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"
34 #include "cifs_debug.h"
43 /* following came from the other byteorder.h to avoid include conflicts */
44 #define CVAL(buf,pos) (((unsigned char *)(buf))[pos])
45 #define SSVALX(buf,pos,val) (CVAL(buf,pos)=(val)&0xFF,CVAL(buf,pos+1)=(val)>>8)
46 #define SSVAL(buf,pos,val) SSVALX((buf),(pos),((__u16)(val)))
48 /*The following definitions come from lib/md4.c */
50 void mdfour(unsigned char *out, unsigned char *in, int n);
52 /*The following definitions come from libsmb/smbdes.c */
54 void E_P16(unsigned char *p14, unsigned char *p16);
55 void E_P24(unsigned char *p21, unsigned char *c8, unsigned char *p24);
56 void D_P16(unsigned char *p14, unsigned char *in, unsigned char *out);
57 void E_old_pw_hash(unsigned char *p14, unsigned char *in, unsigned char *out);
58 void cred_hash1(unsigned char *out, unsigned char *in, unsigned char *key);
59 void cred_hash2(unsigned char *out, unsigned char *in, unsigned char *key);
60 void cred_hash3(unsigned char *out, unsigned char *in, unsigned char *key,
63 /*The following definitions come from libsmb/smbencrypt.c */
65 void SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
66 void E_md4hash(const unsigned char *passwd, unsigned char *p16);
67 void nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16]);
68 void SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
69 unsigned char p24[24]);
70 void NTLMSSPOWFencrypt(unsigned char passwd[8],
71 unsigned char *ntlmchalresp, unsigned char p24[24]);
72 void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24);
73 int decode_pw_buffer(char in_buffer[516], char *new_pwrd,
74 int new_pwrd_size, __u32 * new_pw_len);
77 This implements the X/Open SMB password encryption
78 It takes a password, a 8 byte "crypt key" and puts 24 bytes of
79 encrypted password into p24 */
80 /* Note that password must be uppercased and null terminated */
82 SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
84 unsigned char p14[15], p21[21];
86 memset(p21, '\0', 21);
87 memset(p14, '\0', 14);
88 strncpy((char *) p14, (char *) passwd, 14);
90 /* strupper((char *)p14); *//* BB at least uppercase the easy range */
93 SMBOWFencrypt(p21, c8, p24);
99 /* Routines for Windows NT MD4 Hash functions. */
101 _my_wcslen(__u16 * str)
110 * Convert a string into an NT UNICODE string.
111 * Note that regardless of processor type
112 * this must be in intel (little-endian)
117 _my_mbstowcs(__u16 * dst, const unsigned char *src, int len)
118 { /* not a very good conversion routine - change/fix */
122 for (i = 0; i < len; i++) {
134 * Creates the MD4 Hash of the users password in NT UNICODE.
138 E_md4hash(const unsigned char *passwd, unsigned char *p16)
143 /* Password cannot be longer than 128 characters */
145 len = strlen((char *) passwd);
149 /* Password must be converted to NT unicode */
150 _my_mbstowcs(wpwd, passwd, len);
154 wpwd[len] = 0; /* Ensure string is null terminated */
155 /* Calculate length in bytes */
156 len = _my_wcslen(wpwd) * sizeof (__u16);
158 mdfour(p16, (unsigned char *) wpwd, len);
159 memset(wpwd,0,129 * 2);
162 /* Does both the NT and LM owfs of a user's password */
164 nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16])
168 memset(passwd, '\0', 514);
169 if (strlen(pwd) < 513)
172 memcpy(passwd, pwd, 512);
173 /* Calculate the MD4 hash (NT compatible) of the password */
174 memset(nt_p16, '\0', 16);
175 E_md4hash(passwd, nt_p16);
177 /* Mangle the passwords into Lanman format */
179 /* strupper(passwd); */
181 /* Calculate the SMB (lanman) hash functions of the password */
183 memset(p16, '\0', 16);
184 E_P16((unsigned char *) passwd, (unsigned char *) p16);
186 /* clear out local copy of user's password (just being paranoid). */
187 memset(passwd, '\0', sizeof (passwd));
190 /* Does the NTLMv2 owfs of a user's password */
192 ntv2_owf_gen(const unsigned char owf[16], const char *user_n,
193 const char *domain_n, unsigned char kr_buf[16],
194 const struct nls_table *nls_codepage)
198 int user_l, domain_l;
199 struct HMACMD5Context ctx;
201 /* might as well do one alloc to hold both (user_u and dom_u) */
202 user_u = kmalloc(2048 * sizeof(wchar_t),GFP_KERNEL);
205 dom_u = user_u + 1024;
207 /* push_ucs2(NULL, user_u, user_n, (user_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER);
208 push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */
210 /* BB user and domain may need to be uppercased */
211 user_l = cifs_strtoUCS(user_u, user_n, 511, nls_codepage);
212 domain_l = cifs_strtoUCS(dom_u, domain_n, 511, nls_codepage);
214 user_l++; /* trailing null */
217 hmac_md5_init_limK_to_64(owf, 16, &ctx);
218 hmac_md5_update((const unsigned char *) user_u, user_l * 2, &ctx);
219 hmac_md5_update((const unsigned char *) dom_u, domain_l * 2, &ctx);
220 hmac_md5_final(kr_buf, &ctx);
225 /* Does the des encryption from the NT or LM MD4 hash. */
227 SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8,
228 unsigned char p24[24])
230 unsigned char p21[21];
232 memset(p21, '\0', 21);
234 memcpy(p21, passwd, 16);
238 /* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */
240 NTLMSSPOWFencrypt(unsigned char passwd[8],
241 unsigned char *ntlmchalresp, unsigned char p24[24])
243 unsigned char p21[21];
245 memset(p21, '\0', 21);
246 memcpy(p21, passwd, 8);
247 memset(p21 + 8, 0xbd, 8);
249 E_P24(p21, ntlmchalresp, p24);
252 /* Does the NT MD4 hash then des encryption. */
255 SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24)
257 unsigned char p21[21];
259 memset(p21, '\0', 21);
261 E_md4hash(passwd, p21);
262 SMBOWFencrypt(p21, c8, p24);
265 /* Does the md5 encryption from the NT hash for NTLMv2. */
267 SMBOWFencrypt_ntv2(const unsigned char kr[16],
268 const struct data_blob * srv_chal,
269 const struct data_blob * cli_chal, unsigned char resp_buf[16])
271 struct HMACMD5Context ctx;
273 hmac_md5_init_limK_to_64(kr, 16, &ctx);
274 hmac_md5_update(srv_chal->data, srv_chal->length, &ctx);
275 hmac_md5_update(cli_chal->data, cli_chal->length, &ctx);
276 hmac_md5_final(resp_buf, &ctx);
280 SMBsesskeygen_ntv2(const unsigned char kr[16],
281 const unsigned char *nt_resp, __u8 sess_key[16])
283 struct HMACMD5Context ctx;
285 hmac_md5_init_limK_to_64(kr, 16, &ctx);
286 hmac_md5_update(nt_resp, 16, &ctx);
287 hmac_md5_final((unsigned char *) sess_key, &ctx);
291 SMBsesskeygen_ntv1(const unsigned char kr[16],
292 const unsigned char *nt_resp, __u8 sess_key[16])
294 mdfour((unsigned char *) sess_key, (unsigned char *) kr, 16);