How to decrypt a cryptojs text in PHP

Asked Sep 23 '17 at 22:15

Active Sep 23 '17 at 22:32

Viewed 68 times

I use following code in JS to encrypt my data:

const crypto = require('crypto');

const IV_LENGTH = 16; // For AES, this is always 16

export function encrypt(text, key) {
 let iv = crypto.randomBytes(IV_LENGTH);
 let cipher = crypto.createCipheriv('aes-256-cbc', new Buffer(key), iv);
 let encrypted = cipher.update(text);
 encrypted = Buffer.concat([encrypted, cipher.final()]);
 return iv.toString('hex') + ':' + encrypted.toString('hex');
}

I have tried to decrypt it in PHP (with pack('H*',.) etc but I can't find a solution to decode it in PHP. All the time I get the error that the IV is to long because I am not able to transform it back in PHP.

Do you have an idea how I can decrypt it in PHP?

Thank you very much and I wish a nice weekend!

edited Sep 23 '17 at 22:32

asked Sep 23 '17 at 22:15

Developer94

look at this question https://stackoverflow.com/questions/29509934/encrypt-with-cryptojs-and-decrypt-with-php – Aref Ben Lazrek Sep 23 '17 at 22:40
Are you really sure the IV is 128-bit (16 bytes) considering you're using aes-**256** encryption? – RocketNuts Sep 23 '17 at 22:44
@RocketNuts Yes I'am sure and it works also with decrypting with JS.But thanks for the response. – Developer94 Sep 23 '17 at 22:50
@عارفبنالأزرق Hi thanks for the hint but this is a total other process then that what I use.... So I can't get it work.. – Developer94 Sep 23 '17 at 23:20
@RocketNuts The 256 in AES-256 refers to the key size, not the block size. AES has a fixed block size of 128 bits. Just FYI :) – Luke Joshua Park Sep 24 '17 at 07:25
@LukePark You're right, thanks! – RocketNuts Sep 24 '17 at 11:50

How to decrypt a cryptojs text in PHP

0 Answers0