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

JoelKatz davids at webmaster.com
Fri Nov 13 16:34:33 EST 2009

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:
The HeaderSum and CheckSum are unequal.

Details of the algorithm used can be found here:


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