gitea doesn't support rST READMEs.

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Kyle Isom 2023-10-18 03:42:15 -07:00
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libemsha
========
[![image](https://travis-ci.org/kisom/libemsha.svg?branch=master)](https://travis-ci.org/kisom/libemsha)
[![image](https://scan.coverity.com/projects/7318/badge.svg)](https://scan.coverity.com/projects/libemsha-52f2a5fd-e759-43c2-9073-cf6c2ed9abdb)
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](http://spinroot.com/gerard/pdf/P10.pdf) rules. It was written in
response to a need for a standalone HMAC-SHA-256 package that could run
on several platforms.
Getting and Building the Source
-------------------------------
The source code is available via
[Github](https://github.com/kisom/libemsha/); 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](https://github.com/kisom/libemsha/releases/tag/v1.0.1).
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
-------------
Documentation is currently done with [Sphinx](http://sphinx-doc.org/).
See `doc/`.
### See also
- [FIPS 180-4, the Secure Hash
Standard](http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf)
- [FIPS 198-1, The Keyed-Hash Message Authentication Code
(HMAC)](http://csrc.nist.gov/publications/fips/fips198-1/FIPS-198-1_final.pdf)
- [RFC 2014, HMAC: Keyed-Hashing for Message
Authentication](https://tools.ietf.org/html/rfc2104)
- [RFC 6234, US Secure Hash Algorithms (SHA and SHA-based HMAC and
HKDF)](https://tools.ietf.org/html/rfc6234)[^1]
- The behaviour of this package was cross-checked using the Go 1.5.1
linux/amd64 standard library\'s
[crypto/sha256](https://golang.org/src/crypto/sha256/) package.
**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.

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libemsha
========
.. image:: https://travis-ci.org/kisom/libemsha.svg?branch=master
:target: https://travis-ci.org/kisom/libemsha
.. image:: https://scan.coverity.com/projects/7318/badge.svg
:target: https://scan.coverity.com/projects/libemsha-52f2a5fd-e759-43c2-9073-cf6c2ed9abdb
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
<http://spinroot.com/gerard/pdf/P10.pdf>`_ rules. It was written in
response to a need for a standalone HMAC-SHA-256 package that could run
on several platforms.
-------------------------------
Getting and Building the Source
-------------------------------
The source code is available via `Github
<https://github.com/kisom/libemsha/>`_; 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 <https://github.com/kisom/libemsha/releases/tag/v1.0.1>`_.
The project is built using Autotools and ``make``.
When building from a git checkout, the `autobuild` 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
-------------
Documentation is currently done with `Sphinx <http://sphinx-doc.org/>`_.
See ``doc/``.
See also
--------
* `FIPS 180-4, the Secure Hash Standard <http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf>`_
* `FIPS 198-1, The Keyed-Hash Message Authentication Code (HMAC) <http://csrc.nist.gov/publications/fips/fips198-1/FIPS-198-1_final.pdf>`_
* `RFC 2014, HMAC: Keyed-Hashing for Message Authentication <https://tools.ietf.org/html/rfc2104>`_
* `RFC 6234, US Secure Hash Algorithms (SHA and SHA-based HMAC and HKDF) <https://tools.ietf.org/html/rfc6234>`_\ [#f1]_
* The behaviour of this package was cross-checked using the Go 1.5.1
linux/amd64 standard library's `crypto/sha256 <https://golang.org/src/crypto/sha256/>`_
package.
.. rubric:: Footnotes
.. [#f1] 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.