1 files changed, 162 insertions, 0 deletions
diff --git a/src/lib/block/block_cipher.h b/src/lib/block/block_cipher.h
new file mode 100644
index 000000000..5cbd6bdae
--- /dev/null
+++ b/src/lib/block/block_cipher.h
@@ -0,0 +1,162 @@
+/*
+* Block Cipher Base Class
+* (C) 1999-2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_BLOCK_CIPHER_H__
+#define BOTAN_BLOCK_CIPHER_H__
+
+#include <botan/sym_algo.h>
+
+namespace Botan {
+
+/**
+* This class represents a block cipher object.
+*/
+class BOTAN_DLL BlockCipher : public SymmetricAlgorithm
+   {
+   public:
+
+      /**
+      * @return block size of this algorithm
+      */
+      virtual size_t block_size() const = 0;
+
+      /**
+      * @return native parallelism of this cipher in blocks
+      */
+      virtual size_t parallelism() const { return 1; }
+
+      /**
+      * @return prefererred parallelism of this cipher in bytes
+      */
+      size_t parallel_bytes() const
+         {
+         return parallelism() * block_size() * BOTAN_BLOCK_CIPHER_PAR_MULT;
+         }
+
+      /**
+      * Encrypt a block.
+      * @param in The plaintext block to be encrypted as a byte array.
+      * Must be of length block_size().
+      * @param out The byte array designated to hold the encrypted block.
+      * Must be of length block_size().
+      */
+      void encrypt(const byte in[], byte out[]) const
+         { encrypt_n(in, out, 1); }
+
+      /**
+      * Decrypt a block.
+      * @param in The ciphertext block to be decypted as a byte array.
+      * Must be of length block_size().
+      * @param out The byte array designated to hold the decrypted block.
+      * Must be of length block_size().
+      */
+      void decrypt(const byte in[], byte out[]) const
+         { decrypt_n(in, out, 1); }
+
+      /**
+      * Encrypt a block.
+      * @param block the plaintext block to be encrypted
+      * Must be of length block_size(). Will hold the result when the function
+      * has finished.
+      */
+      void encrypt(byte block[]) const { encrypt_n(block, block, 1); }
+
+      /**
+      * Decrypt a block.
+      * @param block the ciphertext block to be decrypted
+      * Must be of length block_size(). Will hold the result when the function
+      * has finished.
+      */
+      void decrypt(byte block[]) const { decrypt_n(block, block, 1); }
+
+      /**
+      * Encrypt one or more blocks
+      * @param block the input/output buffer (multiple of block_size())
+      */
+      template<typename Alloc>
+      void encrypt(std::vector<byte, Alloc>& block) const
+         {
+         return encrypt_n(&block[0], &block[0], block.size() / block_size());
+         }
+
+      /**
+      * Decrypt one or more blocks
+      * @param block the input/output buffer (multiple of block_size())
+      */
+      template<typename Alloc>
+      void decrypt(std::vector<byte, Alloc>& block) const
+         {
+         return decrypt_n(&block[0], &block[0], block.size() / block_size());
+         }
+
+      /**
+      * Encrypt one or more blocks
+      * @param in the input buffer (multiple of block_size())
+      * @param out the output buffer (same size as in)
+      */
+      template<typename Alloc, typename Alloc2>
+      void encrypt(const std::vector<byte, Alloc>& in,
+                   std::vector<byte, Alloc2>& out) const
+         {
+         return encrypt_n(&in[0], &out[0], in.size() / block_size());
+         }
+
+      /**
+      * Decrypt one or more blocks
+      * @param in the input buffer (multiple of block_size())
+      * @param out the output buffer (same size as in)
+      */
+      template<typename Alloc, typename Alloc2>
+      void decrypt(const std::vector<byte, Alloc>& in,
+                   std::vector<byte, Alloc2>& out) const
+         {
+         return decrypt_n(&in[0], &out[0], in.size() / block_size());
+         }
+
+      /**
+      * Encrypt one or more blocks
+      * @param in the input buffer (multiple of block_size())
+      * @param out the output buffer (same size as in)
+      * @param blocks the number of blocks to process
+      */
+      virtual void encrypt_n(const byte in[], byte out[],
+                             size_t blocks) const = 0;
+
+      /**
+      * Decrypt one or more blocks
+      * @param in the input buffer (multiple of block_size())
+      * @param out the output buffer (same size as in)
+      * @param blocks the number of blocks to process
+      */
+      virtual void decrypt_n(const byte in[], byte out[],
+                             size_t blocks) const = 0;
+
+      /**
+      * @return new object representing the same algorithm as *this
+      */
+      virtual BlockCipher* clone() const = 0;
+   };
+
+/**
+* Represents a block cipher with a single fixed block size
+*/
+template<size_t BS, size_t KMIN, size_t KMAX = 0, size_t KMOD = 1>
+class Block_Cipher_Fixed_Params : public BlockCipher
+   {
+   public:
+      enum { BLOCK_SIZE = BS };
+      size_t block_size() const { return BS; }
+
+      Key_Length_Specification key_spec() const
+         {
+         return Key_Length_Specification(KMIN, KMAX, KMOD);
+         }
+   };
+
+}
+
+#endif