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Telerik Document Processing - PdfProcessing Add Digital Signature

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EXAMPLE
VIEW SOURCE

                    digitally_sign_document.cshtml
                
                    DigitallySignDocumentController.cs

API REFERENCE

Configurator

PFX Certificate *

Certificate Password *

Timestamp Server URL

Timestamp Username

Timestamp Password

$(document).ready(function() { $('#exportDocument').click(function () { // Validate inputs let isValid = true; // Check if a certificate file is selected const uploadWidget = $("#certificateUpload").data("kendoUpload"); const files = uploadWidget.getFiles(); if (!files.length) { $("#certificatePath-validation").text("Please select a certificate file").css("color", "red"); isValid = false; } else { $("#certificatePath-validation").text(""); } const certificatePassword = document.getElementById('certificatePassword').value; if (!certificatePassword) { $("#certificatePassword-validation").text("Please enter the certificate password").css("color", "red"); isValid = false; } else { $("#certificatePassword-validation").text(""); } if (!isValid) return; const formData = new FormData(); formData.append("certificateFile", files[0].rawFile); formData.append("certificatePassword", certificatePassword); // Add optional timestamp server fields - these are just passed as form data, not used for authentication const timestampServer = document.getElementById('timestampServer').value.trim(); const timestampUsername = document.getElementById('timestampUsername').value.trim(); const timestampPassword = document.getElementById('timestampPassword').value.trim(); if (timestampServer) { formData.append("timestampServer", timestampServer); if (timestampUsername) { formData.append("timestampUsername", timestampUsername); } if (timestampPassword) { formData.append("timestampPassword", timestampPassword); } } const xhr = new XMLHttpRequest(); xhr.open('POST', '/document-processing/pdfprocessing/sign_and_export', true); xhr.responseType = 'arraybuffer'; xhr.onload = function() { if (this.status === 200) { // Check content type to determine if it's JSON or PDF const contentType = xhr.getResponseHeader("content-type"); if (contentType && contentType.indexOf("application/json") !== -1) { const jsonResponse = JSON.parse(new TextDecoder().decode(this.response)); if (jsonResponse.success === false) { alert(jsonResponse.message); } } else { const blob = new Blob([this.response], { type: 'application/pdf' }); const link = document.createElement('a'); link.href = window.URL.createObjectURL(blob); link.download = "SignedDocument.pdf"; link.click(); } } else { alert("Error: " + this.statusText); } }; xhr.onerror = function() { alert("Request failed"); }; xhr.send(formData); }); }); .page-container { display: flex; flex-wrap: nowrap; width: 100%; } .demo-section { flex: 1; display: flex; justify-content: center; padding-right: 20px; box-sizing: border-box; } .configurator { box-sizing: border-box; margin-left: auto; width: 179px; flex-shrink: 0; margin: -18px -14px -18px -14px; background-color: white; border-left-style: solid; border-left-color: #e2e5eb; border-left-width: 1px; } .form-comments.k-widget.k-form.k-form-md { margin-left: 10px; margin-right: 10px; width: 100%; } .k-form .k-form-legend { border-width: 0 0 1px; } .validation-error { color: #e4444c; font-size: 12px; margin-top: 4px; display: none; } .required-asterisk { color: #e4444c; margin-left: 2px; } .form-notes { padding: 40px 16px 16px 16px; } .k-form-field.field { width: 148px; margin-top: 24px; } .k-form-buttons.field { margin-top: 24px; }

Description

Telerik RadPdfProcessing provides an easy-to-use API that allows you to sign PDF documents that contain a predefined signature field. This example demonstrates how to digitally sign a PDF with the option to provide a TimeStamp Server for enhanced security and validation.

Additional Libraries

This PdfProcessing example is part of Document Processing demos, with which you can see all Telerik Document Processing libraries and their features in action.

Telerik Document Processing - PdfProcessing Add Digital Signature

Description

Additional Libraries

Support & Learning Resources

Additional Resources