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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 http://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 */
extend_key_56_to_64(const unsigned char * key_56,char * key)123 static 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  */
setup_des_key(const unsigned char * key_56,DES_key_schedule DESKEYARG (ks))140 static 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 #if defined(HAVE_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 
setup_des_key(const unsigned char * key_56,struct des_ctx * des)161 static 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  */
setup_des_key(const unsigned char * key_56,gcry_cipher_hd_t * des)181 static 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  */
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)203 static 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 
249 fail:
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 
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)263 static 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 
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)286 static 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 
encrypt_des(const unsigned char * in,unsigned char * out,const unsigned char * key_56)310 static 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   */
Curl_ntlm_core_lm_resp(const unsigned char * keys,const unsigned char * plaintext,unsigned char * results)365 void 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  */
Curl_ntlm_core_mk_lm_hash(struct SessionHandle * data,const char * password,unsigned char * lmbuffer)419 CURLcode 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
ascii_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)485 static 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 
ascii_uppercase_to_unicode_le(unsigned char * dest,const char * src,size_t srclen)497 static 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  */
Curl_ntlm_core_mk_nt_hash(struct SessionHandle * data,const char * password,unsigned char * ntbuffer)513 CURLcode 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 */
Curl_hmac_md5(const unsigned char * key,unsigned int keylen,const unsigned char * data,unsigned int datalen,unsigned char * output)581 CURLcode 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  */
Curl_ntlm_core_mk_ntlmv2_hash(const char * user,size_t userlen,const char * domain,size_t domlen,unsigned char * ntlmhash,unsigned char * ntlmv2hash)602 CURLcode 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  */
Curl_ntlm_core_mk_ntlmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,struct ntlmdata * ntlm,unsigned char ** ntresp,unsigned int * ntresp_len)643 CURLcode 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 ------------------------------------------------------------------------------
651 0     HMAC MD5         16 bytes
652 ------BLOB--------------------------------------------------------------------
653 16    Signature        0x01010000
654 20    Reserved         long (0x00000000)
655 24    Timestamp        LE, 64-bit signed value representing the number of
656                        tenths of a microsecond since January 1, 1601.
657 32    Client Nonce     8 bytes
658 40    Unknown          4 bytes
659 44    Target Info      N bytes (from the type-2 message)
660 44+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 #if defined(HAVE_LONGLONG)
668   long long tw;
669 #else
670   __int64 tw;
671 #endif
672   CURLcode result = CURLE_OK;
673 
674   /* Calculate the timestamp */
675 #ifdef DEBUGBUILD
676   char *force_timestamp = getenv("CURL_FORCETIME");
677   if(force_timestamp)
678     tw = 11644473600ULL * 10000000ULL;
679   else
680 #endif
681   tw = ((long long)time(NULL) + 11644473600ULL) * 10000000ULL;
682 
683   /* Calculate the response len */
684   len = NTLM_HMAC_MD5_LEN + NTLMv2_BLOB_LEN;
685 
686   /* Allocate the response */
687   ptr = malloc(len);
688   if(!ptr)
689     return CURLE_OUT_OF_MEMORY;
690 
691   memset(ptr, 0, len);
692 
693   /* Create the BLOB structure */
694   snprintf((char *)ptr + NTLM_HMAC_MD5_LEN, NTLMv2_BLOB_LEN,
695            NTLMv2_BLOB_SIGNATURE
696            "%c%c%c%c",  /* Reserved = 0 */
697            0, 0, 0, 0);
698 
699   Curl_write64_le(tw, ptr + 24);
700   memcpy(ptr + 32, challenge_client, 8);
701   memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len);
702 
703   /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */
704   memcpy(ptr + 8, &ntlm->nonce[0], 8);
705   result = Curl_hmac_md5(ntlmv2hash, NTLM_HMAC_MD5_LEN, ptr + 8,
706                          NTLMv2_BLOB_LEN + 8, hmac_output);
707   if(result) {
708     free(ptr);
709     return result;
710   }
711 
712   /* Concatenate the HMAC MD5 output  with the BLOB */
713   memcpy(ptr, hmac_output, NTLM_HMAC_MD5_LEN);
714 
715   /* Return the response */
716   *ntresp = ptr;
717   *ntresp_len = len;
718 
719   return result;
720 }
721 
722 /*
723  * Curl_ntlm_core_mk_lmv2_resp()
724  *
725  * This creates the LMv2 response as used in the ntlm type-3 message.
726  *
727  * Parameters:
728  *
729  * ntlmv2hash        [in] - The ntlmv2 hash (16 bytes)
730  * challenge_client  [in] - The client nonce (8 bytes)
731  * challenge_client  [in] - The server challenge (8 bytes)
732  * lmresp           [out] - The LMv2 response (24 bytes)
733  *
734  * Returns CURLE_OK on success.
735  */
Curl_ntlm_core_mk_lmv2_resp(unsigned char * ntlmv2hash,unsigned char * challenge_client,unsigned char * challenge_server,unsigned char * lmresp)736 CURLcode  Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash,
737                                       unsigned char *challenge_client,
738                                       unsigned char *challenge_server,
739                                       unsigned char *lmresp)
740 {
741   unsigned char data[16];
742   unsigned char hmac_output[16];
743   CURLcode result = CURLE_OK;
744 
745   memcpy(&data[0], challenge_server, 8);
746   memcpy(&data[8], challenge_client, 8);
747 
748   result = Curl_hmac_md5(ntlmv2hash, 16, &data[0], 16, hmac_output);
749   if(result)
750     return result;
751 
752   /* Concatenate the HMAC MD5 output  with the client nonce */
753   memcpy(lmresp, hmac_output, 16);
754   memcpy(lmresp+16, challenge_client, 8);
755 
756   return result;
757 }
758 
759 #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */
760 
761 #endif /* USE_NTRESPONSES */
762 
763 #endif /* !USE_WINDOWS_SSPI || USE_WIN32_CRYPTO */
764 
765 #endif /* USE_NTLM */
766