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Verify a signature in Node.js

Try our experimental web demo for digital signature verification.

EXPERIMENTAL FEATURE. Digital signature verification is undergoing active development, but currently does not support a number of features. If we are missing a feature that is important to you, or if you have files that do not act as expected, please contact us using one of the following forms: https://www.pdftron.com/form/trial-support/ or https://www.pdftron.com/form/request/

To verify all cryptographic digital signatures in a document:

// Open an existing PDF
const doc = await PDFNet.PDFDoc.createFromURL(doc_url);
doc.initSecurityHandler();

// Choose a security level to use, and change any verification options you wish to change
const opts = await PDFNet.VerificationOptions.create(PDFNet.VerificationOptions.SecurityLevel.e_compatibility_and_archiving);

// Trust a certificate
await opts.addTrustedCertificateFromURL(certificate);

// Iterate over the signatures and verify all of them.
const digsig_fitr = await doc.getDigitalSignatureFieldIteratorBegin();
for (; await digsig_fitr.hasNext(); await digsig_fitr.next()) {
    const curr = await digsig_fitr.current();
    const result = await curr.verify(opts);
    if (await result.getVerificationStatus()) {
        console.log('Signature verified');
    } else {
        console.log('Signature verification failed');
    }
}

Digital signatures
Full code sample which demonstrates using the digital signature API to digitally sign, certify, and/or verify PDF documents.

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