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/*
* EMSA4
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_EMSA4_H__
#define BOTAN_EMSA4_H__
#include <botan/emsa.h>
#include <botan/hash.h>
#include <memory>
namespace Botan {
/**
* EMSA4 aka PSS-R
*/
class BOTAN_DLL EMSA4 : public EMSA
{
public:
/**
* @param hash the hash object to use
*/
EMSA4(HashFunction* hash);
/**
* @param hash the hash object to use
* @param salt_size the size of the salt to use in bytes
*/
EMSA4(HashFunction* hash, size_t salt_size);
private:
void update(const byte input[], size_t length);
secure_vector<byte> raw_data();
secure_vector<byte> encoding_of(const secure_vector<byte>& msg,
size_t output_bits,
RandomNumberGenerator& rng);
bool verify(const secure_vector<byte>& coded,
const secure_vector<byte>& raw,
size_t key_bits);
size_t SALT_SIZE;
std::unique_ptr<HashFunction> hash;
};
}
#endif
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