将目标c中的4行代码转换为swift(指针)

Question

自从两天将一段代码从Objective-C翻译成Swift以来,我一直陷入困境:

CFArrayRef keyref = NULL;
CFDictionaryRef identityDict = CFArrayGetValueAtIndex(keyref, 0);
SecIdentityRef identityRef = (SecIdentityRef)CFDictionaryGetValue(identityDict,      kSecImportItemIdentity);

是的,就是这样!我根本无法用这些指针来满足编译器.请帮忙 :-)

这是要翻译的整个目标c代码:

// Read .p12 file
NSString *path = [[NSBundle mainBundle] pathForResource:@"SSLKeyStoreClient" ofType:@"p12"];
NSData *pkcs12data = [[NSData alloc] initWithContentsOfFile:path];

// Import .p12 data
CFArrayRef keyref = NULL;
OSStatus sanityChesk = SecPKCS12Import((__bridge CFDataRef)pkcs12data,
                                       (__bridge CFDictionaryRef)[NSDictionary
                                                                  dictionaryWithObject:@"wed-zzz"
                                                                  forKey:(__bridge id)kSecImportExportPassphrase],
                                       &keyref);
if (sanityChesk != noErr) {
    NSLog(@"Error while importing pkcs12 [%d]", (int)sanityChesk);
} else
    NSLog(@"Success opening p12 certificate.");

// Identity
CFDictionaryRef identityDict = CFArrayGetValueAtIndex(keyref, 0);
SecIdentityRef identityRef = (SecIdentityRef)CFDictionaryGetValue(identityDict,
                                                                  kSecImportItemIdentity);

// Cert
SecCertificateRef cert = NULL;
OSStatus status = SecIdentityCopyCertificate(identityRef, &cert);
if (status)
    NSLog(@"SecIdentityCopyCertificate failed.");

// the certificates array, containing the identity then the root certificate
NSArray *myCerts = [[NSArray alloc] initWithObjects:(__bridge id)identityRef, (__bridge id)cert, nil];

NSMutableDictionary *SSLOptions;
[SSLOptions setObject:[NSNumber numberWithBool:YES] forKey:(NSString *)kCFStreamSSLAllowsExpiredRoots];

NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys:
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsExpiredCertificates,
                          [NSNumber numberWithBool:YES], kCFStreamSSLAllowsAnyRoot,
                          [NSNumber numberWithBool:NO], kCFStreamSSLValidatesCertificateChain,
                          kCFNull,kCFStreamSSLPeerName,
                          myCerts,kCFStreamSSLCertificates,
                          nil];


CFReadStreamSetProperty((CFReadStreamRef)self.inputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);
CFWriteStreamSetProperty((CFWriteStreamRef)self.outputStream, kCFStreamPropertySSLSettings, (CFTypeRef)settings);

这就是我到目前为止所得到的:

// Read .p12 file
var path = NSBundle.mainBundle().pathForResource("SSLKeyStoreClient", ofType: "p12")
var pkcs12data: NSData = NSData.dataWithContentsOfFile(path, options: nil, error: nil)

// Import .p12 data
var keyref: Unmanaged<CFArray>?


var optionDict: NSMutableDictionary = NSMutableDictionary()
optionDict.setValue("wed-zzz", forKey: kSecImportExportPassphrase!.takeRetainedValue())

var sanityChesk = SecPKCS12Import(pkcs12data,optionDict,&keyref)
if sanityChesk != 0{ //noErr
   println("Error while importing pkcs12 \(sanityChesk)")
} else {
   println("Success opening p12 certificate.")
}


// Identity
var key = keyref!
var identityDict: CFDictionary = CFArrayGetValueAtIndex(keyref, 0)
var identityRef:COpaquePointer = CFDictionaryGetValue(identityDict,nil)


// Cert
var cert: Unmanaged<SecCertificate>?
var status: OSStatus  = SecIdentityCopyCertificate(identityRef, &cert)
if status == 0{
    println("SecIdentityCopyCertificate failed.")
}

// the certificates array, containing the identity then the root certificate
var sslOptions = Dictionary<NSObject, NSObject>()

sslOptions[kCFStreamSSLAllowsExpiredRoots] = NSNumber.numberWithBool(true)

var settings = Dictionary<NSObject, NSObject>()
settings[kCFStreamSSLAllowsExpiredCertificates] = NSNumber.numberWithBool(true)
settings[kCFStreamSSLAllowsAnyRoot] = NSNumber.numberWithBool(true)
settings[kCFStreamSSLValidatesCertificateChain] = NSNumber.numberWithBool(false)
settings[kCFStreamSSLPeerName] = kCFNull
//settings[kCFStreamSSLCertificates] = myCerts



    CFReadStreamSetProperty(self.inputStream, kCFStreamPropertySSLSettings, settings)
    CFReadStreamSetProperty(self.inputStream, kCFStreamPropertySSLSettings, settings)

问题始于:

var identityDict: CFDictionary = CFArrayGetValueAtIndex(keyref, 0)

错误:"非托管CFArray无法转换为CFArray".

到目前为止,这是我最好的尝试.

Answer 1

大概第一行是实际数组的占位符？如果您实际上正在使用NULL数组指针，则其余代码不会执行任何操作。

\n\n

假设您从真实的 开始CFArrayRef，您可以利用桥接：CoreFoundation 类型会自动被视为 Swift 对象，因此您不需要使用CFArrayRef和CFDictionaryRef指针。这同样适用于使用 CF 类型系统的任何其他 C API，因此它也应该适用于SecIdentity.

\n\n

自动桥接 CF 集合 \xe2\x80\x94 似乎有些奇怪，您可以隐式将 a 桥接到CFArrayan NSArray，将NSArrayan 桥接到 Swift Array<T>，您不能只为 a 加上下标CFArray。

\n\n

所以你的转换看起来像这样（包装在处理你假设的数组的函数中）：

\n\n

func getIdentity(keychainArray: NSArray) -> SecIdentity? {\n    let dict = keychainArray[0] as Dictionary<String,AnyObject>\n    let key = kSecImportItemIdentity.takeRetainedValue()\n    return dict[key] as SecIdentity?\n}\n

\n\n

如果你有 a ，CFArray你可以将它传递给这个函数，它会自动桥接/转换为NSArray，然后自动转换为 Swift 数组以进行下标。将第 0 项视为 Swift 字典，您可以为字典添加下标以获取恒等式。对于密钥，您需要将其从 an 中取出Unmanaged<CFString>，因为安全框架未设置用于该常量声明的隐式桥接。

\n\n

我让这个函数返回一个可选值，因为我不知道您传入的数组+字典是否实际上包含一个标识。如果你确定是这样，你可以去掉两个问号。

\n\n

（这在操场上编译，但我没有一个包含字典的数组，该字典包含方便测试的身份，所以买者自负。）

\n