tls_handshake_hash.cpp

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/*
* TLS Handshake Hash
* (C) 2004-2006 Jack Lloyd
*
* Released under the terms of the Botan license
*/
 
#include <botan/internal/tls_handshake_hash.h>
#include <botan/md5.h>
#include <botan/sha160.h>
#include <memory>
 
namespace Botan {
 
/**
* Return a TLS Handshake Hash
*/
SecureVector<byte> HandshakeHash::final()
   {
   MD5 md5;
   SHA_160 sha1;
 
   md5.update(data);
   sha1.update(data);
 
   SecureVector<byte> output;
   output += md5.final();
   output += sha1.final();
   return output;
   }
 
/**
* Return a SSLv3 Handshake Hash
*/
SecureVector<byte> HandshakeHash::final_ssl3(const MemoryRegion<byte>& secret)
   {
   const byte PAD_INNER = 0x36, PAD_OUTER = 0x5C;
 
   MD5 md5;
   SHA_160 sha1;
 
   md5.update(data);
   sha1.update(data);
 
   md5.update(secret);
   sha1.update(secret);
 
   for(size_t i = 0; i != 48; ++i)
      md5.update(PAD_INNER);
   for(size_t i = 0; i != 40; ++i)
      sha1.update(PAD_INNER);
 
   SecureVector<byte> inner_md5 = md5.final(), inner_sha1 = sha1.final();
 
   md5.update(secret);
   sha1.update(secret);
   for(size_t i = 0; i != 48; ++i)
      md5.update(PAD_OUTER);
   for(size_t i = 0; i != 40; ++i)
      sha1.update(PAD_OUTER);
   md5.update(inner_md5);
   sha1.update(inner_sha1);
 
   SecureVector<byte> output;
   output += md5.final();
   output += sha1.final();
   return output;
   }
 
}