Java Code Examples for org.apache.pdfbox.pdmodel.PDDocument#getSignatureDictionaries()

/**
 * <a href="https://stackoverflow.com/questions/57926872/signed-pdf-content-digest-that-was-calculated-during-verification-is-diffrent-th">
 * Signed PDF content digest that was calculated during verification is diffrent than decripted digest from signature
 * </a>
 * <br/>
 * <a href="https://drive.google.com/open?id=1UlOZOp-UYllK7Ra35dggccoWdhcb_Ntp">
 * TEST-signed-pades-baseline-b.pdf
 * </a>
 * <p>
 * The code here demonstrates how to retrieve the messageDigest
 * signed attribute value from a signed PDF. For production use
 * obviously some null checks are required.
 * </p>
 */
@Test
public void testExtractMessageDigestAttributeForUser2893427() throws IOException, CMSException {
    try (   InputStream resource = getClass().getResourceAsStream("TEST-signed-pades-baseline-b.pdf")   ) {
        byte[] bytes = IOUtils.toByteArray(resource);
        PDDocument document = Loader.loadPDF(bytes);
        List<PDSignature> signatures = document.getSignatureDictionaries();
        PDSignature sig = signatures.get(0);
        byte[] cmsBytes = sig.getContents(bytes);
        CMSSignedData cms = new CMSSignedData(cmsBytes);
        SignerInformation signerInformation = cms.getSignerInfos().iterator().next();
        Attribute attribute = signerInformation.getSignedAttributes().get(PKCSObjectIdentifiers.pkcs_9_at_messageDigest);
        ASN1Encodable value = attribute.getAttributeValues()[0];
        System.out.printf("MessageDigest attribute value: %s\n", value);
    }
}
 

private boolean containsFilledSignature(PDDocument pdDocument) {
	try {
		List<PDSignature> signatures = pdDocument.getSignatureDictionaries();
		for (PDSignature pdSignature : signatures) {
			if (pdSignature.getCOSObject().containsKey(COSName.BYTERANGE)) {
				return true;
			}
		}
		return false;
	} catch (IOException e) {
		LOG.warn("Cannot read the existing signature(s)", e);
		return false;
	}
}
 

@Test
public void vri() throws Exception {
	String path = "/validation/Signature-P-HU_MIC-3.pdf";
	String vriValue = "C41B1DBFE0E816D8A6F99A9DB98FD43960A5CF45";

	PDDocument pdDoc = PDDocument.load(getClass().getResourceAsStream(path));
	List<PDSignature> signatureDictionaries = pdDoc.getSignatureDictionaries();
	assertTrue(Utils.isCollectionNotEmpty(signatureDictionaries));
	PDSignature pdSignature = signatureDictionaries.get(0);
	byte[] contents = pdSignature.getContents(getClass().getResourceAsStream(path));
	byte[] digest = DSSUtils.digest(DigestAlgorithm.SHA1, contents);
	assertEquals(vriValue, Utils.upperCase(Utils.toHex(digest)));

	// We can't use CMSSignedData, the pdSignature content is trimmed (000000)
}
 

public void testTimeStampOnly() {
	

		String filePath = "caminho do arquivo";
		
		PDDocument document;
		try {
			document = PDDocument.load(new File(filePath));
			Timestamp varTimeStamp = null;

		for (PDSignature sig : document.getSignatureDictionaries()) {
				COSDictionary sigDict = sig.getCOSObject();
				COSString contents = (COSString) sigDict.getDictionaryObject(COSName.CONTENTS);
				FileInputStream fis = new FileInputStream(filePath);
				byte[] buf = null;

				try {
					buf = sig.getSignedContent(fis);
				} finally {
					fis.close();
				}

				CAdESTimeStampSigner varCAdESTimeStampSigner = new CAdESTimeStampSigner();
				varTimeStamp = varCAdESTimeStampSigner.checkTimeStampPDFWithContent(contents.getBytes(), buf);
			}
		if (varTimeStamp != null){
			System.out.println("Carimbo do tempo");
			System.out.println(varTimeStamp.getTimeStampAuthorityInfo());
			System.out.println(varTimeStamp.getSerialNumber());
			System.out.println(varTimeStamp.getCertificates());
			System.out.println(varTimeStamp.getTimeStamp());				
			
		}
		
		
			
					
		assertTrue(true);
		
	} catch (IOException e) {	
		e.printStackTrace();
		assertTrue(false);
	}
}