ios - 使用 ARC 的安全框架内存泄漏

Question

在为 ASIHTTPRequest 打开 p12 证书时，我遇到了内存泄漏。这是我获得证书的代码：

- (SecIdentityRef)getClientCertificate {
    SecIdentityRef identityApp = nil;
    NSString *thePath = [[NSBundle mainBundle] pathForResource:@"myCert" ofType:@"p12"];
    NSData *PKCS12Data = [[NSData alloc] initWithContentsOfFile:thePath];
    CFDataRef inPKCS12Data = (__bridge CFDataRef)PKCS12Data;
    CFStringRef password = CFSTR("myPassword");
    const void *keys[] = { kSecImportExportPassphrase };
    const void *values[] = { password };
    CFDictionaryRef options = CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL);
    CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL);
    OSStatus securityError = SecPKCS12Import(inPKCS12Data, options, &items);
    CFRelease(options);
    CFRelease(password);
    if (securityError == errSecSuccess) {
        NSLog(@"Success opening p12 certificate. Items: %ld", CFArrayGetCount(items));
        CFDictionaryRef identityDict = CFArrayGetValueAtIndex(items, 0);
        identityApp = (SecIdentityRef)CFDictionaryGetValue(identityDict, kSecImportItemIdentity);        
    } else {
        NSLog(@"Error opening Certificate.");
    }
    return identityApp;
}

正如您在此处看到的，它会产生内存泄漏：

或者，这个其他函数（基本相同）会产生其他类型的内存泄漏：

- (SecIdentityRef)getClientCertificate2 {
    SecIdentityRef identityApp = nil;
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *thePath = [documentsDirectory stringByAppendingPathComponent:@"myothercert.p12"];

    NSData *PKCS12Data = [[NSData alloc] initWithContentsOfFile:thePath];
    NSLog(@"PKCS12Data length is %i", [PKCS12Data length]);
    CFDataRef inPKCS12Data = (__bridge CFDataRef)PKCS12Data;

    CFStringRef password = CFSTR("randomgenerated");
    const void *keys[] = { kSecImportExportPassphrase };
    const void *values[] = { password };
    CFDictionaryRef options = CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL);
    CFArrayRef items = CFArrayCreate(NULL, 0, 0, NULL);
    OSStatus securityError = SecPKCS12Import(inPKCS12Data, options, &items);
     CFRelease(options);
    //CFRelease(password);
    if (securityError == errSecSuccess) {
        NSLog(@"Success opening p12 certificate. Items: %ld", CFArrayGetCount(items));
        CFDictionaryRef identityDict = CFArrayGetValueAtIndex(items, 0);
        identityApp = (SecIdentityRef)CFDictionaryGetValue(identityDict, kSecImportItemIdentity);
    } else {
        NSLog(@"Error opening Certificate.");
    }
    return identityApp;
}

这会产生这些内存泄漏：

是什么导致了这些内存泄漏？该代码可以正常打开 p12 文件，但我需要修复内存泄漏。任何帮助表示赞赏。

谢谢！

编辑

通过建议的更改，我仍然收到内存泄漏：

- (SecIdentityRef)copyClientCertificate2 {
SecIdentityRef identityApp = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *thePath = [documentsDirectory stringByAppendingPathComponent:@"cert.p12"];

NSData *PKCS12Data = [[NSData alloc] initWithContentsOfFile:thePath];
NSLog(@"PKCS12Data length is %i", [PKCS12Data length]);


CFStringRef password = CFSTR("randomgenerated");
const void *keys[] = { kSecImportExportPassphrase };
const void *values[] = { password };
CFDictionaryRef options = CFDictionaryCreate(NULL, keys, values, 1, NULL, NULL);
CFArrayRef items = NULL;
OSStatus securityError = SecPKCS12Import((__bridge CFDataRef)PKCS12Data, options, &items);
 CFRelease(options);
//CFRelease(password);
if (securityError == errSecSuccess) {
    NSLog(@"Success opening p12 certificate. Items: %ld", CFArrayGetCount(items));
    CFDictionaryRef identityDict = CFArrayGetValueAtIndex(items, 0);
    identityApp = (SecIdentityRef)CFDictionaryGetValue(identityDict, kSecImportItemIdentity);
} else {
    NSLog(@"Error opening Certificate.");
}
CFRetain(identityApp);
return identityApp;

}

Answer 1