copied Crypto from sandbox to trunk

Crypto/src/RSADigestEngine.cpp

@@ -0,0 +1,106 @@
+//
+// RSADigestEngine.cpp
+//
+// $Id: //poco/Main/Crypto/src/RSADigestEngine.cpp#2 $
+//
+// Library: Crypto
+// Package: CryptoCore
+// Module:  RSADigestEngine
+//
+// Copyright (c) 2008, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// 
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+
+#include "Poco/Crypto/RSADigestEngine.h"
+#include <openssl/pem.h>
+
+
+namespace Poco {
+namespace Crypto {
+
+
+RSADigestEngine::RSADigestEngine(const RSAKey& key):
+	_key(key),
+	_sig(),
+	_sha1()
+{
+	_sig = DigestEngine::Digest(key.size());
+}
+
+
+RSADigestEngine::~RSADigestEngine()
+{
+}
+
+
+unsigned RSADigestEngine::digestLength() const
+{
+	return _sha1.digestLength();
+}
+
+
+void RSADigestEngine::reset()
+{
+	_sha1.reset();
+	_sig = DigestEngine::Digest(_key.size());
+}
+
+	
+const DigestEngine::Digest& RSADigestEngine::digest()
+{
+	return _sha1.digest();
+}
+
+
+const DigestEngine::Digest& RSADigestEngine::signature()
+{
+	const DigestEngine::Digest& digest = _sha1.digest();
+	unsigned int sigLen = _sig.size();
+	RSA_sign(NID_sha1, &digest[0], (unsigned int)digest.size(), &_sig[0], &sigLen, _key.impl()->getRSA());
+	// truncate _sig to sigLen
+	if (sigLen < _sig.size())
+		_sig.resize(sigLen);
+    return _sig;
+}
+
+	
+void RSADigestEngine::verify(const DigestEngine::Digest& sig)
+{
+	const DigestEngine::Digest& digest = _sha1.digest();
+	DigestEngine::Digest sigCpy = sig; // copy becausse RSA_verify can modify sigCpy
+	int ret = RSA_verify(NID_sha1, &digest[0], (unsigned int)digest.size(), &sigCpy[0], (unsigned int)sigCpy.size(), _key.impl()->getRSA());
+	if (ret == 0)
+		throw Poco::DataFormatException("Signature does not match");
+}
+
+
+void RSADigestEngine::updateImpl(const void* data, unsigned length)
+{
+	_sha1.update(data, length);
+}
+
+
+} } // namespace Poco::Crypto