/*  Self-test demonstration program
 *
 *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
 *
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 */

#if defined(CONFIG_STDOUT_CONSOLE)
#include <stdio.h>
#define  MBEDTLS_PRINT printf
#else
#include <misc/printk.h>
#define  MBEDTLS_PRINT printk
#endif /* CONFIG_STDOUT_CONSOLE */

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#include <zephyr.h>
#include <linker/sections.h>
#include <errno.h>

#include <tc_util.h>
#include <ztest.h>

#if !defined(CONFIG_MBEDTLS_CFG_FILE)
#include "mbedtls/config.h"
#else
#include CONFIG_MBEDTLS_CFG_FILE
#endif

#include "mbedtls/entropy.h"
#include "mbedtls/entropy_poll.h"
#include "mbedtls/hmac_drbg.h"
#include "mbedtls/ctr_drbg.h"
#include "mbedtls/dhm.h"
#include "mbedtls/gcm.h"
#include "mbedtls/ccm.h"
#include "mbedtls/md2.h"
#include "mbedtls/md4.h"
#include "mbedtls/md5.h"
#include "mbedtls/ripemd160.h"
#include "mbedtls/sha1.h"
#include "mbedtls/sha256.h"
#include "mbedtls/sha512.h"
#include "mbedtls/arc4.h"
#include "mbedtls/des.h"
#include "mbedtls/aes.h"
#include "mbedtls/camellia.h"
#include "mbedtls/base64.h"
#include "mbedtls/bignum.h"
#include "mbedtls/rsa.h"
#include "mbedtls/x509.h"
#include "mbedtls/xtea.h"
#include "mbedtls/pkcs5.h"
#include "mbedtls/ecp.h"
#include "mbedtls/ecjpake.h"
#include "mbedtls/timing.h"
#include "mbedtls/cmac.h"

#if defined(MBEDTLS_PLATFORM_C)
#include "mbedtls/platform.h"
#else
#include <stdio.h>
#include <stdlib.h>
#define mbedtls_printf     printf
#define mbedtls_snprintf   snprintf
#define mbedtls_exit       exit
#define MBEDTLS_EXIT_SUCCESS EXIT_SUCCESS
#define MBEDTLS_EXIT_FAILURE EXIT_FAILURE
#endif

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
#include "mbedtls/memory_buffer_alloc.h"
#endif

#if defined(MBEDTLS_RSA_C)
int rand(void)
{
	static u32_t seed = 7;

	seed ^= seed << 13;
	seed ^= seed >> 17;
	seed ^= seed << 5;

	return seed;
}

#endif

static int test_snprintf(size_t n, const char ref_buf[10], int ref_ret)
{
	int ret;
	char buf[10] = "xxxxxxxxx";
	const char ref[10] = "xxxxxxxxx";

	ret = mbedtls_snprintf(buf, n, "%s", "123");
	if (ret < 0 || (size_t) ret >= n) {
		ret = -1;
	}

	if (strncmp(ref_buf, buf, sizeof(buf)) != 0 ||
	    ref_ret != ret || memcmp(buf + n, ref + n, sizeof(buf) - n) != 0) {
		return 1;
	}

	return 0;
}

static int run_test_snprintf(void)
{
	return (test_snprintf(0, "xxxxxxxxx", -1) != 0 ||
		test_snprintf(1, "", -1) != 0 ||
		test_snprintf(2, "1", -1) != 0 ||
		test_snprintf(3, "12", -1) != 0 ||
		test_snprintf(4, "123", 3) != 0 ||
		test_snprintf(5, "123", 3) != 0);
}

/*
 * Check if a seed file is present, and if not create one for the entropy
 * self-test. If this fails, we attempt the test anyway, so no error is passed
 * back.
 */
#if defined(MBEDTLS_ENTROPY_C) && defined(MBEDTLS_ENTROPY_NV_SEED) && \
	!defined(MBEDTLS_NO_PLATFORM_ENTROPY)
static void create_entropy_seed_file(void)
{
	int result;
	size_t output_len = 0;
	unsigned char seed_value[MBEDTLS_ENTROPY_BLOCK_SIZE];

/* Attempt to read the entropy seed file. If this fails - attempt to write
 * to the file to ensure one is present.
 */
	result = mbedtls_platform_std_nv_seed_read(seed_value,
						   MBEDTLS_ENTROPY_BLOCK_SIZE);
	if (result == 0) {
		return;
	}

	result = mbedtls_platform_entropy_poll(NULL,
					       seed_value,
					       MBEDTLS_ENTROPY_BLOCK_SIZE,
					       &output_len);
	if (result != 0) {
		return;
	}

	if (output_len != MBEDTLS_ENTROPY_BLOCK_SIZE) {
		return;
	}

	mbedtls_platform_std_nv_seed_write(seed_value,
					   MBEDTLS_ENTROPY_BLOCK_SIZE);
}
#endif

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
unsigned char buf[16384];
#endif

void test_mbedtls(void)
{
	int v, suites_tested = 0, suites_failed = 0;

	void *pointer;

	mbedtls_platform_set_printf(MBEDTLS_PRINT);

	TC_START("Performing mbedTLS crypto tests:");

/*
 * The C standard doesn't guarantee that all-bits-0 is the representation
 * of a NULL pointer. We do however use that in our code for initializing
 * structures, which should work on every modern platform. Let's be sure.
 */
	memset(&pointer, 0, sizeof(void *));
	if (pointer != NULL) {
		mbedtls_printf("all-bits-zero is not a NULL pointer\n");
		mbedtls_exit(MBEDTLS_EXIT_FAILURE);
	}

	/*
	 * Make sure we have a snprintf that correctly zero-terminates
	 */
	if (run_test_snprintf() != 0) {
		mbedtls_printf("the snprintf implementation is broken\n");
		mbedtls_exit(MBEDTLS_EXIT_FAILURE);
	}

	v = 1;
	mbedtls_printf("\n");

#if defined(MBEDTLS_SELF_TEST)

#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
	mbedtls_memory_buffer_alloc_init(buf, sizeof(buf));
#endif

#if defined(MBEDTLS_MD2_C)
	if (mbedtls_md2_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_MD4_C)
	if (mbedtls_md4_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_MD5_C)
	if (mbedtls_md5_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_RIPEMD160_C)
	if (mbedtls_ripemd160_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_SHA1_C)
	if (mbedtls_sha1_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_SHA256_C)
	if (mbedtls_sha256_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_SHA512_C)
	if (mbedtls_sha512_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_ARC4_C)
	if (mbedtls_arc4_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_DES_C)
	if (mbedtls_des_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_AES_C)
	if (mbedtls_aes_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_GCM_C) && defined(MBEDTLS_AES_C)
	if (mbedtls_gcm_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_CCM_C) && defined(MBEDTLS_AES_C)
	if (mbedtls_ccm_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_BASE64_C)
	if (mbedtls_base64_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_BIGNUM_C)
	if (mbedtls_mpi_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_RSA_C)
	if (mbedtls_rsa_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_X509_USE_C)
	if (mbedtls_x509_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_XTEA_C)
	if (mbedtls_xtea_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_CAMELLIA_C)
	if (mbedtls_camellia_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_CTR_DRBG_C)
	if (mbedtls_ctr_drbg_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_HMAC_DRBG_C)
	if (mbedtls_hmac_drbg_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_ECP_C)
	if (mbedtls_ecp_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_ECJPAKE_C)
	if (mbedtls_ecjpake_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_DHM_C)
	if (mbedtls_dhm_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_ENTROPY_C)

#if defined(MBEDTLS_ENTROPY_NV_SEED) && !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
	create_entropy_seed_file();
#endif

	if (mbedtls_entropy_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_PKCS5_C)
	if (mbedtls_pkcs5_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#if defined(MBEDTLS_CMAC_C) \
	&& (defined(MBEDTLS_AES_C) || defined(MBEDTLS_DES_C))
	if (mbedtls_cmac_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

/* Slow tests last */

#if defined(MBEDTLS_TIMING_C)
	if (mbedtls_timing_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

#else
	mbedtls_printf(" MBEDTLS_SELF_TEST not defined.\n");
#endif

	if (v != 0) {
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C) && defined(MBEDTLS_MEMORY_DEBUG)
		mbedtls_memory_buffer_alloc_status();
#endif
	}
#if defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
	mbedtls_memory_buffer_alloc_free();
	if (mbedtls_memory_buffer_alloc_self_test(v) != 0) {
		suites_failed++;
	}
	suites_tested++;
#endif

	if (v != 0) {
		mbedtls_printf("  Executed %d test suites\n\n", suites_tested);

		if (suites_failed > 0) {
			mbedtls_printf("  [ %d tests FAIL ]\n\n",
				       suites_failed);
			TC_END_RESULT(TC_FAIL);
			TC_END_REPORT(TC_FAIL);
		} else {
			mbedtls_printf("  [ All tests PASS ]\n\n");
			TC_END_RESULT(TC_PASS);
			TC_END_REPORT(TC_PASS);
		}
#if defined(_WIN32)
		mbedtls_printf("  Press Enter to exit this program.\n");
		fflush(stdout);
		getchar();
#endif
	}

	while (1) {
	}
}