1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@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.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "curl_setup.h"
26
27 #if defined(USE_CURL_NTLM_CORE)
28
29 /*
30 * NTLM details:
31 *
32 * https://davenport.sourceforge.net/ntlm.html
33 * https://www.innovation.ch/java/ntlm.html
34 */
35
36 /* Please keep the SSL backend-specific #if branches in this order:
37
38 1. USE_OPENSSL
39 2. USE_WOLFSSL
40 3. USE_GNUTLS
41 4. -
42 5. USE_MBEDTLS
43 6. USE_SECTRANSP
44 7. USE_OS400CRYPTO
45 8. USE_WIN32_CRYPTO
46
47 This ensures that:
48 - the same SSL branch gets activated throughout this source
49 file even if multiple backends are enabled at the same time.
50 - OpenSSL has higher priority than Windows Crypt, due
51 to issues with the latter supporting NTLM2Session responses
52 in NTLM type-3 messages.
53 */
54
55 #if defined(USE_OPENSSL)
56 #include <openssl/opensslconf.h>
57 #if !defined(OPENSSL_NO_DES) && !defined(OPENSSL_NO_DEPRECATED_3_0)
58 #define USE_OPENSSL_DES
59 #endif
60 #endif
61
62 #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
63
64 #if defined(USE_OPENSSL)
65 # include <openssl/des.h>
66 # include <openssl/md5.h>
67 # include <openssl/ssl.h>
68 # include <openssl/rand.h>
69 #else
70 # include <wolfssl/options.h>
71 # include <wolfssl/openssl/des.h>
72 # include <wolfssl/openssl/md5.h>
73 # include <wolfssl/openssl/ssl.h>
74 # include <wolfssl/openssl/rand.h>
75 #endif
76
77 # if (defined(OPENSSL_VERSION_NUMBER) && \
78 (OPENSSL_VERSION_NUMBER < 0x00907001L)) && !defined(USE_WOLFSSL)
79 # define DES_key_schedule des_key_schedule
80 # define DES_cblock des_cblock
81 # define DES_set_odd_parity des_set_odd_parity
82 # define DES_set_key des_set_key
83 # define DES_ecb_encrypt des_ecb_encrypt
84 # define DESKEY(x) x
85 # define DESKEYARG(x) x
86 # elif defined(OPENSSL_IS_AWSLC)
87 # define DES_set_key_unchecked (void)DES_set_key
88 # define DESKEYARG(x) *x
89 # define DESKEY(x) &x
90 # else
91 # define DESKEYARG(x) *x
92 # define DESKEY(x) &x
93 # endif
94
95 #elif defined(USE_GNUTLS)
96
97 # include <nettle/des.h>
98
99 #elif defined(USE_MBEDTLS)
100
101 # include <mbedtls/des.h>
102
103 #elif defined(USE_SECTRANSP)
104
105 # include <CommonCrypto/CommonCryptor.h>
106 # include <CommonCrypto/CommonDigest.h>
107
108 #elif defined(USE_OS400CRYPTO)
109 # include "cipher.mih" /* mih/cipher */
110 #elif defined(USE_WIN32_CRYPTO)
111 # include <wincrypt.h>
112 #else
113 # error "Can't compile NTLM support without a crypto library with DES."
114 # define CURL_NTLM_NOT_SUPPORTED
115 #endif
116
117 #include "urldata.h"
118 #include "strcase.h"
119 #include "curl_ntlm_core.h"
120 #include "curl_md5.h"
121 #include "curl_hmac.h"
122 #include "warnless.h"
123 #include "curl_endian.h"
124 #include "curl_des.h"
125 #include "curl_md4.h"
126 /* The last 3 #include files should be in this order */
127 #include "curl_printf.h"
128 #include "curl_memory.h"
129 #include "memdebug.h"
130
131 #define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00"
132 #define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4)
133
134 #if !defined(CURL_NTLM_NOT_SUPPORTED)
135 /*
136 * Turns a 56-bit key into being 64-bit wide.
137 */
extend_key_56_to_64(const unsigned char * key_56,char * key)138 static void extend_key_56_to_64(const unsigned char *key_56, char *key)
139 {
140 key[0] = (char)key_56[0];
141 key[1] = (char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
142 key[2] = (char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
143 key[3] = (char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
144 key[4] = (char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
145 key[5] = (char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
146 key[6] = (char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
147 key[7] = (char) ((key_56[6] << 1) & 0xFF);
148 }
149 #endif
150
151 #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
152 /*
153 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The
154 * key schedule ks is also set.
155 */
setup_des_key(const unsigned char * key_56,DES_key_schedule DESKEYARG (ks))156 static void setup_des_key(const unsigned char *key_56,
157 DES_key_schedule DESKEYARG(ks))
158 {
159 DES_cblock key;
160
161 /* Expand the 56-bit key to 64-bits */
162 extend_key_56_to_64(key_56, (char *) &key);
163
164 /* Set the key parity to odd */
165 DES_set_odd_parity(&key);
166
167 /* Set the key */
168 DES_set_key_unchecked(&key, ks);
169 }
170
171 #elif defined(USE_GNUTLS)
172
setup_des_key(const unsigned char * key_56,struct des_ctx * des)173 static void setup_des_key(const unsigned char *key_56,
174 struct des_ctx *des)
175 {
176 char key[8];
177
178 /* Expand the 56-bit key to 64-bits */
179 extend_key_56_to_64(key_56, key);
180
181 /* Set the key parity to odd */
182 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
183
184 /* Set the key */
185 des_set_key(des, (const uint8_t *) key);
186 }
187
188 #elif defined(USE_MBEDTLS)
189
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)190 static bool encrypt_des(const unsigned char *in, unsigned char *out,
191 const unsigned char *key_56)
192 {
193 mbedtls_des_context ctx;
194 char key[8];
195
196 /* Expand the 56-bit key to 64-bits */
197 extend_key_56_to_64(key_56, key);
198
199 /* Set the key parity to odd */
200 mbedtls_des_key_set_parity((unsigned char *) key);
201
202 /* Perform the encryption */
203 mbedtls_des_init(&ctx);
204 mbedtls_des_setkey_enc(&ctx, (unsigned char *) key);
205 return mbedtls_des_crypt_ecb(&ctx, in, out) == 0;
206 }
207
208 #elif defined(USE_SECTRANSP)
209
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)210 static bool encrypt_des(const unsigned char *in, unsigned char *out,
211 const unsigned char *key_56)
212 {
213 char key[8];
214 size_t out_len;
215 CCCryptorStatus err;
216
217 /* Expand the 56-bit key to 64-bits */
218 extend_key_56_to_64(key_56, key);
219
220 /* Set the key parity to odd */
221 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
222
223 /* Perform the encryption */
224 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
225 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
226 8 /* outbuflen */, &out_len);
227
228 return err == kCCSuccess;
229 }
230
231 #elif defined(USE_OS400CRYPTO)
232
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)233 static bool encrypt_des(const unsigned char *in, unsigned char *out,
234 const unsigned char *key_56)
235 {
236 char key[8];
237 _CIPHER_Control_T ctl;
238
239 /* Setup the cipher control structure */
240 ctl.Func_ID = ENCRYPT_ONLY;
241 ctl.Data_Len = sizeof(key);
242
243 /* Expand the 56-bit key to 64-bits */
244 extend_key_56_to_64(key_56, ctl.Crypto_Key);
245
246 /* Set the key parity to odd */
247 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
248
249 /* Perform the encryption */
250 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
251
252 return TRUE;
253 }
254
255 #elif defined(USE_WIN32_CRYPTO)
256
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)257 static bool encrypt_des(const unsigned char *in, unsigned char *out,
258 const unsigned char *key_56)
259 {
260 HCRYPTPROV hprov;
261 HCRYPTKEY hkey;
262 struct {
263 BLOBHEADER hdr;
264 unsigned int len;
265 char key[8];
266 } blob;
267 DWORD len = 8;
268
269 /* Acquire the crypto provider */
270 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
271 CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
272 return FALSE;
273
274 /* Setup the key blob structure */
275 memset(&blob, 0, sizeof(blob));
276 blob.hdr.bType = PLAINTEXTKEYBLOB;
277 blob.hdr.bVersion = 2;
278 blob.hdr.aiKeyAlg = CALG_DES;
279 blob.len = sizeof(blob.key);
280
281 /* Expand the 56-bit key to 64-bits */
282 extend_key_56_to_64(key_56, blob.key);
283
284 /* Set the key parity to odd */
285 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
286
287 /* Import the key */
288 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
289 CryptReleaseContext(hprov, 0);
290
291 return FALSE;
292 }
293
294 memcpy(out, in, 8);
295
296 /* Perform the encryption */
297 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
298
299 CryptDestroyKey(hkey);
300 CryptReleaseContext(hprov, 0);
301
302 return TRUE;
303 }
304
305 #endif /* defined(USE_WIN32_CRYPTO) */
306
307 /*
308 * takes a 21 byte array and treats it as 3 56-bit DES keys. The
309 * 8 byte plaintext is encrypted with each key and the resulting 24
310 * bytes are stored in the results array.
311 */
Curl_ntlm_core_lm_resp(const unsigned char * keys,const unsigned char * plaintext,unsigned char * results)312 void Curl_ntlm_core_lm_resp(const unsigned char *keys,
313 const unsigned char *plaintext,
314 unsigned char *results)
315 {
316 #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
317 DES_key_schedule ks;
318
319 setup_des_key(keys, DESKEY(ks));
320 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
321 DESKEY(ks), DES_ENCRYPT);
322
323 setup_des_key(keys + 7, DESKEY(ks));
324 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
325 DESKEY(ks), DES_ENCRYPT);
326
327 setup_des_key(keys + 14, DESKEY(ks));
328 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
329 DESKEY(ks), DES_ENCRYPT);
330 #elif defined(USE_GNUTLS)
331 struct des_ctx des;
332 setup_des_key(keys, &des);
333 des_encrypt(&des, 8, results, plaintext);
334 setup_des_key(keys + 7, &des);
335 des_encrypt(&des, 8, results + 8, plaintext);
336 setup_des_key(keys + 14, &des);
337 des_encrypt(&des, 8, results + 16, plaintext);
338 #elif defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
339 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
340 encrypt_des(plaintext, results, keys);
341 encrypt_des(plaintext, results + 8, keys + 7);
342 encrypt_des(plaintext, results + 16, keys + 14);
343 #else
344 (void)keys;
345 (void)plaintext;
346 (void)results;
347 #endif
348 }
349
350 /*
351 * Set up lanmanager hashed password
352 */
Curl_ntlm_core_mk_lm_hash(const char * password,unsigned char * lmbuffer)353 CURLcode Curl_ntlm_core_mk_lm_hash(const char *password,
354 unsigned char *lmbuffer /* 21 bytes */)
355 {
356 unsigned char pw[14];
357 #if !defined(CURL_NTLM_NOT_SUPPORTED)
358 static const unsigned char magic[] = {
359 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
360 };
361 #endif
362 size_t len = CURLMIN(strlen(password), 14);
363
364 Curl_strntoupper((char *)pw, password, len);
365 memset(&pw[len], 0, 14 - len);
366
367 {
368 /* Create LanManager hashed password. */
369
370 #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
371 DES_key_schedule ks;
372
373 setup_des_key(pw, DESKEY(ks));
374 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
375 DESKEY(ks), DES_ENCRYPT);
376
377 setup_des_key(pw + 7, DESKEY(ks));
378 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
379 DESKEY(ks), DES_ENCRYPT);
380 #elif defined(USE_GNUTLS)
381 struct des_ctx des;
382 setup_des_key(pw, &des);
383 des_encrypt(&des, 8, lmbuffer, magic);
384 setup_des_key(pw + 7, &des);
385 des_encrypt(&des, 8, lmbuffer + 8, magic);
386 #elif defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
387 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
388 encrypt_des(magic, lmbuffer, pw);
389 encrypt_des(magic, lmbuffer + 8, pw + 7);
390 #endif
391
392 memset(lmbuffer + 16, 0, 21 - 16);
393 }
394
395 return CURLE_OK;
396 }
397
ascii_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)398 static void ascii_to_unicode_le(unsigned char *dest, const char *src,
399 size_t srclen)
400 {
401 size_t i;
402 for(i = 0; i < srclen; i++) {
403 dest[2 * i] = (unsigned char)src[i];
404 dest[2 * i + 1] = '\0';
405 }
406 }
407
408 #if !defined(USE_WINDOWS_SSPI)
409
ascii_uppercase_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)410 static void ascii_uppercase_to_unicode_le(unsigned char *dest,
411 const char *src, size_t srclen)
412 {
413 size_t i;
414 for(i = 0; i < srclen; i++) {
415 dest[2 * i] = (unsigned char)(Curl_raw_toupper(src[i]));
416 dest[2 * i + 1] = '\0';
417 }
418 }
419
420 #endif /* !USE_WINDOWS_SSPI */
421
422 /*
423 * Set up nt hashed passwords
424 * @unittest: 1600
425 */
Curl_ntlm_core_mk_nt_hash(const char * password,unsigned char * ntbuffer)426 CURLcode Curl_ntlm_core_mk_nt_hash(const char *password,
427 unsigned char *ntbuffer /* 21 bytes */)
428 {
429 size_t len = strlen(password);
430 unsigned char *pw;
431 CURLcode result;
432 if(len > SIZE_T_MAX/2) /* avoid integer overflow */
433 return CURLE_OUT_OF_MEMORY;
434 pw = len ? malloc(len * 2) : (unsigned char *)strdup("");
435 if(!pw)
436 return CURLE_OUT_OF_MEMORY;
437
438 ascii_to_unicode_le(pw, password, len);
439
440 /* Create NT hashed password. */
441 result = Curl_md4it(ntbuffer, pw, 2 * len);
442 if(!result)
443 memset(ntbuffer + 16, 0, 21 - 16);
444
445 free(pw);
446
447 return result;
448 }
449
450 #if !defined(USE_WINDOWS_SSPI)
451
452 /* Timestamp in tenths of a microsecond since January 1, 1601 00:00:00 UTC. */
453 struct ms_filetime {
454 unsigned int dwLowDateTime;
455 unsigned int dwHighDateTime;
456 };
457
458 /* Convert a time_t to an MS FILETIME (MS-DTYP section 2.3.3). */
time2filetime(struct ms_filetime * ft,time_t t)459 static void time2filetime(struct ms_filetime *ft, time_t t)
460 {
461 #if SIZEOF_TIME_T > 4
462 t = (t + CURL_OFF_T_C(11644473600)) * 10000000;
463 ft->dwLowDateTime = (unsigned int) (t & 0xFFFFFFFF);
464 ft->dwHighDateTime = (unsigned int) (t >> 32);
465 #else
466 unsigned int r, s;
467 unsigned int i;
468
469 ft->dwLowDateTime = (unsigned int)t & 0xFFFFFFFF;
470 ft->dwHighDateTime = 0;
471
472 # ifndef HAVE_TIME_T_UNSIGNED
473 /* Extend sign if needed. */
474 if(ft->dwLowDateTime & 0x80000000)
475 ft->dwHighDateTime = ~(unsigned int)0;
476 # endif
477
478 /* Bias seconds to Jan 1, 1601.
479 134774 days = 11644473600 seconds = 0x2B6109100 */
480 r = ft->dwLowDateTime;
481 ft->dwLowDateTime = (ft->dwLowDateTime + 0xB6109100U) & 0xFFFFFFFF;
482 ft->dwHighDateTime += ft->dwLowDateTime < r? 0x03: 0x02;
483
484 /* Convert to tenths of microseconds. */
485 ft->dwHighDateTime *= 10000000;
486 i = 32;
487 do {
488 i -= 8;
489 s = ((ft->dwLowDateTime >> i) & 0xFF) * (10000000 - 1);
490 r = (s << i) & 0xFFFFFFFF;
491 s >>= 1; /* Split shift to avoid width overflow. */
492 s >>= 31 - i;
493 ft->dwLowDateTime = (ft->dwLowDateTime + r) & 0xFFFFFFFF;
494 if(ft->dwLowDateTime < r)
495 s++;
496 ft->dwHighDateTime += s;
497 } while(i);
498 ft->dwHighDateTime &= 0xFFFFFFFF;
499 #endif
500 }
501
502 /* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
503 * (uppercase UserName + Domain) as the data
504 */
Curl_ntlm_core_mk_ntlmv2_hash(const char * user,size_t userlen,const char * domain,size_t domlen,unsigned char * ntlmhash,unsigned char * ntlmv2hash)505 CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
506 const char *domain, size_t domlen,
507 unsigned char *ntlmhash,
508 unsigned char *ntlmv2hash)
509 {
510 /* Unicode representation */
511 size_t identity_len;
512 unsigned char *identity;
513 CURLcode result = CURLE_OK;
514
515 if((userlen > CURL_MAX_INPUT_LENGTH) || (domlen > CURL_MAX_INPUT_LENGTH))
516 return CURLE_OUT_OF_MEMORY;
517
518 identity_len = (userlen + domlen) * 2;
519 identity = malloc(identity_len + 1);
520
521 if(!identity)
522 return CURLE_OUT_OF_MEMORY;
523
524 ascii_uppercase_to_unicode_le(identity, user, userlen);
525 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
526
527 result = Curl_hmacit(Curl_HMAC_MD5, ntlmhash, 16, identity, identity_len,
528 ntlmv2hash);
529 free(identity);
530
531 return result;
532 }
533
534 /*
535 * Curl_ntlm_core_mk_ntlmv2_resp()
536 *
537 * This creates the NTLMv2 response as set in the ntlm type-3 message.
538 *
539 * Parameters:
540 *
541 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
542 * challenge_client [in] - The client nonce (8 bytes)
543 * ntlm [in] - The ntlm data struct being used to read TargetInfo
544 and Server challenge received in the type-2 message
545 * ntresp [out] - The address where a pointer to newly allocated
546 * memory holding the NTLMv2 response.
547 * ntresp_len [out] - The length of the output message.
548 *
549 * Returns CURLE_OK on success.
550 */
Curl_ntlm_core_mk_ntlmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,struct ntlmdata * ntlm,unsigned char ** ntresp,unsigned int * ntresp_len)551 CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
552 unsigned char *challenge_client,
553 struct ntlmdata *ntlm,
554 unsigned char **ntresp,
555 unsigned int *ntresp_len)
556 {
557 /* NTLMv2 response structure :
558 ------------------------------------------------------------------------------
559 0 HMAC MD5 16 bytes
560 ------BLOB--------------------------------------------------------------------
561 16 Signature 0x01010000
562 20 Reserved long (0x00000000)
563 24 Timestamp LE, 64-bit signed value representing the number of
564 tenths of a microsecond since January 1, 1601.
565 32 Client Nonce 8 bytes
566 40 Unknown 4 bytes
567 44 Target Info N bytes (from the type-2 message)
568 44+N Unknown 4 bytes
569 ------------------------------------------------------------------------------
570 */
571
572 unsigned int len = 0;
573 unsigned char *ptr = NULL;
574 unsigned char hmac_output[HMAC_MD5_LENGTH];
575 struct ms_filetime tw;
576
577 CURLcode result = CURLE_OK;
578
579 /* Calculate the timestamp */
580 #ifdef DEBUGBUILD
581 char *force_timestamp = getenv("CURL_FORCETIME");
582 if(force_timestamp)
583 time2filetime(&tw, (time_t) 0);
584 else
585 #endif
586 time2filetime(&tw, time(NULL));
587
588 /* Calculate the response len */
589 len = HMAC_MD5_LENGTH + NTLMv2_BLOB_LEN;
590
591 /* Allocate the response */
592 ptr = calloc(1, len);
593 if(!ptr)
594 return CURLE_OUT_OF_MEMORY;
595
596 /* Create the BLOB structure */
597 msnprintf((char *)ptr + HMAC_MD5_LENGTH, NTLMv2_BLOB_LEN,
598 "%c%c%c%c" /* NTLMv2_BLOB_SIGNATURE */
599 "%c%c%c%c" /* Reserved = 0 */
600 "%c%c%c%c%c%c%c%c", /* Timestamp */
601 NTLMv2_BLOB_SIGNATURE[0], NTLMv2_BLOB_SIGNATURE[1],
602 NTLMv2_BLOB_SIGNATURE[2], NTLMv2_BLOB_SIGNATURE[3],
603 0, 0, 0, 0,
604 LONGQUARTET(tw.dwLowDateTime), LONGQUARTET(tw.dwHighDateTime));
605
606 memcpy(ptr + 32, challenge_client, 8);
607 if(ntlm->target_info_len)
608 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
609
610 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
611 memcpy(ptr + 8, &ntlm->nonce[0], 8);
612 result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, HMAC_MD5_LENGTH, ptr + 8,
613 NTLMv2_BLOB_LEN + 8, hmac_output);
614 if(result) {
615 free(ptr);
616 return result;
617 }
618
619 /* Concatenate the HMAC MD5 output with the BLOB */
620 memcpy(ptr, hmac_output, HMAC_MD5_LENGTH);
621
622 /* Return the response */
623 *ntresp = ptr;
624 *ntresp_len = len;
625
626 return result;
627 }
628
629 /*
630 * Curl_ntlm_core_mk_lmv2_resp()
631 *
632 * This creates the LMv2 response as used in the ntlm type-3 message.
633 *
634 * Parameters:
635 *
636 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
637 * challenge_client [in] - The client nonce (8 bytes)
638 * challenge_client [in] - The server challenge (8 bytes)
639 * lmresp [out] - The LMv2 response (24 bytes)
640 *
641 * Returns CURLE_OK on success.
642 */
Curl_ntlm_core_mk_lmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,unsigned char * challenge_server,unsigned char * lmresp)643 CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
644 unsigned char *challenge_client,
645 unsigned char *challenge_server,
646 unsigned char *lmresp)
647 {
648 unsigned char data[16];
649 unsigned char hmac_output[16];
650 CURLcode result = CURLE_OK;
651
652 memcpy(&data[0], challenge_server, 8);
653 memcpy(&data[8], challenge_client, 8);
654
655 result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, 16, &data[0], 16,
656 hmac_output);
657 if(result)
658 return result;
659
660 /* Concatenate the HMAC MD5 output with the client nonce */
661 memcpy(lmresp, hmac_output, 16);
662 memcpy(lmresp + 16, challenge_client, 8);
663
664 return result;
665 }
666
667 #endif /* !USE_WINDOWS_SSPI */
668
669 #endif /* USE_CURL_NTLM_CORE */
670
