use of org.bouncycastle.cert.jcajce.JcaX509CertificateConverter in project athenz by yahoo.
the class Crypto method generateX509Certificate.
public static X509Certificate generateX509Certificate(PKCS10CertificationRequest certReq, PrivateKey caPrivateKey, X500Name issuer, int validityTimeout, boolean basicConstraints) {
// set validity for the given number of minutes from now
Date notBefore = new Date();
Calendar cal = Calendar.getInstance();
cal.setTime(notBefore);
cal.add(Calendar.MINUTE, validityTimeout);
Date notAfter = cal.getTime();
// Generate self-signed certificate
X509Certificate cert = null;
try {
JcaPKCS10CertificationRequest jcaPKCS10CertificationRequest = new JcaPKCS10CertificationRequest(certReq);
PublicKey publicKey = jcaPKCS10CertificationRequest.getPublicKey();
X509v3CertificateBuilder caBuilder = new JcaX509v3CertificateBuilder(issuer, BigInteger.valueOf(System.currentTimeMillis()), notBefore, notAfter, certReq.getSubject(), publicKey).addExtension(Extension.basicConstraints, false, new BasicConstraints(basicConstraints)).addExtension(Extension.keyUsage, true, new X509KeyUsage(X509KeyUsage.digitalSignature | X509KeyUsage.keyEncipherment)).addExtension(Extension.extendedKeyUsage, true, new ExtendedKeyUsage(new KeyPurposeId[] { KeyPurposeId.id_kp_clientAuth, KeyPurposeId.id_kp_serverAuth }));
// see if we have the dns/rfc822/ip address extensions specified in the csr
ArrayList<GeneralName> altNames = new ArrayList<>();
Attribute[] certAttributes = jcaPKCS10CertificationRequest.getAttributes(PKCSObjectIdentifiers.pkcs_9_at_extensionRequest);
if (certAttributes != null && certAttributes.length > 0) {
for (Attribute attribute : certAttributes) {
Extensions extensions = Extensions.getInstance(attribute.getAttrValues().getObjectAt(0));
GeneralNames gns = GeneralNames.fromExtensions(extensions, Extension.subjectAlternativeName);
if (gns == null) {
continue;
}
GeneralName[] names = gns.getNames();
for (int i = 0; i < names.length; i++) {
switch(names[i].getTagNo()) {
case GeneralName.dNSName:
case GeneralName.iPAddress:
case GeneralName.rfc822Name:
altNames.add(names[i]);
break;
}
}
}
if (!altNames.isEmpty()) {
caBuilder.addExtension(Extension.subjectAlternativeName, false, new GeneralNames(altNames.toArray(new GeneralName[altNames.size()])));
}
}
String signatureAlgorithm = getSignatureAlgorithm(caPrivateKey.getAlgorithm(), SHA256);
ContentSigner caSigner = new JcaContentSignerBuilder(signatureAlgorithm).setProvider(BC_PROVIDER).build(caPrivateKey);
JcaX509CertificateConverter converter = new JcaX509CertificateConverter().setProvider(BC_PROVIDER);
cert = converter.getCertificate(caBuilder.build(caSigner));
} catch (CertificateException ex) {
LOG.error("generateX509Certificate: Caught CertificateException when generating certificate: " + ex.getMessage());
throw new CryptoException(ex);
} catch (OperatorCreationException ex) {
LOG.error("generateX509Certificate: Caught OperatorCreationException when creating JcaContentSignerBuilder: " + ex.getMessage());
throw new CryptoException(ex);
} catch (InvalidKeyException ex) {
LOG.error("generateX509Certificate: Caught InvalidKeySpecException, invalid key spec is being used: " + ex.getMessage());
throw new CryptoException(ex);
} catch (NoSuchAlgorithmException ex) {
LOG.error("generateX509Certificate: Caught NoSuchAlgorithmException, check to make sure the algorithm is supported by the provider: " + ex.getMessage());
throw new CryptoException(ex);
} catch (Exception ex) {
LOG.error("generateX509Certificate: unable to generate X509 Certificate: " + ex.getMessage());
throw new CryptoException("Unable to generate X509 Certificate");
}
return cert;
}
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