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#include <stdio.h>
#include <stdlib.h>		// for rand
#include <string.h>		// for memcmp
#include <aes_gcm.h>
#include <test.h>
#include "ossl_helper.h"
#include "gcm_vectors.h"

#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 AAD_LENGTH   16
#define TEST_MEM TEST_LEN

static unsigned char *plaintext, *gcm_plaintext, *cyphertext, *ossl_plaintext,
    *ossl_cyphertext, *gcm_tag, *ossl_tag, *IV, *AAD;
static uint8_t key128[GCM_128_KEY_LEN];
static uint8_t key256[GCM_256_KEY_LEN];
uint8_t iv_len = 0;

void mk_rand_data(uint8_t * data, uint32_t size)
{
	unsigned int i;
	for (i = 0; i < size; i++) {
		*data++ = rand();
	}
}

int check_data(uint8_t * test, uint8_t * expected, uint64_t len, int vect, char *data_name)
{
	int mismatch;
	int OK = 1;

	mismatch = memcmp(test, expected, len);
	if (mismatch) {
		OK = 0;
		printf("  v[%d] expected results don't match %s \t\t", vect, data_name);
		{
			uint64_t a;
			for (a = 0; a < len; a++) {
				if (test[a] != expected[a]) {
					printf(" '%x' != '%x' at %lx of %lx\n",
					       test[a], expected[a], a, len);
					break;
				}
			}
		}
	}
	return OK;
}

void aes_gcm_perf(void)
{
	struct gcm_key_data gkey, gkey256;
	struct gcm_context_data gctx;
	int i;

	printf
	    ("AES GCM performance parameters plain text length:%d; IV length:%d; ADD length:%d \n",
	     TEST_LEN, GCM_IV_LEN, AAD_LENGTH);

	mk_rand_data(key128, sizeof(key128));
	mk_rand_data(key256, sizeof(key256));

	// This is only required once for a given key
	aes_gcm_pre_128(key128, &gkey);
	aes_gcm_pre_256(key256, &gkey256);

	// Preload code cache
	aes_gcm_enc_128(&gkey, &gctx, cyphertext, plaintext, TEST_LEN, IV, AAD, AAD_LENGTH,
			gcm_tag, MAX_TAG_LEN);
	openssl_aes_gcm_enc(key128, IV, iv_len, AAD, AAD_LENGTH, ossl_tag, MAX_TAG_LEN,
			    plaintext, TEST_LEN, ossl_cyphertext);
	check_data(cyphertext, ossl_cyphertext, TEST_LEN, 0,
		   "ISA-L vs OpenSSL 128 key cypher text (C)");
	check_data(gcm_tag, ossl_tag, MAX_TAG_LEN, 0, "ISA-L vs OpenSSL 128 tag (T)");
	aes_gcm_enc_256(&gkey256, &gctx, cyphertext, plaintext, TEST_LEN, IV, AAD, AAD_LENGTH,
			gcm_tag, MAX_TAG_LEN);
	openssl_aes_256_gcm_enc(key256, IV, iv_len, AAD, AAD_LENGTH, ossl_tag, MAX_TAG_LEN,
				plaintext, TEST_LEN, ossl_cyphertext);
	check_data(cyphertext, ossl_cyphertext, TEST_LEN, 0,
		   "ISA-L vs OpenSSL 256 cypher text (C)");
	check_data(gcm_tag, ossl_tag, MAX_TAG_LEN, 0, "ISA-L vs OpenSSL 256 tag (T)");

	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			aes_gcm_enc_128(&gkey, &gctx, cyphertext, plaintext, TEST_LEN, IV, AAD,
					AAD_LENGTH, gcm_tag, MAX_TAG_LEN);
		}

		perf_stop(&stop);
		printf("        aes_gcm_enc" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}
	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			openssl_aes_gcm_enc(key128, IV, iv_len, AAD, AAD_LENGTH,
					    ossl_tag, MAX_TAG_LEN, plaintext, TEST_LEN,
					    cyphertext);
		}

		perf_stop(&stop);
		printf("openssl_aes_gcm_enc" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}
	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			aes_gcm_dec_128(&gkey, &gctx, plaintext, cyphertext, TEST_LEN, IV,
					AAD, AAD_LENGTH, gcm_tag, MAX_TAG_LEN);
			check_data(gcm_tag, gcm_tag, MAX_TAG_LEN, 0, "ISA-L check of tag (T)");
		}

		perf_stop(&stop);
		printf("        aes_gcm_dec" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}
	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			openssl_aes_gcm_dec(key128, IV, iv_len, AAD, AAD_LENGTH,
					    ossl_tag, MAX_TAG_LEN, cyphertext, TEST_LEN,
					    plaintext);
		}

		perf_stop(&stop);
		printf("openssl_aes_gcm_dec" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}

	printf("\n");
	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			aes_gcm_enc_256(&gkey256, &gctx, cyphertext, plaintext, TEST_LEN, IV,
					AAD, AAD_LENGTH, gcm_tag, MAX_TAG_LEN);
		}

		perf_stop(&stop);
		printf("         aes_gcm256_enc" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}

	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			openssl_aes_256_gcm_enc(key256, IV, iv_len, AAD, AAD_LENGTH,
						ossl_tag, MAX_TAG_LEN, plaintext, TEST_LEN,
						cyphertext);
		}

		perf_stop(&stop);
		printf("openssl_aes_256_gcm_enc" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}

	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			aes_gcm_dec_256(&gkey256, &gctx, plaintext, cyphertext, TEST_LEN, IV,
					AAD, AAD_LENGTH, gcm_tag, MAX_TAG_LEN);
			check_data(gcm_tag, gcm_tag, MAX_TAG_LEN, 0,
				   "ISA-L check of 256 tag (T)");
		}

		perf_stop(&stop);
		printf("         aes_gcm256_dec" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}
	{
		struct perf start, stop;

		perf_start(&start);
		for (i = 0; i < TEST_LOOPS; i++) {
			openssl_aes_256_gcm_dec(key256, IV, iv_len, AAD, AAD_LENGTH,
						ossl_tag, MAX_TAG_LEN, cyphertext, TEST_LEN,
						plaintext);
		}

		perf_stop(&stop);
		printf("openssl_aes_256_gcm_dec" TEST_TYPE_STR ":\t");
		perf_print(stop, start, (long long)TEST_LEN * i);
	}
}

int main(void)
{
	uint8_t const IVend[] = GCM_IV_END_MARK;
	uint32_t OK = 1;

	plaintext = malloc(TEST_LEN);
	gcm_plaintext = malloc(TEST_LEN);
	cyphertext = malloc(TEST_LEN);
	ossl_plaintext = malloc(TEST_LEN + 16);
	ossl_cyphertext = malloc(TEST_LEN);
	gcm_tag = malloc(MAX_TAG_LEN);
	ossl_tag = malloc(MAX_TAG_LEN);
	AAD = malloc(AAD_LENGTH);
	IV = malloc(GCM_IV_LEN);
	if ((NULL == plaintext) || (NULL == cyphertext) || (NULL == gcm_plaintext)
	    || (NULL == ossl_plaintext) || (NULL == ossl_cyphertext)
	    || (NULL == gcm_tag) || (NULL == ossl_tag) || (NULL == AAD) || (NULL == IV)) {
		printf("malloc of testsize:0x%x failed\n", TEST_LEN);
		return -1;
	}

	mk_rand_data(plaintext, TEST_LEN);
	mk_rand_data(AAD, AAD_LENGTH);
	mk_rand_data(IV, GCM_IV_LEN);
	memcpy(&IV[GCM_IV_END_START], IVend, sizeof(IVend));
	iv_len = GCM_IV_LEN - sizeof(IVend);	//end marker not part of IV length

	aes_gcm_perf();
	printf("AES gcm ISA-L vs OpenSSL performance\n");

	return !OK;
}
