/*
* Copyright (c) 2008 - 2010
* Jonathan Schleifer <js@webkeks.org>
*
* All rights reserved.
*
* This file is part of ObjFW. 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;
/**
* \brief A base class for classes providing hash functions.
*/
@interface OFHash: OFObject
{
BOOL calculated;
}
#ifdef OF_HAVE_PROPERTIES
@property (readonly) BOOL calculated;
#endif
/**
* Adds a buffer to the hash to be calculated.
*
* \param buf The buffer which should be included into the calculation.
* \param size The size of the buffer
*/
- (void)updateWithBuffer: (const char*)buf
ofSize: (size_t)size;
/**
* \return A buffer containing the hash. The size of the buffer is depending
* on the hash used. The buffer is part of object's memory pool.
*/
- (uint8_t*)digest;
/**
* \return A boolean whether the hash has already been calculated
*/
- (BOOL)calculated;
@end
/**
* \brief A class which provides functions to create an MD5 hash.
*/
@interface OFMD5Hash: OFHash
{
uint32_t buf[4];
uint32_t bits[2];
uint8_t in[64];
}
/**
* \return A new autoreleased MD5 Hash
*/
+ md5Hash;
@end
/**
* \brief A class which provides functions to create an SHA1 hash.
*/
@interface OFSHA1Hash: OFHash
{
uint32_t state[5];
uint64_t count;
char buffer[64];
uint8_t digest[OF_SHA1_DIGEST_SIZE];
}
/**
* \return A new autoreleased SHA1 Hash
*/
+ sha1Hash;
@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