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 #include "lib/util/string_wrappers.h"
  24
  25 #undef DBGC_CLASS
  26 #define DBGC_CLASS DBGC_AUTH
  27
  28 /**
  29  * Return a guest logon for anonymous users (username = "")
  30  *
  31  * Typically used as the first module in the auth chain, this allows
  32  * guest logons to be dealt with in one place.  Non-guest logons 'fail'
  33  * and pass onto the next module.
  34  **/
  35
  36 static NTSTATUS check_anonymous_security(const struct auth_context *auth_context,
  37                                 void *my_private_data,
  38                                 TALLOC_CTX *mem_ctx,
  39                                 const struct auth_usersupplied_info *user_info,
  40                                 struct auth_serversupplied_info **server_info)
  41 {
  42         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
  43
  44         if (user_info->mapped.account_name && *user_info->mapped.account_name) {
  45                 /* mark this as 'not for me' */
  46                 return NT_STATUS_NOT_IMPLEMENTED;
  47         }
  48
  49         switch (user_info->password_state) {
  50         case AUTH_PASSWORD_PLAIN:
  51                 if (user_info->password.plaintext != NULL &&
  52                     strlen(user_info->password.plaintext) > 0)
  53                 {
  54                         /* mark this as 'not for me' */
  55                         return NT_STATUS_NOT_IMPLEMENTED;
  56                 }
  57                 break;
  58         case AUTH_PASSWORD_HASH:
  59                 if (user_info->password.hash.lanman != NULL) {
  60                         /* mark this as 'not for me' */
  61                         return NT_STATUS_NOT_IMPLEMENTED;
  62                 }
  63                 if (user_info->password.hash.nt != NULL) {
  64                         /* mark this as 'not for me' */
  65                         return NT_STATUS_NOT_IMPLEMENTED;
  66                 }
  67                 break;
  68         case AUTH_PASSWORD_RESPONSE:
  69                 if (user_info->password.response.lanman.length == 1) {
  70                         if (user_info->password.response.lanman.data[0] != '\0') {
  71                                 /* mark this as 'not for me' */
  72                                 return NT_STATUS_NOT_IMPLEMENTED;
  73                         }
  74                 } else if (user_info->password.response.lanman.length > 1) {
  75                         /* mark this as 'not for me' */
  76                         return NT_STATUS_NOT_IMPLEMENTED;
  77                 }
  78                 if (user_info->password.response.nt.length > 0) {
  79                         /* mark this as 'not for me' */
  80                         return NT_STATUS_NOT_IMPLEMENTED;
  81                 }
  82                 break;
  83         }
  84
  85         return make_server_info_anonymous(NULL, server_info);
  86 }
  87
  88 /* Guest modules initialisation */
  89
  90 static NTSTATUS auth_init_anonymous(
  91         struct auth_context *auth_context,
  92         const char *options,
  93         struct auth_methods **auth_method)
  94 {
  95         struct auth_methods *result;
  96
  97         result = talloc_zero(auth_context, struct auth_methods);
  98         if (result == NULL) {
  99                 return NT_STATUS_NO_MEMORY;
 100         }
 101         result->auth = check_anonymous_security;
 102         result->name = "anonymous";
 103
 104         *auth_method = result;
 105         return NT_STATUS_OK;
 106 }
 107
 108 #ifdef DEVELOPER
 109 /**
 110  * Return an error based on username
 111  *
 112  * This function allows the testing of obsure errors, as well as the generation
 113  * of NT_STATUS -> DOS error mapping tables.
 114  *
 115  * This module is of no value to end-users.
 116  *
 117  * The password is ignored.
 118  *
 119  * @return An NTSTATUS value based on the username
 120  **/
 121
 122 static NTSTATUS check_name_to_ntstatus_security(const struct auth_context *auth_context,
 123                                                 void *my_private_data,
 124                                                 TALLOC_CTX *mem_ctx,
 125                                                 const struct auth_usersupplied_info *user_info,
 126                                                 struct auth_serversupplied_info **server_info)
 127 {
 128         NTSTATUS nt_status;
 129         fstring user;
 130         long error_num;
 131
 132         DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
 133
 134         fstrcpy(user, user_info->client.account_name);
 135
 136         if (strnequal("NT_STATUS", user, strlen("NT_STATUS"))) {
 137                 if (!strupper_m(user)) {
 138                         return NT_STATUS_INVALID_PARAMETER;
 139                 }
 140                 return nt_status_string_to_code(user);
 141         }
 142
 143         if (!strlower_m(user)) {
 144                 return NT_STATUS_INVALID_PARAMETER;
 145         }
 146         error_num = strtoul(user, NULL, 16);
 147
 148         DEBUG(5,("check_name_to_ntstatus_security: Error for user %s was %lx\n", user, error_num));
 149
 150         nt_status = NT_STATUS(error_num);
 151
 152         return nt_status;
 153 }
 154
 155 /** Module initialisation function */
 156
 157 static NTSTATUS auth_init_name_to_ntstatus(
 158         struct auth_context *auth_context,
 159         const char *param,
 160         struct auth_methods **auth_method)
 161 {
 162         struct auth_methods *result;
 163
 164         result = talloc_zero(auth_context, struct auth_methods);
 165         if (result == NULL) {
 166                 return NT_STATUS_NO_MEMORY;
 167         }
 168         result->auth = check_name_to_ntstatus_security;
 169         result->name = "name_to_ntstatus";
 170
 171         *auth_method = result;
 172         return NT_STATUS_OK;
 173 }
 174
 175 #endif /* DEVELOPER */
 176
 177 NTSTATUS auth_builtin_init(TALLOC_CTX *mem_ctx)
 178 {
 179         smb_register_auth(AUTH_INTERFACE_VERSION, "anonymous", auth_init_anonymous);
 180 #ifdef DEVELOPER
 181         smb_register_auth(AUTH_INTERFACE_VERSION, "name_to_ntstatus", auth_init_name_to_ntstatus);
 182 #endif
 183         return NT_STATUS_OK;
 184 }