Encryption CCCrypt返回nil的最大时间。加密有什么问题
我试图基于CCCrypt编写一个加密(AESCBC128)函数,而CCCrypt正在生成一个随机值 例如,当我将016768821221传递给函数时,对于相同的iv和键,它将返回“0oTPFcKNWABTpBGgLlzsjw==” 这是第四个:“哈巴巴布”,关键是:“哈巴巴布” 为什么它返回零。加密是正确的,但有时返回nilEncryption CCCrypt返回nil的最大时间。加密有什么问题,encryption,swift4,aes,cryptoswift,Encryption,Swift4,Aes,Cryptoswift,我试图基于CCCrypt编写一个加密(AESCBC128)函数,而CCCrypt正在生成一个随机值 例如,当我将016768821221传递给函数时,对于相同的iv和键,它将返回“0oTPFcKNWABTpBGgLlzsjw==” 这是第四个:“哈巴巴布”,关键是:“哈巴巴布” 为什么它返回零。加密是正确的,但有时返回nil extension String { func aesEncrypt(key:String, iv:String, options:Int = kCCOptionPKCS
extension String {
func aesEncrypt(key:String, iv:String, options:Int = kCCOptionPKCS7Padding) -> String? {
if let keyData = key.data(using: String.Encoding.utf8),
let data = self.data(using: String.Encoding.utf8),
let cryptData = NSMutableData(length: Int((data.count)) + kCCBlockSizeAES128) {
let keyLength = kCCKeySizeAES128
let operation: CCOperation = UInt32(kCCEncrypt)
let algoritm: CCAlgorithm = CCOptions(kCCAlgorithmAES128)
let options: CCOptions = UInt32(options)
var numBytesEncrypted :size_t = 0
let cryptStatus = CCCrypt(operation,
algoritm,
CCOptions(options),
(keyData as NSData).bytes, keyLength,
iv,
(data as NSData).bytes, data.count,
cryptData.mutableBytes, cryptData.length,
&numBytesEncrypted)
print(String(data: data, encoding: .utf8) as Any)
if UInt32(cryptStatus) == UInt32(kCCSuccess) {
cryptData.length = Int(numBytesEncrypted)
let base64cryptString = cryptData.base64EncodedString(options: .lineLength64Characters)
print("succccc")
return base64cryptString
}
else {
print("nill nill llllllllll")
return nil
}
}
return nil
}
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
}
您的
aesncrypt
始终将16的keyelength
传递给CCCrypt
,而不检查密钥是否实际具有至少16字节的数据。您的aesnypt
始终将16的keyelength
传递给CCCrypt
,而不检查密钥是否实际具有至少16字节的数据数据。键长正常返回成功70%时间,但有时返回零键长正常返回成功70%时间,有时返回零