/*

 * Copyright (C) 2008-2014 Free Software Foundation, Inc.

 *

 * Author: Simon Josefsson, 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 <unistd.h>

#include <gnutls/gnutls.h>

#include <gnutls/x509.h>

#include "../utils.h"

#include "softhsm.h"

#include "../test-chains.h"

#define CONFIG "softhsm-chainverify.config"

#define DEFAULT_THEN 1256803113

static time_t then = DEFAULT_THEN;

/* GnuTLS internally calls time() to find out the current time when

   verifying certificates.  To avoid a time bomb, we hard code the

   current time.  This should work fine on systems where the library

   call to time is resolved at run-time.  */

static time_t mytime(time_t * t)

{

	if (t)

		*t = then;

	return then;

}

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

{

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

}

static

int pin_func(void* userdata, int attempt, const char* url, const char *label,

		unsigned flags, char *pin, size_t pin_max)

{

	if (attempt == 0) {

		strcpy(pin, "1234");

		return 0;

	}

	return -1;

}

void doit(void)

{

	int exit_val = 0;

	size_t i;

	int ret;

	const char *lib, *bin;

	gnutls_typed_vdata_st vdata[2];

	char buf[128];

	/* The overloading of time() seems to work in linux (ELF?)

	 * systems only. Disable it on windows.

	 */

#ifdef _WIN32

	exit(77);

#endif

	bin = softhsm_bin();

	lib = softhsm_lib();

	ret = global_init();

	if (ret != 0) {

		fail("%d: %s\n", ret, gnutls_strerror(ret));

		exit(1);

	}

	gnutls_pkcs11_set_pin_function(pin_func, NULL);

	gnutls_global_set_time_function(mytime);

	gnutls_global_set_log_function(tls_log_func);

	if (debug)

		gnutls_global_set_log_level(4711);

	set_softhsm_conf(CONFIG);

	snprintf(buf, sizeof(buf), "%s --init-token --slot 0 --label test --so-pin 1234 --pin 1234", bin);

	system(buf);

	ret = gnutls_pkcs11_add_provider(lib, "trusted");

	if (ret < 0) {

		fprintf(stderr, "gnutls_x509_crt_init: %s\n",

			gnutls_strerror(ret));

		exit(1);

	}

	for (i = 0; chains[i].chain; i++) {

		gnutls_x509_trust_list_t tl;

		unsigned int verify_status;

		gnutls_x509_crt_t certs[MAX_CHAIN];

		gnutls_x509_crt_t ca;

		gnutls_datum_t tmp;

		size_t j;

		gnutls_x509_trust_list_iter_t get_ca_iter;

		gnutls_datum_t get_ca_datum_test;

		gnutls_datum_t get_ca_datum;

		gnutls_x509_crt_t get_ca_crt;

		if (debug)

			printf("Chain '%s' (%d)...\n", chains[i].name,

			       (int) i);

		if (chains[i].notfips && gnutls_fips140_mode_enabled()) {

			if (debug)

				printf("Skipping in FIPS mode...\n");

			continue;

		}

		for (j = 0; chains[i].chain[j]; j++) {

			if (debug > 2)

				printf("\tAdding certificate %d...",

				       (int) j);

			ret = gnutls_x509_crt_init(&certs[j]);

			if (ret < 0) {

				fprintf(stderr,

					"gnutls_x509_crt_init[%d,%d]: %s\n",

					(int) i, (int) j,

					gnutls_strerror(ret));

				exit(1);

			}

			tmp.data = (unsigned char *) chains[i].chain[j];

			tmp.size = strlen(chains[i].chain[j]);

			ret =

			    gnutls_x509_crt_import(certs[j], &tmp,

						   GNUTLS_X509_FMT_PEM);

			if (debug > 2)

				printf("done\n");

			if (ret < 0) {

				fprintf(stderr,

					"gnutls_x509_crt_import[%s,%d]: %s\n",

					chains[i].name, (int) j,

					gnutls_strerror(ret));

				exit(1);

			}

			gnutls_x509_crt_print(certs[j],

					      GNUTLS_CRT_PRINT_ONELINE,

					      &tmp);

			if (debug)

				printf("\tCertificate %d: %.*s\n", (int) j,

				       tmp.size, tmp.data);

			gnutls_free(tmp.data);

		}

		if (debug > 2)

			printf("\tAdding CA certificate...");

		ret = gnutls_x509_crt_init(&ca);

		if (ret < 0) {

			fprintf(stderr, "gnutls_x509_crt_init: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		tmp.data = (unsigned char *) *chains[i].ca;

		tmp.size = strlen(*chains[i].ca);

		ret =

		    gnutls_x509_crt_import(ca, &tmp, GNUTLS_X509_FMT_PEM);

		if (ret < 0) {

			fprintf(stderr, "gnutls_x509_crt_import: %s\n",

				gnutls_strerror(ret));

			exit(1);

		}

		if (debug > 2)

			printf("done\n");

		gnutls_x509_crt_print(ca, GNUTLS_CRT_PRINT_ONELINE, &tmp);

		if (debug)

			printf("\tCA Certificate: %.*s\n", tmp.size,

			       tmp.data);

		gnutls_free(tmp.data);

		if (debug)

			printf("\tVerifying...");

		/* initialize softhsm token */

		ret = gnutls_pkcs11_token_init(SOFTHSM_URL, "1234", "test");

		if (ret < 0) {

			fail("gnutls_pkcs11_token_init\n");

			exit(1);

		}

		/* write CA certificate to softhsm */

		ret = gnutls_pkcs11_copy_x509_crt(SOFTHSM_URL, ca, "test-ca", GNUTLS_PKCS11_OBJ_FLAG_MARK_TRUSTED|

			GNUTLS_PKCS11_OBJ_FLAG_MARK_CA|

			GNUTLS_PKCS11_OBJ_FLAG_LOGIN_SO);

		if (ret < 0) {

			fail("gnutls_pkcs11_copy_x509_crt: %s\n", gnutls_strerror(ret));

		}

		gnutls_x509_trust_list_init(&tl, 0);

		ret = gnutls_x509_trust_list_add_trust_file(tl, SOFTHSM_URL, NULL, 0, 0, 0);

		if (ret < 0) {

			fail("gnutls_x509_trust_list_add_trust_file: %s\n", gnutls_strerror(ret));

			exit(1);

		}

		if (ret < 1) {

			fail("gnutls_x509_trust_list_add_trust_file returned zero!\n");

			exit(1);

		}

		/* test trust list iteration */

		get_ca_iter = NULL;

		while (gnutls_x509_trust_list_iter_get_ca(tl, &get_ca_iter, &get_ca_crt) == 0) {

			ret = gnutls_x509_crt_export2(get_ca_crt, GNUTLS_X509_FMT_PEM, &get_ca_datum_test);

			if (ret < 0) {

				fail("gnutls_x509_crt_export2: %s\n", gnutls_strerror(ret));

				exit(1);

			}

			ret = gnutls_x509_crt_export2(ca, GNUTLS_X509_FMT_PEM, &get_ca_datum);

			if (ret < 0) {

				fail("gnutls_x509_crt_export2: %s\n", gnutls_strerror(ret));

				exit(1);

			}

			if (get_ca_datum_test.size != get_ca_datum.size ||

			    memcmp(get_ca_datum_test.data, get_ca_datum.data, get_ca_datum.size) != 0) {

				fail("gnutls_x509_trist_list_iter_get_ca: Unexpected certificate (%u != %u):\n\n%s\n\nvs.\n\n%s", get_ca_datum.size, get_ca_datum_test.size, get_ca_datum.data, get_ca_datum_test.data);

				exit(1);

			}

			gnutls_free(get_ca_datum.data);

			gnutls_free(get_ca_datum_test.data);

			gnutls_x509_crt_deinit(get_ca_crt);

		}

		vdata[0].type = GNUTLS_DT_KEY_PURPOSE_OID;

		vdata[0].data = (void *)chains[i].purpose;

		if (chains[i].expected_time != 0)

			then = chains[i].expected_time;

		else

			then = DEFAULT_THEN;

		/* make sure that the two functions don't diverge */

		ret = gnutls_x509_trust_list_verify_crt2(tl, certs, j,

						vdata,

						chains[i].purpose==NULL?0:1,

						chains[i].verify_flags,

						&verify_status, NULL);

		if (ret < 0) {

			fprintf(stderr,

				"gnutls_x509_crt_list_verify[%d,%d]: %s\n",

				(int) i, (int) j, gnutls_strerror(ret));

			exit(1);

		}

		if (verify_status != chains[i].expected_verify_result) {

			gnutls_datum_t out1, out2;

			gnutls_certificate_verification_status_print

			    (verify_status, GNUTLS_CRT_X509, &out1, 0);

			gnutls_certificate_verification_status_print(chains

								     [i].

								     expected_verify_result,

								     GNUTLS_CRT_X509,

								     &out2,

								     0);

			fail("chain[%s]:\nverify_status: %d: %s\nexpected: %d: %s\n", chains[i].name, verify_status, out1.data, chains[i].expected_verify_result, out2.data);

			gnutls_free(out1.data);

			gnutls_free(out2.data);

#if 0

			j = 0;

			do {

				fprintf(stderr, "%s\n",

					chains[i].chain[j]);

			}

			while (chains[i].chain[++j] != NULL);

#endif

			if (!debug)

				exit(1);

		} else if (debug)

			printf("done\n");

		if (debug)

			printf("\tCleanup...");

		gnutls_x509_trust_list_deinit(tl, 0);

		gnutls_x509_crt_deinit(ca);

		for (j = 0; chains[i].chain[j]; j++)

			gnutls_x509_crt_deinit(certs[j]);

		if (debug)

			printf("done\n\n\n");

	}

	gnutls_global_deinit();

	if (debug)

		printf("Exit status...%d\n", exit_val);

	remove(CONFIG);

	exit(exit_val);

}