Skip to content
Snippets Groups Projects
Select Git revision
  • 490493b26dd4cac9de181f9da25d7c9320991f60
  • master default protected
  • react
3 results

UserAuthenticationModule.java

Blame
  • Léo Banno-Cloutier's avatar
    Léo Banno-Cloutier authored
    Change-Id: I2c89c734d72c2d9fa1f60d0f12496b5e451fd44d
    490493b2
    History
    Code owners
    Assign users and groups as approvers for specific file changes. Learn more.
    UserAuthenticationModule.java 12.35 KiB
    /*
     * Copyright (C) 2020 by Savoir-faire Linux
     * Authors: William Enright <william.enright@savoirfairelinux.com>
     *          Ndeye Anna Ndiaye <anna.ndiaye@savoirfairelinux.com>
     *          Johnny Flores <johnny.flores@savoirfairelinux.com>
     *          Mohammed Raza <mohammed.raza@savoirfairelinux.com>
     *          Felix Sidokhine <felix.sidokhine@savoirfairelinux.com>
     *
     *
     * This program is free software; you can redistribute it and/or modify
     * it under the terms of the GNU General Public License as published by
     * the Free Software Foundation; either version 3 of the License, or
     * (at your option) any later version.
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     * GNU General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program.  If not, see <https://www.gnu.org/licenses/>.
     */
    package net.jami.jams.authmodule;
    
    import com.nimbusds.jwt.SignedJWT;
    
    import lombok.extern.slf4j.Slf4j;
    
    import net.jami.datastore.main.DataStore;
    import net.jami.jams.common.authentication.AuthenticationSource;
    import net.jami.jams.common.authentication.AuthenticationSourceType;
    import net.jami.jams.common.authmodule.AuthModuleKey;
    import net.jami.jams.common.authmodule.AuthTokenResponse;
    import net.jami.jams.common.authmodule.AuthenticationModule;
    import net.jami.jams.common.cryptoengineapi.CertificateAuthority;
    import net.jami.jams.common.dao.StatementElement;
    import net.jami.jams.common.dao.StatementList;
    import net.jami.jams.common.jami.NameServer;
    import net.jami.jams.common.objects.user.AccessLevel;
    import net.jami.jams.common.objects.user.User;
    import net.jami.jams.common.utils.LibraryLoader;
    import net.jami.jams.common.utils.X509Utils;
    
    import org.apache.commons.codec.binary.Base64;
    import org.bouncycastle.cert.X509CRLHolder;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.InputStream;
    import java.io.OutputStream;
    import java.security.KeyPair;
    import java.security.KeyPairGenerator;
    import java.security.PrivateKey;
    import java.security.PublicKey;
    import java.security.cert.X509Certificate;
    import java.security.interfaces.RSAPublicKey;
    import java.util.concurrent.ConcurrentHashMap;
    
    @Slf4j
    public class UserAuthenticationModule implements AuthenticationModule {
        // This contains the DOMAIN-SOURCE.
        // In general there is at most 2 here.
        private static final String LDAP_CONNECTOR_CLASS = "net.jami.jams.ldap.connector.LDAPConnector";
        private static final String AD_CONNECTOR_CLASS = "net.jami.jams.ad.connector.ADConnector";
        public static DataStore datastore;
        public static CertificateAuthority certificateAuthority;
        private final TokenController tokenController;
        private PrivateKey privateKey = null;
        private PublicKey publicKey = null;
        // The data storage layer for tokens.
    
        private final ConcurrentHashMap<AuthModuleKey, AuthenticationSource> authenticationSources =
                new ConcurrentHashMap<>();
    
        public UserAuthenticationModule(DataStore dataStore, CertificateAuthority certificateAuthority)
                throws Exception {
            UserAuthenticationModule.datastore = dataStore;
            UserAuthenticationModule.certificateAuthority = certificateAuthority;
            authenticationSources.put(
                    new AuthModuleKey("LOCAL", AuthenticationSourceType.LOCAL), datastore);
            log.info("Started authentication module - default local source is already enabled!");
    
            File pubkeyFile = new File(System.getProperty("user.dir") + File.separator + "oauth.pub");
            File privateKeyFile =
                    new File(System.getProperty("user.dir") + File.separator + "oauth.key");
    
            if (!privateKeyFile.exists() || !pubkeyFile.exists()) {
                log.info("Generating first time private/public keys for OAuth!");
                KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
                keyPairGenerator.initialize(4096);
                KeyPair kp = keyPairGenerator.generateKeyPair();
                privateKey = kp.getPrivate();
                publicKey = kp.getPublic();
                // Store these to file.
                OutputStream os;
                os =
                        new FileOutputStream(
                                System.getProperty("user.dir") + File.separator + "oauth.key");
                os.write(X509Utils.getPEMStringFromPrivateKey(privateKey).getBytes());
                os.flush();
                os.close();
                log.info("Succesfully stored OAuth private key for future use...");
                os =
                        new FileOutputStream(
                                System.getProperty("user.dir") + File.separator + "oauth.pub");
                os.write(X509Utils.getPEMStringFromPubKey(publicKey).getBytes());
                os.flush();
                os.close();
                log.info("Succesfully stored OAuth public key for future use...");
            } else {
                InputStream privateInput = new FileInputStream(privateKeyFile);
                privateKey = X509Utils.getKeyFromPEMString(new String(privateInput.readAllBytes()));
                privateInput.close();
                log.info("Succesfully loaded OAuth private key!");
    
                InputStream publicInput = new FileInputStream(pubkeyFile);
                publicKey = X509Utils.getPubKeyFromPEMString(new String(publicInput.readAllBytes()));
                publicInput.close();
                log.info("Succesfully loaded OAuth public key!");
            }
            // TODO: Read signing key, if file does not exist create it (also create the corresponding
            // public key)
            tokenController = new TokenController(privateKey);
            // Also expose the public key programatically.
            log.info("OAuth2 Token System instantiated succesfully!");
        }
    
        @Override
        public void attachAuthSource(AuthenticationSourceType type, String settings) {
            switch (type) {
                case AD:
                    loadAuthConnector(AD_CONNECTOR_CLASS, settings);
                    break;
                case LDAP:
                    loadAuthConnector(LDAP_CONNECTOR_CLASS, settings);
                    break;
                default:
                    break;
            }
        }
    
        private void loadAuthConnector(String className, String settings) {
            try {
                Class<?> cls = LibraryLoader.classLoader.loadClass(className);
                AuthenticationSource source =
                        (AuthenticationSource) cls.getConstructor(String.class).newInstance(settings);
                authenticationSources.put(
                        new AuthModuleKey(
                                source.getInfo().getRealm(),
                                source.getInfo().getAuthenticationSourceType()),
                        source);
            } catch (Exception e) {
                log.error("Could not load connector " + className + " with reason: " + e);
            }
        }
    
        @Override
        public AuthTokenResponse authenticateUser(String username, String password) {
            AuthTokenResponse res = null;
            String hashPass = "";
            if (datastore.userExists(username)) {
                StatementList statementList = new StatementList();
                StatementElement statementElement = new StatementElement("username", "=", username, "");
                statementList.addStatement(statementElement);
                User user = datastore.getUserDao().getObjects(statementList).get(0);
                if ((user.getUserType() == AuthenticationSourceType.LOCAL))
                    hashPass = PasswordUtil.hashPassword(password, Base64.decodeBase64(user.getSalt()));
                else hashPass = password;
    
                if (hashPass != null
                        && authenticationSources
                                .get(new AuthModuleKey(user.getRealm(), user.getUserType()))
                                .authenticate(username, hashPass))
                    return tokenController.getToken(user, null);
            }
            // The second case is much more violent, because we don't know in advance "where" this user
            // comes
            // from, so we have to infer (this is only really true for "users", all others are usually
            // pre-marked)
            // This is also the case when we store the user into the DAO - because he never existed
            // before.
            for (AuthModuleKey key : authenticationSources.keySet()) {
                if (authenticationSources.get(key).authenticate(username, password)) {
                    User user = new User();
                    user.setUsername(username);
                    user.setAccessLevel(AccessLevel.USER);
                    user.setRealm(key.getRealm());
                    user.setUserType(key.getType());
                    // This is legal with a null ONLY because in this case there is no relation with a
                    // external server.
                    RegisterUserFlow.createUser(user, null);
                    return tokenController.getToken(user, null);
                }
            }
            return res;
        }
    
        @Override
        public AuthTokenResponse authenticateUser(
                X509Certificate[] certificates, X509CRLHolder crl, X509Certificate ca) {
            // Extract the username for the certificate and verify that it is not revoked.
            X509Certificate clientCert = certificates[1];
            X509Certificate deviceCert = certificates[0];
            try {
                // Check if the certificate is even valid.
                clientCert.checkValidity();
                // Check if the certificate was provided by a valid authority.
                clientCert.verify(ca.getPublicKey());
                // Here we need to make a request to the CRL to find out if it has been revoked.
                if (crl.getRevokedCertificate(clientCert.getSerialNumber()) != null) return null;
                String username = X509Utils.extractDNFromCertificate(clientCert).get("CN");
                // We need to extract the deviceId from the certificate
                StatementList statementList = new StatementList();
                StatementElement statementElement = new StatementElement("username", "=", username, "");
                statementList.addStatement(statementElement);
                User user = datastore.getUserDao().getObjects(statementList).get(0);
                return tokenController.getToken(
                        user, X509Utils.extractDNFromCertificate(deviceCert).get("UID"));
            } catch (Exception e) {
                return null;
            }
        }
    
        @Override
        public ConcurrentHashMap<AuthModuleKey, AuthenticationSource> getAuthSources() {
            return authenticationSources;
        }
    
        @Override
        public boolean testModuleConfiguration(AuthenticationSourceType type, String settings) {
            try {
                String className = "";
                if (type.equals(AuthenticationSourceType.AD)) className = AD_CONNECTOR_CLASS;
                if (type.equals(AuthenticationSourceType.LDAP)) className = LDAP_CONNECTOR_CLASS;
                Class<?> cls = LibraryLoader.classLoader.loadClass(className);
                AuthenticationSource source =
                        (AuthenticationSource) cls.getConstructor(String.class).newInstance(settings);
                return source.test();
            } catch (Exception e) {
                log.error("The testing of the source was unsuccessful: " + e);
                return false;
            }
        }
    
        @Override
        public boolean createUser(
                AuthenticationSourceType type, String realm, NameServer nameServer, User user) {
            // This concept doesn't exist for LDAP or AD or any other hosted directory, in this case we
            // simply run
            // very theoretically, we should allow LDAP to publish to the public registry, but this is a
            // lot
            // more complex.
            return RegisterUserFlow.createUser(user, nameServer);
        }
    
        @Override
        public RSAPublicKey getAuthModulePubKey() {
            return (RSAPublicKey) publicKey;
        }
    
        @Override
        public char[] getOTP(String username) {
            if (datastore.userExists(username)) {
                StatementList statementList = new StatementList();
                StatementElement statementElement = new StatementElement("username", "=", username, "");
                statementList.addStatement(statementElement);
                User user = datastore.getUserDao().getObjects(statementList).get(0);
                return (user.getPassword()).toCharArray();
            }
            return new char[0];
        }
    
        @Override
        public boolean verifyToken(SignedJWT token) {
            return false;
        }
    
        @Override
        public void deleteToken(SignedJWT token) {}
    }