/*

 * Copyright (C) 2016 Red Hat, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * GnuTLS 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.

 *

 * GnuTLS 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 GnuTLS; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA

 */

#ifdef HAVE_CONFIG_H

#include <config.h>

#endif

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <errno.h>

#include <gnutls/gnutls.h>

#include "utils.h"

#include "eagain-common.h"

#ifndef ENABLE_SRP

void doit(void)

{

	exit(77);

}

#else

/* This test checks whether the server switching certificates is detected

 * by the client */

const char *side;

static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "%s|<%d>| %s", side, level, str);

}

#include "cert-common.h"

#define VERIF_TEST1 "CEqjUZBlkQCocfOR0E4AsPZKOFYPGjKFMHW7KDcnpE4sH4.iGMbkygb/bViRNjskF9/TQdD46Mvlt6pLs5MZoTn8mO3G.RGyXdWuIrhnVn29p41Cpc5RhTLaeUm3asW6LF60VTKnGERC0eB37xZUsaTpzmaTNdD4mOoYCN3bD9Y"

#define VERIF_TEST2 "EEbMk8afwXz/0oV5Yo9To7V6c6xkYid8meqEByxM33XjM4xeKUjeN7Ft2.xvjo4S6Js7mEs9Ov.uZtBp3ugCAbvl6G7bdfYF6z.tAD4mNYhH7iI7SwQy.ntmbJ3uJ1qB5MHW7ajSdWvA7l3SSsyyAVMe9HVQcxZKJRf4mzwm06s"

#define SALT_TEST1 "3a3xX3Myzb9YJn5X0R7sbx"

#define SALT_TEST2 "25J9FArvl1ZDrTSFsvZ4Jb"

#define PRIME "Ewl2hcjiutMd3Fu2lgFnUXWSc67TVyy2vwYCKoS9MLsrdJVT9RgWTCuEqWJrfB6uE3LsE9GkOlaZabS7M29sj5TnzUqOLJMjiwEzArfiLr9WbMRANlF68N5AVLcPWvNx6Zjl3m5Scp0BzJBz9TkgfhzKJZ.WtP3Mv/67I/0wmRZ"

gnutls_datum_t tprime = 

{

	.data = (void*)PRIME,

	.size = sizeof(PRIME)-1

};

gnutls_datum_t test1_verif = 

{

	.data = (void*)VERIF_TEST1,

	.size = sizeof(VERIF_TEST1)-1

};

gnutls_datum_t test2_verif = 

{

	.data = (void*)VERIF_TEST2,

	.size = sizeof(VERIF_TEST2)-1

};

gnutls_datum_t test1_salt = 

{

	.data = (void*)SALT_TEST1,

	.size = sizeof(SALT_TEST1)-1

};

gnutls_datum_t test2_salt = 

{

	.data = (void*)SALT_TEST2,

	.size = sizeof(SALT_TEST2)-1

};

static int

srpfunc(gnutls_session_t session, const char *username,

	gnutls_datum_t *salt, gnutls_datum_t *verifier, gnutls_datum_t *generator, gnutls_datum_t *prime)

{

	int ret;

	if (debug)

		printf("srp: username %s\n", username);

	generator->data = gnutls_malloc(1);

	generator->data[0] = 2;

	generator->size = 1;

	ret = gnutls_srp_base64_decode2(&tprime, prime);

	if (ret < 0)

		fail("error in gnutls_srp_base64_decode2 -prime\n");

	if (strcmp(username, "test1") == 0) {

		ret = gnutls_srp_base64_decode2(&test1_verif, verifier);

		if (ret < 0)

			fail("error in gnutls_srp_base64_decode2 -verif\n");

		ret = gnutls_srp_base64_decode2(&test1_salt, salt);

		if (ret < 0)

			fail("error in gnutls_srp_base64_decode2 -salt\n");

	} else if (strcmp(username, "test2") == 0) {

		ret = gnutls_srp_base64_decode2(&test2_verif, verifier);

		if (ret < 0)

			fail("error in gnutls_srp_base64_decode2 -verif\n");

		ret = gnutls_srp_base64_decode2(&test2_salt, salt);

		if (ret < 0)

			fail("error in gnutls_srp_base64_decode2 -salt\n");

	} else {

		fail("Unknown username %s\n", username);

	}

	return 0;

}

static void try(const char *prio, gnutls_kx_algorithm_t kx, unsigned allow_change)

{

	int ret;

	/* Server stuff. */

	gnutls_srp_server_credentials_t server_srp_cred;

	gnutls_certificate_credentials_t server_x509_cred;

	gnutls_dh_params_t dh_params;

	const gnutls_datum_t p3 =

	    { (unsigned char *) pkcs3, strlen(pkcs3) };

	gnutls_session_t server;

	int sret = GNUTLS_E_AGAIN;

	/* Client stuff. */

	gnutls_certificate_credentials_t client_x509_cred;

	gnutls_srp_client_credentials_t client_srp_cred;

	gnutls_srp_client_credentials_t client_srp_cred2;

	gnutls_session_t client;

	int cret = GNUTLS_E_AGAIN;

	/* General init. */

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(6);

	/* Init server */

	gnutls_srp_allocate_server_credentials(&server_srp_cred);

	gnutls_certificate_allocate_credentials(&server_x509_cred);

	gnutls_certificate_set_x509_key_mem(server_x509_cred,

					    &server_cert, &server_key,

					    GNUTLS_X509_FMT_PEM);

	gnutls_dh_params_init(&dh_params);

	gnutls_dh_params_import_pkcs3(dh_params, &p3, GNUTLS_X509_FMT_PEM);

	gnutls_certificate_set_dh_params(server_x509_cred, dh_params);

	gnutls_srp_set_server_credentials_function(server_srp_cred, srpfunc);

	if (allow_change)

		gnutls_init(&server, GNUTLS_SERVER|GNUTLS_ALLOW_ID_CHANGE);

	else

		gnutls_init(&server, GNUTLS_SERVER);

	gnutls_credentials_set(server, GNUTLS_CRD_SRP,

				server_srp_cred);

	gnutls_credentials_set(server, GNUTLS_CRD_CERTIFICATE,

				server_x509_cred);

	gnutls_priority_set_direct(server,

				   prio,

				   NULL);

	gnutls_transport_set_push_function(server, server_push);

	gnutls_transport_set_pull_function(server, server_pull);

	gnutls_transport_set_ptr(server, server);

	/* Init client */

	gnutls_srp_allocate_client_credentials(&client_srp_cred);

	gnutls_srp_allocate_client_credentials(&client_srp_cred2);

	gnutls_srp_set_client_credentials(client_srp_cred, "test1", "test");

	gnutls_srp_set_client_credentials(client_srp_cred2, "test2", "test");

	ret = gnutls_init(&client, GNUTLS_CLIENT);

	if (ret < 0)

		exit(1);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_SRP, client_srp_cred);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_allocate_credentials(&client_x509_cred);

	if (ret < 0)

		exit(1);

	ret = gnutls_certificate_set_x509_trust_mem(client_x509_cred, &ca_cert, GNUTLS_X509_FMT_PEM);

	if (ret < 0)

		exit(1);

	ret = gnutls_credentials_set(client, GNUTLS_CRD_CERTIFICATE,

				client_x509_cred);

	if (ret < 0)

		exit(1);

	ret = gnutls_priority_set_direct(client, prio, NULL);

	if (ret < 0)

		exit(1);

	gnutls_transport_set_push_function(client, client_push);

	gnutls_transport_set_pull_function(client, client_pull);

	gnutls_transport_set_ptr(client, client);

	HANDSHAKE(client, server);

	if (gnutls_kx_get(client) != kx) {

		fail("got unexpected key exchange algorithm: %s (expected %s)\n",

			gnutls_kx_get_name(gnutls_kx_get(client)),

			gnutls_kx_get_name(kx));

		exit(1);

	}

	/* switch client's username and rehandshake */

	ret = gnutls_credentials_set(client, GNUTLS_CRD_SRP, client_srp_cred2);

	if (ret < 0)

		exit(1);

	if (allow_change) {

		HANDSHAKE(client, server);

	} else {

		HANDSHAKE_EXPECT(client, server, GNUTLS_E_AGAIN, GNUTLS_E_SESSION_USER_ID_CHANGED);

	}

	gnutls_deinit(client);

	gnutls_deinit(server);

	gnutls_certificate_free_credentials(server_x509_cred);

	gnutls_srp_free_server_credentials(server_srp_cred);

	gnutls_certificate_free_credentials(client_x509_cred);

	gnutls_srp_free_client_credentials(client_srp_cred);

	gnutls_srp_free_client_credentials(client_srp_cred2);

	gnutls_dh_params_deinit(dh_params);

}

void doit(void)

{

	global_init();

	/* Allow change of ID */

	try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+SRP", GNUTLS_KX_SRP, 0);

	reset_buffers();

	try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+SRP-RSA", GNUTLS_KX_SRP_RSA, 0);

	reset_buffers();

	/* Prohibit (default) change of ID */

	try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+SRP", GNUTLS_KX_SRP, 1);

	reset_buffers();

	try("NORMAL:-VERS-ALL:+VERS-TLS1.2:-KX-ALL:+SRP-RSA", GNUTLS_KX_SRP_RSA, 1);

	reset_buffers();

	gnutls_global_deinit();

}

#endif