Check in an initial assembler implementation of SHA-1 for x86-64 systems.

It is not amazingly optimized, about 5% faster than what GCC 4.1.1 does
on my Core2 with the normal C++ code, but it's a start.

1 files changed, 52 insertions, 0 deletions

diff --git a/modules/alg_amd64/sha160.cpp b/modules/alg_amd64/sha160.cpp
new file mode 100644
index 000000000..754f8a01c
--- /dev/null
+++ b/modules/alg_amd64/sha160.cpp
@@ -0,0 +1,52 @@
+/*************************************************
+* SHA-160 Source File                            *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/sha160.h>
+#include <botan/bit_ops.h>
+
+namespace Botan {
+
+extern "C" void sha160_core(u32bit[5], const byte[64], u32bit[80]);
+
+/*************************************************
+* SHA-160 Compression Function                   *
+*************************************************/
+void SHA_160::hash(const byte input[])
+   {
+   sha160_core(digest, input, W);
+   }
+
+/*************************************************
+* Copy out the digest                            *
+*************************************************/
+void SHA_160::copy_out(byte output[])
+   {
+   for(u32bit j = 0; j != OUTPUT_LENGTH; ++j)
+      output[j] = get_byte(j % 4, digest[j/4]);
+   }
+
+/*************************************************
+* Clear memory of sensitive data                 *
+*************************************************/
+void SHA_160::clear() throw()
+   {
+   MDx_HashFunction::clear();
+   W.clear();
+   digest[0] = 0x67452301;
+   digest[1] = 0xEFCDAB89;
+   digest[2] = 0x98BADCFE;
+   digest[3] = 0x10325476;
+   digest[4] = 0xC3D2E1F0;
+   }
+
+/*************************************************
+* SHA_160 Constructor                            *
+*************************************************/
+SHA_160::SHA_160() : MDx_HashFunction(20, 64, true, true), W(80)
+   {
+   clear();
+   }
+
+}