libgrabkernel2

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Easily download the kernelcache for any iOS release, beta or OTA-only version.

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# libgrabkernel2

This is a simple library to download the kernelcache, SPTM and TXM for the host iOS/macOS device. It is similar to the original [libgrabkernel](https://github.com/tihmstar/libgrabkernel) by tihmstar, but it uses the AppleDB API to find the kernelcache URL, which lets it work for beta versions of iOS/macOS as well.

libgrabkernel2 contains a compatibility shim for the original libgrabkernel's `grabkernel()` function. This means that you can swap a libgrabkernel dylib for a libgrabkernel2 one in a pre-compiled project without issues.

## Usage

Download the kernelcache for the host device:
```objc
bool result = grab_kernelcache([NSTemporaryDirectory() stringByAppendingPathComponent:@"kernel"]);
```

Download the kernelcache, SPTM and TXM for the host device:
```objc
bool result = grab_images(NSTemporaryDirectory());
```

The SPTM image will be saved as `sptm.im4p`, and the TXM image will be saved as `txm.im4p`.

## Building

Run `make` in the root directory.

- Add `TARGET=macos` for macOS (the default is iOS)
- Add `DEBUG=1` for a debug build.

The build products and headers will be in the `output` directory.

Huge credit to [dhinakg](https://github.com/dhinakg) for reimplementing the API parsing in Objective-C (as it was originally in Swift).

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