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CryptographicException: The supplied handle is invalid. Possible thread safety issue?

Posted By:      Posted Date: April 14, 2011    Points: 0   Category :.NET Framework

I was seeing a "The supplied handle is invalid" message in CryptographicExceptions intermittently, so I created the following program to reproduce the problem based on the hunch that there was a concurrency issue. Originally the problem was occurring when encrypting data, but I've pruned away as much code as I can to make it smaller/easier to understand (of course the KeyWork method doesn't do too much). 

Note: this is CPU intensive and takes a while to complete. Sorry.

The code:


using System;
using System.Security.Cryptography;
using System.Text;

public class P
	public static void Main()
		byte[] public_encrypting_key = StringToByteArray("45434B3542000000016FE13A42A9D54503BC694E9E298760FC03BA99FB224691BF03830BA9FB58354227541F120667843A8813628ADA70126EA06CBCB3537A1986283D3FA3612F124673010CA5F372A32B50E6B648F61DCF70B3E3782324AA6795891ACD8B87F9CA89F128BD

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