ed25519 signature interoperability demo

This is ed25519 signature interoperability demo between python and PHP libraries

Requirements

• python 3.5 or later
• PHP 7.3 or later

Preparation

1. Verify that libsodium support is enabled in PHP

    $ php -i | grep sodium
    sodium
    sodium support => enabled
    libsodium headers version => 1.0.18
    libsodium library version => 1.0.18

2. Install python ed25519 library

    sh install_pyenv.sh

3. Activate virtual environment

    . venv/bin/activate

Run

php sign_demo.php
# or #
python sign_demo.py

These examples can be run in any order.

Files

Once started, several files will be created

• keypair.dat (size 64 bytes) - ed25519 private and public key

• keyseed.dat (size 32 bytes) - sodium key seed for ed25519

Hint: first 32 byets of keypair.dat == keyseed.dat

• hello.msg - message to sign (you can edit this file)

• hello.sig - signature of message (in base64 encoding)

Hint: you can modify hello.msg to sign a custom message but don't forget to delete hello.sig

Troubleshooting

PHP

PHP Fatal error:  Uncaught Error: Call to undefined function sodium_crypto_sign_keypair() in ...

You use PHP older than 7.2 or the sodium library support is disabled

Python

ImportError: No module named ed25519

You have not installed dependencies or activated the virtual environment, please use install_pyenv.sh

Copyright

(c) 2020 Volodymyr Flonts

Licensed under MIT