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LibGfx/TIFF: Prevent the CCITT decoder to run on non bilevel image

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Lucas CHOLLET 2024-01-09 17:57:30 -05:00 • committed by Andreas Kling
parent 0ef449a588
commit f6b86096a5
1 changed files with 5 additions and 1 deletions
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6
Userland/Libraries/LibGfx/ImageFormats/TIFFLoader.cpp
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@ -270,8 +270,12 @@ private:
break; break;
} }
case Compression::CCITT: { case Compression::CCITT: {
// Section 8: Baseline Field Reference Guide
// BitsPerSample must be 1, since this type of compression is defined only for bilevel images.
if (m_metadata.bits_per_sample()->size() > 1) if (m_metadata.bits_per_sample()->size() > 1)
return Error::from_string_literal("TIFFImageDecoderPlugin: CCITT image with BitsPerSample greater than one, aborting..."); return Error::from_string_literal("TIFFImageDecoderPlugin: CCITT image with BitsPerSample greater than one");
if (m_metadata.photometric_interpretation() != PhotometricInterpretation::WhiteIsZero && m_metadata.photometric_interpretation() != PhotometricInterpretation::BlackIsZero)
return Error::from_string_literal("TIFFImageDecoderPlugin: CCITT compression is used on a non bilevel image");
ByteBuffer decoded_bytes {}; ByteBuffer decoded_bytes {};
auto decode_ccitt_1D_strip = [&](u32 num_bytes) -> ErrorOr<ReadonlyBytes> { auto decode_ccitt_1D_strip = [&](u32 num_bytes) -> ErrorOr<ReadonlyBytes> {