source3/auth/auth_builtin.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Generic authentication types
   4    Copyright (C) Andrew Bartlett         2001-2002
   5    Copyright (C) Jelmer Vernooij              2002
   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 3 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, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "auth.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_AUTH
  26
  27 /**
  28  * Return a guest logon for guest users (username = "")
  29  *
  30  * Typically used as the first module in the auth chain, this allows
  31  * guest logons to be dealt with in one place.  Non-guest logons 'fail'
  32  * and pass onto the next module.
  33  **/
  34
  35 static NTSTATUS check_guest_security(const struct auth_context *auth_context,
  36                                      void *my_private_data,
  37                                      TALLOC_CTX *mem_ctx,
  38                                      const struct auth_usersupplied_info *user_info,
  39                                      struct auth_serversupplied_info **server_info)
  40 {
  41         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
  42
  43         if (user_info->mapped.account_name && *user_info->mapped.account_name) {
  44                 /* mark this as 'not for me' */
  45                 return NT_STATUS_NOT_IMPLEMENTED;
  46         }
  47
  48         switch (user_info->password_state) {
  49         case AUTH_PASSWORD_PLAIN:
  50                 if (user_info->password.plaintext != NULL &&
  51                     strlen(user_info->password.plaintext) > 0)
  52                 {
  53                         /* mark this as 'not for me' */
  54                         return NT_STATUS_NOT_IMPLEMENTED;
  55                 }
  56                 break;
  57         case AUTH_PASSWORD_HASH:
  58                 if (user_info->password.hash.lanman != NULL) {
  59                         /* mark this as 'not for me' */
  60                         return NT_STATUS_NOT_IMPLEMENTED;
  61                 }
  62                 if (user_info->password.hash.nt != NULL) {
  63                         /* mark this as 'not for me' */
  64                         return NT_STATUS_NOT_IMPLEMENTED;
  65                 }
  66                 break;
  67         case AUTH_PASSWORD_RESPONSE:
  68                 if (user_info->password.response.lanman.length == 1) {
  69                         if (user_info->password.response.lanman.data[0] != '\0') {
  70                                 /* mark this as 'not for me' */
  71                                 return NT_STATUS_NOT_IMPLEMENTED;
  72                         }
  73                 } else if (user_info->password.response.lanman.length > 1) {
  74                         /* mark this as 'not for me' */
  75                         return NT_STATUS_NOT_IMPLEMENTED;
  76                 }
  77                 if (user_info->password.response.nt.length > 0) {
  78                         /* mark this as 'not for me' */
  79                         return NT_STATUS_NOT_IMPLEMENTED;
  80                 }
  81                 break;
  82         }
  83
  84         return make_server_info_guest(NULL, server_info);
  85 }
  86
  87 /* Guest modules initialisation */
  88
  89 static NTSTATUS auth_init_guest(struct auth_context *auth_context, const char *options, auth_methods **auth_method)
  90 {
  91         struct auth_methods *result;
  92
  93         result = talloc_zero(auth_context, struct auth_methods);
  94         if (result == NULL) {
  95                 return NT_STATUS_NO_MEMORY;
  96         }
  97         result->auth = check_guest_security;
  98         result->name = "guest";
  99
 100         *auth_method = result;
 101         return NT_STATUS_OK;
 102 }
 103
 104 #ifdef DEVELOPER
 105 /**
 106  * Return an error based on username
 107  *
 108  * This function allows the testing of obsure errors, as well as the generation
 109  * of NT_STATUS -> DOS error mapping tables.
 110  *
 111  * This module is of no value to end-users.
 112  *
 113  * The password is ignored.
 114  *
 115  * @return An NTSTATUS value based on the username
 116  **/
 117
 118 static NTSTATUS check_name_to_ntstatus_security(const struct auth_context *auth_context,
 119                                                 void *my_private_data,
 120                                                 TALLOC_CTX *mem_ctx,
 121                                                 const struct auth_usersupplied_info *user_info,
 122                                                 struct auth_serversupplied_info **server_info)
 123 {
 124         NTSTATUS nt_status;
 125         fstring user;
 126         long error_num;
 127
 128         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
 129
 130         fstrcpy(user, user_info->client.account_name);
 131
 132         if (strnequal("NT_STATUS", user, strlen("NT_STATUS"))) {
 133                 if (!strupper_m(user)) {
 134                         return NT_STATUS_INVALID_PARAMETER;
 135                 }
 136                 return nt_status_string_to_code(user);
 137         }
 138
 139         if (!strlower_m(user)) {
 140                 return NT_STATUS_INVALID_PARAMETER;
 141         }
 142         error_num = strtoul(user, NULL, 16);
 143
 144         DEBUG(5,("check_name_to_ntstatus_security: Error for user %s was %lx\n", user, error_num));
 145
 146         nt_status = NT_STATUS(error_num);
 147
 148         return nt_status;
 149 }
 150
 151 /** Module initialisation function */
 152
 153 static NTSTATUS auth_init_name_to_ntstatus(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
 154 {
 155         struct auth_methods *result;
 156
 157         result = talloc_zero(auth_context, struct auth_methods);
 158         if (result == NULL) {
 159                 return NT_STATUS_NO_MEMORY;
 160         }
 161         result->auth = check_name_to_ntstatus_security;
 162         result->name = "name_to_ntstatus";
 163
 164         *auth_method = result;
 165         return NT_STATUS_OK;
 166 }
 167
 168 #endif /* DEVELOPER */
 169
 170 NTSTATUS auth_builtin_init(void)
 171 {
 172         smb_register_auth(AUTH_INTERFACE_VERSION, "guest", auth_init_guest);
 173 #ifdef DEVELOPER
 174         smb_register_auth(AUTH_INTERFACE_VERSION, "name_to_ntstatus", auth_init_name_to_ntstatus);
 175 #endif
 176         return NT_STATUS_OK;
 177 }