KeyManagement.md

Key management

Use the Ed25519Key or Secp256K1Key classes to work with public/private key pairs.

Creating new key pairs

$newKeyPair = new Casper\Util\Crypto\Ed25519Key();

$anotherKeyPair = new Casper\Util\Crypto\Secp256K1Key();

Reading keys from PEM files

To read a key from a PEM file use the method createFromPrivateKeyFile()

$keyPair = \Casper\Util\Crypto\Ed25519Key::createFromPrivateKeyFile('/tmp/my_ed25519_pk.pem');

$anotherKeyPair = \Casper\Util\Crypto\Secp256K1Key::createFromPrivateKeyFile('/tmp/my_secp256k1_pk.pem');

Exporting to PEM

When you create a new key you may want to save the private part in a file for later usage.

$privateKeyPemString = $keyPair->exportPrivateKeyInPem();
file_put_contents('/tmp/private_key.pem', $privateKeyPemString);

You can also export the public key part

$publicKeyPemString = $keyPair->exportPublicKeyInPem();
file_put_contents('/tmp/public_key.pem', $publicKeyPemString);

Signing and verifying

You can sign any message by sign() method and verify signature by verify() method

$message = 'Hello';

$signature = $keyPair->sign($message);
$isVerified = $keyPair->verify($signature, $message);