s4-torture Add tests for DES-only accounts PAC behaviour/validation.

Previously we didn't support DES-only in a Samba4 domain.  This is
important for some legacy systems that have not yet migrated from this
weak crypto.

Andrew Bartlett

source4/torture/rpc/remote_pac.c

@@ -23,15 +23,21 @@
 #include "auth/auth.h"
 #include "auth/auth_sam_reply.h"
 #include "auth/gensec/gensec.h"
+#include "system/kerberos.h"
+#include "auth/kerberos/kerberos.h"
+#include "auth/credentials/credentials.h"
+#include "auth/credentials/credentials_krb5.h"
 #include "lib/cmdline/popt_common.h"
 #include "torture/rpc/torture_rpc.h"
 #include "libcli/auth/libcli_auth.h"
 #include "libcli/security/security.h"
 #include "librpc/gen_ndr/ndr_netlogon_c.h"
+#include "librpc/gen_ndr/ndr_samr_c.h"
 #include "param/param.h"
 
 #define TEST_MACHINE_NAME_BDC "torturepacbdc"
 #define TEST_MACHINE_NAME_WKSTA "torturepacwksta"
+#define TEST_MACHINE_NAME_WKSTA_DES "torturepacwkdes"
 #define TEST_MACHINE_NAME_S2U4SELF_BDC "tests2u4selfbdc"
 #define TEST_MACHINE_NAME_S2U4SELF_WKSTA "tests2u4selfwk"
 
@@ -57,7 +63,6 @@ static bool test_PACVerify(struct torture_context *tctx,
 	struct netr_GenericInfo generic;
 	struct netr_Authenticator auth, auth2;
 
-
 	struct netlogon_creds_CredentialState *creds;
 	struct gensec_security *gensec_client_context;
 	struct gensec_security *gensec_server_context;
@@ -71,9 +76,7 @@ static bool test_PACVerify(struct torture_context *tctx,
 
 	char *tmp_dir;
 	struct dcerpc_binding_handle *b = p->binding_handle;
-
 	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, 
@@ -347,6 +350,38 @@ static bool test_PACVerify_workstation(struct torture_context *tctx,
 	return test_PACVerify(tctx, p, credentials, SEC_CHAN_WKSTA, TEST_MACHINE_NAME_WKSTA);
 }
 
+static bool test_PACVerify_workstation_des(struct torture_context *tctx,
+					   struct dcerpc_pipe *p, struct cli_credentials *credentials, struct test_join *join_ctx)
+{
+	struct samr_SetUserInfo r;
+	union samr_UserInfo user_info;
+	struct dcerpc_pipe *samr_pipe = torture_join_samr_pipe(join_ctx);
+	struct smb_krb5_context *smb_krb5_context;
+	krb5_error_code ret;
+
+	ret = cli_credentials_get_krb5_context(cmdline_credentials, tctx->lp_ctx, &smb_krb5_context);
+	torture_assert_int_equal(tctx, ret, 0, "cli_credentials_get_krb5_context() failed");
+
+	if (krb5_config_get_bool_default(smb_krb5_context->krb5_context, NULL, FALSE,
+					 "libdefaults",
+					 "allow_weak_crypto", NULL) == FALSE) {
+		torture_skip(tctx, "Cannot test DES without [libdefaults] allow_weak_crypto = yes");
+	}
+
+	/* Mark this workstation with DES-only */
+	user_info.info16.acct_flags = ACB_USE_DES_KEY_ONLY | ACB_WSTRUST;
+	r.in.user_handle = torture_join_samr_user_policy(join_ctx);
+	r.in.level = 16;
+	r.in.info = &user_info;
+
+	torture_assert_ntstatus_ok(tctx, dcerpc_samr_SetUserInfo_r(samr_pipe->binding_handle, tctx, &r),
+		"failed to set DES info account flags");
+	torture_assert_ntstatus_ok(tctx, r.out.result,
+		"failed to set DES into account flags");
+
+	return test_PACVerify(tctx, p, credentials, SEC_CHAN_WKSTA, TEST_MACHINE_NAME_WKSTA_DES);
+}
+
 
 /* Check various ways to get the PAC, in particular check the group membership and other details between the PAC from a normal kinit, S2U4Self and a SamLogon */
 static bool test_S2U4Self(struct torture_context *tctx,
@@ -625,6 +660,10 @@ struct torture_suite *torture_rpc_remote_pac(TALLOC_CTX *mem_ctx)
 								      &ndr_table_netlogon, TEST_MACHINE_NAME_WKSTA);
 	torture_rpc_tcase_add_test_creds(tcase, "verify-sig", test_PACVerify_workstation);
 
+	tcase = torture_suite_add_machine_workstation_rpc_iface_tcase(suite, "netlogon-member-des",
+								      &ndr_table_netlogon, TEST_MACHINE_NAME_WKSTA_DES);
+	torture_rpc_tcase_add_test_join(tcase, "verify-sig", test_PACVerify_workstation_des);
+
 	tcase = torture_suite_add_machine_bdc_rpc_iface_tcase(suite, "netlogon-bdc",
 							      &ndr_table_netlogon, TEST_MACHINE_NAME_S2U4SELF_BDC);
 	torture_rpc_tcase_add_test_creds(tcase, "s2u4self", test_S2U4Self_bdc);

source4/torture/rpc/rpc.c

@@ -352,6 +352,19 @@ static bool torture_rpc_wrap_test_creds(struct torture_context *tctx,
 	return fn(tctx, tcase_data->pipe, tcase_data->credentials);
 }
 
+static bool torture_rpc_wrap_test_join(struct torture_context *tctx,
+				       struct torture_tcase *tcase,
+				       struct torture_test *test)
+{
+	bool (*fn) (struct torture_context *, struct dcerpc_pipe *, struct cli_credentials *, struct test_join *);
+	struct torture_rpc_tcase_data *tcase_data =
+		(struct torture_rpc_tcase_data *)tcase->data;
+
+	fn = test->fn;
+
+	return fn(tctx, tcase_data->pipe, tcase_data->credentials, tcase_data->join_ctx);
+}
+
 _PUBLIC_ struct torture_test *torture_rpc_tcase_add_test(
 					struct torture_rpc_tcase *tcase, 
 					const char *name, 
@@ -394,6 +407,28 @@ _PUBLIC_ struct torture_test *torture_rpc_tcase_add_test_creds(
 	return test;
 }
 
+_PUBLIC_ struct torture_test *torture_rpc_tcase_add_test_join(
+					struct torture_rpc_tcase *tcase,
+					const char *name,
+					bool (*fn) (struct torture_context *, struct dcerpc_pipe *,
+						    struct cli_credentials *, struct test_join *))
+{
+	struct torture_test *test;
+
+	test = talloc(tcase, struct torture_test);
+
+	test->name = talloc_strdup(test, name);
+	test->description = NULL;
+	test->run = torture_rpc_wrap_test_join;
+	test->dangerous = false;
+	test->data = NULL;
+	test->fn = fn;
+
+	DLIST_ADD(tcase->tcase.tests, test);
+
+	return test;
+}
+
 _PUBLIC_ struct torture_test *torture_rpc_tcase_add_test_ex(
 					struct torture_rpc_tcase *tcase, 
 					const char *name, 

source4/torture/rpc/torture_rpc.h

@@ -64,6 +64,12 @@ struct torture_rpc_tcase *torture_suite_add_anon_rpc_iface_tcase(struct torture_
 								const char *name,
 								const struct ndr_interface_table *table);
 
+struct torture_test *torture_rpc_tcase_add_test_join(
+	struct torture_rpc_tcase *tcase,
+	const char *name,
+	bool (*fn) (struct torture_context *, struct dcerpc_pipe *,
+		    struct cli_credentials *, struct test_join *));
+
 struct torture_test *torture_rpc_tcase_add_test_ex(
 					struct torture_rpc_tcase *tcase, 
 					const char *name,