Macos SWIFT4中AES解密产生空值
我使用一个扩展方法来解密一个字符串,该字符串由服务器端php脚本使用AES算法加密 下面是使用的扩展方法Macos SWIFT4中AES解密产生空值,macos,encryption,swift4,Macos,Encryption,Swift4,我使用一个扩展方法来解密一个字符串,该字符串由服务器端php脚本使用AES算法加密 下面是使用的扩展方法 func aesDecrypt(key:String, iv:String, options:Int = kCCOptionPKCS7Padding) -> String? { if let keyData = key.data(using: String.Encoding.utf8), let data = NSData(base64Encod
func aesDecrypt(key:String, iv:String, options:Int = kCCOptionPKCS7Padding) -> String? {
if let keyData = key.data(using: String.Encoding.utf8),
let data = NSData(base64Encoded: self, options: .ignoreUnknownCharacters),
let cryptData = NSMutableData(length: Int((data.length)) + kCCBlockSizeAES128) {
let keyLength = size_t(kCCKeySizeAES128)
let operation: CCOperation = UInt32(kCCDecrypt)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithmAES128)
let options: CCOptions = UInt32(options)
var numBytesEncrypted :size_t = 0
let cryptStatus = CCCrypt(operation,
algoritm,
options,
(keyData as NSData).bytes, keyLength,
iv,
data.bytes, data.length,
cryptData.mutableBytes, cryptData.length,
&numBytesEncrypted)
if UInt32(cryptStatus) == UInt32(kCCSuccess) {
cryptData.length = Int(numBytesEncrypted)
let unencryptedMessage = String(data: cryptData as Data, encoding:String.Encoding.utf8)
return unencryptedMessage
}
else {
return nil
}
}
return nil
}
这有时返回空值
unencode = responseString?.aesDecrypt(key: "mykey", iv: "value");
我无法找出发生这种情况的确切原因。发生这种情况时responseString不是空的
请注意您是否总是使用相同的密钥(如果是,长度是多少)和相同的iv?发生时cryptStatus的值是多少?我已将此代码替换为cryptoswift,感谢您的帮助。您是否仍在寻找此问题的解决方案???