source: UsbWattMeter/trunk/curl-7.47.1/lib/curl_ntlm_core.c@ 164

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[164]1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, 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.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 * http://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#include "curl_printf.h"
111
112/* The last #include files should be: */
113#include "curl_memory.h"
114#include "memdebug.h"
115
116#define NTLM_HMAC_MD5_LEN (16)
117#define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00"
118#define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4)
119
120/*
121* Turns a 56-bit key into being 64-bit wide.
122*/
123static void extend_key_56_to_64(const unsigned char *key_56, char *key)
124{
125 key[0] = key_56[0];
126 key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
127 key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
128 key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
129 key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
130 key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
131 key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
132 key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
133}
134
135#ifdef USE_OPENSSL
136/*
137 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The
138 * key schedule ks is also set.
139 */
140static void setup_des_key(const unsigned char *key_56,
141 DES_key_schedule DESKEYARG(ks))
142{
143 DES_cblock key;
144
145 /* Expand the 56-bit key to 64-bits */
146 extend_key_56_to_64(key_56, (char *) key);
147
148 /* Set the key parity to odd */
149#ifndef HAVE_DES_SET_ODD_PARITY /* older boringssl */
150 Curl_des_set_odd_parity((unsigned char *) &key, sizeof(key));
151#else
152 DES_set_odd_parity(&key);
153#endif
154
155 /* Set the key */
156 DES_set_key(&key, ks);
157}
158
159#elif defined(USE_GNUTLS_NETTLE)
160
161static void setup_des_key(const unsigned char *key_56,
162 struct des_ctx *des)
163{
164 char key[8];
165
166 /* Expand the 56-bit key to 64-bits */
167 extend_key_56_to_64(key_56, key);
168
169 /* Set the key parity to odd */
170 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
171
172 /* Set the key */
173 des_set_key(des, (const uint8_t *) key);
174}
175
176#elif defined(USE_GNUTLS)
177
178/*
179 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key.
180 */
181static void setup_des_key(const unsigned char *key_56,
182 gcry_cipher_hd_t *des)
183{
184 char key[8];
185
186 /* Expand the 56-bit key to 64-bits */
187 extend_key_56_to_64(key_56, key);
188
189 /* Set the key parity to odd */
190 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
191
192 /* Set the key */
193 gcry_cipher_setkey(*des, key, sizeof(key));
194}
195
196#elif defined(USE_NSS)
197
198/*
199 * Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using
200 * the expanded key. The caller is responsible for giving 64 bit of valid
201 * data is IN and (at least) 64 bit large buffer as OUT.
202 */
203static bool encrypt_des(const unsigned char *in, unsigned char *out,
204 const unsigned char *key_56)
205{
206 const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */
207 PK11SlotInfo *slot = NULL;
208 char key[8]; /* expanded 64 bit key */
209 SECItem key_item;
210 PK11SymKey *symkey = NULL;
211 SECItem *param = NULL;
212 PK11Context *ctx = NULL;
213 int out_len; /* not used, required by NSS */
214 bool rv = FALSE;
215
216 /* use internal slot for DES encryption (requires NSS to be initialized) */
217 slot = PK11_GetInternalKeySlot();
218 if(!slot)
219 return FALSE;
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 /* Import the key */
228 key_item.data = (unsigned char *)key;
229 key_item.len = sizeof(key);
230 symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT,
231 &key_item, NULL);
232 if(!symkey)
233 goto fail;
234
235 /* Create the DES encryption context */
236 param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL);
237 if(!param)
238 goto fail;
239 ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param);
240 if(!ctx)
241 goto fail;
242
243 /* Perform the encryption */
244 if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8,
245 (unsigned char *)in, /* inbuflen */ 8)
246 && SECSuccess == PK11_Finalize(ctx))
247 rv = /* all OK */ TRUE;
248
249fail:
250 /* cleanup */
251 if(ctx)
252 PK11_DestroyContext(ctx, PR_TRUE);
253 if(symkey)
254 PK11_FreeSymKey(symkey);
255 if(param)
256 SECITEM_FreeItem(param, PR_TRUE);
257 PK11_FreeSlot(slot);
258 return rv;
259}
260
261#elif defined(USE_DARWINSSL)
262
263static bool encrypt_des(const unsigned char *in, unsigned char *out,
264 const unsigned char *key_56)
265{
266 char key[8];
267 size_t out_len;
268 CCCryptorStatus err;
269
270 /* Expand the 56-bit key to 64-bits */
271 extend_key_56_to_64(key_56, key);
272
273 /* Set the key parity to odd */
274 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
275
276 /* Perform the encryption */
277 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
278 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
279 8 /* outbuflen */, &out_len);
280
281 return err == kCCSuccess;
282}
283
284#elif defined(USE_OS400CRYPTO)
285
286static bool encrypt_des(const unsigned char *in, unsigned char *out,
287 const unsigned char *key_56)
288{
289 char key[8];
290 _CIPHER_Control_T ctl;
291
292 /* Setup the cipher control structure */
293 ctl.Func_ID = ENCRYPT_ONLY;
294 ctl.Data_Len = sizeof(key);
295
296 /* Expand the 56-bit key to 64-bits */
297 extend_key_56_to_64(key_56, ctl.Crypto_Key);
298
299 /* Set the key parity to odd */
300 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
301
302 /* Perform the encryption */
303 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
304
305 return TRUE;
306}
307
308#elif defined(USE_WIN32_CRYPTO)
309
310static bool encrypt_des(const unsigned char *in, unsigned char *out,
311 const unsigned char *key_56)
312{
313 HCRYPTPROV hprov;
314 HCRYPTKEY hkey;
315 struct {
316 BLOBHEADER hdr;
317 unsigned int len;
318 char key[8];
319 } blob;
320 DWORD len = 8;
321
322 /* Acquire the crypto provider */
323 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
324 CRYPT_VERIFYCONTEXT))
325 return FALSE;
326
327 /* Setup the key blob structure */
328 memset(&blob, 0, sizeof(blob));
329 blob.hdr.bType = PLAINTEXTKEYBLOB;
330 blob.hdr.bVersion = 2;
331 blob.hdr.aiKeyAlg = CALG_DES;
332 blob.len = sizeof(blob.key);
333
334 /* Expand the 56-bit key to 64-bits */
335 extend_key_56_to_64(key_56, blob.key);
336
337 /* Set the key parity to odd */
338 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
339
340 /* Import the key */
341 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
342 CryptReleaseContext(hprov, 0);
343
344 return FALSE;
345 }
346
347 memcpy(out, in, 8);
348
349 /* Perform the encryption */
350 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
351
352 CryptDestroyKey(hkey);
353 CryptReleaseContext(hprov, 0);
354
355 return TRUE;
356}
357
358#endif /* defined(USE_WIN32_CRYPTO) */
359
360 /*
361 * takes a 21 byte array and treats it as 3 56-bit DES keys. The
362 * 8 byte plaintext is encrypted with each key and the resulting 24
363 * bytes are stored in the results array.
364 */
365void Curl_ntlm_core_lm_resp(const unsigned char *keys,
366 const unsigned char *plaintext,
367 unsigned char *results)
368{
369#ifdef USE_OPENSSL
370 DES_key_schedule ks;
371
372 setup_des_key(keys, DESKEY(ks));
373 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
374 DESKEY(ks), DES_ENCRYPT);
375
376 setup_des_key(keys + 7, DESKEY(ks));
377 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
378 DESKEY(ks), DES_ENCRYPT);
379
380 setup_des_key(keys + 14, DESKEY(ks));
381 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
382 DESKEY(ks), DES_ENCRYPT);
383#elif defined(USE_GNUTLS_NETTLE)
384 struct des_ctx des;
385 setup_des_key(keys, &des);
386 des_encrypt(&des, 8, results, plaintext);
387 setup_des_key(keys + 7, &des);
388 des_encrypt(&des, 8, results + 8, plaintext);
389 setup_des_key(keys + 14, &des);
390 des_encrypt(&des, 8, results + 16, plaintext);
391#elif defined(USE_GNUTLS)
392 gcry_cipher_hd_t des;
393
394 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
395 setup_des_key(keys, &des);
396 gcry_cipher_encrypt(des, results, 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 + 7, &des);
401 gcry_cipher_encrypt(des, results + 8, 8, plaintext, 8);
402 gcry_cipher_close(des);
403
404 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
405 setup_des_key(keys + 14, &des);
406 gcry_cipher_encrypt(des, results + 16, 8, plaintext, 8);
407 gcry_cipher_close(des);
408#elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \
409 || defined(USE_WIN32_CRYPTO)
410 encrypt_des(plaintext, results, keys);
411 encrypt_des(plaintext, results + 8, keys + 7);
412 encrypt_des(plaintext, results + 16, keys + 14);
413#endif
414}
415
416/*
417 * Set up lanmanager hashed password
418 */
419CURLcode Curl_ntlm_core_mk_lm_hash(struct SessionHandle *data,
420 const char *password,
421 unsigned char *lmbuffer /* 21 bytes */)
422{
423 CURLcode result;
424 unsigned char pw[14];
425 static const unsigned char magic[] = {
426 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
427 };
428 size_t len = CURLMIN(strlen(password), 14);
429
430 Curl_strntoupper((char *)pw, password, len);
431 memset(&pw[len], 0, 14 - len);
432
433 /*
434 * The LanManager hashed password needs to be created using the
435 * password in the network encoding not the host encoding.
436 */
437 result = Curl_convert_to_network(data, (char *)pw, 14);
438 if(result)
439 return result;
440
441 {
442 /* Create LanManager hashed password. */
443
444#ifdef USE_OPENSSL
445 DES_key_schedule ks;
446
447 setup_des_key(pw, DESKEY(ks));
448 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
449 DESKEY(ks), DES_ENCRYPT);
450
451 setup_des_key(pw + 7, DESKEY(ks));
452 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
453 DESKEY(ks), DES_ENCRYPT);
454#elif defined(USE_GNUTLS_NETTLE)
455 struct des_ctx des;
456 setup_des_key(pw, &des);
457 des_encrypt(&des, 8, lmbuffer, magic);
458 setup_des_key(pw + 7, &des);
459 des_encrypt(&des, 8, lmbuffer + 8, magic);
460#elif defined(USE_GNUTLS)
461 gcry_cipher_hd_t des;
462
463 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
464 setup_des_key(pw, &des);
465 gcry_cipher_encrypt(des, lmbuffer, 8, magic, 8);
466 gcry_cipher_close(des);
467
468 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
469 setup_des_key(pw + 7, &des);
470 gcry_cipher_encrypt(des, lmbuffer + 8, 8, magic, 8);
471 gcry_cipher_close(des);
472#elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \
473 || defined(USE_WIN32_CRYPTO)
474 encrypt_des(magic, lmbuffer, pw);
475 encrypt_des(magic, lmbuffer + 8, pw + 7);
476#endif
477
478 memset(lmbuffer + 16, 0, 21 - 16);
479 }
480
481 return CURLE_OK;
482}
483
484#if USE_NTRESPONSES
485static void ascii_to_unicode_le(unsigned char *dest, const char *src,
486 size_t srclen)
487{
488 size_t i;
489 for(i = 0; i < srclen; i++) {
490 dest[2 * i] = (unsigned char)src[i];
491 dest[2 * i + 1] = '\0';
492 }
493}
494
495#if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI)
496
497static void ascii_uppercase_to_unicode_le(unsigned char *dest,
498 const char *src, size_t srclen)
499{
500 size_t i;
501 for(i = 0; i < srclen; i++) {
502 dest[2 * i] = (unsigned char)(toupper(src[i]));
503 dest[2 * i + 1] = '\0';
504 }
505}
506
507#endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
508
509/*
510 * Set up nt hashed passwords
511 * @unittest: 1600
512 */
513CURLcode Curl_ntlm_core_mk_nt_hash(struct SessionHandle *data,
514 const char *password,
515 unsigned char *ntbuffer /* 21 bytes */)
516{
517 size_t len = strlen(password);
518 unsigned char *pw = malloc(len * 2);
519 CURLcode result;
520 if(!pw)
521 return CURLE_OUT_OF_MEMORY;
522
523 ascii_to_unicode_le(pw, password, len);
524
525 /*
526 * The NT hashed password needs to be created using the password in the
527 * network encoding not the host encoding.
528 */
529 result = Curl_convert_to_network(data, (char *)pw, len * 2);
530 if(result)
531 return result;
532
533 {
534 /* Create NT hashed password. */
535#ifdef USE_OPENSSL
536 MD4_CTX MD4pw;
537 MD4_Init(&MD4pw);
538 MD4_Update(&MD4pw, pw, 2 * len);
539 MD4_Final(ntbuffer, &MD4pw);
540#elif defined(USE_GNUTLS_NETTLE)
541 struct md4_ctx MD4pw;
542 md4_init(&MD4pw);
543 md4_update(&MD4pw, (unsigned int)(2 * len), pw);
544 md4_digest(&MD4pw, MD4_DIGEST_SIZE, ntbuffer);
545#elif defined(USE_GNUTLS)
546 gcry_md_hd_t MD4pw;
547 gcry_md_open(&MD4pw, GCRY_MD_MD4, 0);
548 gcry_md_write(MD4pw, pw, 2 * len);
549 memcpy (ntbuffer, gcry_md_read (MD4pw, 0), MD4_DIGEST_LENGTH);
550 gcry_md_close(MD4pw);
551#elif defined(USE_NSS) || defined(USE_OS400CRYPTO)
552 Curl_md4it(ntbuffer, pw, 2 * len);
553#elif defined(USE_DARWINSSL)
554 (void)CC_MD4(pw, (CC_LONG)(2 * len), ntbuffer);
555#elif defined(USE_WIN32_CRYPTO)
556 HCRYPTPROV hprov;
557 if(CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
558 CRYPT_VERIFYCONTEXT)) {
559 HCRYPTHASH hhash;
560 if(CryptCreateHash(hprov, CALG_MD4, 0, 0, &hhash)) {
561 DWORD length = 16;
562 CryptHashData(hhash, pw, (unsigned int)len * 2, 0);
563 CryptGetHashParam(hhash, HP_HASHVAL, ntbuffer, &length, 0);
564 CryptDestroyHash(hhash);
565 }
566 CryptReleaseContext(hprov, 0);
567 }
568#endif
569
570 memset(ntbuffer + 16, 0, 21 - 16);
571 }
572
573 free(pw);
574
575 return CURLE_OK;
576}
577
578#if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI)
579
580/* This returns the HMAC MD5 digest */
581CURLcode Curl_hmac_md5(const unsigned char *key, unsigned int keylen,
582 const unsigned char *data, unsigned int datalen,
583 unsigned char *output)
584{
585 HMAC_context *ctxt = Curl_HMAC_init(Curl_HMAC_MD5, key, keylen);
586
587 if(!ctxt)
588 return CURLE_OUT_OF_MEMORY;
589
590 /* Update the digest with the given challenge */
591 Curl_HMAC_update(ctxt, data, datalen);
592
593 /* Finalise the digest */
594 Curl_HMAC_final(ctxt, output);
595
596 return CURLE_OK;
597}
598
599/* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
600 * (uppercase UserName + Domain) as the data
601 */
602CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
603 const char *domain, size_t domlen,
604 unsigned char *ntlmhash,
605 unsigned char *ntlmv2hash)
606{
607 /* Unicode representation */
608 size_t identity_len = (userlen + domlen) * 2;
609 unsigned char *identity = malloc(identity_len);
610 CURLcode result = CURLE_OK;
611
612 if(!identity)
613 return CURLE_OUT_OF_MEMORY;
614
615 ascii_uppercase_to_unicode_le(identity, user, userlen);
616 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
617
618 result = Curl_hmac_md5(ntlmhash, 16, identity, curlx_uztoui(identity_len),
619 ntlmv2hash);
620
621 free(identity);
622
623 return result;
624}
625
626/*
627 * Curl_ntlm_core_mk_ntlmv2_resp()
628 *
629 * This creates the NTLMv2 response as set in the ntlm type-3 message.
630 *
631 * Parameters:
632 *
633 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
634 * challenge_client [in] - The client nonce (8 bytes)
635 * ntlm [in] - The ntlm data struct being used to read TargetInfo
636 and Server challenge received in the type-2 message
637 * ntresp [out] - The address where a pointer to newly allocated
638 * memory holding the NTLMv2 response.
639 * ntresp_len [out] - The length of the output message.
640 *
641 * Returns CURLE_OK on success.
642 */
643CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
644 unsigned char *challenge_client,
645 struct ntlmdata *ntlm,
646 unsigned char **ntresp,
647 unsigned int *ntresp_len)
648{
649/* NTLMv2 response structure :
650------------------------------------------------------------------------------
6510 HMAC MD5 16 bytes
652------BLOB--------------------------------------------------------------------
65316 Signature 0x01010000
65420 Reserved long (0x00000000)
65524 Timestamp LE, 64-bit signed value representing the number of
656 tenths of a microsecond since January 1, 1601.
65732 Client Nonce 8 bytes
65840 Unknown 4 bytes
65944 Target Info N bytes (from the type-2 message)
66044+N Unknown 4 bytes
661------------------------------------------------------------------------------
662*/
663
664 unsigned int len = 0;
665 unsigned char *ptr = NULL;
666 unsigned char hmac_output[NTLM_HMAC_MD5_LEN];
667 curl_off_t tw;
668
669 CURLcode result = CURLE_OK;
670
671#if CURL_SIZEOF_CURL_OFF_T < 8
672#error "this section needs 64bit support to work"
673#endif
674
675 /* Calculate the timestamp */
676#ifdef DEBUGBUILD
677 char *force_timestamp = getenv("CURL_FORCETIME");
678 if(force_timestamp)
679 tw = CURL_OFF_T_C(11644473600) * 10000000;
680 else
681#endif
682 tw = ((curl_off_t)time(NULL) + CURL_OFF_T_C(11644473600)) * 10000000;
683
684 /* Calculate the response len */
685 len = NTLM_HMAC_MD5_LEN + NTLMv2_BLOB_LEN;
686
687 /* Allocate the response */
688 ptr = malloc(len);
689 if(!ptr)
690 return CURLE_OUT_OF_MEMORY;
691
692 memset(ptr, 0, len);
693
694 /* Create the BLOB structure */
695 snprintf((char *)ptr + NTLM_HMAC_MD5_LEN, NTLMv2_BLOB_LEN,
696 NTLMv2_BLOB_SIGNATURE
697 "%c%c%c%c", /* Reserved = 0 */
698 0, 0, 0, 0);
699
700 Curl_write64_le(tw, ptr + 24);
701 memcpy(ptr + 32, challenge_client, 8);
702 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
703
704 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
705 memcpy(ptr + 8, &ntlm->nonce[0], 8);
706 result = Curl_hmac_md5(ntlmv2hash, NTLM_HMAC_MD5_LEN, ptr + 8,
707 NTLMv2_BLOB_LEN + 8, hmac_output);
708 if(result) {
709 free(ptr);
710 return result;
711 }
712
713 /* Concatenate the HMAC MD5 output with the BLOB */
714 memcpy(ptr, hmac_output, NTLM_HMAC_MD5_LEN);
715
716 /* Return the response */
717 *ntresp = ptr;
718 *ntresp_len = len;
719
720 return result;
721}
722
723/*
724 * Curl_ntlm_core_mk_lmv2_resp()
725 *
726 * This creates the LMv2 response as used in the ntlm type-3 message.
727 *
728 * Parameters:
729 *
730 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
731 * challenge_client [in] - The client nonce (8 bytes)
732 * challenge_client [in] - The server challenge (8 bytes)
733 * lmresp [out] - The LMv2 response (24 bytes)
734 *
735 * Returns CURLE_OK on success.
736 */
737CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
738 unsigned char *challenge_client,
739 unsigned char *challenge_server,
740 unsigned char *lmresp)
741{
742 unsigned char data[16];
743 unsigned char hmac_output[16];
744 CURLcode result = CURLE_OK;
745
746 memcpy(&data[0], challenge_server, 8);
747 memcpy(&data[8], challenge_client, 8);
748
749 result = Curl_hmac_md5(ntlmv2hash, 16, &data[0], 16, hmac_output);
750 if(result)
751 return result;
752
753 /* Concatenate the HMAC MD5 output with the client nonce */
754 memcpy(lmresp, hmac_output, 16);
755 memcpy(lmresp+16, challenge_client, 8);
756
757 return result;
758}
759
760#endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
761
762#endif /* USE_NTRESPONSES */
763
764#endif /* !USE_WINDOWS_SSPI || USE_WIN32_CRYPTO */
765
766#endif /* USE_NTLM */
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