commit | df3398e0c550f323afc00afd8faa3e08869f8874 | [log] [tgz] |
---|---|---|
author | prabhukr <prabhukr@google.com> | Wed Apr 19 20:03:53 2023 +0000 |
committer | Prabhu Karthikeyan Rajasekaran <prabhukr@google.com> | Wed Apr 19 20:03:53 2023 +0000 |
tree | 75c135df0aa8565cb7fa27f2f7a623cd63b4d9f0 | |
parent | 13721361f72877decb07cc7747b7a104dbdb0656 [diff] |
Update ARM inline assembly constraints. Inline assembly in uECC_vli_add is underspecified; the output registers are written to before the input registers are fully consumed. Updating the constraints to include earlyclobber `&`. bug: b/278442070 Change-Id: I1f4c28aeca875c7cdcf1d0847d5dbebc7835b081 Reviewed-on: https://pigweed-review.googlesource.com/c/third_party/github/kmackay/micro-ecc/+/139830 Reviewed-by: Ali Zhang <alizhang@google.com>
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/sec1-v2.pdf; uncompressed points are represented in standard format, but without the 0x04
prefix. All functions except uECC_decompress()
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 use the Library Manager to download micro-ecc (Sketch=>Include Library=>Manage Libraries). 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.