encriptarInformacion.swift

//
//  encriptarInformacion.swift
//  WalMart
//
//  Created by Alberto Luebbert M. on 26/09/17.
//  Copyright © 2017 All rights reserved.
//

import Foundation
import CryptoSwift

class encriptarInformacion {
    //IV de Encripción
    let iv = NSLocalizedString("profile.cadena.segura",comment:"")
    
    //Llave de Encripción
    let datoA16 = NSLocalizedString("profile.cadena.segura",comment:"")
    
    func txtNormToEncript(_ txtToEncript: String) -> String {
        
        let e_Password: String = txtToEncript
        
        let encP = try! e_Password.aesEncrypt(key: datoA16, iv: iv)
        
        
        return encP
        
    }
    
    func txtEncriptToNorm(_ txtToDecript: String) -> String {
        
        let d_Password: String = txtToDecript
        
        let desP = try! d_Password.aesDecrypt(key: datoA16, iv: iv)
        
        return desP
        
    }
    
}

extension String{
    func aesEncrypt(key: String, iv: String) throws -> String {
        let data = self.data(using: .utf8)!
        let encrypted = try! AES(key: key, iv: iv, blockMode: .CBC, padding: PKCS7()).encrypt([UInt8](data))
        let encryptedData = Data(encrypted)
        return encryptedData.base64EncodedString()
    }
    
    func aesDecrypt(key: String, iv: String) throws -> String {
        let data = Data(base64Encoded: self)!
        let decrypted = try! AES(key: key, iv: iv, blockMode: .CBC, padding: PKCS7()).decrypt([UInt8](data))
        let decryptedData = Data(decrypted)
        return String(bytes: decryptedData.bytes, encoding: .utf8) ?? "No puedo desencriptar. Seguramente cambio token encripcion p_walmart"
    }
}