1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2022, Daniel Stenberg, <[email protected]>, 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.io/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_GNUTLS
40 3. USE_NSS
41 4. USE_MBEDTLS
42 5. USE_SECTRANSP
43 6. USE_OS400CRYPTO
44 7. USE_WIN32_CRYPTO
45
46 This ensures that:
47 - the same SSL branch gets activated throughout this source
48 file even if multiple backends are enabled at the same time.
49 - OpenSSL and NSS have higher priority than Windows Crypt, due
50 to issues with the latter supporting NTLM2Session responses
51 in NTLM type-3 messages.
52 */
53
54#if defined(USE_OPENSSL)
55 #include <openssl/opensslconf.h>
56 #if !defined(OPENSSL_NO_DES) && !defined(OPENSSL_NO_DEPRECATED_3_0)
57 #define USE_OPENSSL_DES
58 #endif
59#endif
60
61#if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
62
63#if defined(USE_OPENSSL)
64# include <openssl/des.h>
65# include <openssl/md5.h>
66# include <openssl/ssl.h>
67# include <openssl/rand.h>
68#else
69# include <wolfssl/options.h>
70# include <wolfssl/openssl/des.h>
71# include <wolfssl/openssl/md5.h>
72# include <wolfssl/openssl/ssl.h>
73# include <wolfssl/openssl/rand.h>
74#endif
75
76# if (defined(OPENSSL_VERSION_NUMBER) && \
77 (OPENSSL_VERSION_NUMBER < 0x00907001L)) && !defined(USE_WOLFSSL)
78# define DES_key_schedule des_key_schedule
79# define DES_cblock des_cblock
80# define DES_set_odd_parity des_set_odd_parity
81# define DES_set_key des_set_key
82# define DES_ecb_encrypt des_ecb_encrypt
83# define DESKEY(x) x
84# define DESKEYARG(x) x
85# else
86# define DESKEYARG(x) *x
87# define DESKEY(x) &x
88# endif
89
90#elif defined(USE_GNUTLS)
91
92# include <nettle/des.h>
93
94#elif defined(USE_NSS)
95
96# include <nss.h>
97# include <pk11pub.h>
98# include <hasht.h>
99
100#elif defined(USE_MBEDTLS)
101
102# include <mbedtls/des.h>
103
104#elif defined(USE_SECTRANSP)
105
106# include <CommonCrypto/CommonCryptor.h>
107# include <CommonCrypto/CommonDigest.h>
108
109#elif defined(USE_OS400CRYPTO)
110# include "cipher.mih" /* mih/cipher */
111#elif defined(USE_WIN32_CRYPTO)
112# include <wincrypt.h>
113#else
114# error "Can't compile NTLM support without a crypto library with DES."
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/*
135* Turns a 56-bit key into being 64-bit wide.
136*/
137static void extend_key_56_to_64(const unsigned char *key_56, char *key)
138{
139 key[0] = key_56[0];
140 key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
141 key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
142 key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
143 key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
144 key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
145 key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
146 key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
147}
148
149#if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
150/*
151 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The
152 * key schedule ks is also set.
153 */
154static void setup_des_key(const unsigned char *key_56,
155 DES_key_schedule DESKEYARG(ks))
156{
157 DES_cblock key;
158
159 /* Expand the 56-bit key to 64-bits */
160 extend_key_56_to_64(key_56, (char *) &key);
161
162 /* Set the key parity to odd */
163 DES_set_odd_parity(&key);
164
165 /* Set the key */
166 DES_set_key_unchecked(&key, ks);
167}
168
169#elif defined(USE_GNUTLS)
170
171static void setup_des_key(const unsigned char *key_56,
172 struct des_ctx *des)
173{
174 char key[8];
175
176 /* Expand the 56-bit key to 64-bits */
177 extend_key_56_to_64(key_56, key);
178
179 /* Set the key parity to odd */
180 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
181
182 /* Set the key */
183 des_set_key(des, (const uint8_t *) key);
184}
185
186#elif defined(USE_NSS)
187
188/*
189 * Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using
190 * the expanded key. The caller is responsible for giving 64 bit of valid
191 * data is IN and (at least) 64 bit large buffer as OUT.
192 */
193static bool encrypt_des(const unsigned char *in, unsigned char *out,
194 const unsigned char *key_56)
195{
196 const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */
197 char key[8]; /* expanded 64 bit key */
198 SECItem key_item;
199 PK11SymKey *symkey = NULL;
200 SECItem *param = NULL;
201 PK11Context *ctx = NULL;
202 int out_len; /* not used, required by NSS */
203 bool rv = FALSE;
204
205 /* use internal slot for DES encryption (requires NSS to be initialized) */
206 PK11SlotInfo *slot = PK11_GetInternalKeySlot();
207 if(!slot)
208 return FALSE;
209
210 /* Expand the 56-bit key to 64-bits */
211 extend_key_56_to_64(key_56, key);
212
213 /* Set the key parity to odd */
214 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
215
216 /* Import the key */
217 key_item.data = (unsigned char *)key;
218 key_item.len = sizeof(key);
219 symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT,
220 &key_item, NULL);
221 if(!symkey)
222 goto fail;
223
224 /* Create the DES encryption context */
225 param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL);
226 if(!param)
227 goto fail;
228 ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param);
229 if(!ctx)
230 goto fail;
231
232 /* Perform the encryption */
233 if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8,
234 (unsigned char *)in, /* inbuflen */ 8)
235 && SECSuccess == PK11_Finalize(ctx))
236 rv = /* all OK */ TRUE;
237
238fail:
239 /* cleanup */
240 if(ctx)
241 PK11_DestroyContext(ctx, PR_TRUE);
242 if(symkey)
243 PK11_FreeSymKey(symkey);
244 if(param)
245 SECITEM_FreeItem(param, PR_TRUE);
246 PK11_FreeSlot(slot);
247 return rv;
248}
249
250#elif defined(USE_MBEDTLS)
251
252static bool encrypt_des(const unsigned char *in, unsigned char *out,
253 const unsigned char *key_56)
254{
255 mbedtls_des_context ctx;
256 char key[8];
257
258 /* Expand the 56-bit key to 64-bits */
259 extend_key_56_to_64(key_56, key);
260
261 /* Set the key parity to odd */
262 mbedtls_des_key_set_parity((unsigned char *) key);
263
264 /* Perform the encryption */
265 mbedtls_des_init(&ctx);
266 mbedtls_des_setkey_enc(&ctx, (unsigned char *) key);
267 return mbedtls_des_crypt_ecb(&ctx, in, out) == 0;
268}
269
270#elif defined(USE_SECTRANSP)
271
272static bool encrypt_des(const unsigned char *in, unsigned char *out,
273 const unsigned char *key_56)
274{
275 char key[8];
276 size_t out_len;
277 CCCryptorStatus err;
278
279 /* Expand the 56-bit key to 64-bits */
280 extend_key_56_to_64(key_56, key);
281
282 /* Set the key parity to odd */
283 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
284
285 /* Perform the encryption */
286 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
287 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
288 8 /* outbuflen */, &out_len);
289
290 return err == kCCSuccess;
291}
292
293#elif defined(USE_OS400CRYPTO)
294
295static bool encrypt_des(const unsigned char *in, unsigned char *out,
296 const unsigned char *key_56)
297{
298 char key[8];
299 _CIPHER_Control_T ctl;
300
301 /* Setup the cipher control structure */
302 ctl.Func_ID = ENCRYPT_ONLY;
303 ctl.Data_Len = sizeof(key);
304
305 /* Expand the 56-bit key to 64-bits */
306 extend_key_56_to_64(key_56, ctl.Crypto_Key);
307
308 /* Set the key parity to odd */
309 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
310
311 /* Perform the encryption */
312 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
313
314 return TRUE;
315}
316
317#elif defined(USE_WIN32_CRYPTO)
318
319static bool encrypt_des(const unsigned char *in, unsigned char *out,
320 const unsigned char *key_56)
321{
322 HCRYPTPROV hprov;
323 HCRYPTKEY hkey;
324 struct {
325 BLOBHEADER hdr;
326 unsigned int len;
327 char key[8];
328 } blob;
329 DWORD len = 8;
330
331 /* Acquire the crypto provider */
332 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
333 CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
334 return FALSE;
335
336 /* Setup the key blob structure */
337 memset(&blob, 0, sizeof(blob));
338 blob.hdr.bType = PLAINTEXTKEYBLOB;
339 blob.hdr.bVersion = 2;
340 blob.hdr.aiKeyAlg = CALG_DES;
341 blob.len = sizeof(blob.key);
342
343 /* Expand the 56-bit key to 64-bits */
344 extend_key_56_to_64(key_56, blob.key);
345
346 /* Set the key parity to odd */
347 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
348
349 /* Import the key */
350 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
351 CryptReleaseContext(hprov, 0);
352
353 return FALSE;
354 }
355
356 memcpy(out, in, 8);
357
358 /* Perform the encryption */
359 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
360
361 CryptDestroyKey(hkey);
362 CryptReleaseContext(hprov, 0);
363
364 return TRUE;
365}
366
367#endif /* defined(USE_WIN32_CRYPTO) */
368
369 /*
370 * takes a 21 byte array and treats it as 3 56-bit DES keys. The
371 * 8 byte plaintext is encrypted with each key and the resulting 24
372 * bytes are stored in the results array.
373 */
374void Curl_ntlm_core_lm_resp(const unsigned char *keys,
375 const unsigned char *plaintext,
376 unsigned char *results)
377{
378#if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
379 DES_key_schedule ks;
380
381 setup_des_key(keys, DESKEY(ks));
382 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
383 DESKEY(ks), DES_ENCRYPT);
384
385 setup_des_key(keys + 7, DESKEY(ks));
386 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
387 DESKEY(ks), DES_ENCRYPT);
388
389 setup_des_key(keys + 14, DESKEY(ks));
390 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
391 DESKEY(ks), DES_ENCRYPT);
392#elif defined(USE_GNUTLS)
393 struct des_ctx des;
394 setup_des_key(keys, &des);
395 des_encrypt(&des, 8, results, plaintext);
396 setup_des_key(keys + 7, &des);
397 des_encrypt(&des, 8, results + 8, plaintext);
398 setup_des_key(keys + 14, &des);
399 des_encrypt(&des, 8, results + 16, plaintext);
400#elif defined(USE_NSS) || defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
401 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
402 encrypt_des(plaintext, results, keys);
403 encrypt_des(plaintext, results + 8, keys + 7);
404 encrypt_des(plaintext, results + 16, keys + 14);
405#endif
406}
407
408/*
409 * Set up lanmanager hashed password
410 */
411CURLcode Curl_ntlm_core_mk_lm_hash(const char *password,
412 unsigned char *lmbuffer /* 21 bytes */)
413{
414 unsigned char pw[14];
415 static const unsigned char magic[] = {
416 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
417 };
418 size_t len = CURLMIN(strlen(password), 14);
419
420 Curl_strntoupper((char *)pw, password, len);
421 memset(&pw[len], 0, 14 - len);
422
423 {
424 /* Create LanManager hashed password. */
425
426#if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL)
427 DES_key_schedule ks;
428
429 setup_des_key(pw, DESKEY(ks));
430 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
431 DESKEY(ks), DES_ENCRYPT);
432
433 setup_des_key(pw + 7, DESKEY(ks));
434 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
435 DESKEY(ks), DES_ENCRYPT);
436#elif defined(USE_GNUTLS)
437 struct des_ctx des;
438 setup_des_key(pw, &des);
439 des_encrypt(&des, 8, lmbuffer, magic);
440 setup_des_key(pw + 7, &des);
441 des_encrypt(&des, 8, lmbuffer + 8, magic);
442#elif defined(USE_NSS) || defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
443 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
444 encrypt_des(magic, lmbuffer, pw);
445 encrypt_des(magic, lmbuffer + 8, pw + 7);
446#endif
447
448 memset(lmbuffer + 16, 0, 21 - 16);
449 }
450
451 return CURLE_OK;
452}
453
454static void ascii_to_unicode_le(unsigned char *dest, const char *src,
455 size_t srclen)
456{
457 size_t i;
458 for(i = 0; i < srclen; i++) {
459 dest[2 * i] = (unsigned char)src[i];
460 dest[2 * i + 1] = '\0';
461 }
462}
463
464#if !defined(USE_WINDOWS_SSPI)
465
466static void ascii_uppercase_to_unicode_le(unsigned char *dest,
467 const char *src, size_t srclen)
468{
469 size_t i;
470 for(i = 0; i < srclen; i++) {
471 dest[2 * i] = (unsigned char)(Curl_raw_toupper(src[i]));
472 dest[2 * i + 1] = '\0';
473 }
474}
475
476#endif /* !USE_WINDOWS_SSPI */
477
478/*
479 * Set up nt hashed passwords
480 * @unittest: 1600
481 */
482CURLcode Curl_ntlm_core_mk_nt_hash(const char *password,
483 unsigned char *ntbuffer /* 21 bytes */)
484{
485 size_t len = strlen(password);
486 unsigned char *pw;
487 if(len > SIZE_T_MAX/2) /* avoid integer overflow */
488 return CURLE_OUT_OF_MEMORY;
489 pw = len ? malloc(len * 2) : (unsigned char *)strdup("");
490 if(!pw)
491 return CURLE_OUT_OF_MEMORY;
492
493 ascii_to_unicode_le(pw, password, len);
494
495 /* Create NT hashed password. */
496 Curl_md4it(ntbuffer, pw, 2 * len);
497 memset(ntbuffer + 16, 0, 21 - 16);
498
499 free(pw);
500
501 return CURLE_OK;
502}
503
504#if !defined(USE_WINDOWS_SSPI)
505
506/* Timestamp in tenths of a microsecond since January 1, 1601 00:00:00 UTC. */
507struct ms_filetime {
508 unsigned int dwLowDateTime;
509 unsigned int dwHighDateTime;
510};
511
512/* Convert a time_t to an MS FILETIME (MS-DTYP section 2.3.3). */
513static void time2filetime(struct ms_filetime *ft, time_t t)
514{
515#if SIZEOF_TIME_T > 4
516 t = (t + CURL_OFF_T_C(11644473600)) * 10000000;
517 ft->dwLowDateTime = (unsigned int) (t & 0xFFFFFFFF);
518 ft->dwHighDateTime = (unsigned int) (t >> 32);
519#else
520 unsigned int r, s;
521 unsigned int i;
522
523 ft->dwLowDateTime = t & 0xFFFFFFFF;
524 ft->dwHighDateTime = 0;
525
526# ifndef HAVE_TIME_T_UNSIGNED
527 /* Extend sign if needed. */
528 if(ft->dwLowDateTime & 0x80000000)
529 ft->dwHighDateTime = ~0;
530# endif
531
532 /* Bias seconds to Jan 1, 1601.
533 134774 days = 11644473600 seconds = 0x2B6109100 */
534 r = ft->dwLowDateTime;
535 ft->dwLowDateTime = (ft->dwLowDateTime + 0xB6109100U) & 0xFFFFFFFF;
536 ft->dwHighDateTime += ft->dwLowDateTime < r? 0x03: 0x02;
537
538 /* Convert to tenths of microseconds. */
539 ft->dwHighDateTime *= 10000000;
540 i = 32;
541 do {
542 i -= 8;
543 s = ((ft->dwLowDateTime >> i) & 0xFF) * (10000000 - 1);
544 r = (s << i) & 0xFFFFFFFF;
545 s >>= 1; /* Split shift to avoid width overflow. */
546 s >>= 31 - i;
547 ft->dwLowDateTime = (ft->dwLowDateTime + r) & 0xFFFFFFFF;
548 if(ft->dwLowDateTime < r)
549 s++;
550 ft->dwHighDateTime += s;
551 } while(i);
552 ft->dwHighDateTime &= 0xFFFFFFFF;
553#endif
554}
555
556/* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
557 * (uppercase UserName + Domain) as the data
558 */
559CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
560 const char *domain, size_t domlen,
561 unsigned char *ntlmhash,
562 unsigned char *ntlmv2hash)
563{
564 /* Unicode representation */
565 size_t identity_len;
566 unsigned char *identity;
567 CURLcode result = CURLE_OK;
568
569 if((userlen > CURL_MAX_INPUT_LENGTH) || (domlen > CURL_MAX_INPUT_LENGTH))
570 return CURLE_OUT_OF_MEMORY;
571
572 identity_len = (userlen + domlen) * 2;
573 identity = malloc(identity_len + 1);
574
575 if(!identity)
576 return CURLE_OUT_OF_MEMORY;
577
578 ascii_uppercase_to_unicode_le(identity, user, userlen);
579 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
580
581 result = Curl_hmacit(Curl_HMAC_MD5, ntlmhash, 16, identity, identity_len,
582 ntlmv2hash);
583 free(identity);
584
585 return result;
586}
587
588/*
589 * Curl_ntlm_core_mk_ntlmv2_resp()
590 *
591 * This creates the NTLMv2 response as set in the ntlm type-3 message.
592 *
593 * Parameters:
594 *
595 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
596 * challenge_client [in] - The client nonce (8 bytes)
597 * ntlm [in] - The ntlm data struct being used to read TargetInfo
598 and Server challenge received in the type-2 message
599 * ntresp [out] - The address where a pointer to newly allocated
600 * memory holding the NTLMv2 response.
601 * ntresp_len [out] - The length of the output message.
602 *
603 * Returns CURLE_OK on success.
604 */
605CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
606 unsigned char *challenge_client,
607 struct ntlmdata *ntlm,
608 unsigned char **ntresp,
609 unsigned int *ntresp_len)
610{
611/* NTLMv2 response structure :
612------------------------------------------------------------------------------
6130 HMAC MD5 16 bytes
614------BLOB--------------------------------------------------------------------
61516 Signature 0x01010000
61620 Reserved long (0x00000000)
61724 Timestamp LE, 64-bit signed value representing the number of
618 tenths of a microsecond since January 1, 1601.
61932 Client Nonce 8 bytes
62040 Unknown 4 bytes
62144 Target Info N bytes (from the type-2 message)
62244+N Unknown 4 bytes
623------------------------------------------------------------------------------
624*/
625
626 unsigned int len = 0;
627 unsigned char *ptr = NULL;
628 unsigned char hmac_output[HMAC_MD5_LENGTH];
629 struct ms_filetime tw;
630
631 CURLcode result = CURLE_OK;
632
633 /* Calculate the timestamp */
634#ifdef DEBUGBUILD
635 char *force_timestamp = getenv("CURL_FORCETIME");
636 if(force_timestamp)
637 time2filetime(&tw, (time_t) 0);
638 else
639#endif
640 time2filetime(&tw, time(NULL));
641
642 /* Calculate the response len */
643 len = HMAC_MD5_LENGTH + NTLMv2_BLOB_LEN;
644
645 /* Allocate the response */
646 ptr = calloc(1, len);
647 if(!ptr)
648 return CURLE_OUT_OF_MEMORY;
649
650 /* Create the BLOB structure */
651 msnprintf((char *)ptr + HMAC_MD5_LENGTH, NTLMv2_BLOB_LEN,
652 "%c%c%c%c" /* NTLMv2_BLOB_SIGNATURE */
653 "%c%c%c%c" /* Reserved = 0 */
654 "%c%c%c%c%c%c%c%c", /* Timestamp */
655 NTLMv2_BLOB_SIGNATURE[0], NTLMv2_BLOB_SIGNATURE[1],
656 NTLMv2_BLOB_SIGNATURE[2], NTLMv2_BLOB_SIGNATURE[3],
657 0, 0, 0, 0,
658 LONGQUARTET(tw.dwLowDateTime), LONGQUARTET(tw.dwHighDateTime));
659
660 memcpy(ptr + 32, challenge_client, 8);
661 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
662
663 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
664 memcpy(ptr + 8, &ntlm->nonce[0], 8);
665 result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, HMAC_MD5_LENGTH, ptr + 8,
666 NTLMv2_BLOB_LEN + 8, hmac_output);
667 if(result) {
668 free(ptr);
669 return result;
670 }
671
672 /* Concatenate the HMAC MD5 output with the BLOB */
673 memcpy(ptr, hmac_output, HMAC_MD5_LENGTH);
674
675 /* Return the response */
676 *ntresp = ptr;
677 *ntresp_len = len;
678
679 return result;
680}
681
682/*
683 * Curl_ntlm_core_mk_lmv2_resp()
684 *
685 * This creates the LMv2 response as used in the ntlm type-3 message.
686 *
687 * Parameters:
688 *
689 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
690 * challenge_client [in] - The client nonce (8 bytes)
691 * challenge_client [in] - The server challenge (8 bytes)
692 * lmresp [out] - The LMv2 response (24 bytes)
693 *
694 * Returns CURLE_OK on success.
695 */
696CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
697 unsigned char *challenge_client,
698 unsigned char *challenge_server,
699 unsigned char *lmresp)
700{
701 unsigned char data[16];
702 unsigned char hmac_output[16];
703 CURLcode result = CURLE_OK;
704
705 memcpy(&data[0], challenge_server, 8);
706 memcpy(&data[8], challenge_client, 8);
707
708 result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, 16, &data[0], 16,
709 hmac_output);
710 if(result)
711 return result;
712
713 /* Concatenate the HMAC MD5 output with the client nonce */
714 memcpy(lmresp, hmac_output, 16);
715 memcpy(lmresp + 16, challenge_client, 8);
716
717 return result;
718}
719
720#endif /* !USE_WINDOWS_SSPI */
721
722#endif /* USE_CURL_NTLM_CORE */
723