1 files changed, 49 insertions, 0 deletions
diff --git a/modules/asm_ia32/serpent.cpp b/modules/asm_ia32/serpent.cpp
new file mode 100644
index 000000000..aacb72b0f
--- /dev/null
+++ b/modules/asm_ia32/serpent.cpp
@@ -0,0 +1,49 @@
+/*************************************************
+* Serpent Source File                            *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#include <botan/serpent.h>
+#include <botan/loadstor.h>
+
+namespace Botan {
+
+extern "C" {
+
+void serpent_encrypt(const byte[16], byte[16], const u32bit[132]);
+void serpent_decrypt(const byte[16], byte[16], const u32bit[132]);
+void serpent_key_schedule(u32bit[140]);
+
+}
+
+/*************************************************
+* Serpent Encryption                             *
+*************************************************/
+void Serpent::enc(const byte in[], byte out[]) const
+   {
+   serpent_encrypt(in, out, round_key);
+   }
+
+/*************************************************
+* Serpent Decryption                             *
+*************************************************/
+void Serpent::dec(const byte in[], byte out[]) const
+   {
+   serpent_decrypt(in, out, round_key);
+   }
+
+/*************************************************
+* Serpent Key Schedule                           *
+*************************************************/
+void Serpent::key(const byte key[], u32bit length)
+   {
+   SecureBuffer<u32bit, 140> W;
+   for(u32bit j = 0; j != length / 4; ++j)
+      W[j] = make_u32bit(key[4*j+3], key[4*j+2], key[4*j+1], key[4*j]);
+   W[length / 4] |= u32bit(1) << ((length%4)*8);
+
+   serpent_key_schedule(W);
+   round_key.copy(W + 8, 132);
+   }
+
+}