Add modebase module (and add dep in cipher mode impls). Move data_snk.cpp to filters

1 files changed, 53 insertions, 0 deletions

diff --git a/src/modes/modebase/modebase.cpp b/src/modes/modebase/modebase.cpp
new file mode 100644
index 000000000..6661d9f33
--- /dev/null
+++ b/src/modes/modebase/modebase.cpp
@@ -0,0 +1,53 @@
+/*************************************************
+* Block Cipher Mode Source File                  *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/modebase.h>
+#include <botan/lookup.h>
+
+namespace Botan {
+
+/*************************************************
+* Block Cipher Mode Constructor                  *
+*************************************************/
+BlockCipherMode::BlockCipherMode(const std::string& cipher_name,
+                                 const std::string& cipher_mode_name,
+                                 u32bit iv_size, u32bit iv_meth,
+                                 u32bit buf_mult) :
+   BLOCK_SIZE(block_size_of(cipher_name)), BUFFER_SIZE(buf_mult * BLOCK_SIZE),
+   IV_METHOD(iv_meth), mode_name(cipher_mode_name)
+   {
+   base_ptr = cipher = get_block_cipher(cipher_name);
+   buffer.create(BUFFER_SIZE);
+   state.create(iv_size);
+   position = 0;
+   }
+
+/*************************************************
+* Return the name of this type                   *
+*************************************************/
+std::string BlockCipherMode::name() const
+   {
+   return (cipher->name() + "/" + mode_name);
+   }
+
+/*************************************************
+* Set the IV                                     *
+*************************************************/
+void BlockCipherMode::set_iv(const InitializationVector& new_iv)
+   {
+   if(new_iv.length() != state.size())
+      throw Invalid_IV_Length(name(), new_iv.length());
+
+   state = new_iv.bits_of();
+   buffer.clear();
+   position = 0;
+
+   if(IV_METHOD == 1)
+      cipher->encrypt(state, buffer);
+   else if(IV_METHOD == 2)
+      cipher->encrypt(state);
+   }
+
+}