Can't convert encrypted data to String

Question

I am trying to learn to use RNCryptor. Here is what I am using:

let key = \"1234\"
let original_text = \"hello\"
let data = original_text.data(using: .utf8)!
let         


        

Answer 1

The encrypted data is a binary blob, and in most cases not a valid UTF-8 sequence. Therefore the conversion to a string

String(data: encrypted_data, encoding: .utf8)

fails and returns nil. If you want a string representation of the encrypted data then you can use (for example) the Base64 encoding:

print(encrypted_data.base64EncodedString())

or, using

extension Data {
    func hexEncodedString() -> String {
        return map { String(format: "%02hhx", $0) }.joined()
    }
}

from How to convert Data to hex string in swift, as a hex-encoded string:

print(encrypted_data.hexEncodedString())