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 # if (defined(OPENSSL_VERSION_NUMBER) && \
75 (OPENSSL_VERSION_NUMBER < 0x00907001L)) && !defined(USE_WOLFSSL)
76 # define DES_key_schedule des_key_schedule
77 # define DES_cblock des_cblock
78 # define DES_set_odd_parity des_set_odd_parity
79 # define DES_set_key des_set_key
80 # define DES_ecb_encrypt des_ecb_encrypt
81 # define DESKEY(x) x
82 # define DESKEYARG(x) x
83 # elif defined(OPENSSL_IS_AWSLC)
84 # define DES_set_key_unchecked (void)DES_set_key
85 # define DESKEYARG(x) *x
86 # define DESKEY(x) &x
87 # else
88 # define DESKEYARG(x) *x
89 # define DESKEY(x) &x
90 # endif
91 #else
92 # include <wolfssl/openssl/des.h>
93 # include <wolfssl/openssl/md5.h>
94 # include <wolfssl/openssl/ssl.h>
95 # include <wolfssl/openssl/rand.h>
96 # if defined(OPENSSL_COEXIST)
97 # define DES_key_schedule WOLFSSL_DES_key_schedule
98 # define DES_cblock WOLFSSL_DES_cblock
99 # define DES_set_odd_parity wolfSSL_DES_set_odd_parity
100 # define DES_set_key wolfSSL_DES_set_key
101 # define DES_set_key_unchecked wolfSSL_DES_set_key_unchecked
102 # define DES_ecb_encrypt wolfSSL_DES_ecb_encrypt
103 # define DESKEY(x) ((WOLFSSL_DES_key_schedule *)(x))
104 # define DESKEYARG(x) *x
105 # else
106 # define DESKEYARG(x) *x
107 # define DESKEY(x) &x
108 # endif
109 #endif
110
111 #elif defined(USE_GNUTLS)
112
113 # include <nettle/des.h>
114
115 #elif defined(USE_MBEDTLS)
116
117 # include <mbedtls/des.h>
118
119 #elif defined(USE_SECTRANSP)
120
121 # include <CommonCrypto/CommonCryptor.h>
122 # include <CommonCrypto/CommonDigest.h>
123
124 #elif defined(USE_OS400CRYPTO)
125 # include "cipher.mih" /* mih/cipher */
126 #elif defined(USE_WIN32_CRYPTO)
127 # include <wincrypt.h>
128 #else
129 # error "cannot compile NTLM support without a crypto library with DES."
130 # define CURL_NTLM_NOT_SUPPORTED
131 #endif
132
133 #include "urldata.h"
134 #include "strcase.h"
135 #include "curl_ntlm_core.h"
136 #include "curl_md5.h"
137 #include "curl_hmac.h"
138 #include "warnless.h"
139 #include "curl_endian.h"
140 #include "curl_des.h"
141 #include "curl_md4.h"
142 /* The last 3 #include files should be in this order */
143 #include "curl_printf.h"
144 #include "curl_memory.h"
145 #include "memdebug.h"
146
147 #define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00"
148 #define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4)
149
150 #if !defined(CURL_NTLM_NOT_SUPPORTED)
151 /*
152 * Turns a 56-bit key into being 64-bit wide.
153 */
extend_key_56_to_64(const unsigned char * key_56,char * key)154 static void extend_key_56_to_64(const unsigned char *key_56, char *key)
155 {
156 key[0] = (char)key_56[0];
157 key[1] = (char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
158 key[2] = (char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
159 key[3] = (char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
160 key[4] = (char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
161 key[5] = (char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
162 key[6] = (char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
163 key[7] = (char) ((key_56[6] << 1) & 0xFF);
164 }
165 #endif
166
167 #if defined(USE_OPENSSL_DES)
168 /*
169 * Turns a 56-bit key into a 64-bit, odd parity key and sets the key. The
170 * key schedule ks is also set.
171 */
setup_des_key(const unsigned char * key_56,DES_key_schedule DESKEYARG (ks))172 static void setup_des_key(const unsigned char *key_56,
173 DES_key_schedule DESKEYARG(ks))
174 {
175 DES_cblock key;
176
177 /* Expand the 56-bit key to 64 bits */
178 extend_key_56_to_64(key_56, (char *) &key);
179
180 /* Set the key parity to odd */
181 DES_set_odd_parity(&key);
182
183 /* Set the key */
184 DES_set_key_unchecked(&key, ks);
185 }
186
187 #elif defined(USE_GNUTLS)
188
setup_des_key(const unsigned char * key_56,struct des_ctx * des)189 static void setup_des_key(const unsigned char *key_56,
190 struct des_ctx *des)
191 {
192 char key[8];
193
194 /* Expand the 56-bit key to 64 bits */
195 extend_key_56_to_64(key_56, key);
196
197 /* Set the key parity to odd */
198 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
199
200 /* Set the key */
201 des_set_key(des, (const uint8_t *) key);
202 }
203
204 #elif defined(USE_MBEDTLS)
205
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)206 static bool encrypt_des(const unsigned char *in, unsigned char *out,
207 const unsigned char *key_56)
208 {
209 mbedtls_des_context ctx;
210 char key[8];
211
212 /* Expand the 56-bit key to 64 bits */
213 extend_key_56_to_64(key_56, key);
214
215 /* Set the key parity to odd */
216 mbedtls_des_key_set_parity((unsigned char *) key);
217
218 /* Perform the encryption */
219 mbedtls_des_init(&ctx);
220 mbedtls_des_setkey_enc(&ctx, (unsigned char *) key);
221 return mbedtls_des_crypt_ecb(&ctx, in, out) == 0;
222 }
223
224 #elif defined(USE_SECTRANSP)
225
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)226 static bool encrypt_des(const unsigned char *in, unsigned char *out,
227 const unsigned char *key_56)
228 {
229 char key[8];
230 size_t out_len;
231 CCCryptorStatus err;
232
233 /* Expand the 56-bit key to 64 bits */
234 extend_key_56_to_64(key_56, key);
235
236 /* Set the key parity to odd */
237 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
238
239 /* Perform the encryption */
240 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
241 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
242 8 /* outbuflen */, &out_len);
243
244 return err == kCCSuccess;
245 }
246
247 #elif defined(USE_OS400CRYPTO)
248
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)249 static bool encrypt_des(const unsigned char *in, unsigned char *out,
250 const unsigned char *key_56)
251 {
252 char key[8];
253 _CIPHER_Control_T ctl;
254
255 /* Setup the cipher control structure */
256 ctl.Func_ID = ENCRYPT_ONLY;
257 ctl.Data_Len = sizeof(key);
258
259 /* Expand the 56-bit key to 64 bits */
260 extend_key_56_to_64(key_56, ctl.Crypto_Key);
261
262 /* Set the key parity to odd */
263 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
264
265 /* Perform the encryption */
266 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
267
268 return TRUE;
269 }
270
271 #elif defined(USE_WIN32_CRYPTO)
272
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)273 static bool encrypt_des(const unsigned char *in, unsigned char *out,
274 const unsigned char *key_56)
275 {
276 HCRYPTPROV hprov;
277 HCRYPTKEY hkey;
278 struct {
279 BLOBHEADER hdr;
280 unsigned int len;
281 char key[8];
282 } blob;
283 DWORD len = 8;
284
285 /* Acquire the crypto provider */
286 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
287 CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
288 return FALSE;
289
290 /* Setup the key blob structure */
291 memset(&blob, 0, sizeof(blob));
292 blob.hdr.bType = PLAINTEXTKEYBLOB;
293 blob.hdr.bVersion = 2;
294 blob.hdr.aiKeyAlg = CALG_DES;
295 blob.len = sizeof(blob.key);
296
297 /* Expand the 56-bit key to 64 bits */
298 extend_key_56_to_64(key_56, blob.key);
299
300 /* Set the key parity to odd */
301 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
302
303 /* Import the key */
304 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
305 CryptReleaseContext(hprov, 0);
306
307 return FALSE;
308 }
309
310 memcpy(out, in, 8);
311
312 /* Perform the encryption */
313 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
314
315 CryptDestroyKey(hkey);
316 CryptReleaseContext(hprov, 0);
317
318 return TRUE;
319 }
320
321 #endif /* defined(USE_WIN32_CRYPTO) */
322
323 /*
324 * takes a 21 byte array and treats it as 3 56-bit DES keys. The
325 * 8 byte plaintext is encrypted with each key and the resulting 24
326 * bytes are stored in the results array.
327 */
Curl_ntlm_core_lm_resp(const unsigned char * keys,const unsigned char * plaintext,unsigned char * results)328 void Curl_ntlm_core_lm_resp(const unsigned char *keys,
329 const unsigned char *plaintext,
330 unsigned char *results)
331 {
332 #if defined(USE_OPENSSL_DES)
333 DES_key_schedule ks;
334
335 setup_des_key(keys, DESKEY(ks));
336 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
337 DESKEY(ks), DES_ENCRYPT);
338
339 setup_des_key(keys + 7, DESKEY(ks));
340 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
341 DESKEY(ks), DES_ENCRYPT);
342
343 setup_des_key(keys + 14, DESKEY(ks));
344 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
345 DESKEY(ks), DES_ENCRYPT);
346 #elif defined(USE_GNUTLS)
347 struct des_ctx des;
348 setup_des_key(keys, &des);
349 des_encrypt(&des, 8, results, plaintext);
350 setup_des_key(keys + 7, &des);
351 des_encrypt(&des, 8, results + 8, plaintext);
352 setup_des_key(keys + 14, &des);
353 des_encrypt(&des, 8, results + 16, plaintext);
354 #elif defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
355 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
356 encrypt_des(plaintext, results, keys);
357 encrypt_des(plaintext, results + 8, keys + 7);
358 encrypt_des(plaintext, results + 16, keys + 14);
359 #else
360 (void)keys;
361 (void)plaintext;
362 (void)results;
363 #endif
364 }
365
366 /*
367 * Set up lanmanager hashed password
368 */
Curl_ntlm_core_mk_lm_hash(const char * password,unsigned char * lmbuffer)369 CURLcode Curl_ntlm_core_mk_lm_hash(const char *password,
370 unsigned char *lmbuffer /* 21 bytes */)
371 {
372 unsigned char pw[14];
373 #if !defined(CURL_NTLM_NOT_SUPPORTED)
374 static const unsigned char magic[] = {
375 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
376 };
377 #endif
378 size_t len = CURLMIN(strlen(password), 14);
379
380 Curl_strntoupper((char *)pw, password, len);
381 memset(&pw[len], 0, 14 - len);
382
383 {
384 /* Create LanManager hashed password. */
385
386 #if defined(USE_OPENSSL_DES)
387 DES_key_schedule ks;
388
389 setup_des_key(pw, DESKEY(ks));
390 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
391 DESKEY(ks), DES_ENCRYPT);
392
393 setup_des_key(pw + 7, DESKEY(ks));
394 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
395 DESKEY(ks), DES_ENCRYPT);
396 #elif defined(USE_GNUTLS)
397 struct des_ctx des;
398 setup_des_key(pw, &des);
399 des_encrypt(&des, 8, lmbuffer, magic);
400 setup_des_key(pw + 7, &des);
401 des_encrypt(&des, 8, lmbuffer + 8, magic);
402 #elif defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
403 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
404 encrypt_des(magic, lmbuffer, pw);
405 encrypt_des(magic, lmbuffer + 8, pw + 7);
406 #endif
407
408 memset(lmbuffer + 16, 0, 21 - 16);
409 }
410
411 return CURLE_OK;
412 }
413
ascii_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)414 static void ascii_to_unicode_le(unsigned char *dest, const char *src,
415 size_t srclen)
416 {
417 size_t i;
418 for(i = 0; i < srclen; i++) {
419 dest[2 * i] = (unsigned char)src[i];
420 dest[2 * i + 1] = '\0';
421 }
422 }
423
424 #if !defined(USE_WINDOWS_SSPI)
425
ascii_uppercase_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)426 static void ascii_uppercase_to_unicode_le(unsigned char *dest,
427 const char *src, size_t srclen)
428 {
429 size_t i;
430 for(i = 0; i < srclen; i++) {
431 dest[2 * i] = (unsigned char)(Curl_raw_toupper(src[i]));
432 dest[2 * i + 1] = '\0';
433 }
434 }
435
436 #endif /* !USE_WINDOWS_SSPI */
437
438 /*
439 * Set up nt hashed passwords
440 * @unittest: 1600
441 */
Curl_ntlm_core_mk_nt_hash(const char * password,unsigned char * ntbuffer)442 CURLcode Curl_ntlm_core_mk_nt_hash(const char *password,
443 unsigned char *ntbuffer /* 21 bytes */)
444 {
445 size_t len = strlen(password);
446 unsigned char *pw;
447 CURLcode result;
448 if(len > SIZE_T_MAX/2) /* avoid integer overflow */
449 return CURLE_OUT_OF_MEMORY;
450 pw = len ? malloc(len * 2) : (unsigned char *)strdup("");
451 if(!pw)
452 return CURLE_OUT_OF_MEMORY;
453
454 ascii_to_unicode_le(pw, password, len);
455
456 /* Create NT hashed password. */
457 result = Curl_md4it(ntbuffer, pw, 2 * len);
458 if(!result)
459 memset(ntbuffer + 16, 0, 21 - 16);
460
461 free(pw);
462
463 return result;
464 }
465
466 #if !defined(USE_WINDOWS_SSPI)
467
468 /* Timestamp in tenths of a microsecond since January 1, 1601 00:00:00 UTC. */
469 struct ms_filetime {
470 unsigned int dwLowDateTime;
471 unsigned int dwHighDateTime;
472 };
473
474 /* Convert a time_t to an MS FILETIME (MS-DTYP section 2.3.3). */
time2filetime(struct ms_filetime * ft,time_t t)475 static void time2filetime(struct ms_filetime *ft, time_t t)
476 {
477 #if SIZEOF_TIME_T > 4
478 t = (t + CURL_OFF_T_C(11644473600)) * 10000000;
479 ft->dwLowDateTime = (unsigned int) (t & 0xFFFFFFFF);
480 ft->dwHighDateTime = (unsigned int) (t >> 32);
481 #else
482 unsigned int r, s;
483 unsigned int i;
484
485 ft->dwLowDateTime = (unsigned int)t & 0xFFFFFFFF;
486 ft->dwHighDateTime = 0;
487
488 # ifndef HAVE_TIME_T_UNSIGNED
489 /* Extend sign if needed. */
490 if(ft->dwLowDateTime & 0x80000000)
491 ft->dwHighDateTime = ~(unsigned int)0;
492 # endif
493
494 /* Bias seconds to Jan 1, 1601.
495 134774 days = 11644473600 seconds = 0x2B6109100 */
496 r = ft->dwLowDateTime;
497 ft->dwLowDateTime = (ft->dwLowDateTime + 0xB6109100U) & 0xFFFFFFFF;
498 ft->dwHighDateTime += ft->dwLowDateTime < r ? 0x03 : 0x02;
499
500 /* Convert to tenths of microseconds. */
501 ft->dwHighDateTime *= 10000000;
502 i = 32;
503 do {
504 i -= 8;
505 s = ((ft->dwLowDateTime >> i) & 0xFF) * (10000000 - 1);
506 r = (s << i) & 0xFFFFFFFF;
507 s >>= 1; /* Split shift to avoid width overflow. */
508 s >>= 31 - i;
509 ft->dwLowDateTime = (ft->dwLowDateTime + r) & 0xFFFFFFFF;
510 if(ft->dwLowDateTime < r)
511 s++;
512 ft->dwHighDateTime += s;
513 } while(i);
514 ft->dwHighDateTime &= 0xFFFFFFFF;
515 #endif
516 }
517
518 /* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
519 * (uppercase UserName + Domain) as the data
520 */
Curl_ntlm_core_mk_ntlmv2_hash(const char * user,size_t userlen,const char * domain,size_t domlen,unsigned char * ntlmhash,unsigned char * ntlmv2hash)521 CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
522 const char *domain, size_t domlen,
523 unsigned char *ntlmhash,
524 unsigned char *ntlmv2hash)
525 {
526 /* Unicode representation */
527 size_t identity_len;
528 unsigned char *identity;
529 CURLcode result = CURLE_OK;
530
531 if((userlen > CURL_MAX_INPUT_LENGTH) || (domlen > CURL_MAX_INPUT_LENGTH))
532 return CURLE_OUT_OF_MEMORY;
533
534 identity_len = (userlen + domlen) * 2;
535 identity = malloc(identity_len + 1);
536
537 if(!identity)
538 return CURLE_OUT_OF_MEMORY;
539
540 ascii_uppercase_to_unicode_le(identity, user, userlen);
541 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
542
543 result = Curl_hmacit(&Curl_HMAC_MD5, ntlmhash, 16, identity, identity_len,
544 ntlmv2hash);
545 free(identity);
546
547 return result;
548 }
549
550 /*
551 * Curl_ntlm_core_mk_ntlmv2_resp()
552 *
553 * This creates the NTLMv2 response as set in the NTLM type-3 message.
554 *
555 * Parameters:
556 *
557 * ntlmv2hash [in] - The NTLMv2 hash (16 bytes)
558 * challenge_client [in] - The client nonce (8 bytes)
559 * ntlm [in] - The NTLM data struct being used to read TargetInfo
560 and Server challenge received in the type-2 message
561 * ntresp [out] - The address where a pointer to newly allocated
562 * memory holding the NTLMv2 response.
563 * ntresp_len [out] - The length of the output message.
564 *
565 * Returns CURLE_OK on success.
566 */
Curl_ntlm_core_mk_ntlmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,struct ntlmdata * ntlm,unsigned char ** ntresp,unsigned int * ntresp_len)567 CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
568 unsigned char *challenge_client,
569 struct ntlmdata *ntlm,
570 unsigned char **ntresp,
571 unsigned int *ntresp_len)
572 {
573 /* NTLMv2 response structure :
574 ------------------------------------------------------------------------------
575 0 HMAC MD5 16 bytes
576 ------BLOB--------------------------------------------------------------------
577 16 Signature 0x01010000
578 20 Reserved long (0x00000000)
579 24 Timestamp LE, 64-bit signed value representing the number of
580 tenths of a microsecond since January 1, 1601.
581 32 Client Nonce 8 bytes
582 40 Unknown 4 bytes
583 44 Target Info N bytes (from the type-2 message)
584 44+N Unknown 4 bytes
585 ------------------------------------------------------------------------------
586 */
587
588 unsigned int len = 0;
589 unsigned char *ptr = NULL;
590 unsigned char hmac_output[HMAC_MD5_LENGTH];
591 struct ms_filetime tw;
592
593 CURLcode result = CURLE_OK;
594
595 /* Calculate the timestamp */
596 #ifdef DEBUGBUILD
597 char *force_timestamp = getenv("CURL_FORCETIME");
598 if(force_timestamp)
599 time2filetime(&tw, (time_t) 0);
600 else
601 #endif
602 time2filetime(&tw, time(NULL));
603
604 /* Calculate the response len */
605 len = HMAC_MD5_LENGTH + NTLMv2_BLOB_LEN;
606
607 /* Allocate the response */
608 ptr = calloc(1, len);
609 if(!ptr)
610 return CURLE_OUT_OF_MEMORY;
611
612 /* Create the BLOB structure */
613 msnprintf((char *)ptr + HMAC_MD5_LENGTH, NTLMv2_BLOB_LEN,
614 "%c%c%c%c" /* NTLMv2_BLOB_SIGNATURE */
615 "%c%c%c%c" /* Reserved = 0 */
616 "%c%c%c%c%c%c%c%c", /* Timestamp */
617 NTLMv2_BLOB_SIGNATURE[0], NTLMv2_BLOB_SIGNATURE[1],
618 NTLMv2_BLOB_SIGNATURE[2], NTLMv2_BLOB_SIGNATURE[3],
619 0, 0, 0, 0,
620 LONGQUARTET(tw.dwLowDateTime), LONGQUARTET(tw.dwHighDateTime));
621
622 memcpy(ptr + 32, challenge_client, 8);
623 if(ntlm->target_info_len)
624 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
625
626 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
627 memcpy(ptr + 8, &ntlm->nonce[0], 8);
628 result = Curl_hmacit(&Curl_HMAC_MD5, ntlmv2hash, HMAC_MD5_LENGTH, ptr + 8,
629 NTLMv2_BLOB_LEN + 8, hmac_output);
630 if(result) {
631 free(ptr);
632 return result;
633 }
634
635 /* Concatenate the HMAC MD5 output with the BLOB */
636 memcpy(ptr, hmac_output, HMAC_MD5_LENGTH);
637
638 /* Return the response */
639 *ntresp = ptr;
640 *ntresp_len = len;
641
642 return result;
643 }
644
645 /*
646 * Curl_ntlm_core_mk_lmv2_resp()
647 *
648 * This creates the LMv2 response as used in the NTLM type-3 message.
649 *
650 * Parameters:
651 *
652 * ntlmv2hash [in] - The NTLMv2 hash (16 bytes)
653 * challenge_client [in] - The client nonce (8 bytes)
654 * challenge_client [in] - The server challenge (8 bytes)
655 * lmresp [out] - The LMv2 response (24 bytes)
656 *
657 * Returns CURLE_OK on success.
658 */
Curl_ntlm_core_mk_lmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,unsigned char * challenge_server,unsigned char * lmresp)659 CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
660 unsigned char *challenge_client,
661 unsigned char *challenge_server,
662 unsigned char *lmresp)
663 {
664 unsigned char data[16];
665 unsigned char hmac_output[16];
666 CURLcode result = CURLE_OK;
667
668 memcpy(&data[0], challenge_server, 8);
669 memcpy(&data[8], challenge_client, 8);
670
671 result = Curl_hmacit(&Curl_HMAC_MD5, ntlmv2hash, 16, &data[0], 16,
672 hmac_output);
673 if(result)
674 return result;
675
676 /* Concatenate the HMAC MD5 output with the client nonce */
677 memcpy(lmresp, hmac_output, 16);
678 memcpy(lmresp + 16, challenge_client, 8);
679
680 return result;
681 }
682
683 #endif /* !USE_WINDOWS_SSPI */
684
685 #endif /* USE_CURL_NTLM_CORE */
686