Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 10 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 20 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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" |
Steve French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 34 | #include "cifsglob.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "cifs_debug.h" |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 36 | #include "cifsproto.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 38 | #ifndef false |
| 39 | #define false 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #endif |
Steve French | 4b18f2a | 2008-04-29 00:06:05 +0000 | [diff] [blame] | 41 | #ifndef true |
| 42 | #define true 1 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 59 | md4 = crypto_alloc_shash("md4", 0, 0); |
| 60 | if (IS_ERR(md4)) { |
Jeff Layton | ffeb414 | 2011-01-29 07:03:02 -0500 | [diff] [blame] | 61 | rc = PTR_ERR(md4); |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 62 | cERROR(1, "%s: Crypto md4 allocation error %d\n", __func__, rc); |
Jeff Layton | ffeb414 | 2011-01-29 07:03:02 -0500 | [diff] [blame] | 63 | return rc; |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 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); |
| 82 | |
| 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
| 103 | /* |
| 104 | This implements the X/Open SMB password encryption |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 105 | It takes a password, a 8 byte "crypt key" and puts 24 bytes of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | encrypted password into p24 */ |
| 107 | /* Note that password must be uppercased and null terminated */ |
| 108 | void |
Jeff Layton | 4e53a3f | 2008-12-05 20:41:21 -0500 | [diff] [blame] | 109 | SMBencrypt(unsigned char *passwd, const unsigned char *c8, unsigned char *p24) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 121 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 122 | memset(p14, 0, 15); |
| 123 | memset(p21, 0, 21); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /* Routines for Windows NT MD4 Hash functions. */ |
| 127 | static int |
Steve French | 63d2583 | 2007-11-05 21:46:10 +0000 | [diff] [blame] | 128 | _my_wcslen(__u16 *str) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 138 | * Note that regardless of processor type |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | * this must be in intel (little-endian) |
| 140 | * format. |
| 141 | */ |
| 142 | |
| 143 | static int |
Steve French | 63d2583 | 2007-11-05 21:46:10 +0000 | [diff] [blame] | 144 | _my_mbstowcs(__u16 *dst, const unsigned char *src, int len) |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 145 | { /* BB not a very good conversion routine - change/fix */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 160 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | * Creates the MD4 Hash of the users password in NT UNICODE. |
| 162 | */ |
| 163 | |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 164 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | E_md4hash(const unsigned char *passwd, unsigned char *p16) |
| 166 | { |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 167 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | int len; |
| 169 | __u16 wpwd[129]; |
| 170 | |
| 171 | /* Password cannot be longer than 128 characters */ |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 172 | if (passwd) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | len = strlen((char *) passwd); |
Steve French | 63d2583 | 2007-11-05 21:46:10 +0000 | [diff] [blame] | 174 | if (len > 128) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | len = 128; |
Steve French | 63d2583 | 2007-11-05 21:46:10 +0000 | [diff] [blame] | 176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |
Steve French | 630f3f0 | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 184 | len = _my_wcslen(wpwd) * sizeof(__u16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 186 | rc = mdfour(p16, (unsigned char *) wpwd, len); |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 187 | memset(wpwd, 0, 129 * 2); |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 188 | |
| 189 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
Steve French | e10847e | 2006-09-28 20:49:01 +0000 | [diff] [blame] | 192 | #if 0 /* currently unused */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | /* Does both the NT and LM owfs of a user's password */ |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 194 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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). */ |
Steve French | 630f3f0 | 2007-10-25 21:17:17 +0000 | [diff] [blame] | 218 | memset(passwd, '\0', sizeof(passwd)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
Steve French | e10847e | 2006-09-28 20:49:01 +0000 | [diff] [blame] | 220 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | { |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 229 | wchar_t *user_u; |
| 230 | wchar_t *dom_u; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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) */ |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 235 | user_u = kmalloc(2048 * sizeof(wchar_t), GFP_KERNEL); |
| 236 | if (user_u == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | return; |
| 238 | dom_u = user_u + 1024; |
Steve French | 50c2f75 | 2007-07-13 00:33:32 +0000 | [diff] [blame] | 239 | |
Steve French | 63d2583 | 2007-11-05 21:46:10 +0000 | [diff] [blame] | 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); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 259 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | /* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */ |
Steve French | e10847e | 2006-09-28 20:49:01 +0000 | [diff] [blame] | 262 | #if 0 /* currently unused */ |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 263 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | } |
Steve French | e10847e | 2006-09-28 20:49:01 +0000 | [diff] [blame] | 275 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | |
| 277 | /* Does the NT MD4 hash then des encryption. */ |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 278 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24) |
| 280 | { |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 281 | int rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | unsigned char p21[21]; |
| 283 | |
| 284 | memset(p21, '\0', 21); |
| 285 | |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | SMBOWFencrypt(p21, c8, p24); |
Shirish Pargaonkar | ee2c925 | 2011-01-27 09:58:04 -0600 | [diff] [blame] | 292 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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], |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 301 | const struct data_blob *srv_chal, |
| 302 | const struct data_blob *cli_chal, unsigned char resp_buf[16]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | { |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 304 | struct HMACMD5Context ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
Steve French | 790fe57 | 2007-07-07 19:25:05 +0000 | [diff] [blame] | 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); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |