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Signature tool (Android)keyboard_arrow_down

Digital Signature Tool

PDFTron SDK for Xamarin.Android provides a the functionality to add digital signatures with UI.

Use digital signature tool

This tutorial only applies to Xamarin.Android.
For Android, available in the full version of the library only. See PDFTron full or standard?

The Tools package comes with a basic DigitalSignature tool that allows signing with a specific keystore and password. The DigitalSignature tool can be used with the UI components such as DocumentActivity and PdfViewCtrlTabHostFragment. You can also use the tool with PDFViewCtrl through ToolManager.

By default, the signature tool does not sign with a certificate. Certificate-based signatures can be enabled using ToolManagerBuilder which will add a certificate picker and password input field to the signature UI flow.

Alternatively you can define a certificate file and password in ToolManagerBuilder. This will disable the additional signing flow for digital signatures and use the specified certificate instead.

var tmBuilder = ToolManagerBuilder.From()
  .SetUseDigitalSignature(true)
  // Optionally specify a default certificate file and password
  .SetDigitalSignatureKeystorePath("my_keystore_path")
  .SetDigitalSignatureKeystorePassword("my_keystore_password")
var builder = ViewerConfig.Builder()
var config = builder
  //...
  .ToolManagerBuilder(tmBuilder)
  .Build()

The signed signature is then saved to a separate file.

digital signature

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