List of usage examples for org.apache.pdfbox.cos COSName NAME
COSName NAME
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From source file:ShowSignature.java
License:Apache License
private void showSignature(String[] args) throws IOException, CertificateException { if (args.length != 2) { usage();//from ww w. j a v a 2 s. co m } else { String password = args[0]; String infile = args[1]; PDDocument document = null; try { document = PDDocument.load(new File(infile), password); if (!document.isEncrypted()) { System.err.println("Warning: Document is not encrypted."); } COSDictionary trailer = document.getDocument().getTrailer(); COSDictionary root = (COSDictionary) trailer.getDictionaryObject(COSName.ROOT); COSDictionary acroForm = (COSDictionary) root.getDictionaryObject(COSName.ACRO_FORM); COSArray fields = (COSArray) acroForm.getDictionaryObject(COSName.FIELDS); for (int i = 0; i < fields.size(); i++) { COSDictionary field = (COSDictionary) fields.getObject(i); COSName type = field.getCOSName(COSName.FT); if (COSName.SIG.equals(type)) { COSDictionary cert = (COSDictionary) field.getDictionaryObject(COSName.V); if (cert != null) { System.out.println("Certificate found"); System.out.println("Name=" + cert.getDictionaryObject(COSName.NAME)); System.out.println("Modified=" + cert.getDictionaryObject(COSName.M)); COSName subFilter = (COSName) cert.getDictionaryObject(COSName.SUB_FILTER); if (subFilter != null) { if (subFilter.getName().equals("adbe.x509.rsa_sha1")) { COSString certString = (COSString) cert .getDictionaryObject(COSName.getPDFName("Cert")); byte[] certData = certString.getBytes(); CertificateFactory factory = CertificateFactory.getInstance("X.509"); ByteArrayInputStream certStream = new ByteArrayInputStream(certData); Collection<? extends Certificate> certs = factory .generateCertificates(certStream); System.out.println("certs=" + certs); } else if (subFilter.getName().equals("adbe.pkcs7.sha1")) { COSString certString = (COSString) cert.getDictionaryObject(COSName.CONTENTS); byte[] certData = certString.getBytes(); CertificateFactory factory = CertificateFactory.getInstance("X.509"); ByteArrayInputStream certStream = new ByteArrayInputStream(certData); Collection<? extends Certificate> certs = factory .generateCertificates(certStream); System.out.println("certs=" + certs); } else { System.err.println("Unknown certificate type:" + subFilter); } } else { throw new IOException("Missing subfilter for cert dictionary"); } } else { System.out.println("Signature found, but no certificate"); } } } } finally { if (document != null) { document.close(); } } } }
From source file:cz.muni.pdfjbim.PdfImageExtractor.java
License:Apache License
/** * This method extracts images by going through all COSObjects pointed from xref table * @param is input stream containing PDF file * @param prefix output basename for images * @param password password for access to PDF if needed * @param pagesToProcess list of pages which should be processed if null given => processed all pages * -- not working yet/*from www .j a v a 2 s.c om*/ * @param binarize -- enables processing of nonbitonal images as well (LZW is still not * processed because of output with inverted colors) * @throws PdfRecompressionException if problem to extract images from PDF */ public void extractImagesUsingPdfParser(InputStream is, String prefix, String password, Set<Integer> pagesToProcess, Boolean binarize) throws PdfRecompressionException { // checking arguments and setting appropriate variables if (binarize == null) { binarize = false; } log.debug("Extracting images (binarize set to {})", binarize); InputStream inputStream = null; if (password != null) { try (ByteArrayOutputStream decryptedOutputStream = new ByteArrayOutputStream()) { PdfReader reader = new PdfReader(is, password.getBytes(StandardCharsets.UTF_8)); PdfStamper stamper = new PdfStamper(reader, decryptedOutputStream); if (stamper != null) { stamper.close(); } inputStream = new ByteArrayInputStream(decryptedOutputStream.toByteArray()); } catch (DocumentException ex) { throw new PdfRecompressionException(ex); } catch (IOException ex) { throw new PdfRecompressionException("Reading file caused exception", ex); } } else { inputStream = is; } PDFParser parser = null; COSDocument doc = null; try { parser = new PDFParser(inputStream); parser.parse(); doc = parser.getDocument(); List<COSObject> objs = doc.getObjectsByType(COSName.XOBJECT); if (objs != null) { for (COSObject obj : objs) { COSBase subtype = obj.getItem(COSName.SUBTYPE); if (subtype.toString().equalsIgnoreCase("COSName{Image}")) { COSBase imageObj = obj.getObject(); COSBase cosNameObj = obj.getItem(COSName.NAME); String key; if (cosNameObj != null) { String cosNameKey = cosNameObj.toString(); int startOfKey = cosNameKey.indexOf("{") + 1; key = cosNameKey.substring(startOfKey, cosNameKey.length() - 1); } else { key = "im0"; } int objectNum = obj.getObjectNumber().intValue(); int genNum = obj.getGenerationNumber().intValue(); PDXObjectImage image = (PDXObjectImage) PDXObjectImage.createXObject(imageObj); PDStream pdStr = new PDStream(image.getCOSStream()); List<COSName> filters = pdStr.getFilters(); log.debug("Detected image with color depth: {} bits", image.getBitsPerComponent()); if (filters == null) { continue; } log.debug("Detected filters: {}", filters.toString()); if ((image.getBitsPerComponent() > 1) && (!binarize)) { log.info("It is not a bitonal image => skipping"); continue; } // at this moment for preventing bad output (bad coloring) from LZWDecode filter if (filters.contains(COSName.LZW_DECODE)) { log.info("This is LZWDecoded => skipping"); continue; } if (filters.contains(COSName.FLATE_DECODE)) { log.debug("FlateDecoded image detected"); } if (filters.contains(COSName.JBIG2_DECODE)) { if (skipJBig2Images) { log.warn("Allready compressed according to JBIG2 standard => skipping"); continue; } else { log.debug("JBIG2 image detected"); } } // detection of unsupported filters by pdfBox library if (filters.contains(COSName.JPX_DECODE)) { log.warn("Unsupported filter JPXDecode => skipping"); continue; } String name = getUniqueFileName(prefix, image.getSuffix()); log.info("Writing image: {}", name); image.write2file(name); PdfImageInformation pdfImageInfo = new PdfImageInformation(key, image.getWidth(), image.getHeight(), objectNum, genNum); originalImageInformations.add(pdfImageInfo); namesOfImages.add(name + "." + image.getSuffix()); } } } } catch (IOException ex) { Tools.deleteFilesFromList(namesOfImages); throw new PdfRecompressionException("Unable to parse PDF document", ex); } catch (Exception ex) { Tools.deleteFilesFromList(namesOfImages); } finally { if (doc != null) { try { doc.close(); } catch (IOException ex) { throw new PdfRecompressionException(ex); } } } }
From source file:cz.muni.pdfjbim.PdfImageProcessor.java
License:Apache License
/** * This method extracts images by going through all COSObjects pointed from xref table * @param is input stream containing PDF file * @param password password for access to PDF if needed * @param pagesToProcess list of pages which should be processed if null given => processed all pages * -- not working yet//from w ww . j a v a 2 s .c o m * @param binarize -- enables processing of nonbitonal images as well (LZW is still not * processed because of output with inverted colors) * @throws PdfRecompressionException if problem to extract images from PDF */ public void extractImagesUsingPdfParser(InputStream is, String prefix, String password, Set<Integer> pagesToProcess, Boolean binarize) throws PdfRecompressionException { // checking arguments and setting appropriate variables if (binarize == null) { binarize = false; } InputStream inputStream = null; if (password != null) { try { ByteArrayOutputStream decryptedOutputStream = null; PdfReader reader = new PdfReader(is, password.getBytes()); PdfStamper stamper = new PdfStamper(reader, decryptedOutputStream); stamper.close(); inputStream = new ByteArrayInputStream(decryptedOutputStream.toByteArray()); } catch (DocumentException ex) { throw new PdfRecompressionException(ex); } catch (IOException ex) { throw new PdfRecompressionException("Reading file caused exception", ex); } } else { inputStream = is; } PDFParser parser = null; COSDocument doc = null; try { parser = new PDFParser(inputStream); parser.parse(); doc = parser.getDocument(); List<COSObject> objs = doc.getObjectsByType(COSName.XOBJECT); if (objs != null) { for (COSObject obj : objs) { COSBase subtype = obj.getItem(COSName.SUBTYPE); if (subtype.toString().equalsIgnoreCase("COSName{Image}")) { COSBase imageObj = obj.getObject(); COSBase cosNameObj = obj.getItem(COSName.NAME); String key; if (cosNameObj != null) { String cosNameKey = cosNameObj.toString(); int startOfKey = cosNameKey.indexOf("{") + 1; key = cosNameKey.substring(startOfKey, cosNameKey.length() - 1); } else { key = "im0"; } int objectNum = obj.getObjectNumber().intValue(); int genNum = obj.getGenerationNumber().intValue(); PDXObjectImage image = (PDXObjectImage) PDXObjectImage.createXObject(imageObj); PDStream pdStr = new PDStream(image.getCOSStream()); List filters = pdStr.getFilters(); if ((image.getBitsPerComponent() > 1) && (!binarize)) { log.info("It is not a bitonal image => skipping"); continue; } // at this moment for preventing bad output (bad coloring) from LZWDecode filter if (filters.contains(COSName.LZW_DECODE.getName())) { log.info("This is LZWDecoded => skipping"); continue; } // detection of unsupported filters by pdfBox library if (filters.contains("JBIG2Decode")) { log.warn("Allready compressed according to JBIG2 standard => skipping"); continue; } if (filters.contains("JPXDecode")) { log.warn("Unsupported filter JPXDecode => skipping"); continue; } String name = getUniqueFileName(prefix, image.getSuffix()); log.info("Writing image:" + name); image.write2file(name); PdfImageInformation pdfImageInfo = new PdfImageInformation(key, image.getWidth(), image.getHeight(), objectNum, genNum); originalImageInformations.add(pdfImageInfo); namesOfImages.add(name + "." + image.getSuffix()); } // } } } } catch (IOException ex) { throw new PdfRecompressionException("Unable to parse PDF document", ex); } finally { if (doc != null) { try { doc.close(); } catch (IOException ex) { throw new PdfRecompressionException(ex); } } } }
From source file:test.be.fedict.eid.applet.PdfSpikeTest.java
License:Open Source License
@Test public void testSignPDF() throws Exception { // create a sample PDF file Document document = new Document(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); PdfWriter.getInstance(document, baos); document.open();//from w ww.ja va 2 s .co m Paragraph titleParagraph = new Paragraph("This is a test."); titleParagraph.setAlignment(Paragraph.ALIGN_CENTER); document.add(titleParagraph); document.newPage(); Paragraph textParagraph = new Paragraph("Hello world."); document.add(textParagraph); document.close(); File tmpFile = File.createTempFile("test-", ".pdf"); LOG.debug("tmp file: " + tmpFile.getAbsolutePath()); FileUtils.writeByteArrayToFile(tmpFile, baos.toByteArray()); // eID PcscEid pcscEid = new PcscEid(new TestView(), new Messages(Locale.getDefault())); if (false == pcscEid.isEidPresent()) { LOG.debug("insert eID card"); pcscEid.waitForEidPresent(); } List<X509Certificate> signCertificateChain = pcscEid.getSignCertificateChain(); Certificate[] certs = new Certificate[signCertificateChain.size()]; for (int idx = 0; idx < certs.length; idx++) { certs[idx] = signCertificateChain.get(idx); } // open the pdf FileInputStream pdfInputStream = new FileInputStream(tmpFile); File signedTmpFile = File.createTempFile("test-signed-", ".pdf"); PdfReader reader = new PdfReader(pdfInputStream); FileOutputStream pdfOutputStream = new FileOutputStream(signedTmpFile); PdfStamper stamper = PdfStamper.createSignature(reader, pdfOutputStream, '\0', null, true); // add extra page Rectangle pageSize = reader.getPageSize(1); int pageCount = reader.getNumberOfPages(); int extraPageIndex = pageCount + 1; stamper.insertPage(extraPageIndex, pageSize); // calculate unique signature field name int signatureNameIndex = 1; String signatureName; AcroFields existingAcroFields = reader.getAcroFields(); List<String> existingSignatureNames = existingAcroFields.getSignatureNames(); do { signatureName = "Signature" + signatureNameIndex; signatureNameIndex++; } while (existingSignatureNames.contains(signatureName)); LOG.debug("new unique signature name: " + signatureName); PdfSignatureAppearance signatureAppearance = stamper.getSignatureAppearance(); signatureAppearance.setCrypto(null, certs, null, PdfSignatureAppearance.SELF_SIGNED); signatureAppearance.setCertificationLevel(PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED); signatureAppearance.setReason("PDF Signature Test"); signatureAppearance.setLocation("Belgium"); signatureAppearance.setVisibleSignature(new Rectangle(54, 440, 234, 566), extraPageIndex, signatureName); signatureAppearance.setExternalDigest(new byte[128], new byte[20], "RSA"); signatureAppearance.preClose(); byte[] content = IOUtils.toByteArray(signatureAppearance.getRangeStream()); byte[] hash = MessageDigest.getInstance("SHA-1").digest(content); byte[] signatureBytes = pcscEid.sign(hash, "SHA-1"); pcscEid.close(); PdfSigGenericPKCS sigStandard = signatureAppearance.getSigStandard(); PdfPKCS7 signature = sigStandard.getSigner(); signature.setExternalDigest(signatureBytes, hash, "RSA"); PdfDictionary dictionary = new PdfDictionary(); dictionary.put(PdfName.CONTENTS, new PdfString(signature.getEncodedPKCS1()).setHexWriting(true)); signatureAppearance.close(dictionary); LOG.debug("signed tmp file: " + signedTmpFile.getAbsolutePath()); // verify the signature reader = new PdfReader(new FileInputStream(signedTmpFile)); AcroFields acroFields = reader.getAcroFields(); ArrayList<String> signatureNames = acroFields.getSignatureNames(); for (String signName : signatureNames) { LOG.debug("signature name: " + signName); LOG.debug("signature covers whole document: " + acroFields.signatureCoversWholeDocument(signName)); LOG.debug("document revision " + acroFields.getRevision(signName) + " of " + acroFields.getTotalRevisions()); PdfPKCS7 pkcs7 = acroFields.verifySignature(signName); Calendar signDate = pkcs7.getSignDate(); LOG.debug("signing date: " + signDate.getTime()); LOG.debug("Subject: " + PdfPKCS7.getSubjectFields(pkcs7.getSigningCertificate())); LOG.debug("Document modified: " + !pkcs7.verify()); Certificate[] verifyCerts = pkcs7.getCertificates(); for (Certificate certificate : verifyCerts) { X509Certificate x509Certificate = (X509Certificate) certificate; LOG.debug("cert subject: " + x509Certificate.getSubjectX500Principal()); } } /* * Reading the signature using Apache PDFBox. */ PDDocument pdDocument = PDDocument.load(signedTmpFile); COSDictionary trailer = pdDocument.getDocument().getTrailer(); /* * PDF Reference - third edition - Adobe Portable Document Format - * Version 1.4 - 3.6.1 Document Catalog */ COSDictionary documentCatalog = (COSDictionary) trailer.getDictionaryObject(COSName.ROOT); /* * 8.6.1 Interactive Form Dictionary */ COSDictionary acroForm = (COSDictionary) documentCatalog.getDictionaryObject(COSName.ACRO_FORM); COSArray fields = (COSArray) acroForm.getDictionaryObject(COSName.FIELDS); for (int fieldIdx = 0; fieldIdx < fields.size(); fieldIdx++) { COSDictionary field = (COSDictionary) fields.getObject(fieldIdx); String fieldType = field.getNameAsString("FT"); if ("Sig".equals(fieldType)) { COSDictionary signatureDictionary = (COSDictionary) field.getDictionaryObject(COSName.V); /* * TABLE 8.60 Entries in a signature dictionary */ COSString signatoryName = (COSString) signatureDictionary.getDictionaryObject(COSName.NAME); if (null != signatoryName) { LOG.debug("signatory name: " + signatoryName.getString()); } COSString reason = (COSString) signatureDictionary.getDictionaryObject(COSName.REASON); if (null != reason) { LOG.debug("reason: " + reason.getString()); } COSString location = (COSString) signatureDictionary.getDictionaryObject(COSName.LOCATION); if (null != location) { LOG.debug("location: " + location.getString()); } Calendar signingTime = signatureDictionary.getDate(COSName.M); if (null != signingTime) { LOG.debug("signing time: " + signingTime.getTime()); } String signatureHandler = signatureDictionary.getNameAsString(COSName.FILTER); LOG.debug("signature handler: " + signatureHandler); } } }