Decrypt String AES 256 outside of Laravel

Question

I'm using framework laravel for encryption some string, in my laravel i write the code like this :

public function getBankNameAttribute(){
    return Crypt::encrypt($this->attributes['bank_name']);
}

The result is String 'abc' encrypted to String

'eyJpdiI6InBxeTlKOVdFQ1FoN2hGNDdPSTJZUnc9PSIsInZhbHVlIjoiVzlQYVpsSlptUHF6QUMwalM0c21vZz09IiwibWFjIjoiNGFlYmY3OTk2MDUyYTcwMzMxMGYzYmQzODRhODUyNWRlZjMzNjNmMDU5NTJiMDg2NmJjNzhkYjI5NTkzYzI1YSJ9'

The return of the encrypt is always different because of generate IV from laravel.If the output is always different,how can i decrypt the string outside laravel. Especially for Android.

I have searching the whole documentation on Google, but no one made it for Android. Thanks in advance.

[Probabl this can help](http://www.logikdev.com/2010/11/01/encrypt-with-php-decrypt-with-java/). — The Alpha, Jul 23 '15 at 05:56
I'm confusing at $value = openssl_encrypt($value, $this->cipher, $this->key, 0, $iv); how to openssl_decrypt in android, I want a simple way.. — Xenix Putra Sasongko, Jul 23 '15 at 07:12

ioss · Answer 1 · 2017-11-30T08:56:11.500

The link in the comment by TheAlpha should be enough. I'll just add that if you Base64 decode the string 'eyJpdiI6InBxeTlKOVdFQ1FoN2hGNDdPSTJZUnc9PSIsInZhbHVlIjoiVzlQYVpsSlptUHF6QUMwalM0c21vZz09IiwibWFjIjoiNGFlYmY3OTk2MDUyYTcwMzMxMGYzYmQzODRhODUyNWRlZjMzNjNmMDU5NTJiMDg2NmJjNzhkYjI5NTkzYzI1YSJ9' (for instance using https://www.base64decode.org/) you will get a JSON file with three values:

iv: Initial Vector - used to generate randomness when encrypting - needed to decrypt
value: the value that you actually want to decrypt - you need the iv and the secret key used to encrypt to actually decrypt it
mac: you can use to check that the value has not been tampered with. This optional but recommended.

See also: How to decrypt in Java (Android) text that was encrypted with Crypt in Laravel?

Decrypt String AES 256 outside of Laravel

1 Answers1