IOS Swift AES(128, 192, 256) 암복호화

AES 암복호화

• CryptoSwift 라이브러리 Pod 추가
  • 추가 : pod 'CryptoSwift', '~> 1.3.8'
  • 설치 : pod install
  • 링크 : https://github.com/krzyzanowskim/CryptoSwift
• key값의 길이에 따라 AES128, AES192, AES256 으로 구분됨
  • AES128 : 키값 16bytes
  • AES192 : 키값 24bytes
  • AES256 : 키값 32bytes

 

 

예제 코드(AES256)

import Foundation
import CryptoSwift
 
//라이브러리 : https://github.com/krzyzanowskim/CryptoSwift
//pod 'CryptoSwift', '~> 1.3.8'
class AES256Util {
    //키값 32바이트: AES256(24bytes: AES192, 16bytes: AES128)
    private static let SECRET_KEY = "01234567890123450123456789012345"
    private static let IV = "0123456789012345"
 
    static func encrypt(string: String) -> String {
        guard !string.isEmpty else { return "" }
        return try! getAESObject().encrypt(string.bytes).toBase64() ?? ""
    }
 
    static func decrypt(encoded: String) -> String {
        let datas = Data(base64Encoded: encoded)
 
        guard datas != nil else {
            return ""
        }
 
        let bytes = datas!.bytes
        let decode = try! getAESObject().decrypt(bytes)
 
        return String(bytes: decode, encoding: .utf8) ?? ""
    }
 
    private static func getAESObject() -> AES{
        let keyDecodes : Array<UInt8> = Array(SECRET_KEY.utf8)
        let ivDecodes : Array<UInt8> = Array(IV.utf8)
        let aesObject = try! AES(key: keyDecodes, blockMode: CBC(iv: ivDecodes), padding: .pkcs5)
 
        return aesObject
    }
}