Standalone implemention of authenticated encryption algorithms (currently only GCM).
authenc uses CMake for building:
mkdir build
cd build
cmake -DBACKEND=ref ..
make
This will build libauthenc.a and some test programs.
You can change the "ref" backend to any of the folders in src/ .
Currently there is:
- ref: naive C-only backend
- armv7-neon: ARMv7 speed-optimized with NEON (VMULL.P8); with side-channel resistance. Includes bitsliced AES by Bernstein and Schwabe.
- armv8-aarch32-neon: 32-bit ARMv8 speed optimized with NEON (VMULL.P64) and AES instructions.
- armv8-aarch64-neon: 64-bit ARMv8 speed optimized with NEON (PMULL) and AES instructions.
You can skip CMake by simply building all the files in src/, all the files in src/backend/, and all the files
in src/ref/ which are listed in src/backend/CMakeLists.txt.
You'll need to create a project and include the files manually. Make sure to compile backend specific code with the corresponding architecture. I'll eventually try to commit the project itself.
A simple benchmark program is included in bench/bench_ac_gcm.c, which should be compiled in the bench_ac_gcm binary by CMake.
By default it uses clock_gettime to measure times. Change the #define TIMER in bench/authenc_bench.c to MACH in order to
use mach_timebase_info in iOS.
When running on the Galaxy Note 4 (or any big.LITTLE ARM processor), you can choose which core will run the benchmark by defining
AUTHENC_BENCH_CORE at the top bench_ac_gcm.c with the index of the core to run (e.g. #define AUTHENC_BENCH_CORE 7)
MIT License, except benchmark code which was copied from RELIC and is LGPL, but it isn't compiled into the library.