
+ * PEM support and other formats can be processed here.
+ *
+ * The PEM private keys may be optionally encrypted with AES128 or AES256.
+ * The encrypted PEM keys were generated with something like:
+ *
+ * openssl genrsa -aes128 -passout pass:abcd -out axTLS.key_aes128.pem 512
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "os_port.h"
+#include "ssl.h"
+
+static int do_obj(SSL_CTX *ssl_ctx, int obj_type,
+ SSLObjLoader *ssl_obj, const char *password);
+#ifdef CONFIG_SSL_HAS_PEM
+static int ssl_obj_PEM_load(SSL_CTX *ssl_ctx, int obj_type,
+ SSLObjLoader *ssl_obj, const char *password);
+#endif
+
+/*
+ * Load a file into memory that is in binary DER (or ascii PEM) format.
+ */
+EXP_FUNC int STDCALL ssl_obj_load(SSL_CTX *ssl_ctx, int obj_type,
+ const char *filename, const char *password)
+{
+#ifndef CONFIG_SSL_SKELETON_MODE
+ static const char * const begin = "-----BEGIN";
+ int ret = SSL_OK;
+ SSLObjLoader *ssl_obj = NULL;
+
+ if (filename == NULL)
+ {
+ ret = SSL_ERROR_INVALID_KEY;
+ goto error;
+ }
+
+ ssl_obj = (SSLObjLoader *)calloc(1, sizeof(SSLObjLoader));
+ ssl_obj->len = get_file(filename, &ssl_obj->buf);
+ if (ssl_obj->len <= 0)
+ {
+ ret = SSL_ERROR_INVALID_KEY;
+ goto error;
+ }
+
+ /* is the file a PEM file? */
+ if (strstr((char *)ssl_obj->buf, begin) != NULL)
+ {
+#ifdef CONFIG_SSL_HAS_PEM
+ ret = ssl_obj_PEM_load(ssl_ctx, obj_type, ssl_obj, password);
+#else
+ printf(unsupported_str);
+ ret = SSL_ERROR_NOT_SUPPORTED;
+#endif
+ }
+ else
+ ret = do_obj(ssl_ctx, obj_type, ssl_obj, password);
+
+error:
+ ssl_obj_free(ssl_obj);
+ return ret;
+#else
+ printf(unsupported_str);
+ return SSL_ERROR_NOT_SUPPORTED;
+#endif /* CONFIG_SSL_SKELETON_MODE */
+}
+
+/*
+ * Transfer binary data into the object loader.
+ */
+EXP_FUNC int STDCALL ssl_obj_memory_load(SSL_CTX *ssl_ctx, int mem_type,
+ const uint8_t *data, int len, const char *password)
+{
+ int ret;
+ SSLObjLoader *ssl_obj;
+
+ ssl_obj = (SSLObjLoader *)calloc(1, sizeof(SSLObjLoader));
+ ssl_obj->buf = (uint8_t *)malloc(len);
+ memcpy(ssl_obj->buf, data, len);
+ ssl_obj->len = len;
+ ret = do_obj(ssl_ctx, mem_type, ssl_obj, password);
+ ssl_obj_free(ssl_obj);
+ return ret;
+}
+
+/*
+ * Actually work out what we are doing
+ */
+static int do_obj(SSL_CTX *ssl_ctx, int obj_type,
+ SSLObjLoader *ssl_obj, const char *password)
+{
+ int ret = SSL_OK;
+
+ switch (obj_type)
+ {
+ case SSL_OBJ_RSA_KEY:
+ ret = add_private_key(ssl_ctx, ssl_obj);
+ break;
+
+ case SSL_OBJ_X509_CERT:
+ ret = add_cert(ssl_ctx, ssl_obj->buf, ssl_obj->len);
+ break;
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ case SSL_OBJ_X509_CACERT:
+ add_cert_auth(ssl_ctx, ssl_obj->buf, ssl_obj->len);
+ break;
+#endif
+
+#ifdef CONFIG_SSL_USE_PKCS12
+ case SSL_OBJ_PKCS8:
+ ret = pkcs8_decode(ssl_ctx, ssl_obj, password);
+ break;
+
+ case SSL_OBJ_PKCS12:
+ ret = pkcs12_decode(ssl_ctx, ssl_obj, password);
+ break;
+#endif
+ default:
+ printf(unsupported_str);
+ ret = SSL_ERROR_NOT_SUPPORTED;
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Clean up our mess.
+ */
+void ssl_obj_free(SSLObjLoader *ssl_obj)
+{
+ if (ssl_obj)
+ {
+ free(ssl_obj->buf);
+ free(ssl_obj);
+ }
+}
+
+/*
+ * Support for PEM encoded keys/certificates.
+ */
+#ifdef CONFIG_SSL_HAS_PEM
+
+#define NUM_PEM_TYPES 4
+#define IV_SIZE 16
+#define IS_RSA_PRIVATE_KEY 0
+#define IS_ENCRYPTED_PRIVATE_KEY 1
+#define IS_PRIVATE_KEY 2
+#define IS_CERTIFICATE 3
+
+static const char * const begins[NUM_PEM_TYPES] =
+{
+ "-----BEGIN RSA PRIVATE KEY-----",
+ "-----BEGIN ENCRYPTED PRIVATE KEY-----",
+ "-----BEGIN PRIVATE KEY-----",
+ "-----BEGIN CERTIFICATE-----",
+};
+
+static const char * const ends[NUM_PEM_TYPES] =
+{
+ "-----END RSA PRIVATE KEY-----",
+ "-----END ENCRYPTED PRIVATE KEY-----",
+ "-----END PRIVATE KEY-----",
+ "-----END CERTIFICATE-----",
+};
+
+static const char * const aes_str[2] =
+{
+ "DEK-Info: AES-128-CBC,",
+ "DEK-Info: AES-256-CBC,"
+};
+
+/**
+ * Take a base64 blob of data and decrypt it (using AES) into its
+ * proper ASN.1 form.
+ */
+static int pem_decrypt(const char *where, const char *end,
+ const char *password, SSLObjLoader *ssl_obj)
+{
+ int ret = -1;
+ int is_aes_256 = 0;
+ char *start = NULL;
+ uint8_t iv[IV_SIZE];
+ int i, pem_size;
+ MD5_CTX md5_ctx;
+ AES_CTX aes_ctx;
+ uint8_t key[32]; /* AES256 size */
+
+ if (password == NULL || strlen(password) == 0)
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: Need a password for this PEM file\n"); TTY_FLUSH();
+#endif
+ goto error;
+ }
+
+ if ((start = strstr((const char *)where, aes_str[0]))) /* AES128? */
+ {
+ start += strlen(aes_str[0]);
+ }
+ else if ((start = strstr((const char *)where, aes_str[1]))) /* AES256? */
+ {
+ is_aes_256 = 1;
+ start += strlen(aes_str[1]);
+ }
+ else
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: Unsupported password cipher\n"); TTY_FLUSH();
+#endif
+ goto error;
+ }
+
+ /* convert from hex to binary - assumes uppercase hex */
+ for (i = 0; i < IV_SIZE; i++)
+ {
+ char c = *start++ - '0';
+ iv[i] = (c > 9 ? c + '0' - 'A' + 10 : c) << 4;
+ c = *start++ - '0';
+ iv[i] += (c > 9 ? c + '0' - 'A' + 10 : c);
+ }
+
+ while (*start == '\r' || *start == '\n')
+ start++;
+
+ /* turn base64 into binary */
+ pem_size = (int)(end-start);
+ if (base64_decode(start, pem_size, ssl_obj->buf, &ssl_obj->len) != 0)
+ goto error;
+
+ /* work out the key */
+ MD5_Init(&md5_ctx);
+ MD5_Update(&md5_ctx, (const uint8_t *)password, strlen(password));
+ MD5_Update(&md5_ctx, iv, SALT_SIZE);
+ MD5_Final(key, &md5_ctx);
+
+ if (is_aes_256)
+ {
+ MD5_Init(&md5_ctx);
+ MD5_Update(&md5_ctx, key, MD5_SIZE);
+ MD5_Update(&md5_ctx, (const uint8_t *)password, strlen(password));
+ MD5_Update(&md5_ctx, iv, SALT_SIZE);
+ MD5_Final(&key[MD5_SIZE], &md5_ctx);
+ }
+
+ /* decrypt using the key/iv */
+ AES_set_key(&aes_ctx, key, iv, is_aes_256 ? AES_MODE_256 : AES_MODE_128);
+ AES_convert_key(&aes_ctx);
+ AES_cbc_decrypt(&aes_ctx, ssl_obj->buf, ssl_obj->buf, ssl_obj->len);
+ ret = 0;
+
+error:
+ return ret;
+}
+
+/**
+ * Take a base64 blob of data and turn it into its proper ASN.1 form.
+ */
+static int new_pem_obj(SSL_CTX *ssl_ctx, int is_cacert, char *where,
+ int remain, const char *password)
+{
+ int ret = SSL_ERROR_BAD_CERTIFICATE;
+ SSLObjLoader *ssl_obj = NULL;
+
+ while (remain > 0)
+ {
+ int i, pem_size, obj_type;
+ char *start = NULL, *end = NULL;
+
+ for (i = 0; i < NUM_PEM_TYPES; i++)
+ {
+ if ((start = strstr(where, begins[i])) &&
+ (end = strstr(where, ends[i])))
+ {
+ remain -= (int)(end-where);
+ start += strlen(begins[i]);
+ pem_size = (int)(end-start);
+
+ ssl_obj = (SSLObjLoader *)calloc(1, sizeof(SSLObjLoader));
+
+ /* 4/3 bigger than what we need but so what */
+ ssl_obj->buf = (uint8_t *)calloc(1, pem_size);
+
+ if (i == IS_RSA_PRIVATE_KEY &&
+ strstr(start, "Proc-Type:") &&
+ strstr(start, "4,ENCRYPTED"))
+ {
+ /* check for encrypted PEM file */
+ if (pem_decrypt(start, end, password, ssl_obj) < 0)
+ {
+ ret = SSL_ERROR_BAD_CERTIFICATE;
+ goto error;
+ }
+ }
+ else if (base64_decode(start, pem_size,
+ ssl_obj->buf, &ssl_obj->len) != 0)
+ {
+ ret = SSL_ERROR_BAD_CERTIFICATE;
+ goto error;
+ }
+
+ switch (i)
+ {
+ case IS_RSA_PRIVATE_KEY:
+ obj_type = SSL_OBJ_RSA_KEY;
+ break;
+
+ case IS_ENCRYPTED_PRIVATE_KEY:
+ case IS_PRIVATE_KEY:
+ obj_type = SSL_OBJ_PKCS8;
+ break;
+
+ case IS_CERTIFICATE:
+ obj_type = is_cacert ?
+ SSL_OBJ_X509_CACERT : SSL_OBJ_X509_CERT;
+ break;
+
+ default:
+ ret = SSL_ERROR_BAD_CERTIFICATE;
+ goto error;
+ }
+
+ /* In a format we can now understand - so process it */
+ if ((ret = do_obj(ssl_ctx, obj_type, ssl_obj, password)))
+ goto error;
+
+ end += strlen(ends[i]);
+ remain -= strlen(ends[i]);
+ while (remain > 0 && (*end == '\r' || *end == '\n'))
+ {
+ end++;
+ remain--;
+ }
+
+ where = end;
+ break;
+ }
+ }
+
+ ssl_obj_free(ssl_obj);
+ ssl_obj = NULL;
+ if (start == NULL)
+ break;
+ }
+error:
+ ssl_obj_free(ssl_obj);
+ return ret;
+}
+
+/*
+ * Load a file into memory that is in ASCII PEM format.
+ */
+static int ssl_obj_PEM_load(SSL_CTX *ssl_ctx, int obj_type,
+ SSLObjLoader *ssl_obj, const char *password)
+{
+ char *start;
+
+ /* add a null terminator */
+ ssl_obj->len++;
+ ssl_obj->buf = (uint8_t *)realloc(ssl_obj->buf, ssl_obj->len);
+ ssl_obj->buf[ssl_obj->len-1] = 0;
+ start = (char *)ssl_obj->buf;
+ return new_pem_obj(ssl_ctx, obj_type == SSL_OBJ_X509_CACERT,
+ start, ssl_obj->len, password);
+}
+#endif /* CONFIG_SSL_HAS_PEM */
+
+/**
+ * Load the key/certificates in memory depending on compile-time and user
+ * options.
+ */
+int load_key_certs(SSL_CTX *ssl_ctx)
+{
+ int ret = SSL_OK;
+ uint32_t options = ssl_ctx->options;
+#ifdef CONFIG_SSL_GENERATE_X509_CERT
+ uint8_t *cert_data = NULL;
+ int cert_size;
+ static const char *dn[] =
+ {
+ CONFIG_SSL_X509_COMMON_NAME,
+ CONFIG_SSL_X509_ORGANIZATION_NAME,
+ CONFIG_SSL_X509_ORGANIZATION_UNIT_NAME
+ };
+#endif
+
+ /* do the private key first */
+ if (strlen(CONFIG_SSL_PRIVATE_KEY_LOCATION) > 0)
+ {
+ if ((ret = ssl_obj_load(ssl_ctx, SSL_OBJ_RSA_KEY,
+ CONFIG_SSL_PRIVATE_KEY_LOCATION,
+ CONFIG_SSL_PRIVATE_KEY_PASSWORD)) < 0)
+ goto error;
+ }
+ else if (!(options & SSL_NO_DEFAULT_KEY))
+ {
+#if defined(CONFIG_SSL_USE_DEFAULT_KEY) || defined(CONFIG_SSL_SKELETON_MODE)
+ static const /* saves a few more bytes */
+#include "private_key.h"
+
+ ssl_obj_memory_load(ssl_ctx, SSL_OBJ_RSA_KEY, default_private_key,
+ default_private_key_len, NULL);
+#endif
+ }
+
+ /* now load the certificate */
+#ifdef CONFIG_SSL_GENERATE_X509_CERT
+ if ((cert_size = ssl_x509_create(ssl_ctx, 0, dn, &cert_data)) < 0)
+ {
+ ret = cert_size;
+ goto error;
+ }
+
+ ssl_obj_memory_load(ssl_ctx, SSL_OBJ_X509_CERT, cert_data, cert_size, NULL);
+ free(cert_data);
+#else
+ if (strlen(CONFIG_SSL_X509_CERT_LOCATION))
+ {
+ if ((ret = ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT,
+ CONFIG_SSL_X509_CERT_LOCATION, NULL)) < 0)
+ goto error;
+ }
+ else if (!(options & SSL_NO_DEFAULT_KEY))
+ {
+#if defined(CONFIG_SSL_USE_DEFAULT_KEY) || defined(CONFIG_SSL_SKELETON_MODE)
+ static const /* saves a few bytes and RAM */
+#include "cert.h"
+ ssl_obj_memory_load(ssl_ctx, SSL_OBJ_X509_CERT,
+ default_certificate, default_certificate_len, NULL);
+#endif
+ }
+#endif
+
+error:
+#ifdef CONFIG_SSL_FULL_MODE
+ if (ret)
+ {
+ printf("Error: Certificate or key not loaded\n"); TTY_FLUSH();
+ }
+#endif
+
+ return ret;
+
+}
diff --git a/axTLS/src/ssl/openssl.c b/axTLS/src/ssl/openssl.c
new file mode 100644
index 0000000..6b5c4d8
--- /dev/null
+++ b/axTLS/src/ssl/openssl.c
@@ -0,0 +1,323 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * Enable a subset of openssl compatible functions. We don't aim to be 100%
+ * compatible - just to be able to do basic ports etc.
+ *
+ * Only really tested on mini_httpd, so I'm not too sure how extensive this
+ * port is.
+ */
+
+#include "config.h"
+
+#ifdef CONFIG_OPENSSL_COMPATIBLE
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include "os_port.h"
+#include "ssl.h"
+
+#define OPENSSL_CTX_ATTR ((OPENSSL_CTX *)ssl_ctx->bonus_attr)
+
+static char *key_password = NULL;
+
+void *SSLv23_server_method(void) { return NULL; }
+void *SSLv3_server_method(void) { return NULL; }
+void *TLSv1_server_method(void) { return NULL; }
+void *SSLv23_client_method(void) { return NULL; }
+void *SSLv3_client_method(void) { return NULL; }
+void *TLSv1_client_method(void) { return NULL; }
+
+typedef void * (*ssl_func_type_t)(void);
+typedef void * (*bio_func_type_t)(void);
+
+typedef struct
+{
+ ssl_func_type_t ssl_func_type;
+} OPENSSL_CTX;
+
+SSL_CTX * SSL_CTX_new(ssl_func_type_t meth)
+{
+ SSL_CTX *ssl_ctx = ssl_ctx_new(0, 5);
+ ssl_ctx->bonus_attr = malloc(sizeof(OPENSSL_CTX));
+ OPENSSL_CTX_ATTR->ssl_func_type = meth;
+ return ssl_ctx;
+}
+
+void SSL_CTX_free(SSL_CTX * ssl_ctx)
+{
+ free(ssl_ctx->bonus_attr);
+ ssl_ctx_free(ssl_ctx);
+}
+
+SSL * SSL_new(SSL_CTX *ssl_ctx)
+{
+ SSL *ssl;
+ ssl_func_type_t ssl_func_type;
+
+ ssl = ssl_new(ssl_ctx, -1); /* fd is set later */
+ ssl_func_type = OPENSSL_CTX_ATTR->ssl_func_type;
+
+#ifdef CONFIG_SSL_ENABLE_CLIENT
+ if (ssl_func_type == SSLv23_client_method ||
+ ssl_func_type == SSLv3_client_method ||
+ ssl_func_type == TLSv1_client_method)
+ {
+ SET_SSL_FLAG(SSL_IS_CLIENT);
+ }
+ else
+#endif
+ {
+ ssl->next_state = HS_CLIENT_HELLO;
+ }
+
+ return ssl;
+}
+
+int SSL_set_fd(SSL *s, int fd)
+{
+ s->client_fd = fd;
+ return 1; /* always succeeds */
+}
+
+int SSL_accept(SSL *ssl)
+{
+ while (ssl_read(ssl, NULL) == SSL_OK)
+ {
+ if (ssl->next_state == HS_CLIENT_HELLO)
+ return 1; /* we're done */
+ }
+
+ return -1;
+}
+
+#ifdef CONFIG_SSL_ENABLE_CLIENT
+int SSL_connect(SSL *ssl)
+{
+ return do_client_connect(ssl) == SSL_OK ? 1 : -1;
+}
+#endif
+
+void SSL_free(SSL *ssl)
+{
+ ssl_free(ssl);
+}
+
+int SSL_read(SSL *ssl, void *buf, int num)
+{
+ uint8_t *read_buf;
+ int ret;
+
+ while ((ret = ssl_read(ssl, &read_buf)) == SSL_OK);
+
+ if (ret > SSL_OK)
+ {
+ memcpy(buf, read_buf, ret > num ? num : ret);
+ }
+
+ return ret;
+}
+
+int SSL_write(SSL *ssl, const void *buf, int num)
+{
+ return ssl_write(ssl, buf, num);
+}
+
+int SSL_CTX_use_certificate_file(SSL_CTX *ssl_ctx, const char *file, int type)
+{
+ return (ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, file, NULL) == SSL_OK);
+}
+
+int SSL_CTX_use_PrivateKey_file(SSL_CTX *ssl_ctx, const char *file, int type)
+{
+ return (ssl_obj_load(ssl_ctx, SSL_OBJ_RSA_KEY, file, key_password) == SSL_OK);
+}
+
+int SSL_CTX_use_certificate_ASN1(SSL_CTX *ssl_ctx, int len, const uint8_t *d)
+{
+ return (ssl_obj_memory_load(ssl_ctx,
+ SSL_OBJ_X509_CERT, d, len, NULL) == SSL_OK);
+}
+
+int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const unsigned char *sid_ctx,
+ unsigned int sid_ctx_len)
+{
+ return 1;
+}
+
+int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx)
+{
+ return 1;
+}
+
+int SSL_CTX_use_certificate_chain_file(SSL_CTX *ssl_ctx, const char *file)
+{
+ return (ssl_obj_load(ssl_ctx,
+ SSL_OBJ_X509_CERT, file, NULL) == SSL_OK);
+}
+
+int SSL_shutdown(SSL *ssl)
+{
+ return 1;
+}
+
+/*** get/set session ***/
+SSL_SESSION *SSL_get1_session(SSL *ssl)
+{
+ return (SSL_SESSION *)ssl_get_session_id(ssl); /* note: wrong cast */
+}
+
+int SSL_set_session(SSL *ssl, SSL_SESSION *session)
+{
+ memcpy(ssl->session_id, (uint8_t *)session, SSL_SESSION_ID_SIZE);
+ return 1;
+}
+
+void SSL_SESSION_free(SSL_SESSION *session) { }
+/*** end get/set session ***/
+
+long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg)
+{
+ return 0;
+}
+
+void SSL_CTX_set_verify(SSL_CTX *ctx, int mode,
+ int (*verify_callback)(int, void *)) { }
+
+void SSL_CTX_set_verify_depth(SSL_CTX *ctx,int depth) { }
+
+int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile,
+ const char *CApath)
+{
+ return 1;
+}
+
+void *SSL_load_client_CA_file(const char *file)
+{
+ return (void *)file;
+}
+
+void SSL_CTX_set_client_CA_list(SSL_CTX *ssl_ctx, void *file)
+{
+
+ ssl_obj_load(ssl_ctx, SSL_OBJ_X509_CERT, (const char *)file, NULL);
+}
+
+void SSLv23_method(void) { }
+
+void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, void *cb) { }
+
+void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u)
+{
+ key_password = (char *)u;
+}
+
+int SSL_peek(SSL *ssl, void *buf, int num)
+{
+ memcpy(buf, ssl->bm_data, num);
+ return num;
+}
+
+void SSL_set_bio(SSL *ssl, void *rbio, void *wbio) { }
+
+long SSL_get_verify_result(const SSL *ssl)
+{
+ return ssl_handshake_status(ssl);
+}
+
+int SSL_state(SSL *ssl)
+{
+ return 0x03; // ok state
+}
+
+/** end of could do better list */
+
+void *SSL_get_peer_certificate(const SSL *ssl)
+{
+ return &ssl->ssl_ctx->certs[0];
+}
+
+int SSL_clear(SSL *ssl)
+{
+ return 1;
+}
+
+
+int SSL_CTX_check_private_key(const SSL_CTX *ctx)
+{
+ return 1;
+}
+
+int SSL_CTX_set_cipher_list(SSL *s, const char *str)
+{
+ return 1;
+}
+
+int SSL_get_error(const SSL *ssl, int ret)
+{
+ ssl_display_error(ret);
+ return 0; /* TODO: return proper return code */
+}
+
+void SSL_CTX_set_options(SSL_CTX *ssl_ctx, int option) {}
+int SSL_library_init(void ) { return 1; }
+void SSL_load_error_strings(void ) {}
+void ERR_print_errors_fp(FILE *fp) {}
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+long SSL_CTX_get_timeout(const SSL_CTX *ssl_ctx) {
+ return CONFIG_SSL_EXPIRY_TIME*3600; }
+long SSL_CTX_set_timeout(SSL_CTX *ssl_ctx, long t) {
+ return SSL_CTX_get_timeout(ssl_ctx); }
+#endif
+void BIO_printf(FILE *f, const char *format, ...)
+{
+ va_list(ap);
+ va_start(ap, format);
+ vfprintf(f, format, ap);
+ va_end(ap);
+}
+
+void* BIO_s_null(void) { return NULL; }
+FILE *BIO_new(bio_func_type_t func)
+{
+ if (func == BIO_s_null)
+ return fopen("/dev/null", "r");
+ else
+ return NULL;
+}
+
+FILE *BIO_new_fp(FILE *stream, int close_flag) { return stream; }
+int BIO_free(FILE *a) { if (a != stdout && a != stderr) fclose(a); return 1; }
+
+
+
+#endif
diff --git a/axTLS/src/ssl/os_port.c b/axTLS/src/ssl/os_port.c
new file mode 100644
index 0000000..9859d08
--- /dev/null
+++ b/axTLS/src/ssl/os_port.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @file os_port.c
+ *
+ * OS specific functions.
+ */
+#include <time.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <stdarg.h>
+#include "os_port.h"
+
+#ifdef _MSC_VER
+/**
+ * gettimeofday() not in Win32
+ */
+EXP_FUNC void STDCALL gettimeofday(struct timeval* t, void* timezone)
+{
+#if defined(_WIN32_WCE)
+ t->tv_sec = time(NULL);
+ t->tv_usec = 0; /* 1sec precision only */
+#else
+ struct _timeb timebuffer;
+ _ftime(&timebuffer);
+ t->tv_sec = (long)timebuffer.time;
+ t->tv_usec = 1000 * timebuffer.millitm; /* 1ms precision */
+#endif
+}
+
+/**
+ * strcasecmp() not in Win32
+ */
+EXP_FUNC int STDCALL strcasecmp(const char *s1, const char *s2)
+{
+ while (tolower(*s1) == tolower(*s2++))
+ {
+ if (*s1++ == '\0')
+ {
+ return 0;
+ }
+ }
+
+ return *(unsigned char *)s1 - *(unsigned char *)(s2 - 1);
+}
+
+
+EXP_FUNC int STDCALL getdomainname(char *buf, int buf_size)
+{
+ HKEY hKey;
+ unsigned long datatype;
+ unsigned long bufferlength = buf_size;
+
+ if (RegOpenKeyEx(HKEY_LOCAL_MACHINE,
+ TEXT("SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters"),
+ 0, KEY_QUERY_VALUE, &hKey) != ERROR_SUCCESS)
+ return -1;
+
+ RegQueryValueEx(hKey, "Domain", NULL, &datatype, buf, &bufferlength);
+ RegCloseKey(hKey);
+ return 0;
+}
+#endif
+
+#undef malloc
+#undef realloc
+#undef calloc
+
+static const char * out_of_mem_str = "out of memory";
+static const char * file_open_str = "Could not open file \"%s\"";
+
+/*
+ * Some functions that call display some error trace and then call abort().
+ * This just makes life much easier on embedded systems, since we're
+ * suffering major trauma...
+ */
+EXP_FUNC void * STDCALL ax_malloc(size_t s)
+{
+ void *x;
+
+ if ((x = malloc(s)) == NULL)
+ exit_now(out_of_mem_str);
+
+ return x;
+}
+
+EXP_FUNC void * STDCALL ax_realloc(void *y, size_t s)
+{
+ void *x;
+
+ if ((x = realloc(y, s)) == NULL)
+ exit_now(out_of_mem_str);
+
+ return x;
+}
+
+EXP_FUNC void * STDCALL ax_calloc(size_t n, size_t s)
+{
+ void *x;
+
+ if ((x = calloc(n, s)) == NULL)
+ exit_now(out_of_mem_str);
+
+ return x;
+}
+
+EXP_FUNC int STDCALL ax_open(const char *pathname, int flags)
+{
+ int x;
+
+ if ((x = open(pathname, flags)) < 0)
+ exit_now(file_open_str, pathname);
+
+ return x;
+}
+
+/**
+ * This is a call which will deliberately exit an application, but will
+ * display some information before dying.
+ */
+void exit_now(const char *format, ...)
+{
+ va_list argp;
+
+ va_start(argp, format);
+ vfprintf(stderr, format, argp);
+ va_end(argp);
+ abort();
+}
+
diff --git a/axTLS/src/ssl/os_port.h b/axTLS/src/ssl/os_port.h
new file mode 100644
index 0000000..b2924b4
--- /dev/null
+++ b/axTLS/src/ssl/os_port.h
@@ -0,0 +1,208 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @file os_port.h
+ *
+ * Some stuff to minimise the differences between windows and linux/unix
+ */
+
+#ifndef HEADER_OS_PORT_H
+#define HEADER_OS_PORT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdio.h>
+
+//#if defined(WIN32)
+//#define STDCALL __stdcall
+//#define EXP_FUNC __declspec(dllexport)
+//#else
+#define STDCALL
+#define EXP_FUNC
+//#endif
+
+#if defined(_WIN32_WCE)
+#undef WIN32
+#define WIN32
+#endif
+
+#ifdef WIN32
+
+/* Windows CE stuff */
+#if defined(_WIN32_WCE)
+#include <basetsd.h>
+#define abort() exit(1)
+#else
+#include <io.h>
+#include <process.h>
+#include <sys/timeb.h>
+#include <fcntl.h>
+#endif /* _WIN32_WCE */
+
+#include <winsock.h>
+#include <direct.h>
+#undef getpid
+#undef open
+#undef close
+#undef sleep
+#undef gettimeofday
+#undef dup2
+#undef unlink
+
+#define SOCKET_READ(A,B,C) recv(A,B,C,0)
+#define SOCKET_WRITE(A,B,C) send(A,B,C,0)
+#define SOCKET_CLOSE(A) closesocket(A)
+#define srandom(A) srand(A)
+#define random() rand()
+#define getpid() _getpid()
+#define snprintf _snprintf
+#define open(A,B) _open(A,B)
+#define dup2(A,B) _dup2(A,B)
+#define unlink(A) _unlink(A)
+#define close(A) _close(A)
+#define read(A,B,C) _read(A,B,C)
+#define write(A,B,C) _write(A,B,C)
+#define sleep(A) Sleep(A*1000)
+#define usleep(A) Sleep(A/1000)
+#define strdup(A) _strdup(A)
+#define chroot(A) _chdir(A)
+#define chdir(A) _chdir(A)
+#define alloca(A) _alloca(A)
+#ifndef lseek
+#define lseek(A,B,C) _lseek(A,B,C)
+#endif
+
+/* This fix gets around a problem where a win32 application on a cygwin xterm
+ doesn't display regular output (until a certain buffer limit) - but it works
+ fine under a normal DOS window. This is a hack to get around the issue -
+ see http://www.khngai.com/emacs/tty.php */
+#define TTY_FLUSH() if (!_isatty(_fileno(stdout))) fflush(stdout);
+
+/*
+ * automatically build some library dependencies.
+ */
+#ifdef _MSC_VER
+#pragma comment(lib, "WS2_32.lib")
+#pragma comment(lib, "AdvAPI32.lib")
+
+typedef UINT8 uint8_t;
+typedef INT8 int8_t;
+typedef UINT16 uint16_t;
+typedef INT16 int16_t;
+typedef UINT32 uint32_t;
+typedef INT32 int32_t;
+typedef UINT64 uint64_t;
+typedef INT64 int64_t;
+typedef int socklen_t;
+
+EXP_FUNC void STDCALL gettimeofday(struct timeval* t,void* timezone);
+EXP_FUNC int STDCALL strcasecmp(const char *s1, const char *s2);
+EXP_FUNC int STDCALL getdomainname(char *buf, int buf_size);
+#else
+#include <stdint.h>
+#endif
+
+#else /* Not Win32 */
+
+#ifdef CONFIG_PLATFORM_SOLARIS
+#include <inttypes.h>
+#else
+#include <stdint.h>
+#endif /* Not Solaris */
+
+#include <unistd.h>
+#include <pwd.h>
+#include <netdb.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#define SOCKET_READ(A,B,C) read(A,B,C)
+#define SOCKET_WRITE(A,B,C) write(A,B,C)
+#define SOCKET_CLOSE(A) if (A >= 0) close(A)
+#define TTY_FLUSH()
+
+#endif /* Not Win32 */
+
+/* some functions to mutate the way these work */
+#define malloc(A) ax_malloc(A)
+#ifndef realloc
+#define realloc(A,B) ax_realloc(A,B)
+#endif
+#define calloc(A,B) ax_calloc(A,B)
+
+EXP_FUNC void * STDCALL ax_malloc(size_t s);
+EXP_FUNC void * STDCALL ax_realloc(void *y, size_t s);
+EXP_FUNC void * STDCALL ax_calloc(size_t n, size_t s);
+EXP_FUNC int STDCALL ax_open(const char *pathname, int flags);
+
+#ifdef CONFIG_PLATFORM_LINUX
+void exit_now(const char *format, ...) __attribute((noreturn));
+#else
+void exit_now(const char *format, ...);
+#endif
+
+/* Mutexing definitions */
+#if defined(CONFIG_SSL_CTX_MUTEXING)
+#if defined(WIN32)
+#define SSL_CTX_MUTEX_TYPE HANDLE
+#define SSL_CTX_MUTEX_INIT(A) A=CreateMutex(0, FALSE, 0)
+#define SSL_CTX_MUTEX_DESTROY(A) CloseHandle(A)
+#define SSL_CTX_LOCK(A) WaitForSingleObject(A, INFINITE)
+#define SSL_CTX_UNLOCK(A) ReleaseMutex(A)
+#else
+#include <pthread.h>
+#define SSL_CTX_MUTEX_TYPE pthread_mutex_t
+#define SSL_CTX_MUTEX_INIT(A) pthread_mutex_init(&A, NULL)
+#define SSL_CTX_MUTEX_DESTROY(A) pthread_mutex_destroy(&A)
+#define SSL_CTX_LOCK(A) pthread_mutex_lock(&A)
+#define SSL_CTX_UNLOCK(A) pthread_mutex_unlock(&A)
+#endif
+#else /* no mutexing */
+#define SSL_CTX_MUTEX_INIT(A)
+#define SSL_CTX_MUTEX_DESTROY(A)
+#define SSL_CTX_LOCK(A)
+#define SSL_CTX_UNLOCK(A)
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/axTLS/src/ssl/p12.c b/axTLS/src/ssl/p12.c
new file mode 100644
index 0000000..2bafaf7
--- /dev/null
+++ b/axTLS/src/ssl/p12.c
@@ -0,0 +1,483 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Process PKCS#8/PKCS#12 keys.
+ *
+ * The decoding of a PKCS#12 key is fairly specific - this code was tested on a
+ * key generated with:
+ *
+ * openssl pkcs12 -export -in axTLS.x509_1024.pem -inkey axTLS.key_1024.pem
+ * -keypbe PBE-SHA1-RC4-128 -certpbe PBE-SHA1-RC4-128
+ * -name "p12_withoutCA" -out axTLS.withoutCA.p12 -password pass:abcd
+ *
+ * or with a certificate chain:
+ *
+ * openssl pkcs12 -export -in axTLS.x509_1024.pem -inkey axTLS.key_1024.pem
+ * -certfile axTLS.ca_x509.pem -keypbe PBE-SHA1-RC4-128 -certpbe
+ * PBE-SHA1-RC4-128 -name "p12_withCA" -out axTLS.withCA.p12 -password pass:abcd
+ *
+ * Note that the PBE has to be specified with PBE-SHA1-RC4-128. The
+ * private/public keys/certs have to use RSA encryption. Both the integrity
+ * and privacy passwords are the same.
+ *
+ * The PKCS#8 files were generated with something like:
+ *
+ * PEM format:
+ * openssl pkcs8 -in axTLS.key_512.pem -passout pass:abcd -topk8 -v1
+ * PBE-SHA1-RC4-128 -out axTLS.encrypted_pem.p8
+ *
+ * DER format:
+ * openssl pkcs8 -in axTLS.key_512.pem -passout pass:abcd -topk8 -outform DER
+ * -v1 PBE-SHA1-RC4-128 -out axTLS.encrypted.p8
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "os_port.h"
+#include "ssl.h"
+
+/* all commented out if not used */
+#ifdef CONFIG_SSL_USE_PKCS12
+
+#define BLOCK_SIZE 64
+#define PKCS12_KEY_ID 1
+#define PKCS12_IV_ID 2
+#define PKCS12_MAC_ID 3
+
+static char *make_uni_pass(const char *password, int *uni_pass_len);
+static int p8_decrypt(const char *uni_pass, int uni_pass_len,
+ const uint8_t *salt, int iter,
+ uint8_t *priv_key, int priv_key_len, int id);
+static int p8_add_key(SSL_CTX *ssl_ctx, uint8_t *priv_key);
+static int get_pbe_params(uint8_t *buf, int *offset,
+ const uint8_t **salt, int *iterations);
+
+/*
+ * Take a raw pkcs8 block and then decrypt it and turn it into a normal key.
+ */
+int pkcs8_decode(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj, const char *password)
+{
+ uint8_t *buf = ssl_obj->buf;
+ int len, offset = 0;
+ int iterations;
+ int ret = SSL_NOT_OK;
+ uint8_t *version = NULL;
+ const uint8_t *salt;
+ uint8_t *priv_key;
+ int uni_pass_len;
+ char *uni_pass = make_uni_pass(password, &uni_pass_len);
+
+ if (asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0)
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: Invalid p8 ASN.1 file\n");
+#endif
+ goto error;
+ }
+
+ /* unencrypted key? */
+ if (asn1_get_int(buf, &offset, &version) > 0 && *version == 0)
+ {
+ ret = p8_add_key(ssl_ctx, buf);
+ goto error;
+ }
+
+ if (get_pbe_params(buf, &offset, &salt, &iterations) < 0)
+ goto error;
+
+ if ((len = asn1_next_obj(buf, &offset, ASN1_OCTET_STRING)) < 0)
+ goto error;
+
+ priv_key = &buf[offset];
+
+ p8_decrypt(uni_pass, uni_pass_len, salt,
+ iterations, priv_key, len, PKCS12_KEY_ID);
+ ret = p8_add_key(ssl_ctx, priv_key);
+
+error:
+ free(version);
+ free(uni_pass);
+ return ret;
+}
+
+/*
+ * Take the unencrypted pkcs8 and turn it into a private key
+ */
+static int p8_add_key(SSL_CTX *ssl_ctx, uint8_t *priv_key)
+{
+ uint8_t *buf = priv_key;
+ int len, offset = 0;
+ int ret = SSL_NOT_OK;
+
+ /* Skip the preamble and go straight to the private key.
+ We only support rsaEncryption (1.2.840.113549.1.1.1) */
+ if (asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ asn1_skip_obj(buf, &offset, ASN1_INTEGER) < 0 ||
+ asn1_skip_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OCTET_STRING)) < 0)
+ goto error;
+
+ ret = asn1_get_private_key(&buf[offset], len, &ssl_ctx->rsa_ctx);
+
+error:
+ return ret;
+}
+
+/*
+ * Create the unicode password
+ */
+static char *make_uni_pass(const char *password, int *uni_pass_len)
+{
+ int pass_len = 0, i;
+ char *uni_pass;
+
+ if (password == NULL)
+ {
+ password = "";
+ }
+
+ uni_pass = (char *)malloc((strlen(password)+1)*2);
+
+ /* modify the password into a unicode version */
+ for (i = 0; i < (int)strlen(password); i++)
+ {
+ uni_pass[pass_len++] = 0;
+ uni_pass[pass_len++] = password[i];
+ }
+
+ uni_pass[pass_len++] = 0; /* null terminate */
+ uni_pass[pass_len++] = 0;
+ *uni_pass_len = pass_len;
+ return uni_pass;
+}
+
+/*
+ * Decrypt a pkcs8 block.
+ */
+static int p8_decrypt(const char *uni_pass, int uni_pass_len,
+ const uint8_t *salt, int iter,
+ uint8_t *priv_key, int priv_key_len, int id)
+{
+ uint8_t p[BLOCK_SIZE*2];
+ uint8_t d[BLOCK_SIZE];
+ uint8_t Ai[SHA1_SIZE];
+ SHA1_CTX sha_ctx;
+ RC4_CTX rc4_ctx;
+ int i;
+
+ for (i = 0; i < BLOCK_SIZE; i++)
+ {
+ p[i] = salt[i % SALT_SIZE];
+ p[BLOCK_SIZE+i] = uni_pass[i % uni_pass_len];
+ d[i] = id;
+ }
+
+ /* get the key - no IV since we are using RC4 */
+ SHA1_Init(&sha_ctx);
+ SHA1_Update(&sha_ctx, d, sizeof(d));
+ SHA1_Update(&sha_ctx, p, sizeof(p));
+ SHA1_Final(Ai, &sha_ctx);
+
+ for (i = 1; i < iter; i++)
+ {
+ SHA1_Init(&sha_ctx);
+ SHA1_Update(&sha_ctx, Ai, SHA1_SIZE);
+ SHA1_Final(Ai, &sha_ctx);
+ }
+
+ /* do the decryption */
+ if (id == PKCS12_KEY_ID)
+ {
+ RC4_setup(&rc4_ctx, Ai, 16);
+ RC4_crypt(&rc4_ctx, priv_key, priv_key, priv_key_len);
+ }
+ else /* MAC */
+ memcpy(priv_key, Ai, SHA1_SIZE);
+
+ return 0;
+}
+
+/*
+ * Take a raw pkcs12 block and the decrypt it and turn it into a certificate(s)
+ * and keys.
+ */
+int pkcs12_decode(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj, const char *password)
+{
+ uint8_t *buf = ssl_obj->buf;
+ int len, iterations, auth_safes_start,
+ auth_safes_end, auth_safes_len, key_offset, offset = 0;
+ int all_certs = 0;
+ uint8_t *version = NULL, *auth_safes = NULL, *cert, *orig_mac;
+ uint8_t key[SHA1_SIZE];
+ uint8_t mac[SHA1_SIZE];
+ const uint8_t *salt;
+ int uni_pass_len, ret = SSL_OK;
+ char *uni_pass = make_uni_pass(password, &uni_pass_len);
+ static const uint8_t pkcs_data[] = /* pkc7 data */
+ { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x01 };
+ static const uint8_t pkcs_encrypted[] = /* pkc7 encrypted */
+ { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x07, 0x06 };
+ static const uint8_t pkcs8_key_bag[] = /* 1.2.840.113549.1.12.10.1.2 */
+ { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x0c, 0x0a, 0x01, 0x02 };
+
+ if (asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0)
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: Invalid p12 ASN.1 file\n");
+#endif
+ goto error;
+ }
+
+ if (asn1_get_int(buf, &offset, &version) < 0 || *version != 3)
+ {
+ ret = SSL_ERROR_INVALID_VERSION;
+ goto error;
+ }
+
+ /* remove all the boring pcks7 bits */
+ if (asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OID)) < 0 ||
+ len != sizeof(pkcs_data) ||
+ memcmp(&buf[offset], pkcs_data, sizeof(pkcs_data)))
+ goto error;
+
+ offset += len;
+
+ if (asn1_next_obj(buf, &offset, ASN1_EXPLICIT_TAG) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_OCTET_STRING) < 0)
+ goto error;
+
+ /* work out the MAC start/end points (done on AuthSafes) */
+ auth_safes_start = offset;
+ auth_safes_end = offset;
+ if (asn1_skip_obj(buf, &auth_safes_end, ASN1_SEQUENCE) < 0)
+ goto error;
+
+ auth_safes_len = auth_safes_end - auth_safes_start;
+ auth_safes = malloc(auth_safes_len);
+
+ memcpy(auth_safes, &buf[auth_safes_start], auth_safes_len);
+
+ if (asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OID)) < 0 ||
+ (len != sizeof(pkcs_encrypted) ||
+ memcmp(&buf[offset], pkcs_encrypted, sizeof(pkcs_encrypted))))
+ goto error;
+
+ offset += len;
+
+ if (asn1_next_obj(buf, &offset, ASN1_EXPLICIT_TAG) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ asn1_skip_obj(buf, &offset, ASN1_INTEGER) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OID)) < 0 ||
+ len != sizeof(pkcs_data) ||
+ memcmp(&buf[offset], pkcs_data, sizeof(pkcs_data)))
+ goto error;
+
+ offset += len;
+
+ /* work out the salt for the certificate */
+ if (get_pbe_params(buf, &offset, &salt, &iterations) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_IMPLICIT_TAG)) < 0)
+ goto error;
+
+ /* decrypt the certificate */
+ cert = &buf[offset];
+ if ((ret = p8_decrypt(uni_pass, uni_pass_len, salt, iterations, cert,
+ len, PKCS12_KEY_ID)) < 0)
+ goto error;
+
+ offset += len;
+
+ /* load the certificate */
+ key_offset = 0;
+ all_certs = asn1_next_obj(cert, &key_offset, ASN1_SEQUENCE);
+
+ /* keep going until all certs are loaded */
+ while (key_offset < all_certs)
+ {
+ int cert_offset = key_offset;
+
+ if (asn1_skip_obj(cert, &cert_offset, ASN1_SEQUENCE) < 0 ||
+ asn1_next_obj(cert, &key_offset, ASN1_SEQUENCE) < 0 ||
+ asn1_skip_obj(cert, &key_offset, ASN1_OID) < 0 ||
+ asn1_next_obj(cert, &key_offset, ASN1_EXPLICIT_TAG) < 0 ||
+ asn1_next_obj(cert, &key_offset, ASN1_SEQUENCE) < 0 ||
+ asn1_skip_obj(cert, &key_offset, ASN1_OID) < 0 ||
+ asn1_next_obj(cert, &key_offset, ASN1_EXPLICIT_TAG) < 0 ||
+ (len = asn1_next_obj(cert, &key_offset, ASN1_OCTET_STRING)) < 0)
+ goto error;
+
+ if ((ret = add_cert(ssl_ctx, &cert[key_offset], len)) < 0)
+ goto error;
+
+ key_offset = cert_offset;
+ }
+
+ if (asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OID)) < 0 ||
+ len != sizeof(pkcs_data) ||
+ memcmp(&buf[offset], pkcs_data, sizeof(pkcs_data)))
+ goto error;
+
+ offset += len;
+
+ if (asn1_next_obj(buf, &offset, ASN1_EXPLICIT_TAG) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_OCTET_STRING) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OID)) < 0 ||
+ (len != sizeof(pkcs8_key_bag)) ||
+ memcmp(&buf[offset], pkcs8_key_bag, sizeof(pkcs8_key_bag)))
+ goto error;
+
+ offset += len;
+
+ /* work out the salt for the private key */
+ if (asn1_next_obj(buf, &offset, ASN1_EXPLICIT_TAG) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ get_pbe_params(buf, &offset, &salt, &iterations) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OCTET_STRING)) < 0)
+ goto error;
+
+ /* decrypt the private key */
+ cert = &buf[offset];
+ if ((ret = p8_decrypt(uni_pass, uni_pass_len, salt, iterations, cert,
+ len, PKCS12_KEY_ID)) < 0)
+ goto error;
+
+ offset += len;
+
+ /* load the private key */
+ if ((ret = p8_add_key(ssl_ctx, cert)) < 0)
+ goto error;
+
+ /* miss out on friendly name, local key id etc */
+ if (asn1_skip_obj(buf, &offset, ASN1_SET) < 0)
+ goto error;
+
+ /* work out the MAC */
+ if (asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ asn1_next_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ asn1_skip_obj(buf, &offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, &offset, ASN1_OCTET_STRING)) < 0 ||
+ len != SHA1_SIZE)
+ goto error;
+
+ orig_mac = &buf[offset];
+ offset += len;
+
+ /* get the salt */
+ if ((len = asn1_next_obj(buf, &offset, ASN1_OCTET_STRING)) < 0 || len != 8)
+ goto error;
+
+ salt = &buf[offset];
+
+ /* work out what the mac should be */
+ if ((ret = p8_decrypt(uni_pass, uni_pass_len, salt, iterations,
+ key, SHA1_SIZE, PKCS12_MAC_ID)) < 0)
+ goto error;
+
+ hmac_sha1(auth_safes, auth_safes_len, key, SHA1_SIZE, mac);
+
+ if (memcmp(mac, orig_mac, SHA1_SIZE))
+ {
+ ret = SSL_ERROR_INVALID_HMAC;
+ goto error;
+ }
+
+error:
+ free(version);
+ free(uni_pass);
+ free(auth_safes);
+ return ret;
+}
+
+/*
+ * Retrieve the salt/iteration details from a PBE block.
+ */
+static int get_pbe_params(uint8_t *buf, int *offset,
+ const uint8_t **salt, int *iterations)
+{
+ static const uint8_t pbeSH1RC4[] = /* pbeWithSHAAnd128BitRC4 */
+ { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x0c, 0x01, 0x01 };
+
+ int i, len;
+ uint8_t *iter = NULL;
+ int error_code = SSL_ERROR_NOT_SUPPORTED;
+
+ /* Get the PBE type */
+ if (asn1_next_obj(buf, offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, offset, ASN1_OID)) < 0)
+ goto error;
+
+ /* we expect pbeWithSHAAnd128BitRC4 (1.2.840.113549.1.12.1.1)
+ which is the only algorithm we support */
+ if (len != sizeof(pbeSH1RC4) ||
+ memcmp(&buf[*offset], pbeSH1RC4, sizeof(pbeSH1RC4)))
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: pkcs8/pkcs12 must use \"PBE-SHA1-RC4-128\"\n");
+#endif
+ goto error;
+ }
+
+ *offset += len;
+
+ if (asn1_next_obj(buf, offset, ASN1_SEQUENCE) < 0 ||
+ (len = asn1_next_obj(buf, offset, ASN1_OCTET_STRING)) < 0 ||
+ len != 8)
+ goto error;
+
+ *salt = &buf[*offset];
+ *offset += len;
+
+ if ((len = asn1_get_int(buf, offset, &iter)) < 0)
+ goto error;
+
+ *iterations = 0;
+ for (i = 0; i < len; i++)
+ {
+ (*iterations) <<= 8;
+ (*iterations) += iter[i];
+ }
+
+ free(iter);
+ error_code = SSL_OK; /* got here - we are ok */
+
+error:
+ return error_code;
+}
+
+#endif
diff --git a/axTLS/src/ssl/private_key.h b/axTLS/src/ssl/private_key.h
new file mode 100644
index 0000000..ce7985c
--- /dev/null
+++ b/axTLS/src/ssl/private_key.h
@@ -0,0 +1,54 @@
+unsigned char default_private_key[] = {
+ 0x30, 0x82, 0x02, 0x5d, 0x02, 0x01, 0x00, 0x02, 0x81, 0x81, 0x00, 0xcd,
+ 0xfd, 0x89, 0x48, 0xbe, 0x36, 0xb9, 0x95, 0x76, 0xd4, 0x13, 0x30, 0x0e,
+ 0xbf, 0xb2, 0xed, 0x67, 0x0a, 0xc0, 0x16, 0x3f, 0x51, 0x09, 0x9d, 0x29,
+ 0x2f, 0xb2, 0x6d, 0x3f, 0x3e, 0x6c, 0x2f, 0x90, 0x80, 0xa1, 0x71, 0xdf,
+ 0xbe, 0x38, 0xc5, 0xcb, 0xa9, 0x9a, 0x40, 0x14, 0x90, 0x0a, 0xf9, 0xb7,
+ 0x07, 0x0b, 0xe1, 0xda, 0xe7, 0x09, 0xbf, 0x0d, 0x57, 0x41, 0x86, 0x60,
+ 0xa1, 0xc1, 0x27, 0x91, 0x5b, 0x0a, 0x98, 0x46, 0x1b, 0xf6, 0xa2, 0x84,
+ 0xf8, 0x65, 0xc7, 0xce, 0x2d, 0x96, 0x17, 0xaa, 0x91, 0xf8, 0x61, 0x04,
+ 0x50, 0x70, 0xeb, 0xb4, 0x43, 0xb7, 0xdc, 0x9a, 0xcc, 0x31, 0x01, 0x14,
+ 0xd4, 0xcd, 0xcc, 0xc2, 0x37, 0x6d, 0x69, 0x82, 0xd6, 0xc6, 0xc4, 0xbe,
+ 0xf2, 0x34, 0xa5, 0xc9, 0xa6, 0x19, 0x53, 0x32, 0x7a, 0x86, 0x0e, 0x91,
+ 0x82, 0x0f, 0xa1, 0x42, 0x54, 0xaa, 0x01, 0x02, 0x03, 0x01, 0x00, 0x01,
+ 0x02, 0x81, 0x81, 0x00, 0x95, 0xaa, 0x6e, 0x11, 0xf5, 0x6a, 0x8b, 0xa2,
+ 0xc6, 0x48, 0xc6, 0x7c, 0x37, 0x6b, 0x1f, 0x55, 0x10, 0x76, 0x26, 0x24,
+ 0xc3, 0xf2, 0x5c, 0x5a, 0xdd, 0x2e, 0xf3, 0xa4, 0x1e, 0xbc, 0x7b, 0x1c,
+ 0x80, 0x10, 0x85, 0xbc, 0xd8, 0x45, 0x3c, 0xb8, 0xb2, 0x06, 0x53, 0xb5,
+ 0xd5, 0x7a, 0xe7, 0x0e, 0x92, 0xe6, 0x42, 0xc2, 0xe2, 0x2a, 0xd5, 0xd1,
+ 0x03, 0x9f, 0x6f, 0x53, 0x74, 0x68, 0x72, 0x8e, 0xbf, 0x03, 0xbb, 0xab,
+ 0xbd, 0xa1, 0xf9, 0x81, 0x7d, 0x12, 0xd4, 0x9d, 0xb6, 0xae, 0x4c, 0xad,
+ 0xca, 0xa8, 0xc9, 0x80, 0x8d, 0x0d, 0xd5, 0xd0, 0xa1, 0xbf, 0xec, 0x60,
+ 0x48, 0x49, 0xed, 0x97, 0x0f, 0x5e, 0xed, 0xfc, 0x39, 0x15, 0x96, 0x9e,
+ 0x5d, 0xe2, 0xb4, 0x5d, 0x2e, 0x04, 0xdc, 0x08, 0xa2, 0x65, 0x29, 0x2d,
+ 0x37, 0xfb, 0x62, 0x90, 0x1b, 0x7b, 0xe5, 0x3a, 0x58, 0x05, 0x55, 0xc1,
+ 0x02, 0x41, 0x00, 0xfc, 0x69, 0x28, 0xc9, 0xa8, 0xc4, 0x5c, 0xe3, 0xd0,
+ 0x5e, 0xaa, 0xda, 0xde, 0x87, 0x74, 0xdb, 0xcb, 0x40, 0x78, 0x8e, 0x1d,
+ 0x12, 0x96, 0x16, 0x61, 0x3f, 0xb3, 0x3e, 0xa3, 0x0d, 0xdc, 0x49, 0xa5,
+ 0x25, 0x87, 0xc5, 0x97, 0x85, 0x9d, 0xbb, 0xb4, 0xf0, 0x44, 0xfd, 0x6c,
+ 0xe8, 0xd2, 0x8c, 0xec, 0x33, 0x81, 0x46, 0x1e, 0x10, 0x12, 0x33, 0x16,
+ 0x95, 0x00, 0x4f, 0x75, 0xb4, 0xe5, 0x79, 0x02, 0x41, 0x00, 0xd0, 0xeb,
+ 0x65, 0x07, 0x10, 0x3b, 0xd9, 0x03, 0xeb, 0xdc, 0x6f, 0x4b, 0x8f, 0xc3,
+ 0x87, 0xce, 0x76, 0xd6, 0xc5, 0x14, 0x21, 0x4e, 0xe7, 0x4f, 0x1b, 0xe8,
+ 0x05, 0xf8, 0x84, 0x1a, 0xe0, 0xc5, 0xd6, 0xe3, 0x08, 0xb3, 0x54, 0x57,
+ 0x02, 0x1f, 0xd4, 0xd9, 0xfb, 0xff, 0x40, 0xb1, 0x56, 0x1c, 0x60, 0xf7,
+ 0xac, 0x91, 0xf3, 0xd3, 0xc6, 0x7f, 0x84, 0xfd, 0x84, 0x9d, 0xea, 0x26,
+ 0xee, 0xc9, 0x02, 0x41, 0x00, 0xa6, 0xcf, 0x1c, 0x6c, 0x81, 0x03, 0x1c,
+ 0x5c, 0x56, 0x05, 0x6a, 0x26, 0x70, 0xef, 0xd6, 0x13, 0xb7, 0x74, 0x28,
+ 0xf7, 0xca, 0x50, 0xd1, 0x2d, 0x83, 0x21, 0x64, 0xe4, 0xdd, 0x3f, 0x38,
+ 0xb8, 0xd6, 0xd2, 0x41, 0xb3, 0x1c, 0x9a, 0xea, 0x0d, 0xf5, 0xda, 0xdf,
+ 0xcd, 0x17, 0x9f, 0x9a, 0x1e, 0x15, 0xaf, 0x48, 0x1c, 0xbd, 0x9b, 0x63,
+ 0x5b, 0xad, 0xed, 0xd4, 0xa1, 0xae, 0xa9, 0x59, 0x09, 0x02, 0x40, 0x4e,
+ 0x08, 0xce, 0xa8, 0x8f, 0xc0, 0xba, 0xf3, 0x83, 0x02, 0xc8, 0x33, 0x62,
+ 0x14, 0x77, 0xc2, 0x7f, 0x93, 0x02, 0xf3, 0xdc, 0xe9, 0x1a, 0xee, 0xea,
+ 0x8e, 0x84, 0xc4, 0x69, 0x9b, 0x9c, 0x7f, 0x69, 0x1f, 0x4e, 0x1d, 0xa5,
+ 0x90, 0x06, 0x44, 0x1b, 0x7d, 0xfc, 0x69, 0x40, 0x21, 0xbc, 0xf7, 0x46,
+ 0xa4, 0xdc, 0x39, 0x7b, 0xe8, 0x8b, 0x49, 0x10, 0x44, 0x9d, 0x67, 0x5a,
+ 0x91, 0x86, 0x39, 0x02, 0x40, 0x41, 0x2c, 0x4e, 0xfe, 0xd9, 0x90, 0x89,
+ 0x00, 0x5c, 0x94, 0x0a, 0x4a, 0x7e, 0x1b, 0x1a, 0x80, 0x06, 0x01, 0x37,
+ 0xda, 0x50, 0x61, 0x9d, 0x9c, 0xfe, 0x25, 0x7f, 0xd8, 0xd4, 0xc4, 0x9e,
+ 0x81, 0xf2, 0x0c, 0x1e, 0x38, 0x21, 0x1e, 0x90, 0x3f, 0xd4, 0xba, 0x6c,
+ 0x53, 0xcb, 0xf0, 0x77, 0x79, 0x9b, 0xf1, 0xfa, 0x3f, 0x81, 0xdc, 0xf3,
+ 0x21, 0x02, 0x6d, 0xb7, 0x95, 0xc3, 0x2e, 0xce, 0xd5
+};
+unsigned int default_private_key_len = 609;
diff --git a/axTLS/src/ssl/ssl.h b/axTLS/src/ssl/ssl.h
new file mode 100644
index 0000000..198efc6
--- /dev/null
+++ b/axTLS/src/ssl/ssl.h
@@ -0,0 +1,499 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @mainpage axTLS API
+ *
+ * @image html axolotl.jpg
+ *
+ * The axTLS library has features such as:
+ * - The TLSv1 SSL client/server protocol
+ * - No requirement to use any openssl libraries.
+ * - A choice between AES block (128/256 bit) and RC4 (128 bit) stream ciphers.
+ * - RSA encryption/decryption with variable sized keys (up to 4096 bits).
+ * - Certificate chaining and peer authentication.
+ * - Session resumption, session renegotiation.
+ * - ASN.1, X.509, PKCS#8, PKCS#12 keys/certificates with DER/PEM encoding.
+ * - Highly configurable compile time options.
+ * - Portable across many platforms (written in ANSI C), and has language
+ * bindings in C, C#, VB.NET, Java, Perl and Lua.
+ * - Partial openssl API compatibility (via a wrapper).
+ * - A very small footprint (around 50-60kB for the library in 'server-only'
+ * mode).
+ * - No dependencies on sockets - can use serial connections for example.
+ * - A very simple API - ~ 20 functions/methods.
+ *
+ * A list of these functions/methods are described below.
+ *
+ * @ref c_api
+ *
+ * @ref bigint_api
+ *
+ * @ref csharp_api
+ *
+ * @ref java_api
+ */
+#ifndef HEADER_SSL_H
+#define HEADER_SSL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <time.h>
+
+/* need to predefine before ssl_lib.h gets to it */
+#define SSL_SESSION_ID_SIZE 32
+
+#include "tls1.h"
+
+/* The optional parameters that can be given to the client/server SSL engine */
+#define SSL_CLIENT_AUTHENTICATION 0x00010000
+#define SSL_SERVER_VERIFY_LATER 0x00020000
+#define SSL_NO_DEFAULT_KEY 0x00040000
+#define SSL_DISPLAY_STATES 0x00080000
+#define SSL_DISPLAY_BYTES 0x00100000
+#define SSL_DISPLAY_CERTS 0x00200000
+#define SSL_DISPLAY_RSA 0x00400000
+#define SSL_CONNECT_IN_PARTS 0x00800000
+
+/* errors that can be generated */
+#define SSL_OK 0
+#define SSL_NOT_OK -1
+#define SSL_ERROR_DEAD -2
+#define SSL_CLOSE_NOTIFY -3
+#define SSL_ERROR_CONN_LOST -256
+#define SSL_ERROR_SOCK_SETUP_FAILURE -258
+#define SSL_ERROR_INVALID_HANDSHAKE -260
+#define SSL_ERROR_INVALID_PROT_MSG -261
+#define SSL_ERROR_INVALID_HMAC -262
+#define SSL_ERROR_INVALID_VERSION -263
+#define SSL_ERROR_INVALID_SESSION -265
+#define SSL_ERROR_NO_CIPHER -266
+#define SSL_ERROR_BAD_CERTIFICATE -268
+#define SSL_ERROR_INVALID_KEY -269
+#define SSL_ERROR_FINISHED_INVALID -271
+#define SSL_ERROR_NO_CERT_DEFINED -272
+#define SSL_ERROR_NO_CLIENT_RENOG -273
+#define SSL_ERROR_NOT_SUPPORTED -274
+#define SSL_X509_OFFSET -512
+#define SSL_X509_ERROR(A) (SSL_X509_OFFSET+A)
+
+/* alert types that are recognized */
+#define SSL_ALERT_TYPE_WARNING 1
+#define SLL_ALERT_TYPE_FATAL 2
+
+/* these are all the alerts that are recognized */
+#define SSL_ALERT_CLOSE_NOTIFY 0
+#define SSL_ALERT_UNEXPECTED_MESSAGE 10
+#define SSL_ALERT_BAD_RECORD_MAC 20
+#define SSL_ALERT_HANDSHAKE_FAILURE 40
+#define SSL_ALERT_BAD_CERTIFICATE 42
+#define SSL_ALERT_ILLEGAL_PARAMETER 47
+#define SSL_ALERT_DECODE_ERROR 50
+#define SSL_ALERT_DECRYPT_ERROR 51
+#define SSL_ALERT_INVALID_VERSION 70
+#define SSL_ALERT_NO_RENEGOTIATION 100
+
+/* The ciphers that are supported */
+#define SSL_AES128_SHA 0x2f
+#define SSL_AES256_SHA 0x35
+#define SSL_RC4_128_SHA 0x05
+#define SSL_RC4_128_MD5 0x04
+
+/* build mode ids' */
+#define SSL_BUILD_SKELETON_MODE 0x01
+#define SSL_BUILD_SERVER_ONLY 0x02
+#define SSL_BUILD_ENABLE_VERIFICATION 0x03
+#define SSL_BUILD_ENABLE_CLIENT 0x04
+#define SSL_BUILD_FULL_MODE 0x05
+
+/* offsets to retrieve configuration information */
+#define SSL_BUILD_MODE 0
+#define SSL_MAX_CERT_CFG_OFFSET 1
+#define SSL_MAX_CA_CERT_CFG_OFFSET 2
+#define SSL_HAS_PEM 3
+
+/* default session sizes */
+#define SSL_DEFAULT_SVR_SESS 5
+#define SSL_DEFAULT_CLNT_SESS 1
+
+/* X.509/X.520 distinguished name types */
+#define SSL_X509_CERT_COMMON_NAME 0
+#define SSL_X509_CERT_ORGANIZATION 1
+#define SSL_X509_CERT_ORGANIZATIONAL_NAME 2
+#define SSL_X509_CA_CERT_COMMON_NAME 3
+#define SSL_X509_CA_CERT_ORGANIZATION 4
+#define SSL_X509_CA_CERT_ORGANIZATIONAL_NAME 5
+
+/* SSL object loader types */
+#define SSL_OBJ_X509_CERT 1
+#define SSL_OBJ_X509_CACERT 2
+#define SSL_OBJ_RSA_KEY 3
+#define SSL_OBJ_PKCS8 4
+#define SSL_OBJ_PKCS12 5
+
+/**
+ * @defgroup c_api Standard C API
+ * @brief The standard interface in C.
+ * @{
+ */
+
+/**
+ * @brief Establish a new client/server context.
+ *
+ * This function is called before any client/server SSL connections are made.
+ *
+ * Each new connection will use the this context's private key and
+ * certificate chain. If a different certificate chain is required, then a
+ * different context needs to be be used.
+ *
+ * There are two threading models supported - a single thread with one
+ * SSL_CTX can support any number of SSL connections - and multiple threads can
+ * support one SSL_CTX object each (the default). But if a single SSL_CTX
+ * object uses many SSL objects in individual threads, then the
+ * CONFIG_SSL_CTX_MUTEXING option needs to be configured.
+ *
+ * @param options [in] Any particular options. At present the options
+ * supported are:
+ * - SSL_SERVER_VERIFY_LATER (client only): Don't stop a handshake if the server
+ * authentication fails. The certificate can be authenticated later with a
+ * call to ssl_verify_cert().
+ * - SSL_CLIENT_AUTHENTICATION (server only): Enforce client authentication
+ * i.e. each handshake will include a "certificate request" message from the
+ * server. Only available if verification has been enabled.
+ * - SSL_DISPLAY_BYTES (full mode build only): Display the byte sequences
+ * during the handshake.
+ * - SSL_DISPLAY_STATES (full mode build only): Display the state changes
+ * during the handshake.
+ * - SSL_DISPLAY_CERTS (full mode build only): Display the certificates that
+ * are passed during a handshake.
+ * - SSL_DISPLAY_RSA (full mode build only): Display the RSA key details that
+ * are passed during a handshake.
+ * - SSL_CONNECT_IN_PARTS (client only): To use a non-blocking version of
+ * ssl_client_new().
+ * @param num_sessions [in] The number of sessions to be used for session
+ * caching. If this value is 0, then there is no session caching. This option
+ * is not used in skeleton mode.
+ * @return A client/server context.
+ */
+EXP_FUNC SSL_CTX * STDCALL ssl_ctx_new(uint32_t options, int num_sessions);
+
+/**
+ * @brief Remove a client/server context.
+ *
+ * Frees any used resources used by this context. Each connection will be
+ * sent a "Close Notify" alert (if possible).
+ * @param ssl_ctx [in] The client/server context.
+ */
+EXP_FUNC void STDCALL ssl_ctx_free(SSL_CTX *ssl_ctx);
+
+/**
+ * @brief (server only) Establish a new SSL connection to an SSL client.
+ *
+ * It is up to the application to establish the logical connection (whether it
+ * is a socket, serial connection etc).
+ * @param ssl_ctx [in] The server context.
+ * @param client_fd [in] The client's file descriptor.
+ * @return An SSL object reference.
+ */
+EXP_FUNC SSL * STDCALL ssl_server_new(SSL_CTX *ssl_ctx, int client_fd);
+
+/**
+ * @brief (client only) Establish a new SSL connection to an SSL server.
+ *
+ * It is up to the application to establish the initial logical connection
+ * (whether it is a socket, serial connection etc).
+ *
+ * This is a normally a blocking call - it will finish when the handshake is
+ * complete (or has failed). To use in non-blocking mode, set
+ * SSL_CONNECT_IN_PARTS in ssl_ctx_new().
+ * @param ssl_ctx [in] The client context.
+ * @param client_fd [in] The client's file descriptor.
+ * @param session_id [in] A 32 byte session id for session resumption. This
+ * can be null if no session resumption is being used or required. This option
+ * is not used in skeleton mode.
+ * @param sess_id_size The size of the session id (max 32)
+ * @return An SSL object reference. Use ssl_handshake_status() to check
+ * if a handshake succeeded.
+ */
+EXP_FUNC SSL * STDCALL ssl_client_new(SSL_CTX *ssl_ctx, int client_fd, const uint8_t *session_id, uint8_t sess_id_size);
+
+/**
+ * @brief Free any used resources on this connection.
+
+ * A "Close Notify" message is sent on this connection (if possible). It is up
+ * to the application to close the socket or file descriptor.
+ * @param ssl [in] The ssl object reference.
+ */
+EXP_FUNC void STDCALL ssl_free(SSL *ssl);
+
+/**
+ * @brief Read the SSL data stream.
+ * If the socket is non-blocking and data is blocked then SSO_OK will be
+ * returned.
+ * @param ssl [in] An SSL object reference.
+ * @param in_data [out] If the read was successful, a pointer to the read
+ * buffer will be here. Do NOT ever free this memory as this buffer is used in
+ * sucessive calls. If the call was unsuccessful, this value will be null.
+ * @return The number of decrypted bytes:
+ * - if > 0, then the handshaking is complete and we are returning the number
+ * of decrypted bytes.
+ * - SSL_OK if the handshaking stage is successful (but not yet complete).
+ * - < 0 if an error.
+ * @see ssl.h for the error code list.
+ * @note Use in_data before doing any successive ssl calls.
+ */
+EXP_FUNC int STDCALL ssl_read(SSL *ssl, uint8_t **in_data);
+
+/**
+ * @brief Write to the SSL data stream.
+ * if the socket is non-blocking and data is blocked then a check is made
+ * to ensure that all data is sent (i.e. blocked mode is forced).
+ * @param ssl [in] An SSL obect reference.
+ * @param out_data [in] The data to be written
+ * @param out_len [in] The number of bytes to be written.
+ * @return The number of bytes sent, or if < 0 if an error.
+ * @see ssl.h for the error code list.
+ */
+EXP_FUNC int STDCALL ssl_write(SSL *ssl, const uint8_t *out_data, int out_len);
+
+/**
+ * @brief Find an ssl object based on a file descriptor.
+ *
+ * Goes through the list of SSL objects maintained in a client/server context
+ * to look for a file descriptor match.
+ * @param ssl_ctx [in] The client/server context.
+ * @param client_fd [in] The file descriptor.
+ * @return A reference to the SSL object. Returns null if the object could not
+ * be found.
+ */
+EXP_FUNC SSL * STDCALL ssl_find(SSL_CTX *ssl_ctx, int client_fd);
+
+/**
+ * @brief Get the session id for a handshake.
+ *
+ * This will be a 32 byte sequence and is available after the first
+ * handshaking messages are sent.
+ * @param ssl [in] An SSL object reference.
+ * @return The session id as a 32 byte sequence.
+ * @note A SSLv23 handshake may have only 16 valid bytes.
+ */
+EXP_FUNC const uint8_t * STDCALL ssl_get_session_id(const SSL *ssl);
+
+/**
+ * @brief Get the session id size for a handshake.
+ *
+ * This will normally be 32 but could be 0 (no session id) or something else.
+ * @param ssl [in] An SSL object reference.
+ * @return The size of the session id.
+ */
+EXP_FUNC uint8_t STDCALL ssl_get_session_id_size(const SSL *ssl);
+
+/**
+ * @brief Return the cipher id (in the SSL form).
+ * @param ssl [in] An SSL object reference.
+ * @return The cipher id. This will be one of the following:
+ * - SSL_AES128_SHA (0x2f)
+ * - SSL_AES256_SHA (0x35)
+ * - SSL_RC4_128_SHA (0x05)
+ * - SSL_RC4_128_MD5 (0x04)
+ */
+EXP_FUNC uint8_t STDCALL ssl_get_cipher_id(const SSL *ssl);
+
+/**
+ * @brief Return the status of the handshake.
+ * @param ssl [in] An SSL object reference.
+ * @return SSL_OK if the handshake is complete and ok.
+ * @see ssl.h for the error code list.
+ */
+EXP_FUNC int STDCALL ssl_handshake_status(const SSL *ssl);
+
+/**
+ * @brief Retrieve various parameters about the axTLS engine.
+ * @param offset [in] The configuration offset. It will be one of the following:
+ * - SSL_BUILD_MODE The build mode. This will be one of the following:
+ * - SSL_BUILD_SERVER_ONLY (basic server mode)
+ * - SSL_BUILD_ENABLE_VERIFICATION (server can do client authentication)
+ * - SSL_BUILD_ENABLE_CLIENT (client/server capabilties)
+ * - SSL_BUILD_FULL_MODE (client/server with diagnostics)
+ * - SSL_BUILD_SKELETON_MODE (skeleton mode)
+ * - SSL_MAX_CERT_CFG_OFFSET The maximum number of certificates allowed.
+ * - SSL_MAX_CA_CERT_CFG_OFFSET The maximum number of CA certificates allowed.
+ * - SSL_HAS_PEM 1 if supported
+ * @return The value of the requested parameter.
+ */
+EXP_FUNC int STDCALL ssl_get_config(int offset);
+
+/**
+ * @brief Display why the handshake failed.
+ *
+ * This call is only useful in a 'full mode' build. The output is to stdout.
+ * @param error_code [in] An error code.
+ * @see ssl.h for the error code list.
+ */
+EXP_FUNC void STDCALL ssl_display_error(int error_code);
+
+/**
+ * @brief Authenticate a received certificate.
+ *
+ * This call is usually made by a client after a handshake is complete and the
+ * context is in SSL_SERVER_VERIFY_LATER mode.
+ * @param ssl [in] An SSL object reference.
+ * @return SSL_OK if the certificate is verified.
+ */
+EXP_FUNC int STDCALL ssl_verify_cert(const SSL *ssl);
+
+/**
+ * @brief Retrieve an X.509 distinguished name component.
+ *
+ * When a handshake is complete and a certificate has been exchanged, then the
+ * details of the remote certificate can be retrieved.
+ *
+ * This will usually be used by a client to check that the server's common
+ * name matches the URL.
+ *
+ * @param ssl [in] An SSL object reference.
+ * @param component [in] one of:
+ * - SSL_X509_CERT_COMMON_NAME
+ * - SSL_X509_CERT_ORGANIZATION
+ * - SSL_X509_CERT_ORGANIZATIONAL_NAME
+ * - SSL_X509_CA_CERT_COMMON_NAME
+ * - SSL_X509_CA_CERT_ORGANIZATION
+ * - SSL_X509_CA_CERT_ORGANIZATIONAL_NAME
+ * @return The appropriate string (or null if not defined)
+ * @note Verification build mode must be enabled.
+ */
+EXP_FUNC const char * STDCALL ssl_get_cert_dn(const SSL *ssl, int component);
+
+/**
+ * @brief Retrieve a Subject Alternative DNSName
+ *
+ * When a handshake is complete and a certificate has been exchanged, then the
+ * details of the remote certificate can be retrieved.
+ *
+ * This will usually be used by a client to check that the server's DNS
+ * name matches the URL.
+ *
+ * @param ssl [in] An SSL object reference.
+ * @param dnsindex [in] The index of the DNS name to retrieve.
+ * @return The appropriate string (or null if not defined)
+ * @note Verification build mode must be enabled.
+ */
+EXP_FUNC const char * STDCALL ssl_get_cert_subject_alt_dnsname(const SSL *ssl, int dnsindex);
+
+/**
+ * @brief Force the client to perform its handshake again.
+ *
+ * For a client this involves sending another "client hello" message.
+ * For the server is means sending a "hello request" message.
+ *
+ * This is a blocking call on the client (until the handshake completes).
+ *
+ * @param ssl [in] An SSL object reference.
+ * @return SSL_OK if renegotiation instantiation was ok
+ */
+EXP_FUNC int STDCALL ssl_renegotiate(SSL *ssl);
+
+/**
+ * @brief Process a file that is in binary DER or ASCII PEM format.
+ *
+ * These are temporary objects that are used to load private keys,
+ * certificates etc into memory.
+ * @param ssl_ctx [in] The client/server context.
+ * @param obj_type [in] The format of the file. Can be one of:
+ * - SSL_OBJ_X509_CERT (no password required)
+ * - SSL_OBJ_X509_CACERT (no password required)
+ * - SSL_OBJ_RSA_KEY (AES128/AES256 PEM encryption supported)
+ * - SSL_OBJ_PKCS8 (RC4-128 encrypted data supported)
+ * - SSL_OBJ_PKCS12 (RC4-128 encrypted data supported)
+ *
+ * PEM files are automatically detected (if supported). The object type is
+ * also detected, and so is not relevant for these types of files.
+ * @param filename [in] The location of a file in DER/PEM format.
+ * @param password [in] The password used. Can be null if not required.
+ * @return SSL_OK if all ok
+ * @note Not available in skeleton build mode.
+ */
+EXP_FUNC int STDCALL ssl_obj_load(SSL_CTX *ssl_ctx, int obj_type, const char *filename, const char *password);
+
+/**
+ * @brief Process binary data.
+ *
+ * These are temporary objects that are used to load private keys,
+ * certificates etc into memory.
+ * @param ssl_ctx [in] The client/server context.
+ * @param obj_type [in] The format of the memory data.
+ * @param data [in] The binary data to be loaded.
+ * @param len [in] The amount of data to be loaded.
+ * @param password [in] The password used. Can be null if not required.
+ * @return SSL_OK if all ok
+ * @see ssl_obj_load for more details on obj_type.
+ */
+EXP_FUNC int STDCALL ssl_obj_memory_load(SSL_CTX *ssl_ctx, int obj_type, const uint8_t *data, int len, const char *password);
+
+#ifdef CONFIG_SSL_GENERATE_X509_CERT
+/**
+ * @brief Create an X.509 certificate.
+ *
+ * This certificate is a self-signed v1 cert with a fixed start/stop validity
+ * times. It is signed with an internal private key in ssl_ctx.
+ *
+ * @param ssl_ctx [in] The client/server context.
+ * @param options [in] Not used yet.
+ * @param dn [in] An array of distinguished name strings. The array is defined
+ * by:
+ * - SSL_X509_CERT_COMMON_NAME (0)
+ * - If SSL_X509_CERT_COMMON_NAME is empty or not defined, then the
+ * hostname will be used.
+ * - SSL_X509_CERT_ORGANIZATION (1)
+ * - If SSL_X509_CERT_ORGANIZATION is empty or not defined, then $USERNAME
+ * will be used.
+ * - SSL_X509_CERT_ORGANIZATIONAL_NAME (2)
+ * - SSL_X509_CERT_ORGANIZATIONAL_NAME is optional.
+ * @param cert_data [out] The certificate as a sequence of bytes.
+ * @return < 0 if an error, or the size of the certificate in bytes.
+ * @note cert_data must be freed when there is no more need for it.
+ */
+EXP_FUNC int STDCALL ssl_x509_create(SSL_CTX *ssl_ctx, uint32_t options, const char * dn[], uint8_t **cert_data);
+#endif
+
+/**
+ * @brief Return the axTLS library version as a string.
+ */
+EXP_FUNC const char * STDCALL ssl_version(void);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/axTLS/src/ssl/tls1.c b/axTLS/src/ssl/tls1.c
new file mode 100644
index 0000000..4b18365
--- /dev/null
+++ b/axTLS/src/ssl/tls1.c
@@ -0,0 +1,2195 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * Common ssl/tlsv1 code to both the client and server implementations.
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include "os_port.h"
+#include "ssl.h"
+
+/* The session expiry time */
+#define SSL_EXPIRY_TIME (CONFIG_SSL_EXPIRY_TIME*3600)
+
+static const uint8_t g_hello_request[] = { HS_HELLO_REQUEST, 0, 0, 0 };
+static const uint8_t g_chg_cipher_spec_pkt[] = { 1 };
+static const char * server_finished = "server finished";
+static const char * client_finished = "client finished";
+
+static int do_handshake(SSL *ssl, uint8_t *buf, int read_len);
+static int set_key_block(SSL *ssl, int is_write);
+static int verify_digest(SSL *ssl, int mode, const uint8_t *buf, int read_len);
+static void *crypt_new(SSL *ssl, uint8_t *key, uint8_t *iv, int is_decrypt);
+static int send_raw_packet(SSL *ssl, uint8_t protocol);
+
+/**
+ * The server will pick the cipher based on the order that the order that the
+ * ciphers are listed. This order is defined at compile time.
+ */
+#ifdef CONFIG_SSL_SKELETON_MODE
+const uint8_t ssl_prot_prefs[NUM_PROTOCOLS] =
+{ SSL_RC4_128_SHA };
+#else
+static void session_free(SSL_SESSION *ssl_sessions[], int sess_index);
+
+const uint8_t ssl_prot_prefs[NUM_PROTOCOLS] =
+#ifdef CONFIG_SSL_PROT_LOW /* low security, fast speed */
+{ SSL_RC4_128_SHA, SSL_AES128_SHA, SSL_AES256_SHA, SSL_RC4_128_MD5 };
+#elif CONFIG_SSL_PROT_MEDIUM /* medium security, medium speed */
+{ SSL_AES128_SHA, SSL_AES256_SHA, SSL_RC4_128_SHA, SSL_RC4_128_MD5 };
+#else /* CONFIG_SSL_PROT_HIGH */ /* high security, low speed */
+{ SSL_AES256_SHA, SSL_AES128_SHA, SSL_RC4_128_SHA, SSL_RC4_128_MD5 };
+#endif
+#endif /* CONFIG_SSL_SKELETON_MODE */
+
+/**
+ * The cipher map containing all the essentials for each cipher.
+ */
+#ifdef CONFIG_SSL_SKELETON_MODE
+static const cipher_info_t cipher_info[NUM_PROTOCOLS] =
+{
+ { /* RC4-SHA */
+ SSL_RC4_128_SHA, /* RC4-SHA */
+ 16, /* key size */
+ 0, /* iv size */
+ 2*(SHA1_SIZE+16), /* key block size */
+ 0, /* no padding */
+ SHA1_SIZE, /* digest size */
+ hmac_sha1, /* hmac algorithm */
+ (crypt_func)RC4_crypt, /* encrypt */
+ (crypt_func)RC4_crypt /* decrypt */
+ },
+};
+#else
+static const cipher_info_t cipher_info[NUM_PROTOCOLS] =
+{
+ { /* AES128-SHA */
+ SSL_AES128_SHA, /* AES128-SHA */
+ 16, /* key size */
+ 16, /* iv size */
+ 2*(SHA1_SIZE+16+16), /* key block size */
+ 16, /* block padding size */
+ SHA1_SIZE, /* digest size */
+ hmac_sha1, /* hmac algorithm */
+ (crypt_func)AES_cbc_encrypt, /* encrypt */
+ (crypt_func)AES_cbc_decrypt /* decrypt */
+ },
+ { /* AES256-SHA */
+ SSL_AES256_SHA, /* AES256-SHA */
+ 32, /* key size */
+ 16, /* iv size */
+ 2*(SHA1_SIZE+32+16), /* key block size */
+ 16, /* block padding size */
+ SHA1_SIZE, /* digest size */
+ hmac_sha1, /* hmac algorithm */
+ (crypt_func)AES_cbc_encrypt, /* encrypt */
+ (crypt_func)AES_cbc_decrypt /* decrypt */
+ },
+ { /* RC4-SHA */
+ SSL_RC4_128_SHA, /* RC4-SHA */
+ 16, /* key size */
+ 0, /* iv size */
+ 2*(SHA1_SIZE+16), /* key block size */
+ 0, /* no padding */
+ SHA1_SIZE, /* digest size */
+ hmac_sha1, /* hmac algorithm */
+ (crypt_func)RC4_crypt, /* encrypt */
+ (crypt_func)RC4_crypt /* decrypt */
+ },
+ /*
+ * This protocol is from SSLv2 days and is unlikely to be used - but was
+ * useful for testing different possible digest algorithms.
+ */
+ { /* RC4-MD5 */
+ SSL_RC4_128_MD5, /* RC4-MD5 */
+ 16, /* key size */
+ 0, /* iv size */
+ 2*(MD5_SIZE+16), /* key block size */
+ 0, /* no padding */
+ MD5_SIZE, /* digest size */
+ hmac_md5, /* hmac algorithm */
+ (crypt_func)RC4_crypt, /* encrypt */
+ (crypt_func)RC4_crypt /* decrypt */
+ },
+};
+#endif
+
+static void prf(const uint8_t *sec, int sec_len, uint8_t *seed, int seed_len,
+ uint8_t *out, int olen);
+static const cipher_info_t *get_cipher_info(uint8_t cipher);
+static void increment_read_sequence(SSL *ssl);
+static void increment_write_sequence(SSL *ssl);
+static void add_hmac_digest(SSL *ssl, int snd, uint8_t *hmac_header,
+ const uint8_t *buf, int buf_len, uint8_t *hmac_buf);
+
+/* win32 VC6.0 doesn't have variadic macros */
+#if defined(WIN32) && !defined(CONFIG_SSL_FULL_MODE)
+void DISPLAY_BYTES(SSL *ssl, const char *format,
+ const uint8_t *data, int size, ...) {}
+#endif
+
+/**
+ * Establish a new client/server context.
+ */
+EXP_FUNC SSL_CTX *STDCALL ssl_ctx_new(uint32_t options, int num_sessions)
+{
+ SSL_CTX *ssl_ctx = (SSL_CTX *)calloc(1, sizeof (SSL_CTX));
+ ssl_ctx->options = options;
+
+ if (load_key_certs(ssl_ctx) < 0)
+ {
+ free(ssl_ctx); /* can't load our key/certificate pair, so die */
+ return NULL;
+ }
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+ ssl_ctx->num_sessions = num_sessions;
+#endif
+
+ SSL_CTX_MUTEX_INIT(ssl_ctx->mutex);
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+ if (num_sessions)
+ {
+ ssl_ctx->ssl_sessions = (SSL_SESSION **)
+ calloc(1, num_sessions*sizeof(SSL_SESSION *));
+ }
+#endif
+
+ return ssl_ctx;
+}
+
+/*
+ * Remove a client/server context.
+ */
+EXP_FUNC void STDCALL ssl_ctx_free(SSL_CTX *ssl_ctx)
+{
+ SSL *ssl;
+ int i;
+
+ if (ssl_ctx == NULL)
+ return;
+
+ ssl = ssl_ctx->head;
+
+ /* clear out all the ssl entries */
+ while (ssl)
+ {
+ SSL *next = ssl->next;
+ ssl_free(ssl);
+ ssl = next;
+ }
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+ /* clear out all the sessions */
+ for (i = 0; i < ssl_ctx->num_sessions; i++)
+ session_free(ssl_ctx->ssl_sessions, i);
+
+ free(ssl_ctx->ssl_sessions);
+#endif
+
+ i = 0;
+ while (i < CONFIG_SSL_MAX_CERTS && ssl_ctx->certs[i].buf)
+ {
+ free(ssl_ctx->certs[i].buf);
+ ssl_ctx->certs[i++].buf = NULL;
+ }
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ remove_ca_certs(ssl_ctx->ca_cert_ctx);
+#endif
+ ssl_ctx->chain_length = 0;
+ SSL_CTX_MUTEX_DESTROY(ssl_ctx->mutex);
+ RSA_free(ssl_ctx->rsa_ctx);
+ RNG_terminate();
+ free(ssl_ctx);
+}
+
+/*
+ * Free any used resources used by this connection.
+ */
+EXP_FUNC void STDCALL ssl_free(SSL *ssl)
+{
+ SSL_CTX *ssl_ctx;
+
+ if (ssl == NULL) /* just ignore null pointers */
+ return;
+
+ /* only notify if we weren't notified first */
+ /* spec says we must notify when we are dying */
+ if (!IS_SET_SSL_FLAG(SSL_SENT_CLOSE_NOTIFY))
+ send_alert(ssl, SSL_ALERT_CLOSE_NOTIFY);
+
+ ssl_ctx = ssl->ssl_ctx;
+
+ SSL_CTX_LOCK(ssl_ctx->mutex);
+
+ /* adjust the server SSL list */
+ if (ssl->prev)
+ ssl->prev->next = ssl->next;
+ else
+ ssl_ctx->head = ssl->next;
+
+ if (ssl->next)
+ ssl->next->prev = ssl->prev;
+ else
+ ssl_ctx->tail = ssl->prev;
+
+ SSL_CTX_UNLOCK(ssl_ctx->mutex);
+
+ /* may already be free - but be sure */
+ free(ssl->encrypt_ctx);
+ free(ssl->decrypt_ctx);
+ disposable_free(ssl);
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ x509_free(ssl->x509_ctx);
+#endif
+
+ free(ssl);
+}
+
+EXP_FUNC int STDCALL ssl_handshake(SSL_CTX* ctx);
+
+/*
+ * Read the SSL connection and send any alerts for various errors.
+ */
+EXP_FUNC int STDCALL ssl_read(SSL *ssl, uint8_t **in_data)
+{
+ int ret = basic_read(ssl, in_data);
+
+ /* check for return code so we can send an alert */
+ if (ret < SSL_OK && ret != SSL_CLOSE_NOTIFY)
+ {
+ if (ret != SSL_ERROR_CONN_LOST)
+ {
+ send_alert(ssl, ret);
+#ifndef CONFIG_SSL_SKELETON_MODE
+ /* something nasty happened, so get rid of this session */
+ kill_ssl_session(ssl->ssl_ctx->ssl_sessions, ssl);
+#endif
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * Write application data to the client
+ */
+EXP_FUNC int STDCALL ssl_write(SSL *ssl, const uint8_t *out_data, int out_len)
+{
+ int n = out_len, nw, i, tot = 0;
+
+ /* maximum size of a TLS packet is around 16kB, so fragment */
+ do
+ {
+ nw = n;
+
+ if (nw > RT_MAX_PLAIN_LENGTH) /* fragment if necessary */
+ nw = RT_MAX_PLAIN_LENGTH;
+
+ if ((i = send_packet(ssl, PT_APP_PROTOCOL_DATA,
+ &out_data[tot], nw)) <= 0)
+ {
+ out_len = i; /* an error */
+ break;
+ }
+
+ tot += i;
+ n -= i;
+ } while (n > 0);
+
+ return out_len;
+}
+
+/**
+ * Add a certificate to the certificate chain.
+ */
+int add_cert(SSL_CTX *ssl_ctx, const uint8_t *buf, int len)
+{
+ int ret = SSL_ERROR_NO_CERT_DEFINED, i = 0;
+ SSL_CERT *ssl_cert;
+ X509_CTX *cert = NULL;
+ int offset;
+
+ while (ssl_ctx->certs[i].buf && i < CONFIG_SSL_MAX_CERTS)
+ i++;
+
+ if (i == CONFIG_SSL_MAX_CERTS) /* too many certs */
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: maximum number of certs added (%d) - change of "
+ "compile-time configuration required\n",
+ CONFIG_SSL_MAX_CERTS);
+#endif
+ goto error;
+ }
+
+ if ((ret = x509_new(buf, &offset, &cert)))
+ goto error;
+
+#if defined (CONFIG_SSL_FULL_MODE)
+ if (ssl_ctx->options & SSL_DISPLAY_CERTS)
+ x509_print(cert, NULL);
+#endif
+
+ ssl_cert = &ssl_ctx->certs[i];
+ ssl_cert->size = len;
+ ssl_cert->buf = (uint8_t *)malloc(len);
+ memcpy(ssl_cert->buf, buf, len);
+ ssl_ctx->chain_length++;
+ len -= offset;
+ ret = SSL_OK; /* ok so far */
+
+ /* recurse? */
+ if (len > 0)
+ {
+ ret = add_cert(ssl_ctx, &buf[offset], len);
+ }
+
+error:
+ x509_free(cert); /* don't need anymore */
+ return ret;
+}
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+/**
+ * Add a certificate authority.
+ */
+int add_cert_auth(SSL_CTX *ssl_ctx, const uint8_t *buf, int len)
+{
+ int ret = SSL_OK; /* ignore errors for now */
+ int i = 0;
+ CA_CERT_CTX *ca_cert_ctx;
+
+ if (ssl_ctx->ca_cert_ctx == NULL)
+ ssl_ctx->ca_cert_ctx = (CA_CERT_CTX *)calloc(1, sizeof(CA_CERT_CTX));
+
+ ca_cert_ctx = ssl_ctx->ca_cert_ctx;
+
+ while (i < CONFIG_X509_MAX_CA_CERTS && ca_cert_ctx->cert[i])
+ i++;
+
+ while (len > 0)
+ {
+ int offset;
+ if (i >= CONFIG_X509_MAX_CA_CERTS)
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: maximum number of CA certs added (%d) - change of "
+ "compile-time configuration required\n",
+ CONFIG_X509_MAX_CA_CERTS);
+#endif
+ break;
+ }
+
+
+ /* ignore the return code */
+ if (x509_new(buf, &offset, &ca_cert_ctx->cert[i]) == X509_OK)
+ {
+#if defined (CONFIG_SSL_FULL_MODE)
+ if (ssl_ctx->options & SSL_DISPLAY_CERTS)
+ x509_print(ca_cert_ctx->cert[i], NULL);
+#endif
+ }
+
+ i++;
+ len -= offset;
+ }
+
+ return ret;
+}
+
+/*
+ * Retrieve an X.509 distinguished name component
+ */
+EXP_FUNC const char * STDCALL ssl_get_cert_dn(const SSL *ssl, int component)
+{
+ if (ssl->x509_ctx == NULL)
+ return NULL;
+
+ switch (component)
+ {
+ case SSL_X509_CERT_COMMON_NAME:
+ return ssl->x509_ctx->cert_dn[X509_COMMON_NAME];
+
+ case SSL_X509_CERT_ORGANIZATION:
+ return ssl->x509_ctx->cert_dn[X509_ORGANIZATION];
+
+ case SSL_X509_CERT_ORGANIZATIONAL_NAME:
+ return ssl->x509_ctx->cert_dn[X509_ORGANIZATIONAL_UNIT];
+
+ case SSL_X509_CA_CERT_COMMON_NAME:
+ return ssl->x509_ctx->ca_cert_dn[X509_COMMON_NAME];
+
+ case SSL_X509_CA_CERT_ORGANIZATION:
+ return ssl->x509_ctx->ca_cert_dn[X509_ORGANIZATION];
+
+ case SSL_X509_CA_CERT_ORGANIZATIONAL_NAME:
+ return ssl->x509_ctx->ca_cert_dn[X509_ORGANIZATIONAL_UNIT];
+
+ default:
+ return NULL;
+ }
+}
+
+/*
+ * Retrieve a "Subject Alternative Name" from a v3 certificate
+ */
+EXP_FUNC const char * STDCALL ssl_get_cert_subject_alt_dnsname(const SSL *ssl,
+ int dnsindex)
+{
+ int i;
+
+ if (ssl->x509_ctx == NULL || ssl->x509_ctx->subject_alt_dnsnames == NULL)
+ return NULL;
+
+ for (i = 0; i < dnsindex; ++i)
+ {
+ if (ssl->x509_ctx->subject_alt_dnsnames[i] == NULL)
+ return NULL;
+ }
+
+ return ssl->x509_ctx->subject_alt_dnsnames[dnsindex];
+}
+
+#endif /* CONFIG_SSL_CERT_VERIFICATION */
+
+/*
+ * Find an ssl object based on the client's file descriptor.
+ */
+EXP_FUNC SSL * STDCALL ssl_find(SSL_CTX *ssl_ctx, int client_fd)
+{
+ SSL *ssl;
+
+ SSL_CTX_LOCK(ssl_ctx->mutex);
+ ssl = ssl_ctx->head;
+
+ /* search through all the ssl entries */
+ while (ssl)
+ {
+ if (ssl->client_fd == client_fd)
+ {
+ SSL_CTX_UNLOCK(ssl_ctx->mutex);
+ return ssl;
+ }
+
+ ssl = ssl->next;
+ }
+
+ SSL_CTX_UNLOCK(ssl_ctx->mutex);
+ return NULL;
+}
+
+/*
+ * Force the client to perform its handshake again.
+ */
+EXP_FUNC int STDCALL ssl_renegotiate(SSL *ssl)
+{
+ int ret = SSL_OK;
+
+ disposable_new(ssl);
+#ifdef CONFIG_SSL_ENABLE_CLIENT
+ if (IS_SET_SSL_FLAG(SSL_IS_CLIENT))
+ {
+ ret = do_client_connect(ssl);
+ }
+ else
+#endif
+ {
+ send_packet(ssl, PT_HANDSHAKE_PROTOCOL,
+ g_hello_request, sizeof(g_hello_request));
+ SET_SSL_FLAG(SSL_NEED_RECORD);
+ }
+
+ return ret;
+}
+
+/**
+ * @brief Get what we need for key info.
+ * @param cipher [in] The cipher information we are after
+ * @param key_size [out] The key size for the cipher
+ * @param iv_size [out] The iv size for the cipher
+ * @return The amount of key information we need.
+ */
+static const cipher_info_t *get_cipher_info(uint8_t cipher)
+{
+ int i;
+
+ for (i = 0; i < NUM_PROTOCOLS; i++)
+ {
+ if (cipher_info[i].cipher == cipher)
+ {
+ return &cipher_info[i];
+ }
+ }
+
+ return NULL; /* error */
+}
+
+/*
+ * Get a new ssl context for a new connection.
+ */
+SSL *ssl_new(SSL_CTX *ssl_ctx, int client_fd)
+{
+ SSL *ssl = (SSL *)calloc(1, sizeof(SSL));
+ ssl->ssl_ctx = ssl_ctx;
+ ssl->need_bytes = SSL_RECORD_SIZE; /* need a record */
+ ssl->client_fd = client_fd;
+ ssl->flag = SSL_NEED_RECORD;
+ ssl->bm_data = ssl->bm_all_data+BM_RECORD_OFFSET; /* space at the start */
+ ssl->hs_status = SSL_NOT_OK; /* not connected */
+#ifdef CONFIG_ENABLE_VERIFICATION
+ ssl->ca_cert_ctx = ssl_ctx->ca_cert_ctx;
+#endif
+ disposable_new(ssl);
+
+ /* a bit hacky but saves a few bytes of memory */
+ ssl->flag |= ssl_ctx->options;
+ SSL_CTX_LOCK(ssl_ctx->mutex);
+
+ if (ssl_ctx->head == NULL)
+ {
+ ssl_ctx->head = ssl;
+ ssl_ctx->tail = ssl;
+ }
+ else
+ {
+ ssl->prev = ssl_ctx->tail;
+ ssl_ctx->tail->next = ssl;
+ ssl_ctx->tail = ssl;
+ }
+
+ SSL_CTX_UNLOCK(ssl_ctx->mutex);
+ return ssl;
+}
+
+/*
+ * Add a private key to a context.
+ */
+int add_private_key(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj)
+{
+ int ret = SSL_OK;
+
+ /* get the private key details */
+ if (asn1_get_private_key(ssl_obj->buf, ssl_obj->len, &ssl_ctx->rsa_ctx))
+ {
+ ret = SSL_ERROR_INVALID_KEY;
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/**
+ * Increment the read sequence number (as a 64 bit endian indepenent #)
+ */
+static void increment_read_sequence(SSL *ssl)
+{
+ int i;
+
+ for (i = 7; i >= 0; i--)
+ {
+ if (++ssl->read_sequence[i])
+ break;
+ }
+}
+
+/**
+ * Increment the read sequence number (as a 64 bit endian indepenent #)
+ */
+static void increment_write_sequence(SSL *ssl)
+{
+ int i;
+
+ for (i = 7; i >= 0; i--)
+ {
+ if (++ssl->write_sequence[i])
+ break;
+ }
+}
+
+/**
+ * Work out the HMAC digest in a packet.
+ */
+static void add_hmac_digest(SSL *ssl, int mode, uint8_t *hmac_header,
+ const uint8_t *buf, int buf_len, uint8_t *hmac_buf)
+{
+ int hmac_len = buf_len + 8 + SSL_RECORD_SIZE;
+ uint8_t *t_buf = (uint8_t *)alloca(hmac_len+10);
+
+ memcpy(t_buf, (mode == SSL_SERVER_WRITE || mode == SSL_CLIENT_WRITE) ?
+ ssl->write_sequence : ssl->read_sequence, 8);
+ memcpy(&t_buf[8], hmac_header, SSL_RECORD_SIZE);
+ memcpy(&t_buf[8+SSL_RECORD_SIZE], buf, buf_len);
+
+ ssl->cipher_info->hmac(t_buf, hmac_len,
+ (mode == SSL_SERVER_WRITE || mode == SSL_CLIENT_READ) ?
+ ssl->server_mac : ssl->client_mac,
+ ssl->cipher_info->digest_size, hmac_buf);
+
+#if 0
+ print_blob("record", ssl->hmac_tx, SSL_RECORD_SIZE);
+ print_blob("buf", buf, buf_len);
+ if (mode == SSL_SERVER_WRITE || mode == SSL_CLIENT_WRITE)
+ {
+ print_blob("write seq", ssl->write_sequence, 8);
+ }
+ else
+ {
+ print_blob("read seq", ssl->read_sequence, 8);
+ }
+
+ if (mode == SSL_SERVER_WRITE || mode == SSL_CLIENT_READ)
+ {
+ print_blob("server mac",
+ ssl->server_mac, ssl->cipher_info->digest_size);
+ }
+ else
+ {
+ print_blob("client mac",
+ ssl->client_mac, ssl->cipher_info->digest_size);
+ }
+ print_blob("hmac", hmac_buf, SHA1_SIZE);
+#endif
+}
+
+/**
+ * Verify that the digest of a packet is correct.
+ */
+static int verify_digest(SSL *ssl, int mode, const uint8_t *buf, int read_len)
+{
+ uint8_t hmac_buf[SHA1_SIZE];
+ int hmac_offset;
+
+ if (ssl->cipher_info->padding_size)
+ {
+ int last_blk_size = buf[read_len-1], i;
+ hmac_offset = read_len-last_blk_size-ssl->cipher_info->digest_size-1;
+
+ /* guard against a timing attack - make sure we do the digest */
+ if (hmac_offset < 0)
+ {
+ hmac_offset = 0;
+ }
+ else
+ {
+ /* already looked at last byte */
+ for (i = 1; i < last_blk_size; i++)
+ {
+ if (buf[read_len-i] != last_blk_size)
+ {
+ hmac_offset = 0;
+ break;
+ }
+ }
+ }
+ }
+ else /* stream cipher */
+ {
+ hmac_offset = read_len - ssl->cipher_info->digest_size;
+
+ if (hmac_offset < 0)
+ {
+ hmac_offset = 0;
+ }
+ }
+
+ /* sanity check the offset */
+ ssl->hmac_header[3] = hmac_offset >> 8; /* insert size */
+ ssl->hmac_header[4] = hmac_offset & 0xff;
+ add_hmac_digest(ssl, mode, ssl->hmac_header, buf, hmac_offset, hmac_buf);
+
+ if (memcmp(hmac_buf, &buf[hmac_offset], ssl->cipher_info->digest_size))
+ {
+ return SSL_ERROR_INVALID_HMAC;
+ }
+
+ return hmac_offset;
+}
+
+/**
+ * Add a packet to the end of our sent and received packets, so that we may use
+ * it to calculate the hash at the end.
+ */
+void add_packet(SSL *ssl, const uint8_t *pkt, int len)
+{
+ MD5_Update(&ssl->dc->md5_ctx, pkt, len);
+ SHA1_Update(&ssl->dc->sha1_ctx, pkt, len);
+}
+
+/**
+ * Work out the MD5 PRF.
+ */
+static void p_hash_md5(const uint8_t *sec, int sec_len,
+ uint8_t *seed, int seed_len, uint8_t *out, int olen)
+{
+ uint8_t a1[128];
+
+ /* A(1) */
+ hmac_md5(seed, seed_len, sec, sec_len, a1);
+ memcpy(&a1[MD5_SIZE], seed, seed_len);
+ hmac_md5(a1, MD5_SIZE+seed_len, sec, sec_len, out);
+
+ while (olen > MD5_SIZE)
+ {
+ uint8_t a2[MD5_SIZE];
+ out += MD5_SIZE;
+ olen -= MD5_SIZE;
+
+ /* A(N) */
+ hmac_md5(a1, MD5_SIZE, sec, sec_len, a2);
+ memcpy(a1, a2, MD5_SIZE);
+
+ /* work out the actual hash */
+ hmac_md5(a1, MD5_SIZE+seed_len, sec, sec_len, out);
+ }
+}
+
+/**
+ * Work out the SHA1 PRF.
+ */
+static void p_hash_sha1(const uint8_t *sec, int sec_len,
+ uint8_t *seed, int seed_len, uint8_t *out, int olen)
+{
+ uint8_t a1[128];
+
+ /* A(1) */
+ hmac_sha1(seed, seed_len, sec, sec_len, a1);
+ memcpy(&a1[SHA1_SIZE], seed, seed_len);
+ hmac_sha1(a1, SHA1_SIZE+seed_len, sec, sec_len, out);
+
+ while (olen > SHA1_SIZE)
+ {
+ uint8_t a2[SHA1_SIZE];
+ out += SHA1_SIZE;
+ olen -= SHA1_SIZE;
+
+ /* A(N) */
+ hmac_sha1(a1, SHA1_SIZE, sec, sec_len, a2);
+ memcpy(a1, a2, SHA1_SIZE);
+
+ /* work out the actual hash */
+ hmac_sha1(a1, SHA1_SIZE+seed_len, sec, sec_len, out);
+ }
+}
+
+/**
+ * Work out the PRF.
+ */
+static void prf(const uint8_t *sec, int sec_len, uint8_t *seed, int seed_len,
+ uint8_t *out, int olen)
+{
+ int len, i;
+ const uint8_t *S1, *S2;
+ uint8_t xbuf[256]; /* needs to be > the amount of key data */
+ uint8_t ybuf[256]; /* needs to be > the amount of key data */
+
+ len = sec_len/2;
+ S1 = sec;
+ S2 = &sec[len];
+ len += (sec_len & 1); /* add for odd, make longer */
+
+ p_hash_md5(S1, len, seed, seed_len, xbuf, olen);
+ p_hash_sha1(S2, len, seed, seed_len, ybuf, olen);
+
+ for (i = 0; i < olen; i++)
+ out[i] = xbuf[i] ^ ybuf[i];
+}
+
+/**
+ * Generate a master secret based on the client/server random data and the
+ * premaster secret.
+ */
+void generate_master_secret(SSL *ssl, const uint8_t *premaster_secret)
+{
+ uint8_t buf[128]; /* needs to be > 13+32+32 in size */
+ strcpy((char *)buf, "master secret");
+ memcpy(&buf[13], ssl->dc->client_random, SSL_RANDOM_SIZE);
+ memcpy(&buf[45], ssl->dc->server_random, SSL_RANDOM_SIZE);
+ prf(premaster_secret, SSL_SECRET_SIZE, buf, 77, ssl->dc->master_secret,
+ SSL_SECRET_SIZE);
+}
+
+/**
+ * Generate a 'random' blob of data used for the generation of keys.
+ */
+static void generate_key_block(uint8_t *client_random, uint8_t *server_random,
+ uint8_t *master_secret, uint8_t *key_block, int key_block_size)
+{
+ uint8_t buf[128];
+ strcpy((char *)buf, "key expansion");
+ memcpy(&buf[13], server_random, SSL_RANDOM_SIZE);
+ memcpy(&buf[45], client_random, SSL_RANDOM_SIZE);
+ prf(master_secret, SSL_SECRET_SIZE, buf, 77, key_block, key_block_size);
+}
+
+/**
+ * Calculate the digest used in the finished message. This function also
+ * doubles up as a certificate verify function.
+ */
+void finished_digest(SSL *ssl, const char *label, uint8_t *digest)
+{
+ uint8_t mac_buf[128];
+ uint8_t *q = mac_buf;
+ MD5_CTX md5_ctx = ssl->dc->md5_ctx;
+ SHA1_CTX sha1_ctx = ssl->dc->sha1_ctx;
+
+ if (label)
+ {
+ strcpy((char *)q, label);
+ q += strlen(label);
+ }
+
+ MD5_Final(q, &md5_ctx);
+ q += MD5_SIZE;
+
+ SHA1_Final(q, &sha1_ctx);
+ q += SHA1_SIZE;
+
+ if (label)
+ {
+ prf(ssl->dc->master_secret, SSL_SECRET_SIZE, mac_buf, (int)(q-mac_buf),
+ digest, SSL_FINISHED_HASH_SIZE);
+ }
+ else /* for use in a certificate verify */
+ {
+ memcpy(digest, mac_buf, MD5_SIZE + SHA1_SIZE);
+ }
+
+#if 0
+ printf("label: %s\n", label);
+ print_blob("master secret", ssl->dc->master_secret, 48);
+ print_blob("mac_buf", mac_buf, q-mac_buf);
+ print_blob("finished digest", digest, SSL_FINISHED_HASH_SIZE);
+#endif
+}
+
+/**
+ * Retrieve (and initialise) the context of a cipher.
+ */
+static void *crypt_new(SSL *ssl, uint8_t *key, uint8_t *iv, int is_decrypt)
+{
+ switch (ssl->cipher)
+ {
+#ifndef CONFIG_SSL_SKELETON_MODE
+ case SSL_AES128_SHA:
+ {
+ AES_CTX *aes_ctx = (AES_CTX *)malloc(sizeof(AES_CTX));
+ AES_set_key(aes_ctx, key, iv, AES_MODE_128);
+
+ if (is_decrypt)
+ {
+ AES_convert_key(aes_ctx);
+ }
+
+ return (void *)aes_ctx;
+ }
+
+ case SSL_AES256_SHA:
+ {
+ AES_CTX *aes_ctx = (AES_CTX *)malloc(sizeof(AES_CTX));
+ AES_set_key(aes_ctx, key, iv, AES_MODE_256);
+
+ if (is_decrypt)
+ {
+ AES_convert_key(aes_ctx);
+ }
+
+ return (void *)aes_ctx;
+ }
+
+ case SSL_RC4_128_MD5:
+#endif
+ case SSL_RC4_128_SHA:
+ {
+ RC4_CTX *rc4_ctx = (RC4_CTX *)malloc(sizeof(RC4_CTX));
+ RC4_setup(rc4_ctx, key, 16);
+ return (void *)rc4_ctx;
+ }
+ }
+
+ return NULL; /* its all gone wrong */
+}
+
+/**
+ * Send a packet over the socket.
+ */
+static int send_raw_packet(SSL *ssl, uint8_t protocol)
+{
+ uint8_t *rec_buf = ssl->bm_all_data;
+ int pkt_size = SSL_RECORD_SIZE+ssl->bm_index;
+ int sent = 0;
+ int ret = SSL_OK;
+
+ rec_buf[0] = protocol;
+ rec_buf[1] = 0x03; /* version = 3.1 or higher */
+ rec_buf[2] = ssl->version & 0x0f;
+ rec_buf[3] = ssl->bm_index >> 8;
+ rec_buf[4] = ssl->bm_index & 0xff;
+
+ DISPLAY_BYTES(ssl, "sending %d bytes", ssl->bm_all_data,
+ pkt_size, pkt_size);
+
+ while (sent < pkt_size)
+ {
+ ret = SOCKET_WRITE(ssl->client_fd,
+ &ssl->bm_all_data[sent], pkt_size-sent);
+
+ if (ret >= 0)
+ sent += ret;
+ else
+ {
+
+#ifdef WIN32
+ if (GetLastError() != WSAEWOULDBLOCK)
+#else
+ if (errno != EAGAIN && errno != EWOULDBLOCK)
+#endif
+ return SSL_ERROR_CONN_LOST;
+ }
+
+ /* keep going until the write buffer has some space */
+ if (sent != pkt_size)
+ {
+ fd_set wfds;
+ FD_ZERO(&wfds);
+ FD_SET(ssl->client_fd, &wfds);
+
+ /* block and wait for it */
+ if (select(ssl->client_fd + 1, NULL, &wfds, NULL, NULL) < 0)
+ return SSL_ERROR_CONN_LOST;
+ }
+ }
+
+ SET_SSL_FLAG(SSL_NEED_RECORD); /* reset for next time */
+ ssl->bm_index = 0;
+
+ if (protocol != PT_APP_PROTOCOL_DATA)
+ {
+ /* always return SSL_OK during handshake */
+ ret = SSL_OK;
+ }
+
+ return ret;
+}
+
+/**
+ * Send an encrypted packet with padding bytes if necessary.
+ */
+int send_packet(SSL *ssl, uint8_t protocol, const uint8_t *in, int length)
+{
+ int ret, msg_length = 0;
+
+ /* if our state is bad, don't bother */
+ if (ssl->hs_status == SSL_ERROR_DEAD)
+ return SSL_ERROR_CONN_LOST;
+
+ if (in) /* has the buffer already been initialised? */
+ {
+ memcpy(ssl->bm_data, in, length);
+ }
+
+ msg_length += length;
+
+ if (IS_SET_SSL_FLAG(SSL_TX_ENCRYPTED))
+ {
+ int mode = IS_SET_SSL_FLAG(SSL_IS_CLIENT) ?
+ SSL_CLIENT_WRITE : SSL_SERVER_WRITE;
+ uint8_t hmac_header[SSL_RECORD_SIZE] =
+ {
+ protocol,
+ 0x03, /* version = 3.1 or higher */
+ ssl->version & 0x0f,
+ msg_length >> 8,
+ msg_length & 0xff
+ };
+
+ if (protocol == PT_HANDSHAKE_PROTOCOL)
+ {
+ DISPLAY_STATE(ssl, 1, ssl->bm_data[0], 0);
+
+ if (ssl->bm_data[0] != HS_HELLO_REQUEST)
+ {
+ add_packet(ssl, ssl->bm_data, msg_length);
+ }
+ }
+
+ /* add the packet digest */
+ add_hmac_digest(ssl, mode, hmac_header, ssl->bm_data, msg_length,
+ &ssl->bm_data[msg_length]);
+ msg_length += ssl->cipher_info->digest_size;
+
+ /* add padding? */
+ if (ssl->cipher_info->padding_size)
+ {
+ int last_blk_size = msg_length%ssl->cipher_info->padding_size;
+ int pad_bytes = ssl->cipher_info->padding_size - last_blk_size;
+
+ /* ensure we always have at least 1 padding byte */
+ if (pad_bytes == 0)
+ pad_bytes += ssl->cipher_info->padding_size;
+
+ memset(&ssl->bm_data[msg_length], pad_bytes-1, pad_bytes);
+ msg_length += pad_bytes;
+ }
+
+ DISPLAY_BYTES(ssl, "unencrypted write", ssl->bm_data, msg_length);
+ increment_write_sequence(ssl);
+
+ /* add the explicit IV for TLS1.1 */
+ if (ssl->version >= SSL_PROTOCOL_VERSION1_1 &&
+ ssl->cipher_info->iv_size)
+
+ {
+ uint8_t iv_size = ssl->cipher_info->iv_size;
+ uint8_t *t_buf = alloca(msg_length + iv_size);
+ memcpy(t_buf + iv_size, ssl->bm_data, msg_length);
+ get_random(iv_size, t_buf);
+ msg_length += iv_size;
+ memcpy(ssl->bm_data, t_buf, msg_length);
+ }
+
+ /* now encrypt the packet */
+ ssl->cipher_info->encrypt(ssl->encrypt_ctx, ssl->bm_data,
+ ssl->bm_data, msg_length);
+ }
+ else if (protocol == PT_HANDSHAKE_PROTOCOL)
+ {
+ DISPLAY_STATE(ssl, 1, ssl->bm_data[0], 0);
+
+ if (ssl->bm_data[0] != HS_HELLO_REQUEST)
+ {
+ add_packet(ssl, ssl->bm_data, length);
+ }
+ }
+
+ ssl->bm_index = msg_length;
+ if ((ret = send_raw_packet(ssl, protocol)) <= 0)
+ return ret;
+
+ return length; /* just return what we wanted to send */
+}
+
+/**
+ * Work out the cipher keys we are going to use for this session based on the
+ * master secret.
+ */
+static int set_key_block(SSL *ssl, int is_write)
+{
+ const cipher_info_t *ciph_info = get_cipher_info(ssl->cipher);
+ uint8_t *q;
+ uint8_t client_key[32], server_key[32]; /* big enough for AES256 */
+ uint8_t client_iv[16], server_iv[16]; /* big enough for AES128/256 */
+ int is_client = IS_SET_SSL_FLAG(SSL_IS_CLIENT);
+
+ if (ciph_info == NULL)
+ return -1;
+
+ /* only do once in a handshake */
+ if (ssl->dc->key_block == NULL)
+ {
+ ssl->dc->key_block = (uint8_t *)malloc(ciph_info->key_block_size);
+
+#if 0
+ print_blob("client", ssl->dc->client_random, 32);
+ print_blob("server", ssl->dc->server_random, 32);
+ print_blob("master", ssl->dc->master_secret, SSL_SECRET_SIZE);
+#endif
+ generate_key_block(ssl->dc->client_random, ssl->dc->server_random,
+ ssl->dc->master_secret, ssl->dc->key_block,
+ ciph_info->key_block_size);
+#if 0
+ print_blob("keyblock", ssl->key_block, ciph_info->key_block_size);
+#endif
+ }
+
+ q = ssl->dc->key_block;
+
+ if ((is_client && is_write) || (!is_client && !is_write))
+ {
+ memcpy(ssl->client_mac, q, ciph_info->digest_size);
+ }
+
+ q += ciph_info->digest_size;
+
+ if ((!is_client && is_write) || (is_client && !is_write))
+ {
+ memcpy(ssl->server_mac, q, ciph_info->digest_size);
+ }
+
+ q += ciph_info->digest_size;
+ memcpy(client_key, q, ciph_info->key_size);
+ q += ciph_info->key_size;
+ memcpy(server_key, q, ciph_info->key_size);
+ q += ciph_info->key_size;
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+ if (ciph_info->iv_size) /* RC4 has no IV, AES does */
+ {
+ memcpy(client_iv, q, ciph_info->iv_size);
+ q += ciph_info->iv_size;
+ memcpy(server_iv, q, ciph_info->iv_size);
+ q += ciph_info->iv_size;
+ }
+#endif
+
+ free(is_write ? ssl->encrypt_ctx : ssl->decrypt_ctx);
+
+ /* now initialise the ciphers */
+ if (is_client)
+ {
+ finished_digest(ssl, server_finished, ssl->dc->final_finish_mac);
+
+ if (is_write)
+ ssl->encrypt_ctx = crypt_new(ssl, client_key, client_iv, 0);
+ else
+ ssl->decrypt_ctx = crypt_new(ssl, server_key, server_iv, 1);
+ }
+ else
+ {
+ finished_digest(ssl, client_finished, ssl->dc->final_finish_mac);
+
+ if (is_write)
+ ssl->encrypt_ctx = crypt_new(ssl, server_key, server_iv, 0);
+ else
+ ssl->decrypt_ctx = crypt_new(ssl, client_key, client_iv, 1);
+ }
+
+ ssl->cipher_info = ciph_info;
+ return 0;
+}
+
+/**
+ * Read the SSL connection.
+ */
+int basic_read(SSL *ssl, uint8_t **in_data)
+{
+ int ret = SSL_OK;
+ int read_len, is_client = IS_SET_SSL_FLAG(SSL_IS_CLIENT);
+ uint8_t *buf = ssl->bm_data;
+
+ read_len = SOCKET_READ(ssl->client_fd, &buf[ssl->bm_read_index],
+ ssl->need_bytes-ssl->got_bytes);
+
+ if (read_len < 0)
+ {
+#ifdef WIN32
+ if (GetLastError() == WSAEWOULDBLOCK)
+#else
+ if (errno == EAGAIN || errno == EWOULDBLOCK)
+#endif
+ return 0;
+ }
+
+ /* connection has gone, so die */
+ if (read_len <= 0)
+ {
+ ret = SSL_ERROR_CONN_LOST;
+ ssl->hs_status = SSL_ERROR_DEAD; /* make sure it stays dead */
+ goto error;
+ }
+
+ DISPLAY_BYTES(ssl, "received %d bytes",
+ &ssl->bm_data[ssl->bm_read_index], read_len, read_len);
+
+ ssl->got_bytes += read_len;
+ ssl->bm_read_index += read_len;
+
+ /* haven't quite got what we want, so try again later */
+ if (ssl->got_bytes < ssl->need_bytes)
+ return SSL_OK;
+
+ read_len = ssl->got_bytes;
+ ssl->got_bytes = 0;
+
+ if (IS_SET_SSL_FLAG(SSL_NEED_RECORD))
+ {
+ /* check for sslv2 "client hello" */
+ if (buf[0] & 0x80 && buf[2] == 1)
+ {
+#ifdef CONFIG_SSL_ENABLE_V23_HANDSHAKE
+ uint8_t version = (buf[3] << 4) + buf[4];
+ DISPLAY_BYTES(ssl, "ssl2 record", buf, 5);
+
+ /* should be v3.1 (TLSv1) or better */
+ ssl->version = ssl->client_version = version;
+
+ if (version > SSL_PROTOCOL_VERSION_MAX)
+ {
+ /* use client's version */
+ ssl->version = SSL_PROTOCOL_VERSION_MAX;
+ }
+ else if (version < SSL_PROTOCOL_MIN_VERSION)
+ {
+ ret = SSL_ERROR_INVALID_VERSION;
+ ssl_display_error(ret);
+ return ret;
+ }
+
+ add_packet(ssl, &buf[2], 3);
+ ret = process_sslv23_client_hello(ssl);
+#else
+ printf("Error: no SSLv23 handshaking allowed\n"); TTY_FLUSH();
+ ret = SSL_ERROR_NOT_SUPPORTED;
+#endif
+ goto error; /* not an error - just get out of here */
+ }
+
+ ssl->need_bytes = (buf[3] << 8) + buf[4];
+
+ /* do we violate the spec with the message size? */
+ if (ssl->need_bytes > RT_MAX_PLAIN_LENGTH+RT_EXTRA-BM_RECORD_OFFSET)
+ {
+ ret = SSL_ERROR_INVALID_PROT_MSG;
+ goto error;
+ }
+
+ CLR_SSL_FLAG(SSL_NEED_RECORD);
+ memcpy(ssl->hmac_header, buf, 3); /* store for hmac */
+ ssl->record_type = buf[0];
+ goto error; /* no error, we're done */
+ }
+
+ /* for next time - just do it now in case of an error */
+ SET_SSL_FLAG(SSL_NEED_RECORD);
+ ssl->need_bytes = SSL_RECORD_SIZE;
+
+ /* decrypt if we need to */
+ if (IS_SET_SSL_FLAG(SSL_RX_ENCRYPTED))
+ {
+ ssl->cipher_info->decrypt(ssl->decrypt_ctx, buf, buf, read_len);
+
+ if (ssl->version >= SSL_PROTOCOL_VERSION1_1 &&
+ ssl->cipher_info->iv_size)
+ {
+ buf += ssl->cipher_info->iv_size;
+ read_len -= ssl->cipher_info->iv_size;
+ }
+
+ read_len = verify_digest(ssl,
+ is_client ? SSL_CLIENT_READ : SSL_SERVER_READ, buf, read_len);
+
+ /* does the hmac work? */
+ if (read_len < 0)
+ {
+ ret = read_len;
+ goto error;
+ }
+
+ DISPLAY_BYTES(ssl, "decrypted", buf, read_len);
+ increment_read_sequence(ssl);
+ }
+
+ /* The main part of the SSL packet */
+ switch (ssl->record_type)
+ {
+ case PT_HANDSHAKE_PROTOCOL:
+ if (ssl->dc != NULL)
+ {
+ ssl->dc->bm_proc_index = 0;
+ ret = do_handshake(ssl, buf, read_len);
+ }
+ else /* no client renegotiation allowed */
+ {
+ ret = SSL_ERROR_NO_CLIENT_RENOG;
+ goto error;
+ }
+ break;
+
+ case PT_CHANGE_CIPHER_SPEC:
+ if (ssl->next_state != HS_FINISHED)
+ {
+ ret = SSL_ERROR_INVALID_HANDSHAKE;
+ goto error;
+ }
+
+ /* all encrypted from now on */
+ SET_SSL_FLAG(SSL_RX_ENCRYPTED);
+ if (set_key_block(ssl, 0) < 0)
+ {
+ ret = SSL_ERROR_INVALID_HANDSHAKE;
+ goto error;
+ }
+
+ memset(ssl->read_sequence, 0, 8);
+ break;
+
+ case PT_APP_PROTOCOL_DATA:
+ if (in_data)
+ {
+ *in_data = buf; /* point to the work buffer */
+ (*in_data)[read_len] = 0; /* null terminate just in case */
+ }
+
+ ret = read_len;
+ break;
+
+ case PT_ALERT_PROTOCOL:
+ /* return the alert # with alert bit set */
+ if(buf[0] == SSL_ALERT_TYPE_WARNING &&
+ buf[1] == SSL_ALERT_CLOSE_NOTIFY)
+ {
+ ret = SSL_CLOSE_NOTIFY;
+ send_alert(ssl, SSL_ALERT_CLOSE_NOTIFY);
+ SET_SSL_FLAG(SSL_SENT_CLOSE_NOTIFY);
+ }
+ else
+ {
+ ret = -buf[1];
+ DISPLAY_ALERT(ssl, buf[1]);
+ }
+
+ break;
+
+ default:
+ ret = SSL_ERROR_INVALID_PROT_MSG;
+ break;
+ }
+
+error:
+ ssl->bm_read_index = 0; /* reset to go again */
+
+ if (ret < SSL_OK && in_data)/* if all wrong, then clear this buffer ptr */
+ *in_data = NULL;
+
+ return ret;
+}
+
+/**
+ * Do some basic checking of data and then perform the appropriate handshaking.
+ */
+static int do_handshake(SSL *ssl, uint8_t *buf, int read_len)
+{
+ int hs_len = (buf[2]<<8) + buf[3];
+ uint8_t handshake_type = buf[0];
+ int ret = SSL_OK;
+ int is_client = IS_SET_SSL_FLAG(SSL_IS_CLIENT);
+
+ /* some integrity checking on the handshake */
+ PARANOIA_CHECK(read_len-SSL_HS_HDR_SIZE, hs_len);
+
+ if (handshake_type != ssl->next_state)
+ {
+ /* handle a special case on the client */
+ if (!is_client || handshake_type != HS_CERT_REQ ||
+ ssl->next_state != HS_SERVER_HELLO_DONE)
+ {
+ ret = SSL_ERROR_INVALID_HANDSHAKE;
+ goto error;
+ }
+ }
+
+ hs_len += SSL_HS_HDR_SIZE; /* adjust for when adding packets */
+ ssl->bm_index = hs_len; /* store the size and check later */
+ DISPLAY_STATE(ssl, 0, handshake_type, 0);
+
+ if (handshake_type != HS_CERT_VERIFY && handshake_type != HS_HELLO_REQUEST)
+ add_packet(ssl, buf, hs_len);
+
+#if defined(CONFIG_SSL_ENABLE_CLIENT)
+ ret = is_client ?
+ do_clnt_handshake(ssl, handshake_type, buf, hs_len) :
+ do_svr_handshake(ssl, handshake_type, buf, hs_len);
+#else
+ ret = do_svr_handshake(ssl, handshake_type, buf, hs_len);
+#endif
+
+ /* just use recursion to get the rest */
+ if (hs_len < read_len && ret == SSL_OK)
+ ret = do_handshake(ssl, &buf[hs_len], read_len-hs_len);
+
+error:
+ return ret;
+}
+
+/**
+ * Sends the change cipher spec message. We have just read a finished message
+ * from the client.
+ */
+int send_change_cipher_spec(SSL *ssl)
+{
+ int ret = send_packet(ssl, PT_CHANGE_CIPHER_SPEC,
+ g_chg_cipher_spec_pkt, sizeof(g_chg_cipher_spec_pkt));
+ SET_SSL_FLAG(SSL_TX_ENCRYPTED);
+
+ if (ret >= 0 && set_key_block(ssl, 1) < 0)
+ ret = SSL_ERROR_INVALID_HANDSHAKE;
+
+ memset(ssl->write_sequence, 0, 8);
+ return ret;
+}
+
+/**
+ * Send a "finished" message
+ */
+int send_finished(SSL *ssl)
+{
+ uint8_t buf[SSL_FINISHED_HASH_SIZE+4] = {
+ HS_FINISHED, 0, 0, SSL_FINISHED_HASH_SIZE };
+
+ /* now add the finished digest mac (12 bytes) */
+ finished_digest(ssl,
+ IS_SET_SSL_FLAG(SSL_IS_CLIENT) ?
+ client_finished : server_finished, &buf[4]);
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+ /* store in the session cache */
+ if (!IS_SET_SSL_FLAG(SSL_SESSION_RESUME) && ssl->ssl_ctx->num_sessions)
+ {
+ memcpy(ssl->session->master_secret,
+ ssl->dc->master_secret, SSL_SECRET_SIZE);
+ }
+#endif
+
+ return send_packet(ssl, PT_HANDSHAKE_PROTOCOL,
+ buf, SSL_FINISHED_HASH_SIZE+4);
+}
+
+/**
+ * Send an alert message.
+ * Return 1 if the alert was an "error".
+ */
+int send_alert(SSL *ssl, int error_code)
+{
+ int alert_num = 0;
+ int is_warning = 0;
+ uint8_t buf[2];
+
+ /* Don't bother we're already dead */
+ if (ssl->hs_status == SSL_ERROR_DEAD)
+ {
+ return SSL_ERROR_CONN_LOST;
+ }
+
+#ifdef CONFIG_SSL_FULL_MODE
+ if (IS_SET_SSL_FLAG(SSL_DISPLAY_STATES))
+ ssl_display_error(error_code);
+#endif
+
+ switch (error_code)
+ {
+ case SSL_ALERT_CLOSE_NOTIFY:
+ is_warning = 1;
+ alert_num = SSL_ALERT_CLOSE_NOTIFY;
+ break;
+
+ case SSL_ERROR_CONN_LOST: /* don't send alert just yet */
+ is_warning = 1;
+ break;
+
+ case SSL_ERROR_INVALID_HANDSHAKE:
+ case SSL_ERROR_INVALID_PROT_MSG:
+ alert_num = SSL_ALERT_HANDSHAKE_FAILURE;
+ break;
+
+ case SSL_ERROR_INVALID_HMAC:
+ case SSL_ERROR_FINISHED_INVALID:
+ alert_num = SSL_ALERT_BAD_RECORD_MAC;
+ break;
+
+ case SSL_ERROR_INVALID_VERSION:
+ alert_num = SSL_ALERT_INVALID_VERSION;
+ break;
+
+ case SSL_ERROR_INVALID_SESSION:
+ case SSL_ERROR_NO_CIPHER:
+ case SSL_ERROR_INVALID_KEY:
+ alert_num = SSL_ALERT_ILLEGAL_PARAMETER;
+ break;
+
+ case SSL_ERROR_BAD_CERTIFICATE:
+ alert_num = SSL_ALERT_BAD_CERTIFICATE;
+ break;
+
+ case SSL_ERROR_NO_CLIENT_RENOG:
+ alert_num = SSL_ALERT_NO_RENEGOTIATION;
+ break;
+
+ default:
+ /* a catch-all for any badly verified certificates */
+ alert_num = (error_code <= SSL_X509_OFFSET) ?
+ SSL_ALERT_BAD_CERTIFICATE : SSL_ALERT_UNEXPECTED_MESSAGE;
+ break;
+ }
+
+ buf[0] = is_warning ? 1 : 2;
+ buf[1] = alert_num;
+ send_packet(ssl, PT_ALERT_PROTOCOL, buf, sizeof(buf));
+ DISPLAY_ALERT(ssl, alert_num);
+ return is_warning ? 0 : 1;
+}
+
+/**
+ * Process a client finished message.
+ */
+int process_finished(SSL *ssl, uint8_t *buf, int hs_len)
+{
+ int ret = SSL_OK;
+ int is_client = IS_SET_SSL_FLAG(SSL_IS_CLIENT);
+ int resume = IS_SET_SSL_FLAG(SSL_SESSION_RESUME);
+
+ PARANOIA_CHECK(ssl->bm_index, SSL_FINISHED_HASH_SIZE+4);
+
+ /* check that we all work before we continue */
+ if (memcmp(ssl->dc->final_finish_mac, &buf[4], SSL_FINISHED_HASH_SIZE))
+ return SSL_ERROR_FINISHED_INVALID;
+
+ if ((!is_client && !resume) || (is_client && resume))
+ {
+ if ((ret = send_change_cipher_spec(ssl)) == SSL_OK)
+ ret = send_finished(ssl);
+ }
+
+ /* if we ever renegotiate */
+ ssl->next_state = is_client ? HS_HELLO_REQUEST : HS_CLIENT_HELLO;
+ ssl->hs_status = ret; /* set the final handshake status */
+
+error:
+ return ret;
+}
+
+/**
+ * Send a certificate.
+ */
+int send_certificate(SSL *ssl)
+{
+ int i = 0;
+ uint8_t *buf = ssl->bm_data;
+ int offset = 7;
+ int chain_length;
+
+ buf[0] = HS_CERTIFICATE;
+ buf[1] = 0;
+ buf[4] = 0;
+
+ while (i < ssl->ssl_ctx->chain_length)
+ {
+ SSL_CERT *cert = &ssl->ssl_ctx->certs[i];
+ buf[offset++] = 0;
+ buf[offset++] = cert->size >> 8; /* cert 1 length */
+ buf[offset++] = cert->size & 0xff;
+ memcpy(&buf[offset], cert->buf, cert->size);
+ offset += cert->size;
+ i++;
+ }
+
+ chain_length = offset - 7;
+ buf[5] = chain_length >> 8; /* cert chain length */
+ buf[6] = chain_length & 0xff;
+ chain_length += 3;
+ buf[2] = chain_length >> 8; /* handshake length */
+ buf[3] = chain_length & 0xff;
+ ssl->bm_index = offset;
+ return send_packet(ssl, PT_HANDSHAKE_PROTOCOL, NULL, offset);
+}
+
+/**
+ * Create a blob of memory that we'll get rid of once the handshake is
+ * complete.
+ */
+void disposable_new(SSL *ssl)
+{
+ if (ssl->dc == NULL)
+ {
+ ssl->dc = (DISPOSABLE_CTX *)calloc(1, sizeof(DISPOSABLE_CTX));
+ MD5_Init(&ssl->dc->md5_ctx);
+ SHA1_Init(&ssl->dc->sha1_ctx);
+ }
+}
+
+/**
+ * Remove the temporary blob of memory.
+ */
+void disposable_free(SSL *ssl)
+{
+ if (ssl->dc)
+ {
+ free(ssl->dc->key_block);
+ memset(ssl->dc, 0, sizeof(DISPOSABLE_CTX));
+ free(ssl->dc);
+ ssl->dc = NULL;
+ }
+
+}
+
+#ifndef CONFIG_SSL_SKELETON_MODE /* no session resumption in this mode */
+/**
+ * Find if an existing session has the same session id. If so, use the
+ * master secret from this session for session resumption.
+ */
+SSL_SESSION *ssl_session_update(int max_sessions, SSL_SESSION *ssl_sessions[],
+ SSL *ssl, const uint8_t *session_id)
+{
+ time_t tm = time(NULL);
+ time_t oldest_sess_time = tm;
+ SSL_SESSION *oldest_sess = NULL;
+ int i;
+
+ /* no sessions? Then bail */
+ if (max_sessions == 0)
+ return NULL;
+
+ SSL_CTX_LOCK(ssl->ssl_ctx->mutex);
+ if (session_id)
+ {
+ for (i = 0; i < max_sessions; i++)
+ {
+ if (ssl_sessions[i])
+ {
+ /* kill off any expired sessions */
+ if (tm > ssl_sessions[i]->conn_time + SSL_EXPIRY_TIME)
+ {
+ session_free(ssl_sessions, i);
+ continue;
+ }
+
+ /* if the session id matches, it must still be less than
+ the expiry time */
+ if (memcmp(ssl_sessions[i]->session_id, session_id,
+ SSL_SESSION_ID_SIZE) == 0)
+ {
+ ssl->session_index = i;
+ memcpy(ssl->dc->master_secret,
+ ssl_sessions[i]->master_secret, SSL_SECRET_SIZE);
+ SET_SSL_FLAG(SSL_SESSION_RESUME);
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+ return ssl_sessions[i]; /* a session was found */
+ }
+ }
+ }
+ }
+
+ /* If we've got here, no matching session was found - so create one */
+ for (i = 0; i < max_sessions; i++)
+ {
+ if (ssl_sessions[i] == NULL)
+ {
+ /* perfect, this will do */
+ ssl_sessions[i] = (SSL_SESSION *)calloc(1, sizeof(SSL_SESSION));
+ ssl_sessions[i]->conn_time = tm;
+ ssl->session_index = i;
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+ return ssl_sessions[i]; /* return the session object */
+ }
+ else if (ssl_sessions[i]->conn_time <= oldest_sess_time)
+ {
+ /* find the oldest session */
+ oldest_sess_time = ssl_sessions[i]->conn_time;
+ oldest_sess = ssl_sessions[i];
+ ssl->session_index = i;
+ }
+ }
+
+ /* ok, we've used up all of our sessions. So blow the oldest session away */
+ if (oldest_sess != NULL)
+ {
+ oldest_sess->conn_time = tm;
+ memset(oldest_sess->session_id, 0, sizeof(SSL_SESSION_ID_SIZE));
+ memset(oldest_sess->master_secret, 0, sizeof(SSL_SECRET_SIZE));
+ }
+
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+ return oldest_sess;
+}
+
+/**
+ * Free an existing session.
+ */
+static void session_free(SSL_SESSION *ssl_sessions[], int sess_index)
+{
+ if (ssl_sessions[sess_index])
+ {
+ free(ssl_sessions[sess_index]);
+ ssl_sessions[sess_index] = NULL;
+ }
+}
+
+/**
+ * This ssl object doesn't want this session anymore.
+ */
+void kill_ssl_session(SSL_SESSION **ssl_sessions, SSL *ssl)
+{
+ SSL_CTX_LOCK(ssl->ssl_ctx->mutex);
+
+ if (ssl->ssl_ctx->num_sessions)
+ {
+ session_free(ssl_sessions, ssl->session_index);
+ ssl->session = NULL;
+ }
+
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+}
+#endif /* CONFIG_SSL_SKELETON_MODE */
+
+/*
+ * Get the session id for a handshake. This will be a 32 byte sequence.
+ */
+EXP_FUNC const uint8_t * STDCALL ssl_get_session_id(const SSL *ssl)
+{
+ return ssl->session_id;
+}
+
+/*
+ * Get the session id size for a handshake.
+ */
+EXP_FUNC uint8_t STDCALL ssl_get_session_id_size(const SSL *ssl)
+{
+ return ssl->sess_id_size;
+}
+
+/*
+ * Return the cipher id (in the SSL form).
+ */
+EXP_FUNC uint8_t STDCALL ssl_get_cipher_id(const SSL *ssl)
+{
+ return ssl->cipher;
+}
+
+/*
+ * Return the status of the handshake.
+ */
+EXP_FUNC int STDCALL ssl_handshake_status(const SSL *ssl)
+{
+ return ssl->hs_status;
+}
+
+/*
+ * Retrieve various parameters about the SSL engine.
+ */
+EXP_FUNC int STDCALL ssl_get_config(int offset)
+{
+ switch (offset)
+ {
+ /* return the appropriate build mode */
+ case SSL_BUILD_MODE:
+#if defined(CONFIG_SSL_FULL_MODE)
+ return SSL_BUILD_FULL_MODE;
+#elif defined(CONFIG_SSL_ENABLE_CLIENT)
+ return SSL_BUILD_ENABLE_CLIENT;
+#elif defined(CONFIG_ENABLE_VERIFICATION)
+ return SSL_BUILD_ENABLE_VERIFICATION;
+#elif defined(CONFIG_SSL_SERVER_ONLY )
+ return SSL_BUILD_SERVER_ONLY;
+#else
+ return SSL_BUILD_SKELETON_MODE;
+#endif
+
+ case SSL_MAX_CERT_CFG_OFFSET:
+ return CONFIG_SSL_MAX_CERTS;
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ case SSL_MAX_CA_CERT_CFG_OFFSET:
+ return CONFIG_X509_MAX_CA_CERTS;
+#endif
+#ifdef CONFIG_SSL_HAS_PEM
+ case SSL_HAS_PEM:
+ return 1;
+#endif
+ default:
+ return 0;
+ }
+}
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+/**
+ * Authenticate a received certificate.
+ */
+EXP_FUNC int STDCALL ssl_verify_cert(const SSL *ssl)
+{
+ int ret;
+ SSL_CTX_LOCK(ssl->ssl_ctx->mutex);
+ ret = x509_verify(ssl->ssl_ctx->ca_cert_ctx, ssl->x509_ctx);
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+
+ if (ret) /* modify into an SSL error type */
+ {
+ ret = SSL_X509_ERROR(ret);
+ }
+
+ return ret;
+}
+
+/**
+ * Process a certificate message.
+ */
+int process_certificate(SSL *ssl, X509_CTX **x509_ctx)
+{
+ int ret = SSL_OK;
+ uint8_t *buf = &ssl->bm_data[ssl->dc->bm_proc_index];
+ int pkt_size = ssl->bm_index;
+ int cert_size, offset = 5;
+ int total_cert_size = (buf[offset]<<8) + buf[offset+1];
+ int is_client = IS_SET_SSL_FLAG(SSL_IS_CLIENT);
+ X509_CTX **chain = x509_ctx;
+ offset += 2;
+
+ PARANOIA_CHECK(total_cert_size, offset);
+
+ while (offset < total_cert_size)
+ {
+ offset++; /* skip empty char */
+ cert_size = (buf[offset]<<8) + buf[offset+1];
+ offset += 2;
+
+ if (x509_new(&buf[offset], NULL, chain))
+ {
+ ret = SSL_ERROR_BAD_CERTIFICATE;
+ goto error;
+ }
+
+ chain = &((*chain)->next);
+ offset += cert_size;
+ }
+
+ PARANOIA_CHECK(pkt_size, offset);
+
+ /* if we are client we can do the verify now or later */
+ if (is_client && !IS_SET_SSL_FLAG(SSL_SERVER_VERIFY_LATER))
+ {
+ ret = ssl_verify_cert(ssl);
+ }
+
+ ssl->next_state = is_client ? HS_SERVER_HELLO_DONE : HS_CLIENT_KEY_XCHG;
+ ssl->dc->bm_proc_index += offset;
+error:
+ return ret;
+}
+
+#endif /* CONFIG_SSL_CERT_VERIFICATION */
+
+/**
+ * Debugging routine to display SSL handshaking stuff.
+ */
+#ifdef CONFIG_SSL_FULL_MODE
+/**
+ * Debugging routine to display SSL states.
+ */
+void DISPLAY_STATE(SSL *ssl, int is_send, uint8_t state, int not_ok)
+{
+ const char *str;
+
+ if (!IS_SET_SSL_FLAG(SSL_DISPLAY_STATES))
+ return;
+
+ printf(not_ok ? "Error - invalid State:\t" : "State:\t");
+ printf(is_send ? "sending " : "receiving ");
+
+ switch (state)
+ {
+ case HS_HELLO_REQUEST:
+ str = "Hello Request (0)";
+ break;
+
+ case HS_CLIENT_HELLO:
+ str = "Client Hello (1)";
+ break;
+
+ case HS_SERVER_HELLO:
+ str = "Server Hello (2)";
+ break;
+
+ case HS_CERTIFICATE:
+ str = "Certificate (11)";
+ break;
+
+ case HS_SERVER_KEY_XCHG:
+ str = "Certificate Request (12)";
+ break;
+
+ case HS_CERT_REQ:
+ str = "Certificate Request (13)";
+ break;
+
+ case HS_SERVER_HELLO_DONE:
+ str = "Server Hello Done (14)";
+ break;
+
+ case HS_CERT_VERIFY:
+ str = "Certificate Verify (15)";
+ break;
+
+ case HS_CLIENT_KEY_XCHG:
+ str = "Client Key Exchange (16)";
+ break;
+
+ case HS_FINISHED:
+ str = "Finished (16)";
+ break;
+
+ default:
+ str = "Error (Unknown)";
+
+ break;
+ }
+
+ printf("%s\n", str);
+ TTY_FLUSH();
+}
+
+/**
+ * Debugging routine to display RSA objects
+ */
+void DISPLAY_RSA(SSL *ssl, const RSA_CTX *rsa_ctx)
+{
+ if (!IS_SET_SSL_FLAG(SSL_DISPLAY_RSA))
+ return;
+
+ RSA_print(rsa_ctx);
+ TTY_FLUSH();
+}
+
+/**
+ * Debugging routine to display SSL handshaking bytes.
+ */
+void DISPLAY_BYTES(SSL *ssl, const char *format,
+ const uint8_t *data, int size, ...)
+{
+ va_list(ap);
+
+ if (!IS_SET_SSL_FLAG(SSL_DISPLAY_BYTES))
+ return;
+
+ va_start(ap, size);
+ print_blob(format, data, size, va_arg(ap, char *));
+ va_end(ap);
+ TTY_FLUSH();
+}
+
+/**
+ * Debugging routine to display SSL handshaking errors.
+ */
+EXP_FUNC void STDCALL ssl_display_error(int error_code)
+{
+ if (error_code == SSL_OK)
+ return;
+
+ printf("Error: ");
+
+ /* X509 error? */
+ if (error_code < SSL_X509_OFFSET)
+ {
+ printf("%s\n", x509_display_error(error_code - SSL_X509_OFFSET));
+ return;
+ }
+
+ /* SSL alert error code */
+ if (error_code > SSL_ERROR_CONN_LOST)
+ {
+ printf("SSL error %d\n", -error_code);
+ return;
+ }
+
+ switch (error_code)
+ {
+ case SSL_ERROR_DEAD:
+ printf("connection dead");
+ break;
+
+ case SSL_ERROR_INVALID_HANDSHAKE:
+ printf("invalid handshake");
+ break;
+
+ case SSL_ERROR_INVALID_PROT_MSG:
+ printf("invalid protocol message");
+ break;
+
+ case SSL_ERROR_INVALID_HMAC:
+ printf("invalid mac");
+ break;
+
+ case SSL_ERROR_INVALID_VERSION:
+ printf("invalid version");
+ break;
+
+ case SSL_ERROR_INVALID_SESSION:
+ printf("invalid session");
+ break;
+
+ case SSL_ERROR_NO_CIPHER:
+ printf("no cipher");
+ break;
+
+ case SSL_ERROR_CONN_LOST:
+ printf("connection lost");
+ break;
+
+ case SSL_ERROR_BAD_CERTIFICATE:
+ printf("bad certificate");
+ break;
+
+ case SSL_ERROR_INVALID_KEY:
+ printf("invalid key");
+ break;
+
+ case SSL_ERROR_FINISHED_INVALID:
+ printf("finished invalid");
+ break;
+
+ case SSL_ERROR_NO_CERT_DEFINED:
+ printf("no certificate defined");
+ break;
+
+ case SSL_ERROR_NO_CLIENT_RENOG:
+ printf("client renegotiation not supported");
+ break;
+
+ case SSL_ERROR_NOT_SUPPORTED:
+ printf("Option not supported");
+ break;
+
+ default:
+ printf("undefined as yet - %d", error_code);
+ break;
+ }
+
+ printf("\n");
+ TTY_FLUSH();
+}
+
+/**
+ * Debugging routine to display alerts.
+ */
+void DISPLAY_ALERT(SSL *ssl, int alert)
+{
+ if (!IS_SET_SSL_FLAG(SSL_DISPLAY_STATES))
+ return;
+
+ printf("Alert: ");
+
+ switch (alert)
+ {
+ case SSL_ALERT_CLOSE_NOTIFY:
+ printf("close notify");
+ break;
+
+ case SSL_ALERT_INVALID_VERSION:
+ printf("invalid version");
+ break;
+
+ case SSL_ALERT_BAD_CERTIFICATE:
+ printf("bad certificate");
+ break;
+
+ case SSL_ALERT_UNEXPECTED_MESSAGE:
+ printf("unexpected message");
+ break;
+
+ case SSL_ALERT_BAD_RECORD_MAC:
+ printf("bad record mac");
+ break;
+
+ case SSL_ALERT_HANDSHAKE_FAILURE:
+ printf("handshake failure");
+ break;
+
+ case SSL_ALERT_ILLEGAL_PARAMETER:
+ printf("illegal parameter");
+ break;
+
+ case SSL_ALERT_DECODE_ERROR:
+ printf("decode error");
+ break;
+
+ case SSL_ALERT_DECRYPT_ERROR:
+ printf("decrypt error");
+ break;
+
+ case SSL_ALERT_NO_RENEGOTIATION:
+ printf("no renegotiation");
+ break;
+
+ default:
+ printf("alert - (unknown %d)", alert);
+ break;
+ }
+
+ printf("\n");
+ TTY_FLUSH();
+}
+
+#endif /* CONFIG_SSL_FULL_MODE */
+
+/**
+ * Return the version of this library.
+ */
+EXP_FUNC const char * STDCALL ssl_version()
+{
+ static const char * axtls_version = AXTLS_VERSION;
+ return axtls_version;
+}
+
+/**
+ * Enable the various language bindings to work regardless of the
+ * configuration - they just return an error statement and a bad return code.
+ */
+#if !defined(CONFIG_SSL_FULL_MODE)
+EXP_FUNC void STDCALL ssl_display_error(int error_code) {}
+#endif
+
+#ifdef CONFIG_BINDINGS
+#if !defined(CONFIG_SSL_ENABLE_CLIENT)
+EXP_FUNC SSL * STDCALL ssl_client_new(SSL_CTX *ssl_ctx, int client_fd, const
+ uint8_t *session_id, uint8_t sess_id_size)
+{
+ printf(unsupported_str);
+ return NULL;
+}
+#endif
+
+#if !defined(CONFIG_SSL_CERT_VERIFICATION)
+EXP_FUNC int STDCALL ssl_verify_cert(const SSL *ssl)
+{
+ printf(unsupported_str);
+ return -1;
+}
+
+
+EXP_FUNC const char * STDCALL ssl_get_cert_dn(const SSL *ssl, int component)
+{
+ printf(unsupported_str);
+ return NULL;
+}
+
+EXP_FUNC const char * STDCALL ssl_get_cert_subject_alt_dnsname(const SSL *ssl, int index)
+{
+ printf(unsupported_str);
+ return NULL;
+}
+
+#endif /* CONFIG_SSL_CERT_VERIFICATION */
+
+#endif /* CONFIG_BINDINGS */
+
diff --git a/axTLS/src/ssl/tls1.h b/axTLS/src/ssl/tls1.h
new file mode 100644
index 0000000..e73bc1a
--- /dev/null
+++ b/axTLS/src/ssl/tls1.h
@@ -0,0 +1,295 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @file tls1.h
+ *
+ * @brief The definitions for the TLS library.
+ */
+#ifndef HEADER_SSL_LIB_H
+#define HEADER_SSL_LIB_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "version.h"
+#include "crypto.h"
+#include "crypto_misc.h"
+
+#define SSL_PROTOCOL_MIN_VERSION 0x31 /* TLS v1.0 */
+#define SSL_PROTOCOL_MINOR_VERSION 0x02 /* TLS v1.1 */
+#define SSL_PROTOCOL_VERSION_MAX 0x32 /* TLS v1.1 */
+#define SSL_PROTOCOL_VERSION1_1 0x32 /* TLS v1.1 */
+#define SSL_RANDOM_SIZE 32
+#define SSL_SECRET_SIZE 48
+#define SSL_FINISHED_HASH_SIZE 12
+#define SSL_RECORD_SIZE 5
+#define SSL_SERVER_READ 0
+#define SSL_SERVER_WRITE 1
+#define SSL_CLIENT_READ 2
+#define SSL_CLIENT_WRITE 3
+#define SSL_HS_HDR_SIZE 4
+
+/* the flags we use while establishing a connection */
+#define SSL_NEED_RECORD 0x0001
+#define SSL_TX_ENCRYPTED 0x0002
+#define SSL_RX_ENCRYPTED 0x0004
+#define SSL_SESSION_RESUME 0x0008
+#define SSL_IS_CLIENT 0x0010
+#define SSL_HAS_CERT_REQ 0x0020
+#define SSL_SENT_CLOSE_NOTIFY 0x0040
+
+/* some macros to muck around with flag bits */
+#define SET_SSL_FLAG(A) (ssl->flag |= A)
+#define CLR_SSL_FLAG(A) (ssl->flag &= ~A)
+#define IS_SET_SSL_FLAG(A) (ssl->flag & A)
+
+#define MAX_KEY_BYTE_SIZE 512 /* for a 4096 bit key */
+#define RT_MAX_PLAIN_LENGTH 16384
+#define RT_EXTRA 1024
+#define BM_RECORD_OFFSET 5
+
+#ifdef CONFIG_SSL_SKELETON_MODE
+#define NUM_PROTOCOLS 1
+#else
+#define NUM_PROTOCOLS 4
+#endif
+
+#define PARANOIA_CHECK(A, B) if (A < B) { \
+ ret = SSL_ERROR_INVALID_HANDSHAKE; goto error; }
+
+/* protocol types */
+enum
+{
+ PT_CHANGE_CIPHER_SPEC = 20,
+ PT_ALERT_PROTOCOL,
+ PT_HANDSHAKE_PROTOCOL,
+ PT_APP_PROTOCOL_DATA
+};
+
+/* handshaking types */
+enum
+{
+ HS_HELLO_REQUEST,
+ HS_CLIENT_HELLO,
+ HS_SERVER_HELLO,
+ HS_CERTIFICATE = 11,
+ HS_SERVER_KEY_XCHG,
+ HS_CERT_REQ,
+ HS_SERVER_HELLO_DONE,
+ HS_CERT_VERIFY,
+ HS_CLIENT_KEY_XCHG,
+ HS_FINISHED = 20
+};
+
+typedef struct
+{
+ uint8_t cipher;
+ uint8_t key_size;
+ uint8_t iv_size;
+ uint8_t key_block_size;
+ uint8_t padding_size;
+ uint8_t digest_size;
+ hmac_func hmac;
+ crypt_func encrypt;
+ crypt_func decrypt;
+} cipher_info_t;
+
+struct _SSLObjLoader
+{
+ uint8_t *buf;
+ int len;
+};
+
+typedef struct _SSLObjLoader SSLObjLoader;
+
+typedef struct
+{
+ time_t conn_time;
+ uint8_t session_id[SSL_SESSION_ID_SIZE];
+ uint8_t master_secret[SSL_SECRET_SIZE];
+} SSL_SESSION;
+
+typedef struct
+{
+ uint8_t *buf;
+ int size;
+} SSL_CERT;
+
+typedef struct
+{
+ MD5_CTX md5_ctx;
+ SHA1_CTX sha1_ctx;
+ uint8_t final_finish_mac[SSL_FINISHED_HASH_SIZE];
+ uint8_t *key_block;
+ uint8_t master_secret[SSL_SECRET_SIZE];
+ uint8_t client_random[SSL_RANDOM_SIZE]; /* client's random sequence */
+ uint8_t server_random[SSL_RANDOM_SIZE]; /* server's random sequence */
+ uint16_t bm_proc_index;
+} DISPOSABLE_CTX;
+
+struct _SSL
+{
+ uint32_t flag;
+ uint16_t need_bytes;
+ uint16_t got_bytes;
+ uint8_t record_type;
+ uint8_t cipher;
+ uint8_t sess_id_size;
+ uint8_t version;
+ uint8_t client_version;
+ int16_t next_state;
+ int16_t hs_status;
+ DISPOSABLE_CTX *dc; /* temporary data which we'll get rid of soon */
+ int client_fd;
+ const cipher_info_t *cipher_info;
+ void *encrypt_ctx;
+ void *decrypt_ctx;
+ uint8_t bm_all_data[RT_MAX_PLAIN_LENGTH+RT_EXTRA];
+ uint8_t *bm_data;
+ uint16_t bm_index;
+ uint16_t bm_read_index;
+ struct _SSL *next; /* doubly linked list */
+ struct _SSL *prev;
+ struct _SSL_CTX *ssl_ctx; /* back reference to a clnt/svr ctx */
+#ifndef CONFIG_SSL_SKELETON_MODE
+ uint16_t session_index;
+ SSL_SESSION *session;
+#endif
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ X509_CTX *x509_ctx;
+#endif
+
+ uint8_t session_id[SSL_SESSION_ID_SIZE];
+ uint8_t client_mac[SHA1_SIZE]; /* for HMAC verification */
+ uint8_t server_mac[SHA1_SIZE]; /* for HMAC verification */
+ uint8_t read_sequence[8]; /* 64 bit sequence number */
+ uint8_t write_sequence[8]; /* 64 bit sequence number */
+ uint8_t hmac_header[SSL_RECORD_SIZE]; /* rx hmac */
+};
+
+typedef struct _SSL SSL;
+
+struct _SSL_CTX
+{
+ uint32_t options;
+ uint8_t chain_length;
+ RSA_CTX *rsa_ctx;
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ CA_CERT_CTX *ca_cert_ctx;
+#endif
+ SSL *head;
+ SSL *tail;
+ SSL_CERT certs[CONFIG_SSL_MAX_CERTS];
+#ifndef CONFIG_SSL_SKELETON_MODE
+ uint16_t num_sessions;
+ SSL_SESSION **ssl_sessions;
+#endif
+#ifdef CONFIG_SSL_CTX_MUTEXING
+ SSL_CTX_MUTEX_TYPE mutex;
+#endif
+#ifdef CONFIG_OPENSSL_COMPATIBLE
+ void *bonus_attr;
+#endif
+};
+
+typedef struct _SSL_CTX SSL_CTX;
+
+/* backwards compatibility */
+typedef struct _SSL_CTX SSLCTX;
+
+extern const uint8_t ssl_prot_prefs[NUM_PROTOCOLS];
+
+SSL *ssl_new(SSL_CTX *ssl_ctx, int client_fd);
+void disposable_new(SSL *ssl);
+void disposable_free(SSL *ssl);
+int send_packet(SSL *ssl, uint8_t protocol,
+ const uint8_t *in, int length);
+int do_svr_handshake(SSL *ssl, int handshake_type, uint8_t *buf, int hs_len);
+int do_clnt_handshake(SSL *ssl, int handshake_type, uint8_t *buf, int hs_len);
+int process_finished(SSL *ssl, uint8_t *buf, int hs_len);
+int process_sslv23_client_hello(SSL *ssl);
+int send_alert(SSL *ssl, int error_code);
+int send_finished(SSL *ssl);
+int send_certificate(SSL *ssl);
+int basic_read(SSL *ssl, uint8_t **in_data);
+int send_change_cipher_spec(SSL *ssl);
+void finished_digest(SSL *ssl, const char *label, uint8_t *digest);
+void generate_master_secret(SSL *ssl, const uint8_t *premaster_secret);
+void add_packet(SSL *ssl, const uint8_t *pkt, int len);
+int add_cert(SSL_CTX *ssl_ctx, const uint8_t *buf, int len);
+int add_private_key(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj);
+void ssl_obj_free(SSLObjLoader *ssl_obj);
+int pkcs8_decode(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj, const char *password);
+int pkcs12_decode(SSL_CTX *ssl_ctx, SSLObjLoader *ssl_obj, const char *password);
+int load_key_certs(SSL_CTX *ssl_ctx);
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+int add_cert_auth(SSL_CTX *ssl_ctx, const uint8_t *buf, int len);
+void remove_ca_certs(CA_CERT_CTX *ca_cert_ctx);
+#endif
+#ifdef CONFIG_SSL_ENABLE_CLIENT
+int do_client_connect(SSL *ssl);
+#endif
+
+#ifdef CONFIG_SSL_FULL_MODE
+void DISPLAY_STATE(SSL *ssl, int is_send, uint8_t state, int not_ok);
+void DISPLAY_BYTES(SSL *ssl, const char *format,
+ const uint8_t *data, int size, ...);
+void DISPLAY_CERT(SSL *ssl, const X509_CTX *x509_ctx);
+void DISPLAY_RSA(SSL *ssl, const RSA_CTX *rsa_ctx);
+void DISPLAY_ALERT(SSL *ssl, int alert);
+#else
+#define DISPLAY_STATE(A,B,C,D)
+#define DISPLAY_CERT(A,B)
+#define DISPLAY_RSA(A,B)
+#define DISPLAY_ALERT(A, B)
+#ifdef WIN32
+void DISPLAY_BYTES(SSL *ssl, const char *format,/* win32 has no variadic macros */
+ const uint8_t *data, int size, ...);
+#else
+#define DISPLAY_BYTES(A,B,C,D,...)
+#endif
+#endif
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+int process_certificate(SSL *ssl, X509_CTX **x509_ctx);
+#endif
+
+SSL_SESSION *ssl_session_update(int max_sessions,
+ SSL_SESSION *ssl_sessions[], SSL *ssl,
+ const uint8_t *session_id);
+void kill_ssl_session(SSL_SESSION **ssl_sessions, SSL *ssl);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/axTLS/src/ssl/tls1_clnt.c b/axTLS/src/ssl/tls1_clnt.c
new file mode 100644
index 0000000..196b40e
--- /dev/null
+++ b/axTLS/src/ssl/tls1_clnt.c
@@ -0,0 +1,395 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <stdio.h>
+#include "os_port.h"
+#include "ssl.h"
+
+#ifdef CONFIG_SSL_ENABLE_CLIENT /* all commented out if no client */
+
+static int send_client_hello(SSL *ssl);
+static int process_server_hello(SSL *ssl);
+static int process_server_hello_done(SSL *ssl);
+static int send_client_key_xchg(SSL *ssl);
+static int process_cert_req(SSL *ssl);
+static int send_cert_verify(SSL *ssl);
+
+/*
+ * Establish a new SSL connection to an SSL server.
+ */
+EXP_FUNC SSL * STDCALL ssl_client_new(SSL_CTX *ssl_ctx, int client_fd, const
+ uint8_t *session_id, uint8_t sess_id_size)
+{
+ SSL *ssl = ssl_new(ssl_ctx, client_fd);
+ ssl->version = SSL_PROTOCOL_VERSION_MAX; /* try top version first */
+
+ if (session_id && ssl_ctx->num_sessions)
+ {
+ if (sess_id_size > SSL_SESSION_ID_SIZE) /* validity check */
+ {
+ ssl_free(ssl);
+ return NULL;
+ }
+
+ memcpy(ssl->session_id, session_id, sess_id_size);
+ ssl->sess_id_size = sess_id_size;
+ SET_SSL_FLAG(SSL_SESSION_RESUME); /* just flag for later */
+ }
+
+ SET_SSL_FLAG(SSL_IS_CLIENT);
+ do_client_connect(ssl);
+ return ssl;
+}
+
+/*
+ * Process the handshake record.
+ */
+int do_clnt_handshake(SSL *ssl, int handshake_type, uint8_t *buf, int hs_len)
+{
+ int ret;
+
+ /* To get here the state must be valid */
+ switch (handshake_type)
+ {
+ case HS_SERVER_HELLO:
+ ret = process_server_hello(ssl);
+ break;
+
+ case HS_CERTIFICATE:
+ ret = process_certificate(ssl, &ssl->x509_ctx);
+ break;
+
+ case HS_SERVER_HELLO_DONE:
+ if ((ret = process_server_hello_done(ssl)) == SSL_OK)
+ {
+ if (IS_SET_SSL_FLAG(SSL_HAS_CERT_REQ))
+ {
+ if ((ret = send_certificate(ssl)) == SSL_OK &&
+ (ret = send_client_key_xchg(ssl)) == SSL_OK)
+ {
+ send_cert_verify(ssl);
+ }
+ }
+ else
+ {
+ ret = send_client_key_xchg(ssl);
+ }
+
+ if (ret == SSL_OK &&
+ (ret = send_change_cipher_spec(ssl)) == SSL_OK)
+ {
+ ret = send_finished(ssl);
+ }
+ }
+ break;
+
+ case HS_CERT_REQ:
+ ret = process_cert_req(ssl);
+ break;
+
+ case HS_FINISHED:
+ ret = process_finished(ssl, buf, hs_len);
+ disposable_free(ssl); /* free up some memory */
+ /* note: client renegotiation is not allowed after this */
+ break;
+
+ case HS_HELLO_REQUEST:
+ disposable_new(ssl);
+ ret = do_client_connect(ssl);
+ break;
+
+ default:
+ ret = SSL_ERROR_INVALID_HANDSHAKE;
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Do the handshaking from the beginning.
+ */
+int do_client_connect(SSL *ssl)
+{
+ int ret = SSL_OK;
+
+ send_client_hello(ssl); /* send the client hello */
+ ssl->bm_read_index = 0;
+ ssl->next_state = HS_SERVER_HELLO;
+ ssl->hs_status = SSL_NOT_OK; /* not connected */
+
+ /* sit in a loop until it all looks good */
+ if (!IS_SET_SSL_FLAG(SSL_CONNECT_IN_PARTS))
+ {
+ while (ssl->hs_status != SSL_OK)
+ {
+ ret = ssl_read(ssl, NULL);
+
+ if (ret < SSL_OK)
+ break;
+ }
+
+ ssl->hs_status = ret; /* connected? */
+ }
+
+ return ret;
+}
+
+/*
+ * Send the initial client hello.
+ */
+static int send_client_hello(SSL *ssl)
+{
+ uint8_t *buf = ssl->bm_data;
+ time_t tm = time(NULL);
+ uint8_t *tm_ptr = &buf[6]; /* time will go here */
+ int i, offset;
+
+ buf[0] = HS_CLIENT_HELLO;
+ buf[1] = 0;
+ buf[2] = 0;
+ /* byte 3 is calculated later */
+ buf[4] = 0x03;
+ buf[5] = ssl->version & 0x0f;
+
+ /* client random value - spec says that 1st 4 bytes are big endian time */
+ *tm_ptr++ = (uint8_t)(((long)tm & 0xff000000) >> 24);
+ *tm_ptr++ = (uint8_t)(((long)tm & 0x00ff0000) >> 16);
+ *tm_ptr++ = (uint8_t)(((long)tm & 0x0000ff00) >> 8);
+ *tm_ptr++ = (uint8_t)(((long)tm & 0x000000ff));
+ get_random(SSL_RANDOM_SIZE-4, &buf[10]);
+ memcpy(ssl->dc->client_random, &buf[6], SSL_RANDOM_SIZE);
+ offset = 6 + SSL_RANDOM_SIZE;
+
+ /* give session resumption a go */
+ if (IS_SET_SSL_FLAG(SSL_SESSION_RESUME)) /* set initially by user */
+ {
+ buf[offset++] = ssl->sess_id_size;
+ memcpy(&buf[offset], ssl->session_id, ssl->sess_id_size);
+ offset += ssl->sess_id_size;
+ CLR_SSL_FLAG(SSL_SESSION_RESUME); /* clear so we can set later */
+ }
+ else
+ {
+ /* no session id - because no session resumption just yet */
+ buf[offset++] = 0;
+ }
+
+ buf[offset++] = 0; /* number of ciphers */
+ buf[offset++] = NUM_PROTOCOLS*2;/* number of ciphers */
+
+ /* put all our supported protocols in our request */
+ for (i = 0; i < NUM_PROTOCOLS; i++)
+ {
+ buf[offset++] = 0; /* cipher we are using */
+ buf[offset++] = ssl_prot_prefs[i];
+ }
+
+ buf[offset++] = 1; /* no compression */
+ buf[offset++] = 0;
+ buf[3] = offset - 4; /* handshake size */
+
+ return send_packet(ssl, PT_HANDSHAKE_PROTOCOL, NULL, offset);
+}
+
+/*
+ * Process the server hello.
+ */
+static int process_server_hello(SSL *ssl)
+{
+ uint8_t *buf = ssl->bm_data;
+ int pkt_size = ssl->bm_index;
+ int num_sessions = ssl->ssl_ctx->num_sessions;
+ uint8_t sess_id_size;
+ int offset, ret = SSL_OK;
+
+ /* check that we are talking to a TLSv1 server */
+ uint8_t version = (buf[4] << 4) + buf[5];
+ if (version > SSL_PROTOCOL_VERSION_MAX)
+ {
+ version = SSL_PROTOCOL_VERSION_MAX;
+ }
+ else if (ssl->version < SSL_PROTOCOL_MIN_VERSION)
+ {
+ ret = SSL_ERROR_INVALID_VERSION;
+ ssl_display_error(ret);
+ goto error;
+ }
+
+ ssl->version = version;
+
+ /* get the server random value */
+ memcpy(ssl->dc->server_random, &buf[6], SSL_RANDOM_SIZE);
+ offset = 6 + SSL_RANDOM_SIZE; /* skip of session id size */
+ sess_id_size = buf[offset++];
+
+ if (sess_id_size > SSL_SESSION_ID_SIZE)
+ {
+ ret = SSL_ERROR_INVALID_SESSION;
+ goto error;
+ }
+
+ if (num_sessions)
+ {
+ ssl->session = ssl_session_update(num_sessions,
+ ssl->ssl_ctx->ssl_sessions, ssl, &buf[offset]);
+ memcpy(ssl->session->session_id, &buf[offset], sess_id_size);
+
+ /* pad the rest with 0's */
+ if (sess_id_size < SSL_SESSION_ID_SIZE)
+ {
+ memset(&ssl->session->session_id[sess_id_size], 0,
+ SSL_SESSION_ID_SIZE-sess_id_size);
+ }
+ }
+
+ memcpy(ssl->session_id, &buf[offset], sess_id_size);
+ ssl->sess_id_size = sess_id_size;
+ offset += sess_id_size;
+
+ /* get the real cipher we are using */
+ ssl->cipher = buf[++offset];
+ ssl->next_state = IS_SET_SSL_FLAG(SSL_SESSION_RESUME) ?
+ HS_FINISHED : HS_CERTIFICATE;
+
+ offset++; // skip the compr
+ PARANOIA_CHECK(pkt_size, offset);
+ ssl->dc->bm_proc_index = offset+1;
+
+error:
+ return ret;
+}
+
+/**
+ * Process the server hello done message.
+ */
+static int process_server_hello_done(SSL *ssl)
+{
+ ssl->next_state = HS_FINISHED;
+ return SSL_OK;
+}
+
+/*
+ * Send a client key exchange message.
+ */
+static int send_client_key_xchg(SSL *ssl)
+{
+ uint8_t *buf = ssl->bm_data;
+ uint8_t premaster_secret[SSL_SECRET_SIZE];
+ int enc_secret_size = -1;
+
+ buf[0] = HS_CLIENT_KEY_XCHG;
+ buf[1] = 0;
+
+ premaster_secret[0] = 0x03; /* encode the version number */
+ premaster_secret[1] = SSL_PROTOCOL_MINOR_VERSION; /* must be TLS 1.1 */
+ get_random(SSL_SECRET_SIZE-2, &premaster_secret[2]);
+ DISPLAY_RSA(ssl, ssl->x509_ctx->rsa_ctx);
+
+ /* rsa_ctx->bi_ctx is not thread-safe */
+ SSL_CTX_LOCK(ssl->ssl_ctx->mutex);
+ enc_secret_size = RSA_encrypt(ssl->x509_ctx->rsa_ctx, premaster_secret,
+ SSL_SECRET_SIZE, &buf[6], 0);
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+
+ buf[2] = (enc_secret_size + 2) >> 8;
+ buf[3] = (enc_secret_size + 2) & 0xff;
+ buf[4] = enc_secret_size >> 8;
+ buf[5] = enc_secret_size & 0xff;
+
+ generate_master_secret(ssl, premaster_secret);
+ return send_packet(ssl, PT_HANDSHAKE_PROTOCOL, NULL, enc_secret_size+6);
+}
+
+/*
+ * Process the certificate request.
+ */
+static int process_cert_req(SSL *ssl)
+{
+ uint8_t *buf = &ssl->bm_data[ssl->dc->bm_proc_index];
+ int ret = SSL_OK;
+ int offset = (buf[2] << 4) + buf[3];
+ int pkt_size = ssl->bm_index;
+
+ /* don't do any processing - we will send back an RSA certificate anyway */
+ ssl->next_state = HS_SERVER_HELLO_DONE;
+ SET_SSL_FLAG(SSL_HAS_CERT_REQ);
+ ssl->dc->bm_proc_index += offset;
+ PARANOIA_CHECK(pkt_size, offset);
+error:
+ return ret;
+}
+
+/*
+ * Send a certificate verify message.
+ */
+static int send_cert_verify(SSL *ssl)
+{
+ uint8_t *buf = ssl->bm_data;
+ uint8_t dgst[MD5_SIZE+SHA1_SIZE];
+ RSA_CTX *rsa_ctx = ssl->ssl_ctx->rsa_ctx;
+ int n = 0, ret;
+
+ DISPLAY_RSA(ssl, rsa_ctx);
+
+ buf[0] = HS_CERT_VERIFY;
+ buf[1] = 0;
+
+ finished_digest(ssl, NULL, dgst); /* calculate the digest */
+
+ /* rsa_ctx->bi_ctx is not thread-safe */
+ if (rsa_ctx)
+ {
+ SSL_CTX_LOCK(ssl->ssl_ctx->mutex);
+ n = RSA_encrypt(rsa_ctx, dgst, sizeof(dgst), &buf[6], 1);
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+
+ if (n == 0)
+ {
+ ret = SSL_ERROR_INVALID_KEY;
+ goto error;
+ }
+ }
+
+ buf[4] = n >> 8; /* add the RSA size (not officially documented) */
+ buf[5] = n & 0xff;
+ n += 2;
+ buf[2] = n >> 8;
+ buf[3] = n & 0xff;
+ ret = send_packet(ssl, PT_HANDSHAKE_PROTOCOL, NULL, n+4);
+
+error:
+ return ret;
+}
+
+#endif /* CONFIG_SSL_ENABLE_CLIENT */
diff --git a/axTLS/src/ssl/tls1_svr.c b/axTLS/src/ssl/tls1_svr.c
new file mode 100644
index 0000000..f374928
--- /dev/null
+++ b/axTLS/src/ssl/tls1_svr.c
@@ -0,0 +1,478 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "os_port.h"
+#include "ssl.h"
+
+static const uint8_t g_hello_done[] = { HS_SERVER_HELLO_DONE, 0, 0, 0 };
+
+static int process_client_hello(SSL *ssl);
+static int send_server_hello_sequence(SSL *ssl);
+static int send_server_hello(SSL *ssl);
+static int send_server_hello_done(SSL *ssl);
+static int process_client_key_xchg(SSL *ssl);
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+static int send_certificate_request(SSL *ssl);
+static int process_cert_verify(SSL *ssl);
+#endif
+
+/*
+ * Establish a new SSL connection to an SSL client.
+ */
+EXP_FUNC SSL * STDCALL ssl_server_new(SSL_CTX *ssl_ctx, int client_fd)
+{
+ SSL *ssl;
+
+ ssl = ssl_new(ssl_ctx, client_fd);
+ ssl->next_state = HS_CLIENT_HELLO;
+
+#ifdef CONFIG_SSL_FULL_MODE
+ if (ssl_ctx->chain_length == 0)
+ printf("Warning - no server certificate defined\n"); TTY_FLUSH();
+#endif
+
+ return ssl;
+}
+
+/*
+ * Process the handshake record.
+ */
+int do_svr_handshake(SSL *ssl, int handshake_type, uint8_t *buf, int hs_len)
+{
+ int ret = SSL_OK;
+ ssl->hs_status = SSL_NOT_OK; /* not connected */
+
+ /* To get here the state must be valid */
+ switch (handshake_type)
+ {
+ case HS_CLIENT_HELLO:
+ if ((ret = process_client_hello(ssl)) == SSL_OK)
+ ret = send_server_hello_sequence(ssl);
+ break;
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ case HS_CERTIFICATE:/* the client sends its cert */
+ ret = process_certificate(ssl, &ssl->x509_ctx);
+
+ if (ret == SSL_OK) /* verify the cert */
+ {
+ int cert_res;
+ cert_res = x509_verify(
+ ssl->ssl_ctx->ca_cert_ctx, ssl->x509_ctx);
+ ret = (cert_res == 0) ? SSL_OK : SSL_X509_ERROR(cert_res);
+ }
+ break;
+
+ case HS_CERT_VERIFY:
+ ret = process_cert_verify(ssl);
+ add_packet(ssl, buf, hs_len); /* needs to be done after */
+ break;
+#endif
+ case HS_CLIENT_KEY_XCHG:
+ ret = process_client_key_xchg(ssl);
+ break;
+
+ case HS_FINISHED:
+ ret = process_finished(ssl, buf, hs_len);
+ disposable_free(ssl); /* free up some memory */
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * Process a client hello message.
+ */
+static int process_client_hello(SSL *ssl)
+{
+ uint8_t *buf = ssl->bm_data;
+ uint8_t *record_buf = ssl->hmac_header;
+ int pkt_size = ssl->bm_index;
+ int i, j, cs_len, id_len, offset = 6 + SSL_RANDOM_SIZE;
+ int ret = SSL_OK;
+
+ uint8_t version = (record_buf[1] << 4) + record_buf[2];
+ ssl->version = ssl->client_version = version;
+
+ if (version > SSL_PROTOCOL_VERSION_MAX)
+ {
+ /* use client's version instead */
+ ssl->version = SSL_PROTOCOL_VERSION_MAX;
+ }
+ else if (version < SSL_PROTOCOL_MIN_VERSION) /* old version supported? */
+ {
+ ret = SSL_ERROR_INVALID_VERSION;
+ ssl_display_error(ret);
+ goto error;
+ }
+
+ memcpy(ssl->dc->client_random, &buf[6], SSL_RANDOM_SIZE);
+
+ /* process the session id */
+ id_len = buf[offset++];
+ if (id_len > SSL_SESSION_ID_SIZE)
+ {
+ return SSL_ERROR_INVALID_SESSION;
+ }
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+ ssl->session = ssl_session_update(ssl->ssl_ctx->num_sessions,
+ ssl->ssl_ctx->ssl_sessions, ssl, id_len ? &buf[offset] : NULL);
+#endif
+
+ offset += id_len;
+ cs_len = (buf[offset]<<8) + buf[offset+1];
+ offset += 3; /* add 1 due to all cipher suites being 8 bit */
+
+ PARANOIA_CHECK(pkt_size, offset);
+
+ /* work out what cipher suite we are going to use - client defines
+ the preference */
+ for (i = 0; i < cs_len; i += 2)
+ {
+ for (j = 0; j < NUM_PROTOCOLS; j++)
+ {
+ if (ssl_prot_prefs[j] == buf[offset+i]) /* got a match? */
+ {
+ ssl->cipher = ssl_prot_prefs[j];
+ goto do_state;
+ }
+ }
+ }
+
+ /* ouch! protocol is not supported */
+ ret = SSL_ERROR_NO_CIPHER;
+
+do_state:
+error:
+ return ret;
+}
+
+#ifdef CONFIG_SSL_ENABLE_V23_HANDSHAKE
+/*
+ * Some browsers use a hybrid SSLv2 "client hello"
+ */
+int process_sslv23_client_hello(SSL *ssl)
+{
+ uint8_t *buf = ssl->bm_data;
+ int bytes_needed = ((buf[0] & 0x7f) << 8) + buf[1];
+ int ret = SSL_OK;
+
+ /* we have already read 3 extra bytes so far */
+ int read_len = SOCKET_READ(ssl->client_fd, buf, bytes_needed-3);
+ int cs_len = buf[1];
+ int id_len = buf[3];
+ int ch_len = buf[5];
+ int i, j, offset = 8; /* start at first cipher */
+ int random_offset = 0;
+
+ DISPLAY_BYTES(ssl, "received %d bytes", buf, read_len, read_len);
+
+ add_packet(ssl, buf, read_len);
+
+ /* connection has gone, so die */
+ if (bytes_needed < 0)
+ {
+ return SSL_ERROR_CONN_LOST;
+ }
+
+ /* now work out what cipher suite we are going to use */
+ for (j = 0; j < NUM_PROTOCOLS; j++)
+ {
+ for (i = 0; i < cs_len; i += 3)
+ {
+ if (ssl_prot_prefs[j] == buf[offset+i])
+ {
+ ssl->cipher = ssl_prot_prefs[j];
+ goto server_hello;
+ }
+ }
+ }
+
+ /* ouch! protocol is not supported */
+ ret = SSL_ERROR_NO_CIPHER;
+ goto error;
+
+server_hello:
+ /* get the session id */
+ offset += cs_len - 2; /* we've gone 2 bytes past the end */
+#ifndef CONFIG_SSL_SKELETON_MODE
+ ssl->session = ssl_session_update(ssl->ssl_ctx->num_sessions,
+ ssl->ssl_ctx->ssl_sessions, ssl, id_len ? &buf[offset] : NULL);
+#endif
+
+ /* get the client random data */
+ offset += id_len;
+
+ /* random can be anywhere between 16 and 32 bytes long - so it is padded
+ * with 0's to the left */
+ if (ch_len == 0x10)
+ {
+ random_offset += 0x10;
+ }
+
+ memcpy(&ssl->dc->client_random[random_offset], &buf[offset], ch_len);
+ ret = send_server_hello_sequence(ssl);
+
+error:
+ return ret;
+}
+#endif
+
+/*
+ * Send the entire server hello sequence
+ */
+static int send_server_hello_sequence(SSL *ssl)
+{
+ int ret;
+
+ if ((ret = send_server_hello(ssl)) == SSL_OK)
+ {
+#ifndef CONFIG_SSL_SKELETON_MODE
+ /* resume handshake? */
+ if (IS_SET_SSL_FLAG(SSL_SESSION_RESUME))
+ {
+ if ((ret = send_change_cipher_spec(ssl)) == SSL_OK)
+ {
+ ret = send_finished(ssl);
+ ssl->next_state = HS_FINISHED;
+ }
+ }
+ else
+#endif
+ if ((ret = send_certificate(ssl)) == SSL_OK)
+ {
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ /* ask the client for its certificate */
+ if (IS_SET_SSL_FLAG(SSL_CLIENT_AUTHENTICATION))
+ {
+ if ((ret = send_certificate_request(ssl)) == SSL_OK)
+ {
+ ret = send_server_hello_done(ssl);
+ ssl->next_state = HS_CERTIFICATE;
+ }
+ }
+ else
+#endif
+ {
+ ret = send_server_hello_done(ssl);
+ ssl->next_state = HS_CLIENT_KEY_XCHG;
+ }
+ }
+ }
+
+ return ret;
+}
+
+/*
+ * Send a server hello message.
+ */
+static int send_server_hello(SSL *ssl)
+{
+ uint8_t *buf = ssl->bm_data;
+ int offset = 0;
+
+ buf[0] = HS_SERVER_HELLO;
+ buf[1] = 0;
+ buf[2] = 0;
+ /* byte 3 is calculated later */
+ buf[4] = 0x03;
+ buf[5] = ssl->version & 0x0f;
+
+ /* server random value */
+ get_random(SSL_RANDOM_SIZE, &buf[6]);
+ memcpy(ssl->dc->server_random, &buf[6], SSL_RANDOM_SIZE);
+ offset = 6 + SSL_RANDOM_SIZE;
+
+#ifndef CONFIG_SSL_SKELETON_MODE
+ if (IS_SET_SSL_FLAG(SSL_SESSION_RESUME))
+ {
+ /* retrieve id from session cache */
+ buf[offset++] = SSL_SESSION_ID_SIZE;
+ memcpy(&buf[offset], ssl->session->session_id, SSL_SESSION_ID_SIZE);
+ memcpy(ssl->session_id, ssl->session->session_id, SSL_SESSION_ID_SIZE);
+ ssl->sess_id_size = SSL_SESSION_ID_SIZE;
+ offset += SSL_SESSION_ID_SIZE;
+ }
+ else /* generate our own session id */
+#endif
+ {
+#ifndef CONFIG_SSL_SKELETON_MODE
+ buf[offset++] = SSL_SESSION_ID_SIZE;
+ get_random(SSL_SESSION_ID_SIZE, &buf[offset]);
+ memcpy(ssl->session_id, &buf[offset], SSL_SESSION_ID_SIZE);
+ ssl->sess_id_size = SSL_SESSION_ID_SIZE;
+
+ /* store id in session cache */
+ if (ssl->ssl_ctx->num_sessions)
+ {
+ memcpy(ssl->session->session_id,
+ ssl->session_id, SSL_SESSION_ID_SIZE);
+ }
+
+ offset += SSL_SESSION_ID_SIZE;
+#else
+ buf[offset++] = 0; /* don't bother with session id in skelton mode */
+#endif
+ }
+
+ buf[offset++] = 0; /* cipher we are using */
+ buf[offset++] = ssl->cipher;
+ buf[offset++] = 0; /* no compression */
+ buf[3] = offset - 4; /* handshake size */
+ return send_packet(ssl, PT_HANDSHAKE_PROTOCOL, NULL, offset);
+}
+
+/*
+ * Send the server hello done message.
+ */
+static int send_server_hello_done(SSL *ssl)
+{
+ return send_packet(ssl, PT_HANDSHAKE_PROTOCOL,
+ g_hello_done, sizeof(g_hello_done));
+}
+
+/*
+ * Pull apart a client key exchange message. Decrypt the pre-master key (using
+ * our RSA private key) and then work out the master key. Initialise the
+ * ciphers.
+ */
+static int process_client_key_xchg(SSL *ssl)
+{
+ uint8_t *buf = &ssl->bm_data[ssl->dc->bm_proc_index];
+ int pkt_size = ssl->bm_index;
+ int premaster_size, secret_length = (buf[2] << 8) + buf[3];
+ uint8_t premaster_secret[MAX_KEY_BYTE_SIZE];
+ RSA_CTX *rsa_ctx = ssl->ssl_ctx->rsa_ctx;
+ int offset = 4;
+ int ret = SSL_OK;
+
+ if (rsa_ctx == NULL)
+ {
+ ret = SSL_ERROR_NO_CERT_DEFINED;
+ goto error;
+ }
+
+ /* is there an extra size field? */
+ if ((secret_length - 2) == rsa_ctx->num_octets)
+ offset += 2;
+
+ PARANOIA_CHECK(pkt_size, rsa_ctx->num_octets+offset);
+
+ /* rsa_ctx->bi_ctx is not thread-safe */
+ SSL_CTX_LOCK(ssl->ssl_ctx->mutex);
+ premaster_size = RSA_decrypt(rsa_ctx, &buf[offset], premaster_secret, 1);
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+
+ if (premaster_size != SSL_SECRET_SIZE ||
+ premaster_secret[0] != 0x03 || /* must be the same as client
+ offered version */
+ premaster_secret[1] != (ssl->client_version & 0x0f))
+ {
+ /* guard against a Bleichenbacher attack */
+ get_random(SSL_SECRET_SIZE, premaster_secret);
+ /* and continue - will die eventually when checking the mac */
+ }
+
+#if 0
+ print_blob("pre-master", premaster_secret, SSL_SECRET_SIZE);
+#endif
+
+ generate_master_secret(ssl, premaster_secret);
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ ssl->next_state = IS_SET_SSL_FLAG(SSL_CLIENT_AUTHENTICATION) ?
+ HS_CERT_VERIFY : HS_FINISHED;
+#else
+ ssl->next_state = HS_FINISHED;
+#endif
+
+ ssl->dc->bm_proc_index += rsa_ctx->num_octets+offset;
+error:
+ return ret;
+}
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+static const uint8_t g_cert_request[] = { HS_CERT_REQ, 0, 0, 4, 1, 0, 0, 0 };
+
+/*
+ * Send the certificate request message.
+ */
+static int send_certificate_request(SSL *ssl)
+{
+ return send_packet(ssl, PT_HANDSHAKE_PROTOCOL,
+ g_cert_request, sizeof(g_cert_request));
+}
+
+/*
+ * Ensure the client has the private key by first decrypting the packet and
+ * then checking the packet digests.
+ */
+static int process_cert_verify(SSL *ssl)
+{
+ uint8_t *buf = &ssl->bm_data[ssl->dc->bm_proc_index];
+ int pkt_size = ssl->bm_index;
+ uint8_t dgst_buf[MAX_KEY_BYTE_SIZE];
+ uint8_t dgst[MD5_SIZE+SHA1_SIZE];
+ X509_CTX *x509_ctx = ssl->x509_ctx;
+ int ret = SSL_OK;
+ int n;
+
+ PARANOIA_CHECK(pkt_size, x509_ctx->rsa_ctx->num_octets+6);
+ DISPLAY_RSA(ssl, x509_ctx->rsa_ctx);
+
+ /* rsa_ctx->bi_ctx is not thread-safe */
+ SSL_CTX_LOCK(ssl->ssl_ctx->mutex);
+ n = RSA_decrypt(x509_ctx->rsa_ctx, &buf[6], dgst_buf, 0);
+ SSL_CTX_UNLOCK(ssl->ssl_ctx->mutex);
+
+ if (n != SHA1_SIZE + MD5_SIZE)
+ {
+ ret = SSL_ERROR_INVALID_KEY;
+ goto end_cert_vfy;
+ }
+
+ finished_digest(ssl, NULL, dgst); /* calculate the digest */
+ if (memcmp(dgst_buf, dgst, MD5_SIZE + SHA1_SIZE))
+ {
+ ret = SSL_ERROR_INVALID_KEY;
+ }
+
+end_cert_vfy:
+ ssl->next_state = HS_FINISHED;
+error:
+ return ret;
+}
+
+#endif
diff --git a/axTLS/src/ssl/version.h b/axTLS/src/ssl/version.h
new file mode 100644
index 0000000..cc1ddb2
--- /dev/null
+++ b/axTLS/src/ssl/version.h
@@ -0,0 +1 @@
+#define AXTLS_VERSION "1.4.4"
diff --git a/axTLS/src/ssl/x509.c b/axTLS/src/ssl/x509.c
new file mode 100644
index 0000000..116fa00
--- /dev/null
+++ b/axTLS/src/ssl/x509.c
@@ -0,0 +1,564 @@
+/*
+ * Copyright (c) 2007, Cameron Rich
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of the axTLS project nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/**
+ * @file x509.c
+ *
+ * Certificate processing.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include "os_port.h"
+#include "crypto_misc.h"
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+/**
+ * Retrieve the signature from a certificate.
+ */
+static const uint8_t *get_signature(const uint8_t *asn1_sig, int *len)
+{
+ int offset = 0;
+ const uint8_t *ptr = NULL;
+
+ if (asn1_next_obj(asn1_sig, &offset, ASN1_SEQUENCE) < 0 ||
+ asn1_skip_obj(asn1_sig, &offset, ASN1_SEQUENCE))
+ goto end_get_sig;
+
+ if (asn1_sig[offset++] != ASN1_OCTET_STRING)
+ goto end_get_sig;
+ *len = get_asn1_length(asn1_sig, &offset);
+ ptr = &asn1_sig[offset]; /* all ok */
+
+end_get_sig:
+ return ptr;
+}
+
+#endif
+
+/**
+ * Construct a new x509 object.
+ * @return 0 if ok. < 0 if there was a problem.
+ */
+int x509_new(const uint8_t *cert, int *len, X509_CTX **ctx)
+{
+ int begin_tbs, end_tbs;
+ int ret = X509_NOT_OK, offset = 0, cert_size = 0;
+ X509_CTX *x509_ctx;
+ BI_CTX *bi_ctx;
+ SHA1_CTX sha_ctx_fp;
+
+ *ctx = (X509_CTX *)calloc(1, sizeof(X509_CTX));
+ x509_ctx = *ctx;
+
+ /* get the certificate size */
+ asn1_skip_obj(cert, &cert_size, ASN1_SEQUENCE);
+
+ if (asn1_next_obj(cert, &offset, ASN1_SEQUENCE) < 0)
+ goto end_cert;
+
+ begin_tbs = offset; /* start of the tbs */
+ end_tbs = begin_tbs; /* work out the end of the tbs */
+ asn1_skip_obj(cert, &end_tbs, ASN1_SEQUENCE);
+
+ if (asn1_next_obj(cert, &offset, ASN1_SEQUENCE) < 0)
+ goto end_cert;
+
+ if (cert[offset] == ASN1_EXPLICIT_TAG) /* optional version */
+ {
+ if (asn1_version(cert, &offset, x509_ctx))
+ goto end_cert;
+ }
+
+ if (asn1_skip_obj(cert, &offset, ASN1_INTEGER) || /* serial number */
+ asn1_next_obj(cert, &offset, ASN1_SEQUENCE) < 0)
+ goto end_cert;
+
+ /* make sure the signature is ok */
+ if (asn1_signature_type(cert, &offset, x509_ctx))
+ {
+ ret = X509_VFY_ERROR_UNSUPPORTED_DIGEST;
+ goto end_cert;
+ }
+
+ if (asn1_name(cert, &offset, x509_ctx->ca_cert_dn) ||
+ asn1_validity(cert, &offset, x509_ctx) ||
+ asn1_name(cert, &offset, x509_ctx->cert_dn) ||
+ asn1_public_key(cert, &offset, x509_ctx))
+ {
+ goto end_cert;
+ }
+
+ bi_ctx = x509_ctx->rsa_ctx->bi_ctx;
+
+ SHA1_Init(&sha_ctx_fp);
+ SHA1_Update(&sha_ctx_fp, cert, cert_size);
+ SHA1_Final(x509_ctx->sha1_fingerprint, &sha_ctx_fp);
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION /* only care if doing verification */
+ /* use the appropriate signature algorithm (SHA1/MD5/MD2) */
+ if (x509_ctx->sig_type == SIG_TYPE_MD5)
+ {
+ MD5_CTX md5_ctx;
+ uint8_t md5_dgst[MD5_SIZE];
+ MD5_Init(&md5_ctx);
+ MD5_Update(&md5_ctx, &cert[begin_tbs], end_tbs-begin_tbs);
+ MD5_Final(md5_dgst, &md5_ctx);
+ x509_ctx->digest = bi_import(bi_ctx, md5_dgst, MD5_SIZE);
+ }
+ else if (x509_ctx->sig_type == SIG_TYPE_SHA1)
+ {
+ SHA1_CTX sha_ctx;
+ uint8_t sha_dgst[SHA1_SIZE];
+ SHA1_Init(&sha_ctx);
+ SHA1_Update(&sha_ctx, &cert[begin_tbs], end_tbs-begin_tbs);
+ SHA1_Final(sha_dgst, &sha_ctx);
+ x509_ctx->digest = bi_import(bi_ctx, sha_dgst, SHA1_SIZE);
+ }
+ else if (x509_ctx->sig_type == SIG_TYPE_MD2)
+ {
+ MD2_CTX md2_ctx;
+ uint8_t md2_dgst[MD2_SIZE];
+ MD2_Init(&md2_ctx);
+ MD2_Update(&md2_ctx, &cert[begin_tbs], end_tbs-begin_tbs);
+ MD2_Final(md2_dgst, &md2_ctx);
+ x509_ctx->digest = bi_import(bi_ctx, md2_dgst, MD2_SIZE);
+ }
+
+ if (cert[offset] == ASN1_V3_DATA)
+ {
+ int suboffset;
+
+ ++offset;
+ get_asn1_length(cert, &offset);
+
+ if ((suboffset = asn1_find_subjectaltname(cert, offset)) > 0)
+ {
+ if (asn1_next_obj(cert, &suboffset, ASN1_OCTET_STRING) > 0)
+ {
+ int altlen;
+
+ if ((altlen = asn1_next_obj(cert,
+ &suboffset, ASN1_SEQUENCE)) > 0)
+ {
+ int endalt = suboffset + altlen;
+ int totalnames = 0;
+
+ while (suboffset < endalt)
+ {
+ int type = cert[suboffset++];
+ int dnslen = get_asn1_length(cert, &suboffset);
+
+ if (type == ASN1_CONTEXT_DNSNAME)
+ {
+ x509_ctx->subject_alt_dnsnames = (char**)
+ realloc(x509_ctx->subject_alt_dnsnames,
+ (totalnames + 2) * sizeof(char*));
+ x509_ctx->subject_alt_dnsnames[totalnames] =
+ (char*)malloc(dnslen + 1);
+ x509_ctx->subject_alt_dnsnames[totalnames+1] = NULL;
+ memcpy(x509_ctx->subject_alt_dnsnames[totalnames],
+ cert + suboffset, dnslen);
+ x509_ctx->subject_alt_dnsnames[
+ totalnames][dnslen] = 0;
+ ++totalnames;
+ }
+
+ suboffset += dnslen;
+ }
+ }
+ }
+ }
+ }
+
+ offset = end_tbs; /* skip the rest of v3 data */
+ if (asn1_skip_obj(cert, &offset, ASN1_SEQUENCE) ||
+ asn1_signature(cert, &offset, x509_ctx))
+ goto end_cert;
+#endif
+ ret = X509_OK;
+end_cert:
+ if (len)
+ {
+ *len = cert_size;
+ }
+
+ if (ret)
+ {
+#ifdef CONFIG_SSL_FULL_MODE
+ printf("Error: Invalid X509 ASN.1 file (%s)\n",
+ x509_display_error(ret));
+#endif
+ x509_free(x509_ctx);
+ *ctx = NULL;
+ }
+
+ return ret;
+}
+
+/**
+ * Free an X.509 object's resources.
+ */
+void x509_free(X509_CTX *x509_ctx)
+{
+ X509_CTX *next;
+ int i;
+
+ if (x509_ctx == NULL) /* if already null, then don't bother */
+ return;
+
+ for (i = 0; i < X509_NUM_DN_TYPES; i++)
+ {
+ free(x509_ctx->ca_cert_dn[i]);
+ free(x509_ctx->cert_dn[i]);
+ }
+
+ free(x509_ctx->signature);
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+ if (x509_ctx->digest)
+ {
+ bi_free(x509_ctx->rsa_ctx->bi_ctx, x509_ctx->digest);
+ }
+
+ if (x509_ctx->subject_alt_dnsnames)
+ {
+ for (i = 0; x509_ctx->subject_alt_dnsnames[i]; ++i)
+ free(x509_ctx->subject_alt_dnsnames[i]);
+
+ free(x509_ctx->subject_alt_dnsnames);
+ }
+#endif
+
+ RSA_free(x509_ctx->rsa_ctx);
+ next = x509_ctx->next;
+ free(x509_ctx);
+ x509_free(next); /* clear the chain */
+}
+
+#ifdef CONFIG_SSL_CERT_VERIFICATION
+/**
+ * Take a signature and decrypt it.
+ */
+static bigint *sig_verify(BI_CTX *ctx, const uint8_t *sig, int sig_len,
+ bigint *modulus, bigint *pub_exp)
+{
+ int i, size;
+ bigint *decrypted_bi, *dat_bi;
+ bigint *bir = NULL;
+ uint8_t *block = (uint8_t *)alloca(sig_len);
+
+ /* decrypt */
+ dat_bi = bi_import(ctx, sig, sig_len);
+ ctx->mod_offset = BIGINT_M_OFFSET;
+
+ /* convert to a normal block */
+ decrypted_bi = bi_mod_power2(ctx, dat_bi, modulus, pub_exp);
+
+ bi_export(ctx, decrypted_bi, block, sig_len);
+ ctx->mod_offset = BIGINT_M_OFFSET;
+
+ i = 10; /* start at the first possible non-padded byte */
+ while (block[i++] && i < sig_len);
+ size = sig_len - i;
+
+ /* get only the bit we want */
+ if (size > 0)
+ {
+ int len;
+ const uint8_t *sig_ptr = get_signature(&block[i], &len);
+
+ if (sig_ptr)
+ {
+ bir = bi_import(ctx, sig_ptr, len);
+ }
+ }
+
+ /* save a few bytes of memory */
+ bi_clear_cache(ctx);
+ return bir;
+}
+
+/**
+ * Do some basic checks on the certificate chain.
+ *
+ * Certificate verification consists of a number of checks:
+ * - The date of the certificate is after the start date.
+ * - The date of the certificate is before the finish date.
+ * - A root certificate exists in the certificate store.
+ * - That the certificate(s) are not self-signed.
+ * - The certificate chain is valid.
+ * - The signature of the certificate is valid.
+ */
+int x509_verify(const CA_CERT_CTX *ca_cert_ctx, const X509_CTX *cert)
+{
+ int ret = X509_OK, i = 0;
+ bigint *cert_sig;
+ X509_CTX *next_cert = NULL;
+ BI_CTX *ctx = NULL;
+ bigint *mod = NULL, *expn = NULL;
+ int match_ca_cert = 0;
+ struct timeval tv;
+ uint8_t is_self_signed = 0;
+
+ if (cert == NULL)
+ {
+ ret = X509_VFY_ERROR_NO_TRUSTED_CERT;
+ goto end_verify;
+ }
+
+ /* a self-signed certificate that is not in the CA store - use this
+ to check the signature */
+ if (asn1_compare_dn(cert->ca_cert_dn, cert->cert_dn) == 0)
+ {
+ is_self_signed = 1;
+ ctx = cert->rsa_ctx->bi_ctx;
+ mod = cert->rsa_ctx->m;
+ expn = cert->rsa_ctx->e;
+ }
+
+ gettimeofday(&tv, NULL);
+
+ /* check the not before date */
+ if (tv.tv_sec < cert->not_before)
+ {
+ ret = X509_VFY_ERROR_NOT_YET_VALID;
+ goto end_verify;
+ }
+
+ /* check the not after date */
+ if (tv.tv_sec > cert->not_after)
+ {
+ ret = X509_VFY_ERROR_EXPIRED;
+ goto end_verify;
+ }
+
+ next_cert = cert->next;
+
+ /* last cert in the chain - look for a trusted cert */
+ if (next_cert == NULL)
+ {
+ if (ca_cert_ctx != NULL)
+ {
+ /* go thu the CA store */
+ while (i < CONFIG_X509_MAX_CA_CERTS && ca_cert_ctx->cert[i])
+ {
+ if (asn1_compare_dn(cert->ca_cert_dn,
+ ca_cert_ctx->cert[i]->cert_dn) == 0)
+ {
+ /* use this CA certificate for signature verification */
+ match_ca_cert = 1;
+ ctx = ca_cert_ctx->cert[i]->rsa_ctx->bi_ctx;
+ mod = ca_cert_ctx->cert[i]->rsa_ctx->m;
+ expn = ca_cert_ctx->cert[i]->rsa_ctx->e;
+ break;
+ }
+
+ i++;
+ }
+ }
+
+ /* couldn't find a trusted cert (& let self-signed errors
+ be returned) */
+ if (!match_ca_cert && !is_self_signed)
+ {
+ ret = X509_VFY_ERROR_NO_TRUSTED_CERT;
+ goto end_verify;
+ }
+ }
+ else if (asn1_compare_dn(cert->ca_cert_dn, next_cert->cert_dn) != 0)
+ {
+ /* check the chain */
+ ret = X509_VFY_ERROR_INVALID_CHAIN;
+ goto end_verify;
+ }
+ else /* use the next certificate in the chain for signature verify */
+ {
+ ctx = next_cert->rsa_ctx->bi_ctx;
+ mod = next_cert->rsa_ctx->m;
+ expn = next_cert->rsa_ctx->e;
+ }
+
+ /* cert is self signed */
+ if (!match_ca_cert && is_self_signed)
+ {
+ ret = X509_VFY_ERROR_SELF_SIGNED;
+ goto end_verify;
+ }
+
+ /* check the signature */
+ cert_sig = sig_verify(ctx, cert->signature, cert->sig_len,
+ bi_clone(ctx, mod), bi_clone(ctx, expn));
+
+ if (cert_sig && cert->digest)
+ {
+ if (bi_compare(cert_sig, cert->digest) != 0)
+ ret = X509_VFY_ERROR_BAD_SIGNATURE;
+
+
+ bi_free(ctx, cert_sig);
+ }
+ else
+ {
+ ret = X509_VFY_ERROR_BAD_SIGNATURE;
+ }
+
+ if (ret)
+ goto end_verify;
+
+ /* go down the certificate chain using recursion. */
+ if (next_cert != NULL)
+ {
+ ret = x509_verify(ca_cert_ctx, next_cert);
+ }
+
+end_verify:
+ return ret;
+}
+#endif
+
+#if defined (CONFIG_SSL_FULL_MODE)
+/**
+ * Used for diagnostics.
+ */
+static const char *not_part_of_cert = "<Not Part Of Certificate>";
+void x509_print(const X509_CTX *cert, CA_CERT_CTX *ca_cert_ctx)
+{
+ if (cert == NULL)
+ return;
+
+ printf("=== CERTIFICATE ISSUED TO ===\n");
+ printf("Common Name (CN):\t\t");
+ printf("%s\n", cert->cert_dn[X509_COMMON_NAME] ?
+ cert->cert_dn[X509_COMMON_NAME] : not_part_of_cert);
+
+ printf("Organization (O):\t\t");
+ printf("%s\n", cert->cert_dn[X509_ORGANIZATION] ?
+ cert->cert_dn[X509_ORGANIZATION] : not_part_of_cert);
+
+ printf("Organizational Unit (OU):\t");
+ printf("%s\n", cert->cert_dn[X509_ORGANIZATIONAL_UNIT] ?
+ cert->cert_dn[X509_ORGANIZATIONAL_UNIT] : not_part_of_cert);
+
+ printf("=== CERTIFICATE ISSUED BY ===\n");
+ printf("Common Name (CN):\t\t");
+ printf("%s\n", cert->ca_cert_dn[X509_COMMON_NAME] ?
+ cert->ca_cert_dn[X509_COMMON_NAME] : not_part_of_cert);
+
+ printf("Organization (O):\t\t");
+ printf("%s\n", cert->ca_cert_dn[X509_ORGANIZATION] ?
+ cert->ca_cert_dn[X509_ORGANIZATION] : not_part_of_cert);
+
+ printf("Organizational Unit (OU):\t");
+ printf("%s\n", cert->ca_cert_dn[X509_ORGANIZATIONAL_UNIT] ?
+ cert->ca_cert_dn[X509_ORGANIZATIONAL_UNIT] : not_part_of_cert);
+
+ printf("Not Before:\t\t\t%s", ctime(&cert->not_before));
+ printf("Not After:\t\t\t%s", ctime(&cert->not_after));
+ printf("RSA bitsize:\t\t\t%d\n", cert->rsa_ctx->num_octets*8);
+ printf("Sig Type:\t\t\t");
+ switch (cert->sig_type)
+ {
+ case SIG_TYPE_MD5:
+ printf("MD5\n");
+ break;
+ case SIG_TYPE_SHA1:
+ printf("SHA1\n");
+ break;
+ case SIG_TYPE_MD2:
+ printf("MD2\n");
+ break;
+ default:
+ printf("Unrecognized: %d\n", cert->sig_type);
+ break;
+ }
+
+ if (ca_cert_ctx)
+ {
+ printf("Verify:\t\t\t\t%s\n",
+ x509_display_error(x509_verify(ca_cert_ctx, cert)));
+ }
+
+#if 0
+ print_blob("Signature", cert->signature, cert->sig_len);
+ bi_print("Modulus", cert->rsa_ctx->m);
+ bi_print("Pub Exp", cert->rsa_ctx->e);
+#endif
+
+ if (ca_cert_ctx)
+ {
+ x509_print(cert->next, ca_cert_ctx);
+ }
+
+ TTY_FLUSH();
+}
+
+const char * x509_display_error(int error)
+{
+ switch (error)
+ {
+ case X509_OK:
+ return "Certificate verify successful";
+
+ case X509_NOT_OK:
+ return "X509 not ok";
+
+ case X509_VFY_ERROR_NO_TRUSTED_CERT:
+ return "No trusted cert is available";
+
+ case X509_VFY_ERROR_BAD_SIGNATURE:
+ return "Bad signature";
+
+ case X509_VFY_ERROR_NOT_YET_VALID:
+ return "Cert is not yet valid";
+
+ case X509_VFY_ERROR_EXPIRED:
+ return "Cert has expired";
+
+ case X509_VFY_ERROR_SELF_SIGNED:
+ return "Cert is self-signed";
+
+ case X509_VFY_ERROR_INVALID_CHAIN:
+ return "Chain is invalid (check order of certs)";
+
+ case X509_VFY_ERROR_UNSUPPORTED_DIGEST:
+ return "Unsupported digest";
+
+ case X509_INVALID_PRIV_KEY:
+ return "Invalid private key";
+
+ default:
+ return "Unknown";
+ }
+}
+#endif /* CONFIG_SSL_FULL_MODE */
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-28 00:33:20 +0000