libantelope

Independent C++ library for Antelope IO (former libeosio)

NOTE: This repository has no connection to the official Antelope code.

Compiling the library

You will need openssl development files (version 1.1 or later) to compile and cmake 3.15 or later to compile this project.

Elliptic curve backend

There is two different backend implementation for the elliptic curve part of the library:

• OpenSSL as mentioned before. however you still need to link to openssl even if it is not used as the EC backend because more of the codebase uses it.

• libsecp256k1

Default is to use libsecp256k1 as it is more optimized.

You can switch implementation by modifing the cmake variable EC_LIB.

CMake

You can install cmake by reading the official guide.

Linux

NOTE: Only Ubuntu 20.04 and 22.04 is officially supported.

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

Dependencies

Ubuntu (or other debian based distros)

First you need to have a compiler, openssl and cmake. this can be installed with apt.

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

If you need a newer version of cmake then apt provides. Checkout the official CMake APT repository.

Other

Consult your package manager's manual for getting openssl,g++ and cmake installed.

If you need a newer version of cmake then your package manager provides. checkout the official guide.

MacOS

Dependencies

You must have a compiler installed. This project is known to build with Xcode 11.0 but other versions should work.

You need to have openssl and cmake installed also, this can be done with this brew command:

$ brew install openssl cmake

If you need a newer version of cmake then brew provides. checkout the official guide

Build

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

MacOS: You may need to point cmake to openssl by passing the argument -D OPENSSL_ROOT_DIR=/usr/local/opt/openssl@1.1 if openssl is not under /usr/local/opt/openssl@1.1 you need to find the correct path.

Windows

Dependencies

First you will need a compiler.

Build Tools for Visual Studio 2019 (Selecting C++ during installation) is recommended.

By default cmake will use the bundled openssl package located at vendor/openssl-1.1.1e-win-static.zip

If you like to use an other version of OpenSSL then the static one bundled with this repo you need to set OPENSSL_ROOT_DIR to the directory where OpenSSL is located on the system.

For example:

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

NOTE: cmake uses forward slash / for path even for windows. so make sure you use that when setting OPENSSL_ROOT_DIR

Build.

Run cmake

C:\repo> cmake -B build
C:\repo> cmake --build build --config Release

Security notice

Elliptic curve crypthographic operations is done using either OpenSSL or libsecp256k1 libraries. This library (libantelope) will never expose sensitve cryptographic information to anything but the computers memory. You are free to inspect the source code and compile yourself to verify.

However, use this at your own risk. we cannot guarantee that the keys are cryptographically secure as this depends on the elliptic curve implementation (alto both OpenSSL and libsecp256k1 are widely used and should be safe)

Please read the LICENSE file.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Author

Henrik Hautakoski - henrik@eossweden.org