[Mono-list] Bug in signcode? (Corrupts PE checksum)

[JoelKatz]

We recently tested using the Mono version of 'signcode' in place of
Microsoft's 'signtool'. While the signatures and timestamps checked out, we
noticed that the signed executable was failing PE checksum validation.

For example, file's signed by the Mono signcode fail this check:
http://msdn.microsoft.com/en-us/library/ms680355%28VS.85%29.aspx
The HeaderSum and CheckSum are unequal.

Details of the algorithm used can be found here:
http://www.codeproject.com/KB/cpp/PEChecksum.aspx

DS

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