public void MergeSignatures()
{
if (SignatureFiles.Count < 2)
{
MessageBox.Show("Please add at least two CAdES signature files");
return;
}
if (!string.IsNullOrEmpty(EncapsulatedContentFile) && !File.Exists(EncapsulatedContentFile))
{
MessageBox.Show($"Data file not found: {EncapsulatedContentFile}");
return;
}
try {
// Read encapsulated content file
byte[] encapsulatedContent = null;
if (!string.IsNullOrEmpty(EncapsulatedContentFile))
{
encapsulatedContent = File.ReadAllBytes(EncapsulatedContentFile);
}
// read signature files
var signatures = new List <CadesSignature>();
foreach (var signatureFile in SignatureFiles)
{
signatures.Add(CadesSignature.Open(signatureFile));
}
// merge signatures
var mergedSignature = CadesSignatureEditor.MergeSignatures(signatures, encapsulatedContent);
// save file
var saveFileDialog = new SaveFileDialog()
{
FileName = $"merged-signature.p7s",
};
if (saveFileDialog.ShowDialog() != true)
{
return;
}
File.WriteAllBytes(saveFileDialog.FileName, mergedSignature);
MessageBox.Show($"Merged signature saved on {saveFileDialog.FileName}");
} catch (Exception ex) {
MessageBox.Show(ex.ToString(), "An error has occurred");
}
}
protected void Page_Load(object sender, EventArgs e)
{
var detachedSignatures = Storage.GetSampleCadesDetachedSignaturesToMerge();
var encapsulatedContent = Storage.GetSampleDocContent();
// Open each detached signature.
var signatures = detachedSignatures.Select(ds => Lacuna.Pki.Cades.CadesSignature.Open(ds));
// Merge signatures using the MergeSignatures() method by passing the list of detached signatures to
// be merged and the encapsulated content.
var mergedSignature = CadesSignatureEditor.MergeSignatures(signatures, encapsulatedContent);
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment; filename=merged-signature.p7s");
Response.BinaryWrite(mergedSignature);
Response.End();
}