ported 1.4.4 branch changes (needs build checks and test runs!)

Crypto/src/DigestEngine.cpp

@@ -0,0 +1,93 @@
+//
+// DigestEngine.cpp
+//
+// $Id: //poco/1.4/Crypto/src/DigestEngine.cpp#1 $
+//
+// Library: Crypto
+// Package: Digest
+// Module:  DigestEngine
+//
+// Copyright (c) 2012, 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/DigestEngine.h"
+#include "Poco/Exception.h"
+
+
+namespace Poco {
+namespace Crypto {
+
+
+DigestEngine::DigestEngine(const std::string& name):
+	_name(name)
+{
+	const EVP_MD* md = EVP_get_digestbyname(_name.c_str());
+	if (!md) throw Poco::NotFoundException(_name);
+	_ctx = EVP_MD_CTX_create();
+	EVP_DigestInit_ex(_ctx, md, NULL);	
+}
+
+	
+DigestEngine::~DigestEngine()
+{
+	EVP_MD_CTX_destroy(_ctx);
+}
+
+
+unsigned DigestEngine::digestLength() const
+{
+	return EVP_MD_CTX_size(_ctx);
+}
+
+
+void DigestEngine::reset()
+{
+	EVP_MD_CTX_cleanup(_ctx);
+	const EVP_MD* md = EVP_get_digestbyname(_name.c_str());
+	if (!md) throw Poco::NotFoundException(_name);
+	EVP_DigestInit_ex(_ctx, md, NULL);
+}
+
+
+const Poco::DigestEngine::Digest& DigestEngine::digest()
+{
+	_digest.clear();
+	unsigned len = EVP_MD_CTX_size(_ctx);
+	_digest.resize(len);
+	EVP_DigestFinal_ex(_ctx, &_digest[0], &len);
+	reset();
+	return _digest;
+}
+
+
+void DigestEngine::updateImpl(const void* data, unsigned length)
+{
+	EVP_DigestUpdate(_ctx, data, length);
+}
+
+
+} } // namespace Poco::Crypto