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//
// ECDSADigestEngine.cpp
//
//
// Library: Crypto
// Package: ECDSA
// Module: ECDSADigestEngine
//
// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Crypto/ECDSADigestEngine.h"
#include <openssl/ecdsa.h>
namespace Poco {
namespace Crypto {
ECDSADigestEngine::ECDSADigestEngine(const ECKey& key, const std::string &name):
_key(key),
_engine(name)
{
}
ECDSADigestEngine::~ECDSADigestEngine()
{
}
std::size_t ECDSADigestEngine::digestLength() const
{
return _engine.digestLength();
}
void ECDSADigestEngine::reset()
{
_engine.reset();
_digest.clear();
_signature.clear();
}
const DigestEngine::Digest& ECDSADigestEngine::digest()
{
if (_digest.empty())
{
_digest = _engine.digest();
}
return _digest;
}
const DigestEngine::Digest& ECDSADigestEngine::signature()
{
if (_signature.empty())
{
digest();
_signature.resize(_key.size());
unsigned sigLen = static_cast<unsigned>(_signature.size());
if (!ECDSA_sign(0, &_digest[0], static_cast<unsigned>(_digest.size()),
&_signature[0], &sigLen, _key.impl()->getECKey()))
{
throw OpenSSLException();
}
if (sigLen < _signature.size()) _signature.resize(sigLen);
}
return _signature;
}
bool ECDSADigestEngine::verify(const DigestEngine::Digest& sig)
{
digest();
EC_KEY* pKey = _key.impl()->getECKey();
if (pKey)
{
int ret = ECDSA_verify(0, &_digest[0], static_cast<unsigned>(_digest.size()),
&sig[0], static_cast<unsigned>(sig.size()),
pKey);
if (1 == ret) return true;
else if (0 == ret) return false;
}
throw OpenSSLException();
}
void ECDSADigestEngine::updateImpl(const void* data, std::size_t length)
{
_engine.update(data, length);
}
} } // namespace Poco::Crypto
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