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//
// RSADigestEngine.cpp
//
// Library: Crypto
// Package: RSA
// Module: RSADigestEngine
//
// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Crypto/RSADigestEngine.h"
#include <openssl/rsa.h>
namespace Poco {
namespace Crypto {
RSADigestEngine::RSADigestEngine(const RSAKey& key, DigestType digestType):
_key(key),
_engine(digestType == DIGEST_MD5 ? "MD5" : "SHA1")
{
}
RSADigestEngine::RSADigestEngine(const RSAKey& key, const std::string &name):
_key(key),
_engine(name)
{
}
RSADigestEngine::~RSADigestEngine()
{
}
std::size_t RSADigestEngine::digestLength() const
{
return _engine.digestLength();
}
void RSADigestEngine::reset()
{
_engine.reset();
_digest.clear();
_signature.clear();
}
const DigestEngine::Digest& RSADigestEngine::digest()
{
if (_digest.empty())
{
_digest = _engine.digest();
}
return _digest;
}
const DigestEngine::Digest& RSADigestEngine::signature()
{
if (_signature.empty())
{
digest();
_signature.resize(_key.size());
unsigned sigLen = static_cast<unsigned>(_signature.size());
RSA_sign(_engine.nid(), &_digest[0], static_cast<unsigned>(_digest.size()), &_signature[0], &sigLen, _key.impl()->getRSA());
// truncate _sig to sigLen
if (sigLen < _signature.size())
_signature.resize(sigLen);
}
return _signature;
}
bool RSADigestEngine::verify(const DigestEngine::Digest& sig)
{
digest();
DigestEngine::Digest sigCpy = sig; // copy becausse RSA_verify can modify sigCpy
int ret = RSA_verify(_engine.nid(), &_digest[0], static_cast<unsigned>(_digest.size()), &sigCpy[0], static_cast<unsigned>(sigCpy.size()), _key.impl()->getRSA());
return ret != 0;
}
void RSADigestEngine::updateImpl(const void* data, std::size_t length)
{
_engine.update(data, length);
}
} } // namespace Poco::Crypto
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