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r10234: Add new auth module "auth_script" to allow valid users to

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be provisioned on demand - calls script with domain,
username, challenge and LM and NT responses - passing
the info through a pipe.
Jeremy.
This commit is contained in:
Jeremy Allison 2005-09-14 23:58:14 +00:00 committed by Gerald (Jerry) Carter
parent 2490118796
commit 67be4ee41c
4 changed files with 164 additions and 3 deletions
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5
source/Makefile.in
View File

@ -368,6 +368,7 @@ AUTH_RHOSTS_OBJ = auth/auth_rhosts.o
AUTH_SERVER_OBJ = auth/auth_server.o
AUTH_UNIX_OBJ = auth/auth_unix.o
AUTH_WINBIND_OBJ = auth/auth_winbind.o
AUTH_SCRIPT_OBJ = auth/auth_script.o
AUTH_OBJ = auth/auth.o @AUTH_STATIC@ auth/auth_util.o auth/auth_compat.o \
auth/auth_ntlmssp.o \
@ -1165,6 +1166,10 @@ bin/domain.@SHLIBEXT@: $(AUTH_DOMAIN_OBJ:.o=.@PICSUFFIX@)
@echo "Building plugin $@"
@$(SHLD) $(LDSHFLAGS) -o $@ $(AUTH_DOMAIN_OBJ:.o=.@PICSUFFIX@) @SONAMEFLAG@`basename $@`
bin/script.@SHLIBEXT@: $(AUTH_SCRIPT_OBJ:.o=.@PICSUFFIX@)
@echo "Building plugin $@"
@$(SHLD) $(LDSHFLAGS) -o $@ $(AUTH_SCRIPT_OBJ:.o=.@PICSUFFIX@) @SONAMEFLAG@`basename $@`
bin/smbserver.@SHLIBEXT@: $(AUTH_SERVER_OBJ:.o=.@PICSUFFIX@)
@echo "Building plugin $@"
@$(SHLD) $(LDSHFLAGS) -o $@ $(AUTH_SERVER_OBJ:.o=.@PICSUFFIX@) @SONAMEFLAG@`basename $@`

155
source/auth/auth_script.c Normal file
View File

@ -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

3
source/configure.in
View File

@ -460,7 +460,7 @@ dnl These have to be built static:
default_static_modules="pdb_smbpasswd pdb_tdbsam rpc_lsa rpc_samr rpc_reg rpc_lsa_ds rpc_wks rpc_svcctl rpc_net rpc_dfs rpc_srv rpc_spoolss rpc_eventlog auth_rhosts auth_sam auth_unix auth_winbind auth_server auth_domain auth_builtin printerdb_file"
dnl These are preferably build shared, and static if dlopen() is not available
default_shared_modules="vfs_recycle vfs_audit vfs_extd_audit vfs_full_audit vfs_netatalk vfs_fake_perms vfs_default_quota vfs_readonly vfs_cap vfs_expand_msdfs vfs_shadow_copy charset_CP850 charset_CP437"
default_shared_modules="vfs_recycle vfs_audit vfs_extd_audit vfs_full_audit vfs_netatalk vfs_fake_perms vfs_default_quota vfs_readonly vfs_cap vfs_expand_msdfs vfs_shadow_copy charset_CP850 charset_CP437 auth_script"
if test "x$developer" = xyes; then
default_static_modules="$default_static_modules rpc_echo"
@ -4973,6 +4973,7 @@ SMB_MODULE(auth_winbind, \$(AUTH_WINBIND_OBJ), "bin/winbind.$SHLIBEXT", AUTH)
SMB_MODULE(auth_server, \$(AUTH_SERVER_OBJ), "bin/smbserver.$SHLIBEXT", AUTH)
SMB_MODULE(auth_domain, \$(AUTH_DOMAIN_OBJ), "bin/domain.$SHLIBEXT", AUTH)
SMB_MODULE(auth_builtin, \$(AUTH_BUILTIN_OBJ), "bin/builtin.$SHLIBEXT", AUTH)
SMB_MODULE(auth_script, \$(AUTH_SCRIPT_OBJ), "bin/script.$SHLIBEXT", AUTH)
SMB_SUBSYSTEM(AUTH,auth/auth.o)
SMB_MODULE(vfs_recycle, \$(VFS_RECYCLE_OBJ), "bin/recycle.$SHLIBEXT", VFS)

4
source/lib/smbrun.c
View File

@ -55,7 +55,7 @@ run a command being careful about uid/gid handling and putting the output in
outfd (or discard it if outfd is NULL).
****************************************************************************/
int smbrun(char *cmd, int *outfd)
int smbrun(const char *cmd, int *outfd)
{
pid_t pid;
uid_t uid = current_user.uid;
@ -186,7 +186,7 @@ outfd (or discard it if outfd is NULL).
sends the provided secret to the child stdin.
****************************************************************************/
int smbrunsecret(char *cmd, char *secret)
int smbrunsecret(const char *cmd, const char *secret)
{
pid_t pid;
uid_t uid = current_user.uid;