/*
 * This is an OpenSSL-compatible implementation of the RSA Data Security,
 * Inc. MD4 Message-Digest Algorithm.
 *
 * Written by Solar Designer <solar@openwall.com> in 2001, and placed in
 * the public domain.  See md4.c for more information.
 */

#ifndef MD4_H
#define MD4_H

#ifdef _WIN32
	#include "stdint.msvc.h"
#else
	#include <stdint.h>
#endif

struct hash_method {
	const char *name;
	/* Number of bytes that must be allocated for context */
	unsigned int context_size;
	/* Number of bytes that must be allocated for result()'s digest */
	unsigned int digest_size;

	void ( *init )( void *context );
	void ( *loop )( void *context, const void *data, size_t size );
	void ( *result )( void *context, unsigned char *digest_r );
};

const struct hash_method *hash_method_lookup( const char *name );

/* NULL-terminated list of all hash methods */
extern const struct hash_method *hash_methods[];

#define MD4_RESULTLEN ( 128 / 8 )

struct md4_context {
	uint_fast32_t lo, hi;
	uint_fast32_t a, b, c, d;
	unsigned char buffer[64];
	uint_fast32_t block[MD4_RESULTLEN];
};

void md4_init( struct md4_context *ctx );
void md4_update( struct md4_context *ctx, const void *data, size_t size );
void md4_final( struct md4_context *ctx, unsigned char result[MD4_RESULTLEN] );

void md4_get_digest( const void *data, size_t size,
					 unsigned char result[MD4_RESULTLEN] );

extern const struct hash_method hash_method_md4;

#endif