new trunk (base for 1.5)

windows build only

Crypto/include/Poco/Crypto/CryptoTransform.h

@@ -0,0 +1,92 @@
+//
+// CryptoTransform.h
+//
+// $Id: //poco/1.4/Crypto/include/Poco/Crypto/CryptoTransform.h#1 $
+//
+// Library: Crypto
+// Package: Cipher
+// Module:  CryptoTransform
+//
+// Definition of the CryptoTransform class.
+//
+// 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.
+//
+
+
+#ifndef Crypto_CryptoTransform_INCLUDED
+#define Crypto_CryptoTransform_INCLUDED
+
+
+#include "Poco/Crypto/Crypto.h"
+#include <ios>
+
+
+namespace Poco {
+namespace Crypto {
+
+
+class Crypto_API CryptoTransform
+	/// This interface represents the basic operations for cryptographic
+	/// transformations to be used with a CryptoInputStream or a
+	/// CryptoOutputStream.
+	///
+	/// Implementations of this class are returned by the Cipher class to
+	/// perform encryption or decryption of data.
+{
+public:
+	CryptoTransform();
+		/// Creates a new CryptoTransform object.
+
+	virtual ~CryptoTransform();
+		/// Destroys the CryptoTransform.
+
+	virtual std::size_t blockSize() const = 0;
+		/// Returns the block size for this CryptoTransform.
+
+	virtual std::streamsize transform(
+		const unsigned char* input,
+		std::streamsize		 inputLength,
+		unsigned char*		 output,
+		std::streamsize		 outputLength) = 0;
+		/// Transforms a chunk of data. The inputLength is arbitrary and does not
+		/// need to be a multiple of the block size. The output buffer has a maximum
+		/// capacity of the given outputLength that must be at least
+		///   inputLength + blockSize() - 1
+		/// Returns the number of bytes written to the output buffer.
+
+	virtual std::streamsize finalize(unsigned char* output, std::streamsize length) = 0;
+		/// Finalizes the transformation. The output buffer must contain enough
+		/// space for at least two blocks, ie.
+		///   length >= 2*blockSize()
+		/// must be true.  Returns the number of bytes written to the output
+		/// buffer.
+};
+
+
+} } // namespace Poco::Crypto
+
+
+#endif // Crypto_CryptoTransform_INCLUDED