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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
10
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.
15
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.
20
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>
27#include <linux/fs.h>
28#include <linux/string.h>
29#include <linux/kernel.h>
30#include <linux/random.h>
31#include "cifs_unicode.h"
32#include "cifspdu.h"
Steve French39798772006-05-31 22:40:51 +000033#include "cifsglob.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "md5.h"
35#include "cifs_debug.h"
36#include "cifsencrypt.h"
37
38#ifndef FALSE
39#define FALSE 0
40#endif
41#ifndef TRUE
42#define TRUE 1
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
50/*The following definitions come from libsmb/smbencrypt.c */
51
52void SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
53void E_md4hash(const unsigned char *passwd, unsigned char *p16);
Linus Torvalds1da177e2005-04-16 15:20:36 -070054static void SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
55 unsigned char p24[24]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070056void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
57
58/*
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 */
63void
64SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
65{
66 unsigned char p14[15], p21[21];
67
68 memset(p21, '\0', 21);
69 memset(p14, '\0', 14);
70 strncpy((char *) p14, (char *) passwd, 14);
71
72/* strupper((char *)p14); *//* BB at least uppercase the easy range */
73 E_P16(p14, p21);
74
75 SMBOWFencrypt(p21, c8, p24);
76
77 memset(p14,0,15);
78 memset(p21,0,21);
79}
80
81/* Routines for Windows NT MD4 Hash functions. */
82static int
83_my_wcslen(__u16 * str)
84{
85 int len = 0;
86 while (*str++ != 0)
87 len++;
88 return len;
89}
90
91/*
92 * Convert a string into an NT UNICODE string.
93 * Note that regardless of processor type
94 * this must be in intel (little-endian)
95 * format.
96 */
97
98static int
99_my_mbstowcs(__u16 * dst, const unsigned char *src, int len)
100{ /* not a very good conversion routine - change/fix */
101 int i;
102 __u16 val;
103
104 for (i = 0; i < len; i++) {
105 val = *src;
106 SSVAL(dst, 0, val);
107 dst++;
108 src++;
109 if (val == 0)
110 break;
111 }
112 return i;
113}
114
115/*
116 * Creates the MD4 Hash of the users password in NT UNICODE.
117 */
118
119void
120E_md4hash(const unsigned char *passwd, unsigned char *p16)
121{
122 int len;
123 __u16 wpwd[129];
124
125 /* Password cannot be longer than 128 characters */
126 if(passwd) {
127 len = strlen((char *) passwd);
128 if (len > 128) {
129 len = 128;
130 }
131 /* Password must be converted to NT unicode */
132 _my_mbstowcs(wpwd, passwd, len);
133 } else
134 len = 0;
135
136 wpwd[len] = 0; /* Ensure string is null terminated */
137 /* Calculate length in bytes */
138 len = _my_wcslen(wpwd) * sizeof (__u16);
139
140 mdfour(p16, (unsigned char *) wpwd, len);
141 memset(wpwd,0,129 * 2);
142}
143
Steve Frenche10847e2006-09-28 20:49:01 +0000144#if 0 /* currently unused */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145/* Does both the NT and LM owfs of a user's password */
Steve French2cd646a2006-09-28 19:43:08 +0000146static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16])
148{
149 char passwd[514];
150
151 memset(passwd, '\0', 514);
152 if (strlen(pwd) < 513)
153 strcpy(passwd, pwd);
154 else
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);
159
160 /* Mangle the passwords into Lanman format */
161 passwd[14] = '\0';
162/* strupper(passwd); */
163
164 /* Calculate the SMB (lanman) hash functions of the password */
165
166 memset(p16, '\0', 16);
167 E_P16((unsigned char *) passwd, (unsigned char *) p16);
168
169 /* clear out local copy of user's password (just being paranoid). */
170 memset(passwd, '\0', sizeof (passwd));
171}
Steve Frenche10847e2006-09-28 20:49:01 +0000172#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174/* Does the NTLMv2 owfs of a user's password */
175#if 0 /* function not needed yet - but will be soon */
176static void
177ntv2_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)
180{
181 wchar_t * user_u;
182 wchar_t * dom_u;
183 int user_l, domain_l;
184 struct HMACMD5Context ctx;
185
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);
188 if(user_u == NULL)
189 return;
190 dom_u = user_u + 1024;
191
192 /* push_ucs2(NULL, user_u, user_n, (user_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
193 push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */
194
195 /* BB user and domain may need to be uppercased */
196 user_l = cifs_strtoUCS(user_u, user_n, 511, nls_codepage);
197 domain_l = cifs_strtoUCS(dom_u, domain_n, 511, nls_codepage);
198
199 user_l++; /* trailing null */
200 domain_l++;
201
202 hmac_md5_init_limK_to_64(owf, 16, &ctx);
203 hmac_md5_update((const unsigned char *) user_u, user_l * 2, &ctx);
204 hmac_md5_update((const unsigned char *) dom_u, domain_l * 2, &ctx);
205 hmac_md5_final(kr_buf, &ctx);
206
207 kfree(user_u);
208}
209#endif
210
211/* Does the des encryption from the NT or LM MD4 hash. */
212static void
213SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
214 unsigned char p24[24])
215{
216 unsigned char p21[21];
217
218 memset(p21, '\0', 21);
219
220 memcpy(p21, passwd, 16);
221 E_P24(p21, c8, p24);
222}
223
224/* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
Steve Frenche10847e2006-09-28 20:49:01 +0000225#if 0 /* currently unused */
Steve French2cd646a2006-09-28 19:43:08 +0000226static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227NTLMSSPOWFencrypt(unsigned char passwd[8],
228 unsigned char *ntlmchalresp, unsigned char p24[24])
229{
230 unsigned char p21[21];
231
232 memset(p21, '\0', 21);
233 memcpy(p21, passwd, 8);
234 memset(p21 + 8, 0xbd, 8);
235
236 E_P24(p21, ntlmchalresp, p24);
237}
Steve Frenche10847e2006-09-28 20:49:01 +0000238#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240/* Does the NT MD4 hash then des encryption. */
241
242void
243SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
244{
245 unsigned char p21[21];
246
247 memset(p21, '\0', 21);
248
249 E_md4hash(passwd, p21);
250 SMBOWFencrypt(p21, c8, p24);
251}
252
253
254/* Does the md5 encryption from the NT hash for NTLMv2. */
255/* These routines will be needed later */
256#if 0
257static void
258SMBOWFencrypt_ntv2(const unsigned char kr[16],
259 const struct data_blob * srv_chal,
260 const struct data_blob * cli_chal, unsigned char resp_buf[16])
261{
262 struct HMACMD5Context ctx;
263
264 hmac_md5_init_limK_to_64(kr, 16, &ctx);
265 hmac_md5_update(srv_chal->data, srv_chal->length, &ctx);
266 hmac_md5_update(cli_chal->data, cli_chal->length, &ctx);
267 hmac_md5_final(resp_buf, &ctx);
268}
269
270static void
271SMBsesskeygen_ntv2(const unsigned char kr[16],
272 const unsigned char *nt_resp, __u8 sess_key[16])
273{
274 struct HMACMD5Context ctx;
275
276 hmac_md5_init_limK_to_64(kr, 16, &ctx);
277 hmac_md5_update(nt_resp, 16, &ctx);
278 hmac_md5_final((unsigned char *) sess_key, &ctx);
279}
280
281static void
282SMBsesskeygen_ntv1(const unsigned char kr[16],
283 const unsigned char *nt_resp, __u8 sess_key[16])
284{
285 mdfour((unsigned char *) sess_key, (unsigned char *) kr, 16);
286}
287#endif