Add jzlzma (Ingenic LZ77) detection and extraction#957
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Detects the mark_rootfs_lzma wrapper (magic 0x27051956) used by Ingenic T10/T20/T30/Zeratul/etc SoC firmware for kernel and rootfs images. - src/signatures/jzlzma.rs: magic + parser - src/structures/jzlzma.rs: header struct parsing - src/extractors/jzlzma.rs: internal extractor using embedded Python script - scripts/jzlzma/jzlzma_decompress.py: decompressor (supports wrapped, raw, and standard LZMA Alone formats) - cliparser.rs: fix num_args 1.. to 1 for -x/-y (was eating positional arg) Signed-off-by: CapnRon <capnron@users.noreply.github.com>
Previously the uImage extractor only carved the payload to disk when the data CRC matched. Some uImages have a valid header but a mismatched data CRC (e.g. when the payload uses a different compression than the header claims). This change warns on CRC mismatch but still carves the data.
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If you like a firmware to test, one is located here with a jzlzma kernel uimage. Another new firmware with a jzlzma rootfs should be added soon that I can link to then https://github.com/themactep/ipc-firmware/blob/master/wansview_a1-t23zn-atbm6461-stock.bin |
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here is a firmware with lzjzma rootfs https://github.com/themactep/ipc-firmware/blob/master/kiwibit_bc111-t23zn-unk-aiw4211l-virgin.bin |
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Adds support for the Ingenic LZ77 variant used in T10/T20/T30/Zeratul SoC firmware for kernel and rootfs images.
Detects the
mark_rootfs_lzmawrapper header (magic0x27051956) and extracts using an embedded Python decompressor that handles wrapped, raw, and standard LZMA Alone formats.Fixes a minor clap bug in
-x/-yflags (num_args = 1..was eating the positional file argument).