The PDF Document API allows you to apply multiple PKCS#7 signatures with X.509 certificates.
The PdfSignatureBuilder class allows you to apply a signature to a new or existing signature form field. You can sign documents that already contain a signature.
This sample project applies a signature to an existing and new signature field.
- Program.cs (VB: Program.vb)
- Use a Custom Signer Class to Apply Signatures to a PDF Document
- Use the Azure Key Vault API to Sign a PDF document
- Sign a PDF Document with a Certificate Stored on a Hardware Device
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