The code example below shows you how to use PDFDocument.AddSignature() method. PDFOne will take care of adding the signature field. You can load an existing document and sign straightaway using PDFDocument.AddSignature() method. Signing a PDF document using a Certificate in the Windows Certificate Store * and serial number of the required certificate.įoreach (string certificateName in certificateNames)ĬN=GlobalSign CA 2 for AATL, O=GlobalSign nv-sa, C=BE, SerialNumber=CFAE6C882722B7704F0D * iterate and print the results to identify the issuer common name Specifies whether to filter the results with only valid/verified certificatesīool includeOnlyValidCertificates = true ĪrrayList certificateNames = doc.FindCertificatesByName(certificateStoreName,ĬertificateIssuerCommonName, findByTimeValid, includeOnlyValidCertificates) * according to current date and time on the computer * Specifies whether to filter the results using Time valid certificates String certificateIssuerCommonName = "GlobalSign" Search criteria to filter the results using issuer name of the certificate PDFDocument doc = new PDFDocument("LICENSE-KEY") The code example below shows you how to use PDFDocument.addSignature() method. This API also includes the certificates in the USB token device when the token is connected to the system. As a result the method returns a list of string objects with each string object containing comma separated value of the certificate details such as issuer common name, serial number, etc. You can use PDFDocument.FindCertificatesByName() method which iterates through the certificates in the specified Windows Certificate store to find the certificates that match the search criteria specified by the optional parameters of the method.
Identifying the issuer common name and serial number of the required certificate In order to sign the document using a certificate installed on the USB token you need to know the issuer common name & serial number of the certificate, and a valid password/PIN to access the USB token. When the USB token is connected to the system, the certificates in the token are added automatically to the Windows Certificate Store under the store name “My”. Digital signature certificates are issued by a Certificate Authority (CA). USB token based certificates are an implementation of PKCS#11, one of the Public-Key Cryptography Standards. To sign PDF documents using a USB token, you need a digital signature certificate that is installed on a USB token. In this article, you will see how to sign PDF documents using a certificate in the Windows Certificate Store which also lists the certificates installed in the USB token when the token is connected to the system.Ī USB token is a password-protected physical device used to store digital certificates. NET Version 7.6, we introduced support for digital signing using a certificate in the Windows Certificate Store.
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