/**
* Encrypt a message with a target users' public key
*
* @param string $source Message to encrypt
* @param EncryptionPublicKey $publicKey
* @param boolean $raw Don't hex encode the output?
* @return string
* @throws CryptoException\CannotPerformOperation
*/
public static function seal(string $source, EncryptionPublicKey $publicKey, bool $raw = false) : string
{
if (!$publicKey instanceof EncryptionPublicKey) {
throw new CryptoException\InvalidKey('Argument 2: Expected an instance of EncryptionPublicKey');
}
if (!function_exists('\\Sodium\\crypto_box_seal')) {
throw new CryptoException\CannotPerformOperation('crypto_box_seal is not available');
}
$sealed = \Sodium\crypto_box_seal($source, $publicKey->getRawKeyMaterial());
if ($raw) {
return $sealed;
}
return \Sodium\bin2hex($sealed);
}
