/*
  Copyright (c) 2012-2015, Matthias Schiffer <mschiffer@universe-factory.net>
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice,
       this list of conditions and the following disclaimer.
    2. 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.

  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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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.
*/

/**
   \file

   Generated lists of MACs and their implementations
*/


#include <src/crypto.h>
#include <src/fastd.h>


@MAC_DEFINITIONS@

/** A MAC implementation */
typedef struct fastd_mac_impl {
	const char *name;			/**< The name of the MAC implementation */
	const fastd_mac_t *impl;		/**< The MAC implementation */
} fastd_mac_impl_t;

/** A MAC */
typedef struct mac_entry {
	const char *name;			/**< The name of the MAC */
	const fastd_mac_info_t *info;		/**< The associated MAC information */
	const fastd_mac_impl_t *impls;		/**< NULL-terminated array of MAC implementations */
} mac_entry_t;

@MAC_IMPLS@

/** The list of supported MACs */
static const mac_entry_t macs[] = { @MAC_LIST@
};

/** The list of chosen MAC implementations */
static const fastd_mac_t *mac_conf[array_size(macs)] = {};


/** Checks if a MAC implementation is available on the runtime platform */
static inline bool mac_available(const fastd_mac_t *mac) {
	return (!mac->available) || mac->available();
}

void fastd_mac_init(void) {
	size_t i, j;
	for (i = 0; i < array_size(macs); i++) {
		for (j = 0; macs[i].impls[j].impl; j++) {
			if (mac_available(macs[i].impls[j].impl))
				break;
		}

		mac_conf[i] = macs[i].impls[j].impl;
	}
}

bool fastd_mac_config(const char *name, const char *impl) {
	size_t i;
	for (i = 0; i < array_size(macs); i++) {
		if (!strcmp(macs[i].name, name)) {
			size_t j;
			for (j = 0; macs[i].impls[j].impl; j++) {
				if (!strcmp(macs[i].impls[j].name, impl)) {
					if (!mac_available(macs[i].impls[j].impl))
						return false;

					mac_conf[i] = macs[i].impls[j].impl;
					return true;
				}
			}

			return false;
		}
	}

	return false;
}

const fastd_mac_info_t * fastd_mac_info_get_by_name(const char *name) {
	size_t i;
	for (i = 0; i < array_size(macs); i++) {
		if (strcmp(macs[i].name, name))
			continue;

		if (mac_conf[i])
			return macs[i].info;

		break;
	}

	return NULL;
}

const fastd_mac_t * fastd_mac_get(const fastd_mac_info_t *info) {
	size_t i;
	for (i = 0; i < array_size(macs); i++) {
		if (macs[i].info == info)
			return mac_conf[i];
	}

	return NULL;
}