1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2020, 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_CURL_NTLM_CORE)
26
27 /*
28 * NTLM details:
29 *
30 * https://davenport.sourceforge.io/ntlm.html
31 * https://www.innovation.ch/java/ntlm.html
32 */
33
34 /* Please keep the SSL backend-specific #if branches in this order:
35
36 1. USE_OPENSSL
37 2. USE_GNUTLS_NETTLE
38 3. USE_GNUTLS
39 4. USE_NSS
40 5. USE_MBEDTLS
41 6. USE_SECTRANSP
42 7. USE_OS400CRYPTO
43 8. USE_WIN32_CRYPTO
44
45 This ensures that:
46 - the same SSL branch gets activated throughout this source
47 file even if multiple backends are enabled at the same time.
48 - OpenSSL and NSS have higher priority than Windows Crypt, due
49 to issues with the latter supporting NTLM2Session responses
50 in NTLM type-3 messages.
51 */
52
53 #if defined(USE_OPENSSL) || defined(USE_WOLFSSL)
54
55 #ifdef USE_WOLFSSL
56 #include <wolfssl/options.h>
57 #endif
58
59 # include <openssl/des.h>
60 # include <openssl/md5.h>
61 # include <openssl/ssl.h>
62 # include <openssl/rand.h>
63 # if (defined(OPENSSL_VERSION_NUMBER) && \
64 (OPENSSL_VERSION_NUMBER < 0x00907001L)) && !defined(USE_WOLFSSL)
65 # define DES_key_schedule des_key_schedule
66 # define DES_cblock des_cblock
67 # define DES_set_odd_parity des_set_odd_parity
68 # define DES_set_key des_set_key
69 # define DES_ecb_encrypt des_ecb_encrypt
70 # define DESKEY(x) x
71 # define DESKEYARG(x) x
72 # else
73 # define DESKEYARG(x) *x
74 # define DESKEY(x) &x
75 # endif
76
77 #elif defined(USE_GNUTLS_NETTLE)
78
79 # include <nettle/des.h>
80
81 #elif defined(USE_GNUTLS)
82
83 # include <gcrypt.h>
84
85 #elif defined(USE_NSS)
86
87 # include <nss.h>
88 # include <pk11pub.h>
89 # include <hasht.h>
90
91 #elif defined(USE_MBEDTLS)
92
93 # include <mbedtls/des.h>
94 # include "curl_md4.h"
95
96 #elif defined(USE_SECTRANSP)
97
98 # include <CommonCrypto/CommonCryptor.h>
99 # include <CommonCrypto/CommonDigest.h>
100
101 #elif defined(USE_OS400CRYPTO)
102 # include "cipher.mih" /* mih/cipher */
103 #elif defined(USE_WIN32_CRYPTO)
104 # include <wincrypt.h>
105 #else
106 # error "Can't compile NTLM support without a crypto library."
107 #endif
108
109 #include "urldata.h"
110 #include "non-ascii.h"
111 #include "strcase.h"
112 #include "curl_ntlm_core.h"
113 #include "curl_md5.h"
114 #include "curl_hmac.h"
115 #include "warnless.h"
116 #include "curl_endian.h"
117 #include "curl_des.h"
118 #include "curl_md4.h"
119 /* The last 3 #include files should be in this order */
120 #include "curl_printf.h"
121 #include "curl_memory.h"
122 #include "memdebug.h"
123
124 #define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00"
125 #define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4)
126
127 /*
128 * Turns a 56-bit key into being 64-bit wide.
129 */
extend_key_56_to_64(const unsigned char * key_56,char * key)130 static void extend_key_56_to_64(const unsigned char *key_56, char *key)
131 {
132 key[0] = key_56[0];
133 key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1));
134 key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2));
135 key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3));
136 key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4));
137 key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5));
138 key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6));
139 key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF);
140 }
141
142 #if defined(USE_OPENSSL) || defined(USE_WOLFSSL)
143 /*
144 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The
145 * key schedule ks is also set.
146 */
setup_des_key(const unsigned char * key_56,DES_key_schedule DESKEYARG (ks))147 static void setup_des_key(const unsigned char *key_56,
148 DES_key_schedule DESKEYARG(ks))
149 {
150 DES_cblock key;
151
152 /* Expand the 56-bit key to 64-bits */
153 extend_key_56_to_64(key_56, (char *) &key);
154
155 /* Set the key parity to odd */
156 DES_set_odd_parity(&key);
157
158 /* Set the key */
159 DES_set_key(&key, ks);
160 }
161
162 #elif defined(USE_GNUTLS_NETTLE)
163
setup_des_key(const unsigned char * key_56,struct des_ctx * des)164 static void setup_des_key(const unsigned char *key_56,
165 struct des_ctx *des)
166 {
167 char key[8];
168
169 /* Expand the 56-bit key to 64-bits */
170 extend_key_56_to_64(key_56, key);
171
172 /* Set the key parity to odd */
173 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
174
175 /* Set the key */
176 des_set_key(des, (const uint8_t *) key);
177 }
178
179 #elif defined(USE_GNUTLS)
180
181 /*
182 * Turns a 56 bit key into the 64 bit, odd parity key and sets the key.
183 */
setup_des_key(const unsigned char * key_56,gcry_cipher_hd_t * des)184 static void setup_des_key(const unsigned char *key_56,
185 gcry_cipher_hd_t *des)
186 {
187 char key[8];
188
189 /* Expand the 56-bit key to 64-bits */
190 extend_key_56_to_64(key_56, key);
191
192 /* Set the key parity to odd */
193 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
194
195 /* Set the key */
196 gcry_cipher_setkey(*des, key, sizeof(key));
197 }
198
199 #elif defined(USE_NSS)
200
201 /*
202 * Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using
203 * the expanded key. The caller is responsible for giving 64 bit of valid
204 * data is IN and (at least) 64 bit large buffer as OUT.
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 const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */
210 char key[8]; /* expanded 64 bit key */
211 SECItem key_item;
212 PK11SymKey *symkey = NULL;
213 SECItem *param = NULL;
214 PK11Context *ctx = NULL;
215 int out_len; /* not used, required by NSS */
216 bool rv = FALSE;
217
218 /* use internal slot for DES encryption (requires NSS to be initialized) */
219 PK11SlotInfo *slot = PK11_GetInternalKeySlot();
220 if(!slot)
221 return FALSE;
222
223 /* Expand the 56-bit key to 64-bits */
224 extend_key_56_to_64(key_56, key);
225
226 /* Set the key parity to odd */
227 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
228
229 /* Import the key */
230 key_item.data = (unsigned char *)key;
231 key_item.len = sizeof(key);
232 symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT,
233 &key_item, NULL);
234 if(!symkey)
235 goto fail;
236
237 /* Create the DES encryption context */
238 param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL);
239 if(!param)
240 goto fail;
241 ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param);
242 if(!ctx)
243 goto fail;
244
245 /* Perform the encryption */
246 if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8,
247 (unsigned char *)in, /* inbuflen */ 8)
248 && SECSuccess == PK11_Finalize(ctx))
249 rv = /* all OK */ TRUE;
250
251 fail:
252 /* cleanup */
253 if(ctx)
254 PK11_DestroyContext(ctx, PR_TRUE);
255 if(symkey)
256 PK11_FreeSymKey(symkey);
257 if(param)
258 SECITEM_FreeItem(param, PR_TRUE);
259 PK11_FreeSlot(slot);
260 return rv;
261 }
262
263 #elif defined(USE_MBEDTLS)
264
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)265 static bool encrypt_des(const unsigned char *in, unsigned char *out,
266 const unsigned char *key_56)
267 {
268 mbedtls_des_context ctx;
269 char key[8];
270
271 /* Expand the 56-bit key to 64-bits */
272 extend_key_56_to_64(key_56, key);
273
274 /* Set the key parity to odd */
275 mbedtls_des_key_set_parity((unsigned char *) key);
276
277 /* Perform the encryption */
278 mbedtls_des_init(&ctx);
279 mbedtls_des_setkey_enc(&ctx, (unsigned char *) key);
280 return mbedtls_des_crypt_ecb(&ctx, in, out) == 0;
281 }
282
283 #elif defined(USE_SECTRANSP)
284
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)285 static bool encrypt_des(const unsigned char *in, unsigned char *out,
286 const unsigned char *key_56)
287 {
288 char key[8];
289 size_t out_len;
290 CCCryptorStatus err;
291
292 /* Expand the 56-bit key to 64-bits */
293 extend_key_56_to_64(key_56, key);
294
295 /* Set the key parity to odd */
296 Curl_des_set_odd_parity((unsigned char *) key, sizeof(key));
297
298 /* Perform the encryption */
299 err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key,
300 kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out,
301 8 /* outbuflen */, &out_len);
302
303 return err == kCCSuccess;
304 }
305
306 #elif defined(USE_OS400CRYPTO)
307
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)308 static bool encrypt_des(const unsigned char *in, unsigned char *out,
309 const unsigned char *key_56)
310 {
311 char key[8];
312 _CIPHER_Control_T ctl;
313
314 /* Setup the cipher control structure */
315 ctl.Func_ID = ENCRYPT_ONLY;
316 ctl.Data_Len = sizeof(key);
317
318 /* Expand the 56-bit key to 64-bits */
319 extend_key_56_to_64(key_56, ctl.Crypto_Key);
320
321 /* Set the key parity to odd */
322 Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len);
323
324 /* Perform the encryption */
325 _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in);
326
327 return TRUE;
328 }
329
330 #elif defined(USE_WIN32_CRYPTO)
331
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)332 static bool encrypt_des(const unsigned char *in, unsigned char *out,
333 const unsigned char *key_56)
334 {
335 HCRYPTPROV hprov;
336 HCRYPTKEY hkey;
337 struct {
338 BLOBHEADER hdr;
339 unsigned int len;
340 char key[8];
341 } blob;
342 DWORD len = 8;
343
344 /* Acquire the crypto provider */
345 if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL,
346 CRYPT_VERIFYCONTEXT | CRYPT_SILENT))
347 return FALSE;
348
349 /* Setup the key blob structure */
350 memset(&blob, 0, sizeof(blob));
351 blob.hdr.bType = PLAINTEXTKEYBLOB;
352 blob.hdr.bVersion = 2;
353 blob.hdr.aiKeyAlg = CALG_DES;
354 blob.len = sizeof(blob.key);
355
356 /* Expand the 56-bit key to 64-bits */
357 extend_key_56_to_64(key_56, blob.key);
358
359 /* Set the key parity to odd */
360 Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key));
361
362 /* Import the key */
363 if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) {
364 CryptReleaseContext(hprov, 0);
365
366 return FALSE;
367 }
368
369 memcpy(out, in, 8);
370
371 /* Perform the encryption */
372 CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len);
373
374 CryptDestroyKey(hkey);
375 CryptReleaseContext(hprov, 0);
376
377 return TRUE;
378 }
379
380 #endif /* defined(USE_WIN32_CRYPTO) */
381
382 /*
383 * takes a 21 byte array and treats it as 3 56-bit DES keys. The
384 * 8 byte plaintext is encrypted with each key and the resulting 24
385 * bytes are stored in the results array.
386 */
Curl_ntlm_core_lm_resp(const unsigned char * keys,const unsigned char * plaintext,unsigned char * results)387 void Curl_ntlm_core_lm_resp(const unsigned char *keys,
388 const unsigned char *plaintext,
389 unsigned char *results)
390 {
391 #if defined(USE_OPENSSL) || defined(USE_WOLFSSL)
392 DES_key_schedule ks;
393
394 setup_des_key(keys, DESKEY(ks));
395 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results,
396 DESKEY(ks), DES_ENCRYPT);
397
398 setup_des_key(keys + 7, DESKEY(ks));
399 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8),
400 DESKEY(ks), DES_ENCRYPT);
401
402 setup_des_key(keys + 14, DESKEY(ks));
403 DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16),
404 DESKEY(ks), DES_ENCRYPT);
405 #elif defined(USE_GNUTLS_NETTLE)
406 struct des_ctx des;
407 setup_des_key(keys, &des);
408 des_encrypt(&des, 8, results, plaintext);
409 setup_des_key(keys + 7, &des);
410 des_encrypt(&des, 8, results + 8, plaintext);
411 setup_des_key(keys + 14, &des);
412 des_encrypt(&des, 8, results + 16, plaintext);
413 #elif defined(USE_GNUTLS)
414 gcry_cipher_hd_t des;
415
416 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
417 setup_des_key(keys, &des);
418 gcry_cipher_encrypt(des, results, 8, plaintext, 8);
419 gcry_cipher_close(des);
420
421 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
422 setup_des_key(keys + 7, &des);
423 gcry_cipher_encrypt(des, results + 8, 8, plaintext, 8);
424 gcry_cipher_close(des);
425
426 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
427 setup_des_key(keys + 14, &des);
428 gcry_cipher_encrypt(des, results + 16, 8, plaintext, 8);
429 gcry_cipher_close(des);
430 #elif defined(USE_NSS) || defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
431 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
432 encrypt_des(plaintext, results, keys);
433 encrypt_des(plaintext, results + 8, keys + 7);
434 encrypt_des(plaintext, results + 16, keys + 14);
435 #endif
436 }
437
438 /*
439 * Set up lanmanager hashed password
440 */
Curl_ntlm_core_mk_lm_hash(struct Curl_easy * data,const char * password,unsigned char * lmbuffer)441 CURLcode Curl_ntlm_core_mk_lm_hash(struct Curl_easy *data,
442 const char *password,
443 unsigned char *lmbuffer /* 21 bytes */)
444 {
445 CURLcode result;
446 unsigned char pw[14];
447 static const unsigned char magic[] = {
448 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */
449 };
450 size_t len = CURLMIN(strlen(password), 14);
451
452 Curl_strntoupper((char *)pw, password, len);
453 memset(&pw[len], 0, 14 - len);
454
455 /*
456 * The LanManager hashed password needs to be created using the
457 * password in the network encoding not the host encoding.
458 */
459 result = Curl_convert_to_network(data, (char *)pw, 14);
460 if(result)
461 return result;
462
463 {
464 /* Create LanManager hashed password. */
465
466 #if defined(USE_OPENSSL) || defined(USE_WOLFSSL)
467 DES_key_schedule ks;
468
469 setup_des_key(pw, DESKEY(ks));
470 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer,
471 DESKEY(ks), DES_ENCRYPT);
472
473 setup_des_key(pw + 7, DESKEY(ks));
474 DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8),
475 DESKEY(ks), DES_ENCRYPT);
476 #elif defined(USE_GNUTLS_NETTLE)
477 struct des_ctx des;
478 setup_des_key(pw, &des);
479 des_encrypt(&des, 8, lmbuffer, magic);
480 setup_des_key(pw + 7, &des);
481 des_encrypt(&des, 8, lmbuffer + 8, magic);
482 #elif defined(USE_GNUTLS)
483 gcry_cipher_hd_t des;
484
485 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
486 setup_des_key(pw, &des);
487 gcry_cipher_encrypt(des, lmbuffer, 8, magic, 8);
488 gcry_cipher_close(des);
489
490 gcry_cipher_open(&des, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_ECB, 0);
491 setup_des_key(pw + 7, &des);
492 gcry_cipher_encrypt(des, lmbuffer + 8, 8, magic, 8);
493 gcry_cipher_close(des);
494 #elif defined(USE_NSS) || defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \
495 || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO)
496 encrypt_des(magic, lmbuffer, pw);
497 encrypt_des(magic, lmbuffer + 8, pw + 7);
498 #endif
499
500 memset(lmbuffer + 16, 0, 21 - 16);
501 }
502
503 return CURLE_OK;
504 }
505
506 #ifdef USE_NTRESPONSES
ascii_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)507 static void ascii_to_unicode_le(unsigned char *dest, const char *src,
508 size_t srclen)
509 {
510 size_t i;
511 for(i = 0; i < srclen; i++) {
512 dest[2 * i] = (unsigned char)src[i];
513 dest[2 * i + 1] = '\0';
514 }
515 }
516
517 #if defined(USE_NTLM_V2) && !defined(USE_WINDOWS_SSPI)
518
ascii_uppercase_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)519 static void ascii_uppercase_to_unicode_le(unsigned char *dest,
520 const char *src, size_t srclen)
521 {
522 size_t i;
523 for(i = 0; i < srclen; i++) {
524 dest[2 * i] = (unsigned char)(Curl_raw_toupper(src[i]));
525 dest[2 * i + 1] = '\0';
526 }
527 }
528
529 #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
530
531 /*
532 * Set up nt hashed passwords
533 * @unittest: 1600
534 */
Curl_ntlm_core_mk_nt_hash(struct Curl_easy * data,const char * password,unsigned char * ntbuffer)535 CURLcode Curl_ntlm_core_mk_nt_hash(struct Curl_easy *data,
536 const char *password,
537 unsigned char *ntbuffer /* 21 bytes */)
538 {
539 size_t len = strlen(password);
540 unsigned char *pw;
541 CURLcode result;
542 if(len > SIZE_T_MAX/2) /* avoid integer overflow */
543 return CURLE_OUT_OF_MEMORY;
544 pw = len ? malloc(len * 2) : (unsigned char *)strdup("");
545 if(!pw)
546 return CURLE_OUT_OF_MEMORY;
547
548 ascii_to_unicode_le(pw, password, len);
549
550 /*
551 * The NT hashed password needs to be created using the password in the
552 * network encoding not the host encoding.
553 */
554 result = Curl_convert_to_network(data, (char *)pw, len * 2);
555 if(result)
556 return result;
557
558 /* Create NT hashed password. */
559 Curl_md4it(ntbuffer, pw, 2 * len);
560
561 memset(ntbuffer + 16, 0, 21 - 16);
562
563 free(pw);
564
565 return CURLE_OK;
566 }
567
568 #if defined(USE_NTLM_V2) && !defined(USE_WINDOWS_SSPI)
569
570 /* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode
571 * (uppercase UserName + Domain) as the data
572 */
Curl_ntlm_core_mk_ntlmv2_hash(const char * user,size_t userlen,const char * domain,size_t domlen,unsigned char * ntlmhash,unsigned char * ntlmv2hash)573 CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen,
574 const char *domain, size_t domlen,
575 unsigned char *ntlmhash,
576 unsigned char *ntlmv2hash)
577 {
578 /* Unicode representation */
579 size_t identity_len;
580 unsigned char *identity;
581 CURLcode result = CURLE_OK;
582
583 /* we do the length checks below separately to avoid integer overflow risk
584 on extreme data lengths */
585 if((userlen > SIZE_T_MAX/2) ||
586 (domlen > SIZE_T_MAX/2) ||
587 ((userlen + domlen) > SIZE_T_MAX/2))
588 return CURLE_OUT_OF_MEMORY;
589
590 identity_len = (userlen + domlen) * 2;
591 identity = malloc(identity_len);
592
593 if(!identity)
594 return CURLE_OUT_OF_MEMORY;
595
596 ascii_uppercase_to_unicode_le(identity, user, userlen);
597 ascii_to_unicode_le(identity + (userlen << 1), domain, domlen);
598
599 result = Curl_hmacit(Curl_HMAC_MD5, ntlmhash, 16, identity, identity_len,
600 ntlmv2hash);
601 free(identity);
602
603 return result;
604 }
605
606 /*
607 * Curl_ntlm_core_mk_ntlmv2_resp()
608 *
609 * This creates the NTLMv2 response as set in the ntlm type-3 message.
610 *
611 * Parameters:
612 *
613 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
614 * challenge_client [in] - The client nonce (8 bytes)
615 * ntlm [in] - The ntlm data struct being used to read TargetInfo
616 and Server challenge received in the type-2 message
617 * ntresp [out] - The address where a pointer to newly allocated
618 * memory holding the NTLMv2 response.
619 * ntresp_len [out] - The length of the output message.
620 *
621 * Returns CURLE_OK on success.
622 */
Curl_ntlm_core_mk_ntlmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,struct ntlmdata * ntlm,unsigned char ** ntresp,unsigned int * ntresp_len)623 CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash,
624 unsigned char *challenge_client,
625 struct ntlmdata *ntlm,
626 unsigned char **ntresp,
627 unsigned int *ntresp_len)
628 {
629 /* NTLMv2 response structure :
630 ------------------------------------------------------------------------------
631 0 HMAC MD5 16 bytes
632 ------BLOB--------------------------------------------------------------------
633 16 Signature 0x01010000
634 20 Reserved long (0x00000000)
635 24 Timestamp LE, 64-bit signed value representing the number of
636 tenths of a microsecond since January 1, 1601.
637 32 Client Nonce 8 bytes
638 40 Unknown 4 bytes
639 44 Target Info N bytes (from the type-2 message)
640 44+N Unknown 4 bytes
641 ------------------------------------------------------------------------------
642 */
643
644 unsigned int len = 0;
645 unsigned char *ptr = NULL;
646 unsigned char hmac_output[HMAC_MD5_LENGTH];
647 curl_off_t tw;
648
649 CURLcode result = CURLE_OK;
650
651 #if CURL_SIZEOF_CURL_OFF_T < 8
652 #error "this section needs 64bit support to work"
653 #endif
654
655 /* Calculate the timestamp */
656 #ifdef DEBUGBUILD
657 char *force_timestamp = getenv("CURL_FORCETIME");
658 if(force_timestamp)
659 tw = CURL_OFF_T_C(11644473600) * 10000000;
660 else
661 #endif
662 tw = ((curl_off_t)time(NULL) + CURL_OFF_T_C(11644473600)) * 10000000;
663
664 /* Calculate the response len */
665 len = HMAC_MD5_LENGTH + NTLMv2_BLOB_LEN;
666
667 /* Allocate the response */
668 ptr = calloc(1, len);
669 if(!ptr)
670 return CURLE_OUT_OF_MEMORY;
671
672 /* Create the BLOB structure */
673 msnprintf((char *)ptr + HMAC_MD5_LENGTH, NTLMv2_BLOB_LEN,
674 "%c%c%c%c" /* NTLMv2_BLOB_SIGNATURE */
675 "%c%c%c%c", /* Reserved = 0 */
676 NTLMv2_BLOB_SIGNATURE[0], NTLMv2_BLOB_SIGNATURE[1],
677 NTLMv2_BLOB_SIGNATURE[2], NTLMv2_BLOB_SIGNATURE[3],
678 0, 0, 0, 0);
679
680 Curl_write64_le(tw, ptr + 24);
681 memcpy(ptr + 32, challenge_client, 8);
682 memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
683
684 /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
685 memcpy(ptr + 8, &ntlm->nonce[0], 8);
686 result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, HMAC_MD5_LENGTH, ptr + 8,
687 NTLMv2_BLOB_LEN + 8, hmac_output);
688 if(result) {
689 free(ptr);
690 return result;
691 }
692
693 /* Concatenate the HMAC MD5 output with the BLOB */
694 memcpy(ptr, hmac_output, HMAC_MD5_LENGTH);
695
696 /* Return the response */
697 *ntresp = ptr;
698 *ntresp_len = len;
699
700 return result;
701 }
702
703 /*
704 * Curl_ntlm_core_mk_lmv2_resp()
705 *
706 * This creates the LMv2 response as used in the ntlm type-3 message.
707 *
708 * Parameters:
709 *
710 * ntlmv2hash [in] - The ntlmv2 hash (16 bytes)
711 * challenge_client [in] - The client nonce (8 bytes)
712 * challenge_client [in] - The server challenge (8 bytes)
713 * lmresp [out] - The LMv2 response (24 bytes)
714 *
715 * Returns CURLE_OK on success.
716 */
Curl_ntlm_core_mk_lmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,unsigned char * challenge_server,unsigned char * lmresp)717 CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
718 unsigned char *challenge_client,
719 unsigned char *challenge_server,
720 unsigned char *lmresp)
721 {
722 unsigned char data[16];
723 unsigned char hmac_output[16];
724 CURLcode result = CURLE_OK;
725
726 memcpy(&data[0], challenge_server, 8);
727 memcpy(&data[8], challenge_client, 8);
728
729 result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, 16, &data[0], 16,
730 hmac_output);
731 if(result)
732 return result;
733
734 /* Concatenate the HMAC MD5 output with the client nonce */
735 memcpy(lmresp, hmac_output, 16);
736 memcpy(lmresp + 16, challenge_client, 8);
737
738 return result;
739 }
740
741 #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
742
743 #endif /* USE_NTRESPONSES */
744
745 #endif /* USE_CURL_NTLM_CORE */
746