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 /****************************************************************************
  25  Initialises a password structure.
  26 ****************************************************************************/
  27
  28 void pwd_init(struct pwd_info *pwd)
  29 {
  30         memset((char *)pwd->password  , '\0', sizeof(pwd->password  ));
  31         memset((char *)pwd->smb_lm_pwd, '\0', sizeof(pwd->smb_lm_pwd));
  32         memset((char *)pwd->smb_nt_pwd, '\0', sizeof(pwd->smb_nt_pwd));
  33         memset((char *)pwd->smb_lm_owf, '\0', sizeof(pwd->smb_lm_owf));
  34         memset((char *)pwd->smb_nt_owf, '\0', sizeof(pwd->smb_nt_owf));
  35
  36         pwd->null_pwd  = True; /* safest option... */
  37         pwd->cleartext = False;
  38         pwd->crypted   = False;
  39 }
  40
  41 /****************************************************************************
  42  Returns NULL password flag.
  43 ****************************************************************************/
  44
  45 BOOL pwd_is_nullpwd(const struct pwd_info *pwd)
  46 {
  47         return pwd->null_pwd;
  48 }
  49
  50 /****************************************************************************
  51  Compares two passwords.  hmm, not as trivial as expected.  hmm.
  52 ****************************************************************************/
  53
  54 BOOL pwd_compare(struct pwd_info *pwd1, struct pwd_info *pwd2)
  55 {
  56         if (pwd1->cleartext && pwd2->cleartext) {
  57                 if (strequal(pwd1->password, pwd2->password))
  58                         return True;
  59         }
  60         if (pwd1->null_pwd && pwd2->null_pwd)
  61                 return True;
  62
  63         if (!pwd1->null_pwd  && !pwd2->null_pwd &&
  64             !pwd1->cleartext && !pwd2->cleartext) {
  65 #ifdef DEBUG_PASSWORD
  66                 DEBUG(100,("pwd compare: nt#\n"));
  67                 dump_data(100, pwd1->smb_nt_pwd, 16);
  68                 dump_data(100, pwd2->smb_nt_pwd, 16);
  69 #endif
  70                 if (memcmp(pwd1->smb_nt_pwd, pwd2->smb_nt_pwd, 16) == 0)
  71                         return True;
  72 #ifdef DEBUG_PASSWORD
  73                 DEBUG(100,("pwd compare: lm#\n"));
  74                 dump_data(100, pwd1->smb_lm_pwd, 16);
  75                 dump_data(100, pwd2->smb_lm_pwd, 16);
  76 #endif
  77                 if (memcmp(pwd1->smb_lm_pwd, pwd2->smb_lm_pwd, 16) == 0)
  78                         return True;
  79         }
  80         return False;
  81 }
  82
  83 /****************************************************************************
  84  Reads a password.
  85 ****************************************************************************/
  86
  87 void pwd_read(struct pwd_info *pwd, char *passwd_report, BOOL do_encrypt)
  88 {
  89         /* grab a password */
  90         char *user_pass;
  91
  92         pwd_init(pwd);
  93
  94         user_pass = (char*)getpass(passwd_report);
  95
  96         /*
  97          * Do not assume that an empty string is a NULL password.
  98          * If you do this will break the session key generation for
  99          * and account with an emtpy password.  If you wish to use
 100          * a NULL password, use the -N option to smbclient and rpcclient
 101          * --jerry
 102          */
 103 #if 0
 104         if (user_pass == NULL || user_pass[0] == 0)
 105                 pwd_set_nullpwd(pwd);
 106         else if (do_encrypt)
 107 #endif
 108         if (do_encrypt)
 109                 pwd_make_lm_nt_16(pwd, user_pass);
 110         else
 111                 pwd_set_cleartext(pwd, user_pass);
 112 }
 113
 114 /****************************************************************************
 115  Stores a cleartext password.
 116 ****************************************************************************/
 117
 118 void pwd_set_nullpwd(struct pwd_info *pwd)
 119 {
 120         pwd_init(pwd);
 121
 122         pwd->cleartext = False;
 123         pwd->null_pwd  = True;
 124         pwd->crypted   = False;
 125 }
 126
 127 /****************************************************************************
 128  Stores a cleartext password.
 129  ****************************************************************************/
 130
 131 void pwd_set_cleartext(struct pwd_info *pwd, char *clr)
 132 {
 133         pwd_init(pwd);
 134         fstrcpy(pwd->password, clr);
 135         unix_to_dos(pwd->password);
 136         pwd->cleartext = True;
 137         pwd->null_pwd  = False;
 138         pwd->crypted   = False;
 139 }
 140
 141 /****************************************************************************
 142  Gets a cleartext password.
 143 ****************************************************************************/
 144
 145 void pwd_get_cleartext(struct pwd_info *pwd, char *clr)
 146 {
 147         if (pwd->cleartext) {
 148                 fstrcpy(clr, pwd->password);
 149                 dos_to_unix(clr);
 150         } else {
 151                 clr[0] = 0;
 152         }
 153 }
 154
 155 /****************************************************************************
 156  Stores lm and nt hashed passwords.
 157 ****************************************************************************/
 158
 159 void pwd_set_lm_nt_16(struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
 160 {
 161         pwd_init(pwd);
 162
 163         if (lm_pwd)
 164                 memcpy(pwd->smb_lm_pwd, lm_pwd, 16);
 165         else
 166                 memset((char *)pwd->smb_lm_pwd, '\0', 16);
 167
 168         if (nt_pwd)
 169                 memcpy(pwd->smb_nt_pwd, nt_pwd, 16);
 170         else
 171                 memset((char *)pwd->smb_nt_pwd, '\0', 16);
 172
 173         pwd->null_pwd  = False;
 174         pwd->cleartext = False;
 175         pwd->crypted   = False;
 176 }
 177
 178 /****************************************************************************
 179  Gets lm and nt hashed passwords.
 180 ****************************************************************************/
 181
 182 void pwd_get_lm_nt_16(struct pwd_info *pwd, uchar lm_pwd[16], uchar nt_pwd[16])
 183 {
 184         if (lm_pwd != NULL)
 185                 memcpy(lm_pwd, pwd->smb_lm_pwd, 16);
 186         if (nt_pwd != NULL)
 187                 memcpy(nt_pwd, pwd->smb_nt_pwd, 16);
 188 }
 189
 190 /****************************************************************************
 191  Makes lm and nt hashed passwords.
 192 ****************************************************************************/
 193
 194 void pwd_make_lm_nt_16(struct pwd_info *pwd, char *clr)
 195 {
 196         pstring dos_passwd;
 197
 198         pwd_init(pwd);
 199
 200         pstrcpy(dos_passwd, clr);
 201         unix_to_dos(dos_passwd);
 202
 203         nt_lm_owf_gen(dos_passwd, pwd->smb_nt_pwd, pwd->smb_lm_pwd);
 204         pwd->null_pwd  = False;
 205         pwd->cleartext = False;
 206         pwd->crypted = False;
 207 }
 208
 209 /****************************************************************************
 210  Makes lm and nt OWF crypts.
 211 ****************************************************************************/
 212
 213 void pwd_make_lm_nt_owf(struct pwd_info *pwd, uchar cryptkey[8])
 214 {
 215
 216 #ifdef DEBUG_PASSWORD
 217         DEBUG(100,("client cryptkey: "));
 218         dump_data(100, (char *)cryptkey, 8);
 219 #endif
 220
 221         SMBOWFencrypt(pwd->smb_nt_pwd, cryptkey, pwd->smb_nt_owf);
 222
 223 #ifdef DEBUG_PASSWORD
 224         DEBUG(100,("nt_owf_passwd: "));
 225         dump_data(100, (char *)pwd->smb_nt_owf, sizeof(pwd->smb_nt_owf));
 226         DEBUG(100,("nt_sess_pwd: "));
 227         dump_data(100, (char *)pwd->smb_nt_pwd, sizeof(pwd->smb_nt_pwd));
 228 #endif
 229
 230         SMBOWFencrypt(pwd->smb_lm_pwd, cryptkey, pwd->smb_lm_owf);
 231
 232 #ifdef DEBUG_PASSWORD
 233         DEBUG(100,("lm_owf_passwd: "));
 234         dump_data(100, (char *)pwd->smb_lm_owf, sizeof(pwd->smb_lm_owf));
 235         DEBUG(100,("lm_sess_pwd: "));
 236         dump_data(100, (char *)pwd->smb_lm_pwd, sizeof(pwd->smb_lm_pwd));
 237 #endif
 238
 239         pwd->crypted = True;
 240 }
 241
 242 /****************************************************************************
 243  Gets lm and nt crypts.
 244 ****************************************************************************/
 245
 246 void pwd_get_lm_nt_owf(struct pwd_info *pwd, uchar lm_owf[24], uchar nt_owf[24])
 247 {
 248         if (lm_owf != NULL)
 249                 memcpy(lm_owf, pwd->smb_lm_owf, 24);
 250         if (nt_owf != NULL)
 251                 memcpy(nt_owf, pwd->smb_nt_owf, 24);
 252 }