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fix async zip decompression

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This commit is contained in:
Adam Hathcock
2026-01-07 14:54:32 +00:00
parent c3fd42057a
commit b9792ca491
1 changed files with 25 additions and 1 deletions
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26
src/SharpCompress/Common/Zip/ZipFilePart.cs
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@@ -470,11 +470,35 @@ internal abstract class ZipFilePart : FilePart
{
throw new InvalidFormatException("No Winzip AES extra data found.");
}
if (data.Length != 7)
{
throw new InvalidFormatException("Winzip data length is not 7.");
}
throw new NotSupportedException("WinzipAes isn't supported for streaming");
var compressedMethod = BinaryPrimitives.ReadUInt16LittleEndian(data.DataBytes);
if (compressedMethod != 0x01 && compressedMethod != 0x02)
{
throw new InvalidFormatException(
"Unexpected vendor version number for WinZip AES metadata"
);
}
var vendorId = BinaryPrimitives.ReadUInt16LittleEndian(data.DataBytes.AsSpan(2));
if (vendorId != 0x4541)
{
throw new InvalidFormatException(
"Unexpected vendor ID for WinZip AES metadata"
);
}
return await CreateDecompressionStreamAsync(
stream,
(ZipCompressionMethod)
BinaryPrimitives.ReadUInt16LittleEndian(data.DataBytes.AsSpan(5)),
cancellationToken
);
}
default:
{