List of usage examples for org.apache.pdfbox.pdmodel.interactive.digitalsignature.visible PDVisibleSignDesigner PDVisibleSignDesigner
public PDVisibleSignDesigner(InputStream imageStream) throws IOException
From source file:com.formkiq.core.service.generator.pdfbox.PdfEditorServiceImpl.java
License:Apache License
/** * Sets value of {@link PDSignatureField}. * @param doc {@link PDDocument}/*from w ww . j ava 2 s . c o m*/ * @param field {@link PDSignatureField} * @param signatureInputStream {@link InputStream} * @return {@link SignatureOptions} * @throws IOException IOException */ private SignatureOptions setValue(final PDDocument doc, final PDSignatureField field, final InputStream signatureInputStream) throws IOException { int accessPermissions = SigUtils.getMDPPermission(doc); if (accessPermissions == 1) { throw new IllegalStateException("No changes to the document are " + "permitted due to DocMDP transform parameters " + "dictionary"); } // retrieve signature dictionary PDSignature signature = field.getSignature(); if (signature == null) { signature = new PDSignature(); // after solving PDFBOX-3524 - signatureField.setValue(signature) // until then: field.getCOSObject().setItem(COSName.V, signature); } else { throw new IllegalStateException( "The signature field " + field.getFullyQualifiedName() + " is already signed."); } // Optional: certify // can be done only if version is at least 1.5 and if not already set // doing this on a PDF/A-1b file fails validation by Adobe // preflight (PDFBOX-3821) // PDF/A-1b requires PDF version 1.4 max, so don't increase the version // on such files. final float version = 1.5f; if (doc.getVersion() >= version && accessPermissions == 0) { SigUtils.setMDPPermission(doc, signature, 2); } PDAcroForm acroForm = doc.getDocumentCatalog().getAcroForm(); if (acroForm != null && acroForm.getNeedAppearances()) { // PDFBOX-3738 NeedAppearances true results in visible signature // becoming invisible // with Adobe Reader if (acroForm.getFields().isEmpty()) { // we can safely delete it if there are no fields acroForm.getCOSObject().removeItem(COSName.NEED_APPEARANCES); // note that if you've set MDP permissions, the removal of this // item // may result in Adobe Reader claiming that the document has // been changed. // and/or that field content won't be displayed properly. // ==> decide what you prefer and adjust your code accordingly. } } // default filter signature.setFilter(PDSignature.FILTER_ADOBE_PPKLITE); // subfilter for basic and PAdES Part 2 signatures signature.setSubFilter(PDSignature.SUBFILTER_ADBE_PKCS7_DETACHED); PDVisibleSignDesigner visibleSignDesigner = new PDVisibleSignDesigner(signatureInputStream); PDVisibleSigProperties visibleSigProps = new PDVisibleSigProperties(); visibleSigProps // .signerName(name) // TODO add.. // .signerLocation(location) // TODO add. // .signatureReason(reason) // .preferredSize(preferredSize) // .page(0) // TODO fix .visualSignEnabled(true).setPdVisibleSignature(visibleSignDesigner); visibleSigProps.buildSignature(); signature.setName(visibleSigProps.getSignerName()); signature.setLocation(visibleSigProps.getSignerLocation()); signature.setReason(visibleSigProps.getSignatureReason()); // the signing date, needed for valid signature signature.setSignDate(Calendar.getInstance()); SignatureOptions sigOptions = new SignatureOptions(); sigOptions.setVisualSignature(visibleSigProps.getVisibleSignature()); sigOptions.setPage(visibleSigProps.getPage() - 1); doc.addSignature(signature, this, sigOptions); return sigOptions; }