Modularize cipher modes

1 files changed, 0 insertions, 194 deletions

diff --git a/src/eax.cpp b/src/eax.cpp
deleted file mode 100644
index f246a9dea..000000000
--- a/src/eax.cpp
+++ /dev/null
@@ -1,194 +0,0 @@
-/*************************************************
-* EAX Mode Encryption Source File                *
-* (C) 1999-2007 Jack Lloyd                       *
-*************************************************/
-
-#include <botan/eax.h>
-#include <botan/lookup.h>
-#include <botan/xor_buf.h>
-#include <botan/parsing.h>
-#include <algorithm>
-
-namespace Botan {
-
-namespace {
-
-/*************************************************
-* EAX MAC-based PRF                              *
-*************************************************/
-SecureVector<byte> eax_prf(byte tag, u32bit BLOCK_SIZE,
-                           MessageAuthenticationCode* mac,
-                           const byte in[], u32bit length)
-   {
-   for(u32bit j = 0; j != BLOCK_SIZE - 1; ++j)
-      mac->update(0);
-   mac->update(tag);
-   mac->update(in, length);
-   return mac->final();
-   }
-
-}
-
-/*************************************************
-* EAX_Base Constructor                           *
-*************************************************/
-EAX_Base::EAX_Base(const std::string& cipher_name,
-                   u32bit tag_size) :
-   TAG_SIZE(tag_size ? tag_size / 8 : block_size_of(cipher_name)),
-   BLOCK_SIZE(block_size_of(cipher_name))
-   {
-   const std::string mac_name = "CMAC(" + cipher_name + ")";
-
-   cipher = get_block_cipher(cipher_name);
-   mac = get_mac(mac_name);
-
-   if(tag_size % 8 != 0 || TAG_SIZE == 0 || TAG_SIZE > mac->OUTPUT_LENGTH)
-      throw Invalid_Argument(name() + ": Bad tag size " + to_string(tag_size));
-
-   state.create(BLOCK_SIZE);
-   buffer.create(BLOCK_SIZE);
-   position = 0;
-   }
-
-/*************************************************
-* Check if a keylength is valid for EAX          *
-*************************************************/
-bool EAX_Base::valid_keylength(u32bit n) const
-   {
-   if(!cipher->valid_keylength(n))
-      return false;
-   if(!mac->valid_keylength(n))
-      return false;
-   return true;
-   }
-
-/*************************************************
-* Set the EAX key                                *
-*************************************************/
-void EAX_Base::set_key(const SymmetricKey& key)
-   {
-   cipher->set_key(key);
-   mac->set_key(key);
-   header_mac = eax_prf(1, BLOCK_SIZE, mac, 0, 0);
-   }
-
-/*************************************************
-* Do setup at the start of each message          *
-*************************************************/
-void EAX_Base::start_msg()
-   {
-   for(u32bit j = 0; j != BLOCK_SIZE - 1; ++j)
-      mac->update(0);
-   mac->update(2);
-   }
-
-/*************************************************
-* Set the EAX nonce                              *
-*************************************************/
-void EAX_Base::set_iv(const InitializationVector& iv)
-   {
-   nonce_mac = eax_prf(0, BLOCK_SIZE, mac, iv.begin(), iv.length());
-   state = nonce_mac;
-   cipher->encrypt(state, buffer);
-   }
-
-/*************************************************
-* Set the EAX header                             *
-*************************************************/
-void EAX_Base::set_header(const byte header[], u32bit length)
-   {
-   header_mac = eax_prf(1, BLOCK_SIZE, mac, header, length);
-   }
-
-/*************************************************
-* Return the name of this cipher mode            *
-*************************************************/
-std::string EAX_Base::name() const
-   {
-   return (cipher->name() + "/EAX");
-   }
-
-/*************************************************
-* Increment the counter and update the buffer    *
-*************************************************/
-void EAX_Base::increment_counter()
-   {
-   for(s32bit j = BLOCK_SIZE - 1; j >= 0; --j)
-      if(++state[j])
-         break;
-   cipher->encrypt(state, buffer);
-   position = 0;
-   }
-
-/*************************************************
-* EAX_Encryption Constructor                     *
-*************************************************/
-EAX_Encryption::EAX_Encryption(const std::string& cipher_name,
-                               u32bit tag_size) :
-   EAX_Base(cipher_name, tag_size)
-   {
-   }
-
-/*************************************************
-* EAX_Encryption Constructor                     *
-*************************************************/
-EAX_Encryption::EAX_Encryption(const std::string& cipher_name,
-                               const SymmetricKey& key,
-                               const InitializationVector& iv,
-                               u32bit tag_size) :
-   EAX_Base(cipher_name, tag_size)
-   {
-   set_key(key);
-   set_iv(iv);
-   }
-
-/*************************************************
-* Encrypt in EAX mode                            *
-*************************************************/
-void EAX_Encryption::write(const byte input[], u32bit length)
-   {
-   u32bit copied = std::min(BLOCK_SIZE - position, length);
-   xor_buf(buffer + position, input, copied);
-   send(buffer + position, copied);
-   mac->update(buffer + position, copied);
-   input += copied;
-   length -= copied;
-   position += copied;
-
-   if(position == BLOCK_SIZE)
-      increment_counter();
-
-   while(length >= BLOCK_SIZE)
-      {
-      xor_buf(buffer, input, BLOCK_SIZE);
-      send(buffer, BLOCK_SIZE);
-      mac->update(buffer, BLOCK_SIZE);
-
-      input += BLOCK_SIZE;
-      length -= BLOCK_SIZE;
-      increment_counter();
-      }
-
-   xor_buf(buffer + position, input, length);
-   send(buffer + position, length);
-   mac->update(buffer + position, length);
-   position += length;
-   }
-
-/*************************************************
-* Finish encrypting in EAX mode                  *
-*************************************************/
-void EAX_Encryption::end_msg()
-   {
-   SecureVector<byte> data_mac = mac->final();
-   xor_buf(data_mac, nonce_mac, data_mac.size());
-   xor_buf(data_mac, header_mac, data_mac.size());
-
-   send(data_mac, TAG_SIZE);
-
-   state.clear();
-   buffer.clear();
-   position = 0;
-   }
-
-}