Sign with CryptSignMessage

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Hello. I'm signing a document with CryptSignMessage (C), but when I open the document in Adobe, it tells me it's been modified or corrupted. Any recommendations on where the problem might be?

documento_13_signed.pdf

Windows

JR Boulay

Community Expert

[MOVED TO THE ACROBAT FORUM]

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Acrobate du PDF, InDesigner et Photoshopographe

Thom Parker

Community Expert

I opened the file you posted with out any error messages, other than an invalid signature. What the type and version of Acrobat do you have?

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Thom Parker - Software Developer at PDFScriptingUse the Acrobat JavaScript Reference early and often

M

mauriciov51614002Author

Participant

I have version 2025.001.20435. The document does open, but when validating the signature, it indicates that it has been modified or corrupted. However, I've tried recalculating the SHA256 after adding the signature to the document, and it matches the one created before signing. I don't know what else I should check...