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Cryptography, Security, Debugging and more!

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September 2009 - Posts

X509Certificate creates temporary files which are never deleted
Hi all, When creating an X509Certificate object in your .NET application (" X509Certificate cert = new X509Certificate(certBytes); ") you may see that two 0kb files are created in the Temp folder of your Windows Server 2003 , and are never deleted . After Read More...
How to timestamp Authenticode signatures when our proxy requires authentication
Hi all, The other day a customer of mine was trying to add an Authenticode signature with timestamp to their PowerShell scripts with PowerShell itself and its Set-AuthenticodeSignature cmdlet . He was able to sign the scripts just fine, but when using Read More...
MANAGED DEBUGGING with WINDBG. Locks
Hi all, This post is a continuation of MANAGED DEBUGGING with WINDBG. Breaking on an Exception. Part 2 . LOCKS · We can see threads waiting for managed locks : All managed objects have a syncblock (4 bytes) before their Method Table and properties. It Read More...
MANAGED DEBUGGING with WINDBG. Breaking on an Exception. Part 2
Hi all, This post is a continuation of MANAGED DEBUGGING with WINDBG. Breaking on an Exception. Part 1 . BREAKING ON AN EXCEPTION. Part 2 What happens if !PrintException doesn’t return anything, or when we break (i.e. with a breakpoint or manually – Ctrl+Break) Read More...
SubAuthentication package gets Zero LogonId
Hi all, The other day I worked on an issue related to a SubAuthentication package that one of my customers had developed. One of the things that package was doing was getting the LogonId field of the LogonInformation struct being passed to Msv1_0SubAuthenticationFilter Read More...
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