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authorAndrew Bartlett <abartlet@samba.org>2011-05-08 14:48:11 +0200
committerAndrew Bartlett <abartlet@samba.org>2011-05-08 19:00:28 +0200
commitf52c6eeacc1131fca6656d07eca035668423b008 (patch)
tree33da57c9eac0f4f9eeaa2bd9ff734d265f2aba51
parenta47c7f6b4cfc8ce271cfd5addbf8f901d9ab3c6e (diff)
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s3-auth Add auth_samba4 module
This module makes a direct call into the Samba4 auth stack to authenticate Samba4 uses in a Samba3 file server. The direct call avoids the need to obtain schannel credentials. Andrew Bartlett Pair-Programmed-With: Andrew Tridgell <tridge@samba.org>
-rw-r--r--source3/auth/auth_samba4.c132
-rw-r--r--source3/auth/wscript_build9
2 files changed, 141 insertions, 0 deletions
diff --git a/source3/auth/auth_samba4.c b/source3/auth/auth_samba4.c
new file mode 100644
index 0000000000..57c07dd716
--- /dev/null
+++ b/source3/auth/auth_samba4.c
@@ -0,0 +1,132 @@
+/*
+ Unix SMB/CIFS implementation.
+ Authenticate against Samba4's auth subsystem
+ Copyright (C) Volker Lendecke 2008
+ Copyright (C) Andrew Bartlett 2010
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "source3/include/auth.h"
+#include "source4/auth/auth.h"
+#include "auth/auth_sam_reply.h"
+#include "param/param.h"
+#include "source4/lib/events/events.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+static NTSTATUS check_samba4_security(const struct auth_context *auth_context,
+ void *my_private_data,
+ TALLOC_CTX *mem_ctx,
+ const struct auth_usersupplied_info *user_info,
+ struct auth_serversupplied_info **server_info)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct netr_SamInfo3 *info3 = NULL;
+ NTSTATUS nt_status;
+ struct auth_user_info_dc *user_info_dc;
+ struct auth4_context *auth4_context;
+ struct loadparm_context *lp_ctx;
+ const char *config_file;
+
+ lp_ctx = loadparm_init(frame);
+ if (lp_ctx == NULL) {
+ DEBUG(10, ("loadparm_init failed\n"));
+ talloc_free(frame);
+ return NT_STATUS_INVALID_SERVER_STATE;
+ }
+
+ if (lp_loaded()) {
+ config_file = lp_configfile();
+ }
+ if (!config_file || !config_file[0]) {
+ config_file = get_dyn_CONFIGFILE();
+ }
+
+ if (!lpcfg_load(lp_ctx, config_file)) {
+ DEBUG(1, ("s4 lpcfg_load() of s3 config file %s failed", config_file));
+ talloc_free(frame);
+ return NT_STATUS_INVALID_SERVER_STATE;
+ }
+
+ /* We create a private tevent context here to avoid nested loops in
+ * the s3 one, as that may not be expected */
+ nt_status = auth_context_create(mem_ctx,
+ s4_event_context_init(frame), NULL,
+ lp_ctx,
+ &auth4_context);
+ NT_STATUS_NOT_OK_RETURN(nt_status);
+
+ nt_status = auth_context_set_challenge(auth4_context, auth_context->challenge.data, "auth_samba4");
+ NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
+
+ nt_status = auth_check_password(auth4_context, auth4_context, user_info, &user_info_dc);
+ NT_STATUS_NOT_OK_RETURN_AND_FREE(nt_status, auth4_context);
+
+ nt_status = auth_convert_user_info_dc_saminfo3(mem_ctx,
+ user_info_dc,
+ &info3);
+ if (NT_STATUS_IS_OK(nt_status)) {
+ /* We need the strings from the server_info to be valid as long as the info3 is around */
+ talloc_steal(info3, user_info_dc);
+ }
+ talloc_free(auth4_context);
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ goto done;
+ }
+
+ nt_status = make_server_info_info3(mem_ctx, user_info->client.account_name,
+ user_info->mapped.domain_name, server_info,
+ info3);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ DEBUG(10, ("make_server_info_info3 failed: %s\n",
+ nt_errstr(nt_status)));
+ TALLOC_FREE(frame);
+ return nt_status;
+ }
+
+ nt_status = NT_STATUS_OK;
+
+ done:
+ TALLOC_FREE(frame);
+ return nt_status;
+}
+
+/* module initialisation */
+static NTSTATUS auth_init_samba4(struct auth_context *auth_context,
+ const char *param,
+ auth_methods **auth_method)
+{
+ struct auth_methods *result;
+
+ result = TALLOC_ZERO_P(auth_context, struct auth_methods);
+ if (result == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ result->name = "samba4";
+ result->auth = check_samba4_security;
+
+ *auth_method = result;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS auth_samba4_init(void)
+{
+ smb_register_auth(AUTH_INTERFACE_VERSION, "samba4",
+ auth_init_samba4);
+ return NT_STATUS_OK;
+}
diff --git a/source3/auth/wscript_build b/source3/auth/wscript_build
index 8bf2051526..dc59c87c60 100644
--- a/source3/auth/wscript_build
+++ b/source3/auth/wscript_build
@@ -96,3 +96,12 @@ bld.SAMBA3_MODULE('auth_script',
init_function='',
internal_module=bld.SAMBA3_IS_STATIC_MODULE('auth_script'),
enabled=bld.SAMBA3_IS_ENABLED_MODULE('auth_script'))
+
+bld.SAMBA3_MODULE('auth_samba4',
+ subsystem='auth',
+ source='auth_samba4.c',
+ init_function='',
+ deps='auth4',
+ allow_undefined_symbols=False,
+ internal_module=bld.SAMBA3_IS_STATIC_MODULE('auth_samba4'),
+ enabled=bld.SAMBA3_IS_ENABLED_MODULE('auth_samba4'))