Line data Source code
1 : /*
2 : * WPA Supplicant / shared MSCHAPV2 helper functions / RFC 2433 / RFC 2759
3 : * Copyright (c) 2004-2012, Jouni Malinen <j@w1.fi>
4 : *
5 : * This software may be distributed under the terms of the BSD license.
6 : * See README for more details.
7 : */
8 :
9 : #include "includes.h"
10 :
11 : #include "common.h"
12 : #include "sha1.h"
13 : #include "ms_funcs.h"
14 : #include "crypto.h"
15 :
16 : /**
17 : * utf8_to_ucs2 - Convert UTF-8 string to UCS-2 encoding
18 : * @utf8_string: UTF-8 string (IN)
19 : * @utf8_string_len: Length of utf8_string (IN)
20 : * @ucs2_buffer: UCS-2 buffer (OUT)
21 : * @ucs2_buffer_size: Length of UCS-2 buffer (IN)
22 : * @ucs2_string_size: Number of 2-byte words in the resulting UCS-2 string
23 : * Returns: 0 on success, -1 on failure
24 : */
25 738 : static int utf8_to_ucs2(const u8 *utf8_string, size_t utf8_string_len,
26 : u8 *ucs2_buffer, size_t ucs2_buffer_size,
27 : size_t *ucs2_string_size)
28 : {
29 : size_t i, j;
30 :
31 6708 : for (i = 0, j = 0; i < utf8_string_len; i++) {
32 5970 : u8 c = utf8_string[i];
33 5970 : if (j >= ucs2_buffer_size) {
34 : /* input too long */
35 0 : return -1;
36 : }
37 5970 : if (c <= 0x7F) {
38 5950 : WPA_PUT_LE16(ucs2_buffer + j, c);
39 5950 : j += 2;
40 40 : } else if (i == utf8_string_len - 1 ||
41 20 : j >= ucs2_buffer_size - 1) {
42 : /* incomplete surrogate */
43 0 : return -1;
44 : } else {
45 20 : u8 c2 = utf8_string[++i];
46 20 : if ((c & 0xE0) == 0xC0) {
47 : /* two-byte encoding */
48 15 : WPA_PUT_LE16(ucs2_buffer + j,
49 15 : ((c & 0x1F) << 6) | (c2 & 0x3F));
50 15 : j += 2;
51 10 : } else if (i == utf8_string_len ||
52 5 : j >= ucs2_buffer_size - 1) {
53 : /* incomplete surrogate */
54 0 : return -1;
55 : } else {
56 : /* three-byte encoding */
57 5 : u8 c3 = utf8_string[++i];
58 10 : WPA_PUT_LE16(ucs2_buffer + j,
59 5 : ((c & 0xF) << 12) |
60 5 : ((c2 & 0x3F) << 6) | (c3 & 0x3F));
61 5 : j += 2;
62 : }
63 : }
64 : }
65 :
66 738 : if (ucs2_string_size)
67 738 : *ucs2_string_size = j / 2;
68 738 : return 0;
69 : }
70 :
71 :
72 : /**
73 : * challenge_hash - ChallengeHash() - RFC 2759, Sect. 8.2
74 : * @peer_challenge: 16-octet PeerChallenge (IN)
75 : * @auth_challenge: 16-octet AuthenticatorChallenge (IN)
76 : * @username: 0-to-256-char UserName (IN)
77 : * @username_len: Length of username
78 : * @challenge: 8-octet Challenge (OUT)
79 : * Returns: 0 on success, -1 on failure
80 : */
81 741 : int challenge_hash(const u8 *peer_challenge, const u8 *auth_challenge,
82 : const u8 *username, size_t username_len, u8 *challenge)
83 : {
84 : u8 hash[SHA1_MAC_LEN];
85 : const unsigned char *addr[3];
86 : size_t len[3];
87 :
88 741 : addr[0] = peer_challenge;
89 741 : len[0] = 16;
90 741 : addr[1] = auth_challenge;
91 741 : len[1] = 16;
92 741 : addr[2] = username;
93 741 : len[2] = username_len;
94 :
95 741 : if (sha1_vector(3, addr, len, hash))
96 0 : return -1;
97 741 : os_memcpy(challenge, hash, 8);
98 741 : return 0;
99 : }
100 :
101 :
102 : /**
103 : * nt_password_hash - NtPasswordHash() - RFC 2759, Sect. 8.3
104 : * @password: 0-to-256-unicode-char Password (IN; UTF-8)
105 : * @password_len: Length of password
106 : * @password_hash: 16-octet PasswordHash (OUT)
107 : * Returns: 0 on success, -1 on failure
108 : */
109 738 : int nt_password_hash(const u8 *password, size_t password_len,
110 : u8 *password_hash)
111 : {
112 : u8 buf[512], *pos;
113 : size_t len, max_len;
114 :
115 738 : max_len = sizeof(buf);
116 738 : if (utf8_to_ucs2(password, password_len, buf, max_len, &len) < 0)
117 0 : return -1;
118 :
119 738 : len *= 2;
120 738 : pos = buf;
121 738 : return md4_vector(1, (const u8 **) &pos, &len, password_hash);
122 : }
123 :
124 :
125 : /**
126 : * hash_nt_password_hash - HashNtPasswordHash() - RFC 2759, Sect. 8.4
127 : * @password_hash: 16-octet PasswordHash (IN)
128 : * @password_hash_hash: 16-octet PasswordHashHash (OUT)
129 : * Returns: 0 on success, -1 on failure
130 : */
131 510 : int hash_nt_password_hash(const u8 *password_hash, u8 *password_hash_hash)
132 : {
133 510 : size_t len = 16;
134 510 : return md4_vector(1, &password_hash, &len, password_hash_hash);
135 : }
136 :
137 :
138 : /**
139 : * challenge_response - ChallengeResponse() - RFC 2759, Sect. 8.5
140 : * @challenge: 8-octet Challenge (IN)
141 : * @password_hash: 16-octet PasswordHash (IN)
142 : * @response: 24-octet Response (OUT)
143 : */
144 333 : void challenge_response(const u8 *challenge, const u8 *password_hash,
145 : u8 *response)
146 : {
147 : u8 zpwd[7];
148 333 : des_encrypt(challenge, password_hash, response);
149 333 : des_encrypt(challenge, password_hash + 7, response + 8);
150 333 : zpwd[0] = password_hash[14];
151 333 : zpwd[1] = password_hash[15];
152 333 : os_memset(zpwd + 2, 0, 5);
153 333 : des_encrypt(challenge, zpwd, response + 16);
154 333 : }
155 :
156 :
157 : /**
158 : * generate_nt_response - GenerateNTResponse() - RFC 2759, Sect. 8.1
159 : * @auth_challenge: 16-octet AuthenticatorChallenge (IN)
160 : * @peer_challenge: 16-octet PeerChallenge (IN)
161 : * @username: 0-to-256-char UserName (IN)
162 : * @username_len: Length of username
163 : * @password: 0-to-256-unicode-char Password (IN; UTF-8)
164 : * @password_len: Length of password
165 : * @response: 24-octet Response (OUT)
166 : * Returns: 0 on success, -1 on failure
167 : */
168 279 : int generate_nt_response(const u8 *auth_challenge, const u8 *peer_challenge,
169 : const u8 *username, size_t username_len,
170 : const u8 *password, size_t password_len,
171 : u8 *response)
172 : {
173 : u8 challenge[8];
174 : u8 password_hash[16];
175 :
176 279 : if (challenge_hash(peer_challenge, auth_challenge, username,
177 279 : username_len, challenge) ||
178 279 : nt_password_hash(password, password_len, password_hash))
179 0 : return -1;
180 279 : challenge_response(challenge, password_hash, response);
181 279 : return 0;
182 : }
183 :
184 :
185 : /**
186 : * generate_nt_response_pwhash - GenerateNTResponse() - RFC 2759, Sect. 8.1
187 : * @auth_challenge: 16-octet AuthenticatorChallenge (IN)
188 : * @peer_challenge: 16-octet PeerChallenge (IN)
189 : * @username: 0-to-256-char UserName (IN)
190 : * @username_len: Length of username
191 : * @password_hash: 16-octet PasswordHash (IN)
192 : * @response: 24-octet Response (OUT)
193 : * Returns: 0 on success, -1 on failure
194 : */
195 20 : int generate_nt_response_pwhash(const u8 *auth_challenge,
196 : const u8 *peer_challenge,
197 : const u8 *username, size_t username_len,
198 : const u8 *password_hash,
199 : u8 *response)
200 : {
201 : u8 challenge[8];
202 :
203 20 : if (challenge_hash(peer_challenge, auth_challenge,
204 : username, username_len,
205 : challenge))
206 0 : return -1;
207 20 : challenge_response(challenge, password_hash, response);
208 20 : return 0;
209 : }
210 :
211 :
212 : /**
213 : * generate_authenticator_response_pwhash - GenerateAuthenticatorResponse() - RFC 2759, Sect. 8.7
214 : * @password_hash: 16-octet PasswordHash (IN)
215 : * @nt_response: 24-octet NT-Response (IN)
216 : * @peer_challenge: 16-octet PeerChallenge (IN)
217 : * @auth_challenge: 16-octet AuthenticatorChallenge (IN)
218 : * @username: 0-to-256-char UserName (IN)
219 : * @username_len: Length of username
220 : * @response: 20-octet AuthenticatorResponse (OUT) (note: this value is usually
221 : * encoded as a 42-octet ASCII string (S=hexdump_of_response)
222 : * Returns: 0 on success, -1 on failure
223 : */
224 294 : int generate_authenticator_response_pwhash(
225 : const u8 *password_hash,
226 : const u8 *peer_challenge, const u8 *auth_challenge,
227 : const u8 *username, size_t username_len,
228 : const u8 *nt_response, u8 *response)
229 : {
230 : static const u8 magic1[39] = {
231 : 0x4D, 0x61, 0x67, 0x69, 0x63, 0x20, 0x73, 0x65, 0x72, 0x76,
232 : 0x65, 0x72, 0x20, 0x74, 0x6F, 0x20, 0x63, 0x6C, 0x69, 0x65,
233 : 0x6E, 0x74, 0x20, 0x73, 0x69, 0x67, 0x6E, 0x69, 0x6E, 0x67,
234 : 0x20, 0x63, 0x6F, 0x6E, 0x73, 0x74, 0x61, 0x6E, 0x74
235 : };
236 : static const u8 magic2[41] = {
237 : 0x50, 0x61, 0x64, 0x20, 0x74, 0x6F, 0x20, 0x6D, 0x61, 0x6B,
238 : 0x65, 0x20, 0x69, 0x74, 0x20, 0x64, 0x6F, 0x20, 0x6D, 0x6F,
239 : 0x72, 0x65, 0x20, 0x74, 0x68, 0x61, 0x6E, 0x20, 0x6F, 0x6E,
240 : 0x65, 0x20, 0x69, 0x74, 0x65, 0x72, 0x61, 0x74, 0x69, 0x6F,
241 : 0x6E
242 : };
243 :
244 : u8 password_hash_hash[16], challenge[8];
245 : const unsigned char *addr1[3];
246 294 : const size_t len1[3] = { 16, 24, sizeof(magic1) };
247 : const unsigned char *addr2[3];
248 294 : const size_t len2[3] = { SHA1_MAC_LEN, 8, sizeof(magic2) };
249 :
250 294 : addr1[0] = password_hash_hash;
251 294 : addr1[1] = nt_response;
252 294 : addr1[2] = magic1;
253 :
254 294 : addr2[0] = response;
255 294 : addr2[1] = challenge;
256 294 : addr2[2] = magic2;
257 :
258 588 : if (hash_nt_password_hash(password_hash, password_hash_hash) ||
259 588 : sha1_vector(3, addr1, len1, response) ||
260 294 : challenge_hash(peer_challenge, auth_challenge, username,
261 : username_len, challenge))
262 0 : return -1;
263 294 : return sha1_vector(3, addr2, len2, response);
264 : }
265 :
266 :
267 : /**
268 : * generate_authenticator_response - GenerateAuthenticatorResponse() - RFC 2759, Sect. 8.7
269 : * @password: 0-to-256-unicode-char Password (IN; UTF-8)
270 : * @password_len: Length of password
271 : * @nt_response: 24-octet NT-Response (IN)
272 : * @peer_challenge: 16-octet PeerChallenge (IN)
273 : * @auth_challenge: 16-octet AuthenticatorChallenge (IN)
274 : * @username: 0-to-256-char UserName (IN)
275 : * @username_len: Length of username
276 : * @response: 20-octet AuthenticatorResponse (OUT) (note: this value is usually
277 : * encoded as a 42-octet ASCII string (S=hexdump_of_response)
278 : * Returns: 0 on success, -1 on failure
279 : */
280 217 : int generate_authenticator_response(const u8 *password, size_t password_len,
281 : const u8 *peer_challenge,
282 : const u8 *auth_challenge,
283 : const u8 *username, size_t username_len,
284 : const u8 *nt_response, u8 *response)
285 : {
286 : u8 password_hash[16];
287 217 : if (nt_password_hash(password, password_len, password_hash))
288 0 : return -1;
289 217 : return generate_authenticator_response_pwhash(
290 : password_hash, peer_challenge, auth_challenge,
291 : username, username_len, nt_response, response);
292 : }
293 :
294 :
295 : /**
296 : * nt_challenge_response - NtChallengeResponse() - RFC 2433, Sect. A.5
297 : * @challenge: 8-octet Challenge (IN)
298 : * @password: 0-to-256-unicode-char Password (IN; UTF-8)
299 : * @password_len: Length of password
300 : * @response: 24-octet Response (OUT)
301 : * Returns: 0 on success, -1 on failure
302 : */
303 32 : int nt_challenge_response(const u8 *challenge, const u8 *password,
304 : size_t password_len, u8 *response)
305 : {
306 : u8 password_hash[16];
307 32 : if (nt_password_hash(password, password_len, password_hash))
308 0 : return -1;
309 32 : challenge_response(challenge, password_hash, response);
310 32 : return 0;
311 : }
312 :
313 :
314 : /**
315 : * get_master_key - GetMasterKey() - RFC 3079, Sect. 3.4
316 : * @password_hash_hash: 16-octet PasswordHashHash (IN)
317 : * @nt_response: 24-octet NTResponse (IN)
318 : * @master_key: 16-octet MasterKey (OUT)
319 : * Returns: 0 on success, -1 on failure
320 : */
321 209 : int get_master_key(const u8 *password_hash_hash, const u8 *nt_response,
322 : u8 *master_key)
323 : {
324 : static const u8 magic1[27] = {
325 : 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74,
326 : 0x68, 0x65, 0x20, 0x4d, 0x50, 0x50, 0x45, 0x20, 0x4d,
327 : 0x61, 0x73, 0x74, 0x65, 0x72, 0x20, 0x4b, 0x65, 0x79
328 : };
329 : const unsigned char *addr[3];
330 209 : const size_t len[3] = { 16, 24, sizeof(magic1) };
331 : u8 hash[SHA1_MAC_LEN];
332 :
333 209 : addr[0] = password_hash_hash;
334 209 : addr[1] = nt_response;
335 209 : addr[2] = magic1;
336 :
337 209 : if (sha1_vector(3, addr, len, hash))
338 0 : return -1;
339 209 : os_memcpy(master_key, hash, 16);
340 209 : return 0;
341 : }
342 :
343 :
344 : /**
345 : * get_asymetric_start_key - GetAsymetricStartKey() - RFC 3079, Sect. 3.4
346 : * @master_key: 16-octet MasterKey (IN)
347 : * @session_key: 8-to-16 octet SessionKey (OUT)
348 : * @session_key_len: SessionKeyLength (Length of session_key) (IN)
349 : * @is_send: IsSend (IN, BOOLEAN)
350 : * @is_server: IsServer (IN, BOOLEAN)
351 : * Returns: 0 on success, -1 on failure
352 : */
353 141 : int get_asymetric_start_key(const u8 *master_key, u8 *session_key,
354 : size_t session_key_len, int is_send,
355 : int is_server)
356 : {
357 : static const u8 magic2[84] = {
358 : 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69,
359 : 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20,
360 : 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
361 : 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20, 0x6b, 0x65, 0x79,
362 : 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x73,
363 : 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73, 0x69, 0x64, 0x65,
364 : 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
365 : 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20,
366 : 0x6b, 0x65, 0x79, 0x2e
367 : };
368 : static const u8 magic3[84] = {
369 : 0x4f, 0x6e, 0x20, 0x74, 0x68, 0x65, 0x20, 0x63, 0x6c, 0x69,
370 : 0x65, 0x6e, 0x74, 0x20, 0x73, 0x69, 0x64, 0x65, 0x2c, 0x20,
371 : 0x74, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x74, 0x68,
372 : 0x65, 0x20, 0x72, 0x65, 0x63, 0x65, 0x69, 0x76, 0x65, 0x20,
373 : 0x6b, 0x65, 0x79, 0x3b, 0x20, 0x6f, 0x6e, 0x20, 0x74, 0x68,
374 : 0x65, 0x20, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x20, 0x73,
375 : 0x69, 0x64, 0x65, 0x2c, 0x20, 0x69, 0x74, 0x20, 0x69, 0x73,
376 : 0x20, 0x74, 0x68, 0x65, 0x20, 0x73, 0x65, 0x6e, 0x64, 0x20,
377 : 0x6b, 0x65, 0x79, 0x2e
378 : };
379 : static const u8 shs_pad1[40] = {
380 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
381 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
382 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
383 : 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
384 : };
385 :
386 : static const u8 shs_pad2[40] = {
387 : 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
388 : 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
389 : 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2,
390 : 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2, 0xf2
391 : };
392 : u8 digest[SHA1_MAC_LEN];
393 : const unsigned char *addr[4];
394 141 : const size_t len[4] = { 16, 40, 84, 40 };
395 :
396 141 : addr[0] = master_key;
397 141 : addr[1] = shs_pad1;
398 141 : if (is_send) {
399 71 : addr[2] = is_server ? magic3 : magic2;
400 : } else {
401 70 : addr[2] = is_server ? magic2 : magic3;
402 : }
403 141 : addr[3] = shs_pad2;
404 :
405 141 : if (sha1_vector(4, addr, len, digest))
406 0 : return -1;
407 :
408 141 : if (session_key_len > SHA1_MAC_LEN)
409 0 : session_key_len = SHA1_MAC_LEN;
410 141 : os_memcpy(session_key, digest, session_key_len);
411 141 : return 0;
412 : }
413 :
414 :
415 : #ifndef CONFIG_NO_RC4
416 :
417 : #define PWBLOCK_LEN 516
418 :
419 : /**
420 : * encrypt_pw_block_with_password_hash - EncryptPwBlockWithPasswordHash() - RFC 2759, Sect. 8.10
421 : * @password: 0-to-256-unicode-char Password (IN; UTF-8)
422 : * @password_len: Length of password
423 : * @password_hash: 16-octet PasswordHash (IN)
424 : * @pw_block: 516-byte PwBlock (OUT)
425 : * Returns: 0 on success, -1 on failure
426 : */
427 0 : int encrypt_pw_block_with_password_hash(
428 : const u8 *password, size_t password_len,
429 : const u8 *password_hash, u8 *pw_block)
430 : {
431 : size_t ucs2_len, offset;
432 : u8 *pos;
433 :
434 0 : os_memset(pw_block, 0, PWBLOCK_LEN);
435 :
436 0 : if (utf8_to_ucs2(password, password_len, pw_block, 512, &ucs2_len) < 0
437 0 : || ucs2_len > 256)
438 0 : return -1;
439 :
440 0 : offset = (256 - ucs2_len) * 2;
441 0 : if (offset != 0) {
442 0 : os_memmove(pw_block + offset, pw_block, ucs2_len * 2);
443 0 : if (os_get_random(pw_block, offset) < 0)
444 0 : return -1;
445 : }
446 : /*
447 : * PasswordLength is 4 octets, but since the maximum password length is
448 : * 256, only first two (in little endian byte order) can be non-zero.
449 : */
450 0 : pos = &pw_block[2 * 256];
451 0 : WPA_PUT_LE16(pos, password_len * 2);
452 0 : rc4_skip(password_hash, 16, 0, pw_block, PWBLOCK_LEN);
453 0 : return 0;
454 : }
455 :
456 :
457 : /**
458 : * new_password_encrypted_with_old_nt_password_hash - NewPasswordEncryptedWithOldNtPasswordHash() - RFC 2759, Sect. 8.9
459 : * @new_password: 0-to-256-unicode-char NewPassword (IN; UTF-8)
460 : * @new_password_len: Length of new_password
461 : * @old_password: 0-to-256-unicode-char OldPassword (IN; UTF-8)
462 : * @old_password_len: Length of old_password
463 : * @encrypted_pw_block: 516-octet EncryptedPwBlock (OUT)
464 : * Returns: 0 on success, -1 on failure
465 : */
466 0 : int new_password_encrypted_with_old_nt_password_hash(
467 : const u8 *new_password, size_t new_password_len,
468 : const u8 *old_password, size_t old_password_len,
469 : u8 *encrypted_pw_block)
470 : {
471 : u8 password_hash[16];
472 :
473 0 : if (nt_password_hash(old_password, old_password_len, password_hash))
474 0 : return -1;
475 0 : if (encrypt_pw_block_with_password_hash(new_password, new_password_len,
476 : password_hash,
477 : encrypted_pw_block))
478 0 : return -1;
479 0 : return 0;
480 : }
481 :
482 : #endif /* CONFIG_NO_RC4 */
483 :
484 :
485 : /**
486 : * nt_password_hash_encrypted_with_block - NtPasswordHashEncryptedWithBlock() - RFC 2759, Sect 8.13
487 : * @password_hash: 16-octer PasswordHash (IN)
488 : * @block: 16-octet Block (IN)
489 : * @cypher: 16-octer Cypher (OUT)
490 : */
491 0 : void nt_password_hash_encrypted_with_block(const u8 *password_hash,
492 : const u8 *block, u8 *cypher)
493 : {
494 0 : des_encrypt(password_hash, block, cypher);
495 0 : des_encrypt(password_hash + 8, block + 7, cypher + 8);
496 0 : }
497 :
498 :
499 : /**
500 : * old_nt_password_hash_encrypted_with_new_nt_password_hash - OldNtPasswordHashEncryptedWithNewNtPasswordHash() - RFC 2759, Sect. 8.12
501 : * @new_password: 0-to-256-unicode-char NewPassword (IN; UTF-8)
502 : * @new_password_len: Length of new_password
503 : * @old_password: 0-to-256-unicode-char OldPassword (IN; UTF-8)
504 : * @old_password_len: Length of old_password
505 : * @encrypted_password_hash: 16-octet EncryptedPasswordHash (OUT)
506 : * Returns: 0 on success, -1 on failure
507 : */
508 0 : int old_nt_password_hash_encrypted_with_new_nt_password_hash(
509 : const u8 *new_password, size_t new_password_len,
510 : const u8 *old_password, size_t old_password_len,
511 : u8 *encrypted_password_hash)
512 : {
513 : u8 old_password_hash[16], new_password_hash[16];
514 :
515 0 : if (nt_password_hash(old_password, old_password_len,
516 0 : old_password_hash) ||
517 0 : nt_password_hash(new_password, new_password_len,
518 : new_password_hash))
519 0 : return -1;
520 0 : nt_password_hash_encrypted_with_block(old_password_hash,
521 : new_password_hash,
522 : encrypted_password_hash);
523 0 : return 0;
524 : }
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