Support Key-Based encryption (not from keys derived from a password)

[LookingSharp]

Thanks for sharing this @TGIO!

I use RNCryptor on iOS, and the iOS version supports encrypting directly from the keys, without having to pay for PBKDF2. In the readme he covers it in the Key-Based Encryption section.

In swift, key based encryption code looks like this -

let _keyEncryption: NSData
let _keyHMAC: NSData

let encryptor = RNCryptor.EncryptorV3(encryptionKey: _keyEncryption, hmacKey: _keyHMAC)
let encryptedData = encryptor.encryptData(clearData)

It would be great if RNCryptorNative supported just using the keys.

[getsadzeg]

You mean both encryptionKey and hmacKey?

[rnapier]

Correct. The v3 format requires that you provide both an encryption and hmac key. It will generate both for you from a password, but in the key mode, you need to provide both.

[getsadzeg]

Yes. I think it's gonna be written in native, C++.

[erawhctim]

Is there any update on the progress on this issue? Any open/in-progress pull requests? Any way to help?