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#include <stdio.h>
#include <stdlib.h>		// for rand
#include <string.h>		// for memcmp
#include "aes_xts.h"
#include "test.h"

#include <openssl/evp.h>

//#define CACHED_TEST
#ifdef CACHED_TEST
// Cached test, loop many times over small dataset
# define TEST_LEN     8*1024
# define TEST_LOOPS   400000
# define TEST_TYPE_STR "_warm"
#else
// Uncached test.  Pull from large mem base.
# define GT_L3_CACHE  32*1024*1024	/* some number > last level cache */
# define TEST_LEN     (2 * GT_L3_CACHE)
# define TEST_LOOPS   50
# define TEST_TYPE_STR "_cold"
#endif

#define TEST_MEM TEST_LEN

void mk_rand_data(unsigned char *k1, unsigned char *k2, unsigned char *k3, unsigned char *p,
		  int n)
{
	int i;
	for (i = 0; i < 16; i++) {
		*k1++ = rand();
		*k2++ = rand();
		*k3++ = rand();
	}
	for (i = 0; i < n; i++)
		*p++ = rand();

}

static inline
    int openssl_aes_128_xts_dec(EVP_CIPHER_CTX * ctx, unsigned char *key, unsigned char *iv,
				unsigned char *ct, unsigned char *dt)
{
	int outlen, tmplen;
	if (!EVP_DecryptInit_ex(ctx, EVP_aes_128_xts(), NULL, key, iv))
		printf("\n ERROR!! \n");
	if (!EVP_DecryptUpdate(ctx, dt, &outlen, (const unsigned char *)ct, TEST_LEN))
		printf("\n ERROR!! \n");
	if (!EVP_DecryptFinal_ex(ctx, dt + outlen, &tmplen))
		printf("\n ERROR!! \n");

	return 0;
}

int main(void)
{
	int i;

	unsigned char key1[16], key2[16], tinit[16];
	unsigned char *pt, *ct, *dt, *refdt;
	unsigned char keyssl[32];	/* SSL takes both keys together */
	struct perf start, stop;

	/* Initialise our cipher context, which can use same input vectors */
	EVP_CIPHER_CTX *ctx;
	ctx = EVP_CIPHER_CTX_new();

	printf("aes_xts_128_dec_perf:\n");

	pt = malloc(TEST_LEN);
	ct = malloc(TEST_LEN);
	dt = malloc(TEST_LEN);
	refdt = malloc(TEST_LEN);

	if (NULL == pt || NULL == ct || NULL == dt || NULL == refdt) {
		printf("malloc of testsize failed\n");
		return -1;
	}

	mk_rand_data(key1, key2, tinit, pt, TEST_LEN);
	/* Set up key for the SSL engine */
	for (i = 0; i < 16; i++) {
		keyssl[i] = key1[i];
		keyssl[i + 16] = key2[i];
	}

	/* Encrypt and compare decrypted output */
	XTS_AES_128_enc(key2, key1, tinit, TEST_LEN, pt, ct);
	XTS_AES_128_dec(key2, key1, tinit, TEST_LEN, ct, dt);
	openssl_aes_128_xts_dec(ctx, keyssl, tinit, ct, refdt);
	if (memcmp(dt, refdt, TEST_LEN)) {
		printf("ISA-L and OpenSSL results don't match\n");
		return -1;
	}

	/* Time ISA-L decryption */
	perf_start(&start);
	for (i = 0; i < TEST_LOOPS; i++)
		XTS_AES_128_dec(key2, key1, tinit, TEST_LEN, ct, dt);
	perf_stop(&stop);
	printf("aes_xts_128_dec" TEST_TYPE_STR ": ");
	perf_print(stop, start, (long long)TEST_LEN * i);

	/* Time OpenSSL decryption */
	perf_start(&start);
	for (i = 0; i < TEST_LOOPS; i++)
		openssl_aes_128_xts_dec(ctx, keyssl, tinit, ct, refdt);
	perf_stop(&stop);
	printf("aes_xts_128_openssl_dec" TEST_TYPE_STR ": ");
	perf_print(stop, start, (long long)TEST_LEN * i);

	EVP_CIPHER_CTX_free(ctx);

	return 0;
}
