Examples with KeyFactory java.security.KeyFactory used on opensource projects

Example 41 with KeyFactory

use of java.security.KeyFactory in project xabber-android by redsolution.

the class AccountTable method getKeyPair.

static KeyPair getKeyPair(Cursor cursor) {
    byte[] publicKeyBytes = cursor.getBlob(cursor.getColumnIndex(Fields.PUBLIC_KEY));
    byte[] privateKeyBytes = cursor.getBlob(cursor.getColumnIndex(Fields.PRIVATE_KEY));
    if (privateKeyBytes == null || publicKeyBytes == null) {
        return null;
    }
    X509EncodedKeySpec publicKeySpec = new X509EncodedKeySpec(publicKeyBytes);
    PKCS8EncodedKeySpec privateKeySpec = new PKCS8EncodedKeySpec(privateKeyBytes);
    PublicKey publicKey;
    PrivateKey privateKey;
    KeyFactory keyFactory;
    try {
        keyFactory = KeyFactory.getInstance("DSA");
        publicKey = keyFactory.generatePublic(publicKeySpec);
        privateKey = keyFactory.generatePrivate(privateKeySpec);
    } catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
        throw new RuntimeException(e);
    }
    return new KeyPair(publicKey, privateKey);
}

Example 42 with KeyFactory

use of java.security.KeyFactory in project robovm by robovm.

the class ClientHandshakeImpl method processServerHelloDone.

/**
     * Processes ServerHelloDone: makes verification of the server messages; sends
     * client messages, computers masterSecret, sends ChangeCipherSpec
     */
void processServerHelloDone() {
    PrivateKey clientKey = null;
    if (serverCert != null) {
        if (session.cipherSuite.isAnonymous()) {
            unexpectedMessage();
            return;
        }
        verifyServerCert();
    } else {
        if (!session.cipherSuite.isAnonymous()) {
            unexpectedMessage();
            return;
        }
    }
    // Client certificate
    if (certificateRequest != null) {
        X509Certificate[] certs = null;
        // obtain certificates from key manager
        String alias = null;
        String[] certTypes = certificateRequest.getTypesAsString();
        X500Principal[] issuers = certificateRequest.certificate_authorities;
        X509KeyManager km = parameters.getKeyManager();
        if (km instanceof X509ExtendedKeyManager) {
            X509ExtendedKeyManager ekm = (X509ExtendedKeyManager) km;
            if (this.socketOwner != null) {
                alias = ekm.chooseClientAlias(certTypes, issuers, this.socketOwner);
            } else {
                alias = ekm.chooseEngineClientAlias(certTypes, issuers, this.engineOwner);
            }
            if (alias != null) {
                certs = ekm.getCertificateChain(alias);
            }
        } else {
            alias = km.chooseClientAlias(certTypes, issuers, this.socketOwner);
            if (alias != null) {
                certs = km.getCertificateChain(alias);
            }
        }
        session.localCertificates = certs;
        clientCert = new CertificateMessage(certs);
        clientKey = km.getPrivateKey(alias);
        send(clientCert);
    }
    // Client key exchange
    if (session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_RSA || session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_RSA_EXPORT) {
        // RSA encrypted premaster secret message
        Cipher c;
        try {
            c = Cipher.getInstance("RSA/ECB/PKCS1Padding");
            if (serverKeyExchange != null) {
                if (!session.cipherSuite.isAnonymous()) {
                    DigitalSignature ds = new DigitalSignature(serverCert.getAuthType());
                    ds.init(serverCert.certs[0]);
                    ds.update(clientHello.getRandom());
                    ds.update(serverHello.getRandom());
                    if (!serverKeyExchange.verifySignature(ds)) {
                        fatalAlert(AlertProtocol.DECRYPT_ERROR, "Cannot verify RSA params");
                        return;
                    }
                }
                c.init(Cipher.WRAP_MODE, serverKeyExchange.getRSAPublicKey());
            } else {
                c.init(Cipher.WRAP_MODE, serverCert.certs[0]);
            }
        } catch (Exception e) {
            fatalAlert(AlertProtocol.INTERNAL_ERROR, "Unexpected exception", e);
            return;
        }
        preMasterSecret = new byte[48];
        parameters.getSecureRandom().nextBytes(preMasterSecret);
        System.arraycopy(clientHello.client_version, 0, preMasterSecret, 0, 2);
        try {
            clientKeyExchange = new ClientKeyExchange(c.wrap(new SecretKeySpec(preMasterSecret, "preMasterSecret")), serverHello.server_version[1] == 1);
        } catch (Exception e) {
            fatalAlert(AlertProtocol.INTERNAL_ERROR, "Unexpected exception", e);
            return;
        }
    } else if (session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_DHE_DSS || session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_DHE_DSS_EXPORT || session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_DHE_RSA || session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_DHE_RSA_EXPORT || session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_DH_anon || session.cipherSuite.keyExchange == CipherSuite.KEY_EXCHANGE_DH_anon_EXPORT) {
        /*
             * All other key exchanges should have had a DH key communicated via
             * ServerKeyExchange beforehand.
             */
        if (serverKeyExchange == null) {
            fatalAlert(AlertProtocol.UNEXPECTED_MESSAGE, "Expected ServerKeyExchange");
            return;
        }
        if (session.cipherSuite.isAnonymous() != serverKeyExchange.isAnonymous()) {
            fatalAlert(AlertProtocol.DECRYPT_ERROR, "Wrong type in ServerKeyExchange");
            return;
        }
        try {
            if (!session.cipherSuite.isAnonymous()) {
                DigitalSignature ds = new DigitalSignature(serverCert.getAuthType());
                ds.init(serverCert.certs[0]);
                ds.update(clientHello.getRandom());
                ds.update(serverHello.getRandom());
                if (!serverKeyExchange.verifySignature(ds)) {
                    fatalAlert(AlertProtocol.DECRYPT_ERROR, "Cannot verify DH params");
                    return;
                }
            }
            KeyFactory kf = KeyFactory.getInstance("DH");
            KeyAgreement agreement = KeyAgreement.getInstance("DH");
            KeyPairGenerator kpg = KeyPairGenerator.getInstance("DH");
            PublicKey serverDhPublic = kf.generatePublic(new DHPublicKeySpec(serverKeyExchange.par3, serverKeyExchange.par1, serverKeyExchange.par2));
            DHParameterSpec spec = new DHParameterSpec(serverKeyExchange.par1, serverKeyExchange.par2);
            kpg.initialize(spec);
            KeyPair kp = kpg.generateKeyPair();
            DHPublicKey pubDhKey = (DHPublicKey) kp.getPublic();
            clientKeyExchange = new ClientKeyExchange(pubDhKey.getY());
            PrivateKey privDhKey = kp.getPrivate();
            agreement.init(privDhKey);
            agreement.doPhase(serverDhPublic, true);
            preMasterSecret = agreement.generateSecret();
        } catch (Exception e) {
            fatalAlert(AlertProtocol.INTERNAL_ERROR, "Unexpected exception", e);
            return;
        }
    } else {
        fatalAlert(AlertProtocol.DECRYPT_ERROR, "Unsupported handshake type");
        return;
    }
    if (clientKeyExchange != null) {
        send(clientKeyExchange);
    }
    computerMasterSecret();
    // fixed DH parameters
    if (clientCert != null && clientCert.certs.length > 0 && !clientKeyExchange.isEmpty()) {
        // Certificate verify
        String authType = clientKey.getAlgorithm();
        DigitalSignature ds = new DigitalSignature(authType);
        ds.init(clientKey);
        if ("RSA".equals(authType)) {
            ds.setMD5(io_stream.getDigestMD5());
            ds.setSHA(io_stream.getDigestSHA());
        } else if ("DSA".equals(authType)) {
            ds.setSHA(io_stream.getDigestSHA());
        // The Signature should be empty in case of anonymous signature algorithm:
        // } else if ("DH".equals(authType)) {
        }
        certificateVerify = new CertificateVerify(ds.sign());
        send(certificateVerify);
    }
    sendChangeCipherSpec();
}

Example 43 with KeyFactory

use of java.security.KeyFactory in project hudson-2.x by hudson.

the class UsageStatistics method getCipher.

private Cipher getCipher() {
    try {
        if (key == null) {
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            key = keyFactory.generatePublic(new X509EncodedKeySpec(Util.fromHexString(keyImage)));
        }
        Cipher cipher = Secret.getCipher("RSA");
        cipher.init(Cipher.ENCRYPT_MODE, key);
        return cipher;
    } catch (GeneralSecurityException e) {
        // impossible
        throw new Error(e);
    }
}

Example 44 with KeyFactory

use of java.security.KeyFactory in project OpenAttestation by OpenAttestation.

the class X509Util method decodeDerPublicKey.

public static PublicKey decodeDerPublicKey(byte[] publicKeyBytes) throws CryptographyException {
    try {
        // throws NoSuchAlgorithmException
        KeyFactory factory = KeyFactory.getInstance("RSA");
        // throws InvalidKeySpecException
        PublicKey publicKey = factory.generatePublic(new X509EncodedKeySpec(publicKeyBytes));
        return publicKey;
    } catch (Exception e) {
        throw new CryptographyException(e);
    }
}

Example 45 with KeyFactory

use of java.security.KeyFactory in project PushSms by koush.

the class MiddlewareService method getOrCreateKeyPair.

// create/read the keypair as necessary
private void getOrCreateKeyPair() {
    String encodedKeyPair = settings.getString("keypair", null);
    if (encodedKeyPair != null) {
        try {
            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
            ByteArrayInputStream bin = new ByteArrayInputStream(Base64.decode(encodedKeyPair, Base64.DEFAULT));
            ObjectInputStream in = new ObjectInputStream(bin);
            rsaPublicKeySpec = new RSAPublicKeySpec((BigInteger) in.readObject(), (BigInteger) (in.readObject()));
            RSAPrivateKeySpec rsaPrivateKeySpec = new RSAPrivateKeySpec((BigInteger) in.readObject(), (BigInteger) (in.readObject()));
            PublicKey pub = keyFactory.generatePublic(rsaPublicKeySpec);
            PrivateKey priv = keyFactory.generatePrivate(rsaPrivateKeySpec);
            keyPair = new KeyPair(pub, priv);
            return;
        } catch (Exception e) {
            Log.e(LOGTAG, "KeyPair load error", e);
        }
    }
    try {
        KeyPairGenerator gen = KeyPairGenerator.getInstance("RSA");
        gen.initialize(2048);
        keyPair = gen.generateKeyPair();
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        rsaPublicKeySpec = keyFactory.getKeySpec(keyPair.getPublic(), RSAPublicKeySpec.class);
        RSAPrivateKeySpec privateKeySpec = keyFactory.getKeySpec(keyPair.getPrivate(), RSAPrivateKeySpec.class);
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        ObjectOutputStream out = new ObjectOutputStream(bout);
        out.writeObject(rsaPublicKeySpec.getModulus());
        out.writeObject(rsaPublicKeySpec.getPublicExponent());
        out.writeObject(privateKeySpec.getModulus());
        out.writeObject(privateKeySpec.getPrivateExponent());
        out.flush();
        settings.edit().putString("keypair", Base64.encodeToString(bout.toByteArray(), Base64.DEFAULT)).commit();
        settings.edit().putBoolean("needs_register", true).commit();
    } catch (Exception e) {
        Log.wtf(LOGTAG, "KeyPair generation error", e);
        keyPair = null;
    }
}