我试图编写一个基于CCCrypt的加密(AESCBC256)函数,CCCrypt正在生成一个随机值。
例如,当我传递1234567函数时,对于同一个iv和Key,它将返回“HlFP2rCmycZS1269Cm47Q==”或“TTuSJrBcsOmOCDHc5IQ8Dw==”。
这是静脉注射:b5f89591
关键是:366e9c1b4b2ed2b1daf751d7500aaa01
func encrypt(Value: String)->String{
let keyData = keyString.data(using: .utf8, allowLossyConversion: false)!
let iv = SecretKey.data(using: .utf8, allowLossyConversion: false)!
let message = SecretKey+Value
let data = message.data(using: .utf8, allowLossyConversion: false)!
let cryptData = NSMutableData(length: Int(data.count) + kCCBlockSizeAES128)!
let keyLength = size_t(kCCKeySizeAES256)
let operation: CCOperation = CCOperation(UInt32(kCCEncrypt))
let algoritm: CCAlgorithm = CCAlgorithm(UInt32(kCCAlgorithmAES128))
let options: CCOptions = CCOptions(UInt32(kCCOptionPKCS7Padding))
var numBytesEncrypted :size_t = 0
let cryptStatus = CCCrypt(operation,
algoritm,
options,
keyData.withUnsafeBytes { (bytes: UnsafePointer<UInt8>) -> UnsafePointer<UInt8> in return bytes},
keyLength,
iv.withUnsafeBytes { (bytes: UnsafePointer<UInt8>) -> UnsafePointer<UInt8> in return bytes},
data.withUnsafeBytes { (bytes: UnsafePointer<UInt8>) -> UnsafePointer<UInt8> in return bytes},
data.count,
cryptData.mutableBytes, cryptData.length,
&numBytesEncrypted)
if UInt32(cryptStatus) == UInt32(kCCSuccess) {
cryptData.length = Int(numBytesEncrypted)
return String(describing: cryptData.base64EncodedString(options: .lineLength64Characters))
}else{
return ""
}
}
最佳答案
你的静脉注射长度不对。它有8个字节长,但是AES需要16个字节的IV,所以它从内存中读取随机数据以存储其他8个字节。