security: Add BlockCipher in transformation
Change-Id: I2c09509acd69e7f9270ef8c9b6e5e16ede2a8042
Refs: #3009
diff --git a/src/security/transform/block-cipher.hpp b/src/security/transform/block-cipher.hpp
new file mode 100644
index 0000000..dd67858
--- /dev/null
+++ b/src/security/transform/block-cipher.hpp
@@ -0,0 +1,109 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2016 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ */
+
+#ifndef NDN_CXX_SECURITY_TRANSFORM_BLOCK_CIPHER_HPP
+#define NDN_CXX_SECURITY_TRANSFORM_BLOCK_CIPHER_HPP
+
+#include "transform-base.hpp"
+#include "../security-common.hpp"
+
+namespace ndn {
+namespace security {
+namespace transform {
+
+/**
+ * @brief The module to encrypt data using block cipher.
+ *
+ * The padding scheme of the block cipher is set to the default padding scheme of OpenSSl,
+ * which is PKCS padding.
+ */
+class BlockCipher : public Transform
+{
+public:
+ /**
+ * @brief Create a block cipher
+ *
+ * @param algo The block cipher algorithm (e.g., EncryptMode::AES_CBC).
+ * @param op The operation that the cipher needs to perform, e.g., CipherOperator::ENCRYPT or CipherOperator::DECRYPT
+ * @param key The pointer to the key.
+ * @param keyLen The size of the key.
+ * @param iv The pointer to the initial vector.
+ * @param ivLen The length of the initial vector.
+ */
+ BlockCipher(BlockCipherAlgorithm algo, CipherOperator op,
+ const uint8_t* key, size_t keyLen,
+ const uint8_t* iv, size_t ivLen);
+
+private:
+ /**
+ * @brief Read partial transformation result (if exists) from BIO
+ */
+ virtual void
+ preTransform() final;
+
+ /**
+ * @brief Write @p data into the cipher
+ *
+ * @return number of bytes that are actually accepted
+ */
+ virtual size_t
+ convert(const uint8_t* data, size_t dataLen) final;
+
+ /**
+ * @brief Finalize the encryption
+ */
+ virtual void
+ finalize() final;
+
+ /**
+ * @brief Fill output buffer with the encryption result from BIO.
+ */
+ void
+ fillOutputBuffer();
+
+ /**
+ * @return true if the cipher does not have partial result.
+ */
+ bool
+ isConverterEmpty() const;
+
+private:
+
+ void
+ initializeAesCbc(const uint8_t* key, size_t keyLen,
+ const uint8_t* iv, size_t ivLen,
+ CipherOperator op);
+
+private:
+ class Impl;
+ unique_ptr<Impl> m_impl;
+};
+
+unique_ptr<Transform>
+blockCipher(BlockCipherAlgorithm algo, CipherOperator op,
+ const uint8_t* key, size_t keyLen,
+ const uint8_t* iv, size_t ivLen);
+
+} // namespace transform
+} // namespace security
+} // namespace ndn
+
+#endif // NDN_CXX_SECURITY_TRANSFORM_BLOCK_CIPHER_HPP