1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel (at) haxx.se>, et al. 9 * 10 * This software is licensed as described in the file COPYING, which 11 * you should have received as part of this distribution. The terms 12 * are also available at https://curl.haxx.se/docs/copyright.html. 13 * 14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell 15 * copies of the Software, and permit persons to whom the Software is 16 * furnished to do so, under the terms of the COPYING file. 17 * 18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY 19 * KIND, either express or implied. 20 * 21 ***************************************************************************/ 22 23 #include "curl_setup.h" 24 25 #if defined(USE_NTLM) 26 27 /* 28 * NTLM details: 29 * 30 * http://davenport.sourceforge.net/ntlm.html 31 * https://www.innovation.ch/java/ntlm.html 32 */ 33 34 #if !defined(USE_WINDOWS_SSPI) || defined(USE_WIN32_CRYPTO) 35 36 #ifdef USE_OPENSSL 37 38 # ifdef USE_OPENSSL 39 # include <openssl/des.h> 40 # ifndef OPENSSL_NO_MD4 41 # include <openssl/md4.h> 42 # endif 43 # include <openssl/md5.h> 44 # include <openssl/ssl.h> 45 # include <openssl/rand.h> 46 # else 47 # include <des.h> 48 # ifndef OPENSSL_NO_MD4 49 # include <md4.h> 50 # endif 51 # include <md5.h> 52 # include <ssl.h> 53 # include <rand.h> 54 # endif 55 # if (OPENSSL_VERSION_NUMBER < 0x00907001L) 56 # define DES_key_schedule des_key_schedule 57 # define DES_cblock des_cblock 58 # define DES_set_odd_parity des_set_odd_parity 59 # define DES_set_key des_set_key 60 # define DES_ecb_encrypt des_ecb_encrypt 61 # define DESKEY(x) x 62 # define DESKEYARG(x) x 63 # else 64 # define DESKEYARG(x) *x 65 # define DESKEY(x) &x 66 # endif 67 68 #elif defined(USE_GNUTLS_NETTLE) 69 70 # include <nettle/des.h> 71 # include <nettle/md4.h> 72 73 #elif defined(USE_GNUTLS) 74 75 # include <gcrypt.h> 76 # define MD5_DIGEST_LENGTH 16 77 # define MD4_DIGEST_LENGTH 16 78 79 #elif defined(USE_NSS) 80 81 # include <nss.h> 82 # include <pk11pub.h> 83 # include <hasht.h> 84 # include "curl_md4.h" 85 # define MD5_DIGEST_LENGTH MD5_LENGTH 86 87 #elif defined(USE_DARWINSSL) 88 89 # include <CommonCrypto/CommonCryptor.h> 90 # include <CommonCrypto/CommonDigest.h> 91 92 #elif defined(USE_OS400CRYPTO) 93 # include "cipher.mih" /* mih/cipher */ 94 # include "curl_md4.h" 95 #elif defined(USE_WIN32_CRYPTO) 96 # include <wincrypt.h> 97 #else 98 # error "Can't compile NTLM support without a crypto library." 99 #endif 100 101 #include "urldata.h" 102 #include "non-ascii.h" 103 #include "rawstr.h" 104 #include "curl_ntlm_core.h" 105 #include "curl_md5.h" 106 #include "curl_hmac.h" 107 #include "warnless.h" 108 #include "curl_endian.h" 109 #include "curl_des.h" 110 /* The last 3 #include files should be in this order */ 111 #include "curl_printf.h" 112 #include "curl_memory.h" 113 #include "memdebug.h" 114 115 #define NTLM_HMAC_MD5_LEN (16) 116 #define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00" 117 #define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4) 118 119 /* 120 * Turns a 56-bit key into being 64-bit wide. 121 */ 122 static void extend_key_56_to_64(const unsigned char *key_56, char *key) 123 { 124 key[0] = key_56[0]; 125 key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1)); 126 key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2)); 127 key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3)); 128 key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4)); 129 key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5)); 130 key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6)); 131 key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF); 132 } 133 134 #ifdef USE_OPENSSL 135 /* 136 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The 137 * key schedule ks is also set. 138 */ 139 static void setup_des_key(const unsigned char *key_56, 140 DES_key_schedule DESKEYARG(ks)) 141 { 142 DES_cblock key; 143 144 /* Expand the 56-bit key to 64-bits */ 145 extend_key_56_to_64(key_56, (char *) &key); 146 147 /* Set the key parity to odd */ 148 DES_set_odd_parity(&key); 149 150 /* Set the key */ 151 DES_set_key(&key, ks); 152 } 153 154 #elif defined(USE_GNUTLS_NETTLE) 155 156 static void setup_des_key(const unsigned char *key_56, 157 struct des_ctx *des) 158 { 159 char key[8]; 160 161 /* Expand the 56-bit key to 64-bits */ 162 extend_key_56_to_64(key_56, key); 163 164 /* Set the key parity to odd */ 165 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key)); 166 167 /* Set the key */ 168 des_set_key(des, (const uint8_t *) key); 169 } 170 171 #elif defined(USE_GNUTLS) 172 173 /* 174 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. 175 */ 176 static void setup_des_key(const unsigned char *key_56, 177 gcry_cipher_hd_t *des) 178 { 179 char key[8]; 180 181 /* Expand the 56-bit key to 64-bits */ 182 extend_key_56_to_64(key_56, key); 183 184 /* Set the key parity to odd */ 185 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key)); 186 187 /* Set the key */ 188 gcry_cipher_setkey(*des, key, sizeof(key)); 189 } 190 191 #elif defined(USE_NSS) 192 193 /* 194 * Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using 195 * the expanded key. The caller is responsible for giving 64 bit of valid 196 * data is IN and (at least) 64 bit large buffer as OUT. 197 */ 198 static bool encrypt_des(const unsigned char *in, unsigned char *out, 199 const unsigned char *key_56) 200 { 201 const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */ 202 PK11SlotInfo *slot = NULL; 203 char key[8]; /* expanded 64 bit key */ 204 SECItem key_item; 205 PK11SymKey *symkey = NULL; 206 SECItem *param = NULL; 207 PK11Context *ctx = NULL; 208 int out_len; /* not used, required by NSS */ 209 bool rv = FALSE; 210 211 /* use internal slot for DES encryption (requires NSS to be initialized) */ 212 slot = PK11_GetInternalKeySlot(); 213 if(!slot) 214 return FALSE; 215 216 /* Expand the 56-bit key to 64-bits */ 217 extend_key_56_to_64(key_56, key); 218 219 /* Set the key parity to odd */ 220 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key)); 221 222 /* Import the key */ 223 key_item.data = (unsigned char *)key; 224 key_item.len = sizeof(key); 225 symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT, 226 &key_item, NULL); 227 if(!symkey) 228 goto fail; 229 230 /* Create the DES encryption context */ 231 param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL); 232 if(!param) 233 goto fail; 234 ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param); 235 if(!ctx) 236 goto fail; 237 238 /* Perform the encryption */ 239 if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8, 240 (unsigned char *)in, /* inbuflen */ 8) 241 && SECSuccess == PK11_Finalize(ctx)) 242 rv = /* all OK */ TRUE; 243 244 fail: 245 /* cleanup */ 246 if(ctx) 247 PK11_DestroyContext(ctx, PR_TRUE); 248 if(symkey) 249 PK11_FreeSymKey(symkey); 250 if(param) 251 SECITEM_FreeItem(param, PR_TRUE); 252 PK11_FreeSlot(slot); 253 return rv; 254 } 255 256 #elif defined(USE_DARWINSSL) 257 258 static bool encrypt_des(const unsigned char *in, unsigned char *out, 259 const unsigned char *key_56) 260 { 261 char key[8]; 262 size_t out_len; 263 CCCryptorStatus err; 264 265 /* Expand the 56-bit key to 64-bits */ 266 extend_key_56_to_64(key_56, key); 267 268 /* Set the key parity to odd */ 269 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key)); 270 271 /* Perform the encryption */ 272 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key, 273 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out, 274 8 /* outbuflen */, &out_len); 275 276 return err == kCCSuccess; 277 } 278 279 #elif defined(USE_OS400CRYPTO) 280 281 static bool encrypt_des(const unsigned char *in, unsigned char *out, 282 const unsigned char *key_56) 283 { 284 char key[8]; 285 _CIPHER_Control_T ctl; 286 287 /* Setup the cipher control structure */ 288 ctl.Func_ID = ENCRYPT_ONLY; 289 ctl.Data_Len = sizeof(key); 290 291 /* Expand the 56-bit key to 64-bits */ 292 extend_key_56_to_64(key_56, ctl.Crypto_Key); 293 294 /* Set the key parity to odd */ 295 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len); 296 297 /* Perform the encryption */ 298 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in); 299 300 return TRUE; 301 } 302 303 #elif defined(USE_WIN32_CRYPTO) 304 305 static bool encrypt_des(const unsigned char *in, unsigned char *out, 306 const unsigned char *key_56) 307 { 308 HCRYPTPROV hprov; 309 HCRYPTKEY hkey; 310 struct { 311 BLOBHEADER hdr; 312 unsigned int len; 313 char key[8]; 314 } blob; 315 DWORD len = 8; 316 317 /* Acquire the crypto provider */ 318 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL, 319 CRYPT_VERIFYCONTEXT)) 320 return FALSE; 321 322 /* Setup the key blob structure */ 323 memset(&blob, 0, sizeof(blob)); 324 blob.hdr.bType = PLAINTEXTKEYBLOB; 325 blob.hdr.bVersion = 2; 326 blob.hdr.aiKeyAlg = CALG_DES; 327 blob.len = sizeof(blob.key); 328 329 /* Expand the 56-bit key to 64-bits */ 330 extend_key_56_to_64(key_56, blob.key); 331 332 /* Set the key parity to odd */ 333 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key)); 334 335 /* Import the key */ 336 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) { 337 CryptReleaseContext(hprov, 0); 338 339 return FALSE; 340 } 341 342 memcpy(out, in, 8); 343 344 /* Perform the encryption */ 345 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len); 346 347 CryptDestroyKey(hkey); 348 CryptReleaseContext(hprov, 0); 349 350 return TRUE; 351 } 352 353 #endif /* defined(USE_WIN32_CRYPTO) */ 354 355 /* 356 * takes a 21 byte array and treats it as 3 56-bit DES keys. The 357 * 8 byte plaintext is encrypted with each key and the resulting 24 358 * bytes are stored in the results array. 359 */ 360 void Curl_ntlm_core_lm_resp(const unsigned char *keys, 361 const unsigned char *plaintext, 362 unsigned char *results) 363 { 364 #ifdef USE_OPENSSL 365 DES_key_schedule ks; 366 367 setup_des_key(keys, DESKEY(ks)); 368 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results, 369 DESKEY(ks), DES_ENCRYPT); 370 371 setup_des_key(keys + 7, DESKEY(ks)); 372 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8), 373 DESKEY(ks), DES_ENCRYPT); 374 375 setup_des_key(keys + 14, DESKEY(ks)); 376 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16), 377 DESKEY(ks), DES_ENCRYPT); 378 #elif defined(USE_GNUTLS_NETTLE) 379 struct des_ctx des; 380 setup_des_key(keys, &des); 381 des_encrypt(&des, 8, results, plaintext); 382 setup_des_key(keys + 7, &des); 383 des_encrypt(&des, 8, results + 8, plaintext); 384 setup_des_key(keys + 14, &des); 385 des_encrypt(&des, 8, results + 16, plaintext); 386 #elif defined(USE_GNUTLS) 387 gcry_cipher_hd_t des; 388 389 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0); 390 setup_des_key(keys, &des); 391 gcry_cipher_encrypt(des, results, 8, plaintext, 8); 392 gcry_cipher_close(des); 393 394 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0); 395 setup_des_key(keys + 7, &des); 396 gcry_cipher_encrypt(des, results + 8, 8, plaintext, 8); 397 gcry_cipher_close(des); 398 399 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0); 400 setup_des_key(keys + 14, &des); 401 gcry_cipher_encrypt(des, results + 16, 8, plaintext, 8); 402 gcry_cipher_close(des); 403 #elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \ 404 || defined(USE_WIN32_CRYPTO) 405 encrypt_des(plaintext, results, keys); 406 encrypt_des(plaintext, results + 8, keys + 7); 407 encrypt_des(plaintext, results + 16, keys + 14); 408 #endif 409 } 410 411 /* 412 * Set up lanmanager hashed password 413 */ 414 CURLcode Curl_ntlm_core_mk_lm_hash(struct Curl_easy *data, 415 const char *password, 416 unsigned char *lmbuffer /* 21 bytes */) 417 { 418 CURLcode result; 419 unsigned char pw[14]; 420 static const unsigned char magic[] = { 421 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */ 422 }; 423 size_t len = CURLMIN(strlen(password), 14); 424 425 Curl_strntoupper((char *)pw, password, len); 426 memset(&pw[len], 0, 14 - len); 427 428 /* 429 * The LanManager hashed password needs to be created using the 430 * password in the network encoding not the host encoding. 431 */ 432 result = Curl_convert_to_network(data, (char *)pw, 14); 433 if(result) 434 return result; 435 436 { 437 /* Create LanManager hashed password. */ 438 439 #ifdef USE_OPENSSL 440 DES_key_schedule ks; 441 442 setup_des_key(pw, DESKEY(ks)); 443 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer, 444 DESKEY(ks), DES_ENCRYPT); 445 446 setup_des_key(pw + 7, DESKEY(ks)); 447 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8), 448 DESKEY(ks), DES_ENCRYPT); 449 #elif defined(USE_GNUTLS_NETTLE) 450 struct des_ctx des; 451 setup_des_key(pw, &des); 452 des_encrypt(&des, 8, lmbuffer, magic); 453 setup_des_key(pw + 7, &des); 454 des_encrypt(&des, 8, lmbuffer + 8, magic); 455 #elif defined(USE_GNUTLS) 456 gcry_cipher_hd_t des; 457 458 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0); 459 setup_des_key(pw, &des); 460 gcry_cipher_encrypt(des, lmbuffer, 8, magic, 8); 461 gcry_cipher_close(des); 462 463 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0); 464 setup_des_key(pw + 7, &des); 465 gcry_cipher_encrypt(des, lmbuffer + 8, 8, magic, 8); 466 gcry_cipher_close(des); 467 #elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \ 468 || defined(USE_WIN32_CRYPTO) 469 encrypt_des(magic, lmbuffer, pw); 470 encrypt_des(magic, lmbuffer + 8, pw + 7); 471 #endif 472 473 memset(lmbuffer + 16, 0, 21 - 16); 474 } 475 476 return CURLE_OK; 477 } 478 479 #if USE_NTRESPONSES 480 static void ascii_to_unicode_le(unsigned char *dest, const char *src, 481 size_t srclen) 482 { 483 size_t i; 484 for(i = 0; i < srclen; i++) { 485 dest[2 * i] = (unsigned char)src[i]; 486 dest[2 * i + 1] = '\0'; 487 } 488 } 489 490 #if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI) 491 492 static void ascii_uppercase_to_unicode_le(unsigned char *dest, 493 const char *src, size_t srclen) 494 { 495 size_t i; 496 for(i = 0; i < srclen; i++) { 497 dest[2 * i] = (unsigned char)(toupper(src[i])); 498 dest[2 * i + 1] = '\0'; 499 } 500 } 501 502 #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */ 503 504 /* 505 * Set up nt hashed passwords 506 * @unittest: 1600 507 */ 508 CURLcode Curl_ntlm_core_mk_nt_hash(struct Curl_easy *data, 509 const char *password, 510 unsigned char *ntbuffer /* 21 bytes */) 511 { 512 size_t len = strlen(password); 513 unsigned char *pw = malloc(len * 2); 514 CURLcode result; 515 if(!pw) 516 return CURLE_OUT_OF_MEMORY; 517 518 ascii_to_unicode_le(pw, password, len); 519 520 /* 521 * The NT hashed password needs to be created using the password in the 522 * network encoding not the host encoding. 523 */ 524 result = Curl_convert_to_network(data, (char *)pw, len * 2); 525 if(result) 526 return result; 527 528 { 529 /* Create NT hashed password. */ 530 #ifdef USE_OPENSSL 531 MD4_CTX MD4pw; 532 MD4_Init(&MD4pw); 533 MD4_Update(&MD4pw, pw, 2 * len); 534 MD4_Final(ntbuffer, &MD4pw); 535 #elif defined(USE_GNUTLS_NETTLE) 536 struct md4_ctx MD4pw; 537 md4_init(&MD4pw); 538 md4_update(&MD4pw, (unsigned int)(2 * len), pw); 539 md4_digest(&MD4pw, MD4_DIGEST_SIZE, ntbuffer); 540 #elif defined(USE_GNUTLS) 541 gcry_md_hd_t MD4pw; 542 gcry_md_open(&MD4pw, GCRY_MD_MD4, 0); 543 gcry_md_write(MD4pw, pw, 2 * len); 544 memcpy (ntbuffer, gcry_md_read (MD4pw, 0), MD4_DIGEST_LENGTH); 545 gcry_md_close(MD4pw); 546 #elif defined(USE_NSS) || defined(USE_OS400CRYPTO) 547 Curl_md4it(ntbuffer, pw, 2 * len); 548 #elif defined(USE_DARWINSSL) 549 (void)CC_MD4(pw, (CC_LONG)(2 * len), ntbuffer); 550 #elif defined(USE_WIN32_CRYPTO) 551 HCRYPTPROV hprov; 552 if(CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL, 553 CRYPT_VERIFYCONTEXT)) { 554 HCRYPTHASH hhash; 555 if(CryptCreateHash(hprov, CALG_MD4, 0, 0, &hhash)) { 556 DWORD length = 16; 557 CryptHashData(hhash, pw, (unsigned int)len * 2, 0); 558 CryptGetHashParam(hhash, HP_HASHVAL, ntbuffer, &length, 0); 559 CryptDestroyHash(hhash); 560 } 561 CryptReleaseContext(hprov, 0); 562 } 563 #endif 564 565 memset(ntbuffer + 16, 0, 21 - 16); 566 } 567 568 free(pw); 569 570 return CURLE_OK; 571 } 572 573 #if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI) 574 575 /* This returns the HMAC MD5 digest */ 576 CURLcode Curl_hmac_md5(const unsigned char *key, unsigned int keylen, 577 const unsigned char *data, unsigned int datalen, 578 unsigned char *output) 579 { 580 HMAC_context *ctxt = Curl_HMAC_init(Curl_HMAC_MD5, key, keylen); 581 582 if(!ctxt) 583 return CURLE_OUT_OF_MEMORY; 584 585 /* Update the digest with the given challenge */ 586 Curl_HMAC_update(ctxt, data, datalen); 587 588 /* Finalise the digest */ 589 Curl_HMAC_final(ctxt, output); 590 591 return CURLE_OK; 592 } 593 594 /* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode 595 * (uppercase UserName + Domain) as the data 596 */ 597 CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen, 598 const char *domain, size_t domlen, 599 unsigned char *ntlmhash, 600 unsigned char *ntlmv2hash) 601 { 602 /* Unicode representation */ 603 size_t identity_len = (userlen + domlen) * 2; 604 unsigned char *identity = malloc(identity_len); 605 CURLcode result = CURLE_OK; 606 607 if(!identity) 608 return CURLE_OUT_OF_MEMORY; 609 610 ascii_uppercase_to_unicode_le(identity, user, userlen); 611 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen); 612 613 result = Curl_hmac_md5(ntlmhash, 16, identity, curlx_uztoui(identity_len), 614 ntlmv2hash); 615 616 free(identity); 617 618 return result; 619 } 620 621 /* 622 * Curl_ntlm_core_mk_ntlmv2_resp() 623 * 624 * This creates the NTLMv2 response as set in the ntlm type-3 message. 625 * 626 * Parameters: 627 * 628 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes) 629 * challenge_client [in] - The client nonce (8 bytes) 630 * ntlm [in] - The ntlm data struct being used to read TargetInfo 631 and Server challenge received in the type-2 message 632 * ntresp [out] - The address where a pointer to newly allocated 633 * memory holding the NTLMv2 response. 634 * ntresp_len [out] - The length of the output message. 635 * 636 * Returns CURLE_OK on success. 637 */ 638 CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash, 639 unsigned char *challenge_client, 640 struct ntlmdata *ntlm, 641 unsigned char **ntresp, 642 unsigned int *ntresp_len) 643 { 644 /* NTLMv2 response structure : 645 ------------------------------------------------------------------------------ 646 0 HMAC MD5 16 bytes 647 ------BLOB-------------------------------------------------------------------- 648 16 Signature 0x01010000 649 20 Reserved long (0x00000000) 650 24 Timestamp LE, 64-bit signed value representing the number of 651 tenths of a microsecond since January 1, 1601. 652 32 Client Nonce 8 bytes 653 40 Unknown 4 bytes 654 44 Target Info N bytes (from the type-2 message) 655 44+N Unknown 4 bytes 656 ------------------------------------------------------------------------------ 657 */ 658 659 unsigned int len = 0; 660 unsigned char *ptr = NULL; 661 unsigned char hmac_output[NTLM_HMAC_MD5_LEN]; 662 curl_off_t tw; 663 664 CURLcode result = CURLE_OK; 665 666 #if CURL_SIZEOF_CURL_OFF_T < 8 667 #error "this section needs 64bit support to work" 668 #endif 669 670 /* Calculate the timestamp */ 671 #ifdef DEBUGBUILD 672 char *force_timestamp = getenv("CURL_FORCETIME"); 673 if(force_timestamp) 674 tw = CURL_OFF_T_C(11644473600) * 10000000; 675 else 676 #endif 677 tw = ((curl_off_t)time(NULL) + CURL_OFF_T_C(11644473600)) * 10000000; 678 679 /* Calculate the response len */ 680 len = NTLM_HMAC_MD5_LEN + NTLMv2_BLOB_LEN; 681 682 /* Allocate the response */ 683 ptr = malloc(len); 684 if(!ptr) 685 return CURLE_OUT_OF_MEMORY; 686 687 memset(ptr, 0, len); 688 689 /* Create the BLOB structure */ 690 snprintf((char *)ptr + NTLM_HMAC_MD5_LEN, NTLMv2_BLOB_LEN, 691 NTLMv2_BLOB_SIGNATURE 692 "%c%c%c%c", /* Reserved = 0 */ 693 0, 0, 0, 0); 694 695 Curl_write64_le(tw, ptr + 24); 696 memcpy(ptr + 32, challenge_client, 8); 697 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len); 698 699 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */ 700 memcpy(ptr + 8, &ntlm->nonce[0], 8); 701 result = Curl_hmac_md5(ntlmv2hash, NTLM_HMAC_MD5_LEN, ptr + 8, 702 NTLMv2_BLOB_LEN + 8, hmac_output); 703 if(result) { 704 free(ptr); 705 return result; 706 } 707 708 /* Concatenate the HMAC MD5 output with the BLOB */ 709 memcpy(ptr, hmac_output, NTLM_HMAC_MD5_LEN); 710 711 /* Return the response */ 712 *ntresp = ptr; 713 *ntresp_len = len; 714 715 return result; 716 } 717 718 /* 719 * Curl_ntlm_core_mk_lmv2_resp() 720 * 721 * This creates the LMv2 response as used in the ntlm type-3 message. 722 * 723 * Parameters: 724 * 725 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes) 726 * challenge_client [in] - The client nonce (8 bytes) 727 * challenge_client [in] - The server challenge (8 bytes) 728 * lmresp [out] - The LMv2 response (24 bytes) 729 * 730 * Returns CURLE_OK on success. 731 */ 732 CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash, 733 unsigned char *challenge_client, 734 unsigned char *challenge_server, 735 unsigned char *lmresp) 736 { 737 unsigned char data[16]; 738 unsigned char hmac_output[16]; 739 CURLcode result = CURLE_OK; 740 741 memcpy(&data[0], challenge_server, 8); 742 memcpy(&data[8], challenge_client, 8); 743 744 result = Curl_hmac_md5(ntlmv2hash, 16, &data[0], 16, hmac_output); 745 if(result) 746 return result; 747 748 /* Concatenate the HMAC MD5 output with the client nonce */ 749 memcpy(lmresp, hmac_output, 16); 750 memcpy(lmresp+16, challenge_client, 8); 751 752 return result; 753 } 754 755 #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */ 756 757 #endif /* USE_NTRESPONSES */ 758 759 #endif /* !USE_WINDOWS_SSPI || USE_WIN32_CRYPTO */ 760 761 #endif /* USE_NTLM */ 762
