String+AES.swift

String+AES.swift

import Foundation
import CryptoSwift

extension String {
 
    func aesEncrypt(key: String, iv: String) throws -> String{
        let data = self.dataUsingEncoding(NSUTF8StringEncoding)
        let enc = try AES(key: key, iv: iv, blockMode:.CBC).encrypt(data!.arrayOfBytes(), padding: PKCS7())
        let encData = NSData(bytes: enc, length: Int(enc.count))
        let base64String: String = encData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0));
        let result = String(base64String)
        return result
    }
    
    func aesDecrypt(key: String, iv: String) throws -> String {
        let data = NSData(base64EncodedString: self, options: NSDataBase64DecodingOptions(rawValue: 0))
        let dec = try AES(key: key, iv: iv, blockMode:.CBC).decrypt(data!.arrayOfBytes(), padding: PKCS7())
        let decData = NSData(bytes: dec, length: Int(dec.count))
        let result = NSString(data: decData, encoding: NSUTF8StringEncoding)
        return String(result!)
    }
}

Awesome extension, very handy!

I was linked here through a SO question, for those having errors like:

"Block size and Initialization Vector must be the same length", or
"Unknown AES variant for given key."

It took me way longer than I'd admit to figure out so I thought I might save someone some time:

1. The IV must be the same of block size, a constant defined in the code, which is 16B. That means your IV must be exactly 16 bytes/characters long.
2. Using this extension, the key must be exactly 128, 192 or 256 bits long (16, 24 or 32 bytes/characters).

was it AES-128?If its not can you fix it,please?

How do you decrypt this in PHP?

How do you encrypt with PHP to be able to decrypt it in SWIFT?

Here what we have to pass as input parameters for key and iv.

I tried to convert to Swift 3.0.2 as follows:
extension String {

func aesEncrypt(_ key: String, iv: String) throws -> String? {
    guard let data = self.data(using: String.Encoding.utf8) else {
        return nil
    }
    let enc = try AES(key: key, iv: iv, blockMode:.CBC).encrypt(data)
    let encData = Data(bytes: enc, count: Int(enc.count))
    let base64String: String = encData.base64EncodedString(options: Data.Base64EncodingOptions.init(rawValue: 0))
    let result = String(base64String)
    return result
}

func aesDecrypt(_ key: String, iv: String) throws -> String? {
    guard let data = Data(base64Encoded: self, options: NSData.Base64DecodingOptions(rawValue: 0)) else {
        return nil
    }
    let dec = try AES(key: key, iv: iv, blockMode:.CBC).decrypt(data)
    let decData = Data(bytes: dec, count: Int(dec.count))
    let result = NSString(data: decData, encoding: String.Encoding.utf8.rawValue)
    return String(result!)
}

}

Can you check the version above?

How to use this code?
let data : String = blablabla
data = data.aesEncrypt(_ key: key, iv: iv)?
it?

Hello,

When i import "CryptoSwift" to my class, error showing.
Which framework will added to my project when i import "CryptoSwift"?

@sourmarsi you need to use pods and added this https://github.com/krzyzanowskim/CryptoSwift

@imadeit thank you =)

i get this error: Argument labels '(key:, iv:, blockMode:)' do not match any available overloads
in
let enc = try AES(key: key, iv: iv, blockMode:.CBC).encrypt(data)
=(

@ginppian
I'm no expert and am having many issues as well with this implementation, but the way to fix your line is this:
let enc = try AES(key: key, blockMode: .CBC(iv: iv)).encrypt(data)

I have an encrypted text which is encrypted using AES-128 (given by other person). I want to decrypt the same in Swift(for IOS). Anyone have any idea how to use this? I just have an encrypted text and a Password for the same.. Please help...

am also facing this error

Argument labels '(key:, iv:, blockMode:)' do not match any available overloads

 func aesDecrypt(key: String, iv: String) throws -> String {
        let data = NSData(base64Encoded: self, options: NSData.Base64DecodingOptions(rawValue: 0))
        let dec = try AES(key: key, iv: iv, blockMode:.CBC).decrypt(data!.arrayOfBytes(), padding: .pkcs7)
        let decData = NSData(bytes: dec, length: Int(dec.count))
        let result = NSString(data: decData, encoding: NSUTF8StringEncoding)
        return String(result!)
    }

Did anyone found a solution for this error? Argument labels '(key:, iv:, blockMode:)' do not match any available overloads

in swift 5 ???? not works

Swift 5.2

func cryptoSwiftAESEncrypt(key: String, iv: String ) -> String? {
        guard let dec = try? AES(key: key, iv: iv, padding: .pkcs7).encrypt(Array(self.utf8)) else {   return nil }
        let decData = Data(bytes: dec, count: Int(dec.count)).base64EncodedString(options: .lineLength64Characters)
        return decData
}

func cryptoSwiftAESDecrypt(key: String, iv: String) -> String? {
      guard let dec = try? AES(key: key, iv: iv, padding: .pkcs7).decrypt(Array(self.utf8)) else {    return nil    }
      let decData = Data(bytes: dec, count: Int(dec.count)).base64EncodedString(options: .lineLength64Characters)
      return decData
}

I have a bytearray. I want to encrypt it. can i use it instead of a string.

Swift 5.2

func cryptoSwiftAESEncrypt(key: String, iv: String ) -> String? {
        guard let dec = try? AES(key: key, iv: iv, padding: .pkcs7).encrypt(Array(self.utf8)) else {   return nil }
        let decData = Data(bytes: dec, count: Int(dec.count)).base64EncodedString(options: .lineLength64Characters)
        return decData
}

func cryptoSwiftAESDecrypt(key: String, iv: String) -> String? {
      guard let dec = try? AES(key: key, iv: iv, padding: .pkcs7).decrypt(Array(self.utf8)) else {    return nil    }
      let decData = Data(bytes: dec, count: Int(dec.count)).base64EncodedString(options: .lineLength64Characters)
      return decData
}

cryptoSwiftAESDecrypt is not working and show some error related to DataPadding or Vector. I forgot original error after editing the method, but the encrypted String is base64 encoded, so I decoded it into Data first, before passing as byte array to decrypt.

Feel free to correct me. I am posting this just in case someone has similar error.

func cryptoSwiftAESDecrypt(key: String, iv: String) -> String? {
        guard let data = Data(base64Encoded: self),
              let dec = try? AES(key: key, iv: iv, padding: .pkcs7).decrypt(data.bytes) else { return nil }
        
        let decData = Data(bytes: dec, count: Int(dec.count))
        
        return String(data: decData, encoding: .utf8)
}

@seonar22 How do Decrypt without IV? because i don't have IV.
I just have a string and KEY for decryption.