SignatureValidationInfo Class

Contains signature validation information.

Namespace: DevExpress.Office.DigitalSignatures

Assembly: DevExpress.Docs.v23.2.dll

NuGet Package: DevExpress.Document.Processor

Declaration

C#

public class SignatureValidationInfo

VB.NET

Public Class SignatureValidationInfo

Remarks

Use the PackageSignatureValidation.Items property to obtain a list of SignatureValidationInfo objects. The number of items in the list is equal to the number of document signatures.

Use properties from the table below to get more specific information:

Property	Description
SignatureValidationInfo.PassedChecks	Returns verification types the signature passed.
SignatureValidationInfo.PassedCheckDetails	Obtains information about passed verifications.
SignatureValidationInfo.FailedChecks	Returns verification types the signature did not pass.
SignatureValidationInfo.FailedCheckDetails	Retrieves information about failed verifications.
SignatureValidationInfo.CheckDetails	Gets information about all verifications.

The code sample below validates signatures in a DOCX and XLSX document, checks the result, and displays information in the console:

C#

using DevExpress.Office.DigitalSignatures;
using System.Diagnostics;
using System.Net;

static void Main(string[] args)
{
    ValidateSignature("Template_signed.docx");
    ValidateSignature("Template_signed.xlsx");
}

private static void ValidateSignature(string path)
{
    DocumentSigner validator = new DocumentSigner();

    //In this example, certificate validation is skipped
    SignatureValidationOptions validationOptions = new SignatureValidationOptions();
    validationOptions.ValidationFlags = ~ValidationFlags.ValidateSignatureCertificate & ~ValidationFlags.ValidateTimestampCertificate;

    //Validate the signature:
    PackageSignatureValidation signatureValidation = validator.Validate(path, validationOptions);
    AnalyzeValidationResult(signatureValidation);        

}

private static void AnalyzeValidationResult(PackageSignatureValidation signatureValidation)
{
    string validationMessage = signatureValidation.ResultMessage;

    //Check validation result and show information in the console:
    switch (signatureValidation.Result)
    {
        case PackageSignatureValidationResult.Valid:
            Console.WriteLine(validationMessage); Console.ReadKey();
            Process.Start(output);
            break;

        case PackageSignatureValidationResult.SignaturesNotFound:
            Console.WriteLine(validationMessage);
            break;

        case PackageSignatureValidationResult.Invalid:
        case PackageSignatureValidationResult.PartiallyValid:
            var failedCheckDetails = signatureValidation.Items[0].FailedCheckDetails;
            Console.WriteLine(validationMessage);
            int i = 1;
            foreach (SignatureCheckResult checkResult in failedCheckDetails)
            {
                Console.WriteLine(String.Format("Validation details {0}: \r\n" +
                    "{1} failed, Info: {2} \r\n", i, checkResult.CheckType, checkResult.Info));
                i++;
            }
            Console.ReadKey();
            break;
    }
}

VB.NET

Imports Microsoft.VisualBasic
Imports DevExpress.Office.DigitalSignatures
Imports System.Diagnostics
Imports System.Net

Shared Sub Main(ByVal args() As String)
  ValidateSignature("Template_signed.docx")
  ValidateSignature("Template_signed.xlsx")
End Sub

Private Shared Sub ValidateSignature(ByVal path As String)
  Dim validator As New DocumentSigner()

  'In this example, certificate validation is skipped
  Dim validationOptions As New SignatureValidationOptions()
  validationOptions.ValidationFlags = (Not ValidationFlags.ValidateSignatureCertificate) And Not ValidationFlags.ValidateTimestampCertificate

  'Validate the signature:
  Dim signatureValidation As PackageSignatureValidation = validator.Validate(path, validationOptions)
  Dim validationMessage As String = signatureValidation.ResultMessage

  'Check the validation result:
  Select Case signatureValidation.Result
    Case PackageSignatureValidationResult.Valid
      Console.WriteLine(validationMessage)
      Console.ReadKey()
      Process.Start(path)

    Case PackageSignatureValidationResult.SignaturesNotFound
      Console.WriteLine(validationMessage)

    Case PackageSignatureValidationResult.Invalid, PackageSignatureValidationResult.PartiallyValid
      Dim failedCheckDetails = signatureValidation.Items(0).FailedCheckDetails
      Console.WriteLine(validationMessage)
      Dim i As Integer = 1
      For Each checkResult As SignatureCheckResult In failedCheckDetails
        Console.WriteLine(String.Format("Validation details {0}: " & ControlChars.CrLf & "{1} failed, Info: {2} " & ControlChars.CrLf, i, checkResult.CheckType, checkResult.Info))
        i += 1
      Next checkResult
      Console.ReadKey()
  End Select
End Sub

Inheritance

Object

SignatureValidationInfo