static void tls_log_func(int level, const char *str)

{

	fprintf(stderr, "<%d> %s", level, str);

}

/* sha1 hash of "hello" string */

const gnutls_datum_t sha1_data = {

	(void *)

	    "\xaa\xf4\xc6\x1d\xdc\xc5\xe8\xa2\xda\xbe"

	    "\xde\x0f\x3b\x48\x2c\xd9\xae\xa9\x43\x4d",

	20

};

/* sha1 hash of "hello" string */

const gnutls_datum_t sha256_data = {

	(void *)

	    "\x2c\xf2\x4d\xba\x5f\xb0\xa3\x0e\x26\xe8"

	    "\x3b\x2a\xc5\xb9\xe2\x9e\x1b\x16\x1e\x5c"

	    "\x1f\xa7\x42\x5e\x73\x04\x33\x62\x93\x8b"

	    "\x98\x24",

	32

};

const gnutls_datum_t invalid_hash_data = {

	(void *)

	    "\xaa\xf4\xc6\x1d\xdc\xca\xe8\xa2\xda\xbe"

	    "\xde\x0f\x3b\x48\x2c\xb9\xae\xa9\x43\x4d",

	20

};

const gnutls_datum_t raw_data = {

	(void *)"hello",

	5

};

static void print_keys(gnutls_privkey_t privkey, gnutls_pubkey_t pubkey)

{

	gnutls_x509_privkey_t xkey;

	gnutls_datum_t out;

	int ret = gnutls_privkey_export_x509(privkey, &xkey);

	if (ret < 0)

		fail("error in privkey export\n");

	ret = gnutls_x509_privkey_export2(xkey, GNUTLS_X509_FMT_PEM, &out;;

	if (ret < 0)

		fail("error in privkey export\n");

	fprintf(stderr, "%s\n", out.data);

	gnutls_free(out.data);

	ret = gnutls_pubkey_export2(pubkey, GNUTLS_X509_FMT_PEM, &out;;

	if (ret < 0)

		fail("error in pubkey export\n");

	fprintf(stderr, "%s\n", out.data);

	gnutls_free(out.data);

	gnutls_x509_privkey_deinit(xkey);

}

#define ERR fail("Failure at: %s (%s-%s) (iter: %d)\n", gnutls_sign_get_name(sign_algo), gnutls_pk_get_name(pk), gnutls_digest_get_name(hash), j);

static

void test_sig(gnutls_pk_algorithm_t pk, unsigned hash, unsigned bits)

{

	gnutls_pubkey_t pubkey;

	gnutls_privkey_t privkey;

	gnutls_sign_algorithm_t sign_algo;

	gnutls_datum_t signature;

	const gnutls_datum_t *hash_data;

	int ret;

	unsigned j;

	unsigned vflags = 0;

	if (hash == GNUTLS_DIG_SHA1) {

		hash_data = &sha1_data;

		vflags |= GNUTLS_VERIFY_ALLOW_SIGN_WITH_SHA1;

	} else if (hash == GNUTLS_DIG_SHA256)

		hash_data = &sha256_data;

	else

		abort();

	sign_algo =

	    gnutls_pk_to_sign(pk, hash);

	for (j = 0; j < 100; j++) {

		ret = gnutls_pubkey_init(&pubkey);

		if (ret < 0)

			ERR;

		ret = gnutls_privkey_init(&privkey);

		if (ret < 0)

			ERR;

		ret = gnutls_privkey_generate(privkey, pk, bits, 0);

		if (ret < 0)

			ERR;

		ret =

		    gnutls_privkey_sign_hash(privkey, hash,

					     0, hash_data,

					     &signature);

		if (ret < 0)

			ERR;

		ret = gnutls_pubkey_import_privkey(pubkey, privkey, GNUTLS_KEY_DIGITAL_SIGNATURE, 0);

		if (ret < 0)

			ERR;

		ret =

		    gnutls_pubkey_verify_hash2(pubkey,

						sign_algo, vflags,

						hash_data, &signature);

		if (ret < 0) {

			print_keys(privkey, pubkey);

			ERR;

		}

		/* should fail */

		ret =

		    gnutls_pubkey_verify_hash2(pubkey,

						sign_algo, vflags,

						&invalid_hash_data,

						&signature);

		if (ret != GNUTLS_E_PK_SIG_VERIFY_FAILED) {

			print_keys(privkey, pubkey);

			ERR;

		}

		sign_algo =

		    gnutls_pk_to_sign(gnutls_pubkey_get_pk_algorithm

				      (pubkey, NULL), hash);

		ret =

		    gnutls_pubkey_verify_hash2(pubkey, sign_algo, vflags,

						hash_data, &signature);

		if (ret < 0)

			ERR;

		/* should fail */

		ret =

		    gnutls_pubkey_verify_hash2(pubkey, sign_algo, vflags,

						&invalid_hash_data,

						&signature);

		if (ret != GNUTLS_E_PK_SIG_VERIFY_FAILED) {

			print_keys(privkey, pubkey);

			ERR;

		}

		/* test the raw interface */

		gnutls_free(signature.data);

		signature.data = NULL;

		if (pk == GNUTLS_PK_RSA) {

			ret =

			    gnutls_privkey_sign_hash(privkey,

						     hash,

						     GNUTLS_PRIVKEY_SIGN_FLAG_TLS1_RSA,

						     hash_data,

						     &signature);

			if (ret < 0)

				ERR;

			sign_algo =

			    gnutls_pk_to_sign

			    (gnutls_pubkey_get_pk_algorithm

			     (pubkey, NULL), hash);

			ret =

			    gnutls_pubkey_verify_hash2(pubkey,

							sign_algo,

							vflags|GNUTLS_PUBKEY_VERIFY_FLAG_TLS1_RSA,

							hash_data,

							&signature);

			if (ret < 0) {

				print_keys(privkey, pubkey);

				ERR;

			}

		}

		gnutls_free(signature.data);

		gnutls_privkey_deinit(privkey);

		gnutls_pubkey_deinit(pubkey);

	}

}