Protect iPhone app from hackers

Question

I'm developing some iPhone application and I'm very frustrated when some of my applications published on hacked app resources. And anyone can install those apps for free.

So my question is: How to protect application from dumping into memory, running in debug mode and making hacked ipsw bundle? Is there source examples for that?

Answer 1

I've used AntiCrack for all our products. Admittedly, I'm still using version 1: at the time it was free but were encouraged to make a donation (and I duly did). And to be honest it's great. Very easy to integrate.

Of course, it's a real battle, and nothing's perfect, but AntiCrack certainly helped to prevent a whole set of common cracking approaches. Of course, many are documented all over the web, it would have taken far longer for me to implement and test than just shell out a few dollars.

Version 2 looks like it's even better, although there is now a compulsory donation of at least $30, which is still a bargain.

Answer 2

i found this source snippet as example of isCracked function

#if HEARTBEAT_CHECK_PIRACY
+ (BOOL)isCracked {
#if TARGET_IPHONE_SIMULATOR
    return NO;
#else
    static BOOL isCracked = NO;
    static BOOL didCheck = NO;
    if(didCheck) return isCracked;

#if HEARTBEAT_PIRACY_THRESHOLD >= 1
    if([[[NSBundle mainBundle] infoDictionary] objectForKey:@"SignerIdentity"] != nil) {
        #if HEARTBEAT_PIRACY_THRESHOLD >= 2
        NSString* infoPath = [[NSBundle mainBundle] pathForResource:@"Info" ofType:@"plist"];
        if([[NSString stringWithContentsOfFile:infoPath encoding:NSUTF8StringEncoding error:NULL] rangeOfString:@"</plist>"].location != NSNotFound) {
            #if HEARTBEAT_PIRACY_THRESHOLD >= 3
            NSDate* infoModifiedDate = [[[NSFileManager defaultManager] fileAttributesAtPath:infoPath traverseLink:YES] fileModificationDate];
            NSDate* pkgInfoModifiedDate = [[[NSFileManager defaultManager] fileAttributesAtPath:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"PkgInfo"] traverseLink:YES] fileModificationDate];
            if([infoModifiedDate timeIntervalSinceReferenceDate] > [pkgInfoModifiedDate timeIntervalSinceReferenceDate]) {      
            #endif
        #endif
                isCracked = YES;
        #if HEARTBEAT_PIRACY_THRESHOLD >= 2
            #if HEARTBEAT_PIRACY_THRESHOLD >= 3
            }
            #endif
        }
        #endif
    }   
#endif

    didCheck = YES;

    return isCracked;
#endif
}
#endif