Native extension gem for secp256k1 ECDSA. Wraps libsecp256k1. In rbsecp256k1 3.0.0 and later libsecp256k1 is bundled with the gem.
Why wrap libsecp256k1?
libsecp256k1 is an extremely optimized implementation of public key derivation, signing, and verification with the secp256k1 elliptic curve. It comes with its own set of benchmarks, but from benchmarking done by Peter Wuille it is ~4.9x faster than the OpenSSL implementation of the same curve. It is the only library that provides constant time signing of this curve and has been deployed as part of Bitcoin since v0.10.0
Natively wrapping the library in an extension gem means users don't have to worry about compiling or locating the library, unlike many FFI based gems.
The simplest installation:
gem install rbsecp256k1
If you want to use your system version of libsecp256k1 rather than the bundled
version use the
gem install rbsecp256k1 -- --with-system-libraries
Install the dependencies for building libsecp256k1 and this library:
sudo apt-get install build-essential automake pkg-config libtool \ libffi-dev libssl-dev libgmp-dev python-dev
NOTE: If you have installed libsecp256k1 but the gem cannot find it. Ensure
you have run
ldconfig so that your library load paths have been updated.
Dependencies for building libsecp256k1 and this library:
brew install openssl libtool pkg-config gmp libffi
See rbsecp256k1 documentation for examples and complete list of supported functionality.
To clone the repository and its submodules you'll need to the following:
git clone firstname.lastname@example.org:etscrivner/rbsecp256k1.git
Development is largely facilitated by a makefile. After download you should run the following command to set up your local environment:
To compile the extension gem run the following (this is required to run tests):
To test with recovery functionality disabled run:
make test WITH_RECOVERY=0
To test with ECDH functionality disabled run:
make test WITH_ECDH=0
To test with both disabled run:
make test WITH_RECOVERY=0 WITH_ECDH=0
Installing Gem Locally
To install the gem locally and verify builds you can run:
Uninstall Gem Locally
You can similarly uninstall the local gem by running the following:
To clean up and do a fresh build:
Running YARD Documentation Server
To run the YARD documentation server: