/*

 * Copyright (C) 2001-2015 Free Software Foundation, Inc.

 * Copyright (C) 2015 Nikos Mavrogiannopoulos

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * The GnuTLS is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>

 *

 */

#include "gnutls_int.h"

#include <extras/randomart.h>

/**

 * gnutls_random_art:

 * @type: The type of the random art (for now only %GNUTLS_RANDOM_ART_OPENSSH is supported)

 * @key_type: The type of the key (RSA, DSA etc.)

 * @key_size: The size of the key in bits

 * @fpr: The fingerprint of the key

 * @fpr_size: The size of the fingerprint

 * @art: The returned random art

 *

 * This function will convert a given fingerprint to an "artistic"

 * image. The returned image is allocated using gnutls_malloc(), is

 * null-terminated but art->size will not account the terminating null.

 *

 * Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise

 *   an error code is returned.

 *

 **/

int gnutls_random_art(gnutls_random_art_t type,

		      const char *key_type, unsigned int key_size,

		      void *fpr, size_t fpr_size, gnutls_datum_t * art)

{

	if (type != GNUTLS_RANDOM_ART_OPENSSH)

		return gnutls_assert_val(GNUTLS_E_INVALID_REQUEST);

	art->data =

	    (void *) _gnutls_key_fingerprint_randomart(fpr, fpr_size,

						       key_type, key_size,

						       NULL);

	if (art->data == NULL)

		return gnutls_assert_val(GNUTLS_E_MEMORY_ERROR);

	art->size = strlen((char *) art->data);

	return 0;

}