commit | d671b1cc22425bfe6402ebda202a44d0e9988fb2 | [log] [tgz] |
---|---|---|
author | Ken MacKay <kmackay@gmail.com> | Wed Apr 20 21:22:40 2016 -0700 |
committer | Ken MacKay <kmackay@gmail.com> | Wed Apr 20 21:22:40 2016 -0700 |
tree | ee9d9f6399f45accc96f7e3eaece3c45d338611e | |
parent | b6c0cdbe7d20af48b0c2a909a66ff00b093d1542 [diff] |
Add faster ARM multiplication code using UMAAL (#69) On ARM platforms that support UMAAL, this new code should speed up curve operations by 15-20%. There is automatic detection of UMAAL support using compiler macros, but if it doesn't work for a given platform, #define uECC_ARM_USE_UMAAL to 1 or 0 as desired.
A small and fast ECDH and ECDSA implementation for 8-bit, 32-bit, and 64-bit processors.
The static version of micro-ecc (ie, where the curve was selected at compile-time) can be found in the “static” branch.
Compressed points are represented in the standard format as defined in http://www.secg.org/collateral/sec1_final.pdf; uncompressed points are represented in standard format, but without the 0x04
prefix. All functions except uECC_compress()
only accept uncompressed points; use uECC_compress()
and uECC_decompress()
to convert between compressed and uncompressed point representations.
Private keys are represented in the standard format.
I recommend just copying (or symlink) the uECC files into your project. Then just #include "uECC.h"
to use the micro-ecc functions.
For use with Arduino, you can just create a symlink to the uECC
directory in your Arduino libraries
directory. You can then use uECC just like any other Arduino library (uECC should show up in the Sketch=>Import Library submenu).
See uECC.h for documentation for each function.
uECC_OPTIMIZATION_LEVEL
), you must change them in your Makefile or similar so that uECC.c is compiled with the desired values (ie, compile uECC.c with -DuECC_OPTIMIZATION_LEVEL=3
or whatever).-fomit-frame-pointer
GCC option (this is enabled by default when compiling with -O1
or higher).uECC_OPTIMIZATION_LEVEL
>= 3, you must use the -fomit-frame-pointer
GCC option (this is enabled by default when compiling with -O1
or higher).-O1
or higher).advapi32.lib
system library.