emsha 1.1.0
A compact HMAC-SHA-256 C++11 library.
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This library is an MIT-licensed HMAC-SHA-256 C++11 library designed for embedded systems. It is built following the JPL Power of Ten rules. It was written in response to a need for a standalone HMAC-SHA-256 package that could run on several platforms.
The source code is available via Github; each version should be git tagged. :
git clone https://github.com/kisom/libemsha git clone git@github.com:kisom/libemsha
The current release is 1.0.1.
The project is built using Autotools and make
.
When building from a git checkout, the [autobuild]{.title-ref} script will bootstrap the project from the autotools sources (e.g. via autoreconf -i
), run configure
(by default to use clang), and attempt to build the library and run the unit tests.
Once the autotools infrastructure has been bootstrapped, the following should work: :
./configure && make && make check && make install
There are three flags to configure
that might be useful:
--disable-hexstring
disables the provided hexstring
function; while this might be useful in many cases, it also adds extra size to the code.--disable-hexlut
disables the larger lookup table used by hexstring
, which can save around a kilobyte of program space. If the hexstring
function is disabled, this option has no effect.--disable-selftest
disables the internal self-tests, which can reclaim some additional program space.Documentation is currently done with Sphinx. See doc/
.
Footnotes
[^1]: This library came about after extracting the relevant C code from RFC 6234, and needing a C++ version. It draws heavy inspiration from that code base.