/*
 * 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

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[];

typedef unsigned int uint_fast32_t;

#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