defuse / php-encryption - 同一个密钥在不同的机器上不起作用？

Question

I am quite new to the encryption subject.

What I need in my PHP scripts is a simple synchronous encryption for a value I need to store in DB. So I already read several tutorials and posts and decided to go with defuse/php-encryption.

The approach seems quite straight forward

generate a key and use it for further decrypt/encrypt

Encrypt

1. encrypt data with the key
2. store encrypted in DB

Decrypt

1. read encrypted data from DB
2. decrypt it with the key
3. have fun with the plain text

I downloaded v2 of the defuse/php-encryption library from https://github.com/defuse/php-encryption/releases

generated the key

Key::createNewRandomKey();
echo $key->saveToAsciiSafeString();

stored it - for testing - just directly in a getKey() method of my PHP script.

I encrypt/decrypt like this

Crypto::encrypt($plainText, Key::loadFromAsciiSafeString($key));
Crypto::decrypt($encryptedText, Key::loadFromAsciiSafeString($key));

which works like a charm as long as I stay on my machine.

Unfortunately when I switch to my Mac laptop and run the same code - with the same key (!), I get an exception:

PHP Fatal error: Uncaught exception 'Defuse\Crypto\Exception\BadFormatException' with message 'Invalid header.' in phar://classes/encryption/defuse-crypto.phar/src/Encoding.php:177

Stack trace:

#0 phar://classes/encryption/defuse-crypto.phar/src/Key.php(38): Defuse\Crypto\Encoding::loadBytesFromChecksummedAsciiSafeString('\xDE\xF0\x00\x00', 'c622e3d4793e511...')

If I generate a new key on the Mac - it works. But this leaves a very uneasy feeling because I have to be able to decrypt the data with the same key on any machine.

If one day the server crashes and I will have to restore the data on a different machine getting such nice errors while decrypting - I will be doomed :-)

I am definitely doing something wrong. I can use any advice you can provide.

thanks