Decrypted jpg file can't open

[lutsifer]

Hello,

I am trying to write myself "simple" code to encrypt/decrypt jpg images using createCipheriv(). I really stuck on it for 3 days in a row, so I decided to test ready lib and eventually take a look where I am wrong...
So I installed yours cli and guess... it did the same problem as I had three days in a row - the decrypted image won't open! It gives on MAC error message: "Error 3: Unsupported image format".

Any idea what is wrong with this? I really have no idea...

how to reproduce: paste any jpg image, encrypt it (it will give success), decrypt it, it will give you success again, however, the jpg becomes unusable ....

Any help will be greatly appreciated!

[lutsifer]

I suspect the problem to be inside the string encoding part. I tried to alter it to base64:

function encrypt(encKey, content) { let iv_length = 16; let iv = crypto.randomBytes(iv_length); let cipher = crypto.createCipheriv('AES-256-CBC', Buffer.from(encKey), iv); let encrypted = cipher.update(content); encrypted = Buffer.concat([encrypted, cipher.final()]); return iv.toString('base64') + ':' + encrypted.toString('base64'); }

function decrypt(encKey, content){ let textParts = content.split(':'); let iv = Buffer.from(textParts.shift(), 'base64'); let encryptedContent = Buffer.from(textParts.join(':'), 'base64'); let decipher = crypto.createDecipheriv('AES-256-CBC', Buffer.from(encKey), iv); let decrypted = decipher.update(encryptedContent); decrypted = Buffer.concat([decrypted, decipher.final()]); return decrypted.toString(); }
It works well with text files etc, but it fails on jpg as before...