protected List<String> getSignatureNames(Blob blob) throws IOException {
PdfReader reader = new PdfReader(blob.getStream());
try {
@SuppressWarnings("unchecked")
List<String> names = reader.getAcroFields().getSignatureNames();
return names;
} finally {
reader.close();
}
}
/** extracts XML from PDF */
protected byte[] getXMLFromPDF(PdfReader reader) throws Exception {
XfaForm xfaForm = reader.getAcroFields().getXfa();
Node domDocument = xfaForm.getDomDocument();
if (domDocument == null) return null;
Element documentElement = ((Document) domDocument).getDocumentElement();
Element datasetsElement =
(Element) documentElement.getElementsByTagNameNS(XFA_NS, "datasets").item(0);
Element dataElement = (Element) datasetsElement.getElementsByTagNameNS(XFA_NS, "data").item(0);
Element xmlElement = (Element) dataElement.getChildNodes().item(0);
Node budgetElement = getBudgetElement(xmlElement);
byte[] serializedXML = XfaForm.serializeDoc(budgetElement);
return serializedXML;
}
// TODO concluir e validar a verifica��o de PDFs
public String verify(final IVFile pdf) {
// Certificados adicionados localmente
KeyStore kall = PdfPKCS7.loadCacertsKeyStore();
StringBuffer sb = new StringBuffer();
final String nl = System.getProperty("line.separator"); // $NON-NLS-1$
InputStream fin = null;
try {
boolean second = false;
PdfReader reader = new PdfReader(fin = pdf.getInputStream());
AcroFields af = reader.getAcroFields();
ArrayList<?> names = af.getSignatureNames();
if (names.isEmpty()) return Messages.getString("PDFSignatureImpl.9"); // $NON-NLS-1$
for (Iterator<?> iter = names.iterator(); iter.hasNext(); ) {
if (second) {
sb.append(nl).append(" ====== ").append(nl).append(nl); // $NON-NLS-1$
}
String name = (String) iter.next();
sb.append(Messages.getString("PDFSignatureImpl.11")).append(name).append(nl); // $NON-NLS-1$
sb.append(Messages.getString("PDFSignatureImpl.12"))
.append(
af.signatureCoversWholeDocument(name)
? Messages.getString("PDFSignatureImpl.13")
: Messages.getString("PDFSignatureImpl.14"))
.append(nl); // $NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
sb.append(Messages.getString("PDFSignatureImpl.15"))
.append(af.getRevision(name))
.append(Messages.getString("PDFSignatureImpl.16"))
.append(af.getTotalRevisions())
.append(nl); // $NON-NLS-1$ //$NON-NLS-2$
PdfPKCS7 pk = af.verifySignature(name);
Calendar cal = pk.getSignDate();
Certificate pkc[] = pk.getCertificates();
sb.append(Messages.getString("PDFSignatureImpl.17"))
.append(PdfPKCS7.getSubjectFields(pk.getSigningCertificate()))
.append(nl); // $NON-NLS-1$
sb.append(Messages.getString("PDFSignatureImpl.18"))
.append(
!pk.verify()
? Messages.getString("PDFSignatureImpl.19")
: Messages.getString("PDFSignatureImpl.20"))
.append(nl); // $NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
Object fails[] = PdfPKCS7.verifyCertificates(pkc, kall, null, cal);
if (fails == null)
sb.append(Messages.getString("PDFSignatureImpl.21")).append(nl); // $NON-NLS-1$
else
sb.append(Messages.getString("PDFSignatureImpl.22"))
.append(nl); // : " + fails[1]); //$NON-NLS-1$
}
} catch (Exception e) {
log.error("error verifying file", e); // $NON-NLS-1$
return Messages.getString("PDFSignatureImpl.24"); // $NON-NLS-1$
} finally {
try {
if (fin != null) {
fin.close();
}
} catch (IOException e) {
}
}
return sb.toString();
}
