diff options
Diffstat (limited to 'old/botan/src/modes/modebase.cpp')
-rw-r--r-- | old/botan/src/modes/modebase.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/old/botan/src/modes/modebase.cpp b/old/botan/src/modes/modebase.cpp new file mode 100644 index 0000000..8293acc --- /dev/null +++ b/old/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); + } + +} |