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/*
* EMSA1
* (C) 1999-2007 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_EMSA1_H__
#define BOTAN_EMSA1_H__
#include <botan/emsa.h>
#include <botan/hash.h>
namespace Botan {
/**
* EMSA1 from IEEE 1363
* Essentially, sign the hash directly
*/
class BOTAN_DLL EMSA1 : public EMSA
{
public:
/**
* @param hash the hash function to use
*/
EMSA1(HashFunction* hash) : m_hash(hash) {}
protected:
size_t hash_output_length() const { return m_hash->output_length(); }
private:
void update(const byte[], size_t);
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);
std::unique_ptr<HashFunction> m_hash;
};
}
#endif
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