Corrupted data when the compression method 0x08 -> 0x00 / compressed size info [02 00 00 00]

[3F]

Possible bug with packages was described here:
3F/DllExport#38 (comment)

• Compression method: Deflate (0x08) -> Uncompressed (0x00)
• Actual uncompressed size == 0
• Compressed size == 2

GetNuTool processes packages through System.IO.Packaging.ZipPackage and for this data we can't use this at all:

source.CopyTo(Stream destination);
source.Read(byte[] buffer, int offset, int count);
(new StreamReader(source)).Read(char[] buffer, int index, int count)
(new StreamReader(source)).ReadToEnd();
...

all above will throw exception because of corrupted data and/or incorrect internal processing.

btw:

 // source.Length == 2 
 source.Seek(0, SeekOrigin.Begin);
 source.ReadByte(); // 0x03
 source.ReadByte(); // Exception

 source.Seek(-1, SeekOrigin.End);
 source.ReadByte(); // 0x00
 source.ReadByte(); // -1  end of the stream

 source.Seek(-2, SeekOrigin.End);
 source.ReadByte(); // 0x03
 source.ReadByte(); // Exception

Through ZipPackage implementation we also have no any information about position from file outside processed part. Or does it available ? o_O

Because for this case we can process this manually:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00006850  55 9A DB D3 4F B0  FE 0F 50 4B  03 04 14 00  02 00    UљЫУO°ю.PK......
00006860 [00 00]21 B2 0C 4B [00 00 00 00][02 00 00 00] 00 00    ..!І.K..........
00006870  00 00 0E 00 1C 00  74 6F 6F 6C  73 2F 69 6E  69 74    ......tools/init
00006880  2E 70 73 31 20 A2  18 00 28 A0  14 00 00 00  00 00    .ps1 ў..( ......
00006890  00 00 00 00 00 00  00 00 00 00  00 00 00 00  00 00    ................

other header:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

00003F80  79 F0  E4 37 50 4B  03 04 14 00  02 00 [00 00] 21 B2  yрд7PK........!І
00003F90  0C 4B [00 00 00 00][02 00 00 00] 00 00 00 00 0D 00  .K..............
00003FA0  1C 00  6C 69 62 2F  6E 65 74 32  30 2F 5F 2E 5F 20  ..lib/net20/_._ 
00003FB0  A2 18  00 28 A0 14  00 00 00 00  00 00 00 00 00 00  ў..( ...........

that is, from headers above we have information about uncompressed type data, with compressed size == 2, and actual 0 bytes.

specific exception because of incorrect crc:

• MS.Internal.IO.Zip.ProgressiveCrcCalculatingStream.Read(Byte[] buffer, Int32 offset, Int32 count)

...
if (this._validateCrcWithExpectedCrc && this.CanValidateCrcWithoutRead() && this.CrcCalculator.Crc != this._expectedCrc)
{
	throw new FileFormatException(SR.Get("CorruptedData"));
}

well, seems try/catch is the most easy way to process this case, because it's bug of the System.IO.Packaging.ZipPackage and from nuget.org. Details here: 3F/DllExport#38

Any suggestions are welcome.

[3F]

how it should be now:

gnt /p:ngpackages="DllExport/1.6-beta" /p:debug=true

Getting `DllExport/1.6-beta` ... Extracting into "D:\prg\projects\DllExport\exp_gnt\GetNuTool\versions\01. executable\packages\DllExport.1.6-beta"
- `/3rd-party.txt`
- `/build/net20/DllExport.targets`
- `/build_info.txt`
- `/changelog.txt`
- `/DllExport.bat`
- `/DllExport.nuspec`
- `/lib/net20/_._`
[x]?crc: D:\prg\projects\DllExport\exp_gnt\GetNuTool\versions\01. executable\packages\DllExport.1.6-beta\lib/net20/_._
- `/License.txt`
- `/Readme.md`
- `/tools/build.targets`
- `/tools/coreclr/changelog.txt`
- `/tools/coreclr/coreclr.dll`
- `/tools/coreclr/ilasm.exe`
- `/tools/coreclr/ildasm.exe`
- `/tools/coreclr/ildasmrc.dll`
- `/tools/coreclr/LICENSE.TXT`
- `/tools/coreclr/mscordaccore.dll`
- `/tools/coreclr/mscordbi.dll`
- `/tools/coreclr/PATENTS.TXT`
- `/tools/coreclr/README.md`
- `/tools/coreclr/_Version.txt`
- `/tools/gnt.bat`
- `/tools/hMSBuild.bat`
- `/tools/init.ps1`
[x]?crc: D:\prg\projects\DllExport\exp_gnt\GetNuTool\versions\01. executable\packages\DllExport.1.6-beta\tools/init.ps1
- `/tools/Microsoft.Build.dll`
- `/tools/Microsoft.Build.Framework.dll`
- `/tools/Microsoft.Build.Utilities.v4.0.dll`
- `/tools/Microsoft.Management.Infrastructure.dll`
- `/tools/Mono.Cecil.dll`
- `/tools/MvsSln.dll`
- `/tools/MvsSln.pdb`
- `/tools/MvsSln.xml`
- `/tools/net.r_eg.DllExport.Configurator.dll`
- `/tools/net.r_eg.DllExport.Configurator.pdb`
- `/tools/net.r_eg.DllExport.targets`
- `/tools/net.r_eg.DllExport.Wizard.dll`
- `/tools/net.r_eg.DllExport.Wizard.pdb`
- `/tools/net.r_eg.DllExport.Wizard.targets`
- `/tools/NSBin.dll`
- `/tools/NSBin.pdb`
- `/tools/raw/lib/net20/DllExport.dll`
- `/tools/RGiesecke.DllExport.dll`
- `/tools/RGiesecke.DllExport.MSBuild.dll`
- `/tools/RGiesecke.DllExport.MSBuild.pdb`
- `/tools/RGiesecke.DllExport.pdb`
- `/tools/System.Management.Automation.dll`