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