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#include <stdio.h>
#include <stdlib.h>
#include "mh_sha256.h"

#define TEST_LEN   16*1024
#define TEST_SIZE   8*1024
#define TEST_MEM   TEST_LEN
#ifndef TEST_SEED
# define TEST_SEED 0x1234
#endif

#define str(s) #s
#define xstr(s) str(s)

#define _FUNC_TOKEN(func, type)		func##type
#define FUNC_TOKEN(func, type)		_FUNC_TOKEN(func, type)

#ifndef MH_SHA256_FUNC_TYPE
#define	MH_SHA256_FUNC_TYPE
#endif

#define TEST_UPDATE_FUNCTION		FUNC_TOKEN(mh_sha256_update, MH_SHA256_FUNC_TYPE)
#define TEST_FINAL_FUNCTION		FUNC_TOKEN(mh_sha256_finalize, MH_SHA256_FUNC_TYPE)

#define CHECK_RETURN(state)		do{ \
					  if((state) != MH_SHA256_CTX_ERROR_NONE){ \
					    printf("The mh_sha256 function is failed.\n"); \
					    return 1; \
					  } \
					}while(0)

extern void mh_sha256_ref(const void *buffer, uint32_t len, uint32_t * mh_sha256_digest);
#define MH_SHA256_REF	mh_sha256_ref

// Generates pseudo-random data
void rand_buffer(uint8_t * buf, long buffer_size)
{
	long i;
	for (i = 0; i < buffer_size; i++)
		buf[i] = rand();
}

void dump(char *buf, int len)
{
	int i;
	for (i = 0; i < len;) {
		printf(" %2x", 0xff & buf[i++]);
		if (i % 32 == 0)
			printf("\n");
	}
	if (i % 32 != 0)
		printf("\n");
}

int compare_digests(uint32_t hash_ref[SHA256_DIGEST_WORDS],
		    uint32_t hash_test[SHA256_DIGEST_WORDS])
{
	int i;
	int mh_sha256_fail = 0;

	for (i = 0; i < SHA256_DIGEST_WORDS; i++) {
		if (hash_test[i] != hash_ref[i])
			mh_sha256_fail++;
	}

	if (mh_sha256_fail) {
		printf("mh_sha256 fail test\n");
		printf("ref: ");
		dump((char *)hash_ref, 32);
		printf("test: ");
		dump((char *)hash_test, 32);
	}

	return mh_sha256_fail;
}

int main(int argc, char *argv[])
{
	int fail = 0;
	uint32_t hash_test[SHA256_DIGEST_WORDS], hash_ref[SHA256_DIGEST_WORDS];
	uint8_t *buff = NULL;
	int size, offset;
	struct mh_sha256_ctx *update_ctx = NULL;

	printf(xstr(TEST_UPDATE_FUNCTION) "_test:\n");

	srand(TEST_SEED);

	buff = malloc(TEST_LEN);
	update_ctx = malloc(sizeof(*update_ctx));

	if (buff == NULL || update_ctx == NULL) {
		printf("malloc failed test aborted\n");
		return -1;
	}
	// Rand test1
	rand_buffer(buff, TEST_LEN);

	MH_SHA256_REF(buff, TEST_LEN, hash_ref);
	CHECK_RETURN(mh_sha256_init(update_ctx));
	CHECK_RETURN(TEST_UPDATE_FUNCTION(update_ctx, buff, TEST_LEN));
	CHECK_RETURN(TEST_FINAL_FUNCTION(update_ctx, hash_test));

	fail = compare_digests(hash_ref, hash_test);

	if (fail) {
		printf("fail rand1 test\n");
		return -1;
	} else
		putchar('.');

	// Test various size messages
	for (size = TEST_LEN; size >= 0; size--) {

		// Fill with rand data
		rand_buffer(buff, size);

		MH_SHA256_REF(buff, size, hash_ref);
		CHECK_RETURN(mh_sha256_init(update_ctx));
		CHECK_RETURN(TEST_UPDATE_FUNCTION(update_ctx, buff, size));
		CHECK_RETURN(TEST_FINAL_FUNCTION(update_ctx, hash_test));

		fail = compare_digests(hash_ref, hash_test);

		if (fail) {
			printf("Fail size=%d\n", size);
			return -1;
		}

		if ((size & 0xff) == 0) {
			putchar('.');
			fflush(0);
		}
	}

	// Test various buffer offsets and sizes
	printf("offset tests");
	for (size = TEST_LEN - 256; size > 256; size -= 11) {
		for (offset = 0; offset < 256; offset++) {
			MH_SHA256_REF(buff + offset, size, hash_ref);

			CHECK_RETURN(mh_sha256_init(update_ctx));
			CHECK_RETURN(TEST_UPDATE_FUNCTION(update_ctx, buff + offset, size));
			CHECK_RETURN(TEST_FINAL_FUNCTION(update_ctx, hash_test));

			fail = compare_digests(hash_ref, hash_test);

			if (fail) {
				printf("Fail size=%d\n", size);
				return -1;
			}

		}
		if ((size & 0xf) == 0) {
			putchar('.');
			fflush(0);
		}
	}

	// Run efence tests
	printf("efence tests");
	for (size = TEST_SIZE; size > 0; size--) {
		offset = TEST_LEN - size;

		MH_SHA256_REF(buff + offset, size, hash_ref);

		CHECK_RETURN(mh_sha256_init(update_ctx));
		CHECK_RETURN(TEST_UPDATE_FUNCTION(update_ctx, buff + offset, size));
		CHECK_RETURN(TEST_FINAL_FUNCTION(update_ctx, hash_test));

		fail = compare_digests(hash_ref, hash_test);

		if (fail) {
			printf("Fail size=%d\n", size);
			return -1;
		}

		if ((size & 0xf) == 0) {
			putchar('.');
			fflush(0);
		}
	}

	printf(xstr(TEST_UPDATE_FUNCTION) "_test:");
	printf(" %s\n", fail == 0 ? "Pass" : "Fail");

	return fail;
}