diff options
| author | lloyd <[email protected]> | 2010-08-09 05:05:09 +0000 |
|---|---|---|
| committer | lloyd <[email protected]> | 2010-08-09 05:05:09 +0000 |
| commit | 902ba79d07ffd0b71a35ccf780c60f03be3d3e42 (patch) | |
| tree | 20ad71ee2a84290ac4ee512d23266e27fc7291c8 /src/engine/simd_engine | |
| parent | bb4bddd440520ca3aee94f4b37d9d6425018d9d8 (diff) | |
Add an implementation of AES-128 using SSSE3 instructions. It runs in
constant time and on a Nehalem is significantly faster than the table
based version. This implementation technique was invented by Mike
Hamburg and described in a paper in CHES 2009 "Accelerating AES with
Vector Permute Instructions". This code is basically a translation of
his public domain x86-64 assembly code into intrinsics.
Todo: Adding support for AES-192 and AES-256; this just requires
implementing the key schedules.
Currently only tested on an i7 with GCC (32 and 64 bit code);
testing/optimization on 32-bit processors with SSSE3 like the Atom,
and with Visual C++ and other compilers, are also todos.
Diffstat (limited to 'src/engine/simd_engine')
| -rw-r--r-- | src/engine/simd_engine/simd_engine.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/engine/simd_engine/simd_engine.cpp b/src/engine/simd_engine/simd_engine.cpp index aa434d669..34e1a6838 100644 --- a/src/engine/simd_engine/simd_engine.cpp +++ b/src/engine/simd_engine/simd_engine.cpp @@ -9,6 +9,10 @@ #include <botan/internal/simd_32.h> #include <botan/cpuid.h> +#if defined(BOTAN_HAS_AES_SSSE3) + #include <botan/aes_ssse3.h> +#endif + #if defined(BOTAN_HAS_SERPENT_SIMD) #include <botan/serp_simd.h> #endif @@ -35,6 +39,11 @@ BlockCipher* SIMD_Engine::find_block_cipher(const SCAN_Name& request, Algorithm_Factory&) const { +#if defined(BOTAN_HAS_AES_SSSE3) + if(request.algo_name() == "AES-128" && CPUID::has_ssse3()) + return new AES_128_SSSE3; +#endif + #if defined(BOTAN_HAS_IDEA_SSE2) if(request.algo_name() == "IDEA" && CPUID::has_sse2()) return new IDEA_SSE2; |