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| | package net.curisit.securis.utils;
| |
| | import java.io.File;
| | import java.io.IOException;
| | import java.io.UnsupportedEncodingException;
| | import java.security.InvalidKeyException;
| | import java.security.KeyFactory;
| | import java.security.KeyPair;
| | import java.security.NoSuchAlgorithmException;
| | import java.security.PrivateKey;
| | import java.security.PublicKey;
| | import java.security.Signature;
| | import java.security.SignatureException;
| | import java.security.spec.InvalidKeySpecException;
| | import java.security.spec.PKCS8EncodedKeySpec;
| | import java.security.spec.X509EncodedKeySpec;
| |
| | import net.curisit.securis.SeCurisException;
| | import net.curisit.securis.beans.LicenseBean;
| |
| | import org.apache.commons.io.FileUtils;
| | import org.apache.commons.net.util.Base64;
| | import org.apache.logging.log4j.LogManager;
| | import org.apache.logging.log4j.Logger;
| |
| | /**
| | * digital Signature utilities
| | *
| | * @author roberto <roberto.sanchez@curisit.net>
| | */
| | public class SignatureHelper {
| |
| | private static final Logger log = LogManager.getLogger(SignatureHelper.class);
| | private static String AUX = "hEDhryRjs2QRE";
| |
| | private static SignatureHelper singleton = new SignatureHelper();
| |
| | private static final String DEFAULT_ALGORITHM = "RSA";
| | public static final String SIGNATURE_GENERATION_ALGORITHM = "SHA256withRSA";
| |
| | private SignatureHelper() {
| | }
| |
| | public static SignatureHelper getInstance() {
| | return singleton;
| | }
| |
| | public void prepareSignature(Signature signature, LicenseBean licBean) throws SeCurisException {
| | try {
| | signature.update(JsonUtils.toJSON(licBean).getBytes("utf-8"));
| | signature.update(AUX.getBytes("utf-8"));
| | } catch (SignatureException | UnsupportedEncodingException e) {
| | throw new SeCurisException("Error generating or validating signature", e);
| | }
| | }
| |
| | public void validateSignature(LicenseBean licBean) throws SeCurisException {
| | Signature signature;
| | try {
| | signature = Signature.getInstance(SIGNATURE_GENERATION_ALGORITHM);
| | signature.initVerify(generatePublicKey());
| |
| | prepareSignature(signature, licBean);
| |
| | if (signature.verify(Base64.decodeBase64(licBean.getSignature())))
| | return;
| | } catch (NoSuchAlgorithmException e) {
| | log.error("Error validating license for " + licBean, e);
| | } catch (InvalidKeyException e) {
| | log.error("Error validating license for " + licBean, e);
| | } catch (InvalidKeySpecException e) {
| | log.error("Error validating license for " + licBean, e);
| | } catch (IOException e) {
| | log.error("Error validating license for " + licBean, e);
| | } catch (SignatureException e) {
| | log.error("Error validating license for " + licBean, e);
| | }
| | throw new SeCurisException("License could not be validated");
| |
| | }
| |
| | private PublicKey generatePublicKey() throws NoSuchAlgorithmException, InvalidKeySpecException, IOException {
| | return generatePublicKey(new File(Params.get(Params.KEYS.PUBLIC_KEY_FILE, System.getenv("SECURIS_PUBLIC_KEY_FILE"))));
| | }
| |
| | private PublicKey generatePublicKey(File publicKeyFile) throws NoSuchAlgorithmException, InvalidKeySpecException, IOException {
| | String pubKeyBase64 = FileUtils.readFileToString(publicKeyFile);
| | int from = pubKeyBase64.indexOf('\n');
| | int to = pubKeyBase64.indexOf("-----END", from);
| | pubKeyBase64 = pubKeyBase64.substring(from, to);
| |
| | KeyFactory keyFactory = KeyFactory.getInstance(DEFAULT_ALGORITHM);
| | X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(Base64.decodeBase64(pubKeyBase64));
| | PublicKey publicKey = keyFactory.generatePublic(publicKeySpec);
| | log.debug("Public key read sucessfully from file: {}", publicKeyFile.getAbsolutePath());
| | return publicKey;
| | }
| |
| | public PrivateKey generatePrivateKey(File privateKeyFile) throws NoSuchAlgorithmException, InvalidKeySpecException, IOException {
| | String privKeyBase64 = FileUtils.readFileToString(privateKeyFile);
| | int from = privKeyBase64.indexOf('\n');
| | int to = privKeyBase64.indexOf("-----END", from);
| | privKeyBase64 = privKeyBase64.substring(from, to);
| |
| | KeyFactory keyFactory = KeyFactory.getInstance(DEFAULT_ALGORITHM);
| | PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privKeyBase64));
| | PrivateKey privateKey = keyFactory.generatePrivate(privateKeySpec);
| |
| | return privateKey;
| | }
| |
| | public KeyPair generateKeyPair(File privateKeyFile, File publicKeyFile) throws NoSuchAlgorithmException, InvalidKeySpecException, IOException {
| |
| | PublicKey publicKey = generatePublicKey(publicKeyFile);
| | PrivateKey privateKey = generatePrivateKey(privateKeyFile);
| |
| | KeyPair kp = new KeyPair(publicKey, privateKey);
| | return kp;
| | }
| |
| | static {
| | byte[] s = new byte[]
| | { 64, -31, -81, 36, 99, -77, 100, 17, 16, -119, 31, 72, 123, -88, -32, 51, 39, -96, -35, 116, -65, 8, 41, -119, -108, -34, 41, 19, 26, -102, -16, -120, -96, 1, -5, -26, -13, 61, -121, 94, 59, 54, 110, 110, -55, 127, -106 };
| | AUX = Base64.encodeBase64String(s);
| | }
| | }
|
|
