Latest release (July 2024)
The release of GroupDocs.Signature version 24.7 adds new enhancement.
Full list of changes in this release
Key | Category | Summary |
---|---|---|
SIGNATURENET-4809 | Enhancement | PDF digital signing with external digital signatures |
SIGNATUREJAVA-2877 | 🔧 Fix | Image layers issue for .dcm format |
Major Features
This release include one enhancement:
PDF digital signing with external digital signatures
Utilizing certificates with a Private Key for signing PDF documents ensures secure and legally recognized digital transactions, offering robust protection against tampering and fraud in electronic document workflows. GroupDocs.Signature for Java offers the functionality to add external digital signatures from a key store. You can apply a signature by accepting a certificate provided by a certificate store that contains the Private Key.
🌐 In this release, we’ve added a new constructor to the DigitalSignature class and introduced two new public properties: X509Certificate and PrivateKey to necessary for signing a Pdf document using an external signature .
/// <summary>
/// Sign pdf document with external signature
/// </summary>
Signature signature = new Signature("sample.pdf"))
{
//Only certificates with private key are good for digital signing
KeyStore trustStore = KeyStore.getInstance("Windows-My");
trustStore.load(null, null);
// Get certificate and key from local key storage using the certificate alias.
String alias = "ProfMoriarty";
java.security.cert.X509Certificate certificate = (java.security.cert.X509Certificate) trustStore.getCertificate(alias);
PrivateKey key = (PrivateKey) trustStore.getKey(alias, null);
// Create digital signature
DigitalSignature digitalSignature = new DigitalSignature(certificate, key)
DigitalSignOptions options = new DigitalSignOptions();
options.setSignature(digitalSignature);
// digital certificate details
options.setReason("Approved");
options.setContact("John Smith");
options.setLocation("New York");
SignResult signResult = signature.sign("outputFilePath.pdf", options);
}