1 files changed, 88 insertions, 0 deletions
diff --git a/src/mac/ssl3mac/ssl3_mac.cpp b/src/mac/ssl3mac/ssl3_mac.cpp
new file mode 100644
index 000000000..ceb04bf44
--- /dev/null
+++ b/src/mac/ssl3mac/ssl3_mac.cpp
@@ -0,0 +1,88 @@
+/*************************************************
+* SSL3-MAC Source File                           *
+* (C) 1999-2004 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/ssl3_mac.h>
+#include <botan/lookup.h>
+
+namespace Botan {
+
+/*************************************************
+* Update a SSL3-MAC Calculation                  *
+*************************************************/
+void SSL3_MAC::add_data(const byte input[], u32bit length)
+   {
+   hash->update(input, length);
+   }
+
+/*************************************************
+* Finalize a SSL3-MAC Calculation                *
+*************************************************/
+void SSL3_MAC::final_result(byte mac[])
+   {
+   hash->final(mac);
+   hash->update(o_key);
+   hash->update(mac, OUTPUT_LENGTH);
+   hash->final(mac);
+   hash->update(i_key);
+   }
+
+/*************************************************
+* SSL3-MAC Key Schedule                          *
+*************************************************/
+void SSL3_MAC::key(const byte key[], u32bit length)
+   {
+   hash->clear();
+   std::fill(i_key.begin(), i_key.end(), 0x36);
+   std::fill(o_key.begin(), o_key.end(), 0x5C);
+
+   i_key.copy(key, length);
+   o_key.copy(key, length);
+   hash->update(i_key);
+   }
+
+/*************************************************
+* Clear memory of sensitive data                 *
+*************************************************/
+void SSL3_MAC::clear() throw()
+   {
+   hash->clear();
+   i_key.clear();
+   o_key.clear();
+   }
+
+/*************************************************
+* Return the name of this type                   *
+*************************************************/
+std::string SSL3_MAC::name() const
+   {
+   return "SSL3-MAC(" + hash->name() + ")";
+   }
+
+/*************************************************
+* Return a clone of this object                  *
+*************************************************/
+MessageAuthenticationCode* SSL3_MAC::clone() const
+   {
+   return new SSL3_MAC(hash->name());
+   }
+
+/*************************************************
+* SSL3-MAC Constructor                           *
+*************************************************/
+SSL3_MAC::SSL3_MAC(const std::string& hash_name) :
+   MessageAuthenticationCode(output_length_of(hash_name),
+                             output_length_of(hash_name)),
+   hash(get_hash(hash_name))
+   {
+   if(hash->name() != "MD5" && hash->name() != "SHA-160")
+      throw Invalid_Argument("SSL3-MAC cannot be used with " + hash->name());
+
+   const u32bit INNER_HASH_LENGTH = (hash->name() == "MD5") ? 64 : 60;
+
+   i_key.create(INNER_HASH_LENGTH);
+   o_key.create(INNER_HASH_LENGTH);
+   }
+
+}