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>
28 #include <linux/string.h>
29 #include <linux/kernel.h>
30 #include <linux/random.h>
31 #include "cifs_unicode.h"
35 #include "cifs_debug.h"
36 #include "cifsencrypt.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 /*The following definitions come from libsmb/smbencrypt.c */
52 void SMBencrypt(unsigned char *passwd
, unsigned char *c8
, unsigned char *p24
);
53 void E_md4hash(const unsigned char *passwd
, unsigned char *p16
);
54 static void SMBOWFencrypt(unsigned char passwd
[16], unsigned char *c8
,
55 unsigned char p24
[24]);
56 void SMBNTencrypt(unsigned char *passwd
, unsigned char *c8
, unsigned char *p24
);
59 This implements the X/Open SMB password encryption
60 It takes a password, a 8 byte "crypt key" and puts 24 bytes of
61 encrypted password into p24 */
62 /* Note that password must be uppercased and null terminated */
64 SMBencrypt(unsigned char *passwd
, unsigned char *c8
, unsigned char *p24
)
66 unsigned char p14
[15], p21
[21];
68 memset(p21
, '\0', 21);
69 memset(p14
, '\0', 14);
70 strncpy((char *) p14
, (char *) passwd
, 14);
72 /* strupper((char *)p14); *//* BB at least uppercase the easy range */
75 SMBOWFencrypt(p21
, c8
, p24
);
81 /* Routines for Windows NT MD4 Hash functions. */
83 _my_wcslen(__u16
*str
)
92 * Convert a string into an NT UNICODE string.
93 * Note that regardless of processor type
94 * this must be in intel (little-endian)
99 _my_mbstowcs(__u16
*dst
, const unsigned char *src
, int len
)
100 { /* BB not a very good conversion routine - change/fix */
104 for (i
= 0; i
< len
; i
++) {
116 * Creates the MD4 Hash of the users password in NT UNICODE.
120 E_md4hash(const unsigned char *passwd
, unsigned char *p16
)
125 /* Password cannot be longer than 128 characters */
127 len
= strlen((char *) passwd
);
131 /* Password must be converted to NT unicode */
132 _my_mbstowcs(wpwd
, passwd
, len
);
136 wpwd
[len
] = 0; /* Ensure string is null terminated */
137 /* Calculate length in bytes */
138 len
= _my_wcslen(wpwd
) * sizeof(__u16
);
140 mdfour(p16
, (unsigned char *) wpwd
, len
);
141 memset(wpwd
, 0, 129 * 2);
144 #if 0 /* currently unused */
145 /* Does both the NT and LM owfs of a user's password */
147 nt_lm_owf_gen(char *pwd
, unsigned char nt_p16
[16], unsigned char p16
[16])
151 memset(passwd
, '\0', 514);
152 if (strlen(pwd
) < 513)
155 memcpy(passwd
, pwd
, 512);
156 /* Calculate the MD4 hash (NT compatible) of the password */
157 memset(nt_p16
, '\0', 16);
158 E_md4hash(passwd
, nt_p16
);
160 /* Mangle the passwords into Lanman format */
162 /* strupper(passwd); */
164 /* Calculate the SMB (lanman) hash functions of the password */
166 memset(p16
, '\0', 16);
167 E_P16((unsigned char *) passwd
, (unsigned char *) p16
);
169 /* clear out local copy of user's password (just being paranoid). */
170 memset(passwd
, '\0', sizeof(passwd
));
174 /* Does the NTLMv2 owfs of a user's password */
175 #if 0 /* function not needed yet - but will be soon */
177 ntv2_owf_gen(const unsigned char owf
[16], const char *user_n
,
178 const char *domain_n
, unsigned char kr_buf
[16],
179 const struct nls_table
*nls_codepage
)
183 int user_l
, domain_l
;
184 struct HMACMD5Context ctx
;
186 /* might as well do one alloc to hold both (user_u and dom_u) */
187 user_u
= kmalloc(2048 * sizeof(wchar_t), GFP_KERNEL
);
190 dom_u
= user_u
+ 1024;
192 /* push_ucs2(NULL, user_u, user_n, (user_l+1)*2,
193 STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
194 push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2,
195 STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */
197 /* BB user and domain may need to be uppercased */
198 user_l
= cifs_strtoUCS(user_u
, user_n
, 511, nls_codepage
);
199 domain_l
= cifs_strtoUCS(dom_u
, domain_n
, 511, nls_codepage
);
201 user_l
++; /* trailing null */
204 hmac_md5_init_limK_to_64(owf
, 16, &ctx
);
205 hmac_md5_update((const unsigned char *) user_u
, user_l
* 2, &ctx
);
206 hmac_md5_update((const unsigned char *) dom_u
, domain_l
* 2, &ctx
);
207 hmac_md5_final(kr_buf
, &ctx
);
213 /* Does the des encryption from the NT or LM MD4 hash. */
215 SMBOWFencrypt(unsigned char passwd
[16], unsigned char *c8
,
216 unsigned char p24
[24])
218 unsigned char p21
[21];
220 memset(p21
, '\0', 21);
222 memcpy(p21
, passwd
, 16);
226 /* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
227 #if 0 /* currently unused */
229 NTLMSSPOWFencrypt(unsigned char passwd
[8],
230 unsigned char *ntlmchalresp
, unsigned char p24
[24])
232 unsigned char p21
[21];
234 memset(p21
, '\0', 21);
235 memcpy(p21
, passwd
, 8);
236 memset(p21
+ 8, 0xbd, 8);
238 E_P24(p21
, ntlmchalresp
, p24
);
242 /* Does the NT MD4 hash then des encryption. */
245 SMBNTencrypt(unsigned char *passwd
, unsigned char *c8
, unsigned char *p24
)
247 unsigned char p21
[21];
249 memset(p21
, '\0', 21);
251 E_md4hash(passwd
, p21
);
252 SMBOWFencrypt(p21
, c8
, p24
);
256 /* Does the md5 encryption from the NT hash for NTLMv2. */
257 /* These routines will be needed later */
260 SMBOWFencrypt_ntv2(const unsigned char kr
[16],
261 const struct data_blob
*srv_chal
,
262 const struct data_blob
*cli_chal
, unsigned char resp_buf
[16])
264 struct HMACMD5Context ctx
;
266 hmac_md5_init_limK_to_64(kr
, 16, &ctx
);
267 hmac_md5_update(srv_chal
->data
, srv_chal
->length
, &ctx
);
268 hmac_md5_update(cli_chal
->data
, cli_chal
->length
, &ctx
);
269 hmac_md5_final(resp_buf
, &ctx
);
273 SMBsesskeygen_ntv2(const unsigned char kr
[16],
274 const unsigned char *nt_resp
, __u8 sess_key
[16])
276 struct HMACMD5Context ctx
;
278 hmac_md5_init_limK_to_64(kr
, 16, &ctx
);
279 hmac_md5_update(nt_resp
, 16, &ctx
);
280 hmac_md5_final((unsigned char *) sess_key
, &ctx
);
284 SMBsesskeygen_ntv1(const unsigned char kr
[16],
285 const unsigned char *nt_resp
, __u8 sess_key
[16])
287 mdfour((unsigned char *) sess_key
, (unsigned char *) kr
, 16);
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