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Asked: 2026-06-01T05:00:32+00:00

I’ve the following requirement, sign a binary with a certificate, but without signtool.exe; the

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I’ve the following requirement, sign a binary with a certificate, but without signtool.exe; the idea would be to do it via code.

Do you know if it’s possible?

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  1. Editorial Team

    You will need to use the SignerSign or SignerSignEx functions that are exported from mssign32.dll.

    To use these, you’ll need to define managed versions of the SIGNER_SUBJECT_INFO, SIGNER_FILE_INFO, SIGNER_CERT, SIGNER_SIGNATURE_INFO, etc. structs, then correctly specify the P/Invoke signature for the native method.

    Halfway through this blog post, there is a C++ example of calling SignerSignEx; Mark has ported it to C# in this StackOverflow answer.

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