libantelope

libantelope is an independent C++ library designed for Antelope IO (formerly known as libeosio). Please note that this repository is not affiliated with the official Antelope code.

Compiling the library

To compile this project, you will need the following:

• openssl development files (version 1.1 or later)
• cmake 3.15 or later

Elliptic curve backend

The library offers two different backend implementations for the elliptic curve functionality:

• libsecp256k1
• OpenSSL: Although the default is to use libsecp256k1 for optimization, you still need to link to OpenSSL as other parts of the codebase rely on it.

To switch the implementation, modify the EC_LIB variable in the cmake.

CMake

You can install cmake by referring to the official guide.

Linux

NOTE: Only Ubuntu versions 20.04 and 22.04 are officially supported.

While the project should compile fine on most versions/distros, it is only tested and distributed for Ubuntu 20.04 and 22.04 by Sw/eden.

Dependencies

Ubuntu (or other Debian-based distros)

To install the necessary dependencies (compiler, openssl, and cmake), use the following apt command:

apt-get install gcc g++ cmake libssl-dev

If you require a newer version of cmake, you can refer to the official CMake APT repository.

Other

For other distros, please consult your package manager's manual to install openssl, g++, and cmake. If you need a newer version of cmake, you can follow the official installation guide.

MacOS

Dependencies

Ensure that you have a compiler installed. This project is known to build with Xcode 11.0, but other versions should work as well.

To install openssl and cmake, you can use the following brew command:

brew install openssl cmake

If you require a newer version of cmake, refer to the official installation guide.

Build

mkdir build && cd build
cmake .. && make

MacOS: If your openssl installation is not located at /usr/local/opt/openssl@1.1, you may need to pass the argument -D OPENSSL_ROOT_DIR=/path/to/openssl to cmake and specify the correct path.

Windows

Dependencies

First, ensure that you have a compiler installed.

It is recommended to use Build Tools for Visual Studio 2019 and select C++ during installation.

By default, cmake will utilize the bundled OpenSSL package located at vendor/openssl-1.1.1e-win-static.zip. If you prefer to use a different version of OpenSSL, set the OPENSSL_ROOT_DIR to the directory where OpenSSL is located on your system:

cmake -D OPENSSL_ROOT_DIR=C:/path/to/openssl -B build

NOTE: cmake uses forward slashes / for paths, even on Windows, so ensure that you use them when setting

OPENSSL_ROOT_DIR.

Build

Run cmake:

cmake -B build
cmake --build build --config Release

Security Notice

The library performs elliptic curve cryptographic operations using either the OpenSSL or libsecp256k1 libraries. The libantelope library ensures that sensitive cryptographic information is only stored in computer memory and not exposed to external sources. You are encouraged to inspect the source code and compile it yourself for verification purposes.

However, please use this library at your own risk. While both OpenSSL and libsecp256k1 are widely used and considered safe, we cannot guarantee the cryptographic security of the keys as it depends on the elliptic curve implementation.

Please refer to the LICENSE file for more information.

Author

Henrik Hautakoski - henrik@eossweden.org