Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 French | 3979877 | 2006-05-31 22:40:51 +0000 | [diff] [blame] | 33 | #include "cifsglob.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #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 | |
| 52 | void SMBencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24); |
| 53 | void E_md4hash(const unsigned char *passwd, unsigned char *p16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | static void SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8, |
| 55 | unsigned char p24[24]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | void 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 */ |
| 63 | void |
| 64 | SMBencrypt(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. */ |
| 82 | static 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 | |
| 98 | static 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 | |
| 119 | void |
| 120 | E_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 | |
| 144 | /* Does both the NT and LM owfs of a user's password */ |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 145 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | nt_lm_owf_gen(char *pwd, unsigned char nt_p16[16], unsigned char p16[16]) |
| 147 | { |
| 148 | char passwd[514]; |
| 149 | |
| 150 | memset(passwd, '\0', 514); |
| 151 | if (strlen(pwd) < 513) |
| 152 | strcpy(passwd, pwd); |
| 153 | else |
| 154 | memcpy(passwd, pwd, 512); |
| 155 | /* Calculate the MD4 hash (NT compatible) of the password */ |
| 156 | memset(nt_p16, '\0', 16); |
| 157 | E_md4hash(passwd, nt_p16); |
| 158 | |
| 159 | /* Mangle the passwords into Lanman format */ |
| 160 | passwd[14] = '\0'; |
| 161 | /* strupper(passwd); */ |
| 162 | |
| 163 | /* Calculate the SMB (lanman) hash functions of the password */ |
| 164 | |
| 165 | memset(p16, '\0', 16); |
| 166 | E_P16((unsigned char *) passwd, (unsigned char *) p16); |
| 167 | |
| 168 | /* clear out local copy of user's password (just being paranoid). */ |
| 169 | memset(passwd, '\0', sizeof (passwd)); |
| 170 | } |
| 171 | |
| 172 | /* Does the NTLMv2 owfs of a user's password */ |
| 173 | #if 0 /* function not needed yet - but will be soon */ |
| 174 | static void |
| 175 | ntv2_owf_gen(const unsigned char owf[16], const char *user_n, |
| 176 | const char *domain_n, unsigned char kr_buf[16], |
| 177 | const struct nls_table *nls_codepage) |
| 178 | { |
| 179 | wchar_t * user_u; |
| 180 | wchar_t * dom_u; |
| 181 | int user_l, domain_l; |
| 182 | struct HMACMD5Context ctx; |
| 183 | |
| 184 | /* might as well do one alloc to hold both (user_u and dom_u) */ |
| 185 | user_u = kmalloc(2048 * sizeof(wchar_t),GFP_KERNEL); |
| 186 | if(user_u == NULL) |
| 187 | return; |
| 188 | dom_u = user_u + 1024; |
| 189 | |
| 190 | /* push_ucs2(NULL, user_u, user_n, (user_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); |
| 191 | push_ucs2(NULL, dom_u, domain_n, (domain_l+1)*2, STR_UNICODE|STR_NOALIGN|STR_TERMINATE|STR_UPPER); */ |
| 192 | |
| 193 | /* BB user and domain may need to be uppercased */ |
| 194 | user_l = cifs_strtoUCS(user_u, user_n, 511, nls_codepage); |
| 195 | domain_l = cifs_strtoUCS(dom_u, domain_n, 511, nls_codepage); |
| 196 | |
| 197 | user_l++; /* trailing null */ |
| 198 | domain_l++; |
| 199 | |
| 200 | hmac_md5_init_limK_to_64(owf, 16, &ctx); |
| 201 | hmac_md5_update((const unsigned char *) user_u, user_l * 2, &ctx); |
| 202 | hmac_md5_update((const unsigned char *) dom_u, domain_l * 2, &ctx); |
| 203 | hmac_md5_final(kr_buf, &ctx); |
| 204 | |
| 205 | kfree(user_u); |
| 206 | } |
| 207 | #endif |
| 208 | |
| 209 | /* Does the des encryption from the NT or LM MD4 hash. */ |
| 210 | static void |
| 211 | SMBOWFencrypt(unsigned char passwd[16], unsigned char *c8, |
| 212 | unsigned char p24[24]) |
| 213 | { |
| 214 | unsigned char p21[21]; |
| 215 | |
| 216 | memset(p21, '\0', 21); |
| 217 | |
| 218 | memcpy(p21, passwd, 16); |
| 219 | E_P24(p21, c8, p24); |
| 220 | } |
| 221 | |
| 222 | /* Does the des encryption from the FIRST 8 BYTES of the NT or LM MD4 hash. */ |
Steve French | 2cd646a | 2006-09-28 19:43:08 +0000 | [diff] [blame] | 223 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | NTLMSSPOWFencrypt(unsigned char passwd[8], |
| 225 | unsigned char *ntlmchalresp, unsigned char p24[24]) |
| 226 | { |
| 227 | unsigned char p21[21]; |
| 228 | |
| 229 | memset(p21, '\0', 21); |
| 230 | memcpy(p21, passwd, 8); |
| 231 | memset(p21 + 8, 0xbd, 8); |
| 232 | |
| 233 | E_P24(p21, ntlmchalresp, p24); |
| 234 | } |
| 235 | |
| 236 | /* Does the NT MD4 hash then des encryption. */ |
| 237 | |
| 238 | void |
| 239 | SMBNTencrypt(unsigned char *passwd, unsigned char *c8, unsigned char *p24) |
| 240 | { |
| 241 | unsigned char p21[21]; |
| 242 | |
| 243 | memset(p21, '\0', 21); |
| 244 | |
| 245 | E_md4hash(passwd, p21); |
| 246 | SMBOWFencrypt(p21, c8, p24); |
| 247 | } |
| 248 | |
| 249 | |
| 250 | /* Does the md5 encryption from the NT hash for NTLMv2. */ |
| 251 | /* These routines will be needed later */ |
| 252 | #if 0 |
| 253 | static void |
| 254 | SMBOWFencrypt_ntv2(const unsigned char kr[16], |
| 255 | const struct data_blob * srv_chal, |
| 256 | const struct data_blob * cli_chal, unsigned char resp_buf[16]) |
| 257 | { |
| 258 | struct HMACMD5Context ctx; |
| 259 | |
| 260 | hmac_md5_init_limK_to_64(kr, 16, &ctx); |
| 261 | hmac_md5_update(srv_chal->data, srv_chal->length, &ctx); |
| 262 | hmac_md5_update(cli_chal->data, cli_chal->length, &ctx); |
| 263 | hmac_md5_final(resp_buf, &ctx); |
| 264 | } |
| 265 | |
| 266 | static void |
| 267 | SMBsesskeygen_ntv2(const unsigned char kr[16], |
| 268 | const unsigned char *nt_resp, __u8 sess_key[16]) |
| 269 | { |
| 270 | struct HMACMD5Context ctx; |
| 271 | |
| 272 | hmac_md5_init_limK_to_64(kr, 16, &ctx); |
| 273 | hmac_md5_update(nt_resp, 16, &ctx); |
| 274 | hmac_md5_final((unsigned char *) sess_key, &ctx); |
| 275 | } |
| 276 | |
| 277 | static void |
| 278 | SMBsesskeygen_ntv1(const unsigned char kr[16], |
| 279 | const unsigned char *nt_resp, __u8 sess_key[16]) |
| 280 | { |
| 281 | mdfour((unsigned char *) sess_key, (unsigned char *) kr, 16); |
| 282 | } |
| 283 | #endif |