diff options
Diffstat (limited to 'libcurl/src/lib/curl_ntlm_core.c')
| -rw-r--r-- | libcurl/src/lib/curl_ntlm_core.c | 765 |
1 files changed, 765 insertions, 0 deletions
diff --git a/libcurl/src/lib/curl_ntlm_core.c b/libcurl/src/lib/curl_ntlm_core.c new file mode 100644 index 0000000..bef48cf --- /dev/null +++ b/libcurl/src/lib/curl_ntlm_core.c @@ -0,0 +1,765 @@ +/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, 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.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#if defined(USE_NTLM)
+
+/*
+ * NTLM details:
+ *
+ * http://davenport.sourceforge.net/ntlm.html
+ * http://www.innovation.ch/java/ntlm.html
+ */
+
+#if !defined(USE_WINDOWS_SSPI) || defined(USE_WIN32_CRYPTO)
+
+#ifdef USE_OPENSSL
+
+# ifdef USE_OPENSSL
+# include <openssl/des.h>
+# ifndef OPENSSL_NO_MD4
+# include <openssl/md4.h>
+# endif
+# include <openssl/md5.h>
+# include <openssl/ssl.h>
+# include <openssl/rand.h>
+# else
+# include <des.h>
+# ifndef OPENSSL_NO_MD4
+# include <md4.h>
+# endif
+# include <md5.h>
+# include <ssl.h>
+# include <rand.h>
+# endif
+# if (OPENSSL_VERSION_NUMBER < 0x00907001L)
+# define DES_key_schedule des_key_schedule
+# define DES_cblock des_cblock
+# define DES_set_odd_parity des_set_odd_parity
+# define DES_set_key des_set_key
+# define DES_ecb_encrypt des_ecb_encrypt
+# define DESKEY(x) x
+# define DESKEYARG(x) x
+# else
+# define DESKEYARG(x) *x
+# define DESKEY(x) &x
+# endif
+
+#elif defined(USE_GNUTLS_NETTLE)
+
+# include <nettle/des.h>
+# include <nettle/md4.h>
+
+#elif defined(USE_GNUTLS)
+
+# include <gcrypt.h>
+# define MD5_DIGEST_LENGTH 16
+# define MD4_DIGEST_LENGTH 16
+
+#elif defined(USE_NSS)
+
+# include <nss.h>
+# include <pk11pub.h>
+# include <hasht.h>
+# include "curl_md4.h"
+# define MD5_DIGEST_LENGTH MD5_LENGTH
+
+#elif defined(USE_DARWINSSL)
+
+# include <CommonCrypto/CommonCryptor.h>
+# include <CommonCrypto/CommonDigest.h>
+
+#elif defined(USE_OS400CRYPTO)
+# include "cipher.mih" /* mih/cipher */
+# include "curl_md4.h"
+#elif defined(USE_WIN32_CRYPTO)
+# include <wincrypt.h>
+#else
+# error "Can't compile NTLM support without a crypto library."
+#endif
+
+#include "urldata.h"
+#include "non-ascii.h"
+#include "rawstr.h"
+#include "curl_ntlm_core.h"
+#include "curl_md5.h"
+#include "curl_hmac.h"
+#include "warnless.h"
+#include "curl_endian.h"
+#include "curl_des.h"
+#include "curl_printf.h"
+
+/* The last #include files should be: */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+#define NTLM_HMAC_MD5_LEN (16)
+#define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00"
+#define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4)
+
+/*
+* Turns a 56-bit key into being 64-bit wide.
+*/
+static void extend_key_56_to_64(const unsigned char *key_56, char *key)
+{
+ key[0] = key_56[0];
+ key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
+ key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
+ key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
+ key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
+ key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
+ key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
+ key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
+}
+
+#ifdef USE_OPENSSL
+/*
+ * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The
+ * key schedule ks is also set.
+ */
+static void setup_des_key(const unsigned char *key_56,
+ DES_key_schedule DESKEYARG(ks))
+{
+ DES_cblock key;
+
+ /* Expand the 56-bit key to 64-bits */
+ extend_key_56_to_64(key_56, (char *) key);
+
+ /* Set the key parity to odd */
+#if defined(HAVE_BORINGSSL)
+ Curl_des_set_odd_parity((unsigned char *) &key, sizeof(key));
+#else
+ DES_set_odd_parity(&key);
+#endif
+
+ /* Set the key */
+ DES_set_key(&key, ks);
+}
+
+#elif defined(USE_GNUTLS_NETTLE)
+
+static void setup_des_key(const unsigned char *key_56,
+ struct des_ctx *des)
+{
+ char key[8];
+
+ /* Expand the 56-bit key to 64-bits */
+ extend_key_56_to_64(key_56, key);
+
+ /* Set the key parity to odd */
+ Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
+
+ /* Set the key */
+ des_set_key(des, (const uint8_t *) key);
+}
+
+#elif defined(USE_GNUTLS)
+
+/*
+ * Turns a 56 bit key into the 64 bit, odd parity key and sets the key.
+ */
+static void setup_des_key(const unsigned char *key_56,
+ gcry_cipher_hd_t *des)
+{
+ char key[8];
+
+ /* Expand the 56-bit key to 64-bits */
+ extend_key_56_to_64(key_56, key);
+
+ /* Set the key parity to odd */
+ Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
+
+ /* Set the key */
+ gcry_cipher_setkey(*des, key, sizeof(key));
+}
+
+#elif defined(USE_NSS)
+
+/*
+ * Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using
+ * the expanded key. The caller is responsible for giving 64 bit of valid
+ * data is IN and (at least) 64 bit large buffer as OUT.
+ */
+static bool encrypt_des(const unsigned char *in, unsigned char *out,
+ const unsigned char *key_56)
+{
+ const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */
+ PK11SlotInfo *slot = NULL;
+ char key[8]; /* expanded 64 bit key */
+ SECItem key_item;
+ PK11SymKey *symkey = NULL;
+ SECItem *param = NULL;
+ PK11Context *ctx = NULL;
+ int out_len; /* not used, required by NSS */
+ bool rv = FALSE;
+
+ /* use internal slot for DES encryption (requires NSS to be initialized) */
+ slot = PK11_GetInternalKeySlot();
+ if(!slot)
+ return FALSE;
+
+ /* Expand the 56-bit key to 64-bits */
+ extend_key_56_to_64(key_56, key);
+
+ /* Set the key parity to odd */
+ Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
+
+ /* Import the key */
+ key_item.data = (unsigned char *)key;
+ key_item.len = sizeof(key);
+ symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT,
+ &key_item, NULL);
+ if(!symkey)
+ goto fail;
+
+ /* Create the DES encryption context */
+ param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL);
+ if(!param)
+ goto fail;
+ ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param);
+ if(!ctx)
+ goto fail;
+
+ /* Perform the encryption */
+ if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8,
+ (unsigned char *)in, /* inbuflen */ 8)
+ && SECSuccess == PK11_Finalize(ctx))
+ rv = /* all OK */ TRUE;
+
+fail:
+ /* cleanup */
+ if(ctx)
+ PK11_DestroyContext(ctx, PR_TRUE);
+ if(symkey)
+ PK11_FreeSymKey(symkey);
+ if(param)
+ SECITEM_FreeItem(param, PR_TRUE);
+ PK11_FreeSlot(slot);
+ return rv;
+}
+
+#elif defined(USE_DARWINSSL)
+
+static bool encrypt_des(const unsigned char *in, unsigned char *out,
+ const unsigned char *key_56)
+{
+ char key[8];
+ size_t out_len;
+ CCCryptorStatus err;
+
+ /* Expand the 56-bit key to 64-bits */
+ extend_key_56_to_64(key_56, key);
+
+ /* Set the key parity to odd */
+ Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
+
+ /* Perform the encryption */
+ err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
+ kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
+ 8 /* outbuflen */, &out_len);
+
+ return err == kCCSuccess;
+}
+
+#elif defined(USE_OS400CRYPTO)
+
+static bool encrypt_des(const unsigned char *in, unsigned char *out,
+ const unsigned char *key_56)
+{
+ char key[8];
+ _CIPHER_Control_T ctl;
+
+ /* Setup the cipher control structure */
+ ctl.Func_ID = ENCRYPT_ONLY;
+ ctl.Data_Len = sizeof(key);
+
+ /* Expand the 56-bit key to 64-bits */
+ extend_key_56_to_64(key_56, ctl.Crypto_Key);
+
+ /* Set the key parity to odd */
+ Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
+
+ /* Perform the encryption */
+ _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
+
+ return TRUE;
+}
+
+#elif defined(USE_WIN32_CRYPTO)
+
+static bool encrypt_des(const unsigned char *in, unsigned char *out,
+ const unsigned char *key_56)
+{
+ HCRYPTPROV hprov;
+ HCRYPTKEY hkey;
+ struct {
+ BLOBHEADER hdr;
+ unsigned int len;
+ char key[8];
+ } blob;
+ DWORD len = 8;
+
+ /* Acquire the crypto provider */
+ if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
+ CRYPT_VERIFYCONTEXT))
+ return FALSE;
+
+ /* Setup the key blob structure */
+ memset(&blob, 0, sizeof(blob));
+ blob.hdr.bType = PLAINTEXTKEYBLOB;
+ blob.hdr.bVersion = 2;
+ blob.hdr.aiKeyAlg = CALG_DES;
+ blob.len = sizeof(blob.key);
+
+ /* Expand the 56-bit key to 64-bits */
+ extend_key_56_to_64(key_56, blob.key);
+
+ /* Set the key parity to odd */
+ Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
+
+ /* Import the key */
+ if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
+ CryptReleaseContext(hprov, 0);
+
+ return FALSE;
+ }
+
+ memcpy(out, in, 8);
+
+ /* Perform the encryption */
+ CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
+
+ CryptDestroyKey(hkey);
+ CryptReleaseContext(hprov, 0);
+
+ return TRUE;
+}
+
+#endif /* defined(USE_WIN32_CRYPTO) */
+
+ /*
+ * takes a 21 byte array and treats it as 3 56-bit DES keys. The
+ * 8 byte plaintext is encrypted with each key and the resulting 24
+ * bytes are stored in the results array.
+ */
+CURL_STATIC void Curl_ntlm_core_lm_resp(const unsigned char *keys,
+ const unsigned char *plaintext,
+ unsigned char *results)
+{
+#ifdef USE_OPENSSL
+ DES_key_schedule ks;
+
+ setup_des_key(keys, DESKEY(ks));
+ DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
+ DESKEY(ks), DES_ENCRYPT);
+
+ setup_des_key(keys + 7, DESKEY(ks));
+ DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
+ DESKEY(ks), DES_ENCRYPT);
+
+ setup_des_key(keys + 14, DESKEY(ks));
+ DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
+ DESKEY(ks), DES_ENCRYPT);
+#elif defined(USE_GNUTLS_NETTLE)
+ struct des_ctx des;
+ setup_des_key(keys, &des);
+ des_encrypt(&des, 8, results, plaintext);
+ setup_des_key(keys + 7, &des);
+ des_encrypt(&des, 8, results + 8, plaintext);
+ setup_des_key(keys + 14, &des);
+ des_encrypt(&des, 8, results + 16, plaintext);
+#elif defined(USE_GNUTLS)
+ gcry_cipher_hd_t des;
+
+ gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
+ setup_des_key(keys, &des);
+ gcry_cipher_encrypt(des, results, 8, plaintext, 8);
+ gcry_cipher_close(des);
+
+ gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
+ setup_des_key(keys + 7, &des);
+ gcry_cipher_encrypt(des, results + 8, 8, plaintext, 8);
+ gcry_cipher_close(des);
+
+ gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
+ setup_des_key(keys + 14, &des);
+ gcry_cipher_encrypt(des, results + 16, 8, plaintext, 8);
+ gcry_cipher_close(des);
+#elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \
+ || defined(USE_WIN32_CRYPTO)
+ encrypt_des(plaintext, results, keys);
+ encrypt_des(plaintext, results + 8, keys + 7);
+ encrypt_des(plaintext, results + 16, keys + 14);
+#endif
+}
+
+/*
+ * Set up lanmanager hashed password
+ */
+CURL_STATIC CURLcode Curl_ntlm_core_mk_lm_hash(struct SessionHandle *data,
+ const char *password,
+ unsigned char *lmbuffer /* 21 bytes */)
+{
+ CURLcode result;
+ unsigned char pw[14];
+ static const unsigned char magic[] = {
+ 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
+ };
+ size_t len = CURLMIN(strlen(password), 14);
+
+ Curl_strntoupper((char *)pw, password, len);
+ memset(&pw[len], 0, 14 - len);
+
+ /*
+ * The LanManager hashed password needs to be created using the
+ * password in the network encoding not the host encoding.
+ */
+ result = Curl_convert_to_network(data, (char *)pw, 14);
+ if(result)
+ return result;
+
+ {
+ /* Create LanManager hashed password. */
+
+#ifdef USE_OPENSSL
+ DES_key_schedule ks;
+
+ setup_des_key(pw, DESKEY(ks));
+ DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
+ DESKEY(ks), DES_ENCRYPT);
+
+ setup_des_key(pw + 7, DESKEY(ks));
+ DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
+ DESKEY(ks), DES_ENCRYPT);
+#elif defined(USE_GNUTLS_NETTLE)
+ struct des_ctx des;
+ setup_des_key(pw, &des);
+ des_encrypt(&des, 8, lmbuffer, magic);
+ setup_des_key(pw + 7, &des);
+ des_encrypt(&des, 8, lmbuffer + 8, magic);
+#elif defined(USE_GNUTLS)
+ gcry_cipher_hd_t des;
+
+ gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
+ setup_des_key(pw, &des);
+ gcry_cipher_encrypt(des, lmbuffer, 8, magic, 8);
+ gcry_cipher_close(des);
+
+ gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
+ setup_des_key(pw + 7, &des);
+ gcry_cipher_encrypt(des, lmbuffer + 8, 8, magic, 8);
+ gcry_cipher_close(des);
+#elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \
+ || defined(USE_WIN32_CRYPTO)
+ encrypt_des(magic, lmbuffer, pw);
+ encrypt_des(magic, lmbuffer + 8, pw + 7);
+#endif
+
+ memset(lmbuffer + 16, 0, 21 - 16);
+ }
+
+ return CURLE_OK;
+}
+
+#if USE_NTRESPONSES
+static void ascii_to_unicode_le(unsigned char *dest, const char *src,
+ size_t srclen)
+{
+ size_t i;
+ for(i = 0; i < srclen; i++) {
+ dest[2 * i] = (unsigned char)src[i];
+ dest[2 * i + 1] = '\0';
+ }
+}
+
+#if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI)
+
+static void ascii_uppercase_to_unicode_le(unsigned char *dest,
+ const char *src, size_t srclen)
+{
+ size_t i;
+ for(i = 0; i < srclen; i++) {
+ dest[2 * i] = (unsigned char)(toupper(src[i]));
+ dest[2 * i + 1] = '\0';
+ }
+}
+
+#endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
+
+/*
+ * Set up nt hashed passwords
+ * @unittest: 1600
+ */
+CURL_STATIC CURLcode Curl_ntlm_core_mk_nt_hash(struct SessionHandle *data,
+ const char *password,
+ unsigned char *ntbuffer /* 21 bytes */)
+{
+ size_t len = strlen(password);
+ unsigned char *pw = malloc(len * 2);
+ CURLcode result;
+ if(!pw)
+ return CURLE_OUT_OF_MEMORY;
+
+ ascii_to_unicode_le(pw, password, len);
+
+ /*
+ * The NT hashed password needs to be created using the password in the
+ * network encoding not the host encoding.
+ */
+ result = Curl_convert_to_network(data, (char *)pw, len * 2);
+ if(result)
+ return result;
+
+ {
+ /* Create NT hashed password. */
+#ifdef USE_OPENSSL
+ MD4_CTX MD4pw;
+ MD4_Init(&MD4pw);
+ MD4_Update(&MD4pw, pw, 2 * len);
+ MD4_Final(ntbuffer, &MD4pw);
+#elif defined(USE_GNUTLS_NETTLE)
+ struct md4_ctx MD4pw;
+ md4_init(&MD4pw);
+ md4_update(&MD4pw, (unsigned int)(2 * len), pw);
+ md4_digest(&MD4pw, MD4_DIGEST_SIZE, ntbuffer);
+#elif defined(USE_GNUTLS)
+ gcry_md_hd_t MD4pw;
+ gcry_md_open(&MD4pw, GCRY_MD_MD4, 0);
+ gcry_md_write(MD4pw, pw, 2 * len);
+ memcpy (ntbuffer, gcry_md_read (MD4pw, 0), MD4_DIGEST_LENGTH);
+ gcry_md_close(MD4pw);
+#elif defined(USE_NSS) || defined(USE_OS400CRYPTO)
+ Curl_md4it(ntbuffer, pw, 2 * len);
+#elif defined(USE_DARWINSSL)
+ (void)CC_MD4(pw, (CC_LONG)(2 * len), ntbuffer);
+#elif defined(USE_WIN32_CRYPTO)
+ HCRYPTPROV hprov;
+ if(CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
+ CRYPT_VERIFYCONTEXT)) {
+ HCRYPTHASH hhash;
+ if(CryptCreateHash(hprov, CALG_MD4, 0, 0, &hhash)) {
+ DWORD length = 16;
+ CryptHashData(hhash, pw, (unsigned int)len * 2, 0);
+ CryptGetHashParam(hhash, HP_HASHVAL, ntbuffer, &length, 0);
+ CryptDestroyHash(hhash);
+ }
+ CryptReleaseContext(hprov, 0);
+ }
+#endif
+
+ memset(ntbuffer + 16, 0, 21 - 16);
+ }
+
+ free(pw);
+
+ return CURLE_OK;
+}
+
+#if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI)
+
+/* This returns the HMAC MD5 digest */
+CURL_STATIC CURLcode Curl_hmac_md5(const unsigned char *key, unsigned int keylen,
+ const unsigned char *data, unsigned int datalen,
+ unsigned char *output)
+{
+ HMAC_context *ctxt = Curl_HMAC_init(Curl_HMAC_MD5, key, keylen);
+
+ if(!ctxt)
+ return CURLE_OUT_OF_MEMORY;
+
+ /* Update the digest with the given challenge */
+ Curl_HMAC_update(ctxt, data, datalen);
+
+ /* Finalise the digest */
+ Curl_HMAC_final(ctxt, output);
+
+ return CURLE_OK;
+}
+
+/* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
+ * (uppercase UserName + Domain) as the data
+ */
+CURL_STATIC CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
+ const char *domain, size_t domlen,
+ unsigned char *ntlmhash,
+ unsigned char *ntlmv2hash)
+{
+ /* Unicode representation */
+ size_t identity_len = (userlen + domlen) * 2;
+ unsigned char *identity = malloc(identity_len);
+ CURLcode result = CURLE_OK;
+
+ if(!identity)
+ return CURLE_OUT_OF_MEMORY;
+
+ ascii_uppercase_to_unicode_le(identity, user, userlen);
+ ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
+
+ result = Curl_hmac_md5(ntlmhash, 16, identity, curlx_uztoui(identity_len),
+ ntlmv2hash);
+
+ free(identity);
+
+ return result;
+}
+
+/*
+ * Curl_ntlm_core_mk_ntlmv2_resp()
+ *
+ * This creates the NTLMv2 response as set in the ntlm type-3 message.
+ *
+ * Parameters:
+ *
+ * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
+ * challenge_client [in] - The client nonce (8 bytes)
+ * ntlm [in] - The ntlm data struct being used to read TargetInfo
+ and Server challenge received in the type-2 message
+ * ntresp [out] - The address where a pointer to newly allocated
+ * memory holding the NTLMv2 response.
+ * ntresp_len [out] - The length of the output message.
+ *
+ * Returns CURLE_OK on success.
+ */
+CURL_STATIC CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
+ unsigned char *challenge_client,
+ struct ntlmdata *ntlm,
+ unsigned char **ntresp,
+ unsigned int *ntresp_len)
+{
+/* NTLMv2 response structure :
+------------------------------------------------------------------------------
+0 HMAC MD5 16 bytes
+------BLOB--------------------------------------------------------------------
+16 Signature 0x01010000
+20 Reserved long (0x00000000)
+24 Timestamp LE, 64-bit signed value representing the number of
+ tenths of a microsecond since January 1, 1601.
+32 Client Nonce 8 bytes
+40 Unknown 4 bytes
+44 Target Info N bytes (from the type-2 message)
+44+N Unknown 4 bytes
+------------------------------------------------------------------------------
+*/
+
+ unsigned int len = 0;
+ unsigned char *ptr = NULL;
+ unsigned char hmac_output[NTLM_HMAC_MD5_LEN];
+#if defined(HAVE_LONGLONG)
+ long long tw;
+#else
+ __int64 tw;
+#endif
+ CURLcode result = CURLE_OK;
+
+ /* Calculate the timestamp */
+#ifdef DEBUGBUILD
+ char *force_timestamp = getenv("CURL_FORCETIME");
+ if(force_timestamp)
+ tw = 11644473600ULL * 10000000ULL;
+ else
+#endif
+ tw = ((long long)time(NULL) + 11644473600ULL) * 10000000ULL;
+
+ /* Calculate the response len */
+ len = NTLM_HMAC_MD5_LEN + NTLMv2_BLOB_LEN;
+
+ /* Allocate the response */
+ ptr = malloc(len);
+ if(!ptr)
+ return CURLE_OUT_OF_MEMORY;
+
+ memset(ptr, 0, len);
+
+ /* Create the BLOB structure */
+ snprintf((char *)ptr + NTLM_HMAC_MD5_LEN, NTLMv2_BLOB_LEN,
+ NTLMv2_BLOB_SIGNATURE
+ "%c%c%c%c", /* Reserved = 0 */
+ 0, 0, 0, 0);
+
+ Curl_write64_le(tw, ptr + 24);
+ memcpy(ptr + 32, challenge_client, 8);
+ memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
+
+ /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
+ memcpy(ptr + 8, &ntlm->nonce[0], 8);
+ result = Curl_hmac_md5(ntlmv2hash, NTLM_HMAC_MD5_LEN, ptr + 8,
+ NTLMv2_BLOB_LEN + 8, hmac_output);
+ if(result) {
+ free(ptr);
+ return result;
+ }
+
+ /* Concatenate the HMAC MD5 output with the BLOB */
+ memcpy(ptr, hmac_output, NTLM_HMAC_MD5_LEN);
+
+ /* Return the response */
+ *ntresp = ptr;
+ *ntresp_len = len;
+
+ return result;
+}
+
+/*
+ * Curl_ntlm_core_mk_lmv2_resp()
+ *
+ * This creates the LMv2 response as used in the ntlm type-3 message.
+ *
+ * Parameters:
+ *
+ * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
+ * challenge_client [in] - The client nonce (8 bytes)
+ * challenge_client [in] - The server challenge (8 bytes)
+ * lmresp [out] - The LMv2 response (24 bytes)
+ *
+ * Returns CURLE_OK on success.
+ */
+CURL_STATIC CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
+ unsigned char *challenge_client,
+ unsigned char *challenge_server,
+ unsigned char *lmresp)
+{
+ unsigned char data[16];
+ unsigned char hmac_output[16];
+ CURLcode result = CURLE_OK;
+
+ memcpy(&data[0], challenge_server, 8);
+ memcpy(&data[8], challenge_client, 8);
+
+ result = Curl_hmac_md5(ntlmv2hash, 16, &data[0], 16, hmac_output);
+ if(result)
+ return result;
+
+ /* Concatenate the HMAC MD5 output with the client nonce */
+ memcpy(lmresp, hmac_output, 16);
+ memcpy(lmresp+16, challenge_client, 8);
+
+ return result;
+}
+
+#endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
+
+#endif /* USE_NTRESPONSES */
+
+#endif /* !USE_WINDOWS_SSPI || USE_WIN32_CRYPTO */
+
+#endif /* USE_NTLM */
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