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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_PUBLIC_API(2,0) EMSA1 final : public EMSA
{
public:
/**
* @param hash the hash function to use
*/
explicit EMSA1(HashFunction* hash) : m_hash(hash) {}
EMSA* clone() override;
virtual std::string name() const override
{ return "EMSA1(" + m_hash->name() + ")"; };
AlgorithmIdentifier config_for_x509(const Private_Key& key,
const std::string& cert_hash_name) const override;
private:
size_t hash_output_length() const { return m_hash->output_length(); }
void update(const uint8_t[], size_t) override;
secure_vector<uint8_t> raw_data() override;
secure_vector<uint8_t> encoding_of(const secure_vector<uint8_t>& msg,
size_t output_bits,
RandomNumberGenerator& rng) override;
bool verify(const secure_vector<uint8_t>& coded,
const secure_vector<uint8_t>& raw,
size_t key_bits) override;
std::unique_ptr<HashFunction> m_hash;
};
}
#endif
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