2 Unix SMB/Netbios implementation.
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
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.
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.
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.
26 #include <linux/module.h>
27 #include <linux/slab.h>
29 #include <linux/string.h>
30 #include <linux/kernel.h>
31 #include <linux/random.h>
32 #include "cifs_unicode.h"
35 #include "cifs_debug.h"
36 #include "cifsproto.h"
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)))
50 /* produce a md4 message digest from data of length n bytes */
52 mdfour(unsigned char *md4_hash, unsigned char *link_str, int link_len)
56 struct crypto_shash *md4;
57 struct sdesc *sdescmd4;
59 md4 = crypto_alloc_shash("md4", 0, 0);
61 cERROR(1, "%s: Crypto md4 allocation error %d\n", __func__, rc);
64 size = sizeof(struct shash_desc) + crypto_shash_descsize(md4);
65 sdescmd4 = kmalloc(size, GFP_KERNEL);
68 cERROR(1, "%s: Memory allocation failure\n", __func__);
71 sdescmd4->shash.tfm = md4;
72 sdescmd4->shash.flags = 0x0;
74 rc = crypto_shash_init(&sdescmd4->shash);
76 cERROR(1, "%s: Could not init md4 shash\n", __func__);
79 crypto_shash_update(&sdescmd4->shash, link_str, link_len);
80 rc = crypto_shash_final(&sdescmd4->shash, md4_hash);
83 crypto_free_shash(md4);
89 /* Does the des encryption from the NT or LM MD4 hash. */
91 SMBOWFencrypt(unsigned char passwd[16], const unsigned char *c8,
92 unsigned char p24[24])
94 unsigned char p21[21];
96 memset(p21, '\0', 21);
98 memcpy(p21, passwd, 16);
103 This implements the X/Open SMB password encryption
104 It takes a password, a 8 byte "crypt key" and puts 24 bytes of
105 encrypted password into p24 */
106 /* Note that password must be uppercased and null terminated */
108 SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24)
110 unsigned char p14[15], p21[21];
112 memset(p21, '\0', 21);
113 memset(p14, '\0', 14);
114 strncpy((char *) p14, (char *) passwd, 14);
116 /* strupper((char *)p14); *//* BB at least uppercase the easy range */
119 SMBOWFencrypt(p21, c8, p24);
125 /* Routines for Windows NT MD4 Hash functions. */
127 _my_wcslen(__u16 *str)
136 * Convert a string into an NT UNICODE string.
137 * Note that regardless of processor type
138 * this must be in intel (little-endian)
143 _my_mbstowcs(__u16 *dst, const unsigned char *src, int len)
144 { /* BB not a very good conversion routine - change/fix */
148 for (i = 0; i < len; i++) {
160 * Creates the MD4 Hash of the users password in NT UNICODE.
164 E_md4hash(const unsigned char *passwd, unsigned char *p16)
170 /* Password cannot be longer than 128 characters */
172 len = strlen((char *) passwd);
176 /* Password must be converted to NT unicode */
177 _my_mbstowcs(wpwd, passwd, len);
181 wpwd[len] = 0; /* Ensure string is null terminated */
182 /* Calculate length in bytes */
183 len = _my_wcslen(wpwd) * sizeof(__u16);
185 rc = mdfour(p16, (unsigned char *) wpwd, len);
186 memset(wpwd, 0, 129 * 2);
191 #if 0 /* currently unused */
192 /* Does both the NT and LM owfs of a user's password */
194 nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16])
198 memset(passwd, '\0', 514);
199 if (strlen(pwd) < 513)
202 memcpy(passwd, pwd, 512);
203 /* Calculate the MD4 hash (NT compatible) of the password */
204 memset(nt_p16, '\0', 16);
205 E_md4hash(passwd, nt_p16);
207 /* Mangle the passwords into Lanman format */
209 /* strupper(passwd); */
211 /* Calculate the SMB (lanman) hash functions of the password */
213 memset(p16, '\0', 16);
214 E_P16((unsigned char *) passwd, (unsigned char *) p16);
216 /* clear out local copy of user's password (just being paranoid). */
217 memset(passwd, '\0', sizeof(passwd));
221 /* Does the NTLMv2 owfs of a user's password */
222 #if 0 /* function not needed yet - but will be soon */
224 ntv2_owf_gen(const unsigned char owf[16], const char *user_n,
225 const char *domain_n, unsigned char kr_buf[16],
226 const struct nls_table *nls_codepage)
230 int user_l, domain_l;
231 struct HMACMD5Context ctx;
233 /* might as well do one alloc to hold both (user_u and dom_u) */
234 user_u = kmalloc(2048 * sizeof(wchar_t), GFP_KERNEL);
237 dom_u = user_u + 1024;
239 /* push_ucs2(NULL, user_u, user_n, (user_l+1)*2,
240 STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
241 push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2,
242 STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */
244 /* BB user and domain may need to be uppercased */
245 user_l = cifs_strtoUCS(user_u, user_n, 511, nls_codepage);
246 domain_l = cifs_strtoUCS(dom_u, domain_n, 511, nls_codepage);
248 user_l++; /* trailing null */
251 hmac_md5_init_limK_to_64(owf, 16, &ctx);
252 hmac_md5_update((const unsigned char *) user_u, user_l * 2, &ctx);
253 hmac_md5_update((const unsigned char *) dom_u, domain_l * 2, &ctx);
254 hmac_md5_final(kr_buf, &ctx);
260 /* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
261 #if 0 /* currently unused */
263 NTLMSSPOWFencrypt(unsigned char passwd[8],
264 unsigned char *ntlmchalresp, unsigned char p24[24])
266 unsigned char p21[21];
268 memset(p21, '\0', 21);
269 memcpy(p21, passwd, 8);
270 memset(p21 + 8, 0xbd, 8);
272 E_P24(p21, ntlmchalresp, p24);
276 /* Does the NT MD4 hash then des encryption. */
278 SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
281 unsigned char p21[21];
283 memset(p21, '\0', 21);
285 rc = E_md4hash(passwd, p21);
287 cFYI(1, "%s Can't generate NT hash, error: %d", __func__, rc);
290 SMBOWFencrypt(p21, c8, p24);
295 /* Does the md5 encryption from the NT hash for NTLMv2. */
296 /* These routines will be needed later */
299 SMBOWFencrypt_ntv2(const unsigned char kr[16],
300 const struct data_blob *srv_chal,
301 const struct data_blob *cli_chal, unsigned char resp_buf[16])
303 struct HMACMD5Context ctx;
305 hmac_md5_init_limK_to_64(kr, 16, &ctx);
306 hmac_md5_update(srv_chal->data, srv_chal->length, &ctx);
307 hmac_md5_update(cli_chal->data, cli_chal->length, &ctx);
308 hmac_md5_final(resp_buf, &ctx);
312 SMBsesskeygen_ntv2(const unsigned char kr[16],
313 const unsigned char *nt_resp, __u8 sess_key[16])
315 struct HMACMD5Context ctx;
317 hmac_md5_init_limK_to_64(kr, 16, &ctx);
318 hmac_md5_update(nt_resp, 16, &ctx);
319 hmac_md5_final((unsigned char *) sess_key, &ctx);
323 SMBsesskeygen_ntv1(const unsigned char kr[16],
324 const unsigned char *nt_resp, __u8 sess_key[16])
326 mdfour((unsigned char *) sess_key, (unsigned char *) kr, 16);