[英]'UnsafePointer<UInt8>' is not convertible to 'UnsafePointer<_>'
I'm doing tripleDES encryption and decryption. 我正在做tripleDES加密和解密。 Getting this error:
得到此错误:
UnsafePointer<UInt8>' is not convertible to 'UnsafePointer<_>
The code where I'm getting the error is: 我收到错误的代码是:
let keyString = "25d1d4cb0a08403e2acbcbe0"
let keyData = keyString.data(using: .utf8)!
let message = pass
let data = message.data(using: .utf8)!
let cryptData = NSMutableData(length: Int(data.count) + kCCBlockSize3DES)!
let keyLength = size_t(kCCKeySize3DES)
let operation: CCOperation = UInt32(kCCEncrypt)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithm3DES)
let options: CCOptions = UInt32(kCCOptionECBMode + kCCOptionPKCS7Padding)
var numBytesEncrypted :size_t = 0
let cryptStatus = keyData.withUnsafeBytes { (keyBytes: UnsafePointer<UInt8>) in
data.withUnsafeBytes { (dataBytes: UnsafePointer<UInt8>) in
cryptData.withUnsafeMutableBytes { (cryptBytes: UnsafeMutablePointer<UInt8>) in
CCCrypt(operation,
algoritm,
options,
keyBytes,
keyLength,
nil,
dataBytes,
data.count,
cryptBytes,
cryptData.count,
&numBytesEncrypted)
}
}
}
Anyone could help? 有人可以帮忙吗?
This error message is the result of a sort of compiler bug: the compiler cannot compile the code and emits an invalid and misleading error message. 此错误消息是一种编译器错误的结果:编译器无法编译代码并发出无效且误导性的错误消息。 Also see https://bugs.swift.org/browse/SR-5931
另请参阅https://bugs.swift.org/browse/SR-5931
In most cases, you can: 在大多数情况下,您可以:
<UInt8>
) to reveal the real cause <UInt8>
)以显示真正的原因 let keyString = "25d1d4cb0a08403e2acbcbe0"
let keyData = keyString.data(using: .utf8)!
let message = pass
let data = message.data(using: .utf8)!
let cryptData = NSMutableData(length: Int(data.count) + kCCBlockSize3DES)!
let keyLength = size_t(kCCKeySize3DES)
let operation: CCOperation = UInt32(kCCEncrypt)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithm3DES)
let options: CCOptions = UInt32(kCCOptionECBMode + kCCOptionPKCS7Padding)
var numBytesEncrypted :size_t = 0
let cryptStatus = keyData.withUnsafeBytes { (keyBytes: UnsafePointer<UInt8>) in
data.withUnsafeBytes { (dataBytes: UnsafePointer<UInt8>) in
cryptData.withUnsafeMutableBytes { (cryptBytes: UnsafeMutablePointer<UInt8>) in
CCCrypt(operation,
algoritm,
options,
keyBytes,
keyLength,
nil,
dataBytes,
data.count,
&cryptBytes, //<-----try to do this
cryptData.count,
&numBytesEncrypted)
}
}
}
cryptData
is a NSMutableData object, so it has mutableBytes
to work with. cryptData
是一个NSMutableData对象,因此它有mutableBytes
可以使用。
How about: 怎么样:
let keyString = "25d1d4cb0a08403e2acbcbe0"
let keyData = keyString.data(using: .utf8)!
let message = pass
let data = message.data(using: .utf8)!
let cryptData = NSMutableData(length: Int(data.count) + kCCBlockSize3DES)!
let keyLength = size_t(kCCKeySize3DES)
let operation: CCOperation = UInt32(kCCEncrypt)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithm3DES)
let options: CCOptions = UInt32(kCCOptionECBMode + kCCOptionPKCS7Padding)
var numBytesEncrypted :size_t = 0
let cryptStatus = keyData.withUnsafeBytes { (keyBytes : UnsafePointer<UInt8>) in
data.withUnsafeBytes { (dataBytes : UnsafePointer<UInt8>) in
CCCrypt(operation,
algoritm,
options,
keyBytes,
keyLength,
nil,
dataBytes,
data.count,
cryptData.mutableBytes,
cryptData.length,
&numBytesEncrypted)
}
}
if UInt32(cryptStatus) == UInt32(kCCSuccess) {
print("success!")
}
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