Package javax.crypto

Examples of javax.crypto.KeyAgreement

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        checkLength(key, MINIMUM_SECRET_KEY_SIZE);
    }

    private byte[] generateSecret(java.security.PrivateKey privateKey, PublicKey publicKey) {
        MessageDigest hash = null;
        KeyAgreement keyAgree = null;
        try {
            hash = MessageDigest.getInstance("SHA-256", AeroGearCrypto.PROVIDER);
            keyAgree = KeyAgreement.getInstance("ECDH", AeroGearCrypto.PROVIDER);
            keyAgree.init(privateKey);
            keyAgree.doPhase(publicKey, true);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        } catch (InvalidKeyException e) {
            throw new RuntimeException("Fail: ", e);
        }

        return hash.digest(keyAgree.generateSecret());
    }
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                            // client cert. contains fixed DH parameters
                            preMasterSecret = ((DHPublicKey) clientCert.certs[0]
                                    .getPublicKey()).getY().toByteArray();
                        } else {
                            PublicKey clientPublic;
                            KeyAgreement agreement;
                            try {
                                KeyFactory kf = null;
                                try {
                                    kf = KeyFactory.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    kf = KeyFactory
                                            .getInstance("DiffieHellman");
                                }
                                try {
                                    agreement = KeyAgreement.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    agreement = KeyAgreement
                                            .getInstance("DiffieHellman");
                                }
                                clientPublic = kf
                                        .generatePublic(new DHPublicKeySpec(
                                                new BigInteger(
                                                        1,
                                                        clientKeyExchange.exchange_keys),
                                                serverKeyExchange.par1,
                                                serverKeyExchange.par2));
                                agreement.init(privKey);
                                agreement.doPhase(clientPublic, true);
                                preMasterSecret = agreement.generateSecret();
                            } catch (Exception e) {
                                fatalAlert(AlertProtocol.INTERNAL_ERROR,
                                        "INTERNAL ERROR", e);
                                return;
                            }
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                        "Unexpected exception", e);
                return;
            }
        } else {
            PublicKey serverPublic;
            KeyAgreement agreement = null;
            DHParameterSpec spec;
            try {
                KeyFactory kf = null;
                try {
                    kf = KeyFactory.getInstance("DH");
                } catch (NoSuchAlgorithmException e) {
                    kf = KeyFactory.getInstance("DiffieHellman");
                }
               
                try {
                    agreement = KeyAgreement.getInstance("DH");
                } catch (NoSuchAlgorithmException ee) {
                    agreement = KeyAgreement.getInstance("DiffieHellman");
                }

                KeyPairGenerator kpg = null;
                try {
                    kpg = KeyPairGenerator.getInstance("DH");
                } catch (NoSuchAlgorithmException e) {
                    kpg = KeyPairGenerator.getInstance("DiffieHellman");
                }
                if (serverKeyExchange != null) {
                    serverPublic = kf.generatePublic(new DHPublicKeySpec(
                            serverKeyExchange.par3, serverKeyExchange.par1,
                            serverKeyExchange.par2));
                    spec = new DHParameterSpec(serverKeyExchange.par1,
                            serverKeyExchange.par2);
                } else {
                    serverPublic = serverCert.certs[0].getPublicKey();
                    spec = ((DHPublicKey) serverPublic).getParams();
                }
                kpg.initialize(spec);

                KeyPair kp = kpg.generateKeyPair();
                Key key = kp.getPublic();
                if (clientCert != null
                        && serverCert != null
                        && (session.cipherSuite.keyExchange == CipherSuite.KeyExchange_DHE_RSA
                                || session.cipherSuite.keyExchange == CipherSuite.KeyExchange_DHE_DSS)) {
                    PublicKey client_pk = clientCert.certs[0].getPublicKey();
                    PublicKey server_pk = serverCert.certs[0].getPublicKey();
                    if (client_pk instanceof DHKey
                            && server_pk instanceof DHKey) {
                        if (((DHKey) client_pk).getParams().getG().equals(
                                ((DHKey) server_pk).getParams().getG())
                                && ((DHKey) client_pk).getParams().getP()
                                    .equals(((DHKey) server_pk).getParams().getG())) {
                            // client cert message DH public key parameters
                            // matched those specified by the
                            //   server in its certificate,
                            clientKeyExchange = new ClientKeyExchange(); // empty
                        }
                    }
                } else {
                    clientKeyExchange = new ClientKeyExchange(
                            ((DHPublicKey) key).getY());
                }
                key = kp.getPrivate();
                agreement.init(key);
                agreement.doPhase(serverPublic, true);
                preMasterSecret = agreement.generateSecret();
            } catch (Exception e) {
                fatalAlert(AlertProtocol.INTERNAL_ERROR,
                        "Unexpected exception", e);
                return;
            }
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                            // client cert. contains fixed DH parameters
                            preMasterSecret = ((DHPublicKey) clientCert.certs[0]
                                    .getPublicKey()).getY().toByteArray();
                        } else {
                            PublicKey clientPublic;
                            KeyAgreement agreement;
                            try {
                                KeyFactory kf = null;
                                try {
                                    kf = KeyFactory.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    kf = KeyFactory
                                            .getInstance("DiffieHellman");
                                }
                                try {
                                    agreement = KeyAgreement.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    agreement = KeyAgreement
                                            .getInstance("DiffieHellman");
                                }
                                clientPublic = kf
                                        .generatePublic(new DHPublicKeySpec(
                                                new BigInteger(
                                                        1,
                                                        clientKeyExchange.exchange_keys),
                                                serverKeyExchange.par1,
                                                serverKeyExchange.par2));
                                agreement.init(privKey);
                                agreement.doPhase(clientPublic, true);
                                preMasterSecret = agreement.generateSecret();
                            } catch (Exception e) {
                                fatalAlert(AlertProtocol.INTERNAL_ERROR,
                                        "INTERNAL ERROR", e);
                                return;
                            }
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                        "Unexpected exception", e);
                return;
            }
        } else {
            PublicKey serverPublic;
            KeyAgreement agreement = null;
            DHParameterSpec spec;
            try {
                KeyFactory kf = null;
                try {
                    kf = KeyFactory.getInstance("DH");
                } catch (NoSuchAlgorithmException e) {
                    kf = KeyFactory.getInstance("DiffieHellman");
                }
               
                try {
                    agreement = KeyAgreement.getInstance("DH");
                } catch (NoSuchAlgorithmException ee) {
                    agreement = KeyAgreement.getInstance("DiffieHellman");
                }

                KeyPairGenerator kpg = null;
                try {
                    kpg = KeyPairGenerator.getInstance("DH");
                } catch (NoSuchAlgorithmException e) {
                    kpg = KeyPairGenerator.getInstance("DiffieHellman");
                }
                if (serverKeyExchange != null) {
                    serverPublic = kf.generatePublic(new DHPublicKeySpec(
                            serverKeyExchange.par3, serverKeyExchange.par1,
                            serverKeyExchange.par2));
                    spec = new DHParameterSpec(serverKeyExchange.par1,
                            serverKeyExchange.par2);
                } else {
                    serverPublic = serverCert.certs[0].getPublicKey();
                    spec = ((DHPublicKey) serverPublic).getParams();
                }
                kpg.initialize(spec);

                KeyPair kp = kpg.generateKeyPair();
                Key key = kp.getPublic();
                if (clientCert != null
                        && serverCert != null
                        && (session.cipherSuite.keyExchange == CipherSuite.KeyExchange_DHE_RSA
                                || session.cipherSuite.keyExchange == CipherSuite.KeyExchange_DHE_DSS)) {
                    PublicKey client_pk = clientCert.certs[0].getPublicKey();
                    PublicKey server_pk = serverCert.certs[0].getPublicKey();
                    if (client_pk instanceof DHKey
                            && server_pk instanceof DHKey) {
                        if (((DHKey) client_pk).getParams().getG().equals(
                                ((DHKey) server_pk).getParams().getG())
                                && ((DHKey) client_pk).getParams().getP()
                                    .equals(((DHKey) server_pk).getParams().getG())) {
                            // client cert message DH public key parameters
                            // matched those specified by the
                            //   server in its certificate,
                            clientKeyExchange = new ClientKeyExchange(); // empty
                        }
                    }
                } else {
                    clientKeyExchange = new ClientKeyExchange(
                            ((DHPublicKey) key).getY());
                }
                key = kp.getPrivate();
                agreement.init(key);
                agreement.doPhase(serverPublic, true);
                preMasterSecret = agreement.generateSecret();
            } catch (Exception e) {
                fatalAlert(AlertProtocol.INTERNAL_ERROR,
                        "Unexpected exception", e);
                return;
            }
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                            // client cert. contains fixed DH parameters
                            preMasterSecret = ((DHPublicKey) clientCert.certs[0]
                                    .getPublicKey()).getY().toByteArray();
                        } else {
                            PublicKey clientPublic;
                            KeyAgreement agreement;
                            try {
                                KeyFactory kf = null;
                                try {
                                    kf = KeyFactory.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    kf = KeyFactory
                                            .getInstance("DiffieHellman");
                                }
                                try {
                                    agreement = KeyAgreement.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    agreement = KeyAgreement
                                            .getInstance("DiffieHellman");
                                }
                                clientPublic = kf
                                        .generatePublic(new DHPublicKeySpec(
                                                new BigInteger(
                                                        1,
                                                        clientKeyExchange.exchange_keys),
                                                serverKeyExchange.par1,
                                                serverKeyExchange.par2));
                                agreement.init(privKey);
                                agreement.doPhase(clientPublic, true);
                                preMasterSecret = agreement.generateSecret();
                            } catch (Exception e) {
                                fatalAlert(AlertProtocol.INTERNAL_ERROR,
                                        "INTERNAL ERROR", e);
                                return;
                            }
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        }
    }

    private byte[] generateEcdhSecret(PrivateKey privateKey, PublicKey publicKey) throws InvalidKeyException
    {
        KeyAgreement keyAgreement = getKeyAgreement();

        try
        {
            keyAgreement.init(privateKey);
            keyAgreement.doPhase(publicKey, true);
        }
        catch (java.security.InvalidKeyException e)
        {
            throw new InvalidKeyException("Invalid Key for " + getJavaAlgorithm() + " key agreement." ,e);
        }

        return keyAgreement.generateSecret();
    }
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      throw new TorException(e);
    }
  }
  private final KeyAgreement createDH() {
    try {
      KeyAgreement dh = KeyAgreement.getInstance("DH");
      dh.init(keyPair.getPrivate());
      return dh;
    } catch (GeneralSecurityException e) {
      throw new TorException(e);
    }
  }
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        try {
            KeyFactory kf = getKeyFactory();
            PublicKey key = kf.generatePublic(spec);

            KeyAgreement agree = getKeyAgreement();
            agree.init(privKey);
            agree.doPhase(key, true);
            byte[] secret = agree.generateSecret();
            return Buffer.BufferImpl.newBuffer(cx, this, secret);

        } catch (NoSuchAlgorithmException e) {
            throw new AssertionError(e);
        } catch (InvalidKeyException e) {
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                            // client cert. contains fixed DH parameters
                            preMasterSecret = ((DHPublicKey) clientCert.certs[0]
                                    .getPublicKey()).getY().toByteArray();
                        } else {
                            PublicKey clientPublic;
                            KeyAgreement agreement;
                            try {
                                KeyFactory kf = null;
                                try {
                                    kf = KeyFactory.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    kf = KeyFactory
                                            .getInstance("DiffieHellman");
                                }
                                try {
                                    agreement = KeyAgreement.getInstance("DH");
                                } catch (NoSuchAlgorithmException ee) {
                                    agreement = KeyAgreement
                                            .getInstance("DiffieHellman");
                                }
                                clientPublic = kf
                                        .generatePublic(new DHPublicKeySpec(
                                                new BigInteger(
                                                        1,
                                                        clientKeyExchange.exchange_keys),
                                                serverKeyExchange.par1,
                                                serverKeyExchange.par2));
                                agreement.init(privKey);
                                agreement.doPhase(clientPublic, true);
                                preMasterSecret = agreement.generateSecret();
                            } catch (Exception e) {
                                fatalAlert(AlertProtocol.INTERNAL_ERROR,
                                        "INTERNAL ERROR", e);
                                return;
                            }
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Related Classes of javax.crypto.KeyAgreement

  • ch.ethz.inf.vs.scandium.dtls.ECDHECryptography
  • com.CryptoAlgorithms.DiffieHellman.DHAlgorithm
  • com.subgraph.orchid.crypto.TorTapKeyAgreement
  • freenet.crypt.ECDH
  • gnu.testlet.gnu.javax.crypto.jce.TestOfDHKeyAgreement2
  • hudson.cli.Connection
  • io.apigee.trireme.core.modules.crypto.AbstractDH
  • io.nodyn.crypto.dh.DiffieHellman
  • org.apache.abdera.security.util.DHContext
  • org.apache.abdera.security.util.servlet.DHContext
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