2 Unix SMB/CIFS implementation.
4 Call out to a shell script for an authentication check.
6 Copyright (C) Jeremy Allison 2005.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
28 #define DBGC_CLASS DBGC_AUTH
30 /* Create a string containing the supplied :
33 * ascii hex challenge\n
34 * ascii hex LM response\n
35 * ascii hex NT response\n\0
36 * and execute a shell script to check this.
37 * Allows external programs to create users on demand.
38 * Script returns zero on success, non-zero on fail.
41 static NTSTATUS script_check_user_credentials(const struct auth_context *auth_context,
42 void *my_private_data,
44 const struct auth_usersupplied_info *user_info,
45 struct auth_serversupplied_info **server_info)
47 const char *script = lp_parm_const_string( GLOBAL_SECTION_SNUM, "auth_script", "script", NULL);
49 size_t secret_str_len;
54 return NT_STATUS_INVALID_PARAMETER;
58 return NT_STATUS_INVALID_PARAMETER;
62 DEBUG(3,("script_check_user_credentials: no auth_info !\n"));
63 return NT_STATUS_INVALID_PARAMETER;
66 secret_str_len = strlen(user_info->mapped.domain_name) + 1 +
67 strlen(user_info->client.account_name) + 1 +
68 16 + 1 + /* 8 bytes of challenge going to 16 */
69 48 + 1 + /* 24 bytes of challenge going to 48 */
72 secret_str = (char *)malloc(secret_str_len);
74 return NT_STATUS_NO_MEMORY;
77 if (strlcpy( secret_str, user_info->mapped.domain_name, secret_str_len) >= secret_str_len) {
81 if (strlcat( secret_str, "\n", secret_str_len) >= secret_str_len) {
85 if (strlcat( secret_str, user_info->client.account_name, secret_str_len) >= secret_str_len) {
89 if (strlcat( secret_str, "\n", secret_str_len) >= secret_str_len) {
94 for (i = 0; i < 8; i++) {
95 slprintf(&hex_str[i*2], 3, "%02X", auth_context->challenge.data[i]);
97 if (strlcat( secret_str, hex_str, secret_str_len) >= secret_str_len) {
101 if (strlcat( secret_str, "\n", secret_str_len) >= secret_str_len) {
106 if (user_info->password.response.lanman.data) {
107 for (i = 0; i < 24; i++) {
108 slprintf(&hex_str[i*2], 3, "%02X", user_info->password.response.lanman.data[i]);
110 if (strlcat( secret_str, hex_str, secret_str_len) >= secret_str_len) {
115 if (strlcat( secret_str, "\n", secret_str_len) >= secret_str_len) {
120 if (user_info->password.response.nt.data) {
121 for (i = 0; i < 24; i++) {
122 slprintf(&hex_str[i*2], 3, "%02X", user_info->password.response.nt.data[i]);
124 if (strlcat( secret_str, hex_str, secret_str_len) >= secret_str_len) {
129 if (strlcat( secret_str, "\n", secret_str_len) >= secret_str_len) {
134 DEBUG(10,("script_check_user_credentials: running %s with parameters:\n%s\n",
135 script, secret_str ));
137 ret = smbrunsecret( script, secret_str);
139 SAFE_FREE(secret_str);
142 DEBUG(1,("script_check_user_credentials: failed to authenticate %s\\%s\n",
143 user_info->mapped.domain_name, user_info->client.account_name ));
145 return NT_STATUS_NO_SUCH_USER;
148 /* Cause the auth system to keep going.... */
149 return NT_STATUS_NOT_IMPLEMENTED;
153 SAFE_FREE(secret_str);
154 return NT_STATUS_NO_MEMORY;
157 /* module initialisation */
158 static NTSTATUS auth_init_script(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
160 struct auth_methods *result;
162 result = talloc_zero(auth_context, struct auth_methods);
163 if (result == NULL) {
164 return NT_STATUS_NO_MEMORY;
166 result->name = "script";
167 result->auth = script_check_user_credentials;
169 if (param && *param) {
170 /* we load the 'fallback' module - if script isn't here, call this
173 if (!load_auth_module(auth_context, param, &priv)) {
174 return NT_STATUS_UNSUCCESSFUL;
176 result->private_data = (void *)priv;
179 *auth_method = result;
183 NTSTATUS auth_script_init(void);
184 NTSTATUS auth_script_init(void)
186 return smb_register_auth(AUTH_INTERFACE_VERSION, "script", auth_init_script);