source3/libsmb/pwd_cache.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    Password cacheing.  obfuscation is planned
   5    Copyright (C) Luke Kenneth Casson Leighton 1996-1998
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 extern int DEBUGLEVEL;
  25
  26
  27 /****************************************************************************
  28 initialises a password structure
  29 ****************************************************************************/
  30 void pwd_init(struct pwd_info *pwd)
  31 {
  32         ZERO_STRUCT(pwd->password  );
  33         ZERO_STRUCT(pwd->smb_lm_pwd);
  34         ZERO_STRUCT(pwd->smb_nt_pwd);
  35         ZERO_STRUCT(pwd->smb_lm_owf);
  36         ZERO_STRUCT(pwd->smb_nt_owf);
  37         ZERO_STRUCT(pwd->sess_key  );
  38         pwd->nt_owf_len = 0;
  39
  40         pwd->null_pwd  = True; /* safest option... */
  41         pwd->cleartext = False;
  42         pwd->crypted   = False;
  43 }
  44
  45 /****************************************************************************
  46 returns NULL password flag
  47 ****************************************************************************/
  48 BOOL pwd_is_nullpwd(const struct pwd_info *pwd)
  49 {
  50         return pwd->null_pwd;
  51 }
  52
  53 /****************************************************************************
  54 de-obfuscates a password
  55 ****************************************************************************/
  56 static void pwd_deobfuscate(const struct pwd_info *pwd)
  57 {
  58 }
  59
  60 /****************************************************************************
  61 obfuscates a password
  62 ****************************************************************************/
  63 static void pwd_obfuscate(const struct pwd_info *pwd)
  64 {
  65 }
  66
  67 /****************************************************************************
  68 sets the obfuscation key info
  69 ****************************************************************************/
  70 void pwd_obfuscate_key(struct pwd_info *pwd, uint32 int_key, char *str_key)
  71 {
  72 }
  73
  74 /****************************************************************************
  75 compares two passwords.  hmm, not as trivial as expected.  hmm.
  76 ****************************************************************************/
  77 BOOL pwd_compare(struct pwd_info *pwd1, struct pwd_info *pwd2)
  78 {
  79         pwd_deobfuscate(pwd1);
  80         pwd_deobfuscate(pwd2);
  81         if (pwd1->cleartext && pwd2->cleartext)
  82         {
  83                 if (strequal(pwd1->password, pwd2->password))
  84                 {
  85                         pwd_obfuscate(pwd1);
  86                         pwd_obfuscate(pwd2);
  87                         return True;
  88                 }
  89         }
  90         if (pwd1->null_pwd && pwd2->null_pwd)
  91         {
  92                 pwd_obfuscate(pwd1);
  93                 pwd_obfuscate(pwd2);
  94                 return True;
  95         }
  96
  97         if (!pwd1->null_pwd  && !pwd2->null_pwd &&
  98             !pwd1->cleartext && !pwd2->cleartext)
  99         {
 100                 if (memcmp(pwd1->smb_nt_pwd, pwd2->smb_nt_pwd, 16) == 0)
 101                 {
 102                         pwd_obfuscate(pwd1);
 103                         pwd_obfuscate(pwd2);
 104                         return True;
 105                 }
 106                 if (memcmp(pwd1->smb_lm_pwd, pwd2->smb_lm_pwd, 16) == 0)
 107                 {
 108                         pwd_obfuscate(pwd1);
 109                         pwd_obfuscate(pwd2);
 110                         return True;
 111                 }
 112         }
 113         pwd_obfuscate(pwd1);
 114         pwd_obfuscate(pwd2);
 115         return False;
 116 }
 117 /****************************************************************************
 118 reads a password
 119 ****************************************************************************/
 120 void pwd_read(struct pwd_info *pwd, char *passwd_report, BOOL do_encrypt)
 121 {
 122         /* grab a password */
 123         char *user_pass;
 124
 125         pwd_init(pwd);
 126
 127         user_pass = (char*)getpass(passwd_report);
 128
 129         if (user_pass == NULL || user_pass[0] == 0)
 130         {
 131                 pwd_set_nullpwd(pwd);
 132         }
 133         else if (do_encrypt)
 134         {
 135                 pwd_make_lm_nt_16(pwd, user_pass);
 136         }
 137         else
 138         {
 139                 pwd_set_cleartext(pwd, user_pass);
 140         }
 141 }
 142
 143 /****************************************************************************
 144  stores a cleartext password
 145  ****************************************************************************/
 146 void pwd_set_nullpwd(struct pwd_info *pwd)
 147 {
 148         pwd_init(pwd);
 149
 150         pwd->cleartext = False;
 151         pwd->null_pwd  = True;
 152         pwd->crypted   = False;
 153 }
 154
 155 /****************************************************************************
 156  stores a cleartext password
 157  ****************************************************************************/
 158 void pwd_set_cleartext(struct pwd_info *pwd, char *clr)
 159 {
 160         pwd_init(pwd);
 161         fstrcpy(pwd->password, clr);
 162         pwd->cleartext = True;
 163         pwd->null_pwd  = False;
 164         pwd->crypted   = False;
 165
 166         pwd_obfuscate(pwd);
 167 }
 168
 169 /****************************************************************************
 170  gets a cleartext password
 171  ****************************************************************************/
 172 void pwd_get_cleartext(struct pwd_info *pwd, char *clr)
 173 {
 174         pwd_deobfuscate(pwd);
 175         if (pwd->cleartext)
 176         {
 177                 fstrcpy(clr, pwd->password);
 178         }
 179         else
 180         {
 181                 clr[0] = 0;
 182         }
 183         pwd_obfuscate(pwd);
 184 }
 185
 186 /****************************************************************************
 187  stores lm and nt hashed passwords
 188  ****************************************************************************/
 189 void pwd_set_lm_nt_16(struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
 190 {
 191         pwd_init(pwd);
 192
 193         if (lm_pwd)
 194         {
 195                 memcpy(pwd->smb_lm_pwd, lm_pwd, 16);
 196         }
 197         else
 198         {
 199                 bzero(pwd->smb_lm_pwd, 16);
 200         }
 201
 202         if (nt_pwd)
 203         {
 204                 memcpy(pwd->smb_nt_pwd, nt_pwd, 16);
 205         }
 206         else
 207         {
 208                 bzero(pwd->smb_nt_pwd, 16);
 209         }
 210
 211         pwd->null_pwd  = False;
 212         pwd->cleartext = False;
 213         pwd->crypted   = False;
 214
 215         pwd_obfuscate(pwd);
 216 }
 217
 218 /****************************************************************************
 219  gets lm and nt hashed passwords
 220  ****************************************************************************/
 221 void pwd_get_lm_nt_16(const struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
 222 {
 223         pwd_deobfuscate(pwd);
 224         if (lm_pwd != NULL)
 225         {
 226                 memcpy(lm_pwd, pwd->smb_lm_pwd, 16);
 227         }
 228         if (nt_pwd != NULL)
 229         {
 230                 memcpy(nt_pwd, pwd->smb_nt_pwd, 16);
 231         }
 232         pwd_obfuscate(pwd);
 233 }
 234
 235 /****************************************************************************
 236  makes lm and nt hashed passwords
 237  ****************************************************************************/
 238 void pwd_make_lm_nt_16(struct pwd_info *pwd, char *clr)
 239 {
 240         pwd_init(pwd);
 241
 242         nt_lm_owf_gen(clr, pwd->smb_nt_pwd, pwd->smb_lm_pwd);
 243         pwd->null_pwd  = False;
 244         pwd->cleartext = False;
 245         pwd->crypted = False;
 246
 247         pwd_obfuscate(pwd);
 248 }
 249
 250 /****************************************************************************
 251  makes lm and nt OWF crypts
 252  ****************************************************************************/
 253 void pwd_make_lm_nt_owf2(struct pwd_info *pwd, const uchar srv_key[8],
 254                 const char *user, const char *server, const char *domain)
 255 {
 256         uchar kr[16];
 257
 258         DEBUG(10,("pwd_make_lm_nt_owf2: user %s, srv %s, dom %s\n",
 259                 user, server, domain));
 260
 261         pwd_deobfuscate(pwd);
 262
 263         SMBgenclientchals(pwd->lm_cli_chal,
 264                           pwd->nt_cli_chal,
 265                           &pwd->nt_cli_chal_len,
 266                           server, domain);
 267
 268         ntv2_owf_gen(pwd->smb_nt_pwd, user, domain, kr);
 269
 270         /* lm # */
 271         SMBOWFencrypt_ntv2(kr,
 272                            srv_key, 8,
 273                            pwd->lm_cli_chal, 8,
 274                            pwd->smb_lm_owf);
 275         memcpy(&pwd->smb_lm_owf[16], pwd->lm_cli_chal, 8);
 276
 277         /* nt # */
 278         SMBOWFencrypt_ntv2(kr,
 279                        srv_key, 8,
 280                        pwd->nt_cli_chal, pwd->nt_cli_chal_len,
 281                        pwd->smb_nt_owf);
 282         memcpy(&pwd->smb_nt_owf[16], pwd->nt_cli_chal, pwd->nt_cli_chal_len);
 283         pwd->nt_owf_len = pwd->nt_cli_chal_len + 16;
 284
 285         SMBsesskeygen_ntv2(kr, pwd->smb_nt_owf, pwd->sess_key);
 286
 287 #if DEBUG_PASSWORD
 288 #endif
 289
 290 #ifdef DEBUG_PASSWORD
 291         DEBUG(100,("server cryptkey: "));
 292         dump_data(100, srv_key, 8);
 293
 294         DEBUG(100,("client lmv2 cryptkey: "));
 295         dump_data(100, pwd->lm_cli_chal, 8);
 296
 297         DEBUG(100,("client ntv2 cryptkey: "));
 298         dump_data(100, pwd->nt_cli_chal, pwd->nt_cli_chal_len);
 299
 300         DEBUG(100,("ntv2_owf_passwd: "));
 301         dump_data(100, pwd->smb_nt_owf, pwd->nt_owf_len);
 302         DEBUG(100,("nt_sess_pwd: "));
 303         dump_data(100, pwd->smb_nt_pwd, sizeof(pwd->smb_nt_pwd));
 304
 305         DEBUG(100,("lmv2_owf_passwd: "));
 306         dump_data(100, pwd->smb_lm_owf, sizeof(pwd->smb_lm_owf));
 307         DEBUG(100,("lm_sess_pwd: "));
 308         dump_data(100, pwd->smb_lm_pwd, sizeof(pwd->smb_lm_pwd));
 309
 310         DEBUG(100,("session key:\n"));
 311         dump_data(100, pwd->sess_key, sizeof(pwd->sess_key));
 312 #endif
 313         pwd->crypted = True;
 314
 315         pwd_obfuscate(pwd);
 316 }
 317
 318 /****************************************************************************
 319  makes lm and nt OWF crypts
 320  ****************************************************************************/
 321 void pwd_make_lm_nt_owf(struct pwd_info *pwd, uchar cryptkey[8])
 322 {
 323         if (pwd->null_pwd)
 324         {
 325 #ifdef DEBUG_PASSWORD
 326                 DEBUG(100,("pwd_make_lm_nt_owf: NULL password\n"));
 327 #endif
 328                 pwd->nt_owf_len = 0;
 329                 return;
 330         }
 331         pwd_deobfuscate(pwd);
 332
 333         /* generate 24-byte hashes */
 334         SMBOWFencrypt(pwd->smb_lm_pwd, cryptkey, pwd->smb_lm_owf);
 335         SMBOWFencrypt(pwd->smb_nt_pwd, cryptkey, pwd->smb_nt_owf);
 336         pwd->nt_owf_len = 24;
 337
 338         SMBsesskeygen_ntv1(pwd->smb_nt_pwd, pwd->smb_nt_owf, pwd->sess_key);
 339
 340 #ifdef DEBUG_PASSWORD
 341         DEBUG(100,("client cryptkey: "));
 342         dump_data(100, cryptkey, 8);
 343
 344         DEBUG(100,("nt_owf_passwd: "));
 345         dump_data(100, pwd->smb_nt_owf, pwd->nt_owf_len);
 346         DEBUG(100,("nt_sess_pwd: "));
 347         dump_data(100, pwd->smb_nt_pwd, sizeof(pwd->smb_nt_pwd));
 348
 349         DEBUG(100,("lm_owf_passwd: "));
 350         dump_data(100, pwd->smb_lm_owf, sizeof(pwd->smb_lm_owf));
 351         DEBUG(100,("lm_sess_pwd: "));
 352         dump_data(100, pwd->smb_lm_pwd, sizeof(pwd->smb_lm_pwd));
 353
 354         DEBUG(100,("session key:\n"));
 355         dump_data(100, pwd->sess_key, sizeof(pwd->sess_key));
 356 #endif
 357
 358         pwd->crypted = True;
 359
 360         pwd_obfuscate(pwd);
 361 }
 362
 363 /****************************************************************************
 364  gets lm and nt crypts
 365  ****************************************************************************/
 366 void pwd_get_lm_nt_owf(struct pwd_info *pwd, uchar lm_owf[24],
 367                                 uchar *nt_owf, size_t *nt_owf_len,
 368                                 uchar *sess_key)
 369 {
 370         if (pwd->null_pwd)
 371         {
 372 #ifdef DEBUG_PASSWORD
 373                 DEBUG(100,("pwd_get_lm_nt_owf: NULL password\n"));
 374 #endif
 375                 if (nt_owf_len != NULL)
 376                 {
 377                         *nt_owf_len = 0;
 378                 }
 379                 return;
 380         }
 381
 382         pwd_deobfuscate(pwd);
 383         if (lm_owf != NULL)
 384         {
 385                 memcpy(lm_owf, pwd->smb_lm_owf, 24);
 386         }
 387         if (nt_owf != NULL)
 388         {
 389                 memcpy(nt_owf, pwd->smb_nt_owf, pwd->nt_owf_len);
 390         }
 391         if (sess_key != NULL)
 392         {
 393                 memcpy(sess_key, pwd->sess_key, 16);
 394         }
 395         if (nt_owf_len != NULL)
 396         {
 397                 *nt_owf_len = pwd->nt_owf_len;
 398         }
 399         pwd_obfuscate(pwd);
 400 }
 401