/*
 * Copyright (c) 2008 - 2009
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of libobjfw. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE included in
 * the packaging of this file.
 */

#import "OFObject.h"
#import "OFString.h"

#define OF_MD5_DIGEST_SIZE  16
#define OF_SHA1_DIGEST_SIZE 20

extern int _OFHashing_reference;

/**
 * The OFMD5Hash class provides functions to create an MD5 hash.
 */
@interface OFMD5Hash: OFObject
{
	uint32_t buf[4];
	uint32_t bits[2];
	uint8_t	 in[64];

	BOOL	 calculated;
}

/**
 * \return A new autoreleased MD5 Hash
 */
+ md5Hash;

- init;

/**
 * Adds a buffer to the hash to be calculated.
 *
 * \param buf The buffer which should be included into calculation.
 * \param size The size of the buffer
 */
- updateWithBuffer: (const char*)buf
	    ofSize: (size_t)size;

/**
 * \return A buffer containing the hash (OF_MD5_DIGEST_SIZE = 16 bytes).
 *	   The buffer is part of object's memory pool.
 */
- (uint8_t*)digest;
@end

/**
 * The OFSHA1Hash class provides functions to create an SHA1 hash.
 */
@interface OFSHA1Hash: OFObject
{
	uint32_t state[5];
	uint64_t count;
	char	 buffer[64];
	uint8_t	 digest[OF_SHA1_DIGEST_SIZE];

	BOOL	 calculated;
}

/**
 * \return A new autoreleased SHA1 Hash
 */
+ sha1Hash;

- init;

/**
 * Adds a buffer to the hash to be calculated.
 *
 * \param buf The buffer which should be included into calculation.
 * \param size The size of the buffer
 */
- updateWithBuffer: (const char*)buf
	    ofSize: (size_t)size;

/**
 * \return A buffer containing the hash (OF_SHA1_DIGEST_SIZE = 20 bytes).
 *	   The buffer is part of object's memory pool.
 */
- (uint8_t*)digest;
@end

/**
 * The OFString (OFHashing) category provides methods to calculate hashes for
 * strings.
 */
@interface OFString (OFHashing)
/**
 * \return The MD5 hash of the string as an autoreleased OFString
 */
- (OFString*)md5Hash;

/**
 * \return The SHA1 hash of the string as an autoreleased OFString
 */
- (OFString*)sha1Hash;
@end
