问题描述
我真的需要一些帮助，使用 CryptoSwift 将目标c代码转换为swift。
我不知道如何使用如下功能： bzero ， getCString ， static NSString * key = @BitCave012345678;
char keyPtr [kCCKeySizeAES128 + 1];
bzero（keyPtr，sizeof（keyPtr））;
[key getCString：keyPtr maxLength：sizeof（keyPtr）encoding：NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void * buffer = malloc（bufferSize）;
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt（kCCEncrypt，kCCAlgorithmAES128，kCCOptionECBMode，
keyPtr，kCCKeySizeAES128，NULL，[data bytes]，dataLength，
buffer，bufferSize，& numBytesEncrypted）
if（cryptStatus == kCCSuccess）
{
return [NSData dataWithBytesNoCopy：buffer length：numBytesEncrypted];
}
free（buffer）;
return nil;
}
有没有人有一个想法如何满足需要指针的参数？
我正在尝试使用 UnsafeMutablePointers ，我也尝试了下面的代码，但我知道这是完全错误的：
var key：NSString =BitCave012345678
var keyPtr：Array< Character> = Array< Character>（count：17，repeatedValue：0）
bzero（& keyPtr，17 * sizeof（Character））
key.getCString（& keyPtr，maxLength：17 * sizeof （字符），编码：NSUTF8StringEncoding）
Swift 2.0
没有必要使用bzero，getCString，malloc，这里不是一个例子：
添加项目的安全性
将#import添加到桥接头。
//操作是'kCCEncrypt'或'kCCDecrypt'
func testCrypt（data data：NSData，keyData：NSData，operation：Int） - > NSData的？ {
let keyBytes = UnsafePointer< UInt8>（keyData.bytes）
let dataLength = Int（data.length）
let dataBytes = UnsafePointer< UInt8>（data.bytes）
让cryptData：NSMutableData！ = NSMutableData（length：Int（dataLength）+ kCCBlockSizeAES128）
let cryptPointer = UnsafeMutablePointer< UInt8>（cryptData.mutableBytes）
let cryptLength = size_t（cryptData.length）
let keyLength = size_t（kCCKeySizeAES128）
let algorithmit：CCAlgorithm = UInt32（kCCAlgorithmAES128）
let options：CCOptions = UInt32（kCCOptionECBMode + kCCOptionPKCS7Padding）
var numBytesEncrypted：size_t = 0
let cryptStatus = CCCrypt（CCOperation（operation），
algoritm，
options，
keyBytes，keyLength，
nil，
dataBytes，dataLength，
cryptPointer，cryptLength，
& numBytesEncrypted）
如果UInt32（cryptStatus）== UInt32（kCCSuccess）{
cryptData.length = Int（numBytesEncrypted）
} else {
print（Error：\（cryptStatus））
}
return cryptData;
}
使用示例：
let keyData =12345678901234567890123456789012.dataUsingEncoding（NSUTF8StringEncoding）
let messageData =不要尝试阅读这个文本顶级秘密资料.dataUsingEncoding（NSUTF8StringEncoding）
let encrypted = testCrypt（data：messageData !, keyData：keyData !, operation：kCCEncrypt）
这里是Swift的版本数组的UInt8没有 NSData 对象：
$ b $ func testCrypt（data data：[UInt8]，keyData：[UInt8]，operation：Int） - > [UINT8]？ {
let keyBytes = UnsafeMutablePointer< UInt8>（keyData）
让dataLength = data.count
让dataBytes = UnsafeMutablePointer< UInt8&（）数据
var cryptData = [UInt8]（count：data.count + kCCBlockSizeAES128，repeatedValue：0）
let cryptPointer = UnsafeMutablePointer< UInt8>（cryptData）
let cryptLength = size_t（cryptData.count）
let keyLength = size_t（kCCKeySizeAES128）
let algorithmit：CCAlgorithm = UInt32（kCCAlgorithmAES128）
let options：CCOptions = UInt32（kCCOptionECBMode + kCCOptionPKCS7Padding）
var numBytesEncrypted ：size_t = 0
let cryptStatus = CCCrypt（CCOperation（operation），
algoritm，
options，
keyBytes，keyLength，
nil，
dataBytes，dataLength，
cryptPointer，cryptLength，
& numBytesEncrypted）
如果UInt32（cryptStatus）== UInt32（kCCSuccess） {
cryptData.removeRange（numBytesEncrypted ..< cryptData.count）
} else {
print（Error：\（cryptStatus））
}
return cryptData;
}
使用示例：
let keyData = Array（12345678901234567890123456789012.utf8）
let messageData = Array（不要尝试阅读这个文本顶级秘密的东西.utf8）
let encrypted = testCrypt（data：messageData，keyData：keyData，operation：kCCEncrypt）
I really need some help to convert the objective-c code to swift using CryptoSwift.I'm not sure how to use functions like: bzero, getCString, malloc in Swift.
+(NSData*)encryptData:(NSData*)data
{
static NSString *key = @"BitCave012345678";
char keyPtr[kCCKeySizeAES128+1];
bzero(keyPtr, sizeof(keyPtr));
[key getCString:keyPtr maxLength:sizeof(keyPtr) encoding:NSUTF8StringEncoding];
NSUInteger dataLength = [data length];
size_t bufferSize = dataLength + kCCBlockSizeAES128;
void *buffer = malloc(bufferSize);
size_t numBytesEncrypted = 0;
CCCryptorStatus cryptStatus = CCCrypt(kCCEncrypt, kCCAlgorithmAES128, kCCOptionECBMode,
keyPtr,kCCKeySizeAES128,NULL,[data bytes],dataLength,
buffer, bufferSize, &numBytesEncrypted);
if(cryptStatus == kCCSuccess)
{
return [NSData dataWithBytesNoCopy:buffer length:numBytesEncrypted];
}
free(buffer);
return nil;
}
Does anyone has an idea how to satisfy arguments requiring pointers?I was trying using UnsafeMutablePointers and I also tried the code below, but I know it is completely wrong:
var key: NSString = "BitCave012345678"
var keyPtr: Array<Character> = Array<Character>(count: 17, repeatedValue: "0")
bzero(&keyPtr, 17*sizeof(Character))
key.getCString(&keyPtr, maxLength: 17*sizeof(Character), encoding: NSUTF8StringEncoding)
Swift 2.0
It is not necessary to use bzero, getCString, malloc, here is an example that does not:
Add Security.framework to the project
Add #import to the bridging header.
// operation is either 'kCCEncrypt' or 'kCCDecrypt'
func testCrypt(data data:NSData, keyData:NSData, operation:Int) -> NSData? {
let keyBytes = UnsafePointer<UInt8>(keyData.bytes)
let dataLength = Int(data.length)
let dataBytes = UnsafePointer<UInt8>(data.bytes)
let cryptData: NSMutableData! = NSMutableData(length: Int(dataLength) + kCCBlockSizeAES128)
let cryptPointer = UnsafeMutablePointer<UInt8>(cryptData.mutableBytes)
let cryptLength = size_t(cryptData.length)
let keyLength = size_t(kCCKeySizeAES128)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithmAES128)
let options: CCOptions = UInt32(kCCOptionECBMode + kCCOptionPKCS7Padding)
var numBytesEncrypted :size_t = 0
let cryptStatus = CCCrypt(CCOperation(operation),
algoritm,
options,
keyBytes, keyLength,
nil,
dataBytes, dataLength,
cryptPointer, cryptLength,
&numBytesEncrypted)
if UInt32(cryptStatus) == UInt32(kCCSuccess) {
cryptData.length = Int(numBytesEncrypted)
} else {
print("Error: \(cryptStatus)")
}
return cryptData;
}
Example usage:
let keyData = "12345678901234567890123456789012".dataUsingEncoding(NSUTF8StringEncoding)
let messageData = "Don´t try to read this text. Top Secret Stuff".dataUsingEncoding(NSUTF8StringEncoding)
let encrypted = testCrypt(data:messageData!, keyData:keyData!, operation:kCCEncrypt)
Here is version in Swift Arrays of UInt8 with no NSData objects:
func testCrypt(data data:[UInt8], keyData:[UInt8], operation:Int) -> [UInt8]? {
let keyBytes = UnsafeMutablePointer<UInt8>(keyData)
let dataLength = data.count
let dataBytes = UnsafeMutablePointer<UInt8>(data)
var cryptData = [UInt8](count:data.count+kCCBlockSizeAES128, repeatedValue:0)
let cryptPointer = UnsafeMutablePointer<UInt8>(cryptData)
let cryptLength = size_t(cryptData.count)
let keyLength = size_t(kCCKeySizeAES128)
let algoritm: CCAlgorithm = UInt32(kCCAlgorithmAES128)
let options: CCOptions = UInt32(kCCOptionECBMode + kCCOptionPKCS7Padding)
var numBytesEncrypted :size_t = 0
let cryptStatus = CCCrypt(CCOperation(operation),
algoritm,
options,
keyBytes, keyLength,
nil,
dataBytes, dataLength,
cryptPointer, cryptLength,
&numBytesEncrypted)
if UInt32(cryptStatus) == UInt32(kCCSuccess) {
cryptData.removeRange(numBytesEncrypted..<cryptData.count)
} else {
print("Error: \(cryptStatus)")
}
return cryptData;
}
Example usage:
let keyData = Array("12345678901234567890123456789012".utf8)
let messageData = Array("Don´t try to read this text. Top Secret Stuff".utf8)
let encrypted = testCrypt(data:messageData, keyData:keyData, operation:kCCEncrypt)
这篇关于CryptoSwift，将Objective-C代码转换成swift的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！