iOS How to encrypt images and data Swift 4

Question

I work with corporate date which must be protected.

I have data for example:

let userName = String()
let password = String()
let profileImage = UIImage()

So this data i want to encrypt this data and send to server.

Important: to decrypt i want to use special key which will store at the app?

So it's possible to do this?

HTTPS does the encryption for free, for you, just use that protocol when sending data to the server. — Cristik, Oct 16 '18 at 06:04
To encrypt short pieces of text, Google how to use the keychain from Security Framework. To encrypt images: https://stackoverflow.com/questions/45206786/image-encryption-in-swift — Jasper Blues, Oct 16 '18 at 06:05
@Cristik i want when i send data to server, at the column will storage something like this "kjfkjhh212ki121#122", i don't want to crypt HTTPS — Andrew, Oct 16 '18 at 06:16
In the case of a password you don't want to encrypt the data; Rather you should store a salted hash of the password. In the future you compute the same hash and compare the hashed values rather than having a situation where the password can be decrypted back to plain text — Paulw11, Oct 16 '18 at 06:34
She this URL https://medium.com/@shyamalranjana/swift-encryption-aes-256-ecb-sha512-41fd76779ded I think help you — Sabbir Ahmed, Oct 16 '18 at 06:50

score 0 · Accepted Answer · answered Oct 16 '18 at 16:36

For string the Encryption and Decryption can be done using RNCryptor.

import Foundation
import RNCryptor

extension String {

    func encrypt(encryptionKey: String) -> String {
        let messageData = self.data(using: .utf8)!
        let cipherData = RNCryptor.encrypt(data: messageData, withPassword: encryptionKey)
        return cipherData.base64EncodedString()
    }

    func decrypt(encryptionKey: String) -> String? {
        let encryptedData = Data.init(base64Encoded: self)!
        if let value = try? RNCryptor.decrypt(data: encryptedData, withPassword: encryptionKey) {
            let decryptedString = String(data: value, encoding: .utf8)!
            return decryptedString
        } else{
            return nil
        }
    }
}

Usage:-

let encyptionKey = "password"
let unencriptedMessage = "Hello World"
print (unencriptedMessage)
let encryptedMessage = unencriptedMessage.encrypt(encryptionKey: encyptionKey)
print (encryptedMessage)
if let decryptedMessage = encryptedMessage.decrypt(encryptionKey: encyptionKey) {
    print (decryptedMessage)
}

Output:-

iOS How to encrypt images and data Swift 4

1 Answers1