From 02f5c2ed34d16c9809b488b5a5082c40bb0f3188 Mon Sep 17 00:00:00 2001 From: Michał Cichoń Date: Thu, 27 Aug 2015 21:12:00 +0200 Subject: Remove libcurl as it was replaced by WinHTTP. --- libcurl/src/lib/vtls/nss.c | 2006 -------------------------------------------- 1 file changed, 2006 deletions(-) delete mode 100644 libcurl/src/lib/vtls/nss.c (limited to 'libcurl/src/lib/vtls/nss.c') diff --git a/libcurl/src/lib/vtls/nss.c b/libcurl/src/lib/vtls/nss.c deleted file mode 100644 index 1c17612..0000000 --- a/libcurl/src/lib/vtls/nss.c +++ /dev/null @@ -1,2006 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2015, Daniel Stenberg, , et al. - * - * This software is licensed as described in the file COPYING, which - * you should have received as part of this distribution. The terms - * are also available at http://curl.haxx.se/docs/copyright.html. - * - * You may opt to use, copy, modify, merge, publish, distribute and/or sell - * copies of the Software, and permit persons to whom the Software is - * furnished to do so, under the terms of the COPYING file. - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ***************************************************************************/ - -/* - * Source file for all NSS-specific code for the TLS/SSL layer. No code - * but vtls.c should ever call or use these functions. - */ - -#include "../curl_setup.h" - -#ifdef USE_NSS - -#include "urldata.h" -#include "sendf.h" -#include "formdata.h" /* for the boundary function */ -#include "url.h" /* for the ssl config check function */ -#include "connect.h" -#include "strequal.h" -#include "select.h" -#include "vtls.h" -#include "llist.h" -#include "curl_printf.h" -#include "nssg.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define NSSVERNUM ((NSS_VMAJOR<<16)|(NSS_VMINOR<<8)|NSS_VPATCH) - -#if NSSVERNUM >= 0x030f00 /* 3.15.0 */ -#include -#endif - -#include "rawstr.h" -#include "warnless.h" -#include "x509asn1.h" - -/* The last #include files should be: */ -#include "curl_memory.h" -#include "memdebug.h" - -#define SSL_DIR "/etc/pki/nssdb" - -/* enough to fit the string "PEM Token #[0|1]" */ -#define SLOTSIZE 13 - -PRFileDesc *PR_ImportTCPSocket(PRInt32 osfd); - -PRLock * nss_initlock = NULL; -PRLock * nss_crllock = NULL; -struct curl_llist *nss_crl_list = NULL; -NSSInitContext * nss_context = NULL; - -volatile int initialized = 0; - -typedef struct { - const char *name; - int num; -} cipher_s; - -#define PK11_SETATTRS(_attr, _idx, _type, _val, _len) do { \ - CK_ATTRIBUTE *ptr = (_attr) + ((_idx)++); \ - ptr->type = (_type); \ - ptr->pValue = (_val); \ - ptr->ulValueLen = (_len); \ -} WHILE_FALSE - -#define CERT_NewTempCertificate __CERT_NewTempCertificate - -#define NUM_OF_CIPHERS sizeof(cipherlist)/sizeof(cipherlist[0]) -static const cipher_s cipherlist[] = { - /* SSL2 cipher suites */ - {"rc4", SSL_EN_RC4_128_WITH_MD5}, - {"rc4-md5", SSL_EN_RC4_128_WITH_MD5}, - {"rc4export", SSL_EN_RC4_128_EXPORT40_WITH_MD5}, - {"rc2", SSL_EN_RC2_128_CBC_WITH_MD5}, - {"rc2export", SSL_EN_RC2_128_CBC_EXPORT40_WITH_MD5}, - {"des", SSL_EN_DES_64_CBC_WITH_MD5}, - {"desede3", SSL_EN_DES_192_EDE3_CBC_WITH_MD5}, - /* SSL3/TLS cipher suites */ - {"rsa_rc4_128_md5", SSL_RSA_WITH_RC4_128_MD5}, - {"rsa_rc4_128_sha", SSL_RSA_WITH_RC4_128_SHA}, - {"rsa_3des_sha", SSL_RSA_WITH_3DES_EDE_CBC_SHA}, - {"rsa_des_sha", SSL_RSA_WITH_DES_CBC_SHA}, - {"rsa_rc4_40_md5", SSL_RSA_EXPORT_WITH_RC4_40_MD5}, - {"rsa_rc2_40_md5", SSL_RSA_EXPORT_WITH_RC2_CBC_40_MD5}, - {"rsa_null_md5", SSL_RSA_WITH_NULL_MD5}, - {"rsa_null_sha", SSL_RSA_WITH_NULL_SHA}, - {"fips_3des_sha", SSL_RSA_FIPS_WITH_3DES_EDE_CBC_SHA}, - {"fips_des_sha", SSL_RSA_FIPS_WITH_DES_CBC_SHA}, - {"fortezza", SSL_FORTEZZA_DMS_WITH_FORTEZZA_CBC_SHA}, - {"fortezza_rc4_128_sha", SSL_FORTEZZA_DMS_WITH_RC4_128_SHA}, - {"fortezza_null", SSL_FORTEZZA_DMS_WITH_NULL_SHA}, - /* TLS 1.0: Exportable 56-bit Cipher Suites. */ - {"rsa_des_56_sha", TLS_RSA_EXPORT1024_WITH_DES_CBC_SHA}, - {"rsa_rc4_56_sha", TLS_RSA_EXPORT1024_WITH_RC4_56_SHA}, - /* AES ciphers. */ - {"dhe_dss_aes_128_cbc_sha", TLS_DHE_DSS_WITH_AES_128_CBC_SHA}, - {"dhe_dss_aes_256_cbc_sha", TLS_DHE_DSS_WITH_AES_256_CBC_SHA}, - {"dhe_rsa_aes_128_cbc_sha", TLS_DHE_RSA_WITH_AES_128_CBC_SHA}, - {"dhe_rsa_aes_256_cbc_sha", TLS_DHE_RSA_WITH_AES_256_CBC_SHA}, - {"rsa_aes_128_sha", TLS_RSA_WITH_AES_128_CBC_SHA}, - {"rsa_aes_256_sha", TLS_RSA_WITH_AES_256_CBC_SHA}, - /* ECC ciphers. */ - {"ecdh_ecdsa_null_sha", TLS_ECDH_ECDSA_WITH_NULL_SHA}, - {"ecdh_ecdsa_rc4_128_sha", TLS_ECDH_ECDSA_WITH_RC4_128_SHA}, - {"ecdh_ecdsa_3des_sha", TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA}, - {"ecdh_ecdsa_aes_128_sha", TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA}, - {"ecdh_ecdsa_aes_256_sha", TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA}, - {"ecdhe_ecdsa_null_sha", TLS_ECDHE_ECDSA_WITH_NULL_SHA}, - {"ecdhe_ecdsa_rc4_128_sha", TLS_ECDHE_ECDSA_WITH_RC4_128_SHA}, - {"ecdhe_ecdsa_3des_sha", TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA}, - {"ecdhe_ecdsa_aes_128_sha", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA}, - {"ecdhe_ecdsa_aes_256_sha", TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA}, - {"ecdh_rsa_null_sha", TLS_ECDH_RSA_WITH_NULL_SHA}, - {"ecdh_rsa_128_sha", TLS_ECDH_RSA_WITH_RC4_128_SHA}, - {"ecdh_rsa_3des_sha", TLS_ECDH_RSA_WITH_3DES_EDE_CBC_SHA}, - {"ecdh_rsa_aes_128_sha", TLS_ECDH_RSA_WITH_AES_128_CBC_SHA}, - {"ecdh_rsa_aes_256_sha", TLS_ECDH_RSA_WITH_AES_256_CBC_SHA}, - {"echde_rsa_null", TLS_ECDHE_RSA_WITH_NULL_SHA}, - {"ecdhe_rsa_rc4_128_sha", TLS_ECDHE_RSA_WITH_RC4_128_SHA}, - {"ecdhe_rsa_3des_sha", TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA}, - {"ecdhe_rsa_aes_128_sha", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA}, - {"ecdhe_rsa_aes_256_sha", TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA}, - {"ecdh_anon_null_sha", TLS_ECDH_anon_WITH_NULL_SHA}, - {"ecdh_anon_rc4_128sha", TLS_ECDH_anon_WITH_RC4_128_SHA}, - {"ecdh_anon_3des_sha", TLS_ECDH_anon_WITH_3DES_EDE_CBC_SHA}, - {"ecdh_anon_aes_128_sha", TLS_ECDH_anon_WITH_AES_128_CBC_SHA}, - {"ecdh_anon_aes_256_sha", TLS_ECDH_anon_WITH_AES_256_CBC_SHA}, -#ifdef TLS_RSA_WITH_NULL_SHA256 - /* new HMAC-SHA256 cipher suites specified in RFC */ - {"rsa_null_sha_256", TLS_RSA_WITH_NULL_SHA256}, - {"rsa_aes_128_cbc_sha_256", TLS_RSA_WITH_AES_128_CBC_SHA256}, - {"rsa_aes_256_cbc_sha_256", TLS_RSA_WITH_AES_256_CBC_SHA256}, - {"dhe_rsa_aes_128_cbc_sha_256", TLS_DHE_RSA_WITH_AES_128_CBC_SHA256}, - {"dhe_rsa_aes_256_cbc_sha_256", TLS_DHE_RSA_WITH_AES_256_CBC_SHA256}, - {"ecdhe_ecdsa_aes_128_cbc_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256}, - {"ecdhe_rsa_aes_128_cbc_sha_256", TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256}, -#endif -#ifdef TLS_RSA_WITH_AES_128_GCM_SHA256 - /* AES GCM cipher suites in RFC 5288 and RFC 5289 */ - {"rsa_aes_128_gcm_sha_256", TLS_RSA_WITH_AES_128_GCM_SHA256}, - {"dhe_rsa_aes_128_gcm_sha_256", TLS_DHE_RSA_WITH_AES_128_GCM_SHA256}, - {"dhe_dss_aes_128_gcm_sha_256", TLS_DHE_DSS_WITH_AES_128_GCM_SHA256}, - {"ecdhe_ecdsa_aes_128_gcm_sha_256", TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256}, - {"ecdh_ecdsa_aes_128_gcm_sha_256", TLS_ECDH_ECDSA_WITH_AES_128_GCM_SHA256}, - {"ecdhe_rsa_aes_128_gcm_sha_256", TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256}, - {"ecdh_rsa_aes_128_gcm_sha_256", TLS_ECDH_RSA_WITH_AES_128_GCM_SHA256}, -#endif -}; - -static const char* pem_library = "libnsspem.so"; -SECMODModule* mod = NULL; - -/* NSPR I/O layer we use to detect blocking direction during SSL handshake */ -static PRDescIdentity nspr_io_identity = PR_INVALID_IO_LAYER; -static PRIOMethods nspr_io_methods; - -static const char* nss_error_to_name(PRErrorCode code) -{ - const char *name = PR_ErrorToName(code); - if(name) - return name; - - return "unknown error"; -} - -static void nss_print_error_message(struct SessionHandle *data, PRUint32 err) -{ - failf(data, "%s", PR_ErrorToString(err, PR_LANGUAGE_I_DEFAULT)); -} - -static SECStatus set_ciphers(struct SessionHandle *data, PRFileDesc * model, - char *cipher_list) -{ - unsigned int i; - PRBool cipher_state[NUM_OF_CIPHERS]; - PRBool found; - char *cipher; - - /* First disable all ciphers. This uses a different max value in case - * NSS adds more ciphers later we don't want them available by - * accident - */ - for(i=0; iset.str[cert_kind]; - const char *n; - - if(!is_file(str)) - /* no such file exists, use the string as nickname */ - return strdup(str); - - /* search the last slash; we require at least one slash in a file name */ - n = strrchr(str, '/'); - if(!n) { - infof(data, "warning: certificate file name \"%s\" handled as nickname; " - "please use \"./%s\" to force file name\n", str, str); - return strdup(str); - } - - /* we'll use the PEM reader to read the certificate from file */ - return NULL; -} - -/* Call PK11_CreateGenericObject() with the given obj_class and filename. If - * the call succeeds, append the object handle to the list of objects so that - * the object can be destroyed in Curl_nss_close(). */ -static CURLcode nss_create_object(struct ssl_connect_data *ssl, - CK_OBJECT_CLASS obj_class, - const char *filename, bool cacert) -{ - PK11SlotInfo *slot; - PK11GenericObject *obj; - CK_BBOOL cktrue = CK_TRUE; - CK_BBOOL ckfalse = CK_FALSE; - CK_ATTRIBUTE attrs[/* max count of attributes */ 4]; - int attr_cnt = 0; - CURLcode result = (cacert) - ? CURLE_SSL_CACERT_BADFILE - : CURLE_SSL_CERTPROBLEM; - - const int slot_id = (cacert) ? 0 : 1; - char *slot_name = aprintf("PEM Token #%d", slot_id); - if(!slot_name) - return CURLE_OUT_OF_MEMORY; - - slot = PK11_FindSlotByName(slot_name); - free(slot_name); - if(!slot) - return result; - - PK11_SETATTRS(attrs, attr_cnt, CKA_CLASS, &obj_class, sizeof(obj_class)); - PK11_SETATTRS(attrs, attr_cnt, CKA_TOKEN, &cktrue, sizeof(CK_BBOOL)); - PK11_SETATTRS(attrs, attr_cnt, CKA_LABEL, (unsigned char *)filename, - strlen(filename) + 1); - - if(CKO_CERTIFICATE == obj_class) { - CK_BBOOL *pval = (cacert) ? (&cktrue) : (&ckfalse); - PK11_SETATTRS(attrs, attr_cnt, CKA_TRUST, pval, sizeof(*pval)); - } - - obj = PK11_CreateGenericObject(slot, attrs, attr_cnt, PR_FALSE); - PK11_FreeSlot(slot); - if(!obj) - return result; - - if(!Curl_llist_insert_next(ssl->obj_list, ssl->obj_list->tail, obj)) { - PK11_DestroyGenericObject(obj); - return CURLE_OUT_OF_MEMORY; - } - - if(!cacert && CKO_CERTIFICATE == obj_class) - /* store reference to a client certificate */ - ssl->obj_clicert = obj; - - return CURLE_OK; -} - -/* Destroy the NSS object whose handle is given by ptr. This function is - * a callback of Curl_llist_alloc() used by Curl_llist_destroy() to destroy - * NSS objects in Curl_nss_close() */ -static void nss_destroy_object(void *user, void *ptr) -{ - PK11GenericObject *obj = (PK11GenericObject *)ptr; - (void) user; - PK11_DestroyGenericObject(obj); -} - -/* same as nss_destroy_object() but for CRL items */ -static void nss_destroy_crl_item(void *user, void *ptr) -{ - SECItem *crl_der = (SECItem *)ptr; - (void) user; - SECITEM_FreeItem(crl_der, PR_TRUE); -} - -static CURLcode nss_load_cert(struct ssl_connect_data *ssl, - const char *filename, PRBool cacert) -{ - CURLcode result = (cacert) - ? CURLE_SSL_CACERT_BADFILE - : CURLE_SSL_CERTPROBLEM; - - /* libnsspem.so leaks memory if the requested file does not exist. For more - * details, go to . */ - if(is_file(filename)) - result = nss_create_object(ssl, CKO_CERTIFICATE, filename, cacert); - - if(!result && !cacert) { - /* we have successfully loaded a client certificate */ - CERTCertificate *cert; - char *nickname = NULL; - char *n = strrchr(filename, '/'); - if(n) - n++; - - /* The following undocumented magic helps to avoid a SIGSEGV on call - * of PK11_ReadRawAttribute() from SelectClientCert() when using an - * immature version of libnsspem.so. For more details, go to - * . */ - nickname = aprintf("PEM Token #1:%s", n); - if(nickname) { - cert = PK11_FindCertFromNickname(nickname, NULL); - if(cert) - CERT_DestroyCertificate(cert); - - free(nickname); - } - } - - return result; -} - -/* add given CRL to cache if it is not already there */ -static CURLcode nss_cache_crl(SECItem *crl_der) -{ - CERTCertDBHandle *db = CERT_GetDefaultCertDB(); - CERTSignedCrl *crl = SEC_FindCrlByDERCert(db, crl_der, 0); - if(crl) { - /* CRL already cached */ - SEC_DestroyCrl(crl); - SECITEM_FreeItem(crl_der, PR_TRUE); - return CURLE_OK; - } - - /* acquire lock before call of CERT_CacheCRL() and accessing nss_crl_list */ - PR_Lock(nss_crllock); - - /* store the CRL item so that we can free it in Curl_nss_cleanup() */ - if(!Curl_llist_insert_next(nss_crl_list, nss_crl_list->tail, crl_der)) { - SECITEM_FreeItem(crl_der, PR_TRUE); - PR_Unlock(nss_crllock); - return CURLE_OUT_OF_MEMORY; - } - - if(SECSuccess != CERT_CacheCRL(db, crl_der)) { - /* unable to cache CRL */ - PR_Unlock(nss_crllock); - return CURLE_SSL_CRL_BADFILE; - } - - /* we need to clear session cache, so that the CRL could take effect */ - SSL_ClearSessionCache(); - PR_Unlock(nss_crllock); - return CURLE_OK; -} - -static CURLcode nss_load_crl(const char* crlfilename) -{ - PRFileDesc *infile; - PRFileInfo info; - SECItem filedata = { 0, NULL, 0 }; - SECItem *crl_der = NULL; - char *body; - - infile = PR_Open(crlfilename, PR_RDONLY, 0); - if(!infile) - return CURLE_SSL_CRL_BADFILE; - - if(PR_SUCCESS != PR_GetOpenFileInfo(infile, &info)) - goto fail; - - if(!SECITEM_AllocItem(NULL, &filedata, info.size + /* zero ended */ 1)) - goto fail; - - if(info.size != PR_Read(infile, filedata.data, info.size)) - goto fail; - - crl_der = SECITEM_AllocItem(NULL, NULL, 0U); - if(!crl_der) - goto fail; - - /* place a trailing zero right after the visible data */ - body = (char*)filedata.data; - body[--filedata.len] = '\0'; - - body = strstr(body, "-----BEGIN"); - if(body) { - /* assume ASCII */ - char *trailer; - char *begin = PORT_Strchr(body, '\n'); - if(!begin) - begin = PORT_Strchr(body, '\r'); - if(!begin) - goto fail; - - trailer = strstr(++begin, "-----END"); - if(!trailer) - goto fail; - - /* retrieve DER from ASCII */ - *trailer = '\0'; - if(ATOB_ConvertAsciiToItem(crl_der, begin)) - goto fail; - - SECITEM_FreeItem(&filedata, PR_FALSE); - } - else - /* assume DER */ - *crl_der = filedata; - - PR_Close(infile); - return nss_cache_crl(crl_der); - -fail: - PR_Close(infile); - SECITEM_FreeItem(crl_der, PR_TRUE); - SECITEM_FreeItem(&filedata, PR_FALSE); - return CURLE_SSL_CRL_BADFILE; -} - -static CURLcode nss_load_key(struct connectdata *conn, int sockindex, - char *key_file) -{ - PK11SlotInfo *slot; - SECStatus status; - CURLcode result; - struct ssl_connect_data *ssl = conn->ssl; - - (void)sockindex; /* unused */ - - result = nss_create_object(ssl, CKO_PRIVATE_KEY, key_file, FALSE); - if(result) { - PR_SetError(SEC_ERROR_BAD_KEY, 0); - return result; - } - - slot = PK11_FindSlotByName("PEM Token #1"); - if(!slot) - return CURLE_SSL_CERTPROBLEM; - - /* This will force the token to be seen as re-inserted */ - SECMOD_WaitForAnyTokenEvent(mod, 0, 0); - PK11_IsPresent(slot); - - status = PK11_Authenticate(slot, PR_TRUE, - conn->data->set.str[STRING_KEY_PASSWD]); - PK11_FreeSlot(slot); - - return (SECSuccess == status) ? CURLE_OK : CURLE_SSL_CERTPROBLEM; -} - -static int display_error(struct connectdata *conn, PRInt32 err, - const char *filename) -{ - switch(err) { - case SEC_ERROR_BAD_PASSWORD: - failf(conn->data, "Unable to load client key: Incorrect password"); - return 1; - case SEC_ERROR_UNKNOWN_CERT: - failf(conn->data, "Unable to load certificate %s", filename); - return 1; - default: - break; - } - return 0; /* The caller will print a generic error */ -} - -static CURLcode cert_stuff(struct connectdata *conn, int sockindex, - char *cert_file, char *key_file) -{ - struct SessionHandle *data = conn->data; - CURLcode result; - - if(cert_file) { - result = nss_load_cert(&conn->ssl[sockindex], cert_file, PR_FALSE); - if(result) { - const PRErrorCode err = PR_GetError(); - if(!display_error(conn, err, cert_file)) { - const char *err_name = nss_error_to_name(err); - failf(data, "unable to load client cert: %d (%s)", err, err_name); - } - - return result; - } - } - - if(key_file || (is_file(cert_file))) { - if(key_file) - result = nss_load_key(conn, sockindex, key_file); - else - /* In case the cert file also has the key */ - result = nss_load_key(conn, sockindex, cert_file); - if(result) { - const PRErrorCode err = PR_GetError(); - if(!display_error(conn, err, key_file)) { - const char *err_name = nss_error_to_name(err); - failf(data, "unable to load client key: %d (%s)", err, err_name); - } - - return result; - } - } - - return CURLE_OK; -} - -static char * nss_get_password(PK11SlotInfo * slot, PRBool retry, void *arg) -{ - (void)slot; /* unused */ - - if(retry || NULL == arg) - return NULL; - else - return (char *)PORT_Strdup((char *)arg); -} - -/* bypass the default SSL_AuthCertificate() hook in case we do not want to - * verify peer */ -static SECStatus nss_auth_cert_hook(void *arg, PRFileDesc *fd, PRBool checksig, - PRBool isServer) -{ - struct connectdata *conn = (struct connectdata *)arg; - -#ifdef SSL_ENABLE_OCSP_STAPLING - if(conn->data->set.ssl.verifystatus) { - SECStatus cacheResult; - - const SECItemArray *csa = SSL_PeerStapledOCSPResponses(fd); - if(!csa) { - failf(conn->data, "Invalid OCSP response"); - return SECFailure; - } - - if(csa->len == 0) { - failf(conn->data, "No OCSP response received"); - return SECFailure; - } - - cacheResult = CERT_CacheOCSPResponseFromSideChannel( - CERT_GetDefaultCertDB(), SSL_PeerCertificate(fd), - PR_Now(), &csa->items[0], arg - ); - - if(cacheResult != SECSuccess) { - failf(conn->data, "Invalid OCSP response"); - return cacheResult; - } - } -#endif - - if(!conn->data->set.ssl.verifypeer) { - infof(conn->data, "skipping SSL peer certificate verification\n"); - return SECSuccess; - } - - return SSL_AuthCertificate(CERT_GetDefaultCertDB(), fd, checksig, isServer); -} - -/** - * Inform the application that the handshake is complete. - */ -static void HandshakeCallback(PRFileDesc *sock, void *arg) -{ - struct connectdata *conn = (struct connectdata*) arg; - unsigned int buflenmax = 50; - unsigned char buf[50]; - unsigned int buflen; - SSLNextProtoState state; - - if(!conn->data->set.ssl_enable_npn && !conn->data->set.ssl_enable_alpn) { - return; - } - - if(SSL_GetNextProto(sock, &state, buf, &buflen, buflenmax) == SECSuccess) { - - switch(state) { - case SSL_NEXT_PROTO_NO_SUPPORT: - case SSL_NEXT_PROTO_NO_OVERLAP: - infof(conn->data, "ALPN/NPN, server did not agree to a protocol\n"); - return; -#ifdef SSL_ENABLE_ALPN - case SSL_NEXT_PROTO_SELECTED: - infof(conn->data, "ALPN, server accepted to use %.*s\n", buflen, buf); - break; -#endif - case SSL_NEXT_PROTO_NEGOTIATED: - infof(conn->data, "NPN, server accepted to use %.*s\n", buflen, buf); - break; - } - -#ifdef USE_NGHTTP2 - if(buflen == NGHTTP2_PROTO_VERSION_ID_LEN && - !memcmp(NGHTTP2_PROTO_VERSION_ID, buf, NGHTTP2_PROTO_VERSION_ID_LEN)) { - conn->negnpn = CURL_HTTP_VERSION_2_0; - } - else -#endif - if(buflen == ALPN_HTTP_1_1_LENGTH && - !memcmp(ALPN_HTTP_1_1, buf, ALPN_HTTP_1_1_LENGTH)) { - conn->negnpn = CURL_HTTP_VERSION_1_1; - } - } -} - -static SECStatus CanFalseStartCallback(PRFileDesc *sock, void *client_data, - PRBool *canFalseStart) -{ - struct connectdata *conn = client_data; - struct SessionHandle *data = conn->data; - - SSLChannelInfo channelInfo; - SSLCipherSuiteInfo cipherInfo; - - SECStatus rv; - PRBool negotiatedExtension; - - *canFalseStart = PR_FALSE; - - if(SSL_GetChannelInfo(sock, &channelInfo, sizeof(channelInfo)) != SECSuccess) - return SECFailure; - - if(SSL_GetCipherSuiteInfo(channelInfo.cipherSuite, &cipherInfo, - sizeof(cipherInfo)) != SECSuccess) - return SECFailure; - - /* Prevent version downgrade attacks from TLS 1.2, and avoid False Start for - * TLS 1.3 and later. See https://bugzilla.mozilla.org/show_bug.cgi?id=861310 - */ - if(channelInfo.protocolVersion != SSL_LIBRARY_VERSION_TLS_1_2) - goto end; - - /* Only allow ECDHE key exchange algorithm. - * See https://bugzilla.mozilla.org/show_bug.cgi?id=952863 */ - if(cipherInfo.keaType != ssl_kea_ecdh) - goto end; - - /* Prevent downgrade attacks on the symmetric cipher. We do not allow CBC - * mode due to BEAST, POODLE, and other attacks on the MAC-then-Encrypt - * design. See https://bugzilla.mozilla.org/show_bug.cgi?id=1109766 */ - if(cipherInfo.symCipher != ssl_calg_aes_gcm) - goto end; - - /* Enforce ALPN or NPN to do False Start, as an indicator of server - * compatibility. */ - rv = SSL_HandshakeNegotiatedExtension(sock, ssl_app_layer_protocol_xtn, - &negotiatedExtension); - if(rv != SECSuccess || !negotiatedExtension) { - rv = SSL_HandshakeNegotiatedExtension(sock, ssl_next_proto_nego_xtn, - &negotiatedExtension); - } - - if(rv != SECSuccess || !negotiatedExtension) - goto end; - - *canFalseStart = PR_TRUE; - - infof(data, "Trying TLS False Start\n"); - -end: - return SECSuccess; -} - -static void display_cert_info(struct SessionHandle *data, - CERTCertificate *cert) -{ - char *subject, *issuer, *common_name; - PRExplodedTime printableTime; - char timeString[256]; - PRTime notBefore, notAfter; - - subject = CERT_NameToAscii(&cert->subject); - issuer = CERT_NameToAscii(&cert->issuer); - common_name = CERT_GetCommonName(&cert->subject); - infof(data, "\tsubject: %s\n", subject); - - CERT_GetCertTimes(cert, ¬Before, ¬After); - PR_ExplodeTime(notBefore, PR_GMTParameters, &printableTime); - PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime); - infof(data, "\tstart date: %s\n", timeString); - PR_ExplodeTime(notAfter, PR_GMTParameters, &printableTime); - PR_FormatTime(timeString, 256, "%b %d %H:%M:%S %Y GMT", &printableTime); - infof(data, "\texpire date: %s\n", timeString); - infof(data, "\tcommon name: %s\n", common_name); - infof(data, "\tissuer: %s\n", issuer); - - PR_Free(subject); - PR_Free(issuer); - PR_Free(common_name); -} - -static CURLcode display_conn_info(struct connectdata *conn, PRFileDesc *sock) -{ - CURLcode result = CURLE_OK; - SSLChannelInfo channel; - SSLCipherSuiteInfo suite; - CERTCertificate *cert; - CERTCertificate *cert2; - CERTCertificate *cert3; - PRTime now; - int i; - - if(SSL_GetChannelInfo(sock, &channel, sizeof channel) == - SECSuccess && channel.length == sizeof channel && - channel.cipherSuite) { - if(SSL_GetCipherSuiteInfo(channel.cipherSuite, - &suite, sizeof suite) == SECSuccess) { - infof(conn->data, "SSL connection using %s\n", suite.cipherSuiteName); - } - } - - cert = SSL_PeerCertificate(sock); - if(cert) { - infof(conn->data, "Server certificate:\n"); - - if(!conn->data->set.ssl.certinfo) { - display_cert_info(conn->data, cert); - CERT_DestroyCertificate(cert); - } - else { - /* Count certificates in chain. */ - now = PR_Now(); - i = 1; - if(!cert->isRoot) { - cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA); - while(cert2) { - i++; - if(cert2->isRoot) { - CERT_DestroyCertificate(cert2); - break; - } - cert3 = CERT_FindCertIssuer(cert2, now, certUsageSSLCA); - CERT_DestroyCertificate(cert2); - cert2 = cert3; - } - } - - result = Curl_ssl_init_certinfo(conn->data, i); - if(!result) { - for(i = 0; cert; cert = cert2) { - result = Curl_extract_certinfo(conn, i++, (char *)cert->derCert.data, - (char *)cert->derCert.data + - cert->derCert.len); - if(result) - break; - - if(cert->isRoot) { - CERT_DestroyCertificate(cert); - break; - } - - cert2 = CERT_FindCertIssuer(cert, now, certUsageSSLCA); - CERT_DestroyCertificate(cert); - } - } - } - } - - return result; -} - -static SECStatus BadCertHandler(void *arg, PRFileDesc *sock) -{ - struct connectdata *conn = (struct connectdata *)arg; - struct SessionHandle *data = conn->data; - PRErrorCode err = PR_GetError(); - CERTCertificate *cert; - - /* remember the cert verification result */ - data->set.ssl.certverifyresult = err; - - if(err == SSL_ERROR_BAD_CERT_DOMAIN && !data->set.ssl.verifyhost) - /* we are asked not to verify the host name */ - return SECSuccess; - - /* print only info about the cert, the error is printed off the callback */ - cert = SSL_PeerCertificate(sock); - if(cert) { - infof(data, "Server certificate:\n"); - display_cert_info(data, cert); - CERT_DestroyCertificate(cert); - } - - return SECFailure; -} - -/** - * - * Check that the Peer certificate's issuer certificate matches the one found - * by issuer_nickname. This is not exactly the way OpenSSL and GNU TLS do the - * issuer check, so we provide comments that mimic the OpenSSL - * X509_check_issued function (in x509v3/v3_purp.c) - */ -static SECStatus check_issuer_cert(PRFileDesc *sock, - char *issuer_nickname) -{ - CERTCertificate *cert, *cert_issuer, *issuer; - SECStatus res=SECSuccess; - void *proto_win = NULL; - - /* - PRArenaPool *tmpArena = NULL; - CERTAuthKeyID *authorityKeyID = NULL; - SECITEM *caname = NULL; - */ - - cert = SSL_PeerCertificate(sock); - cert_issuer = CERT_FindCertIssuer(cert, PR_Now(), certUsageObjectSigner); - - proto_win = SSL_RevealPinArg(sock); - issuer = PK11_FindCertFromNickname(issuer_nickname, proto_win); - - if((!cert_issuer) || (!issuer)) - res = SECFailure; - else if(SECITEM_CompareItem(&cert_issuer->derCert, - &issuer->derCert)!=SECEqual) - res = SECFailure; - - CERT_DestroyCertificate(cert); - CERT_DestroyCertificate(issuer); - CERT_DestroyCertificate(cert_issuer); - return res; -} - -/** - * - * Callback to pick the SSL client certificate. - */ -static SECStatus SelectClientCert(void *arg, PRFileDesc *sock, - struct CERTDistNamesStr *caNames, - struct CERTCertificateStr **pRetCert, - struct SECKEYPrivateKeyStr **pRetKey) -{ - struct ssl_connect_data *connssl = (struct ssl_connect_data *)arg; - struct SessionHandle *data = connssl->data; - const char *nickname = connssl->client_nickname; - - if(connssl->obj_clicert) { - /* use the cert/key provided by PEM reader */ - static const char pem_slotname[] = "PEM Token #1"; - SECItem cert_der = { 0, NULL, 0 }; - void *proto_win = SSL_RevealPinArg(sock); - struct CERTCertificateStr *cert; - struct SECKEYPrivateKeyStr *key; - - PK11SlotInfo *slot = PK11_FindSlotByName(pem_slotname); - if(NULL == slot) { - failf(data, "NSS: PK11 slot not found: %s", pem_slotname); - return SECFailure; - } - - if(PK11_ReadRawAttribute(PK11_TypeGeneric, connssl->obj_clicert, CKA_VALUE, - &cert_der) != SECSuccess) { - failf(data, "NSS: CKA_VALUE not found in PK11 generic object"); - PK11_FreeSlot(slot); - return SECFailure; - } - - cert = PK11_FindCertFromDERCertItem(slot, &cert_der, proto_win); - SECITEM_FreeItem(&cert_der, PR_FALSE); - if(NULL == cert) { - failf(data, "NSS: client certificate from file not found"); - PK11_FreeSlot(slot); - return SECFailure; - } - - key = PK11_FindPrivateKeyFromCert(slot, cert, NULL); - PK11_FreeSlot(slot); - if(NULL == key) { - failf(data, "NSS: private key from file not found"); - CERT_DestroyCertificate(cert); - return SECFailure; - } - - infof(data, "NSS: client certificate from file\n"); - display_cert_info(data, cert); - - *pRetCert = cert; - *pRetKey = key; - return SECSuccess; - } - - /* use the default NSS hook */ - if(SECSuccess != NSS_GetClientAuthData((void *)nickname, sock, caNames, - pRetCert, pRetKey) - || NULL == *pRetCert) { - - if(NULL == nickname) - failf(data, "NSS: client certificate not found (nickname not " - "specified)"); - else - failf(data, "NSS: client certificate not found: %s", nickname); - - return SECFailure; - } - - /* get certificate nickname if any */ - nickname = (*pRetCert)->nickname; - if(NULL == nickname) - nickname = "[unknown]"; - - if(NULL == *pRetKey) { - failf(data, "NSS: private key not found for certificate: %s", nickname); - return SECFailure; - } - - infof(data, "NSS: using client certificate: %s\n", nickname); - display_cert_info(data, *pRetCert); - return SECSuccess; -} - -/* update blocking direction in case of PR_WOULD_BLOCK_ERROR */ -static void nss_update_connecting_state(ssl_connect_state state, void *secret) -{ - struct ssl_connect_data *connssl = (struct ssl_connect_data *)secret; - if(PR_GetError() != PR_WOULD_BLOCK_ERROR) - /* an unrelated error is passing by */ - return; - - switch(connssl->connecting_state) { - case ssl_connect_2: - case ssl_connect_2_reading: - case ssl_connect_2_writing: - break; - default: - /* we are not called from an SSL handshake */ - return; - } - - /* update the state accordingly */ - connssl->connecting_state = state; -} - -/* recv() wrapper we use to detect blocking direction during SSL handshake */ -static PRInt32 nspr_io_recv(PRFileDesc *fd, void *buf, PRInt32 amount, - PRIntn flags, PRIntervalTime timeout) -{ - const PRRecvFN recv_fn = fd->lower->methods->recv; - const PRInt32 rv = recv_fn(fd->lower, buf, amount, flags, timeout); - if(rv < 0) - /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */ - nss_update_connecting_state(ssl_connect_2_reading, fd->secret); - return rv; -} - -/* send() wrapper we use to detect blocking direction during SSL handshake */ -static PRInt32 nspr_io_send(PRFileDesc *fd, const void *buf, PRInt32 amount, - PRIntn flags, PRIntervalTime timeout) -{ - const PRSendFN send_fn = fd->lower->methods->send; - const PRInt32 rv = send_fn(fd->lower, buf, amount, flags, timeout); - if(rv < 0) - /* check for PR_WOULD_BLOCK_ERROR and update blocking direction */ - nss_update_connecting_state(ssl_connect_2_writing, fd->secret); - return rv; -} - -/* close() wrapper to avoid assertion failure due to fd->secret != NULL */ -static PRStatus nspr_io_close(PRFileDesc *fd) -{ - const PRCloseFN close_fn = PR_GetDefaultIOMethods()->close; - fd->secret = NULL; - return close_fn(fd); -} - -/* data might be NULL */ -static CURLcode nss_init_core(struct SessionHandle *data, const char *cert_dir) -{ - NSSInitParameters initparams; - - if(nss_context != NULL) - return CURLE_OK; - - memset((void *) &initparams, '\0', sizeof(initparams)); - initparams.length = sizeof(initparams); - - if(cert_dir) { - char *certpath = aprintf("sql:%s", cert_dir); - if(!certpath) - return CURLE_OUT_OF_MEMORY; - - infof(data, "Initializing NSS with certpath: %s\n", certpath); - nss_context = NSS_InitContext(certpath, "", "", "", &initparams, - NSS_INIT_READONLY | NSS_INIT_PK11RELOAD); - free(certpath); - - if(nss_context != NULL) - return CURLE_OK; - - infof(data, "Unable to initialize NSS database\n"); - } - - infof(data, "Initializing NSS with certpath: none\n"); - nss_context = NSS_InitContext("", "", "", "", &initparams, NSS_INIT_READONLY - | NSS_INIT_NOCERTDB | NSS_INIT_NOMODDB | NSS_INIT_FORCEOPEN - | NSS_INIT_NOROOTINIT | NSS_INIT_OPTIMIZESPACE | NSS_INIT_PK11RELOAD); - if(nss_context != NULL) - return CURLE_OK; - - infof(data, "Unable to initialize NSS\n"); - return CURLE_SSL_CACERT_BADFILE; -} - -/* data might be NULL */ -static CURLcode nss_init(struct SessionHandle *data) -{ - char *cert_dir; - struct_stat st; - CURLcode result; - - if(initialized) - return CURLE_OK; - - /* list of all CRL items we need to destroy in Curl_nss_cleanup() */ - nss_crl_list = Curl_llist_alloc(nss_destroy_crl_item); - if(!nss_crl_list) - return CURLE_OUT_OF_MEMORY; - - /* First we check if $SSL_DIR points to a valid dir */ - cert_dir = getenv("SSL_DIR"); - if(cert_dir) { - if((stat(cert_dir, &st) != 0) || - (!S_ISDIR(st.st_mode))) { - cert_dir = NULL; - } - } - - /* Now we check if the default location is a valid dir */ - if(!cert_dir) { - if((stat(SSL_DIR, &st) == 0) && - (S_ISDIR(st.st_mode))) { - cert_dir = (char *)SSL_DIR; - } - } - - if(nspr_io_identity == PR_INVALID_IO_LAYER) { - /* allocate an identity for our own NSPR I/O layer */ - nspr_io_identity = PR_GetUniqueIdentity("libcurl"); - if(nspr_io_identity == PR_INVALID_IO_LAYER) - return CURLE_OUT_OF_MEMORY; - - /* the default methods just call down to the lower I/O layer */ - memcpy(&nspr_io_methods, PR_GetDefaultIOMethods(), sizeof nspr_io_methods); - - /* override certain methods in the table by our wrappers */ - nspr_io_methods.recv = nspr_io_recv; - nspr_io_methods.send = nspr_io_send; - nspr_io_methods.close = nspr_io_close; - } - - result = nss_init_core(data, cert_dir); - if(result) - return result; - - if(num_enabled_ciphers() == 0) - NSS_SetDomesticPolicy(); - - initialized = 1; - - return CURLE_OK; -} - -/** - * Global SSL init - * - * @retval 0 error initializing SSL - * @retval 1 SSL initialized successfully - */ -CURL_STATIC int Curl_nss_init(void) -{ - /* curl_global_init() is not thread-safe so this test is ok */ - if(nss_initlock == NULL) { - PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256); - nss_initlock = PR_NewLock(); - nss_crllock = PR_NewLock(); - } - - /* We will actually initialize NSS later */ - - return 1; -} - -/* data might be NULL */ -CURL_STATIC CURLcode Curl_nss_force_init(struct SessionHandle *data) -{ - CURLcode result; - if(!nss_initlock) { - if(data) - failf(data, "unable to initialize NSS, curl_global_init() should have " - "been called with CURL_GLOBAL_SSL or CURL_GLOBAL_ALL"); - return CURLE_FAILED_INIT; - } - - PR_Lock(nss_initlock); - result = nss_init(data); - PR_Unlock(nss_initlock); - - return result; -} - -/* Global cleanup */ -CURL_STATIC void Curl_nss_cleanup(void) -{ - /* This function isn't required to be threadsafe and this is only done - * as a safety feature. - */ - PR_Lock(nss_initlock); - if(initialized) { - /* Free references to client certificates held in the SSL session cache. - * Omitting this hampers destruction of the security module owning - * the certificates. */ - SSL_ClearSessionCache(); - - if(mod && SECSuccess == SECMOD_UnloadUserModule(mod)) { - SECMOD_DestroyModule(mod); - mod = NULL; - } - NSS_ShutdownContext(nss_context); - nss_context = NULL; - } - - /* destroy all CRL items */ - Curl_llist_destroy(nss_crl_list, NULL); - nss_crl_list = NULL; - - PR_Unlock(nss_initlock); - - PR_DestroyLock(nss_initlock); - PR_DestroyLock(nss_crllock); - nss_initlock = NULL; - - initialized = 0; -} - -/* - * This function uses SSL_peek to determine connection status. - * - * Return codes: - * 1 means the connection is still in place - * 0 means the connection has been closed - * -1 means the connection status is unknown - */ -CURL_STATIC int -Curl_nss_check_cxn(struct connectdata *conn) -{ - int rc; - char buf; - - rc = - PR_Recv(conn->ssl[FIRSTSOCKET].handle, (void *)&buf, 1, PR_MSG_PEEK, - PR_SecondsToInterval(1)); - if(rc > 0) - return 1; /* connection still in place */ - - if(rc == 0) - return 0; /* connection has been closed */ - - return -1; /* connection status unknown */ -} - -/* - * This function is called when an SSL connection is closed. - */ -CURL_STATIC void Curl_nss_close(struct connectdata *conn, int sockindex) -{ - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - - if(connssl->handle) { - /* NSS closes the socket we previously handed to it, so we must mark it - as closed to avoid double close */ - fake_sclose(conn->sock[sockindex]); - conn->sock[sockindex] = CURL_SOCKET_BAD; - - if((connssl->client_nickname != NULL) || (connssl->obj_clicert != NULL)) - /* A server might require different authentication based on the - * particular path being requested by the client. To support this - * scenario, we must ensure that a connection will never reuse the - * authentication data from a previous connection. */ - SSL_InvalidateSession(connssl->handle); - - free(connssl->client_nickname); - connssl->client_nickname = NULL; - /* destroy all NSS objects in order to avoid failure of NSS shutdown */ - Curl_llist_destroy(connssl->obj_list, NULL); - connssl->obj_list = NULL; - connssl->obj_clicert = NULL; - - PR_Close(connssl->handle); - connssl->handle = NULL; - } -} - -/* return true if NSS can provide error code (and possibly msg) for the - error */ -static bool is_nss_error(CURLcode err) -{ - switch(err) { - case CURLE_PEER_FAILED_VERIFICATION: - case CURLE_SSL_CACERT: - case CURLE_SSL_CERTPROBLEM: - case CURLE_SSL_CONNECT_ERROR: - case CURLE_SSL_ISSUER_ERROR: - return true; - - default: - return false; - } -} - -/* return true if the given error code is related to a client certificate */ -static bool is_cc_error(PRInt32 err) -{ - switch(err) { - case SSL_ERROR_BAD_CERT_ALERT: - case SSL_ERROR_EXPIRED_CERT_ALERT: - case SSL_ERROR_REVOKED_CERT_ALERT: - return true; - - default: - return false; - } -} - -static Curl_recv nss_recv; -static Curl_send nss_send; - -static CURLcode nss_load_ca_certificates(struct connectdata *conn, - int sockindex) -{ - struct SessionHandle *data = conn->data; - const char *cafile = data->set.ssl.CAfile; - const char *capath = data->set.ssl.CApath; - - if(cafile) { - CURLcode result = nss_load_cert(&conn->ssl[sockindex], cafile, PR_TRUE); - if(result) - return result; - } - - if(capath) { - struct_stat st; - if(stat(capath, &st) == -1) - return CURLE_SSL_CACERT_BADFILE; - - if(S_ISDIR(st.st_mode)) { - PRDirEntry *entry; - PRDir *dir = PR_OpenDir(capath); - if(!dir) - return CURLE_SSL_CACERT_BADFILE; - - while((entry = PR_ReadDir(dir, PR_SKIP_BOTH | PR_SKIP_HIDDEN))) { - char *fullpath = aprintf("%s/%s", capath, entry->name); - if(!fullpath) { - PR_CloseDir(dir); - return CURLE_OUT_OF_MEMORY; - } - - if(CURLE_OK != nss_load_cert(&conn->ssl[sockindex], fullpath, PR_TRUE)) - /* This is purposefully tolerant of errors so non-PEM files can - * be in the same directory */ - infof(data, "failed to load '%s' from CURLOPT_CAPATH\n", fullpath); - - free(fullpath); - } - - PR_CloseDir(dir); - } - else - infof(data, "warning: CURLOPT_CAPATH not a directory (%s)\n", capath); - } - - infof(data, " CAfile: %s\n CApath: %s\n", - cafile ? cafile : "none", - capath ? capath : "none"); - - return CURLE_OK; -} - -static CURLcode nss_init_sslver(SSLVersionRange *sslver, - struct SessionHandle *data) -{ - switch(data->set.ssl.version) { - default: - case CURL_SSLVERSION_DEFAULT: - case CURL_SSLVERSION_TLSv1: - sslver->min = SSL_LIBRARY_VERSION_TLS_1_0; -#ifdef SSL_LIBRARY_VERSION_TLS_1_2 - sslver->max = SSL_LIBRARY_VERSION_TLS_1_2; -#elif defined SSL_LIBRARY_VERSION_TLS_1_1 - sslver->max = SSL_LIBRARY_VERSION_TLS_1_1; -#else - sslver->max = SSL_LIBRARY_VERSION_TLS_1_0; -#endif - return CURLE_OK; - - case CURL_SSLVERSION_SSLv2: - sslver->min = SSL_LIBRARY_VERSION_2; - sslver->max = SSL_LIBRARY_VERSION_2; - return CURLE_OK; - - case CURL_SSLVERSION_SSLv3: - sslver->min = SSL_LIBRARY_VERSION_3_0; - sslver->max = SSL_LIBRARY_VERSION_3_0; - return CURLE_OK; - - case CURL_SSLVERSION_TLSv1_0: - sslver->min = SSL_LIBRARY_VERSION_TLS_1_0; - sslver->max = SSL_LIBRARY_VERSION_TLS_1_0; - return CURLE_OK; - - case CURL_SSLVERSION_TLSv1_1: -#ifdef SSL_LIBRARY_VERSION_TLS_1_1 - sslver->min = SSL_LIBRARY_VERSION_TLS_1_1; - sslver->max = SSL_LIBRARY_VERSION_TLS_1_1; - return CURLE_OK; -#endif - break; - - case CURL_SSLVERSION_TLSv1_2: -#ifdef SSL_LIBRARY_VERSION_TLS_1_2 - sslver->min = SSL_LIBRARY_VERSION_TLS_1_2; - sslver->max = SSL_LIBRARY_VERSION_TLS_1_2; - return CURLE_OK; -#endif - break; - } - - failf(data, "TLS minor version cannot be set"); - return CURLE_SSL_CONNECT_ERROR; -} - -static CURLcode nss_fail_connect(struct ssl_connect_data *connssl, - struct SessionHandle *data, - CURLcode curlerr) -{ - PRErrorCode err = 0; - - if(is_nss_error(curlerr)) { - /* read NSPR error code */ - err = PR_GetError(); - if(is_cc_error(err)) - curlerr = CURLE_SSL_CERTPROBLEM; - - /* print the error number and error string */ - infof(data, "NSS error %d (%s)\n", err, nss_error_to_name(err)); - - /* print a human-readable message describing the error if available */ - nss_print_error_message(data, err); - } - - /* cleanup on connection failure */ - Curl_llist_destroy(connssl->obj_list, NULL); - connssl->obj_list = NULL; - - return curlerr; -} - -/* Switch the SSL socket into non-blocking mode. */ -static CURLcode nss_set_nonblock(struct ssl_connect_data *connssl, - struct SessionHandle *data) -{ - static PRSocketOptionData sock_opt; - sock_opt.option = PR_SockOpt_Nonblocking; - sock_opt.value.non_blocking = PR_TRUE; - - if(PR_SetSocketOption(connssl->handle, &sock_opt) != PR_SUCCESS) - return nss_fail_connect(connssl, data, CURLE_SSL_CONNECT_ERROR); - - return CURLE_OK; -} - -static CURLcode nss_setup_connect(struct connectdata *conn, int sockindex) -{ - PRFileDesc *model = NULL; - PRFileDesc *nspr_io = NULL; - PRFileDesc *nspr_io_stub = NULL; - PRBool ssl_no_cache; - PRBool ssl_cbc_random_iv; - struct SessionHandle *data = conn->data; - curl_socket_t sockfd = conn->sock[sockindex]; - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - CURLcode result; - - SSLVersionRange sslver = { - SSL_LIBRARY_VERSION_TLS_1_0, /* min */ - SSL_LIBRARY_VERSION_TLS_1_0 /* max */ - }; - - connssl->data = data; - - /* list of all NSS objects we need to destroy in Curl_nss_close() */ - connssl->obj_list = Curl_llist_alloc(nss_destroy_object); - if(!connssl->obj_list) - return CURLE_OUT_OF_MEMORY; - - /* FIXME. NSS doesn't support multiple databases open at the same time. */ - PR_Lock(nss_initlock); - result = nss_init(conn->data); - if(result) { - PR_Unlock(nss_initlock); - goto error; - } - - result = CURLE_SSL_CONNECT_ERROR; - - if(!mod) { - char *configstring = aprintf("library=%s name=PEM", pem_library); - if(!configstring) { - PR_Unlock(nss_initlock); - goto error; - } - mod = SECMOD_LoadUserModule(configstring, NULL, PR_FALSE); - free(configstring); - - if(!mod || !mod->loaded) { - if(mod) { - SECMOD_DestroyModule(mod); - mod = NULL; - } - infof(data, "WARNING: failed to load NSS PEM library %s. Using " - "OpenSSL PEM certificates will not work.\n", pem_library); - } - } - - PK11_SetPasswordFunc(nss_get_password); - PR_Unlock(nss_initlock); - - model = PR_NewTCPSocket(); - if(!model) - goto error; - model = SSL_ImportFD(NULL, model); - - if(SSL_OptionSet(model, SSL_SECURITY, PR_TRUE) != SECSuccess) - goto error; - if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_SERVER, PR_FALSE) != SECSuccess) - goto error; - if(SSL_OptionSet(model, SSL_HANDSHAKE_AS_CLIENT, PR_TRUE) != SECSuccess) - goto error; - - /* do not use SSL cache if disabled or we are not going to verify peer */ - ssl_no_cache = (conn->ssl_config.sessionid && data->set.ssl.verifypeer) ? - PR_FALSE : PR_TRUE; - if(SSL_OptionSet(model, SSL_NO_CACHE, ssl_no_cache) != SECSuccess) - goto error; - - /* enable/disable the requested SSL version(s) */ - if(nss_init_sslver(&sslver, data) != CURLE_OK) - goto error; - if(SSL_VersionRangeSet(model, &sslver) != SECSuccess) - goto error; - - ssl_cbc_random_iv = !data->set.ssl_enable_beast; -#ifdef SSL_CBC_RANDOM_IV - /* unless the user explicitly asks to allow the protocol vulnerability, we - use the work-around */ - if(SSL_OptionSet(model, SSL_CBC_RANDOM_IV, ssl_cbc_random_iv) != SECSuccess) - infof(data, "warning: failed to set SSL_CBC_RANDOM_IV = %d\n", - ssl_cbc_random_iv); -#else - if(ssl_cbc_random_iv) - infof(data, "warning: support for SSL_CBC_RANDOM_IV not compiled in\n"); -#endif - - if(data->set.ssl.cipher_list) { - if(set_ciphers(data, model, data->set.ssl.cipher_list) != SECSuccess) { - result = CURLE_SSL_CIPHER; - goto error; - } - } - - if(!data->set.ssl.verifypeer && data->set.ssl.verifyhost) - infof(data, "warning: ignoring value of ssl.verifyhost\n"); - - /* bypass the default SSL_AuthCertificate() hook in case we do not want to - * verify peer */ - if(SSL_AuthCertificateHook(model, nss_auth_cert_hook, conn) != SECSuccess) - goto error; - - data->set.ssl.certverifyresult=0; /* not checked yet */ - if(SSL_BadCertHook(model, BadCertHandler, conn) != SECSuccess) - goto error; - - if(SSL_HandshakeCallback(model, HandshakeCallback, conn) != SECSuccess) - goto error; - - if(data->set.ssl.verifypeer) { - const CURLcode rv = nss_load_ca_certificates(conn, sockindex); - if(rv) { - result = rv; - goto error; - } - } - - if(data->set.ssl.CRLfile) { - const CURLcode rv = nss_load_crl(data->set.ssl.CRLfile); - if(rv) { - result = rv; - goto error; - } - infof(data, " CRLfile: %s\n", data->set.ssl.CRLfile); - } - - if(data->set.str[STRING_CERT]) { - char *nickname = dup_nickname(data, STRING_CERT); - if(nickname) { - /* we are not going to use libnsspem.so to read the client cert */ - connssl->obj_clicert = NULL; - } - else { - CURLcode rv = cert_stuff(conn, sockindex, data->set.str[STRING_CERT], - data->set.str[STRING_KEY]); - if(rv) { - /* failf() is already done in cert_stuff() */ - result = rv; - goto error; - } - } - - /* store the nickname for SelectClientCert() called during handshake */ - connssl->client_nickname = nickname; - } - else - connssl->client_nickname = NULL; - - if(SSL_GetClientAuthDataHook(model, SelectClientCert, - (void *)connssl) != SECSuccess) { - result = CURLE_SSL_CERTPROBLEM; - goto error; - } - - /* wrap OS file descriptor by NSPR's file descriptor abstraction */ - nspr_io = PR_ImportTCPSocket(sockfd); - if(!nspr_io) - goto error; - - /* create our own NSPR I/O layer */ - nspr_io_stub = PR_CreateIOLayerStub(nspr_io_identity, &nspr_io_methods); - if(!nspr_io_stub) { - PR_Close(nspr_io); - goto error; - } - - /* make the per-connection data accessible from NSPR I/O callbacks */ - nspr_io_stub->secret = (void *)connssl; - - /* push our new layer to the NSPR I/O stack */ - if(PR_PushIOLayer(nspr_io, PR_TOP_IO_LAYER, nspr_io_stub) != PR_SUCCESS) { - PR_Close(nspr_io); - PR_Close(nspr_io_stub); - goto error; - } - - /* import our model socket onto the current I/O stack */ - connssl->handle = SSL_ImportFD(model, nspr_io); - if(!connssl->handle) { - PR_Close(nspr_io); - goto error; - } - - PR_Close(model); /* We don't need this any more */ - model = NULL; - - /* This is the password associated with the cert that we're using */ - if(data->set.str[STRING_KEY_PASSWD]) { - SSL_SetPKCS11PinArg(connssl->handle, data->set.str[STRING_KEY_PASSWD]); - } - -#ifdef SSL_ENABLE_OCSP_STAPLING - if(data->set.ssl.verifystatus) { - if(SSL_OptionSet(connssl->handle, SSL_ENABLE_OCSP_STAPLING, PR_TRUE) - != SECSuccess) - goto error; - } -#endif - -#ifdef SSL_ENABLE_NPN - if(SSL_OptionSet(connssl->handle, SSL_ENABLE_NPN, data->set.ssl_enable_npn - ? PR_TRUE : PR_FALSE) != SECSuccess) - goto error; -#endif - -#ifdef SSL_ENABLE_ALPN - if(SSL_OptionSet(connssl->handle, SSL_ENABLE_ALPN, data->set.ssl_enable_alpn - ? PR_TRUE : PR_FALSE) != SECSuccess) - goto error; -#endif - -#ifdef SSL_ENABLE_FALSE_START - if(data->set.ssl.falsestart) { - if(SSL_OptionSet(connssl->handle, SSL_ENABLE_FALSE_START, PR_TRUE) - != SECSuccess) - goto error; - - if(SSL_SetCanFalseStartCallback(connssl->handle, CanFalseStartCallback, - conn) != SECSuccess) - goto error; - } -#endif - -#if defined(SSL_ENABLE_NPN) || defined(SSL_ENABLE_ALPN) - if(data->set.ssl_enable_npn || data->set.ssl_enable_alpn) { - int cur = 0; - unsigned char protocols[128]; - -#ifdef USE_NGHTTP2 - if(data->set.httpversion == CURL_HTTP_VERSION_2_0) { - protocols[cur++] = NGHTTP2_PROTO_VERSION_ID_LEN; - memcpy(&protocols[cur], NGHTTP2_PROTO_VERSION_ID, - NGHTTP2_PROTO_VERSION_ID_LEN); - cur += NGHTTP2_PROTO_VERSION_ID_LEN; - } -#endif - protocols[cur++] = ALPN_HTTP_1_1_LENGTH; - memcpy(&protocols[cur], ALPN_HTTP_1_1, ALPN_HTTP_1_1_LENGTH); - cur += ALPN_HTTP_1_1_LENGTH; - - if(SSL_SetNextProtoNego(connssl->handle, protocols, cur) != SECSuccess) - goto error; - } -#endif - - - /* Force handshake on next I/O */ - SSL_ResetHandshake(connssl->handle, /* asServer */ PR_FALSE); - - SSL_SetURL(connssl->handle, conn->host.name); - - return CURLE_OK; - -error: - if(model) - PR_Close(model); - - return nss_fail_connect(connssl, data, result); -} - -static CURLcode nss_do_connect(struct connectdata *conn, int sockindex) -{ - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - struct SessionHandle *data = conn->data; - CURLcode result = CURLE_SSL_CONNECT_ERROR; - PRUint32 timeout; - - /* check timeout situation */ - const long time_left = Curl_timeleft(data, NULL, TRUE); - if(time_left < 0L) { - failf(data, "timed out before SSL handshake"); - result = CURLE_OPERATION_TIMEDOUT; - goto error; - } - - /* Force the handshake now */ - timeout = PR_MillisecondsToInterval((PRUint32) time_left); - if(SSL_ForceHandshakeWithTimeout(connssl->handle, timeout) != SECSuccess) { - if(PR_GetError() == PR_WOULD_BLOCK_ERROR) - /* blocking direction is updated by nss_update_connecting_state() */ - return CURLE_AGAIN; - else if(conn->data->set.ssl.certverifyresult == SSL_ERROR_BAD_CERT_DOMAIN) - result = CURLE_PEER_FAILED_VERIFICATION; - else if(conn->data->set.ssl.certverifyresult!=0) - result = CURLE_SSL_CACERT; - goto error; - } - - result = display_conn_info(conn, connssl->handle); - if(result) - goto error; - - if(data->set.str[STRING_SSL_ISSUERCERT]) { - SECStatus ret = SECFailure; - char *nickname = dup_nickname(data, STRING_SSL_ISSUERCERT); - if(nickname) { - /* we support only nicknames in case of STRING_SSL_ISSUERCERT for now */ - ret = check_issuer_cert(connssl->handle, nickname); - free(nickname); - } - - if(SECFailure == ret) { - infof(data, "SSL certificate issuer check failed\n"); - result = CURLE_SSL_ISSUER_ERROR; - goto error; - } - else { - infof(data, "SSL certificate issuer check ok\n"); - } - } - - return CURLE_OK; - -error: - return nss_fail_connect(connssl, data, result); -} - -static CURLcode nss_connect_common(struct connectdata *conn, int sockindex, - bool *done) -{ - struct ssl_connect_data *connssl = &conn->ssl[sockindex]; - struct SessionHandle *data = conn->data; - const bool blocking = (done == NULL); - CURLcode result; - - if(connssl->state == ssl_connection_complete) - return CURLE_OK; - - if(connssl->connecting_state == ssl_connect_1) { - result = nss_setup_connect(conn, sockindex); - if(result) - /* we do not expect CURLE_AGAIN from nss_setup_connect() */ - return result; - - if(!blocking) { - /* in non-blocking mode, set NSS non-blocking mode before handshake */ - result = nss_set_nonblock(connssl, data); - if(result) - return result; - } - - connssl->connecting_state = ssl_connect_2; - } - - result = nss_do_connect(conn, sockindex); - switch(result) { - case CURLE_OK: - break; - case CURLE_AGAIN: - if(!blocking) - /* CURLE_AGAIN in non-blocking mode is not an error */ - return CURLE_OK; - /* fall through */ - default: - return result; - } - - if(blocking) { - /* in blocking mode, set NSS non-blocking mode _after_ SSL handshake */ - result = nss_set_nonblock(connssl, data); - if(result) - return result; - } - else - /* signal completed SSL handshake */ - *done = TRUE; - - connssl->state = ssl_connection_complete; - conn->recv[sockindex] = nss_recv; - conn->send[sockindex] = nss_send; - - /* ssl_connect_done is never used outside, go back to the initial state */ - connssl->connecting_state = ssl_connect_1; - - return CURLE_OK; -} - -CURL_STATIC CURLcode Curl_nss_connect(struct connectdata *conn, int sockindex) -{ - return nss_connect_common(conn, sockindex, /* blocking */ NULL); -} - -CURL_STATIC CURLcode Curl_nss_connect_nonblocking(struct connectdata *conn, - int sockindex, bool *done) -{ - return nss_connect_common(conn, sockindex, done); -} - -static ssize_t nss_send(struct connectdata *conn, /* connection data */ - int sockindex, /* socketindex */ - const void *mem, /* send this data */ - size_t len, /* amount to write */ - CURLcode *curlcode) -{ - ssize_t rc = PR_Send(conn->ssl[sockindex].handle, mem, (int)len, 0, - PR_INTERVAL_NO_WAIT); - if(rc < 0) { - PRInt32 err = PR_GetError(); - if(err == PR_WOULD_BLOCK_ERROR) - *curlcode = CURLE_AGAIN; - else { - /* print the error number and error string */ - const char *err_name = nss_error_to_name(err); - infof(conn->data, "SSL write: error %d (%s)\n", err, err_name); - - /* print a human-readable message describing the error if available */ - nss_print_error_message(conn->data, err); - - *curlcode = (is_cc_error(err)) - ? CURLE_SSL_CERTPROBLEM - : CURLE_SEND_ERROR; - } - - return -1; - } - - return rc; /* number of bytes */ -} - -static ssize_t nss_recv(struct connectdata * conn, /* connection data */ - int num, /* socketindex */ - char *buf, /* store read data here */ - size_t buffersize, /* max amount to read */ - CURLcode *curlcode) -{ - ssize_t nread = PR_Recv(conn->ssl[num].handle, buf, (int)buffersize, 0, - PR_INTERVAL_NO_WAIT); - if(nread < 0) { - /* failed SSL read */ - PRInt32 err = PR_GetError(); - - if(err == PR_WOULD_BLOCK_ERROR) - *curlcode = CURLE_AGAIN; - else { - /* print the error number and error string */ - const char *err_name = nss_error_to_name(err); - infof(conn->data, "SSL read: errno %d (%s)\n", err, err_name); - - /* print a human-readable message describing the error if available */ - nss_print_error_message(conn->data, err); - - *curlcode = (is_cc_error(err)) - ? CURLE_SSL_CERTPROBLEM - : CURLE_RECV_ERROR; - } - - return -1; - } - - return nread; -} - -CURL_STATIC size_t Curl_nss_version(char *buffer, size_t size) -{ - return snprintf(buffer, size, "NSS/%s", NSS_VERSION); -} - -/* data might be NULL */ -CURL_STATIC int Curl_nss_seed(struct SessionHandle *data) -{ - /* make sure that NSS is initialized */ - return !!Curl_nss_force_init(data); -} - -/* data might be NULL */ -CURL_STATIC int Curl_nss_random(struct SessionHandle *data, - unsigned char *entropy, - size_t length) -{ - Curl_nss_seed(data); /* Initiate the seed if not already done */ - - if(SECSuccess != PK11_GenerateRandom(entropy, curlx_uztosi(length))) - /* signal a failure */ - return -1; - - return 0; -} - -CURL_STATIC void Curl_nss_md5sum(unsigned char *tmp, /* input */ - size_t tmplen, - unsigned char *md5sum, /* output */ - size_t md5len) -{ - PK11Context *MD5pw = PK11_CreateDigestContext(SEC_OID_MD5); - unsigned int MD5out; - - PK11_DigestOp(MD5pw, tmp, curlx_uztoui(tmplen)); - PK11_DigestFinal(MD5pw, md5sum, &MD5out, curlx_uztoui(md5len)); - PK11_DestroyContext(MD5pw, PR_TRUE); -} - -CURL_STATIC bool Curl_nss_cert_status_request(void) -{ -#ifdef SSL_ENABLE_OCSP_STAPLING - return TRUE; -#else - return FALSE; -#endif -} - -CURL_STATIC bool Curl_nss_false_start(void) { -#ifdef SSL_ENABLE_FALSE_START - return TRUE; -#else - return FALSE; -#endif -} - -#endif /* USE_NSS */ -- cgit v1.2.3