include/lib/crypto.h

/*
 * Copyright 2012, Google Inc.
 * 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 name of Google Inc. 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 THE COPYRIGHT
 * OWNER 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,
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 */

#ifndef MOSYS_LIB_CRYPTO_H__
#define MOSYS_LIB_CRYPTO_H__

#include <inttypes.h>
#include <stdlib.h>

struct crypto_algo {
	void *ctx;		/* context */
	size_t digest_len;	/* length of digest (in bytes) */

	/* Methods to initialize and manipulate context. */
	void (*init) (void *ctx);
	void (*update) (void *ctx, const void *data, unsigned long len);
	const uint8_t *(*final) (void *ctx);

	const uint8_t *(*get_digest)(struct crypto_algo *crypto);
};

extern struct crypto_algo sha1_algo;

#endif	/* MOSYS_LIB_CRYPTO__*/