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feat: add support for zstd compressed inodes #131

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Merged
qkaiser merged 1 commit into from
Jun 16, 2026
Merged

feat: add support for zstd compressed inodes #131

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114 changes: 113 additions & 1 deletion poetry.lock
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1 change: 1 addition & 0 deletions pyproject.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ packages = [{include = "ubireader"}]
python = ">=3.10"
lzallright = "^0.2.1"
cryptography = ">=44.0.2,<47.0.0"
zstandard = "^0.25.0"

[build-system]
requires = ["poetry-core"]
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12 changes: 9 additions & 3 deletions ubireader/ubifs/misc.py
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Expand Up @@ -22,6 +22,7 @@
from lzallright import LZOCompressor
import struct
import zlib
import zstandard
from ubireader.ubifs.defines import *
from ubireader.debug import error, verbose_log
from ubireader.debug import error
Expand Down Expand Up @@ -66,9 +67,9 @@ def decompress(ctype: int, unc_len: int, data: bytes) -> bytes | None:
"""Decompress data.

Arguments:
Int:ctype -- Compression type LZO, ZLIB (*currently unused*).
Int:unc_len -- Uncompressed data lenth.
Str:data -- Data to be uncompessed.
Int:ctype -- Compression type LZO, ZLIB, or ZSTD.
Int:unc_len -- Uncompressed data length.
Str:data -- Data to be uncompressed.

Returns:
Uncompressed Data.
Expand All @@ -83,6 +84,11 @@ def decompress(ctype: int, unc_len: int, data: bytes) -> bytes | None:
return zlib.decompress(data, -11)
except Exception as e:
error(decompress, 'Warn', 'ZLib Error: %s' % e)
elif ctype == UBIFS_COMPR_ZSTD:
try:
return zstandard.decompress(data, max_output_size=unc_len)
except Exception as e:
error(decompress, 'Warn', 'ZSTD Error: %s' % e)
else:
return data

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