I am trying to read certificates from various URLs in iOS. My code however is not working well - the array that should return the information I need always returns null.

What am I missing?

- (void)findCertificate:(NSString *)url
{
    NSInputStream*input = [[NSInputStream inputStreamWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"https://store.writeitstudios.com"]]] retain];

    [input setDelegate:self];

    [input scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode];

    [input open];

    NSLog(@"Status: %i",[input streamStatus]);
}

- (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode
{
    NSLog(@"handle Event: %i",eventCode);

    if (eventCode == NSStreamStatusOpen)
    {
        NSArray *certificates = (NSArray*)CFReadStreamCopyProperty((CFReadStreamRef)aStream, kCFStreamPropertySSLPeerCertificates); 

        NSLog(@"Certs: %@",CFReadStreamCopyProperty((CFReadStreamRef)aStream, kCFStreamPropertySSLPeerCertificates));

        if ([certificates count] > 0) { 
            SecCertificateRef certificate = (SecCertificateRef)[certificates objectAtIndex:0]; 
            NSString *description = (NSString*)SecCertificateCopySubjectSummary(certificate); 
            NSData *data = (NSData *)SecCertificateCopyData(certificate); 
            NSLog(@"Description: %@",description);
        }
    }
}

And yes, I am aware that I am leaking memory. This is just a snippet.