Decrypt in PHP about rncryptor

[danielvy]

The data block you receive from RNCryptor's encrypt is not just the encrypted AES output, it also contains some meta data, IV, Salt and HMAC. See the description of the format here:

https://github.com/rnapier/RNCryptor/wiki/Data-Format

So you either:

1. Use lower level functions in iOS to create the encryption key and IV yourself to be later used in PHP (but then, why use RNCryptor in the first place)
2. Extract these parts from the RNCryptor format in PHP and call the PHP decrypt functions with the relevant parts of it (note you need to use PBKDF2 to recreate the key from the pass + salt).
3. Or you extract it from the RNCryptor format in iOS and submit it separately (but will still need to create the key from pass + salt).

[jacksun1203]

Thanks for the comments. I will those suggestions. Thanks again!