1 files changed, 54 insertions, 0 deletions
diff --git a/botan/src/modes/modebase.cpp b/botan/src/modes/modebase.cpp
new file mode 100644
index 0000000..8293acc
--- /dev/null
+++ b/botan/src/modes/modebase.cpp
@@ -0,0 +1,54 @@
+/*
+* Block Cipher Mode
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/modebase.h>
+
+namespace Botan {
+
+/*
+* Block Cipher Mode Constructor
+*/
+BlockCipherMode::BlockCipherMode(BlockCipher* cipher_ptr,
+                                 const std::string& cipher_mode_name,
+                                 u32bit iv_size, u32bit iv_meth,
+                                 u32bit buf_mult) :
+   BLOCK_SIZE(cipher_ptr->BLOCK_SIZE), BUFFER_SIZE(buf_mult * BLOCK_SIZE),
+   IV_METHOD(iv_meth), mode_name(cipher_mode_name)
+   {
+   base_ptr = cipher = cipher_ptr;
+   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);
+   }
+
+}