Avoid Path.GetTempFileName() due to CWE 377 in TarArchive.cs.

[tdhintz]

Steps to reproduce

1. Static code security scan line 827 TarArchive.cs. Example:
   

   SharpZipLib/src/ICSharpCode.SharpZipLib/Tar/TarArchive.cs

   Lines 823 to 831 in b7bc4e0

   	if (asciiTranslate && !entry.IsDirectory)
   	{
   	if (!IsBinary(entryFilename))
   	{
   	tempFileName = Path.GetTempFileName();
   	using (StreamReader inStream = File.OpenText(entryFilename))
   	{
   	using (Stream outStream = File.Create(tempFileName))

Expected behavior

Use sufficiently random names for temporary files to prevent attacks which can predict the name of the file. For example, a Guid or crypto generated random number.

Actual behavior

Security scan failure. #537

Version of SharpZipLib

1.3.1

Obtained from (only keep the relevant lines)

• Package installed using NuGet

[piksel]

Yeah, not sure how I didn't catch that.