1 files changed, 107 insertions, 0 deletions
diff --git a/old/botan/src/mac/x919_mac/x919_mac.cpp b/old/botan/src/mac/x919_mac/x919_mac.cpp
new file mode 100644
index 0000000..ef89cac
--- /dev/null
+++ b/old/botan/src/mac/x919_mac/x919_mac.cpp
@@ -0,0 +1,107 @@
+/*
+* ANSI X9.19 MAC
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/x919_mac.h>
+#include <botan/xor_buf.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*
+* Update an ANSI X9.19 MAC Calculation
+*/
+void ANSI_X919_MAC::add_data(const byte input[], u32bit length)
+   {
+   u32bit xored = std::min(8 - position, length);
+   xor_buf(state + position, input, xored);
+   position += xored;
+
+   if(position < 8) return;
+
+   e->encrypt(state);
+   input += xored;
+   length -= xored;
+   while(length >= 8)
+      {
+      xor_buf(state, input, 8);
+      e->encrypt(state);
+      input += 8;
+      length -= 8;
+      }
+
+   xor_buf(state, input, length);
+   position = length;
+   }
+
+/*
+* Finalize an ANSI X9.19 MAC Calculation
+*/
+void ANSI_X919_MAC::final_result(byte mac[])
+   {
+   if(position)
+      e->encrypt(state);
+   d->decrypt(state, mac);
+   e->encrypt(mac);
+   state.clear();
+   position = 0;
+   }
+
+/*
+* ANSI X9.19 MAC Key Schedule
+*/
+void ANSI_X919_MAC::key_schedule(const byte key[], u32bit length)
+   {
+   e->set_key(key, 8);
+   if(length == 8) d->set_key(key, 8);
+   else            d->set_key(key + 8, 8);
+   }
+
+/*
+* Clear memory of sensitive data
+*/
+void ANSI_X919_MAC::clear() throw()
+   {
+   e->clear();
+   d->clear();
+   state.clear();
+   position = 0;
+   }
+
+std::string ANSI_X919_MAC::name() const
+   {
+   return "X9.19-MAC";
+   }
+
+MessageAuthenticationCode* ANSI_X919_MAC::clone() const
+   {
+   return new ANSI_X919_MAC(e->clone());
+   }
+
+/*
+* ANSI X9.19 MAC Constructor
+*/
+ANSI_X919_MAC::ANSI_X919_MAC(BlockCipher* e_in) :
+   MessageAuthenticationCode(e_in->BLOCK_SIZE,
+                             e_in->MINIMUM_KEYLENGTH,
+                             2*e_in->MAXIMUM_KEYLENGTH,
+                             2*e_in->KEYLENGTH_MULTIPLE),
+   e(e_in), d(e->clone()), position(0)
+   {
+   if(e->name() != "DES")
+      throw Invalid_Argument("ANSI X9.19 MAC only supports DES");
+   }
+
+/*
+* ANSI X9.19 MAC Destructor
+le*/
+ANSI_X919_MAC::~ANSI_X919_MAC()
+   {
+   delete e;
+   delete d;
+   }
+
+}