cccrypt 在 swift 4 中生成奇怪的输出
cccrypt is generating strange output in swift 4
我尝试编写一个基于 CCCrypt 的加密 (AESCBC256) 函数,而 CCCrypt 正在生成一个随机值。
例如,当我将 1234567 传递给函数时,对于相同的 iv 和密钥,它将 return "HlFP2rCmycZS1269Cm47Q==" 或 "TTuSJrBcsOmOCDHc5IQ8Dw=="。
这是 iv: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 ""
}
}
您的 IV 长度错误。它有 8 个字节长,但 AES 需要一个 16 字节的 IV,因此它正在从内存中读取其他 8 个字节的随机数据。
我尝试编写一个基于 CCCrypt 的加密 (AESCBC256) 函数,而 CCCrypt 正在生成一个随机值。
例如,当我将 1234567 传递给函数时,对于相同的 iv 和密钥,它将 return "HlFP2rCmycZS1269Cm47Q==" 或 "TTuSJrBcsOmOCDHc5IQ8Dw=="。
这是 iv: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 ""
}
}
您的 IV 长度错误。它有 8 个字节长,但 AES 需要一个 16 字节的 IV,因此它正在从内存中读取其他 8 个字节的随机数据。