Add support for packing and unpacking Android sparse images #347
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This supports all features of Android sparse images, including holes, and CRC32 (both full image checksum and CRC32 chunks). Partial sparse images, like those included in GrapheneOS' new optimized factory images, can also be packed and unpacked with these new commands, unlike AOSP's simg2img and img2simg tools. This new functionality is not relevant for avbroot's main use case, but is useful for unpacking certain factory images for comparison with OTAs during troubleshooting. Signed-off-by: Andrew Gunnerson <[email protected]>
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Sep 1, 2024
Signed-off-by: Andrew Gunnerson <[email protected]>
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This supports all features of Android sparse images, including holes, and CRC32 (both full image checksum and CRC32 chunks).
Partial sparse images, like those included in GrapheneOS' new optimized factory images, can also be packed and unpacked with these new commands, unlike AOSP's simg2img and img2simg tools.
This new functionality is not relevant for avbroot's main use case, but is useful for unpacking certain factory images for comparison with OTAs during troubleshooting.