1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2016, 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 * https://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 /* The last 3 #include files should be in this order */
111 #include "curl_printf.h"
112 #include "curl_memory.h"
113 #include "memdebug.h"
114
115 #define NTLM_HMAC_MD5_LEN (16)
116 #define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00"
117 #define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4)
118
119 /*
120 * Turns a 56-bit key into being 64-bit wide.
121 */
extend_key_56_to_64(const unsigned char * key_56,char * key)122 static void extend_key_56_to_64(const unsigned char *key_56, char *key)
123 {
124 key[0] = key_56[0];
125 key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
126 key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
127 key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
128 key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
129 key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
130 key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
131 key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
132 }
133
134 #ifdef USE_OPENSSL
135 /*
136 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The
137 * key schedule ks is also set.
138 */
setup_des_key(const unsigned char * key_56,DES_key_schedule DESKEYARG (ks))139 static void setup_des_key(const unsigned char *key_56,
140 DES_key_schedule DESKEYARG(ks))
141 {
142 DES_cblock key;
143
144 /* Expand the 56-bit key to 64-bits */
145 extend_key_56_to_64(key_56, (char *) &key);
146
147 /* Set the key parity to odd */
148 DES_set_odd_parity(&key);
149
150 /* Set the key */
151 DES_set_key(&key, ks);
152 }
153
154 #elif defined(USE_GNUTLS_NETTLE)
155
setup_des_key(const unsigned char * key_56,struct des_ctx * des)156 static void setup_des_key(const unsigned char *key_56,
157 struct des_ctx *des)
158 {
159 char key[8];
160
161 /* Expand the 56-bit key to 64-bits */
162 extend_key_56_to_64(key_56, key);
163
164 /* Set the key parity to odd */
165 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
166
167 /* Set the key */
168 des_set_key(des, (const uint8_t *) key);
169 }
170
171 #elif defined(USE_GNUTLS)
172
173 /*
174 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key.
175 */
setup_des_key(const unsigned char * key_56,gcry_cipher_hd_t * des)176 static void setup_des_key(const unsigned char *key_56,
177 gcry_cipher_hd_t *des)
178 {
179 char key[8];
180
181 /* Expand the 56-bit key to 64-bits */
182 extend_key_56_to_64(key_56, key);
183
184 /* Set the key parity to odd */
185 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
186
187 /* Set the key */
188 gcry_cipher_setkey(*des, key, sizeof(key));
189 }
190
191 #elif defined(USE_NSS)
192
193 /*
194 * Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using
195 * the expanded key. The caller is responsible for giving 64 bit of valid
196 * data is IN and (at least) 64 bit large buffer as OUT.
197 */
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)198 static bool encrypt_des(const unsigned char *in, unsigned char *out,
199 const unsigned char *key_56)
200 {
201 const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */
202 PK11SlotInfo *slot = NULL;
203 char key[8]; /* expanded 64 bit key */
204 SECItem key_item;
205 PK11SymKey *symkey = NULL;
206 SECItem *param = NULL;
207 PK11Context *ctx = NULL;
208 int out_len; /* not used, required by NSS */
209 bool rv = FALSE;
210
211 /* use internal slot for DES encryption (requires NSS to be initialized) */
212 slot = PK11_GetInternalKeySlot();
213 if(!slot)
214 return FALSE;
215
216 /* Expand the 56-bit key to 64-bits */
217 extend_key_56_to_64(key_56, key);
218
219 /* Set the key parity to odd */
220 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
221
222 /* Import the key */
223 key_item.data = (unsigned char *)key;
224 key_item.len = sizeof(key);
225 symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT,
226 &key_item, NULL);
227 if(!symkey)
228 goto fail;
229
230 /* Create the DES encryption context */
231 param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL);
232 if(!param)
233 goto fail;
234 ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param);
235 if(!ctx)
236 goto fail;
237
238 /* Perform the encryption */
239 if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8,
240 (unsigned char *)in, /* inbuflen */ 8)
241 && SECSuccess == PK11_Finalize(ctx))
242 rv = /* all OK */ TRUE;
243
244 fail:
245 /* cleanup */
246 if(ctx)
247 PK11_DestroyContext(ctx, PR_TRUE);
248 if(symkey)
249 PK11_FreeSymKey(symkey);
250 if(param)
251 SECITEM_FreeItem(param, PR_TRUE);
252 PK11_FreeSlot(slot);
253 return rv;
254 }
255
256 #elif defined(USE_DARWINSSL)
257
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)258 static bool encrypt_des(const unsigned char *in, unsigned char *out,
259 const unsigned char *key_56)
260 {
261 char key[8];
262 size_t out_len;
263 CCCryptorStatus err;
264
265 /* Expand the 56-bit key to 64-bits */
266 extend_key_56_to_64(key_56, key);
267
268 /* Set the key parity to odd */
269 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
270
271 /* Perform the encryption */
272 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
273 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
274 8 /* outbuflen */, &out_len);
275
276 return err == kCCSuccess;
277 }
278
279 #elif defined(USE_OS400CRYPTO)
280
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)281 static bool encrypt_des(const unsigned char *in, unsigned char *out,
282 const unsigned char *key_56)
283 {
284 char key[8];
285 _CIPHER_Control_T ctl;
286
287 /* Setup the cipher control structure */
288 ctl.Func_ID = ENCRYPT_ONLY;
289 ctl.Data_Len = sizeof(key);
290
291 /* Expand the 56-bit key to 64-bits */
292 extend_key_56_to_64(key_56, ctl.Crypto_Key);
293
294 /* Set the key parity to odd */
295 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
296
297 /* Perform the encryption */
298 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
299
300 return TRUE;
301 }
302
303 #elif defined(USE_WIN32_CRYPTO)
304
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)305 static bool encrypt_des(const unsigned char *in, unsigned char *out,
306 const unsigned char *key_56)
307 {
308 HCRYPTPROV hprov;
309 HCRYPTKEY hkey;
310 struct {
311 BLOBHEADER hdr;
312 unsigned int len;
313 char key[8];
314 } blob;
315 DWORD len = 8;
316
317 /* Acquire the crypto provider */
318 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
319 CRYPT_VERIFYCONTEXT))
320 return FALSE;
321
322 /* Setup the key blob structure */
323 memset(&blob, 0, sizeof(blob));
324 blob.hdr.bType = PLAINTEXTKEYBLOB;
325 blob.hdr.bVersion = 2;
326 blob.hdr.aiKeyAlg = CALG_DES;
327 blob.len = sizeof(blob.key);
328
329 /* Expand the 56-bit key to 64-bits */
330 extend_key_56_to_64(key_56, blob.key);
331
332 /* Set the key parity to odd */
333 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
334
335 /* Import the key */
336 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
337 CryptReleaseContext(hprov, 0);
338
339 return FALSE;
340 }
341
342 memcpy(out, in, 8);
343
344 /* Perform the encryption */
345 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
346
347 CryptDestroyKey(hkey);
348 CryptReleaseContext(hprov, 0);
349
350 return TRUE;
351 }
352
353 #endif /* defined(USE_WIN32_CRYPTO) */
354
355 /*
356 * takes a 21 byte array and treats it as 3 56-bit DES keys. The
357 * 8 byte plaintext is encrypted with each key and the resulting 24
358 * bytes are stored in the results array.
359 */
Curl_ntlm_core_lm_resp(const unsigned char * keys,const unsigned char * plaintext,unsigned char * results)360 void Curl_ntlm_core_lm_resp(const unsigned char *keys,
361 const unsigned char *plaintext,
362 unsigned char *results)
363 {
364 #ifdef USE_OPENSSL
365 DES_key_schedule ks;
366
367 setup_des_key(keys, DESKEY(ks));
368 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
369 DESKEY(ks), DES_ENCRYPT);
370
371 setup_des_key(keys + 7, DESKEY(ks));
372 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
373 DESKEY(ks), DES_ENCRYPT);
374
375 setup_des_key(keys + 14, DESKEY(ks));
376 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
377 DESKEY(ks), DES_ENCRYPT);
378 #elif defined(USE_GNUTLS_NETTLE)
379 struct des_ctx des;
380 setup_des_key(keys, &des);
381 des_encrypt(&des, 8, results, plaintext);
382 setup_des_key(keys + 7, &des);
383 des_encrypt(&des, 8, results + 8, plaintext);
384 setup_des_key(keys + 14, &des);
385 des_encrypt(&des, 8, results + 16, plaintext);
386 #elif defined(USE_GNUTLS)
387 gcry_cipher_hd_t des;
388
389 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
390 setup_des_key(keys, &des);
391 gcry_cipher_encrypt(des, results, 8, plaintext, 8);
392 gcry_cipher_close(des);
393
394 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
395 setup_des_key(keys + 7, &des);
396 gcry_cipher_encrypt(des, results + 8, 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 + 14, &des);
401 gcry_cipher_encrypt(des, results + 16, 8, plaintext, 8);
402 gcry_cipher_close(des);
403 #elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \
404 || defined(USE_WIN32_CRYPTO)
405 encrypt_des(plaintext, results, keys);
406 encrypt_des(plaintext, results + 8, keys + 7);
407 encrypt_des(plaintext, results + 16, keys + 14);
408 #endif
409 }
410
411 /*
412 * Set up lanmanager hashed password
413 */
Curl_ntlm_core_mk_lm_hash(struct Curl_easy * data,const char * password,unsigned char * lmbuffer)414 CURLcode Curl_ntlm_core_mk_lm_hash(struct Curl_easy *data,
415 const char *password,
416 unsigned char *lmbuffer /* 21 bytes */)
417 {
418 CURLcode result;
419 unsigned char pw[14];
420 static const unsigned char magic[] = {
421 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
422 };
423 size_t len = CURLMIN(strlen(password), 14);
424
425 Curl_strntoupper((char *)pw, password, len);
426 memset(&pw[len], 0, 14 - len);
427
428 /*
429 * The LanManager hashed password needs to be created using the
430 * password in the network encoding not the host encoding.
431 */
432 result = Curl_convert_to_network(data, (char *)pw, 14);
433 if(result)
434 return result;
435
436 {
437 /* Create LanManager hashed password. */
438
439 #ifdef USE_OPENSSL
440 DES_key_schedule ks;
441
442 setup_des_key(pw, DESKEY(ks));
443 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
444 DESKEY(ks), DES_ENCRYPT);
445
446 setup_des_key(pw + 7, DESKEY(ks));
447 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
448 DESKEY(ks), DES_ENCRYPT);
449 #elif defined(USE_GNUTLS_NETTLE)
450 struct des_ctx des;
451 setup_des_key(pw, &des);
452 des_encrypt(&des, 8, lmbuffer, magic);
453 setup_des_key(pw + 7, &des);
454 des_encrypt(&des, 8, lmbuffer + 8, magic);
455 #elif defined(USE_GNUTLS)
456 gcry_cipher_hd_t des;
457
458 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
459 setup_des_key(pw, &des);
460 gcry_cipher_encrypt(des, lmbuffer, 8, magic, 8);
461 gcry_cipher_close(des);
462
463 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
464 setup_des_key(pw + 7, &des);
465 gcry_cipher_encrypt(des, lmbuffer + 8, 8, magic, 8);
466 gcry_cipher_close(des);
467 #elif defined(USE_NSS) || defined(USE_DARWINSSL) || defined(USE_OS400CRYPTO) \
468 || defined(USE_WIN32_CRYPTO)
469 encrypt_des(magic, lmbuffer, pw);
470 encrypt_des(magic, lmbuffer + 8, pw + 7);
471 #endif
472
473 memset(lmbuffer + 16, 0, 21 - 16);
474 }
475
476 return CURLE_OK;
477 }
478
479 #if USE_NTRESPONSES
ascii_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)480 static void ascii_to_unicode_le(unsigned char *dest, const char *src,
481 size_t srclen)
482 {
483 size_t i;
484 for(i = 0; i < srclen; i++) {
485 dest[2 * i] = (unsigned char)src[i];
486 dest[2 * i + 1] = '\0';
487 }
488 }
489
490 #if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI)
491
ascii_uppercase_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)492 static void ascii_uppercase_to_unicode_le(unsigned char *dest,
493 const char *src, size_t srclen)
494 {
495 size_t i;
496 for(i = 0; i < srclen; i++) {
497 dest[2 * i] = (unsigned char)(toupper(src[i]));
498 dest[2 * i + 1] = '\0';
499 }
500 }
501
502 #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
503
504 /*
505 * Set up nt hashed passwords
506 * @unittest: 1600
507 */
Curl_ntlm_core_mk_nt_hash(struct Curl_easy * data,const char * password,unsigned char * ntbuffer)508 CURLcode Curl_ntlm_core_mk_nt_hash(struct Curl_easy *data,
509 const char *password,
510 unsigned char *ntbuffer /* 21 bytes */)
511 {
512 size_t len = strlen(password);
513 unsigned char *pw = malloc(len * 2);
514 CURLcode result;
515 if(!pw)
516 return CURLE_OUT_OF_MEMORY;
517
518 ascii_to_unicode_le(pw, password, len);
519
520 /*
521 * The NT hashed password needs to be created using the password in the
522 * network encoding not the host encoding.
523 */
524 result = Curl_convert_to_network(data, (char *)pw, len * 2);
525 if(result)
526 return result;
527
528 {
529 /* Create NT hashed password. */
530 #ifdef USE_OPENSSL
531 MD4_CTX MD4pw;
532 MD4_Init(&MD4pw);
533 MD4_Update(&MD4pw, pw, 2 * len);
534 MD4_Final(ntbuffer, &MD4pw);
535 #elif defined(USE_GNUTLS_NETTLE)
536 struct md4_ctx MD4pw;
537 md4_init(&MD4pw);
538 md4_update(&MD4pw, (unsigned int)(2 * len), pw);
539 md4_digest(&MD4pw, MD4_DIGEST_SIZE, ntbuffer);
540 #elif defined(USE_GNUTLS)
541 gcry_md_hd_t MD4pw;
542 gcry_md_open(&MD4pw, GCRY_MD_MD4, 0);
543 gcry_md_write(MD4pw, pw, 2 * len);
544 memcpy (ntbuffer, gcry_md_read (MD4pw, 0), MD4_DIGEST_LENGTH);
545 gcry_md_close(MD4pw);
546 #elif defined(USE_NSS) || defined(USE_OS400CRYPTO)
547 Curl_md4it(ntbuffer, pw, 2 * len);
548 #elif defined(USE_DARWINSSL)
549 (void)CC_MD4(pw, (CC_LONG)(2 * len), ntbuffer);
550 #elif defined(USE_WIN32_CRYPTO)
551 HCRYPTPROV hprov;
552 if(CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
553 CRYPT_VERIFYCONTEXT)) {
554 HCRYPTHASH hhash;
555 if(CryptCreateHash(hprov, CALG_MD4, 0, 0, &hhash)) {
556 DWORD length = 16;
557 CryptHashData(hhash, pw, (unsigned int)len * 2, 0);
558 CryptGetHashParam(hhash, HP_HASHVAL, ntbuffer, &length, 0);
559 CryptDestroyHash(hhash);
560 }
561 CryptReleaseContext(hprov, 0);
562 }
563 #endif
564
565 memset(ntbuffer + 16, 0, 21 - 16);
566 }
567
568 free(pw);
569
570 return CURLE_OK;
571 }
572
573 #if USE_NTLM_V2 && !defined(USE_WINDOWS_SSPI)
574
575 /* This returns the HMAC MD5 digest */
Curl_hmac_md5(const unsigned char * key,unsigned int keylen,const unsigned char * data,unsigned int datalen,unsigned char * output)576 CURLcode Curl_hmac_md5(const unsigned char *key, unsigned int keylen,
577 const unsigned char *data, unsigned int datalen,
578 unsigned char *output)
579 {
580 HMAC_context *ctxt = Curl_HMAC_init(Curl_HMAC_MD5, key, keylen);
581
582 if(!ctxt)
583 return CURLE_OUT_OF_MEMORY;
584
585 /* Update the digest with the given challenge */
586 Curl_HMAC_update(ctxt, data, datalen);
587
588 /* Finalise the digest */
589 Curl_HMAC_final(ctxt, output);
590
591 return CURLE_OK;
592 }
593
594 /* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
595 * (uppercase UserName + Domain) as the data
596 */
Curl_ntlm_core_mk_ntlmv2_hash(const char * user,size_t userlen,const char * domain,size_t domlen,unsigned char * ntlmhash,unsigned char * ntlmv2hash)597 CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
598 const char *domain, size_t domlen,
599 unsigned char *ntlmhash,
600 unsigned char *ntlmv2hash)
601 {
602 /* Unicode representation */
603 size_t identity_len = (userlen + domlen) * 2;
604 unsigned char *identity = malloc(identity_len);
605 CURLcode result = CURLE_OK;
606
607 if(!identity)
608 return CURLE_OUT_OF_MEMORY;
609
610 ascii_uppercase_to_unicode_le(identity, user, userlen);
611 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
612
613 result = Curl_hmac_md5(ntlmhash, 16, identity, curlx_uztoui(identity_len),
614 ntlmv2hash);
615
616 free(identity);
617
618 return result;
619 }
620
621 /*
622 * Curl_ntlm_core_mk_ntlmv2_resp()
623 *
624 * This creates the NTLMv2 response as set in the ntlm type-3 message.
625 *
626 * Parameters:
627 *
628 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
629 * challenge_client [in] - The client nonce (8 bytes)
630 * ntlm [in] - The ntlm data struct being used to read TargetInfo
631 and Server challenge received in the type-2 message
632 * ntresp [out] - The address where a pointer to newly allocated
633 * memory holding the NTLMv2 response.
634 * ntresp_len [out] - The length of the output message.
635 *
636 * Returns CURLE_OK on success.
637 */
Curl_ntlm_core_mk_ntlmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,struct ntlmdata * ntlm,unsigned char ** ntresp,unsigned int * ntresp_len)638 CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
639 unsigned char *challenge_client,
640 struct ntlmdata *ntlm,
641 unsigned char **ntresp,
642 unsigned int *ntresp_len)
643 {
644 /* NTLMv2 response structure :
645 ------------------------------------------------------------------------------
646 0 HMAC MD5 16 bytes
647 ------BLOB--------------------------------------------------------------------
648 16 Signature 0x01010000
649 20 Reserved long (0x00000000)
650 24 Timestamp LE, 64-bit signed value representing the number of
651 tenths of a microsecond since January 1, 1601.
652 32 Client Nonce 8 bytes
653 40 Unknown 4 bytes
654 44 Target Info N bytes (from the type-2 message)
655 44+N Unknown 4 bytes
656 ------------------------------------------------------------------------------
657 */
658
659 unsigned int len = 0;
660 unsigned char *ptr = NULL;
661 unsigned char hmac_output[NTLM_HMAC_MD5_LEN];
662 curl_off_t tw;
663
664 CURLcode result = CURLE_OK;
665
666 #if CURL_SIZEOF_CURL_OFF_T < 8
667 #error "this section needs 64bit support to work"
668 #endif
669
670 /* Calculate the timestamp */
671 #ifdef DEBUGBUILD
672 char *force_timestamp = getenv("CURL_FORCETIME");
673 if(force_timestamp)
674 tw = CURL_OFF_T_C(11644473600) * 10000000;
675 else
676 #endif
677 tw = ((curl_off_t)time(NULL) + CURL_OFF_T_C(11644473600)) * 10000000;
678
679 /* Calculate the response len */
680 len = NTLM_HMAC_MD5_LEN + NTLMv2_BLOB_LEN;
681
682 /* Allocate the response */
683 ptr = malloc(len);
684 if(!ptr)
685 return CURLE_OUT_OF_MEMORY;
686
687 memset(ptr, 0, len);
688
689 /* Create the BLOB structure */
690 snprintf((char *)ptr + NTLM_HMAC_MD5_LEN, NTLMv2_BLOB_LEN,
691 NTLMv2_BLOB_SIGNATURE
692 "%c%c%c%c", /* Reserved = 0 */
693 0, 0, 0, 0);
694
695 Curl_write64_le(tw, ptr + 24);
696 memcpy(ptr + 32, challenge_client, 8);
697 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
698
699 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
700 memcpy(ptr + 8, &ntlm->nonce[0], 8);
701 result = Curl_hmac_md5(ntlmv2hash, NTLM_HMAC_MD5_LEN, ptr + 8,
702 NTLMv2_BLOB_LEN + 8, hmac_output);
703 if(result) {
704 free(ptr);
705 return result;
706 }
707
708 /* Concatenate the HMAC MD5 output with the BLOB */
709 memcpy(ptr, hmac_output, NTLM_HMAC_MD5_LEN);
710
711 /* Return the response */
712 *ntresp = ptr;
713 *ntresp_len = len;
714
715 return result;
716 }
717
718 /*
719 * Curl_ntlm_core_mk_lmv2_resp()
720 *
721 * This creates the LMv2 response as used in the ntlm type-3 message.
722 *
723 * Parameters:
724 *
725 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
726 * challenge_client [in] - The client nonce (8 bytes)
727 * challenge_client [in] - The server challenge (8 bytes)
728 * lmresp [out] - The LMv2 response (24 bytes)
729 *
730 * Returns CURLE_OK on success.
731 */
Curl_ntlm_core_mk_lmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,unsigned char * challenge_server,unsigned char * lmresp)732 CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
733 unsigned char *challenge_client,
734 unsigned char *challenge_server,
735 unsigned char *lmresp)
736 {
737 unsigned char data[16];
738 unsigned char hmac_output[16];
739 CURLcode result = CURLE_OK;
740
741 memcpy(&data[0], challenge_server, 8);
742 memcpy(&data[8], challenge_client, 8);
743
744 result = Curl_hmac_md5(ntlmv2hash, 16, &data[0], 16, hmac_output);
745 if(result)
746 return result;
747
748 /* Concatenate the HMAC MD5 output with the client nonce */
749 memcpy(lmresp, hmac_output, 16);
750 memcpy(lmresp+16, challenge_client, 8);
751
752 return result;
753 }
754
755 #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
756
757 #endif /* USE_NTRESPONSES */
758
759 #endif /* !USE_WINDOWS_SSPI || USE_WIN32_CRYPTO */
760
761 #endif /* USE_NTLM */
762