1 files changed, 99 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/mac/x919_mac/x919_mac.cpp b/comm/third_party/botan/src/lib/mac/x919_mac/x919_mac.cpp
new file mode 100644
index 0000000000..0cbf087959
--- /dev/null
+++ b/comm/third_party/botan/src/lib/mac/x919_mac/x919_mac.cpp
@@ -0,0 +1,99 @@
+/*
+* ANSI X9.19 MAC
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/x919_mac.h>
+
+namespace Botan {
+
+/*
+* Update an ANSI X9.19 MAC Calculation
+*/
+void ANSI_X919_MAC::add_data(const uint8_t input[], size_t length)
+   {
+   verify_key_set(m_state.empty() == false);
+
+   size_t xored = std::min(8 - m_position, length);
+   xor_buf(&m_state[m_position], input, xored);
+   m_position += xored;
+
+   if(m_position < 8) return;
+
+   m_des1->encrypt(m_state);
+   input += xored;
+   length -= xored;
+   while(length >= 8)
+      {
+      xor_buf(m_state, input, 8);
+      m_des1->encrypt(m_state);
+      input += 8;
+      length -= 8;
+      }
+
+   xor_buf(m_state, input, length);
+   m_position = length;
+   }
+
+/*
+* Finalize an ANSI X9.19 MAC Calculation
+*/
+void ANSI_X919_MAC::final_result(uint8_t mac[])
+   {
+   if(m_position)
+      m_des1->encrypt(m_state);
+   m_des2->decrypt(m_state.data(), mac);
+   m_des1->encrypt(mac);
+   zeroise(m_state);
+   m_position = 0;
+   }
+
+/*
+* ANSI X9.19 MAC Key Schedule
+*/
+void ANSI_X919_MAC::key_schedule(const uint8_t key[], size_t length)
+   {
+   m_state.resize(8);
+
+   m_des1->set_key(key, 8);
+
+   if(length == 16)
+      key += 8;
+
+   m_des2->set_key(key, 8);
+   }
+
+/*
+* Clear memory of sensitive data
+*/
+void ANSI_X919_MAC::clear()
+   {
+   m_des1->clear();
+   m_des2->clear();
+   zap(m_state);
+   m_position = 0;
+   }
+
+std::string ANSI_X919_MAC::name() const
+   {
+   return "X9.19-MAC";
+   }
+
+MessageAuthenticationCode* ANSI_X919_MAC::clone() const
+   {
+   return new ANSI_X919_MAC;
+   }
+
+/*
+* ANSI X9.19 MAC Constructor
+*/
+ANSI_X919_MAC::ANSI_X919_MAC() :
+   m_des1(BlockCipher::create("DES")),
+   m_des2(m_des1->clone()),
+   m_position(0)
+   {
+   }
+
+}