Sign PDF Documents

Sign PDF documents

Use PdfFileSignature when you need to apply a visible digital signature to a PDF.

Steps

1. Create a PdfFileSignature instance and bind the source PDF.
2. Load the certificate either through setCertificate or by creating a PKCS7 object.
3. Call sign with the target page, visibility settings, signature rectangle, and signature data.
4. Save the signed PDF and close the facade object.

Java examples

public static void signPdfWithCertificateObject(Path inputFile, Path certificateFile, Path outputFile) {
    PdfFileSignature pdfSignature = new PdfFileSignature();
    try {
        pdfSignature.bindPdf(inputFile.toString());
        pdfSignature.sign(1, false, signatureRectangle(), createPkcs7(certificateFile, "Document approval"));
        pdfSignature.save(outputFile.toString());
    } finally {
        pdfSignature.close();
    }
}

public static void signPdfWithBasicParameters(Path inputFile, Path certificateFile, Path outputFile) {
    PdfFileSignature pdfSignature = new PdfFileSignature();
    try {
        pdfSignature.bindPdf(inputFile.toString());
        pdfSignature.setCertificate(certificateFile.toString(), CERTIFICATE_PASSWORD);
        pdfSignature.sign(1, "Document approval", "[e-mail]", "New York, USA", false, signatureRectangle());
        pdfSignature.save(outputFile.toString());
    } finally {
        pdfSignature.close();
    }
}