/**
* Returns a new set of keys for message encryption and signing.
*
* @param string $seed The seed to use to create repeatable keys.
* @param string $hashKey The key to hash the key with.
* @return array
*/
public static function generateKeys($seed = null, $hashKey = '')
{
# The keys are being generated from a seed.
if ($seed !== null) {
# Generate some repeatable hashes to create keys against for recovery
$encrHash = Hash::hash($seed, $hashKey, Constants::BOX_SEEDBYTES);
$signHash = Hash::hash($seed, $hashKey, Constants::SIGN_SEEDBYTES);
# Build recoverable pre-seeded key pairs.
$seeds = ['encr' => \Sodium\crypto_box_keypair($encrHash), 'sign' => \Sodium\crypto_sign_keypair($signHash)];
} else {
# Build un-recoverable key pairs.
$seeds = ['encr' => \Sodium\crypto_box_keypair(), 'sign' => \Sodium\crypto_sign_keypair()];
}
# Return the two generated key pairs to the client.
return ['encr' => ['pri' => Helpers::bin2hex(\Sodium\crypto_box_secretkey($seeds['encr'])), 'pub' => Helpers::bin2hex(\Sodium\crypto_box_publickey($seeds['encr']))], 'sign' => ['pri' => Helpers::bin2hex(\Sodium\crypto_sign_secretkey($seeds['sign'])), 'pub' => Helpers::bin2hex(\Sodium\crypto_sign_publickey($seeds['sign']))]];
}
/**
* @depends testGenericHash
*/
public function testHashLength()
{
$this->assertTrue(strlen(Hash::hash('test', '', Constants::GENERICHASH_BYTES_MAX)) === Constants::GENERICHASH_BYTES_MAX);
$this->assertTrue(strlen(Hash::hash('test', '', Constants::GENERICHASH_BYTES_MIN)) === Constants::GENERICHASH_BYTES_MIN);
}
