#include <string.h>
#include <openssl/evp.h>
#include <openssl/hmac.h>
#include <hmac.h>

int
main(void)
{
	uint8_t         tmp1[EVP_MAX_MD_SIZE];
	uint8_t         tmp2[EVP_MAX_MD_SIZE];
	char key[256];
	char data[4096];
	unsigned int tmp1len;
	size_t tmp2len;
	void *e1;
	int e2;
	int stop = 0;
	const void *evps[] = {
		EVP_md2(),
		EVP_md4(),
		EVP_md5(),
		EVP_ripemd160(),
		EVP_sha1(),
		EVP_sha224(),
		EVP_sha256(),
		EVP_sha384(),
		EVP_sha512(),
	};
	const char *names[] = {
		"md2",
		"md4",
		"md5",
		"rmd160",
		"sha1",
		"sha224",
		"sha256",
		"sha384",
		"sha512",
	};

	for (size_t k = 0; k < sizeof(key); k++)
		key[k] = k;
	for (size_t d = 0; d < sizeof(data); d++)
		data[d] = arc4random() % 256;

	for (size_t t = 0; t < __arraycount(names); t++)
	for (size_t i = 1; i < sizeof(key); i += 9)
		for (size_t j = 3; j < sizeof(data); j += 111) {
			printf("%s: keysize = %zu datasize = %zu\n", names[t],
			    i, j);
			memset(tmp1, 0, sizeof(tmp1));
			memset(tmp2, 0, sizeof(tmp2));
			e1 = HMAC(evps[t], key, i, data, j, tmp1, &tmp1len);
			e2 = hmac(names[t], key, i, data, j, tmp2, &tmp2len);
//			printf("%p %d\n", e1, e2);
			printf("tmplen = %u %zu\n", tmp1len, tmp2len);
			for (size_t k = 0; k < tmp2len; k++)
				if (tmp1[k] != tmp2[k]) {
					stop = 1;
					printf("%zu %.2x %.2x\n",
					    k, tmp1[k], tmp2[k]);
				}
			if (stop)
				return 0;
		}
			
	return 0;
}