DataCrypterUsage.swift

extension Data {
    var hexString: String {
        return self.reduce("", { $0 + String(format: "%02x", $1) })
    }
}

do {
            let sourceData = "AES256".data(using: .utf8)!
            let password = "password"
            let salt = AES256Crypter.randomSalt()
            let iv = AES256Crypter.randomIv()
            let key = try AES256Crypter.createKey(password: password.data(using: .utf8)!, salt: salt)
            let aes = try AES256Crypter(key: key, iv: iv)
            let encryptedData = try aes.encrypt(sourceData)
            let decryptedData = try aes.decrypt(encryptedData)
            
            print("Encrypted hex string: \(encryptedData.hexString)")
            print("Decrypted hex string: \(decryptedData.hexString)")
        } catch {
            print("Failed")
            print(error)
        }