我想在iOS Swift中使用 DES-ECB-PKCS5Padding 进行加密/解密。
我从服务器端(很可能是在ActionScript中)获得了一些代码来帮助您,如下所示:
private static const type:String='simple-des-ecb';
public static function encrypt(txt:String, salt:String): String
{
var key:ByteArray = Hex.toArray(Hex.fromString(salt));
var data:ByteArray = Hex.toArray(Hex.fromString(txt));
var pad:IPad = new PKCS5;
var mode:ICipher = Crypto.getCipher(type, key, pad);
pad.setBlockSize(mode.getBlockSize());
mode.encrypt(data);
data.position = 0;
return Base64.encodeByteArray(data);
}
public static function decrypt(txt:String, salt:String): String
{
var key:ByteArray = Hex.toArray(Hex.fromString(salt));
var data:ByteArray = Base64.decodeToByteArray(txt);
var pad:IPad = new PKCS5;
var mode:ICipher = Crypto.getCipher(type, key, pad);
pad.setBlockSize(mode.getBlockSize());
try
{
mode.decrypt(data);
}
catch (e:Error)
{
trace(e.message);
trace(e.getStackTrace());
}
return Hex.toString(Hex.fromArray(data));
}
我已经尝试在 Swift 中实现上述功能,但是我无法获得预期的结果
我的Swift代码如下:
func encrypt(text: String, salt: String) -> String {
let strHexKey = hexFromString(string: salt)
let key = strHexKey.hexaBytes
let strHexData = hexFromString(string: text)
let data = strHexData.hexaBytes
let cryptor = Cryptor(operation: .encrypt, algorithm: .des, options: .PKCS7Padding, key: key, iv: Array<UInt8>())
let cipherText = cryptor.update(byteArray: data)?.final()
let strBase64 = cipherText!.data.base64EncodedString()
return strBase64
}
func decrypt(text: String, salt: String) -> String {
let strHexKey = hexFromString(string: salt)
let key = arrayFrom(hexString: strHexKey)
let data = text.fromBase64()?.data(using: .utf8)
let cryptor = Cryptor(operation: .decrypt, algorithm: .des, options: .PKCS7Padding, key: key, iv: Array<UInt8>())
let cipherText = cryptor.update(data: data!)!.final()
return (cipherText?.hexa)!
}
我一直在使用https://github.com/iosdevzone/IDZSwiftCommonCrypto作为加密库。
答案 0 :(得分:4)
快捷代码
将ActionScript代码转换为Swift可能是这样的:
func encrypt(text: String, salt: String) -> String? {
let key = Array(salt.utf8)
let bytes = Array(text.utf8)
let cryptor = Cryptor(operation: .encrypt, algorithm: .des, options: [.ECBMode, .PKCS7Padding], key: key, iv:[UInt8]())
if let encrypted = cryptor.update(byteArray: bytes)?.final() {
return Data(encrypted).base64EncodedString()
}
return nil
}
func decrypt(text: String, salt: String) -> String? {
let key = Array(salt.utf8)
let bytes = [UInt8](Data(base64Encoded: text)!)
let cryptor = Cryptor(operation: .decrypt, algorithm: .des, options: [.ECBMode, .PKCS7Padding], key: key, iv:[UInt8]())
if let decrypted = cryptor.update(byteArray: bytes)?.final() {
return String(bytes: decrypted, encoding: .utf8)
}
return nil
}
快速测试
在您用作测试用例的注释中,带有文本 dimusco@yopmail.com 和盐: 123456 。这样称呼:
let salt = "123456"
if let encrypted = self.encrypt(text: "dimusco@yopmail.com", salt: salt) {
print ("encrypted: " + encrypted)
if let decrypted = self.decrypt(text: encrypted, salt: salt) {
print ("decrypted: " + decrypted)
}
}
正确的输出为:
encrypted: +rptz3Ss8zh2j0VXN7CICsi2jkzYoAPx
decrypted: dimusco@yopmail.com
我不知道您从哪里得到结果 eLnJvMUKApg = ,但这是错误的。同样,您在问题中引用的ActionScript代码也会给出结果 + rptz3Ss8zh2j0VXN7CICsi2jkzYoAPx 。
与ActionScript比较
Flex
您可以从此处下载免费的flex sdk:
https://download.macromedia.com/pub/flex/sdk/flex_sdk_4.6.zip
as3crypto库
引用的ActionScript似乎使用了一个名为as3crypto的库,可以从此处下载该文件:
https://code.google.com/archive/p/as3crypto/
Flex取决于已安装的Java环境。它似乎无法立即使用最新版本的Java,但是您可以使用Java 1.6。
您可以创建一个小的ActionScript程序,该程序调用as3crypto例程。如果文件名为Main.as,可以使用以下命令进行编译:
flex_sdk_4.6/bin/mxmlc Main.as
然后,输出为Main.swf文件,可以使用浏览器中的Flash插件执行该文件。
结果
ActionScript代码的结果与Swift代码相同,请参见此屏幕截图: