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authorJeremy Allison <jra@samba.org>2005-09-14 23:58:14 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 11:03:38 -0500
commit418e92d06da0638d92c48ffd310a409c89e2fa48 (patch)
tree26568c796d59b73daadaa19101c279da06f7a1b0 /source3/auth
parenta9b96c6b3d2fa111c2210b57fa816fcbc1946fc5 (diff)
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r10234: Add new auth module "auth_script" to allow valid users to
be provisioned on demand - calls script with domain, username, challenge and LM and NT responses - passing the info through a pipe. Jeremy. (This used to be commit 67be4ee41cd244bcc0445cac7c9e1e2d40e93c9b)
Diffstat (limited to 'source3/auth')
-rw-r--r--source3/auth/auth_script.c155
1 files changed, 155 insertions, 0 deletions
diff --git a/source3/auth/auth_script.c b/source3/auth/auth_script.c
new file mode 100644
index 0000000000..1a715fca31
--- /dev/null
+++ b/source3/auth/auth_script.c
@@ -0,0 +1,155 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Call out to a shell script for an authentication check.
+
+ Copyright (C) Jeremy Allison 2005.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+#undef malloc
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/* Create a string containing the supplied :
+ * domain\n
+ * user\n
+ * ascii hex challenge\n
+ * ascii hex LM response\n
+ * ascii hex NT response\n\0
+ * and execute a shell script to check this.
+ * Allows external programs to create users on demand.
+ * Script returns zero on success, non-zero on fail.
+ */
+
+static NTSTATUS script_check_user_credentials(const struct auth_context *auth_context,
+ void *my_private_data,
+ TALLOC_CTX *mem_ctx,
+ const auth_usersupplied_info *user_info,
+ auth_serversupplied_info **server_info)
+{
+ const char *script = lp_parm_const_string( GLOBAL_SECTION_SNUM, "auth_script", "script", NULL);
+ char *secret_str;
+ size_t secret_str_len;
+ char hex_str[49];
+ int ret, i;
+
+ if (!script) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (!user_info) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (!auth_context) {
+ DEBUG(3,("script_check_user_credentials: no auth_info !\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ secret_str_len = strlen(user_info->domain.str) + 1 +
+ strlen(user_info->smb_name.str) + 1 +
+ 16 + 1 + /* 8 bytes of challenge going to 16 */
+ 48 + 1 + /* 24 bytes of challenge going to 48 */
+ 48 + 1;
+
+ secret_str = malloc(secret_str_len);
+ if (!secret_str) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ safe_strcpy( secret_str, user_info->domain.str, secret_str_len - 1);
+ safe_strcat( secret_str, "\n", secret_str_len - 1);
+ safe_strcat( secret_str, user_info->smb_name.str, secret_str_len - 1);
+ safe_strcat( secret_str, "\n", secret_str_len - 1);
+
+ for (i = 0; i < 8; i++) {
+ slprintf(&hex_str[i*2], 3, "%02X", auth_context->challenge.data[i]);
+ }
+ safe_strcat( secret_str, hex_str, secret_str_len - 1);
+ safe_strcat( secret_str, "\n", secret_str_len - 1);
+
+ if (user_info->lm_resp.data) {
+ for (i = 0; i < 24; i++) {
+ slprintf(&hex_str[i*2], 3, "%02X", user_info->lm_resp.data[i]);
+ }
+ safe_strcat( secret_str, hex_str, secret_str_len - 1);
+ }
+ safe_strcat( secret_str, "\n", secret_str_len - 1);
+
+ if (user_info->nt_resp.data) {
+ for (i = 0; i < 24; i++) {
+ slprintf(&hex_str[i*2], 3, "%02X", user_info->nt_resp.data[i]);
+ }
+ safe_strcat( secret_str, hex_str, secret_str_len - 1);
+ }
+ safe_strcat( secret_str, "\n", secret_str_len - 1);
+
+ DEBUG(10,("script_check_user_credentials: running %s with parameters:\n%s\n",
+ script, secret_str ));
+
+ ret = smbrunsecret( script, secret_str);
+
+ SAFE_FREE(secret_str);
+
+ if (ret) {
+ DEBUG(1,("script_check_user_credentials: failed to authenticate %s\\%s\n",
+ user_info->domain.str, user_info->smb_name.str ));
+ /* auth failed. */
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ /* Cause the auth system to keep going.... */
+ return NT_STATUS_NOT_IMPLEMENTED;
+}
+
+/* module initialisation */
+static NTSTATUS auth_init_script(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
+{
+ if (!make_auth_methods(auth_context, auth_method)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ (*auth_method)->name = "script";
+ (*auth_method)->auth = script_check_user_credentials;
+
+ if (param && *param) {
+ /* we load the 'fallback' module - if script isn't here, call this
+ module */
+ if (!load_auth_module(auth_context, param, (auth_methods **)&(*auth_method)->private_data)) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ }
+ return NT_STATUS_OK;
+}
+
+#if 0
+/* Define this to build static. */
+NTSTATUS auth_script_init(void)
+{
+ return smb_register_auth(AUTH_INTERFACE_VERSION, "script", auth_init_script);
+}
+#else
+/* Define this to build shared. */
+NTSTATUS init_module(void)
+{
+ return smb_register_auth(AUTH_INTERFACE_VERSION, "script", auth_init_script);
+}
+#endif