source/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         memset((char *)pwd->password  , '\0', sizeof(pwd->password  ));
  33         memset((char *)pwd->smb_lm_pwd, '\0', sizeof(pwd->smb_lm_pwd));
  34         memset((char *)pwd->smb_nt_pwd, '\0', sizeof(pwd->smb_nt_pwd));
  35         memset((char *)pwd->smb_lm_owf, '\0', sizeof(pwd->smb_lm_owf));
  36         memset((char *)pwd->smb_nt_owf, '\0', sizeof(pwd->smb_nt_owf));
  37
  38         pwd->null_pwd  = True; /* safest option... */
  39         pwd->cleartext = False;
  40         pwd->crypted   = False;
  41 }
  42
  43 /****************************************************************************
  44 returns NULL password flag
  45 ****************************************************************************/
  46 BOOL pwd_is_nullpwd(const struct pwd_info *pwd)
  47 {
  48         return pwd->null_pwd;
  49 }
  50
  51
  52 /****************************************************************************
  53 compares two passwords.  hmm, not as trivial as expected.  hmm.
  54 ****************************************************************************/
  55 BOOL pwd_compare(struct pwd_info *pwd1, struct pwd_info *pwd2)
  56 {
  57         if (pwd1->cleartext && pwd2->cleartext)
  58         {
  59                 if (strequal(pwd1->password, pwd2->password))
  60                 {
  61                         return True;
  62                 }
  63         }
  64         if (pwd1->null_pwd && pwd2->null_pwd)
  65         {
  66                 return True;
  67         }
  68
  69         if (!pwd1->null_pwd  && !pwd2->null_pwd &&
  70             !pwd1->cleartext && !pwd2->cleartext)
  71         {
  72 #ifdef DEBUG_PASSWORD
  73                 DEBUG(100,("pwd compare: nt#\n"));
  74                 dump_data(100, pwd1->smb_nt_pwd, 16);
  75                 dump_data(100, pwd2->smb_nt_pwd, 16);
  76 #endif
  77                 if (memcmp(pwd1->smb_nt_pwd, pwd2->smb_nt_pwd, 16) == 0)
  78                 {
  79                         return True;
  80                 }
  81 #ifdef DEBUG_PASSWORD
  82                 DEBUG(100,("pwd compare: lm#\n"));
  83                 dump_data(100, pwd1->smb_lm_pwd, 16);
  84                 dump_data(100, pwd2->smb_lm_pwd, 16);
  85 #endif
  86                 if (memcmp(pwd1->smb_lm_pwd, pwd2->smb_lm_pwd, 16) == 0)
  87                 {
  88                         return True;
  89                 }
  90         }
  91         return False;
  92 }
  93
  94 /****************************************************************************
  95 reads a password
  96 ****************************************************************************/
  97 void pwd_read(struct pwd_info *pwd, char *passwd_report, BOOL do_encrypt)
  98 {
  99         /* grab a password */
 100         char *user_pass;
 101
 102         pwd_init(pwd);
 103
 104         user_pass = (char*)getpass(passwd_report);
 105
 106         /*
 107          * Do not assume that an empty string is a NULL password.
 108          * If you do this will break the session key generation for
 109          * and account with an emtpy password.  If you wish to use
 110          * a NULL password, use the -N option to smbclient and rpcclient
 111          * --jerry
 112          */
 113 #if 0
 114         if (user_pass == NULL || user_pass[0] == 0)
 115         {
 116                 pwd_set_nullpwd(pwd);
 117         }
 118         else if (do_encrypt)
 119 #endif
 120         if (do_encrypt)
 121         {
 122                 pwd_make_lm_nt_16(pwd, user_pass);
 123         }
 124         else
 125         {
 126                 pwd_set_cleartext(pwd, user_pass);
 127         }
 128 }
 129
 130 /****************************************************************************
 131  stores a cleartext password
 132  ****************************************************************************/
 133 void pwd_set_nullpwd(struct pwd_info *pwd)
 134 {
 135         pwd_init(pwd);
 136
 137         pwd->cleartext = False;
 138         pwd->null_pwd  = True;
 139         pwd->crypted   = False;
 140 }
 141
 142 /****************************************************************************
 143  stores a cleartext password
 144  ****************************************************************************/
 145 void pwd_set_cleartext(struct pwd_info *pwd, char *clr)
 146 {
 147         pwd_init(pwd);
 148         fstrcpy(pwd->password, clr);
 149         unix_to_dos(pwd->password,True);
 150         pwd->cleartext = True;
 151         pwd->null_pwd  = False;
 152         pwd->crypted   = False;
 153 }
 154
 155 /****************************************************************************
 156  gets a cleartext password
 157  ****************************************************************************/
 158 void pwd_get_cleartext(struct pwd_info *pwd, char *clr)
 159 {
 160         if (pwd->cleartext)
 161         {
 162                 fstrcpy(clr, pwd->password);
 163                 dos_to_unix(clr, True);
 164         }
 165         else
 166         {
 167                 clr[0] = 0;
 168         }
 169 }
 170
 171 /****************************************************************************
 172  stores lm and nt hashed passwords
 173  ****************************************************************************/
 174 void pwd_set_lm_nt_16(struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
 175 {
 176         pwd_init(pwd);
 177
 178         if (lm_pwd)
 179         {
 180                 memcpy(pwd->smb_lm_pwd, lm_pwd, 16);
 181         }
 182         else
 183         {
 184                 memset((char *)pwd->smb_lm_pwd, '\0', 16);
 185         }
 186
 187         if (nt_pwd)
 188         {
 189                 memcpy(pwd->smb_nt_pwd, nt_pwd, 16);
 190         }
 191         else
 192         {
 193                 memset((char *)pwd->smb_nt_pwd, '\0', 16);
 194         }
 195
 196         pwd->null_pwd  = False;
 197         pwd->cleartext = False;
 198         pwd->crypted   = False;
 199 }
 200
 201 /****************************************************************************
 202  gets lm and nt hashed passwords
 203  ****************************************************************************/
 204 void pwd_get_lm_nt_16(struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
 205 {
 206         if (lm_pwd != NULL)
 207         {
 208                 memcpy(lm_pwd, pwd->smb_lm_pwd, 16);
 209         }
 210         if (nt_pwd != NULL)
 211         {
 212                 memcpy(nt_pwd, pwd->smb_nt_pwd, 16);
 213         }
 214 }
 215
 216 /****************************************************************************
 217  makes lm and nt hashed passwords
 218  ****************************************************************************/
 219 void pwd_make_lm_nt_16(struct pwd_info *pwd, char *clr)
 220 {
 221         pstring dos_passwd;
 222
 223         pwd_init(pwd);
 224
 225         pstrcpy(dos_passwd, clr);
 226         unix_to_dos(dos_passwd, True);
 227
 228         nt_lm_owf_gen(dos_passwd, pwd->smb_nt_pwd, pwd->smb_lm_pwd);
 229         pwd->null_pwd  = False;
 230         pwd->cleartext = False;
 231         pwd->crypted = False;
 232 }
 233
 234 /****************************************************************************
 235  makes lm and nt OWF crypts
 236  ****************************************************************************/
 237 void pwd_make_lm_nt_owf(struct pwd_info *pwd, uchar cryptkey[8])
 238 {
 239
 240 #ifdef DEBUG_PASSWORD
 241         DEBUG(100,("client cryptkey: "));
 242         dump_data(100, (char *)cryptkey, 8);
 243 #endif
 244
 245         SMBOWFencrypt(pwd->smb_nt_pwd, cryptkey, pwd->smb_nt_owf);
 246
 247 #ifdef DEBUG_PASSWORD
 248         DEBUG(100,("nt_owf_passwd: "));
 249         dump_data(100, (char *)pwd->smb_nt_owf, sizeof(pwd->smb_nt_owf));
 250         DEBUG(100,("nt_sess_pwd: "));
 251         dump_data(100, (char *)pwd->smb_nt_pwd, sizeof(pwd->smb_nt_pwd));
 252 #endif
 253
 254         SMBOWFencrypt(pwd->smb_lm_pwd, cryptkey, pwd->smb_lm_owf);
 255
 256 #ifdef DEBUG_PASSWORD
 257         DEBUG(100,("lm_owf_passwd: "));
 258         dump_data(100, (char *)pwd->smb_lm_owf, sizeof(pwd->smb_lm_owf));
 259         DEBUG(100,("lm_sess_pwd: "));
 260         dump_data(100, (char *)pwd->smb_lm_pwd, sizeof(pwd->smb_lm_pwd));
 261 #endif
 262
 263         pwd->crypted = True;
 264 }
 265
 266 /****************************************************************************
 267  gets lm and nt crypts
 268  ****************************************************************************/
 269 void pwd_get_lm_nt_owf(struct pwd_info *pwd, uchar lm_owf[24], uchar nt_owf[24])
 270 {
 271         if (lm_owf != NULL)
 272         {
 273                 memcpy(lm_owf, pwd->smb_lm_owf, 24);
 274         }
 275         if (nt_owf != NULL)
 276         {
 277                 memcpy(nt_owf, pwd->smb_nt_owf, 24);
 278         }
 279 }