Download Hacking and Securing iOS Applications: Stealing Data, by Jonathan Zdziarski PDF

By Jonathan Zdziarski

If you’re an app developer with an outstanding origin in Objective-C, this e-book is an absolute must—chances are very excessive that your company’s iOS functions are liable to assault. That’s simply because malicious attackers now use an arsenal of instruments to reverse-engineer, hint, and manage functions in ways in which such a lot programmers aren’t acutely aware of.

This advisor illustrates different types of iOS assaults, in addition to the instruments and strategies that hackers use. You’ll research top practices to assist safeguard your purposes, and notice how very important it really is to appreciate and strategize like your adversary.

* research sophisticated vulnerabilities in real-world applications—and steer clear of an identical difficulties on your apps
* find out how attackers infect apps with malware via code injection
* realize how attackers defeat iOS keychain and data-protection encryption
* Use a debugger and customized code injection to govern the runtime Objective-C setting
* hinder attackers from hijacking SSL periods and stealing site visitors
* Securely delete records and layout your apps to avoid forensic facts leakage
* keep away from debugging abuse, validate the integrity of run-time sessions, and make your code more durable to track

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Additional resources for Hacking and Securing iOS Applications: Stealing Data, Hijacking Software, and How to Prevent It

Example text

Your version of launchd will be responsible for, at a minimum, checking and mounting the device’s disks, and can then perform whatever operations you’re interested in performing. These could include brute force cracking the PIN on the device, copying files to or from the device, and so on. To build a working launchd binary, you’ll need the following: 38 | Chapter 2: The Basics of Compromising iOS • System calls, since Apple’s libraries containing these can’t be legally distributed with your program, and the device’s preloaded libraries won’t be available until after the root filesystem is mounted • Basic code to check and mount the filesystem • Xcode tools and a link identity editor to code-sign binaries System calls will be the first issue to tackle.

Ensure your device is booted into the operating system. The user interface does not need to be unlocked. The device can be at a passcode prompt, a slide-to-unlock screen, the home screen, or anywhere else, so long as the device is running. 2. Hold down the Power button until a Slide to Power Off prompt appears. Slide the slider to power down the device. An activity indicator will begin spinning and the device’s screen will eventually power down. 3. Within one second after the screen goes dark, begin the DFU mode key sequence: immediately press the Home and Power buttons together for 10 seconds, then release the Power button and continue holding the Home button for another 10 seconds.

The device will power off near the middle of the 10 second period. 3. Release the Power button while continuing to hold down the Home button for another 10 seconds. 4. Confirm the device is in DFU mode either by using System Profiler or by allowing redsn0w to auto-detect the device. Tethered Versus Untethered Depending on the model of the device and the version of iOS running on it, jailbreaking tools perform one of two types of jailbreaks: tethered and untethered. An untethered jailbreak means that the device can be rebooted and still retain its jailbroken state.

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