samba-mirror/source4/torture/krb5/kdc-canon-heimdal.c

/*
   Unix SMB/CIFS implementation.

   Validate the krb5 pac generation routines

   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2015

   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 "system/kerberos.h"
#include "torture/smbtorture.h"
#include "torture/krb5/proto.h"
#include "auth/credentials/credentials.h"
#include "lib/cmdline/popt_common.h"
#include "source4/auth/kerberos/kerberos.h"
#include "source4/auth/kerberos/kerberos_util.h"
#include "lib/util/util_net.h"
#include "auth/auth.h"
#include "auth/auth_sam_reply.h"
#include "auth/gensec/gensec.h"
#include "param/param.h"

#define TEST_CANONICALIZE     0x0000001
#define TEST_ENTERPRISE       0x0000002
#define TEST_UPPER_REALM      0x0000004
#define TEST_UPPER_USERNAME   0x0000008
#define TEST_NETBIOS_REALM    0x0000010
#define TEST_WIN2K            0x0000020
#define TEST_UPN              0x0000040
#define TEST_S4U2SELF         0x0000080
#define TEST_REMOVEDOLLAR     0x0000100
#define TEST_ALL              0x00001FF

struct test_data {
	const char *test_name;
	const char *realm;
	const char *real_realm;
	const char *real_domain;
	const char *username;
	const char *real_username;
	bool canonicalize;
	bool enterprise;
	bool upper_realm;
	bool upper_username;
	bool netbios_realm;
	bool win2k;
	bool upn;
	bool other_upn_suffix;
	bool s4u2self;
	bool removedollar;
	const char *krb5_service;
	const char *krb5_hostname;
};

enum test_stage {
	TEST_AS_REQ = 0,
	TEST_TGS_REQ_KRBTGT_CANON = 1,
	TEST_TGS_REQ_CANON = 2,
	TEST_SELF_TRUST_TGS_REQ = 3,
	TEST_TGS_REQ = 4,
	TEST_TGS_REQ_KRBTGT = 5,
	TEST_TGS_REQ_HOST = 6,
	TEST_TGS_REQ_HOST_SRV_INST = 7,
	TEST_TGS_REQ_HOST_SRV_HST = 8,
	TEST_AS_REQ_SELF = 9,
	TEST_DONE = 10
};

struct torture_krb5_context {
	struct smb_krb5_context *smb_krb5_context;
	struct torture_context *tctx;
	struct addrinfo *server;
	struct test_data *test_data;
	int packet_count;
	enum test_stage test_stage;
	AS_REQ as_req;
	AS_REP as_rep;
	TGS_REQ tgs_req;
	TGS_REP tgs_rep;
};

struct pac_data {
	const char *principal_name;
};

/*
 * A helper function which avoids touching the local databases to
 * generate the session info, as we just want to verify the principal
 * name that we found in the ticket not the full local token
 */
static NTSTATUS test_generate_session_info_pac(struct auth4_context *auth_ctx,
					       TALLOC_CTX *mem_ctx,
					       struct smb_krb5_context *smb_krb5_context,
					       DATA_BLOB *pac_blob,
					       const char *principal_name,
					       const struct tsocket_address *remote_address,
					       uint32_t session_info_flags,
					       struct auth_session_info **session_info)
{
	NTSTATUS nt_status;
	struct auth_user_info_dc *user_info_dc;
	TALLOC_CTX *tmp_ctx;
	struct pac_data *pac_data;

	tmp_ctx = talloc_named(mem_ctx, 0, "gensec_gssapi_session_info context");
	NT_STATUS_HAVE_NO_MEMORY(tmp_ctx);

	auth_ctx->private_data = pac_data = talloc_zero(auth_ctx, struct pac_data);

	pac_data->principal_name = talloc_strdup(pac_data, principal_name);
	if (!pac_data->principal_name) {
		talloc_free(tmp_ctx);
		return NT_STATUS_NO_MEMORY;
	}

	nt_status = kerberos_pac_blob_to_user_info_dc(tmp_ctx,
						      *pac_blob,
						      smb_krb5_context->krb5_context,
						      &user_info_dc, NULL, NULL);
	if (!NT_STATUS_IS_OK(nt_status)) {
		talloc_free(tmp_ctx);
		return nt_status;
	}

	if (user_info_dc->info->authenticated) {
		session_info_flags |= AUTH_SESSION_INFO_AUTHENTICATED;
	}

	session_info_flags |= AUTH_SESSION_INFO_SIMPLE_PRIVILEGES;
	nt_status = auth_generate_session_info(mem_ctx,
					       NULL,
					       NULL,
					       user_info_dc, session_info_flags,
					       session_info);
	if (!NT_STATUS_IS_OK(nt_status)) {
		talloc_free(tmp_ctx);
		return nt_status;
	}

	talloc_free(tmp_ctx);
	return NT_STATUS_OK;
}

/* 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_accept_ticket(struct torture_context *tctx,
			       struct cli_credentials *credentials,
			       const char *principal,
			       DATA_BLOB client_to_server)
{
	NTSTATUS status;
	struct gensec_security *gensec_server_context;
	DATA_BLOB server_to_client;
	struct auth4_context *auth_context;
	struct auth_session_info *session_info;
	struct pac_data *pac_data;
	TALLOC_CTX *tmp_ctx = talloc_new(tctx);

	torture_assert(tctx, tmp_ctx != NULL, "talloc_new() failed");

	auth_context = talloc_zero(tmp_ctx, struct auth4_context);
	torture_assert(tctx, auth_context != NULL, "talloc_new() failed");

	auth_context->generate_session_info_pac = test_generate_session_info_pac;

	status = gensec_server_start(tctx,
				     lpcfg_gensec_settings(tctx, tctx->lp_ctx),
				     auth_context, &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_name(gensec_server_context, "krb5");
	torture_assert_ntstatus_ok(tctx, status, "gensec_start_mech_by_name (server) failed");

	server_to_client = data_blob(NULL, 0);

	/* Do a client-server update dance */
	status = gensec_update(gensec_server_context, tmp_ctx, client_to_server, &server_to_client);
	torture_assert_ntstatus_ok(tctx, status, "gensec_update (server) failed");

	/* Extract the PAC using Samba's code */

	status = gensec_session_info(gensec_server_context, gensec_server_context, &session_info);
	torture_assert_ntstatus_ok(tctx, status, "gensec_session_info failed");

	pac_data = talloc_get_type(auth_context->private_data, struct pac_data);

	torture_assert(tctx, pac_data != NULL, "gensec_update failed to fill in pac_data in auth_context");
	torture_assert(tctx, pac_data->principal_name != NULL, "principal_name not present");
	torture_assert_str_equal(tctx, pac_data->principal_name, principal, "wrong principal name");
	return true;
}

/*
 * TEST_AS_REQ and TEST_AS_REQ_SELF - SEND
 *
 * Confirm that the outgoing packet meets certain expectations.  This
 * should be extended to further assert the correct and expected
 * behaviour of the krb5 libs, so we know what we are sending to the
 * server.
 *
 * Additionally, this CHANGES the request to remove the canonicalize
 * flag automatically added by the krb5 libs when an enterprise
 * principal is used, so we can test what the server does in this
 * combination.
 *
 */

static bool torture_krb5_pre_send_as_req_test(struct torture_krb5_context *test_context,
					      const krb5_data *send_buf,
					      krb5_data *modified_send_buf)
{
	AS_REQ mod_as_req;
	krb5_error_code k5ret;
	size_t used;
	torture_assert_int_equal(test_context->tctx, decode_AS_REQ(send_buf->data, send_buf->length,
					       &test_context->as_req, &used),
				 0, "decode_AS_REQ for TEST_AS_REQ failed");
	mod_as_req = test_context->as_req;
	torture_assert_int_equal(test_context->tctx, used, send_buf->length, "length mismatch");
	torture_assert_int_equal(test_context->tctx, test_context->as_req.pvno,
				 5, "Got wrong as_req->pvno");
	if (test_context->test_data->canonicalize || test_context->test_data->enterprise) {
		torture_assert(test_context->tctx,
			       test_context->as_req.req_body.kdc_options.canonicalize,
			       "krb5 libs did not set canonicalize!");
	} else {
		torture_assert_int_equal(test_context->tctx,
					 test_context->as_req.req_body.kdc_options.canonicalize,
					 false,
					 "krb5 libs unexpectedly set canonicalize!");
	}

	if (test_context->test_data->enterprise) {
		torture_assert_int_equal(test_context->tctx,
					 test_context->as_req.req_body.cname->name_type,
					 KRB5_NT_ENTERPRISE_PRINCIPAL,
					 "krb5 libs did not pass principal as enterprise!");
	} else {
		torture_assert_int_equal(test_context->tctx,
					 test_context->as_req.req_body.cname->name_type,
					 KRB5_NT_PRINCIPAL,
					 "krb5 libs unexpectedly set principal as enterprise!");
	}

	/* Force off canonicalize that was forced on by the krb5 libs */
	if (test_context->test_data->canonicalize == false && test_context->test_data->enterprise) {
		mod_as_req.req_body.kdc_options.canonicalize = false;
	}

	if (test_context->test_stage == TEST_AS_REQ_SELF) {
		/*
		 * Force the server name to match the client name,
		 * including the name type.  This isn't possible with
		 * the krb5 client libs alone
		 */
		mod_as_req.req_body.sname = test_context->as_req.req_body.cname;
	}

	ASN1_MALLOC_ENCODE(AS_REQ, modified_send_buf->data, modified_send_buf->length,
			   &mod_as_req, &used, k5ret);
	torture_assert_int_equal(test_context->tctx,
				 k5ret, 0,
				 "encode_AS_REQ failed");

	if (test_context->test_stage != TEST_AS_REQ_SELF) {
		torture_assert_int_equal(test_context->tctx, used, send_buf->length,
					 "re-encode length mismatch");
	}
	return true;
}

/*
 * TEST_AS_REQ - RECV
 *
 * Confirm that the reply packet from the KDC meets certain
 * expectations as part of TEST_AS_REQ.  This uses a packet count to
 * work out what packet we are up to in the multiple exchanged
 * triggerd by krb5_get_init_creds_password().
 *
 */

static bool torture_krb5_post_recv_as_req_test(struct torture_krb5_context *test_context,
					       const krb5_data *recv_buf)
{
	KRB_ERROR error;
	size_t used;
	if (test_context->packet_count == 0) {
		krb5_error_code k5ret;
		/*
		 * The client libs obtain the salt by attempting to
		 * authenticate without pre-authentication and getting
		 * the correct salt with the
		 * KRB5KDC_ERR_PREAUTH_REQUIRED error.  If we are in
		 * the test (netbios_realm && upn) that deliberatly
		 * has an incorrect principal, we check we get the
		 * correct error.
		 */
		k5ret = decode_KRB_ERROR(recv_buf->data, recv_buf->length,
					 &error, &used);
		if (k5ret != 0) {
			AS_REP as_rep;
			k5ret = decode_AS_REP(recv_buf->data, recv_buf->length,
				      &as_rep, &used);
			if (k5ret == 0) {
				if (test_context->test_data->netbios_realm && test_context->test_data->upn) {
					torture_assert(test_context->tctx, false,
						       "expected to get a KRB_ERROR packet with "
						       "KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN, got valid AS-REP");
				} else {
					torture_assert(test_context->tctx, false,
						       "expected to get a KRB_ERROR packet with "
						       "KRB5KDC_ERR_PREAUTH_REQUIRED, got valid AS-REP");
				}
			} else {
				if (test_context->test_data->netbios_realm && test_context->test_data->upn) {
					torture_assert(test_context->tctx, false,
						       "unable to decode as KRB-ERROR or AS-REP, "
						       "expected to get a KRB_ERROR packet with KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN");
				} else {
					torture_assert(test_context->tctx, false,
						       "unable to decode as KRB-ERROR or AS-REP, "
						       "expected to get a KRB_ERROR packet with KRB5KDC_ERR_PREAUTH_REQUIRED");
				}
			}
		}
		torture_assert_int_equal(test_context->tctx, used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx, error.pvno, 5,
					 "Got wrong error.pvno");
		if (test_context->test_data->netbios_realm && test_context->test_data->upn) {
			torture_assert_int_equal(test_context->tctx,
						 error.error_code,
						 KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN - KRB5KDC_ERR_NONE,
						 "Got wrong error.error_code");
		} else {
			torture_assert_int_equal(test_context->tctx,
						 error.error_code,
						 KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE,
						 "Got wrong error.error_code");
		}

		free_KRB_ERROR(&error);
	} else if ((decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0)
		   && (test_context->packet_count == 1)) {
		/*
		 * The Windows 2012R2 KDC will always respond with
		 * KRB5KRB_ERR_RESPONSE_TOO_BIG over UDP as the ticket
		 * won't fit, because of the PAC.  (It appears to do
		 * this always, even if it will).  This triggers the
		 * client to try again over TCP.
		 */
		torture_assert_int_equal(test_context->tctx,
					 used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 error.pvno, 5,
					 "Got wrong error.pvno");
		torture_assert_int_equal(test_context->tctx,
					 error.error_code,
					 KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE,
					 "Got wrong error.error_code");
		free_KRB_ERROR(&error);
	} else {
		/*
		 * Finally the successful packet.
		 */
		torture_assert_int_equal(test_context->tctx,
					 decode_AS_REP(recv_buf->data, recv_buf->length,
						       &test_context->as_rep, &used), 0,
					 "decode_AS_REP failed");
		torture_assert_int_equal(test_context->tctx, used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 test_context->as_rep.pvno, 5,
					 "Got wrong as_rep->pvno");
		torture_assert_int_equal(test_context->tctx,
					 test_context->as_rep.ticket.tkt_vno, 5,
					 "Got wrong as_rep->ticket.tkt_vno");
		torture_assert(test_context->tctx,
			       test_context->as_rep.ticket.enc_part.kvno,
			       "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");

		/*
		 * We can confirm that the correct proxy behaviour is
		 * in use on the KDC by checking the KVNO of the
		 * krbtgt account returned in the reply.
		 *
		 * A packet passed to the full RW DC will not have a
		 * KVNO in the upper bits, while a packet processed
		 * locally on the RODC will have these bits filled in
		 * the msDS-SecondaryKrbTgtNumber
		 */
		if (torture_setting_bool(test_context->tctx, "expect_cached_at_rodc", false)) {
			torture_assert_int_not_equal(test_context->tctx,
						     *test_context->as_rep.ticket.enc_part.kvno & 0xFFFF0000,
						     0, "Did not get a RODC number in the KVNO");
		} else {
			torture_assert_int_equal(test_context->tctx,
						 *test_context->as_rep.ticket.enc_part.kvno & 0xFFFF0000,
						 0, "Unexpecedly got a RODC number in the KVNO");
		}
		free_AS_REP(&test_context->as_rep);
	}
	torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets");
	free_AS_REQ(&test_context->as_req);
	return true;
}

/*
 * TEST_TGS_REQ_KRBTGT_CANON
 *
 *
 * Confirm that the outgoing TGS-REQ packet from krb5_get_creds()
 * for the krbtgt/realm principal meets certain expectations, like
 * that the canonicalize bit is not set
 *
 */

static bool torture_krb5_pre_send_tgs_req_krbtgt_canon_test(struct torture_krb5_context *test_context, const krb5_data *send_buf, krb5_data *modified_send_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REQ(send_buf->data, send_buf->length,
						&test_context->tgs_req, &used),
				 0, "decode_TGS_REQ for TEST_TGS_REQ test failed");
	torture_assert_int_equal(test_context->tctx,
				 used, send_buf->length,
				 "length mismatch");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.pvno, 5,
				 "Got wrong as_req->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.kdc_options.canonicalize,
				 true,
				 "krb5 libs unexpectedly did not set canonicalize!");

	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.sname->name_type,
				 KRB5_NT_PRINCIPAL,
				 "Mismatch in name_type between request and expected request");

	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_req.req_body.realm,
				 test_context->test_data->real_realm,
				 "Mismatch in realm between request and expected request");

	*modified_send_buf = *send_buf;
	return true;
}

/*
 * TEST_TGS_REQ_KRBTGT_CANON
 *
 * Confirm that the reply TGS-REP packet for krb5_get_creds()
 * where the client is behaving as if this is a cross-realm trust due
 * to case or netbios vs dns name differences meets certain
 * expectations, while canonicalize is set
 *
 */

static bool torture_krb5_post_recv_tgs_req_krbtgt_canon_test(struct torture_krb5_context *test_context, const krb5_data *recv_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REP(recv_buf->data, recv_buf->length,
						&test_context->tgs_rep, &used),
				 0,
				 "decode_TGS_REP failed");
	torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.pvno, 5,
				 "Got wrong as_rep->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.tkt_vno, 5,
				 "Got wrong as_rep->ticket.tkt_vno");
	torture_assert(test_context->tctx,
		       test_context->tgs_rep.ticket.enc_part.kvno,
		       "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_req.req_body.realm,
				 test_context->tgs_rep.ticket.realm,
				 "Mismatch in realm between request and ticket response");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.realm,
				 test_context->test_data->real_realm,
				 "Mismatch in realm between ticket response and expected ticket response");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_type,
				 KRB5_NT_SRV_INST,
				 "Mismatch in name_type between ticket response and expected value of KRB5_NT_SRV_INST");

	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.len,
				 2,
				 "Mismatch in name_type between ticket response and expected value, expected krbtgt/REALM@REALM");

	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.val[0], "krbtgt",
				 "Mismatch in name between reponse and expected response, expected krbtgt");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.val[1], test_context->test_data->real_realm,
				 "Mismatch in realm part of krbtgt/ in expected response, expected krbtgt/REALM@REALM");

	/*
	 * We can confirm that the correct proxy behaviour is
	 * in use on the KDC by checking the KVNO of the
	 * krbtgt account returned in the reply.
	 *
	 * A packet passed to the full RW DC will not have a
	 * KVNO in the upper bits, while a packet processed
	 * locally on the RODC will have these bits filled in
	 * the msDS-SecondaryKrbTgtNumber
	 */
	if (torture_setting_bool(test_context->tctx, "expect_cached_at_rodc", false)) {
		torture_assert_int_not_equal(test_context->tctx,
					     *test_context->tgs_rep.ticket.enc_part.kvno & 0xFFFF0000,
					     0, "Did not get a RODC number in the KVNO");
	} else {
		torture_assert_int_equal(test_context->tctx,
					 *test_context->tgs_rep.ticket.enc_part.kvno & 0xFFFF0000,
					 0, "Unexpecedly got a RODC number in the KVNO");
	}
	free_TGS_REP(&test_context->tgs_rep);
	torture_assert(test_context->tctx,
		       test_context->packet_count < 2,
		       "too many packets");
	free_TGS_REQ(&test_context->tgs_req);
	return true;
}

/*
 * TEST_TGS_REQ_CANON
 *
 * Confirm that the outgoing TGS-REQ packet from krb5_get_creds
 * certain expectations, like that the canonicalize bit is set (this
 * test is to force that handling) and that if an enterprise name was
 * requested, that it was sent.
 *
 */

static bool torture_krb5_pre_send_tgs_req_canon_test(struct torture_krb5_context *test_context,
						     const krb5_data *send_buf,
						     krb5_data *modified_send_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REQ(send_buf->data, send_buf->length,
						&test_context->tgs_req, &used),
				 0, "decode_TGS_REQ for TEST_TGS_REQ_CANON test failed");
	torture_assert_int_equal(test_context->tctx, used, send_buf->length, "length mismatch");
	torture_assert_int_equal(test_context->tctx, test_context->tgs_req.pvno, 5, "Got wrong as_req->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.kdc_options.canonicalize,
				 true, "krb5 libs unexpectedly did not set canonicalize!");

	if (test_context->test_data->enterprise) {
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type, KRB5_NT_ENTERPRISE_PRINCIPAL,
				 "Mismatch in name type between request and expected request, expected  KRB5_NT_ENTERPRISE_PRINCIPAL");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.realm, test_context->test_data->real_realm,
				 "Mismatch in realm between request and expected request");

	} else if (test_context->test_data->canonicalize) {
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type, KRB5_NT_PRINCIPAL,
					 "Mismatch in name type between request and expected request, expected  KRB5_NT_PRINCIPAL");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.realm, test_context->test_data->real_realm,
				 "Mismatch in realm between request and expected request");

	} else {
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type, KRB5_NT_PRINCIPAL,
					 "Mismatch in name type between request and expected request, expected  KRB5_NT_PRINCIPAL");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.realm, test_context->test_data->realm,
				 "Mismatch in realm between request and expected request");

	}

	*modified_send_buf = *send_buf;

	return true;
}

/*
 * TEST_TGS_REQ_CANON - RECV
 *
 * Confirm that the reply TGS-REP or error packet from the KDC meets
 * certain expectations as part of TEST_TGS_REQ_CANON.
 *
 * This is triggered by krb5_get_creds()
 *
 */

static bool torture_krb5_post_recv_tgs_req_canon_test(struct torture_krb5_context *test_context, const krb5_data *recv_buf)
{
	KRB_ERROR error;
	size_t used;

	/*
	 * If this account did not have a servicePrincipalName, then
	 * we expect a errro packet, not a TGS-REQ
	 */
	if (decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0) {
		torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 error.pvno, 5,
					 "Got wrong error.pvno");
		torture_assert_int_equal(test_context->tctx,
					 error.error_code,
					 KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN - KRB5KDC_ERR_NONE,
					 "Got wrong error.error_code");
	} else {
		torture_assert_int_equal(test_context->tctx,
					 decode_TGS_REP(recv_buf->data, recv_buf->length,
							&test_context->tgs_rep,
							&used),
					 0,
					 "decode_TGS_REP failed");
		torture_assert_int_equal(test_context->tctx,
					 used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_rep.pvno, 5,
					 "Got wrong as_rep->pvno");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_rep.ticket.tkt_vno, 5,
					 "Got wrong as_rep->ticket.tkt_vno");
		torture_assert(test_context->tctx,
			       test_context->tgs_rep.ticket.enc_part.kvno,
			       "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_rep.ticket.realm,
					 test_context->test_data->real_realm,
					 "Mismatch in realm between ticket response and expected upper case REALM");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_rep.ticket.sname.name_type,
					 test_context->tgs_req.req_body.sname->name_type,
					 "Mismatch in name_type between request and ticket response");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_rep.ticket.sname.name_string.len,
					 test_context->tgs_req.req_body.sname->name_string.len,
					 "Mismatch in name_string.len between request and ticket response");
		torture_assert(test_context->tctx,
			       test_context->tgs_rep.ticket.sname.name_string.len >= 1,
			       "name_string.len should be >=1 in ticket response");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_rep.ticket.sname.name_string.val[0],
					 test_context->tgs_req.req_body.sname->name_string.val[0],
					 "Mismatch in name between request and expected request");
		torture_assert_int_equal(test_context->tctx,
					 *test_context->tgs_rep.ticket.enc_part.kvno & 0xFFFF0000,
					 0, "Unexpecedly got a RODC number in the KVNO, should just be principal KVNO");
		free_TGS_REP(&test_context->tgs_rep);
	}
	torture_assert(test_context->tctx, test_context->packet_count == 0, "too many packets");
	free_TGS_REQ(&test_context->tgs_req);

	return true;
}

/*
 * TEST_SELF_TRUST_TGS_REQ
 *
 * Confirm that the outgoing TGS-REQ packet from krb5_mk_req_exact()
 * certain expectations, like that the canonicalize bit is set (this
 * test is to force that handling).
 *
 * This test is for the case where the name we ask for, while a valid
 * alternate name for our own realm is used.  The client acts as if
 * this is cross-realm trust.
 *
 */

static bool torture_krb5_pre_send_self_trust_tgs_req_test(struct torture_krb5_context *test_context,
							  const krb5_data *send_buf,
							  krb5_data *modified_send_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REQ(send_buf->data, send_buf->length,
						&test_context->tgs_req, &used),
				 0, "decode_TGS_REQ for TEST_SELF_TRUST_TGS_REQ test failed");
	torture_assert_int_equal(test_context->tctx, used, send_buf->length, "length mismatch");
	torture_assert_int_equal(test_context->tctx, test_context->tgs_req.pvno, 5, "Got wrong as_req->pvno");
	torture_assert_int_equal(test_context->tctx, test_context->tgs_req.req_body.kdc_options.canonicalize, false, "krb5 libs unexpectedly set canonicalize!");

	if (test_context->test_data->canonicalize) {
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.realm,
					 test_context->test_data->real_realm,
					 "Mismatch in realm between request and expected request");
	} else {
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.realm,
					 test_context->test_data->realm,
					 "Mismatch in realm between request and expected request");
	}
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.sname->name_type, KRB5_NT_PRINCIPAL,
				 "Mismatch in name type between request and expected request, expected  KRB5_NT_PRINCIPAL");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.sname->name_string.len, 2,
				 "Mismatch in name between request and expected request, expected krbtgt/realm");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_req.req_body.sname->name_string.val[0], "krbtgt",
				 "Mismatch in name between request and expected request, expected krbtgt");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_req.req_body.sname->name_string.val[1], test_context->test_data->realm,
				 "Mismatch in realm part of cross-realm request principal between request and expected request");
	*modified_send_buf = *send_buf;

	return true;
}

/*
 * TEST_SELF_TRUST_TGS_REQ and TEST_TGS_REQ_KRBTGT - RECV
 *
 * Confirm that the reply TGS-REP packet for krb5_mk_req_exact(),
 * where the client is behaving as if this is a cross-realm trust due
 * to case or netbios vs dns name differences meets certain
 * expectations.
 *
 */

static bool torture_krb5_post_recv_self_trust_tgs_req_test(struct torture_krb5_context *test_context, const krb5_data *recv_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REP(recv_buf->data, recv_buf->length,
						&test_context->tgs_rep, &used),
				 0,
				 "decode_TGS_REP failed");
	torture_assert_int_equal(test_context->tctx, used, recv_buf->length, "length mismatch");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.pvno, 5,
				 "Got wrong as_rep->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.tkt_vno, 5,
				 "Got wrong as_rep->ticket.tkt_vno");
	torture_assert(test_context->tctx,
		       test_context->tgs_rep.ticket.enc_part.kvno,
		       "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_req.req_body.realm,
				 test_context->tgs_rep.ticket.realm,
				 "Mismatch in realm between request and ticket response");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_type,
				 test_context->tgs_req.req_body.sname->name_type,
				 "Mismatch in name_type between request and ticket response");

	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.len, 2,
				 "Mismatch in name between request and expected request, expected krbtgt/realm");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.val[0], "krbtgt",
				 "Mismatch in name between request and expected request, expected krbtgt");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.val[1], test_context->test_data->realm,
				 "Mismatch in realm part of cross-realm request principal between response and expected request");
	/*
	 * We can confirm that the correct proxy behaviour is
	 * in use on the KDC by checking the KVNO of the
	 * krbtgt account returned in the reply.
	 *
	 * A packet passed to the full RW DC will not have a
	 * KVNO in the upper bits, while a packet processed
	 * locally on the RODC will have these bits filled in
	 * the msDS-SecondaryKrbTgtNumber
	 */
	if (torture_setting_bool(test_context->tctx, "expect_cached_at_rodc", false)) {
		torture_assert_int_not_equal(test_context->tctx,
					     *test_context->tgs_rep.ticket.enc_part.kvno & 0xFFFF0000,
					     0, "Did not get a RODC number in the KVNO");
	} else {
		torture_assert_int_equal(test_context->tctx,
					 *test_context->tgs_rep.ticket.enc_part.kvno & 0xFFFF0000,
					 0, "Unexpecedly got a RODC number in the KVNO");
	}
	free_TGS_REP(&test_context->tgs_rep);
	torture_assert_int_equal(test_context->tctx,
				 test_context->packet_count, 0,
				 "too many packets");
	test_context->packet_count = 0;
	test_context->test_stage = TEST_TGS_REQ;
	free_TGS_REQ(&test_context->tgs_req);
	return true;
}

/*
 * TEST_TGS_REQ
 *
 * Confirm that the outgoing TGS-REQ packet from krb5_mk_req_exact()
 * certain expectations, like that the canonicalize bit is set (this
 * test is to force that handling) and that if an enterprise name was
 * requested, that it was sent.
 *
 */

static bool torture_krb5_pre_send_tgs_req_test(struct torture_krb5_context *test_context, const krb5_data *send_buf, krb5_data *modified_send_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REQ(send_buf->data, send_buf->length,
						&test_context->tgs_req, &used),
				 0, "decode_TGS_REQ for TEST_TGS_REQ test failed");
	torture_assert_int_equal(test_context->tctx, used, send_buf->length, "length mismatch");
	torture_assert_int_equal(test_context->tctx, test_context->tgs_req.pvno, 5,
				 "Got wrong as_req->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.kdc_options.canonicalize,
				 false,
				 "krb5 libs unexpectedly set canonicalize!");

	if (test_context->test_data->enterprise) {
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type,
					 KRB5_NT_ENTERPRISE_PRINCIPAL,
					 "Mismatch in name type between request and expected request, expected  KRB5_NT_ENTERPRISE_PRINCIPAL");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.realm,
					 test_context->test_data->real_realm,
					 "Mismatch in realm between request and expected request");

	} else {
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type,
					 KRB5_NT_PRINCIPAL,
					 "Mismatch in name type between request and expected request, expected  KRB5_NT_PRINCIPAL");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.realm,
					 test_context->test_data->realm,
					 "Mismatch in realm between request and expected request");

	}

	*modified_send_buf = *send_buf;

	return true;
}

/*
 * TEST_TGS_REQ - RECV
 *
 * Confirm that the reply TGS-REP packet for krb5_mk_req_exact(), for
 * the actual target service.
 *
 */

static bool torture_krb5_post_recv_tgs_req_test(struct torture_krb5_context *test_context, const krb5_data *recv_buf)
{
	KRB_ERROR error;
	size_t used;
	/*
	 * If this account did not have a servicePrincipalName, then
	 * we expect a errro packet, not a TGS-REQ
	 */
	if (decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0) {
		torture_assert_int_equal(test_context->tctx,
					 used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 error.pvno, 5,
					 "Got wrong error.pvno");
		torture_assert_int_equal(test_context->tctx,
					 error.error_code,
					 KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN - KRB5KDC_ERR_NONE,
					 "Got wrong error.error_code");
	} else {
		torture_assert_int_equal(test_context->tctx,
					 decode_TGS_REP(recv_buf->data, recv_buf->length,
							&test_context->tgs_rep, &used),
					 0,
					 "decode_TGS_REP failed");
		torture_assert_int_equal(test_context->tctx, used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_rep.pvno, 5,
					 "Got wrong as_rep->pvno");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_rep.ticket.tkt_vno, 5,
					 "Got wrong as_rep->ticket.tkt_vno");
		torture_assert(test_context->tctx,
			       test_context->tgs_rep.ticket.enc_part.kvno,
			       "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_rep.ticket.realm,
					 test_context->test_data->real_realm,
					 "Mismatch in realm between ticket response and expected upper case REALM");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type,
					 test_context->tgs_rep.ticket.sname.name_type, "Mismatch in name_type between request and ticket response");
		torture_assert_int_equal(test_context->tctx,
					 *test_context->tgs_rep.ticket.enc_part.kvno & 0xFFFF0000,
					 0, "Unexpecedly got a RODC number in the KVNO, should just be principal KVNO");
		free_TGS_REP(&test_context->tgs_rep);
	}
	torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets");
	free_TGS_REQ(&test_context->tgs_req);
	test_context->test_stage = TEST_DONE;
	return true;
}

/*
 * TEST_TGS_REQ_KRBTGT
 *
 *
 * Confirm that the outgoing TGS-REQ packet from krb5_mk_req_exact()
 * for the krbtgt/realm principal meets certain expectations, like
 * that the canonicalize bit is not set
 *
 */

static bool torture_krb5_pre_send_tgs_req_krbtgt_test(struct torture_krb5_context *test_context, const krb5_data *send_buf, krb5_data *modified_send_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REQ(send_buf->data, send_buf->length,
						&test_context->tgs_req, &used),
				 0, "decode_TGS_REQ for TEST_TGS_REQ test failed");
	torture_assert_int_equal(test_context->tctx,
				 used, send_buf->length,
				 "length mismatch");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.pvno, 5,
				 "Got wrong as_req->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.kdc_options.canonicalize,
				 false,
				 "krb5 libs unexpectedly set canonicalize!");

	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_req.req_body.realm,
				 test_context->test_data->realm,
				 "Mismatch in realm between request and expected request");

	*modified_send_buf = *send_buf;
	test_context->test_stage = TEST_DONE;
	return true;
}

/*
 * TEST_TGS_REQ_HOST, TEST_TGS_REQ_HOST_SRV_INST and TEST_TGS_REQ_HOST_SRV_HST
 *
 *
 * Confirm that the outgoing TGS-REQ packet from krb5_mk_req_exact()
 * for the krbtgt/realm principal meets certain expectations, like
 * that the canonicalize bit is not set
 *
 */

static bool torture_krb5_pre_send_tgs_req_host_test(struct torture_krb5_context *test_context, const krb5_data *send_buf, krb5_data *modified_send_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REQ(send_buf->data, send_buf->length,
						&test_context->tgs_req, &used),
				 0, "decode_TGS_REQ for TEST_TGS_REQ test failed");
	torture_assert_int_equal(test_context->tctx,
				 used, send_buf->length,
				 "length mismatch");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.pvno, 5,
				 "Got wrong as_req->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.sname->name_string.len, 2,
				 "Mismatch in name between request and expected request, expected krbtgt/realm");
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.kdc_options.canonicalize,
					 true,
					 "krb5 libs unexpectedly did not set canonicalize!");

	if (test_context->test_stage == TEST_TGS_REQ_HOST_SRV_INST) {
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type, KRB5_NT_SRV_INST,
					 "Mismatch in name type between request and expected request, expected KRB5_NT_SRV_INST");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_string.val[0],
					 strupper_talloc(test_context, test_context->test_data->krb5_service),
					 "Mismatch in name between request and expected request, expected service");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_string.val[1],
					 test_context->test_data->krb5_hostname,
					 "Mismatch in hostname part between request and expected request");

	} else if (test_context->test_stage == TEST_TGS_REQ_HOST_SRV_HST) {

		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type, KRB5_NT_SRV_HST,
					 "Mismatch in name type between request and expected request, expected KRB5_NT_SRV_HST");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_string.val[0],
					 test_context->test_data->krb5_service,
					 "Mismatch in name between request and expected request, expected service");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_string.val[1],
					 strupper_talloc(test_context, test_context->test_data->krb5_hostname),
					 "Mismatch in hostname part between request and expected request");

	} else {
		torture_assert_int_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_type, KRB5_NT_PRINCIPAL,
					 "Mismatch in name type between request and expected request, expected  KRB5_NT_PRINCIPAL");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_string.val[0],
					 test_context->test_data->krb5_service,
					 "Mismatch in name between request and expected request, expected service");
		torture_assert_str_equal(test_context->tctx,
					 test_context->tgs_req.req_body.sname->name_string.val[1],
					 test_context->test_data->krb5_hostname,
					 "Mismatch in hostname part between request and expected request");

	}
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_req.req_body.realm,
				 test_context->test_data->real_realm,
				 "Mismatch in realm between request and expected request");

	*modified_send_buf = *send_buf;
	return true;
}

/*
 * TEST_TGS_REQ_HOST, TEST_TGS_REQ_HOST_SRV_INST, TEST_TGS_REQ_HOST_SRV_HST - RECV
 *
 * Confirm that the reply TGS-REP packet for krb5_mk_req(), for
 * the actual target service, as a SPN, not a any other name type.
 *
 */

static bool torture_krb5_post_recv_tgs_req_host_test(struct torture_krb5_context *test_context, const krb5_data *recv_buf)
{
	size_t used;
	torture_assert_int_equal(test_context->tctx,
				 decode_TGS_REP(recv_buf->data, recv_buf->length,
						&test_context->tgs_rep, &used),
				 0,
				 "decode_TGS_REP failed");
	torture_assert_int_equal(test_context->tctx, used, recv_buf->length,
				 "length mismatch");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.pvno, 5,
				 "Got wrong as_rep->pvno");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.tkt_vno, 5,
				 "Got wrong as_rep->ticket.tkt_vno");
	torture_assert(test_context->tctx,
		       test_context->tgs_rep.ticket.enc_part.kvno,
		       "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.realm,
				 test_context->test_data->real_realm,
				 "Mismatch in realm between ticket response and expected upper case REALM");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_req.req_body.sname->name_type,
				 test_context->tgs_rep.ticket.sname.name_type, "Mismatch in name_type between request and ticket response");
	torture_assert_int_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.len, 2,
				 "Mismatch in name between request and expected request, expected service/hostname");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.val[0],
				 test_context->tgs_req.req_body.sname->name_string.val[0],
				 "Mismatch in name between request and expected request, expected service/hostname");
	torture_assert_str_equal(test_context->tctx,
				 test_context->tgs_rep.ticket.sname.name_string.val[1],
				 test_context->tgs_req.req_body.sname->name_string.val[1],
				 "Mismatch in name between request and expected request, expected service/hostname");

	torture_assert_int_equal(test_context->tctx,
				 *test_context->tgs_rep.ticket.enc_part.kvno & 0xFFFF0000,
				 0, "Unexpecedly got a RODC number in the KVNO, should just be principal KVNO");
	free_TGS_REP(&test_context->tgs_rep);

	torture_assert(test_context->tctx, test_context->packet_count < 2, "too many packets");
	return true;
}

/*
 * TEST_AS_REQ_SELF - RECV
 *
 * Confirm that the reply packet from the KDC meets certain
 * expectations as part of TEST_AS_REQ.  This uses a packet count to
 * work out what packet we are up to in the multiple exchanged
 * triggerd by krb5_get_init_creds_password().
 *
 */

static bool torture_krb5_post_recv_as_req_self_test(struct torture_krb5_context *test_context,
						    const krb5_data *recv_buf)
{
	KRB_ERROR error;
	size_t used;
	if (test_context->packet_count == 0) {
		krb5_error_code k5ret;
		/*
		 * The client libs obtain the salt by attempting to
		 * authenticate without pre-authentication and getting
		 * the correct salt with the
		 * KRB5KDC_ERR_PREAUTH_REQUIRED error.  If we are in
		 * the test (netbios_realm && upn) that deliberatly
		 * has an incorrect principal, we check we get the
		 * correct error.
		 */
		k5ret = decode_KRB_ERROR(recv_buf->data, recv_buf->length,
					 &error, &used);
		if (k5ret != 0) {
			AS_REP as_rep;
			k5ret = decode_AS_REP(recv_buf->data, recv_buf->length,
				      &as_rep, &used);
			if (k5ret == 0) {
				if (torture_setting_bool(test_context->tctx, "expect_machine_account", false) == false
				    || (test_context->test_data->upn == true)) {
					torture_assert(test_context->tctx, false,
						       "expected to get a KRB_ERROR packet with "
						       "KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN or KRB5KDC_ERR_PREAUTH_REQUIRED, got valid AS-REP");
				} else {
					torture_assert(test_context->tctx, false,
						       "expected to get a KRB_ERROR packet with "
						       "KRB5KDC_ERR_PREAUTH_REQUIRED, got valid AS-REP");
				}
			} else {
				if (torture_setting_bool(test_context->tctx, "expect_machine_account", false) == false
				    || (test_context->test_data->upn == true)) {
					torture_assert(test_context->tctx, false,
						       "unable to decode as KRB-ERROR or AS-REP, "
						       "expected to get a KRB_ERROR packet with KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN or KRB5KDC_ERR_PREAUTH_REQUIRED");
				} else {
					torture_assert(test_context->tctx, false,
						       "unable to decode as KRB-ERROR or AS-REP, "
						       "expected to get a KRB_ERROR packet with KRB5KDC_ERR_PREAUTH_REQUIRED");
				}
			}
		}
		torture_assert_int_equal(test_context->tctx, used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx, error.pvno, 5,
					 "Got wrong error.pvno");
		if ((torture_setting_bool(test_context->tctx, "expect_machine_account", false) == false
		     || (test_context->test_data->upn == true))
		    && error.error_code == KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN - KRB5KDC_ERR_NONE) {
			/*
			 * IGNORE
			 *
			 * This case is because Samba's Heimdal KDC
			 * checks server and client accounts before
			 * checking for pre-authentication.
			 */
		} else {
			torture_assert_int_equal(test_context->tctx,
						 error.error_code,
						 KRB5KDC_ERR_PREAUTH_REQUIRED - KRB5KDC_ERR_NONE,
						 "Got wrong error.error_code");
		}

		free_KRB_ERROR(&error);
	} else if ((decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0)
		   && (test_context->packet_count == 1)) {
		/*
		 * The Windows 2012R2 KDC will always respond with
		 * KRB5KRB_ERR_RESPONSE_TOO_BIG over UDP as the ticket
		 * won't fit, because of the PAC.  (It appears to do
		 * this always, even if it will).  This triggers the
		 * client to try again over TCP.
		 */
		torture_assert_int_equal(test_context->tctx,
					 used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 error.pvno, 5,
					 "Got wrong error.pvno");
		if ((torture_setting_bool(test_context->tctx, "expect_machine_account", false)
		     && (test_context->test_data->upn == false))) {
			torture_assert_int_equal(test_context->tctx,
						 error.error_code,
						 KRB5KRB_ERR_RESPONSE_TOO_BIG - KRB5KDC_ERR_NONE,
						 "Got wrong error.error_code");
		} else {
			torture_assert_int_equal(test_context->tctx,
						 error.error_code,
						 KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN - KRB5KDC_ERR_NONE,
						 "Got wrong error.error_code");
		}
		free_KRB_ERROR(&error);
	} else {
		/*
		 * Finally the successful packet.
		 */
		torture_assert_int_equal(test_context->tctx,
					 decode_AS_REP(recv_buf->data, recv_buf->length,
						       &test_context->as_rep, &used), 0,
					 "decode_AS_REP failed");
		torture_assert_int_equal(test_context->tctx, used, recv_buf->length,
					 "length mismatch");
		torture_assert_int_equal(test_context->tctx,
					 test_context->as_rep.pvno, 5,
					 "Got wrong as_rep->pvno");
		torture_assert_int_equal(test_context->tctx,
					 test_context->as_rep.ticket.tkt_vno, 5,
					 "Got wrong as_rep->ticket.tkt_vno");
		torture_assert(test_context->tctx,
			       test_context->as_rep.ticket.enc_part.kvno,
			       "Did not get a KVNO in test_context->as_rep.ticket.enc_part.kvno");

		/*
		 * We do not expect an RODC number here in the KVNO,
		 * as this is a ticket to the user's own account.
		 */
		torture_assert_int_equal(test_context->tctx,
					 *test_context->as_rep.ticket.enc_part.kvno & 0xFFFF0000,
					 0, "Unexpecedly got a RODC number in the KVNO");
		free_AS_REP(&test_context->as_rep);
	}
	torture_assert(test_context->tctx, test_context->packet_count < 3, "too many packets");
	free_AS_REQ(&test_context->as_req);
	return true;
}

/*
 * This function is set in torture_krb5_init_context_canon as krb5
 * send_and_recv function.  This allows us to override what server the
 * test is aimed at, and to inspect the packets just before they are
 * sent to the network, and before they are processed on the recv
 * side.
 *
 * The torture_krb5_pre_send_test() and torture_krb5_post_recv_test()
 * functions are implement the actual tests.
 *
 * When this asserts, the caller will get a spurious 'cannot contact
 * any KDC' message.
 *
 */
static krb5_error_code smb_krb5_send_and_recv_func_canon_override(krb5_context context,
								   void *data, /* struct torture_krb5_context */
								   krb5_krbhst_info *hi,
								   time_t timeout,
								   const krb5_data *send_buf,
								   krb5_data *recv_buf)
{
	krb5_error_code k5ret;
	bool ok = false;
	krb5_data modified_send_buf;

	struct torture_krb5_context *test_context
		= talloc_get_type_abort(data, struct torture_krb5_context);

	switch (test_context->test_stage) {
	case TEST_DONE:
		torture_warning(test_context->tctx, "Unexpected outgoing packet from krb5 libs");
		return EINVAL;
	case TEST_AS_REQ:
		ok = torture_krb5_pre_send_as_req_test(test_context, send_buf,
							      &modified_send_buf);
		break;
	case TEST_TGS_REQ_KRBTGT_CANON:
		ok = torture_krb5_pre_send_tgs_req_krbtgt_canon_test(test_context, send_buf,
								     &modified_send_buf);
		break;
	case TEST_TGS_REQ_CANON:
		ok = torture_krb5_pre_send_tgs_req_canon_test(test_context, send_buf,
							      &modified_send_buf);
		break;
	case TEST_SELF_TRUST_TGS_REQ:
		ok = torture_krb5_pre_send_self_trust_tgs_req_test(test_context, send_buf,
								   &modified_send_buf);
		break;
	case TEST_TGS_REQ:
		ok = torture_krb5_pre_send_tgs_req_test(test_context, send_buf,
							&modified_send_buf);
		break;
	case TEST_TGS_REQ_KRBTGT:
		ok = torture_krb5_pre_send_tgs_req_krbtgt_test(test_context, send_buf,
							       &modified_send_buf);
		break;
	case TEST_TGS_REQ_HOST:
	case TEST_TGS_REQ_HOST_SRV_INST:
	case TEST_TGS_REQ_HOST_SRV_HST:
		ok = torture_krb5_pre_send_tgs_req_host_test(test_context, send_buf,
							     &modified_send_buf);
		break;
	case TEST_AS_REQ_SELF:
		ok = torture_krb5_pre_send_as_req_test(test_context, send_buf,
						       &modified_send_buf);
		break;
	}
	if (ok == false) {
		return EINVAL;
	}

	k5ret = smb_krb5_send_and_recv_func_forced(context, test_context->server,
						   hi, timeout, &modified_send_buf,
						   recv_buf);
	if (k5ret != 0) {
		return k5ret;
	}

	switch (test_context->test_stage) {
	case TEST_DONE:
		torture_warning(test_context->tctx, "Unexpected outgoing packet from krb5 libs");
		return EINVAL;
	case TEST_AS_REQ:
		ok = torture_krb5_post_recv_as_req_test(test_context, recv_buf);
		break;
	case TEST_TGS_REQ_KRBTGT_CANON:
		ok = torture_krb5_post_recv_tgs_req_krbtgt_canon_test(test_context, recv_buf);
		break;
	case TEST_TGS_REQ_CANON:
		ok = torture_krb5_post_recv_tgs_req_canon_test(test_context, recv_buf);
		break;
	case TEST_SELF_TRUST_TGS_REQ:
		ok = torture_krb5_post_recv_self_trust_tgs_req_test(test_context, recv_buf);
		break;
	case TEST_TGS_REQ:
		ok = torture_krb5_post_recv_tgs_req_test(test_context, recv_buf);
		break;
	case TEST_TGS_REQ_KRBTGT:
		ok = torture_krb5_post_recv_self_trust_tgs_req_test(test_context, recv_buf);
		break;
	case TEST_TGS_REQ_HOST:
	case TEST_TGS_REQ_HOST_SRV_INST:
	case TEST_TGS_REQ_HOST_SRV_HST:
		ok = torture_krb5_post_recv_tgs_req_host_test(test_context, recv_buf);
		break;
	case TEST_AS_REQ_SELF:
		ok = torture_krb5_post_recv_as_req_self_test(test_context, recv_buf);
		break;
	}
	if (ok == false) {
		KRB_ERROR error;
		size_t used;
		torture_warning(test_context->tctx, "Packet of length %llu failed post-recv checks in test stage %d", (unsigned long long)recv_buf->length, test_context->test_stage);
		if (decode_KRB_ERROR(recv_buf->data, recv_buf->length, &error, &used) == 0) {
			torture_warning(test_context->tctx,
					"STAGE: %d Unexpectedly got a KRB-ERROR packet "
					"with error code %d (%s)",
					test_context->test_stage,
					error.error_code,
					error_message(error.error_code + KRB5KDC_ERR_NONE));
			free_KRB_ERROR(&error);
		}
		return EINVAL;
	}

	test_context->packet_count++;

	return k5ret;
}

static int test_context_destructor(struct torture_krb5_context *test_context)
{
	freeaddrinfo(test_context->server);
	return 0;
}


static bool torture_krb5_init_context_canon(struct torture_context *tctx,
					     struct test_data *test_data,
					     struct torture_krb5_context **torture_krb5_context)
{
	const char *host = torture_setting_string(tctx, "host", NULL);
	krb5_error_code k5ret;
	bool ok;

	struct torture_krb5_context *test_context = talloc_zero(tctx, struct torture_krb5_context);
	torture_assert(tctx, test_context != NULL, "Failed to allocate");

	test_context->test_data = test_data;
	test_context->tctx = tctx;

	k5ret = smb_krb5_init_context(test_context, tctx->lp_ctx, &test_context->smb_krb5_context);
	torture_assert_int_equal(tctx, k5ret, 0, "smb_krb5_init_context failed");

	ok = interpret_string_addr_internal(&test_context->server, host, AI_NUMERICHOST);
	torture_assert(tctx, ok, "Failed to parse target server");

	talloc_set_destructor(test_context, test_context_destructor);

	set_sockaddr_port(test_context->server->ai_addr, 88);

	k5ret = krb5_set_send_to_kdc_func(test_context->smb_krb5_context->krb5_context,
					  smb_krb5_send_and_recv_func_canon_override,
					  test_context);
	torture_assert_int_equal(tctx, k5ret, 0, "krb5_set_send_to_kdc_func failed");
	*torture_krb5_context = test_context;
	return true;
}


static bool torture_krb5_as_req_canon(struct torture_context *tctx, const void *tcase_data)
{
	krb5_error_code k5ret;
	krb5_get_init_creds_opt *krb_options = NULL;
	struct test_data *test_data = talloc_get_type_abort(tcase_data, struct test_data);
	krb5_principal principal;
	krb5_principal krbtgt_other;
	krb5_principal expected_principal;
	char *principal_string;
	char *krbtgt_other_string;
	int principal_flags;
	char *expected_principal_string;
	char *expected_unparse_principal_string;
	int expected_principal_flags;
	char *got_principal_string;
	char *assertion_message;
	const char *password = cli_credentials_get_password(
			popt_get_cmdline_credentials());
	krb5_context k5_context;
	struct torture_krb5_context *test_context;
	bool ok;
	krb5_creds my_creds;
	krb5_creds *server_creds;
	krb5_ccache ccache;
	krb5_auth_context auth_context;
	char *cc_name;
	krb5_data in_data, enc_ticket;
	krb5_get_creds_opt opt;

	const char *upn = torture_setting_string(tctx, "krb5-upn", "");
	test_data->krb5_service = torture_setting_string(tctx, "krb5-service", "host");
	test_data->krb5_hostname = torture_setting_string(tctx, "krb5-hostname", "");

	/*
	 * If we have not passed a UPN on the command line,
	 * then skip the UPN tests.
	 */
	if (test_data->upn && upn[0] == '\0') {
		torture_skip(tctx, "This test needs a UPN specified as --option=torture:krb5-upn=user@example.com to run");
	}

	if (test_data->removedollar &&
	    !torture_setting_bool(tctx, "run_removedollar_test", false))
	{
		torture_skip(tctx, "--option=torture:run_removedollar_test=true not specified");
	}

	if (test_data->netbios_realm) {
		test_data->realm = test_data->real_domain;
	} else {
		test_data->realm = test_data->real_realm;
	}

	if (test_data->upn) {
		char *p;
		test_data->username = talloc_strdup(test_data, upn);
		p = strchr(test_data->username, '@');
		if (p) {
			*p = '\0';
			p++;
		}
		/*
		 * Test the UPN behaviour carefully.  We can
		 * test in two different modes, depending on
		 * what UPN has been set up for us.
		 *
		 * If the UPN is in our realm, then we do all the tests with this name also.
		 *
		 * If the UPN is not in our realm, then we
		 * expect the tests that replace the realm to
		 * fail (as it won't match)
		 */
		if (strcasecmp(p, test_data->real_realm) != 0) {
			test_data->other_upn_suffix = true;
		} else {
			test_data->other_upn_suffix = false;
		}

		/*
		 * This lets us test the combination of the UPN prefix
		 * with a valid domain, without adding even more
		 * combinations
		 */
		if (test_data->netbios_realm == false) {
			test_data->realm = p;
		}
	}

	ok = torture_krb5_init_context_canon(tctx, test_data, &test_context);
	torture_assert(tctx, ok, "torture_krb5_init_context failed");
	k5_context = test_context->smb_krb5_context->krb5_context;

	if (test_data->upper_realm) {
		test_data->realm = strupper_talloc(test_data, test_data->realm);
	} else {
		test_data->realm = strlower_talloc(test_data, test_data->realm);
	}
	if (test_data->upper_username) {
		test_data->username = strupper_talloc(test_data, test_data->username);
	} else {
		test_data->username = talloc_strdup(test_data, test_data->username);
	}

	if (test_data->removedollar) {
		char *p;

		p = strchr_m(test_data->username, '$');
		torture_assert(tctx, p != NULL, talloc_asprintf(tctx,
			       "username[%s] contains no '$'\n",
			       test_data->username));
		*p = '\0';
	}

	principal_string = talloc_asprintf(test_data, "%s@%s", test_data->username, test_data->realm);

	/*
	 * If we are set to canonicalize, we get back the fixed UPPER
	 * case realm, and the real username (ie matching LDAP
	 * samAccountName)
	 *
	 * Otherwise, if we are set to enterprise, we
	 * get back the whole principal as-sent
	 *
	 * Finally, if we are not set to canonicalize, we get back the
	 * fixed UPPER case realm, but the as-sent username
	 */
	if (test_data->canonicalize) {
		expected_principal_string = talloc_asprintf(test_data,
							    "%s@%s",
							    test_data->real_username,
							    test_data->real_realm);
	} else if (test_data->enterprise) {
		expected_principal_string = principal_string;
	} else {
		expected_principal_string = talloc_asprintf(test_data,
							    "%s@%s",
							    test_data->username,
							    test_data->real_realm);
	}

	if (test_data->enterprise) {
		principal_flags = KRB5_PRINCIPAL_PARSE_ENTERPRISE;
	} else {
		if (test_data->upn && test_data->other_upn_suffix) {
			torture_skip(tctx, "UPN test for UPN with other UPN suffix only runs with enterprise principals");
		}
		principal_flags = 0;
	}

	if (test_data->canonicalize) {
		expected_principal_flags = 0;
	} else {
		expected_principal_flags = principal_flags;
	}

	torture_assert_int_equal(tctx,
				 krb5_parse_name_flags(k5_context,
						       principal_string,
						       principal_flags,
						       &principal),
					 0, "krb5_parse_name_flags failed");
	torture_assert_int_equal(tctx,
				 krb5_parse_name_flags(k5_context,
						       expected_principal_string,
						       expected_principal_flags,
						       &expected_principal),
				 0, "krb5_parse_name_flags failed");

	torture_assert_int_equal(tctx,
				 krb5_unparse_name(k5_context,
						   expected_principal,
						   &expected_unparse_principal_string),
				 0, "krb5_unparse_name failed");
	/*
	 * Prepare a AS-REQ and run the TEST_AS_REQ tests
	 *
	 */

	test_context->test_stage = TEST_AS_REQ;
	test_context->packet_count = 0;

	/*
	 * Set the canonicalize flag if this test requires it
	 */
	torture_assert_int_equal(tctx,
				 krb5_get_init_creds_opt_alloc(k5_context, &krb_options),
				 0, "krb5_get_init_creds_opt_alloc failed");

	torture_assert_int_equal(tctx,
				 krb5_get_init_creds_opt_set_canonicalize(k5_context,
									  krb_options,
									  test_data->canonicalize),
				 0, "krb5_get_init_creds_opt_set_canonicalize failed");

	torture_assert_int_equal(tctx,
				 krb5_get_init_creds_opt_set_win2k(k5_context,
								   krb_options,
								   test_data->win2k),
				 0, "krb5_get_init_creds_opt_set_win2k failed");

	k5ret = krb5_get_init_creds_password(k5_context, &my_creds, principal,
					     password, NULL, NULL, 0,
					     NULL, krb_options);

	if (test_data->netbios_realm && test_data->upn) {
		torture_assert_int_equal(tctx, k5ret,
					 KRB5KDC_ERR_C_PRINCIPAL_UNKNOWN,
					 "Got wrong error_code from krb5_get_init_creds_password");
		/* We can't proceed with more checks */
		return true;
	} else {
		assertion_message = talloc_asprintf(tctx,
						    "krb5_get_init_creds_password for %s failed: %s",
						    principal_string,
						    smb_get_krb5_error_message(k5_context, k5ret, tctx));
		torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
	}

	torture_assert(tctx,
		       test_context->packet_count > 1,
		       "Expected krb5_get_init_creds_password to send more packets");

	/*
	 * Assert that the reply was with the correct type of
	 * principal, depending on the flags we set
	 */
	if (test_data->canonicalize == false && test_data->enterprise) {
		torture_assert_int_equal(tctx,
					 krb5_principal_get_type(k5_context,
								 my_creds.client),
					 KRB5_NT_ENTERPRISE_PRINCIPAL,
					 "smb_krb5_init_context gave incorrect client->name.name_type");
	} else {
		torture_assert_int_equal(tctx,
					 krb5_principal_get_type(k5_context,
								 my_creds.client),
					 KRB5_NT_PRINCIPAL,
					 "smb_krb5_init_context gave incorrect client->name.name_type");
	}

	torture_assert_int_equal(tctx,
				 krb5_unparse_name(k5_context,
						   my_creds.client, &got_principal_string), 0,
				 "krb5_unparse_name failed");

	assertion_message = talloc_asprintf(tctx,
					    "krb5_get_init_creds_password returned a different principal %s to what was expected %s",
					    got_principal_string, expected_principal_string);
	krb5_free_unparsed_name(k5_context, got_principal_string);

	torture_assert(tctx, krb5_principal_compare(k5_context,
						    my_creds.client, expected_principal),
		       assertion_message);


	torture_assert_int_equal(tctx,
				 krb5_principal_get_type(k5_context,
							 my_creds.server), KRB5_NT_SRV_INST,
				 "smb_krb5_init_context gave incorrect server->name.name_type");

	torture_assert_int_equal(tctx,
				 krb5_principal_get_num_comp(k5_context,
							     my_creds.server), 2,
				 "smb_krb5_init_context gave incorrect number of components in my_creds.server->name");

	torture_assert_str_equal(tctx,
				 krb5_principal_get_comp_string(k5_context,
								my_creds.server, 0),
				 "krbtgt",
				 "smb_krb5_init_context gave incorrect my_creds.server->name.name_string[0]");

	if (test_data->canonicalize || test_data->enterprise) {
		torture_assert_str_equal(tctx,
					 krb5_principal_get_comp_string(k5_context,
									my_creds.server, 1),
					 test_data->real_realm,

					 "smb_krb5_init_context gave incorrect my_creds.server->name.name_string[1]");
	} else {
		torture_assert_str_equal(tctx,
					 krb5_principal_get_comp_string(k5_context,
									my_creds.server, 1),
					 test_data->realm,

					 "smb_krb5_init_context gave incorrect my_creds.server->name.name_string[1]");
	}
	torture_assert_str_equal(tctx,
				 krb5_principal_get_realm(k5_context,
							  my_creds.server),
				 test_data->real_realm,
				 "smb_krb5_init_context gave incorrect my_creds.server->realm");

	/* Store the result of the 'kinit' above into a memory ccache */
	cc_name = talloc_asprintf(tctx, "MEMORY:%s", test_data->test_name);
	torture_assert_int_equal(tctx, krb5_cc_resolve(k5_context, cc_name,
						       &ccache),
				 0, "krb5_cc_resolve failed");

	torture_assert_int_equal(tctx, krb5_cc_initialize(k5_context,
							  ccache, my_creds.client),
				 0, "krb5_cc_initialize failed");

	torture_assert_int_equal(tctx, krb5_cc_store_cred(k5_context,
							  ccache, &my_creds),
				 0, "krb5_cc_store_cred failed");

	/*
	 * Prepare a TGS-REQ and run the TEST_TGS_REQ_KRBTGT_CANON tests
	 *
	 * This tests krb5_get_creds behaviour, which allows us to set
	 * the KRB5_GC_CANONICALIZE option against the krbtgt/ principal
	 */

	krbtgt_other_string = talloc_asprintf(test_data, "krbtgt/%s@%s", test_data->real_domain, test_data->real_realm);
	torture_assert_int_equal(tctx,
				 krb5_make_principal(k5_context, &krbtgt_other,
						     test_data->real_realm, "krbtgt",
						     test_data->real_domain, NULL),
				 0, "krb5_make_principal failed");

	test_context->test_stage = TEST_TGS_REQ_KRBTGT_CANON;
	test_context->packet_count = 0;

	torture_assert_int_equal(tctx,
				 krb5_get_creds_opt_alloc(k5_context, &opt),
				 0, "krb5_get_creds_opt_alloc");

	krb5_get_creds_opt_add_options(k5_context,
				       opt,
				       KRB5_GC_CANONICALIZE);

	krb5_get_creds_opt_add_options(k5_context,
				       opt,
				       KRB5_GC_NO_STORE);

	/* Confirm if we can get a ticket krbtgt/realm that we got back with the initial kinit */
	k5ret = krb5_get_creds(k5_context, opt, ccache, krbtgt_other, &server_creds);

	if (test_data->canonicalize == false && test_data->enterprise == false
	    && test_data->netbios_realm && test_data->upper_realm) {
		/*
		 * In these situations, the code above does store a
		 * principal in the credentials cache matching what
		 * krb5_get_creds() needs, so the test succeds, with no packets.
		 *
		 */
		assertion_message = talloc_asprintf(tctx,
						    "krb5_get_creds for %s failed with: %s",
						    krbtgt_other_string,
						    smb_get_krb5_error_message(k5_context, k5ret,
									       tctx));

		torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
		torture_assert_int_equal(tctx,
					 test_context->packet_count,
					 0, "Expected krb5_get_creds not to send packets");
	} else if (test_data->canonicalize == false && test_data->enterprise == false
		   && (test_data->upper_realm == false || test_data->netbios_realm == true)) {
		torture_assert_int_equal(tctx, k5ret, KRB5_CC_NOTFOUND,
					 "krb5_get_creds should have failed with KRB5_CC_NOTFOUND");
	} else {

		/*
		 * In these situations, the code above does not store a
		 * principal in the credentials cache matching what
		 * krb5_get_creds() needs without talking to the KDC, so the
		 * test fails with looping detected because when we set
		 * canonicalize we confuse the client libs.
		 *
		 */
		assertion_message = talloc_asprintf(tctx,
						    "krb5_get_creds for %s should have failed with looping detected: %s",
						    krbtgt_other_string,
						    smb_get_krb5_error_message(k5_context, k5ret,
									       tctx));

		torture_assert_int_equal(tctx, k5ret, KRB5_GET_IN_TKT_LOOP, assertion_message);
		torture_assert_int_equal(tctx,
					 test_context->packet_count,
					 2, "Expected krb5_get_creds to send packets");
	}

	/*
	 * Prepare a TGS-REQ and run the TEST_TGS_REQ_CANON tests
	 *
	 * This tests krb5_get_creds behaviour, which allows us to set
	 * the KRB5_GC_CANONICALIZE option
	 */

	test_context->test_stage = TEST_TGS_REQ_CANON;
	test_context->packet_count = 0;

	torture_assert_int_equal(tctx,
				 krb5_get_creds_opt_alloc(k5_context, &opt),
				 0, "krb5_get_creds_opt_alloc");

	krb5_get_creds_opt_add_options(k5_context,
				       opt,
				       KRB5_GC_CANONICALIZE);

	krb5_get_creds_opt_add_options(k5_context,
				       opt,
				       KRB5_GC_NO_STORE);

	if (test_data->s4u2self) {
		torture_assert_int_equal(tctx,
					 krb5_get_creds_opt_set_impersonate(k5_context,
									    opt,
									    principal),
					 0, "krb5_get_creds_opt_set_impersonate failed");
	}

	/* Confirm if we can get a ticket to our own name */
	k5ret = krb5_get_creds(k5_context, opt, ccache, principal, &server_creds);

	/*
	 * In these situations, the code above does not store a
	 * principal in the credentials cache matching what
	 * krb5_get_creds() needs, so the test fails.
	 *
	 */
	if (test_data->canonicalize == false && test_data->enterprise == false
	    && (test_data->upper_realm == false || test_data->netbios_realm == true)) {
		torture_assert_int_equal(tctx, k5ret, KRB5_CC_NOTFOUND,
					 "krb5_get_creds should have failed with KRB5_CC_NOTFOUND");
	} else {
		assertion_message = talloc_asprintf(tctx,
						    "krb5_get_creds for %s failed: %s",
						    principal_string,
						    smb_get_krb5_error_message(k5_context, k5ret,
									       tctx));

		/*
		 * Only machine accounts (strictly, accounts with a
		 * servicePrincipalName) can expect this test to succeed
		 */
		if (torture_setting_bool(tctx, "expect_machine_account", false)
		    && (test_data->enterprise || test_data->upn == false)) {
			torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
			torture_assert_int_equal(tctx, krb5_cc_store_cred(k5_context,
									  ccache, server_creds),
						 0, "krb5_cc_store_cred failed");

			torture_assert_int_equal(tctx,
						 krb5_free_creds(k5_context,
								 server_creds),
						 0, "krb5_free_cred_contents failed");

		} else {
			torture_assert_int_equal(tctx, k5ret, KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN,
						 assertion_message);
		}

		torture_assert_int_equal(tctx,
					 test_context->packet_count,
					 1, "Expected krb5_get_creds to send packets");
	}

	/*
	 * Confirm gettting a ticket to pass to the server, running
	 * either the TEST_TGS_REQ or TEST_SELF_TRUST_TGS_REQ stage.
	 *
	 * This triggers the client to attempt to get a
	 * cross-realm ticket between the alternate names of
	 * the server, and we need to confirm that behaviour.
	 *
	 */

	/*
	 * This tries to guess when the krb5 libs will ask for a
	 * cross-realm ticket, and when they will just ask the KDC
	 * directly.
	 */
	if (test_context->test_data->canonicalize == false
	    || test_context->test_data->enterprise
	    || (test_context->test_data->upper_realm
		&& test_context->test_data->netbios_realm == false)) {
		test_context->test_stage = TEST_TGS_REQ;
	} else {
		test_context->test_stage = TEST_SELF_TRUST_TGS_REQ;
	}

	test_context->packet_count = 0;
	torture_assert_int_equal(tctx, krb5_auth_con_init(k5_context, &auth_context),
				 0, "krb5_auth_con_init failed");

	in_data.length = 0;
	k5ret = krb5_mk_req_exact(k5_context,
				  &auth_context,
				  AP_OPTS_USE_SUBKEY,
				  principal,
				  &in_data, ccache,
				  &enc_ticket);
	assertion_message = talloc_asprintf(tctx,
					    "krb5_mk_req_exact for %s failed: %s",
					    principal_string,
					    smb_get_krb5_error_message(k5_context, k5ret, tctx));

	/*
	 * Only machine accounts (strictly, accounts with a
	 * servicePrincipalName) can expect this test to succeed
	 */
	if (torture_setting_bool(tctx, "expect_machine_account", false) && (test_data->enterprise || test_data->upn == false)) {
		DATA_BLOB client_to_server;
		torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
		client_to_server = data_blob_const(enc_ticket.data, enc_ticket.length);
		torture_assert(tctx,
			       test_accept_ticket(tctx,
					popt_get_cmdline_credentials(),
						  expected_unparse_principal_string,
						  client_to_server),
			       "test_accept_ticket failed - failed to accept the ticket we just created");
		krb5_data_free(&enc_ticket);
	} else {
		torture_assert_int_equal(tctx, k5ret, KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN,
					 assertion_message);
	}

	/*
	 * Only in these cases would the above code have needed to
	 * send packets to the network
	 */
	if (test_data->canonicalize == false && test_data->enterprise == false
	    && (test_data->upper_realm == false || test_data->netbios_realm == true)) {
		torture_assert(tctx,
			       test_context->packet_count > 0,
			       "Expected krb5_mk_req_exact to send packets");
	}

	/*
	 * Confirm gettting a ticket to pass to the server, running
	 * the TEST_TGS_REQ_HOST, TEST_TGS_REQ_HOST_SRV_INST, TEST_TGS_REQ_HOST_SRV_HST stage
	 *
	 * This triggers the client to attempt to get a
	 * cross-realm ticket between the alternate names of
	 * the server, and we need to confirm that behaviour.
	 *
	 */

	if (*test_data->krb5_service && *test_data->krb5_hostname) {
		krb5_principal host_principal_srv_inst;
		/*
		 * This tries to guess when the krb5 libs will ask for a
		 * cross-realm ticket, and when they will just ask the KDC
		 * directly.
		 */
		test_context->test_stage = TEST_TGS_REQ_HOST;
		test_context->packet_count = 0;
		torture_assert_int_equal(tctx, krb5_auth_con_init(k5_context, &auth_context),
					 0, "krb5_auth_con_init failed");

		in_data.length = 0;
		k5ret = krb5_mk_req(k5_context,
				    &auth_context,
				    0,
				    test_data->krb5_service,
				    test_data->krb5_hostname,
				    &in_data, ccache,
				    &enc_ticket);

		if (test_data->canonicalize == false && test_data->enterprise == false
		    && (test_data->upper_realm == false || test_data->netbios_realm == true)) {
			torture_assert_int_equal(tctx, k5ret, KRB5_CC_NOTFOUND,
						 "krb5_get_creds should have failed with KRB5_CC_NOTFOUND");
		} else {
			assertion_message = talloc_asprintf(tctx,
							    "krb5_mk_req for %s/%s failed: %s",
							    test_data->krb5_hostname,
							    test_data->krb5_service,
							    smb_get_krb5_error_message(k5_context, k5ret, tctx));

			torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
			/*
			 * Only in these cases would the above code have needed to
			 * send packets to the network
			 */
			torture_assert(tctx,
				       test_context->packet_count > 0,
				       "Expected krb5_get_creds to send packets");
		}


		test_context->test_stage = TEST_TGS_REQ_HOST_SRV_INST;
		test_context->packet_count = 0;

		torture_assert_int_equal(tctx,
					 krb5_make_principal(k5_context, &host_principal_srv_inst,
							     test_data->real_realm,
							     strupper_talloc(tctx, test_data->krb5_service),
							     test_data->krb5_hostname,
							     NULL),
					 0, "krb5_make_principal failed");

		krb5_principal_set_type(k5_context, host_principal_srv_inst, KRB5_NT_SRV_INST);

		torture_assert_int_equal(tctx, krb5_auth_con_init(k5_context, &auth_context),
					 0, "krb5_auth_con_init failed");

		in_data.length = 0;
		k5ret = krb5_mk_req_exact(k5_context,
					  &auth_context,
					  0,
					  host_principal_srv_inst,
					  &in_data, ccache,
					  &enc_ticket);
		krb5_free_principal(k5_context, host_principal_srv_inst);
		if (test_data->canonicalize == false && test_data->enterprise == false
		    && (test_data->upper_realm == false || test_data->netbios_realm == true)) {
			torture_assert_int_equal(tctx, k5ret, KRB5_CC_NOTFOUND,
						 "krb5_get_creds should have failed with KRB5_CC_NOTFOUND");
		} else {
			assertion_message = talloc_asprintf(tctx,
							    "krb5_mk_req for %s/%s KRB5_NT_SRV_INST failed: %s",
							    test_data->krb5_service,
							    test_data->krb5_hostname,
							    smb_get_krb5_error_message(k5_context, k5ret, tctx));

			torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
			/*
			 * Only in these cases would the above code have needed to
			 * send packets to the network
			 */
			torture_assert(tctx,
				       test_context->packet_count > 0,
				       "Expected krb5_get_creds to send packets");
		}


		test_context->test_stage = TEST_TGS_REQ_HOST_SRV_HST;
		test_context->packet_count = 0;

		torture_assert_int_equal(tctx,
					 krb5_make_principal(k5_context, &host_principal_srv_inst,
							     test_data->real_realm,
							     test_data->krb5_service,
							     strupper_talloc(tctx, test_data->krb5_hostname),
							     NULL),
					 0, "krb5_make_principal failed");

		krb5_principal_set_type(k5_context, host_principal_srv_inst, KRB5_NT_SRV_HST);

		torture_assert_int_equal(tctx, krb5_auth_con_init(k5_context, &auth_context),
					 0, "krb5_auth_con_init failed");

		in_data.length = 0;
		k5ret = krb5_mk_req_exact(k5_context,
					  &auth_context,
					  0,
					  host_principal_srv_inst,
					  &in_data, ccache,
					  &enc_ticket);
		krb5_free_principal(k5_context, host_principal_srv_inst);
		if (test_data->canonicalize == false && test_data->enterprise == false
		    && (test_data->upper_realm == false || test_data->netbios_realm == true)) {
			torture_assert_int_equal(tctx, k5ret, KRB5_CC_NOTFOUND,
						 "krb5_get_creds should have failed with KRB5_CC_NOTFOUND");
		} else {
			assertion_message = talloc_asprintf(tctx,
							    "krb5_mk_req for %s/%s KRB5_NT_SRV_INST failed: %s",
							    test_data->krb5_service,
							    test_data->krb5_hostname,
							    smb_get_krb5_error_message(k5_context, k5ret, tctx));

			torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
			/*
			 * Only in these cases would the above code have needed to
			 * send packets to the network
			 */
			torture_assert(tctx,
				       test_context->packet_count > 0,
				       "Expected krb5_get_creds to send packets");
		}
	}

	/*
	 * Confirm gettting a ticket for the same krbtgt/realm that we
	 * got back with the initial ticket, running the
	 * TEST_TGS_REQ_KRBTGT stage.
	 *
	 */

	test_context->test_stage = TEST_TGS_REQ_KRBTGT;
	test_context->packet_count = 0;

	in_data.length = 0;
	k5ret = krb5_mk_req_exact(k5_context,
				  &auth_context,
				  0,
				  my_creds.server,
				  &in_data, ccache,
				  &enc_ticket);

	assertion_message = talloc_asprintf(tctx,
					    "krb5_mk_req_exact for %s failed: %s",
					    principal_string,
					    smb_get_krb5_error_message(k5_context, k5ret, tctx));
	torture_assert_int_equal(tctx, k5ret, 0, assertion_message);

	/*
	 * Confirm gettting a ticket for our own principal that we
	 * got back with the initial ticket, running the
	 * TEST_AS_REQ_SELF stage.
	 *
	 */
	test_context->test_stage = TEST_AS_REQ_SELF;
	test_context->packet_count = 0;

	k5ret = krb5_get_init_creds_password(k5_context, &my_creds, principal,
					     password, NULL, NULL, 0,
					     principal_string, krb_options);

	if (torture_setting_bool(test_context->tctx, "expect_machine_account", false) && (test_data->upn == false)) {
		assertion_message = talloc_asprintf(tctx,
						    "krb5_get_init_creds_password for %s failed: %s",
						    principal_string,
						    smb_get_krb5_error_message(k5_context, k5ret, tctx));
		torture_assert_int_equal(tctx, k5ret, 0, assertion_message);
		torture_assert(tctx,
			       test_context->packet_count >= 2,
			       "Expected krb5_get_init_creds_password to send more packets");

	} else {
		assertion_message = talloc_asprintf(tctx,
						    "Got wrong error_code from krb5_get_init_creds_password, expected KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN trying to get a ticket to %s for %s", principal_string, principal_string);
		torture_assert_int_equal(tctx, k5ret,
					 KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN,
					 assertion_message);
		torture_assert(tctx,
			       test_context->packet_count >= 1,
			       "Expected krb5_get_init_creds_password to send more packets");

		/* We can't proceed with more checks */
		return true;
	}

	/*
	 * Assert that the reply was with the correct type of
	 * principal, depending on the flags we set
	 */
	if (test_data->canonicalize == false && test_data->enterprise) {
		torture_assert_int_equal(tctx,
					 krb5_principal_get_type(k5_context,
								 my_creds.client),
					 KRB5_NT_ENTERPRISE_PRINCIPAL,
					 "smb_krb5_init_context gave incorrect client->name.name_type");
		torture_assert_int_equal(tctx,
					 krb5_principal_get_type(k5_context,
								 my_creds.server),
					 KRB5_NT_ENTERPRISE_PRINCIPAL,
					 "smb_krb5_init_context gave incorrect server->name.name_type");
	} else {
		torture_assert_int_equal(tctx,
					 krb5_principal_get_type(k5_context,
								 my_creds.client),
					 KRB5_NT_PRINCIPAL,
					 "smb_krb5_init_context gave incorrect client->name.name_type");
		torture_assert_int_equal(tctx,
					 krb5_principal_get_type(k5_context,
								 my_creds.server),
					 KRB5_NT_PRINCIPAL,
					 "smb_krb5_init_context gave incorrect server->name.name_type");
	}

	torture_assert_int_equal(tctx,
				 krb5_unparse_name(k5_context,
						   my_creds.client, &got_principal_string), 0,
				 "krb5_unparse_name failed");

	assertion_message = talloc_asprintf(tctx,
					    "krb5_get_init_creds_password returned a different principal %s to what was expected %s",
					    got_principal_string, expected_principal_string);
	krb5_free_unparsed_name(k5_context, got_principal_string);

	torture_assert(tctx, krb5_principal_compare(k5_context,
						    my_creds.client, expected_principal),
		       assertion_message);

	torture_assert_int_equal(tctx,
				 krb5_unparse_name(k5_context,
						   my_creds.client, &got_principal_string), 0,
				 "krb5_unparse_name failed");

	assertion_message = talloc_asprintf(tctx,
					    "krb5_get_init_creds_password returned a different server principal %s to what was expected %s",
					    got_principal_string, expected_principal_string);
	krb5_free_unparsed_name(k5_context, got_principal_string);

	torture_assert(tctx, krb5_principal_compare(k5_context,
						    my_creds.client, expected_principal),
		       assertion_message);

	krb5_free_principal(k5_context, principal);
	krb5_get_init_creds_opt_free(k5_context, krb_options);

	torture_assert_int_equal(tctx, krb5_free_cred_contents(k5_context, &my_creds),
				 0, "krb5_free_cred_contents failed");

	return true;
}

struct torture_suite *torture_krb5_canon(TALLOC_CTX *mem_ctx)
{
	unsigned int i;
	struct torture_suite *suite = torture_suite_create(mem_ctx, "canon");
	suite->description = talloc_strdup(suite, "Kerberos Canonicalisation tests");

	for (i = 0; i < TEST_ALL; i++) {
		char *name = talloc_asprintf(suite, "%s.%s.%s.%s.%s.%s.%s.%s.%s",
					     (i & TEST_CANONICALIZE) ? "canon" : "no-canon",
					     (i & TEST_ENTERPRISE) ? "enterprise" : "no-enterprise",
					     (i & TEST_UPPER_REALM) ? "uc-realm" : "lc-realm",
					     (i & TEST_UPPER_USERNAME) ? "uc-user" : "lc-user",
					     (i & TEST_NETBIOS_REALM) ? "netbios-realm" : "krb5-realm",
					     (i & TEST_WIN2K) ? "win2k" : "no-win2k",
					     (i & TEST_UPN) ? "upn" : "no-upn",
					     (i & TEST_S4U2SELF) ? "s4u2self" : "normal",
					     (i & TEST_REMOVEDOLLAR) ? "removedollar" : "keepdollar");

		struct test_data *test_data = talloc_zero(suite, struct test_data);

		test_data->test_name = name;
		test_data->real_realm
			= strupper_talloc(test_data,
				cli_credentials_get_realm(
					popt_get_cmdline_credentials()));
		test_data->real_domain = cli_credentials_get_domain(
						popt_get_cmdline_credentials());
		test_data->username = cli_credentials_get_username(
						popt_get_cmdline_credentials());
		test_data->real_username = cli_credentials_get_username(
						popt_get_cmdline_credentials());
		test_data->canonicalize = (i & TEST_CANONICALIZE) != 0;
		test_data->enterprise = (i & TEST_ENTERPRISE) != 0;
		test_data->upper_realm = (i & TEST_UPPER_REALM) != 0;
		test_data->upper_username = (i & TEST_UPPER_USERNAME) != 0;
		test_data->netbios_realm = (i & TEST_NETBIOS_REALM) != 0;
		test_data->win2k = (i & TEST_WIN2K) != 0;
		test_data->upn = (i & TEST_UPN) != 0;
		test_data->s4u2self = (i & TEST_S4U2SELF) != 0;
		test_data->removedollar = (i & TEST_REMOVEDOLLAR) != 0;
		torture_suite_add_simple_tcase_const(suite, name, torture_krb5_as_req_canon,
						     test_data);

	}
	return suite;
}