/*

 * Soft:        Perform a GET query to a remote HTTP/HTTPS server.

 *              Set a timer to compute global remote server response

 *              time.

 *

 * Part:        Hash-related declarations (to break circular deps).

 *

 * Authors:     Jan Pokorny, <jpokorny@redhat.com>

 *

 *              This program is distributed in the hope that it will be useful,

 *              but WITHOUT ANY WARRANTY; without even the implied warranty of

 *              MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 *              See the GNU General Public License for more details.

 *

 *              This program is free software; you can redistribute it and/or

 *              modify it under the terms of the GNU General Public License

 *              as published by the Free Software Foundation; either version

 *              2 of the License, or (at your option) any later version.

 *

 * Copyright 2013 Red Hat, Inc.

 * Copyright (C) 2014-2017 Alexandre Cassen, <acassen@gmail.com>

 */

#ifndef _HASH_H

#define _HASH_H

/* system includes */

#include <openssl/md5.h>

#ifdef _WITH_SHA1_

#include <openssl/sha.h>

#endif

/* available hashes enumeration */

enum feat_hashes {

	hash_first,

	hash_md5 = hash_first,

#ifdef _WITH_SHA1_

	hash_sha1,

#endif

	hash_guard,

	hash_default = hash_md5,

};

typedef union {

	MD5_CTX			md5;

#ifdef _WITH_SHA1_

	SHA_CTX			sha;

#endif

	/* this is due to poor C standard/draft wording (wrapped):

	   https://groups.google.com/forum/#!msg/comp.lang.c/

	   1kQMGXhgn4I/0VBEYG_ji44J */

	char			*dummy;

} hash_context_t;

typedef int (*hash_init_f)(hash_context_t *);

typedef int (*hash_update_f)(hash_context_t *, const void *, unsigned long);

typedef int (*hash_final_f)(unsigned char *, hash_context_t *);

typedef struct {

	hash_init_f		init;

	hash_update_f		update;

	hash_final_f		final;

	unsigned char		length;		/* length of the digest */

	const char		*id;		/* command-line handing + help */

	const char		*label;		/* final output */

} hash_t;

#endif