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UEFIExtractor: Fix detection of modern 32 MB images

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RichardG867
2023-04-13 19:33:14 -03:00
parent 6a55c70b1e
commit d0c0c0dbe1
1 changed files with 3 additions and 3 deletions
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6
biostools/extractors.py
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@@ -2569,7 +2569,7 @@ class UEFIExtractor(Extractor):
super().__init__(*args, **kwargs)
# Known UEFI signatures.
self._signature_pattern = re.compile(b'''EFI_|D(?:xe|XE)|P(?:ei|EI)''')
self._signature_pattern = re.compile(b'''EFI_|D(?:xe|XE)|P(?:ei|EI)|NVAR[\\x00-\\xFF]{7}(?:StdDefaults|PlatformLang|AMITSESetup|SecureBootSetup)\\x00''')
# Ignore padding and microcode files.
self._invalid_file_pattern = re.compile('''(?:Padding|Microcode)_''')
@@ -2587,8 +2587,8 @@ class UEFIExtractor(Extractor):
if not self._uefiextract_path:
return False
# Read up to 16 MB as a safety net.
file_header += util.read_complement(file_path, file_header)
# Read up to 32 MB as a safety net.
file_header += util.read_complement(file_path, file_header, 33554432)
# Stop if no UEFI signatures are found.
if not self._signature_pattern.search(file_header):