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 #elif defined(USE_WOLFSSL)
61 #include <wolfssl/options.h>
62 #if !defined(NO_DES3)
63 #define USE_OPENSSL_DES
64 #endif
65 #endif
66
67 #if defined(USE_OPENSSL_DES)
68
69 #if defined(USE_OPENSSL)
70 # include <openssl/des.h>
71 # include <openssl/md5.h>
72 # include <openssl/ssl.h>
73 # include <openssl/rand.h>
74 #else
75 # include <wolfssl/openssl/des.h>
76 # include <wolfssl/openssl/md5.h>
77 # include <wolfssl/openssl/ssl.h>
78 # include <wolfssl/openssl/rand.h>
79 #endif
80
81 # if (defined(OPENSSL_VERSION_NUMBER) && \
82 (OPENSSL_VERSION_NUMBER < 0x00907001L)) && !defined(USE_WOLFSSL)
83 # define DES_key_schedule des_key_schedule
84 # define DES_cblock des_cblock
85 # define DES_set_odd_parity des_set_odd_parity
86 # define DES_set_key des_set_key
87 # define DES_ecb_encrypt des_ecb_encrypt
88 # define DESKEY(x) x
89 # define DESKEYARG(x) x
90 # elif defined(OPENSSL_IS_AWSLC)
91 # define DES_set_key_unchecked (void)DES_set_key
92 # define DESKEYARG(x) *x
93 # define DESKEY(x) &x
94 # else
95 # define DESKEYARG(x) *x
96 # define DESKEY(x) &x
97 # endif
98
99 #elif defined(USE_GNUTLS)
100
101 # include <nettle/des.h>
102
103 #elif defined(USE_MBEDTLS)
104
105 # include <mbedtls/des.h>
106
107 #elif defined(USE_SECTRANSP)
108
109 # include <CommonCrypto/CommonCryptor.h>
110 # include <CommonCrypto/CommonDigest.h>
111
112 #elif defined(USE_OS400CRYPTO)
113 # include "cipher.mih" /* mih/cipher */
114 #elif defined(USE_WIN32_CRYPTO)
115 # include <wincrypt.h>
116 #else
117 # error "cannot compile NTLM support without a crypto library with DES."
118 # define CURL_NTLM_NOT_SUPPORTED
119 #endif
120
121 #include "urldata.h"
122 #include "strcase.h"
123 #include "curl_ntlm_core.h"
124 #include "curl_md5.h"
125 #include "curl_hmac.h"
126 #include "warnless.h"
127 #include "curl_endian.h"
128 #include "curl_des.h"
129 #include "curl_md4.h"
130 /* The last 3 #include files should be in this order */
131 #include "curl_printf.h"
132 #include "curl_memory.h"
133 #include "memdebug.h"
134
135 #define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00"
136 #define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4)
137
138 #if !defined(CURL_NTLM_NOT_SUPPORTED)
139 /*
140 * Turns a 56-bit key into being 64-bit wide.
141 */
extend_key_56_to_64(const unsigned char * key_56,char * key)142 static void extend_key_56_to_64(const unsigned char *key_56, char *key)
143 {
144 key[0] = (char)key_56[0];
145 key[1] = (char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
146 key[2] = (char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
147 key[3] = (char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
148 key[4] = (char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
149 key[5] = (char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
150 key[6] = (char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
151 key[7] = (char) ((key_56[6] << 1) & 0xFF);
152 }
153 #endif
154
155 #if defined(USE_OPENSSL_DES)
156 /*
157 * Turns a 56-bit key into a 64-bit, odd parity key and sets the key. The
158 * key schedule ks is also set.
159 */
setup_des_key(const unsigned char * key_56,DES_key_schedule DESKEYARG (ks))160 static void setup_des_key(const unsigned char *key_56,
161 DES_key_schedule DESKEYARG(ks))
162 {
163 DES_cblock key;
164
165 /* Expand the 56-bit key to 64 bits */
166 extend_key_56_to_64(key_56, (char *) &key);
167
168 /* Set the key parity to odd */
169 DES_set_odd_parity(&key);
170
171 /* Set the key */
172 DES_set_key_unchecked(&key, ks);
173 }
174
175 #elif defined(USE_GNUTLS)
176
setup_des_key(const unsigned char * key_56,struct des_ctx * des)177 static void setup_des_key(const unsigned char *key_56,
178 struct des_ctx *des)
179 {
180 char key[8];
181
182 /* Expand the 56-bit key to 64 bits */
183 extend_key_56_to_64(key_56, key);
184
185 /* Set the key parity to odd */
186 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
187
188 /* Set the key */
189 des_set_key(des, (const uint8_t *) key);
190 }
191
192 #elif defined(USE_MBEDTLS)
193
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)194 static bool encrypt_des(const unsigned char *in, unsigned char *out,
195 const unsigned char *key_56)
196 {
197 mbedtls_des_context ctx;
198 char key[8];
199
200 /* Expand the 56-bit key to 64 bits */
201 extend_key_56_to_64(key_56, key);
202
203 /* Set the key parity to odd */
204 mbedtls_des_key_set_parity((unsigned char *) key);
205
206 /* Perform the encryption */
207 mbedtls_des_init(&ctx);
208 mbedtls_des_setkey_enc(&ctx, (unsigned char *) key);
209 return mbedtls_des_crypt_ecb(&ctx, in, out) == 0;
210 }
211
212 #elif defined(USE_SECTRANSP)
213
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)214 static bool encrypt_des(const unsigned char *in, unsigned char *out,
215 const unsigned char *key_56)
216 {
217 char key[8];
218 size_t out_len;
219 CCCryptorStatus err;
220
221 /* Expand the 56-bit key to 64 bits */
222 extend_key_56_to_64(key_56, key);
223
224 /* Set the key parity to odd */
225 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
226
227 /* Perform the encryption */
228 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
229 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
230 8 /* outbuflen */, &out_len);
231
232 return err == kCCSuccess;
233 }
234
235 #elif defined(USE_OS400CRYPTO)
236
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)237 static bool encrypt_des(const unsigned char *in, unsigned char *out,
238 const unsigned char *key_56)
239 {
240 char key[8];
241 _CIPHER_Control_T ctl;
242
243 /* Setup the cipher control structure */
244 ctl.Func_ID = ENCRYPT_ONLY;
245 ctl.Data_Len = sizeof(key);
246
247 /* Expand the 56-bit key to 64 bits */
248 extend_key_56_to_64(key_56, ctl.Crypto_Key);
249
250 /* Set the key parity to odd */
251 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
252
253 /* Perform the encryption */
254 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
255
256 return TRUE;
257 }
258
259 #elif defined(USE_WIN32_CRYPTO)
260
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)261 static bool encrypt_des(const unsigned char *in, unsigned char *out,
262 const unsigned char *key_56)
263 {
264 HCRYPTPROV hprov;
265 HCRYPTKEY hkey;
266 struct {
267 BLOBHEADER hdr;
268 unsigned int len;
269 char key[8];
270 } blob;
271 DWORD len = 8;
272
273 /* Acquire the crypto provider */
274 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
275 CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
276 return FALSE;
277
278 /* Setup the key blob structure */
279 memset(&blob, 0, sizeof(blob));
280 blob.hdr.bType = PLAINTEXTKEYBLOB;
281 blob.hdr.bVersion = 2;
282 blob.hdr.aiKeyAlg = CALG_DES;
283 blob.len = sizeof(blob.key);
284
285 /* Expand the 56-bit key to 64 bits */
286 extend_key_56_to_64(key_56, blob.key);
287
288 /* Set the key parity to odd */
289 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
290
291 /* Import the key */
292 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
293 CryptReleaseContext(hprov, 0);
294
295 return FALSE;
296 }
297
298 memcpy(out, in, 8);
299
300 /* Perform the encryption */
301 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
302
303 CryptDestroyKey(hkey);
304 CryptReleaseContext(hprov, 0);
305
306 return TRUE;
307 }
308
309 #endif /* defined(USE_WIN32_CRYPTO) */
310
311 /*
312 * takes a 21 byte array and treats it as 3 56-bit DES keys. The
313 * 8 byte plaintext is encrypted with each key and the resulting 24
314 * bytes are stored in the results array.
315 */
Curl_ntlm_core_lm_resp(const unsigned char * keys,const unsigned char * plaintext,unsigned char * results)316 void Curl_ntlm_core_lm_resp(const unsigned char *keys,
317 const unsigned char *plaintext,
318 unsigned char *results)
319 {
320 #if defined(USE_OPENSSL_DES)
321 DES_key_schedule ks;
322
323 setup_des_key(keys, DESKEY(ks));
324 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
325 DESKEY(ks), DES_ENCRYPT);
326
327 setup_des_key(keys + 7, DESKEY(ks));
328 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
329 DESKEY(ks), DES_ENCRYPT);
330
331 setup_des_key(keys + 14, DESKEY(ks));
332 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
333 DESKEY(ks), DES_ENCRYPT);
334 #elif defined(USE_GNUTLS)
335 struct des_ctx des;
336 setup_des_key(keys, &des);
337 des_encrypt(&des, 8, results, plaintext);
338 setup_des_key(keys + 7, &des);
339 des_encrypt(&des, 8, results + 8, plaintext);
340 setup_des_key(keys + 14, &des);
341 des_encrypt(&des, 8, results + 16, plaintext);
342 #elif defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
343 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
344 encrypt_des(plaintext, results, keys);
345 encrypt_des(plaintext, results + 8, keys + 7);
346 encrypt_des(plaintext, results + 16, keys + 14);
347 #else
348 (void)keys;
349 (void)plaintext;
350 (void)results;
351 #endif
352 }
353
354 /*
355 * Set up lanmanager hashed password
356 */
Curl_ntlm_core_mk_lm_hash(const char * password,unsigned char * lmbuffer)357 CURLcode Curl_ntlm_core_mk_lm_hash(const char *password,
358 unsigned char *lmbuffer /* 21 bytes */)
359 {
360 unsigned char pw[14];
361 #if !defined(CURL_NTLM_NOT_SUPPORTED)
362 static const unsigned char magic[] = {
363 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
364 };
365 #endif
366 size_t len = CURLMIN(strlen(password), 14);
367
368 Curl_strntoupper((char *)pw, password, len);
369 memset(&pw[len], 0, 14 - len);
370
371 {
372 /* Create LanManager hashed password. */
373
374 #if defined(USE_OPENSSL_DES)
375 DES_key_schedule ks;
376
377 setup_des_key(pw, DESKEY(ks));
378 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
379 DESKEY(ks), DES_ENCRYPT);
380
381 setup_des_key(pw + 7, DESKEY(ks));
382 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
383 DESKEY(ks), DES_ENCRYPT);
384 #elif defined(USE_GNUTLS)
385 struct des_ctx des;
386 setup_des_key(pw, &des);
387 des_encrypt(&des, 8, lmbuffer, magic);
388 setup_des_key(pw + 7, &des);
389 des_encrypt(&des, 8, lmbuffer + 8, magic);
390 #elif defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
391 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
392 encrypt_des(magic, lmbuffer, pw);
393 encrypt_des(magic, lmbuffer + 8, pw + 7);
394 #endif
395
396 memset(lmbuffer + 16, 0, 21 - 16);
397 }
398
399 return CURLE_OK;
400 }
401
ascii_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)402 static void ascii_to_unicode_le(unsigned char *dest, const char *src,
403 size_t srclen)
404 {
405 size_t i;
406 for(i = 0; i < srclen; i++) {
407 dest[2 * i] = (unsigned char)src[i];
408 dest[2 * i + 1] = '\0';
409 }
410 }
411
412 #if !defined(USE_WINDOWS_SSPI)
413
ascii_uppercase_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)414 static void ascii_uppercase_to_unicode_le(unsigned char *dest,
415 const char *src, size_t srclen)
416 {
417 size_t i;
418 for(i = 0; i < srclen; i++) {
419 dest[2 * i] = (unsigned char)(Curl_raw_toupper(src[i]));
420 dest[2 * i + 1] = '\0';
421 }
422 }
423
424 #endif /* !USE_WINDOWS_SSPI */
425
426 /*
427 * Set up nt hashed passwords
428 * @unittest: 1600
429 */
Curl_ntlm_core_mk_nt_hash(const char * password,unsigned char * ntbuffer)430 CURLcode Curl_ntlm_core_mk_nt_hash(const char *password,
431 unsigned char *ntbuffer /* 21 bytes */)
432 {
433 size_t len = strlen(password);
434 unsigned char *pw;
435 CURLcode result;
436 if(len > SIZE_T_MAX/2) /* avoid integer overflow */
437 return CURLE_OUT_OF_MEMORY;
438 pw = len ? malloc(len * 2) : (unsigned char *)strdup("");
439 if(!pw)
440 return CURLE_OUT_OF_MEMORY;
441
442 ascii_to_unicode_le(pw, password, len);
443
444 /* Create NT hashed password. */
445 result = Curl_md4it(ntbuffer, pw, 2 * len);
446 if(!result)
447 memset(ntbuffer + 16, 0, 21 - 16);
448
449 free(pw);
450
451 return result;
452 }
453
454 #if !defined(USE_WINDOWS_SSPI)
455
456 /* Timestamp in tenths of a microsecond since January 1, 1601 00:00:00 UTC. */
457 struct ms_filetime {
458 unsigned int dwLowDateTime;
459 unsigned int dwHighDateTime;
460 };
461
462 /* Convert a time_t to an MS FILETIME (MS-DTYP section 2.3.3). */
time2filetime(struct ms_filetime * ft,time_t t)463 static void time2filetime(struct ms_filetime *ft, time_t t)
464 {
465 #if SIZEOF_TIME_T > 4
466 t = (t + CURL_OFF_T_C(11644473600)) * 10000000;
467 ft->dwLowDateTime = (unsigned int) (t & 0xFFFFFFFF);
468 ft->dwHighDateTime = (unsigned int) (t >> 32);
469 #else
470 unsigned int r, s;
471 unsigned int i;
472
473 ft->dwLowDateTime = (unsigned int)t & 0xFFFFFFFF;
474 ft->dwHighDateTime = 0;
475
476 # ifndef HAVE_TIME_T_UNSIGNED
477 /* Extend sign if needed. */
478 if(ft->dwLowDateTime & 0x80000000)
479 ft->dwHighDateTime = ~(unsigned int)0;
480 # endif
481
482 /* Bias seconds to Jan 1, 1601.
483 134774 days = 11644473600 seconds = 0x2B6109100 */
484 r = ft->dwLowDateTime;
485 ft->dwLowDateTime = (ft->dwLowDateTime + 0xB6109100U) & 0xFFFFFFFF;
486 ft->dwHighDateTime += ft->dwLowDateTime < r ? 0x03 : 0x02;
487
488 /* Convert to tenths of microseconds. */
489 ft->dwHighDateTime *= 10000000;
490 i = 32;
491 do {
492 i -= 8;
493 s = ((ft->dwLowDateTime >> i) & 0xFF) * (10000000 - 1);
494 r = (s << i) & 0xFFFFFFFF;
495 s >>= 1; /* Split shift to avoid width overflow. */
496 s >>= 31 - i;
497 ft->dwLowDateTime = (ft->dwLowDateTime + r) & 0xFFFFFFFF;
498 if(ft->dwLowDateTime < r)
499 s++;
500 ft->dwHighDateTime += s;
501 } while(i);
502 ft->dwHighDateTime &= 0xFFFFFFFF;
503 #endif
504 }
505
506 /* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
507 * (uppercase UserName + Domain) as the data
508 */
Curl_ntlm_core_mk_ntlmv2_hash(const char * user,size_t userlen,const char * domain,size_t domlen,unsigned char * ntlmhash,unsigned char * ntlmv2hash)509 CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
510 const char *domain, size_t domlen,
511 unsigned char *ntlmhash,
512 unsigned char *ntlmv2hash)
513 {
514 /* Unicode representation */
515 size_t identity_len;
516 unsigned char *identity;
517 CURLcode result = CURLE_OK;
518
519 if((userlen > CURL_MAX_INPUT_LENGTH) || (domlen > CURL_MAX_INPUT_LENGTH))
520 return CURLE_OUT_OF_MEMORY;
521
522 identity_len = (userlen + domlen) * 2;
523 identity = malloc(identity_len + 1);
524
525 if(!identity)
526 return CURLE_OUT_OF_MEMORY;
527
528 ascii_uppercase_to_unicode_le(identity, user, userlen);
529 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
530
531 result = Curl_hmacit(&Curl_HMAC_MD5, ntlmhash, 16, identity, identity_len,
532 ntlmv2hash);
533 free(identity);
534
535 return result;
536 }
537
538 /*
539 * Curl_ntlm_core_mk_ntlmv2_resp()
540 *
541 * This creates the NTLMv2 response as set in the NTLM type-3 message.
542 *
543 * Parameters:
544 *
545 * ntlmv2hash [in] - The NTLMv2 hash (16 bytes)
546 * challenge_client [in] - The client nonce (8 bytes)
547 * ntlm [in] - The NTLM data struct being used to read TargetInfo
548 and Server challenge received in the type-2 message
549 * ntresp [out] - The address where a pointer to newly allocated
550 * memory holding the NTLMv2 response.
551 * ntresp_len [out] - The length of the output message.
552 *
553 * Returns CURLE_OK on success.
554 */
Curl_ntlm_core_mk_ntlmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,struct ntlmdata * ntlm,unsigned char ** ntresp,unsigned int * ntresp_len)555 CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
556 unsigned char *challenge_client,
557 struct ntlmdata *ntlm,
558 unsigned char **ntresp,
559 unsigned int *ntresp_len)
560 {
561 /* NTLMv2 response structure :
562 ------------------------------------------------------------------------------
563 0 HMAC MD5 16 bytes
564 ------BLOB--------------------------------------------------------------------
565 16 Signature 0x01010000
566 20 Reserved long (0x00000000)
567 24 Timestamp LE, 64-bit signed value representing the number of
568 tenths of a microsecond since January 1, 1601.
569 32 Client Nonce 8 bytes
570 40 Unknown 4 bytes
571 44 Target Info N bytes (from the type-2 message)
572 44+N Unknown 4 bytes
573 ------------------------------------------------------------------------------
574 */
575
576 unsigned int len = 0;
577 unsigned char *ptr = NULL;
578 unsigned char hmac_output[HMAC_MD5_LENGTH];
579 struct ms_filetime tw;
580
581 CURLcode result = CURLE_OK;
582
583 /* Calculate the timestamp */
584 #ifdef DEBUGBUILD
585 char *force_timestamp = getenv("CURL_FORCETIME");
586 if(force_timestamp)
587 time2filetime(&tw, (time_t) 0);
588 else
589 #endif
590 time2filetime(&tw, time(NULL));
591
592 /* Calculate the response len */
593 len = HMAC_MD5_LENGTH + NTLMv2_BLOB_LEN;
594
595 /* Allocate the response */
596 ptr = calloc(1, len);
597 if(!ptr)
598 return CURLE_OUT_OF_MEMORY;
599
600 /* Create the BLOB structure */
601 msnprintf((char *)ptr + HMAC_MD5_LENGTH, NTLMv2_BLOB_LEN,
602 "%c%c%c%c" /* NTLMv2_BLOB_SIGNATURE */
603 "%c%c%c%c" /* Reserved = 0 */
604 "%c%c%c%c%c%c%c%c", /* Timestamp */
605 NTLMv2_BLOB_SIGNATURE[0], NTLMv2_BLOB_SIGNATURE[1],
606 NTLMv2_BLOB_SIGNATURE[2], NTLMv2_BLOB_SIGNATURE[3],
607 0, 0, 0, 0,
608 LONGQUARTET(tw.dwLowDateTime), LONGQUARTET(tw.dwHighDateTime));
609
610 memcpy(ptr + 32, challenge_client, 8);
611 if(ntlm->target_info_len)
612 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
613
614 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
615 memcpy(ptr + 8, &ntlm->nonce[0], 8);
616 result = Curl_hmacit(&Curl_HMAC_MD5, ntlmv2hash, HMAC_MD5_LENGTH, ptr + 8,
617 NTLMv2_BLOB_LEN + 8, hmac_output);
618 if(result) {
619 free(ptr);
620 return result;
621 }
622
623 /* Concatenate the HMAC MD5 output with the BLOB */
624 memcpy(ptr, hmac_output, HMAC_MD5_LENGTH);
625
626 /* Return the response */
627 *ntresp = ptr;
628 *ntresp_len = len;
629
630 return result;
631 }
632
633 /*
634 * Curl_ntlm_core_mk_lmv2_resp()
635 *
636 * This creates the LMv2 response as used in the NTLM type-3 message.
637 *
638 * Parameters:
639 *
640 * ntlmv2hash [in] - The NTLMv2 hash (16 bytes)
641 * challenge_client [in] - The client nonce (8 bytes)
642 * challenge_client [in] - The server challenge (8 bytes)
643 * lmresp [out] - The LMv2 response (24 bytes)
644 *
645 * Returns CURLE_OK on success.
646 */
Curl_ntlm_core_mk_lmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,unsigned char * challenge_server,unsigned char * lmresp)647 CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
648 unsigned char *challenge_client,
649 unsigned char *challenge_server,
650 unsigned char *lmresp)
651 {
652 unsigned char data[16];
653 unsigned char hmac_output[16];
654 CURLcode result = CURLE_OK;
655
656 memcpy(&data[0], challenge_server, 8);
657 memcpy(&data[8], challenge_client, 8);
658
659 result = Curl_hmacit(&Curl_HMAC_MD5, ntlmv2hash, 16, &data[0], 16,
660 hmac_output);
661 if(result)
662 return result;
663
664 /* Concatenate the HMAC MD5 output with the client nonce */
665 memcpy(lmresp, hmac_output, 16);
666 memcpy(lmresp + 16, challenge_client, 8);
667
668 return result;
669 }
670
671 #endif /* !USE_WINDOWS_SSPI */
672
673 #endif /* USE_CURL_NTLM_CORE */
674
