/*
 * Copyright (c) 2017 Stephen Heumann
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

struct md5_context {
	unsigned long length;
	unsigned long length2;
	unsigned short extra;
	unsigned char reserved1[30];
	unsigned char hash[16];
	unsigned char reserved2[4];
	unsigned char block[64];
};

/*
 * The context structure must be in bank 0, preferably page-aligned.
 */

/*
 * Initialize a MD5 context.
 * This must be called before any of the other MD5 functions.
 */
void md5_init(struct md5_context *context);

/*
 * Update a MD5 context based on the specified data.
 */
void md5_update(struct md5_context *context, const unsigned char *data, unsigned long length);

/*
 * Finish MD5 processing and generate the final hash code.
 */
void md5_finalize(struct md5_context *context);

/*
 * Process one 64-byte block through the MD5 hashing function.
 * This is a low-level function; users should normally not call this directly.
 */
void md5_processblock(struct md5_context *context);