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Commit | Line | Data |
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790fe579 | 1 | /* |
1da177e4 LT |
2 | Unix SMB/Netbios implementation. |
3 | Version 1.9. | |
4 | SMB parameters and setup | |
5 | Copyright (C) Andrew Tridgell 1992-2000 | |
6 | Copyright (C) Luke Kenneth Casson Leighton 1996-2000 | |
7 | Modified by Jeremy Allison 1995. | |
8 | Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003 | |
9 | Modified by Steve French (sfrench@us.ibm.com) 2002-2003 | |
50c2f753 | 10 | |
1da177e4 LT |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
50c2f753 | 15 | |
1da177e4 LT |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
50c2f753 | 20 | |
1da177e4 LT |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
5a0e3ad6 | 27 | #include <linux/slab.h> |
1da177e4 LT |
28 | #include <linux/fs.h> |
29 | #include <linux/string.h> | |
30 | #include <linux/kernel.h> | |
31 | #include <linux/random.h> | |
32 | #include "cifs_unicode.h" | |
33 | #include "cifspdu.h" | |
3979877e | 34 | #include "cifsglob.h" |
1da177e4 | 35 | #include "cifs_debug.h" |
ee2c9258 | 36 | #include "cifsproto.h" |
1da177e4 | 37 | |
4b18f2a9 SF |
38 | #ifndef false |
39 | #define false 0 | |
1da177e4 | 40 | #endif |
4b18f2a9 SF |
41 | #ifndef true |
42 | #define true 1 | |
1da177e4 LT |
43 | #endif |
44 | ||
45 | /* following came from the other byteorder.h to avoid include conflicts */ | |
46 | #define CVAL(buf,pos) (((unsigned char *)(buf))[pos]) | |
47 | #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8) | |
48 | #define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val))) | |
49 | ||
ee2c9258 SP |
50 | /* produce a md4 message digest from data of length n bytes */ |
51 | int | |
52 | mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len) | |
53 | { | |
54 | int rc; | |
55 | unsigned int size; | |
56 | struct crypto_shash *md4; | |
57 | struct sdesc *sdescmd4; | |
58 | ||
59 | md4 = crypto_alloc_shash("md4", 0, 0); | |
60 | if (IS_ERR(md4)) { | |
ffeb414a | 61 | rc = PTR_ERR(md4); |
ee2c9258 | 62 | cERROR(1, "%s: Crypto md4 allocation error %d\n", __func__, rc); |
ffeb414a | 63 | return rc; |
ee2c9258 SP |
64 | } |
65 | size = sizeof(struct shash_desc) + crypto_shash_descsize(md4); | |
66 | sdescmd4 = kmalloc(size, GFP_KERNEL); | |
67 | if (!sdescmd4) { | |
68 | rc = -ENOMEM; | |
69 | cERROR(1, "%s: Memory allocation failure\n", __func__); | |
70 | goto mdfour_err; | |
71 | } | |
72 | sdescmd4->shash.tfm = md4; | |
73 | sdescmd4->shash.flags = 0x0; | |
74 | ||
75 | rc = crypto_shash_init(&sdescmd4->shash); | |
76 | if (rc) { | |
77 | cERROR(1, "%s: Could not init md4 shash\n", __func__); | |
78 | goto mdfour_err; | |
79 | } | |
80 | crypto_shash_update(&sdescmd4->shash, link_str, link_len); | |
81 | rc = crypto_shash_final(&sdescmd4->shash, md4_hash); | |
1da177e4 | 82 | |
ee2c9258 SP |
83 | mdfour_err: |
84 | crypto_free_shash(md4); | |
85 | kfree(sdescmd4); | |
86 | ||
87 | return rc; | |
88 | } | |
89 | ||
90 | /* Does the des encryption from the NT or LM MD4 hash. */ | |
91 | static void | |
92 | SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8, | |
93 | unsigned char p24[24]) | |
94 | { | |
95 | unsigned char p21[21]; | |
96 | ||
97 | memset(p21, '\0', 21); | |
98 | ||
99 | memcpy(p21, passwd, 16); | |
100 | E_P24(p21, c8, p24); | |
101 | } | |
1da177e4 LT |
102 | |
103 | /* | |
104 | This implements the X/Open SMB password encryption | |
790fe579 | 105 | It takes a password, a 8 byte "crypt key" and puts 24 bytes of |
1da177e4 LT |
106 | encrypted password into p24 */ |
107 | /* Note that password must be uppercased and null terminated */ | |
108 | void | |
4e53a3fb | 109 | SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24) |
1da177e4 LT |
110 | { |
111 | unsigned char p14[15], p21[21]; | |
112 | ||
113 | memset(p21, '\0', 21); | |
114 | memset(p14, '\0', 14); | |
115 | strncpy((char *) p14, (char *) passwd, 14); | |
116 | ||
117 | /* strupper((char *)p14); *//* BB at least uppercase the easy range */ | |
118 | E_P16(p14, p21); | |
119 | ||
120 | SMBOWFencrypt(p21, c8, p24); | |
50c2f753 | 121 | |
790fe579 SF |
122 | memset(p14, 0, 15); |
123 | memset(p21, 0, 21); | |
1da177e4 LT |
124 | } |
125 | ||
126 | /* Routines for Windows NT MD4 Hash functions. */ | |
127 | static int | |
63d2583f | 128 | _my_wcslen(__u16 *str) |
1da177e4 LT |
129 | { |
130 | int len = 0; | |
131 | while (*str++ != 0) | |
132 | len++; | |
133 | return len; | |
134 | } | |
135 | ||
136 | /* | |
137 | * Convert a string into an NT UNICODE string. | |
790fe579 | 138 | * Note that regardless of processor type |
1da177e4 LT |
139 | * this must be in intel (little-endian) |
140 | * format. | |
141 | */ | |
142 | ||
143 | static int | |
63d2583f | 144 | _my_mbstowcs(__u16 *dst, const unsigned char *src, int len) |
790fe579 | 145 | { /* BB not a very good conversion routine - change/fix */ |
1da177e4 LT |
146 | int i; |
147 | __u16 val; | |
148 | ||
149 | for (i = 0; i < len; i++) { | |
150 | val = *src; | |
151 | SSVAL(dst, 0, val); | |
152 | dst++; | |
153 | src++; | |
154 | if (val == 0) | |
155 | break; | |
156 | } | |
157 | return i; | |
158 | } | |
159 | ||
790fe579 | 160 | /* |
1da177e4 LT |
161 | * Creates the MD4 Hash of the users password in NT UNICODE. |
162 | */ | |
163 | ||
ee2c9258 | 164 | int |
1da177e4 LT |
165 | E_md4hash(const unsigned char *passwd, unsigned char *p16) |
166 | { | |
ee2c9258 | 167 | int rc; |
1da177e4 LT |
168 | int len; |
169 | __u16 wpwd[129]; | |
170 | ||
171 | /* Password cannot be longer than 128 characters */ | |
790fe579 | 172 | if (passwd) { |
1da177e4 | 173 | len = strlen((char *) passwd); |
63d2583f | 174 | if (len > 128) |
1da177e4 | 175 | len = 128; |
63d2583f | 176 | |
1da177e4 LT |
177 | /* Password must be converted to NT unicode */ |
178 | _my_mbstowcs(wpwd, passwd, len); | |
179 | } else | |
180 | len = 0; | |
181 | ||
182 | wpwd[len] = 0; /* Ensure string is null terminated */ | |
183 | /* Calculate length in bytes */ | |
630f3f0c | 184 | len = _my_wcslen(wpwd) * sizeof(__u16); |
1da177e4 | 185 | |
ee2c9258 | 186 | rc = mdfour(p16, (unsigned char *) wpwd, len); |
790fe579 | 187 | memset(wpwd, 0, 129 * 2); |
ee2c9258 SP |
188 | |
189 | return rc; | |
1da177e4 LT |
190 | } |
191 | ||
e10847ed | 192 | #if 0 /* currently unused */ |
1da177e4 | 193 | /* Does both the NT and LM owfs of a user's password */ |
2cd646a2 | 194 | static void |
1da177e4 LT |
195 | nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16]) |
196 | { | |
197 | char passwd[514]; | |
198 | ||
199 | memset(passwd, '\0', 514); | |
200 | if (strlen(pwd) < 513) | |
201 | strcpy(passwd, pwd); | |
202 | else | |
203 | memcpy(passwd, pwd, 512); | |
204 | /* Calculate the MD4 hash (NT compatible) of the password */ | |
205 | memset(nt_p16, '\0', 16); | |
206 | E_md4hash(passwd, nt_p16); | |
207 | ||
208 | /* Mangle the passwords into Lanman format */ | |
209 | passwd[14] = '\0'; | |
210 | /* strupper(passwd); */ | |
211 | ||
212 | /* Calculate the SMB (lanman) hash functions of the password */ | |
213 | ||
214 | memset(p16, '\0', 16); | |
215 | E_P16((unsigned char *) passwd, (unsigned char *) p16); | |
216 | ||
217 | /* clear out local copy of user's password (just being paranoid). */ | |
630f3f0c | 218 | memset(passwd, '\0', sizeof(passwd)); |
1da177e4 | 219 | } |
e10847ed | 220 | #endif |
1da177e4 LT |
221 | |
222 | /* Does the NTLMv2 owfs of a user's password */ | |
223 | #if 0 /* function not needed yet - but will be soon */ | |
224 | static void | |
225 | ntv2_owf_gen(const unsigned char owf[16], const char *user_n, | |
226 | const char *domain_n, unsigned char kr_buf[16], | |
227 | const struct nls_table *nls_codepage) | |
228 | { | |
50c2f753 SF |
229 | wchar_t *user_u; |
230 | wchar_t *dom_u; | |
1da177e4 LT |
231 | int user_l, domain_l; |
232 | struct HMACMD5Context ctx; | |
233 | ||
234 | /* might as well do one alloc to hold both (user_u and dom_u) */ | |
790fe579 SF |
235 | user_u = kmalloc(2048 * sizeof(wchar_t), GFP_KERNEL); |
236 | if (user_u == NULL) | |
1da177e4 LT |
237 | return; |
238 | dom_u = user_u + 1024; | |
50c2f753 | 239 | |
63d2583f SF |
240 | /* push_ucs2(NULL, user_u, user_n, (user_l+1)*2, |
241 | STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); | |
242 | push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2, | |
243 | STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */ | |
1da177e4 LT |
244 | |
245 | /* BB user and domain may need to be uppercased */ | |
246 | user_l = cifs_strtoUCS(user_u, user_n, 511, nls_codepage); | |
247 | domain_l = cifs_strtoUCS(dom_u, domain_n, 511, nls_codepage); | |
248 | ||
249 | user_l++; /* trailing null */ | |
250 | domain_l++; | |
251 | ||
252 | hmac_md5_init_limK_to_64(owf, 16, &ctx); | |
253 | hmac_md5_update((const unsigned char *) user_u, user_l * 2, &ctx); | |
254 | hmac_md5_update((const unsigned char *) dom_u, domain_l * 2, &ctx); | |
255 | hmac_md5_final(kr_buf, &ctx); | |
256 | ||
257 | kfree(user_u); | |
258 | } | |
790fe579 | 259 | #endif |
1da177e4 | 260 | |
1da177e4 | 261 | /* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */ |
e10847ed | 262 | #if 0 /* currently unused */ |
2cd646a2 | 263 | static void |
1da177e4 LT |
264 | NTLMSSPOWFencrypt(unsigned char passwd[8], |
265 | unsigned char *ntlmchalresp, unsigned char p24[24]) | |
266 | { | |
267 | unsigned char p21[21]; | |
268 | ||
269 | memset(p21, '\0', 21); | |
270 | memcpy(p21, passwd, 8); | |
271 | memset(p21 + 8, 0xbd, 8); | |
272 | ||
273 | E_P24(p21, ntlmchalresp, p24); | |
274 | } | |
e10847ed | 275 | #endif |
1da177e4 LT |
276 | |
277 | /* Does the NT MD4 hash then des encryption. */ | |
ee2c9258 | 278 | int |
1da177e4 LT |
279 | SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24) |
280 | { | |
ee2c9258 | 281 | int rc; |
1da177e4 LT |
282 | unsigned char p21[21]; |
283 | ||
284 | memset(p21, '\0', 21); | |
285 | ||
ee2c9258 SP |
286 | rc = E_md4hash(passwd, p21); |
287 | if (rc) { | |
288 | cFYI(1, "%s Can't generate NT hash, error: %d", __func__, rc); | |
289 | return rc; | |
290 | } | |
1da177e4 | 291 | SMBOWFencrypt(p21, c8, p24); |
ee2c9258 | 292 | return rc; |
1da177e4 LT |
293 | } |
294 | ||
295 | ||
296 | /* Does the md5 encryption from the NT hash for NTLMv2. */ | |
297 | /* These routines will be needed later */ | |
298 | #if 0 | |
299 | static void | |
300 | SMBOWFencrypt_ntv2(const unsigned char kr[16], | |
790fe579 SF |
301 | const struct data_blob *srv_chal, |
302 | const struct data_blob *cli_chal, unsigned char resp_buf[16]) | |
1da177e4 | 303 | { |
790fe579 | 304 | struct HMACMD5Context ctx; |
1da177e4 | 305 | |
790fe579 SF |
306 | hmac_md5_init_limK_to_64(kr, 16, &ctx); |
307 | hmac_md5_update(srv_chal->data, srv_chal->length, &ctx); | |
308 | hmac_md5_update(cli_chal->data, cli_chal->length, &ctx); | |
309 | hmac_md5_final(resp_buf, &ctx); | |
1da177e4 LT |
310 | } |
311 | ||
312 | static void | |
313 | SMBsesskeygen_ntv2(const unsigned char kr[16], | |
314 | const unsigned char *nt_resp, __u8 sess_key[16]) | |
315 | { | |
316 | struct HMACMD5Context ctx; | |
317 | ||
318 | hmac_md5_init_limK_to_64(kr, 16, &ctx); | |
319 | hmac_md5_update(nt_resp, 16, &ctx); | |
320 | hmac_md5_final((unsigned char *) sess_key, &ctx); | |
321 | } | |
322 | ||
323 | static void | |
324 | SMBsesskeygen_ntv1(const unsigned char kr[16], | |
325 | const unsigned char *nt_resp, __u8 sess_key[16]) | |
326 | { | |
327 | mdfour((unsigned char *) sess_key, (unsigned char *) kr, 16); | |
328 | } | |
329 | #endif |