/**
 *
 * /brief functions for dealing with pubkey pinsets
 *
 */

/*
 * Copyright (c) 2015 ACLU
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the names of the copyright holders nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Verisign, Inc. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "context.h"
#include <nettle/base64.h>

#include "types-internal.h"

#include "pubkey-pinning.h"

/**
 ** Interfaces from pubkey-pinning.h
 **/

getdns_return_t _getdns_decode_base64(const char* str, uint8_t* res, size_t res_size)
{
	struct base64_decode_ctx ctx;
	uint8_t* lim = res + res_size;

	base64_decode_init(&ctx);

	for(; *str != '\0' && res < lim; ++str) {
		int r = base64_decode_single(&ctx, res, *str);
		if (r == -1 )
			return GETDNS_RETURN_GENERIC_ERROR;
		res += r;
	}
	return (res == lim) ? GETDNS_RETURN_GOOD : GETDNS_RETURN_GENERIC_ERROR;
}