From 418e92d06da0638d92c48ffd310a409c89e2fa48 Mon Sep 17 00:00:00 2001 From: Jeremy Allison Date: Wed, 14 Sep 2005 23:58:14 +0000 Subject: 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) --- source3/auth/auth_script.c | 155 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 source3/auth/auth_script.c (limited to 'source3/auth') 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 -- cgit