private TimestampValidation validateTimestampToken(
final TimeStampToken timeStampToken, final CertificateToken issuerToken) {
TimestampValidity timestampValidity;
try {
final JcaSimpleSignerInfoVerifierBuilder verifierBuilder =
new JcaSimpleSignerInfoVerifierBuilder();
final X509Certificate x509Certificate = issuerToken.getCertificate();
final SignerInformationVerifier verifier = verifierBuilder.build(x509Certificate);
timeStampToken.validate(verifier);
timestampValidity = TimestampValidity.VALID;
} catch (IllegalArgumentException e) {
if (logger.isDebugEnabled()) {
logger.debug("No signing certificate for timestamp token: ", e);
} else {
logger.info("No signing certificate for timestamp token: ", e.getMessage());
}
timestampValidity = TimestampValidity.NO_SIGNING_CERTIFICATE;
} catch (TSPValidationException e) {
if (logger.isDebugEnabled()) {
logger.debug("No valid signature for timestamp token: ", e);
} else {
logger.info("No valid signature for timestamp token: " + e.getMessage());
}
timestampValidity = TimestampValidity.NOT_VALID_SIGNATURE;
} catch (TSPException e) {
if (logger.isDebugEnabled()) {
logger.debug("No valid structure for timestamp token: ", e);
} else {
logger.info("No valid structure for timestamp token: " + e.getMessage());
}
timestampValidity = TimestampValidity.NOT_VALID_STRUCTURE;
} catch (OperatorCreationException e) {
if (logger.isDebugEnabled()) {
logger.debug("No valid structure for timestamp token: ", e);
} else {
logger.info("No valid structure for timestamp token: " + e.getMessage());
}
timestampValidity = TimestampValidity.NOT_VALID_STRUCTURE;
}
final TimestampValidation timestampValidation = new TimestampValidation(timestampValidity);
return timestampValidation;
}
public byte[] timeStamp(byte[] data, RevocationData revocationData) throws Exception {
// digest the message
MessageDigest messageDigest = MessageDigest.getInstance(this.digestAlgo);
byte[] digest = messageDigest.digest(data);
// generate the TSP request
BigInteger nonce = new BigInteger(128, new SecureRandom());
TimeStampRequestGenerator requestGenerator = new TimeStampRequestGenerator();
requestGenerator.setCertReq(true);
if (null != this.requestPolicy) {
requestGenerator.setReqPolicy(this.requestPolicy);
}
TimeStampRequest request = requestGenerator.generate(this.digestAlgoOid, digest, nonce);
byte[] encodedRequest = request.getEncoded();
// create the HTTP client
HttpClient httpClient = new HttpClient();
if (null != this.username) {
Credentials credentials = new UsernamePasswordCredentials(this.username, this.password);
httpClient.getState().setCredentials(AuthScope.ANY, credentials);
}
if (null != this.proxyHost) {
httpClient.getHostConfiguration().setProxy(this.proxyHost, this.proxyPort);
}
// create the HTTP POST request
PostMethod postMethod = new PostMethod(this.tspServiceUrl);
RequestEntity requestEntity =
new ByteArrayRequestEntity(encodedRequest, "application/timestamp-query");
postMethod.addRequestHeader("User-Agent", this.userAgent);
postMethod.setRequestEntity(requestEntity);
// invoke TSP service
int statusCode = httpClient.executeMethod(postMethod);
if (HttpStatus.SC_OK != statusCode) {
LOG.error("Error contacting TSP server " + this.tspServiceUrl);
throw new Exception("Error contacting TSP server " + this.tspServiceUrl);
}
// HTTP input validation
Header responseContentTypeHeader = postMethod.getResponseHeader("Content-Type");
if (null == responseContentTypeHeader) {
throw new RuntimeException("missing Content-Type header");
}
String contentType = responseContentTypeHeader.getValue();
if (!contentType.startsWith("application/timestamp-reply")) {
LOG.debug("response content: " + postMethod.getResponseBodyAsString());
throw new RuntimeException("invalid Content-Type: " + contentType);
}
if (0 == postMethod.getResponseContentLength()) {
throw new RuntimeException("Content-Length is zero");
}
// TSP response parsing and validation
InputStream inputStream = postMethod.getResponseBodyAsStream();
TimeStampResponse timeStampResponse = new TimeStampResponse(inputStream);
timeStampResponse.validate(request);
if (0 != timeStampResponse.getStatus()) {
LOG.debug("status: " + timeStampResponse.getStatus());
LOG.debug("status string: " + timeStampResponse.getStatusString());
PKIFailureInfo failInfo = timeStampResponse.getFailInfo();
if (null != failInfo) {
LOG.debug("fail info int value: " + failInfo.intValue());
if (PKIFailureInfo.unacceptedPolicy == failInfo.intValue()) {
LOG.debug("unaccepted policy");
}
}
throw new RuntimeException(
"timestamp response status != 0: " + timeStampResponse.getStatus());
}
TimeStampToken timeStampToken = timeStampResponse.getTimeStampToken();
SignerId signerId = timeStampToken.getSID();
BigInteger signerCertSerialNumber = signerId.getSerialNumber();
X500Principal signerCertIssuer = signerId.getIssuer();
LOG.debug("signer cert serial number: " + signerCertSerialNumber);
LOG.debug("signer cert issuer: " + signerCertIssuer);
// TSP signer certificates retrieval
CertStore certStore =
timeStampToken.getCertificatesAndCRLs("Collection", BouncyCastleProvider.PROVIDER_NAME);
Collection<? extends Certificate> certificates = certStore.getCertificates(null);
X509Certificate signerCert = null;
Map<String, X509Certificate> certificateMap = new HashMap<String, X509Certificate>();
for (Certificate certificate : certificates) {
X509Certificate x509Certificate = (X509Certificate) certificate;
if (signerCertIssuer.equals(x509Certificate.getIssuerX500Principal())
&& signerCertSerialNumber.equals(x509Certificate.getSerialNumber())) {
signerCert = x509Certificate;
}
String ski = Hex.encodeHexString(getSubjectKeyId(x509Certificate));
certificateMap.put(ski, x509Certificate);
LOG.debug(
"embedded certificate: " + x509Certificate.getSubjectX500Principal() + "; SKI=" + ski);
}
// TSP signer cert path building
if (null == signerCert) {
throw new RuntimeException("TSP response token has no signer certificate");
}
List<X509Certificate> tspCertificateChain = new LinkedList<X509Certificate>();
X509Certificate certificate = signerCert;
do {
LOG.debug("adding to certificate chain: " + certificate.getSubjectX500Principal());
tspCertificateChain.add(certificate);
if (certificate.getSubjectX500Principal().equals(certificate.getIssuerX500Principal())) {
break;
}
String aki = Hex.encodeHexString(getAuthorityKeyId(certificate));
certificate = certificateMap.get(aki);
} while (null != certificate);
// verify TSP signer signature
timeStampToken.validate(tspCertificateChain.get(0), BouncyCastleProvider.PROVIDER_NAME);
// verify TSP signer certificate
this.validator.validate(tspCertificateChain, revocationData);
LOG.debug("time-stamp token time: " + timeStampToken.getTimeStampInfo().getGenTime());
byte[] timestamp = timeStampToken.getEncoded();
return timestamp;
}
