1 files changed, 99 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/mac/cbc_mac/cbc_mac.cpp b/comm/third_party/botan/src/lib/mac/cbc_mac/cbc_mac.cpp
new file mode 100644
index 0000000000..ba403b564a
--- /dev/null
+++ b/comm/third_party/botan/src/lib/mac/cbc_mac/cbc_mac.cpp
@@ -0,0 +1,99 @@
+/*
+* CBC-MAC
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#include <botan/cbc_mac.h>
+
+namespace Botan {
+
+/*
+* Update an CBC-MAC Calculation
+*/
+void CBC_MAC::add_data(const uint8_t input[], size_t length)
+   {
+   verify_key_set(m_state.empty() == false);
+
+   size_t xored = std::min(output_length() - m_position, length);
+   xor_buf(&m_state[m_position], input, xored);
+   m_position += xored;
+
+   if(m_position < output_length())
+      return;
+
+   m_cipher->encrypt(m_state);
+   input += xored;
+   length -= xored;
+   while(length >= output_length())
+      {
+      xor_buf(m_state, input, output_length());
+      m_cipher->encrypt(m_state);
+      input += output_length();
+      length -= output_length();
+      }
+
+   xor_buf(m_state, input, length);
+   m_position = length;
+   }
+
+/*
+* Finalize an CBC-MAC Calculation
+*/
+void CBC_MAC::final_result(uint8_t mac[])
+   {
+   verify_key_set(m_state.empty() == false);
+
+   if(m_position)
+      m_cipher->encrypt(m_state);
+
+   copy_mem(mac, m_state.data(), m_state.size());
+   zeroise(m_state);
+   m_position = 0;
+   }
+
+/*
+* CBC-MAC Key Schedule
+*/
+void CBC_MAC::key_schedule(const uint8_t key[], size_t length)
+   {
+   m_state.resize(m_cipher->block_size());
+   m_cipher->set_key(key, length);
+   }
+
+/*
+* Clear memory of sensitive data
+*/
+void CBC_MAC::clear()
+   {
+   m_cipher->clear();
+   zap(m_state);
+   m_position = 0;
+   }
+
+/*
+* Return the name of this type
+*/
+std::string CBC_MAC::name() const
+   {
+   return "CBC-MAC(" + m_cipher->name() + ")";
+   }
+
+/*
+* Return a clone of this object
+*/
+MessageAuthenticationCode* CBC_MAC::clone() const
+   {
+   return new CBC_MAC(m_cipher->clone());
+   }
+
+/*
+* CBC-MAC Constructor
+*/
+CBC_MAC::CBC_MAC(BlockCipher* cipher) :
+   m_cipher(cipher)
+   {
+   }
+
+}