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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2010 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#ifndef __HASH_H__
#define __HASH_H__
#include "modules.h"
#define SHA256_DIGEST_SIZE (256 / 8)
#define SHA256_BLOCK_SIZE (512 / 8)
class HashProvider : public DataProvider
{
public:
HashProvider(Module* mod, const std::string& Name) : DataProvider(mod, Name) {}
virtual std::string sum(const std::string& data) = 0;
inline std::string hexsum(const std::string& data)
{
return BinToHex(sum(data));
}
inline std::string b64sum(const std::string& data)
{
return BinToBase64(sum(data), NULL, 0);
}
/** Allows the IVs for the hash to be specified. As the choice of initial IV is
* important for the security of a hash, this should not be used except to
* maintain backwards compatability. This also allows you to change the hex
* sequence from its default of "0123456789abcdef", which does not improve the
* strength of the output, but helps confuse those attempting to implement it.
*
* Example:
* \code
* unsigned int iv[] = { 0xFFFFFFFF, 0x00000000, 0xAAAAAAAA, 0xCCCCCCCC };
* std::string result = Hash.sumIV(iv, "fedcba9876543210", "data");
* \endcode
*/
virtual std::string sumIV(unsigned int* IV, const char* HexMap, const std::string &sdata) = 0;
};
#endif
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