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fix deflation of epub files with abnormal zip header #315

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fix deflation of epub files with abnormal zip header #315

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fdcf0a6
fix deflation of epub files with abnormal zip header
Sep 19, 2021
1d09da8
code reformatting
Sep 19, 2021
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12 changes: 6 additions & 6 deletions crengine/src/lvstream/lvzipdecodestream.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -380,12 +380,12 @@ LVStream *LVZipDecodeStream::Create(LVStreamRef stream, lvpos_t pos, lString32 n
if ( stream->Seek( pos, LVSEEK_SET, NULL )!=LVERR_OK )
return NULL;
#endif
if ( packSize==0 && unpSize==0 ) {
// Can happen when local header does not carry these sizes
// Use the ones provided that come from zip central directory
packSize = srcPackSize;
unpSize = srcUnpSize;
}

// When local header does not carry these sizes, use the ones
// that come from zip central directory
if ( packSize==0 ) packSize = srcPackSize;
if ( unpSize==0 ) unpSize = srcUnpSize;

if ((lvpos_t)(pos + packSize) > (lvpos_t)stream->GetSize())
return NULL;
if (hdr.getMethod() == 0) {
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