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Verify Signature in PDF using C# REST API

This short guide explains how to verify signature in PDF using C# REST API. You will perform digital signature validation online using C# .NET-based API by utilizing a .NET-based Cloud SDK. All the details will be provided to validate a PDF signature.

Prerequisite

Steps to Validate Signature in PDF Online using C# Low Code API

  1. Create a PdfApi instance using your Client ID and Client Secret
  2. Define the local and remote file names for the signed PDF
  3. Read the local signed PDF file from disk
  4. Use UploadFile to send the PDF to cloud storage
  5. Call GetVerifySignature with the file name and signature field name
  6. Retrieve the API response containing the verification status
  7. Print the HTTP status, code, and signature validity to the console

These steps describe the process of PDF signature verification using C# RESTful Service. This code connects to Aspose.PDF Cloud, uploads a signed PDF, and verifies a specific signature field in that document. It then prints out whether the signature is valid, along with the response status and code.

Code to Validate PDF Signature using C# REST Interface

The above code demonstrates how to perform digital signature verification in PDF using C# Low Code API. If your PDF file contains multiple signatures, you can provide the target signature by specifying the signature name.

This article has taught us the process to verify a digital signature in a PDF file. To sign a PDF file, refer to the article on Sign PDF using C# REST API.

 

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