Add a test to explore Netlogon PAC validation

However, I have still not figured out this protocol yet, and the docs
are rather unclear... :-(

Andrew Bartlett
(This used to be commit d878643071a1477435a267e2944461d367cdfa79)

4 files changed, 234 insertions, 3 deletions

diff --git a/source4/torture/rpc/netlogon.c b/source4/torture/rpc/netlogon.c
index 5b92ce1382..5ec2c29a20 100644
--- a/source4/torture/rpc/netlogon.c
+++ b/source4/torture/rpc/netlogon.c
@@ -25,8 +25,10 @@
 #include "torture/torture.h"
 #include "lib/events/events.h"
 #include "auth/auth.h"
+#include "auth/gensec/gensec.h"
 #include "lib/cmdline/popt_common.h"
 #include "torture/rpc/rpc.h"
+#include "torture/rpc/netlogon.h"
 #include "libcli/auth/libcli_auth.h"
 #include "librpc/gen_ndr/ndr_netlogon_c.h"
 #include "librpc/gen_ndr/ndr_lsa_c.h"
@@ -67,8 +69,8 @@ static bool test_LogonUasLogoff(struct torture_context *tctx,
 }
 
 static bool test_SetupCredentials(struct dcerpc_pipe *p, struct torture_context *tctx,
-			   struct cli_credentials *credentials,
-			   struct creds_CredentialState **creds_out)
+				  struct cli_credentials *credentials,
+				  struct creds_CredentialState **creds_out)
 {
 	NTSTATUS status;
 	struct netr_ServerReqChallenge r;
@@ -113,6 +115,13 @@ static bool test_SetupCredentials(struct dcerpc_pipe *p, struct torture_context
 	torture_comment(tctx, "Testing ServerAuthenticate\n");
 
 	status = dcerpc_netr_ServerAuthenticate(p, tctx, &a);
+
+	/* This allows the tests to continue against the more fussy windows 2008 */
+	if (NT_STATUS_EQUAL(status, NT_STATUS_DOWNGRADE_DETECTED)) {
+		return test_SetupCredentials2(p, tctx, NETLOGON_NEG_AUTH2_ADS_FLAGS, 
+					      credentials, SEC_CHAN_BDC, creds_out);
+	}
+
 	torture_assert_ntstatus_ok(tctx, status, "ServerAuthenticate");
 
 	torture_assert(tctx, creds_client_check(creds, &credentials3), 
@@ -122,7 +131,7 @@ static bool test_SetupCredentials(struct dcerpc_pipe *p, struct torture_context
 	return true;
 }
 
-static bool test_SetupCredentials2(struct dcerpc_pipe *p, struct torture_context *tctx,
+bool test_SetupCredentials2(struct dcerpc_pipe *p, struct torture_context *tctx,
 			    uint32_t negotiate_flags,
 			    struct cli_credentials *machine_credentials,
 			    int sec_chan_type,
diff --git a/source4/torture/rpc/remote_pac.c b/source4/torture/rpc/remote_pac.c
new file mode 100644
index 0000000000..a9e0bbca64
--- /dev/null
+++ b/source4/torture/rpc/remote_pac.c
@@ -0,0 +1,220 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   test suite for netlogon PAC operations
+
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
+   
+   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 "torture/torture.h"
+#include "lib/events/events.h"
+#include "auth/auth.h"
+#include "auth/gensec/gensec.h"
+#include "lib/cmdline/popt_common.h"
+#include "torture/rpc/rpc.h"
+#include "torture/rpc/netlogon.h"
+#include "libcli/auth/libcli_auth.h"
+#include "librpc/gen_ndr/ndr_netlogon_c.h"
+#include "librpc/gen_ndr/ndr_krb5pac.h"
+#include "param/param.h"
+#include "lib/messaging/irpc.h"
+#include "cluster/cluster.h"
+
+#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
+#include "librpc/gen_ndr/krb5pac.h"
+#include <gssapi/gssapi.h>
+#include <gssapi/gssapi_krb5.h>
+#include "auth/gensec/gensec_gssapi.h"
+
+#define TEST_MACHINE_NAME "torturepactest"
+
+/* Check to see if we can pass the PAC across to the NETLOGON server for validation */
+
+/* Also happens to be a really good one-step verfication of our Kerberos stack */
+
+static bool test_PACVerify(struct torture_context *tctx, 
+			   struct dcerpc_pipe *p,
+			   struct cli_credentials *credentials)
+{
+	NTSTATUS status;
+
+	struct netr_LogonSamLogon r;
+	
+	struct netr_GenericInfo generic;
+	struct netr_Authenticator auth, auth2;
+	
+
+	struct creds_CredentialState *creds;
+	struct gensec_security *gensec_client_context;
+	struct gensec_security *gensec_server_context;
+	struct gensec_gssapi_state *gensec_gssapi_state;
+
+	struct messaging_context *msg_server_ctx;
+	DATA_BLOB client_to_server, server_to_client, pac_blob, pac_wrapped;
+	gss_buffer_desc pac;
+	struct PAC_Validate pac_wrapped_struct;
+	
+	enum ndr_err_code ndr_err;
+
+	struct auth_session_info *session_info;
+
+	char *tmp_dir;
+	OM_uint32 maj_stat, min_stat;
+
+	TALLOC_CTX *tmp_ctx = talloc_new(tctx);
+	
+	torture_assert(tctx, tmp_ctx != NULL, "talloc_new() failed");
+
+	if (!test_SetupCredentials2(p, tctx, NETLOGON_NEG_AUTH2_ADS_FLAGS, 
+				    credentials, SEC_CHAN_BDC, 
+				    &creds)) {
+		return false;
+	}
+
+	status = torture_temp_dir(tctx, "PACVerify", &tmp_dir);
+	torture_assert_ntstatus_ok(tctx, status, "torture_temp_dir failed");
+
+	msg_server_ctx = messaging_init(tctx, 
+					tmp_dir,
+					cluster_id(0, 1), 
+				        lp_iconv_convenience(tctx->lp_ctx),
+					tctx->ev);
+	
+	torture_assert(tctx, msg_server_ctx != NULL, "Failed to init messaging context");
+
+	status = gensec_client_start(tctx, &gensec_client_context, tctx->ev, tctx->lp_ctx);
+	torture_assert_ntstatus_ok(tctx, status, "gensec_client_start (client) failed");
+
+	status = gensec_set_target_hostname(gensec_client_context, TEST_MACHINE_NAME);
+
+	status = gensec_set_credentials(gensec_client_context, cmdline_credentials);
+	torture_assert_ntstatus_ok(tctx, status, "gensec_set_credentials (client) failed");
+
+	status = gensec_start_mech_by_sasl_name(gensec_client_context, "GSSAPI");
+	torture_assert_ntstatus_ok(tctx, status, "gensec_start_mech_by_sasl_name (client) failed");
+
+	status = gensec_server_start(tctx, tctx->ev, tctx->lp_ctx, msg_server_ctx, &gensec_server_context);
+	torture_assert_ntstatus_ok(tctx, status, "gensec_server_start (server) failed");
+
+	status = gensec_set_credentials(gensec_server_context, credentials);
+	torture_assert_ntstatus_ok(tctx, status, "gensec_set_credentials (server) failed");
+
+	status = gensec_start_mech_by_sasl_name(gensec_server_context, "GSSAPI");
+	torture_assert_ntstatus_ok(tctx, status, "gensec_start_mech_by_sasl_name (server) failed");
+
+	server_to_client = data_blob(NULL, 0);
+	
+	do {
+		/* Do a client-server update dance */
+		status = gensec_update(gensec_client_context, tmp_ctx, server_to_client, &client_to_server);
+		if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {;
+			torture_assert_ntstatus_ok(tctx, status, "gensec_update (client) failed");
+		}
+
+		if (client_to_server.length == 0) {
+			break;
+		}
+
+		status = gensec_update(gensec_server_context, tmp_ctx, client_to_server, &server_to_client);
+		if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {;
+			torture_assert_ntstatus_ok(tctx, status, "gensec_update (server) failed");
+		}
+
+		if (server_to_client.length == 0) {
+			break;
+		}
+	} while (1);
+
+	/* Extract the PAC using Samba's code */
+
+	status = gensec_session_info(gensec_server_context, &session_info);
+	torture_assert_ntstatus_ok(tctx, status, "gensec_gssapi_session_info failed");
+	
+	/* Extract a raw PAC */
+
+	gensec_gssapi_state = talloc_get_type(gensec_server_context->private_data, struct gensec_gssapi_state);
+
+	maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat, 
+							       gensec_gssapi_state->gssapi_context, 
+							       KRB5_AUTHDATA_WIN2K_PAC,
+							       &pac);
+	
+	if (maj_stat == 0) {
+		pac_blob = data_blob_talloc(tmp_ctx, pac.value, pac.length);
+		gss_release_buffer(&min_stat, &pac);
+
+	} else {
+		pac_blob = data_blob(NULL, 0);
+	}
+
+	pac_wrapped_struct.MessageType = 0x3;
+	pac_wrapped_struct.ChecksumLength = pac_blob.length;
+	pac_wrapped_struct.SignatureType = 0;
+	pac_wrapped_struct.SignatureLength = 0;
+	pac_wrapped_struct.data = pac_blob.data;
+
+	ndr_err = ndr_push_struct_blob(&pac_wrapped, tmp_ctx, lp_iconv_convenience(tctx->lp_ctx), &pac_wrapped_struct,
+				       (ndr_push_flags_fn_t)ndr_push_PAC_Validate);
+	torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err), "ndr_push_struct_blob of PACValidate structure failed");
+		
+	
+	/* Validate it over the netlogon pipe */
+
+	generic.identity_info.parameter_control = 0;
+	generic.identity_info.logon_id_high = 0;
+	generic.identity_info.logon_id_low = 0;
+	generic.identity_info.domain_name.string = session_info->server_info->domain_name;
+	generic.identity_info.account_name.string = session_info->server_info->account_name;
+	generic.identity_info.workstation.string = TEST_MACHINE_NAME;
+
+	generic.package_name.string = "Kerberos";
+	generic.length = pac_wrapped.length;
+	generic.data = pac_wrapped.data;
+
+	ZERO_STRUCT(auth2);
+	creds_client_authenticator(creds, &auth);
+	r.in.credential = &auth;
+	r.in.return_authenticator = &auth2;
+	r.in.logon_level = NetlogonGenericInformation;
+	r.in.logon.generic = &generic;
+	r.in.server_name = talloc_asprintf(tctx, "\\\\%s", dcerpc_server_name(p));
+	r.in.computer_name = cli_credentials_get_workstation(credentials);
+	r.in.validation_level = NetlogonValidationGenericInfo2;
+
+	status = dcerpc_netr_LogonSamLogon(p, tctx, &r);
+
+	torture_assert_ntstatus_ok(tctx, status, "LogonSamLogon failed");
+	
+	torture_assert(tctx, creds_client_check(creds, &r.out.return_authenticator->cred), 
+		       "Credential chaining failed");
+
+	return true;
+}
+
+struct torture_suite *torture_rpc_remote_pac(TALLOC_CTX *mem_ctx)
+{
+	struct torture_suite *suite = torture_suite_create(mem_ctx, "PAC");
+	struct torture_rpc_tcase *tcase;
+	struct torture_test *test;
+
+	tcase = torture_suite_add_machine_rpc_iface_tcase(suite, "netlogon", 
+						  &ndr_table_netlogon, TEST_MACHINE_NAME);
+	torture_rpc_tcase_add_test_creds(tcase, "verify", test_PACVerify);
+
+	return suite;
+}
diff --git a/source4/torture/rpc/rpc.c b/source4/torture/rpc/rpc.c
index 23867f2a77..85f7bde16c 100644
--- a/source4/torture/rpc/rpc.c
+++ b/source4/torture/rpc/rpc.c
@@ -395,6 +395,7 @@ NTSTATUS torture_rpc_init(void)
 	torture_suite_add_simple_test(suite, "SAMR-USERS", torture_rpc_samr_users);
 	torture_suite_add_simple_test(suite, "SAMR-PASSWORDS", torture_rpc_samr_passwords);
 	torture_suite_add_suite(suite, torture_rpc_netlogon(suite));
+	torture_suite_add_suite(suite, torture_rpc_remote_pac(suite));
 	torture_suite_add_simple_test(suite, "SAMLOGON", torture_rpc_samlogon);
 	torture_suite_add_simple_test(suite, "SAMSYNC", torture_rpc_samsync);
 	torture_suite_add_simple_test(suite, "SCHANNEL", torture_rpc_schannel);
diff --git a/source4/torture/rpc/testjoin.c b/source4/torture/rpc/testjoin.c
index 9fd9d2f0c6..2af8c4f872 100644
--- a/source4/torture/rpc/testjoin.c
+++ b/source4/torture/rpc/testjoin.c
@@ -400,6 +400,7 @@ _PUBLIC_ struct test_join *torture_join_domain(struct torture_context *tctx,
 	}
 	cli_credentials_set_username(*machine_credentials, libnet_r->in.account_name, CRED_SPECIFIED);
 	cli_credentials_set_password(*machine_credentials, libnet_r->out.join_password, CRED_SPECIFIED);
+	cli_credentials_set_kvno(*machine_credentials, libnet_r->out.kvno);
 	if (acct_flags & ACB_SVRTRUST) {
 		cli_credentials_set_secure_channel_type(*machine_credentials,
 							SEC_CHAN_BDC);