src/org/cacert/gigi/pages/LoginPage.java

   1 package org.cacert.gigi.pages;
   2
   3 import static org.cacert.gigi.Gigi.*;
   4
   5 import java.io.IOException;
   6 import java.io.PrintWriter;
   7 import java.security.cert.X509Certificate;
   8 import java.util.HashMap;
   9 import java.util.Map;
  10
  11 import javax.servlet.http.HttpServletRequest;
  12 import javax.servlet.http.HttpServletResponse;
  13 import javax.servlet.http.HttpSession;
  14
  15 import org.cacert.gigi.GigiApiException;
  16 import org.cacert.gigi.database.GigiPreparedStatement;
  17 import org.cacert.gigi.database.GigiResultSet;
  18 import org.cacert.gigi.dbObjects.CertificateOwner;
  19 import org.cacert.gigi.dbObjects.Group;
  20 import org.cacert.gigi.dbObjects.User;
  21 import org.cacert.gigi.localisation.Language;
  22 import org.cacert.gigi.output.template.Form;
  23 import org.cacert.gigi.output.template.TranslateCommand;
  24 import org.cacert.gigi.pages.main.RegisterPage;
  25 import org.cacert.gigi.util.AuthorizationContext;
  26 import org.cacert.gigi.util.PasswordHash;
  27 import org.cacert.gigi.util.RateLimit;
  28 import org.cacert.gigi.util.RateLimit.RateLimitException;
  29 import org.cacert.gigi.util.ServerConstants;
  30
  31 public class LoginPage extends Page {
  32
  33     public static final RateLimit RATE_LIMIT = new RateLimit(10, 5 * 60 * 1000);
  34
  35     public class LoginForm extends Form {
  36
  37         public LoginForm(HttpServletRequest hsr) {
  38             super(hsr);
  39         }
  40
  41         @Override
  42         public RedirectResult submit(HttpServletRequest req) throws GigiApiException {
  43             if (RegisterPage.RATE_LIMIT.isLimitExceeded(req.getRemoteAddr())) {
  44                 throw new RateLimitException();
  45             }
  46             tryAuthWithUnpw(req);
  47             return new RedirectResult(redirectPath(req));
  48         }
  49
  50         @Override
  51         protected void outputContent(PrintWriter out, Language l, Map<String, Object> vars) {
  52             getDefaultTemplate().output(out, l, vars);
  53         }
  54
  55     }
  56
  57     public static final String LOGIN_RETURNPATH = "login-returnpath";
  58
  59     public LoginPage() {
  60         super("Password Login");
  61     }
  62
  63     @Override
  64     public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
  65         if (req.getHeader("Host").equals(ServerConstants.getSecureHostNamePort())) {
  66             resp.getWriter().println(getLanguage(req).getTranslation("Authentication with certificate failed. Try another certificate or use a password."));
  67         } else {
  68             new LoginForm(req).output(resp.getWriter(), getLanguage(req), new HashMap<String, Object>());
  69         }
  70     }
  71
  72     @Override
  73     public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
  74         if (Form.printFormErrors(req, resp.getWriter())) {
  75             Form.getForm(req, LoginForm.class).output(resp.getWriter(), getLanguage(req), new HashMap<String, Object>());
  76         }
  77     }
  78
  79     @Override
  80     public boolean beforeTemplate(HttpServletRequest req, HttpServletResponse resp) throws IOException {
  81         if (req.getSession().getAttribute("loggedin") == null) {
  82             X509Certificate cert = getCertificateFromRequest(req);
  83             if (cert != null) {
  84                 tryAuthWithCertificate(req, cert);
  85             }
  86             if (req.getMethod().equals("POST")) {
  87                 return Form.getForm(req, LoginForm.class).submitExceptionProtected(req, resp);
  88             }
  89         }
  90
  91         if (req.getSession().getAttribute("loggedin") != null) {
  92             resp.sendRedirect(redirectPath(req));
  93             return true;
  94         }
  95         return false;
  96     }
  97
  98     private static String redirectPath(HttpServletRequest req) {
  99         String redir = (String) req.getSession().getAttribute(LOGIN_RETURNPATH);
 100         String s = redir;
 101         if (s != null) {
 102             if ( !s.startsWith("/")) {
 103                 s = "/" + s;
 104             }
 105             return s;
 106         } else {
 107             return "/";
 108         }
 109     }
 110
 111     @Override
 112     public boolean needsLogin() {
 113         return false;
 114     }
 115
 116     private void tryAuthWithUnpw(HttpServletRequest req) throws GigiApiException {
 117         String un = req.getParameter("username");
 118         String pw = req.getParameter("password");
 119         try (GigiPreparedStatement ps = new GigiPreparedStatement("SELECT `password`, `id` FROM `users` WHERE `email`=? AND verified='1'")) {
 120             ps.setString(1, un);
 121             GigiResultSet rs = ps.executeQuery();
 122             if (rs.next()) {
 123                 String dbHash = rs.getString(1);
 124                 String hash = PasswordHash.verifyHash(pw, dbHash);
 125                 if (hash != null) {
 126                     if ( !hash.equals(dbHash)) {
 127                         try (GigiPreparedStatement gps = new GigiPreparedStatement("UPDATE `users` SET `password`=? WHERE `email`=?")) {
 128                             gps.setString(1, hash);
 129                             gps.setString(2, un);
 130                             gps.executeUpdate();
 131                         }
 132                     }
 133                     loginSession(req, User.getById(rs.getInt(2)));
 134                     req.getSession().setAttribute(LOGIN_METHOD, new TranslateCommand("Password"));
 135                     return;
 136                 }
 137             }
 138         }
 139         throw new GigiApiException("Username and password didn't match.");
 140     }
 141
 142     public static User getUser(HttpServletRequest req) {
 143         AuthorizationContext ac = getAuthorizationContext(req);
 144         if (ac == null) {
 145             return null;
 146         }
 147         return ac.getActor();
 148     }
 149
 150     public static AuthorizationContext getAuthorizationContext(HttpServletRequest req) {
 151         return ((AuthorizationContext) req.getSession().getAttribute(AUTH_CONTEXT));
 152     }
 153
 154     private void tryAuthWithCertificate(HttpServletRequest req, X509Certificate x509Certificate) {
 155         String serial = extractSerialFormCert(x509Certificate);
 156         User user = fetchUserBySerial(serial);
 157         if (user == null) {
 158             return;
 159         }
 160         loginSession(req, user);
 161         req.getSession().setAttribute(CERT_SERIAL, serial);
 162         req.getSession().setAttribute(CERT_ISSUER, x509Certificate.getIssuerDN());
 163         req.getSession().setAttribute(LOGIN_METHOD, new TranslateCommand("Certificate"));
 164     }
 165
 166     public static String extractSerialFormCert(X509Certificate x509Certificate) {
 167         return x509Certificate.getSerialNumber().toString(16).toUpperCase();
 168     }
 169
 170     public static User fetchUserBySerial(String serial) {
 171         if ( !serial.matches("[A-Fa-f0-9]+")) {
 172             throw new Error("serial malformed.");
 173         }
 174
 175         CertificateOwner o = CertificateOwner.getByEnabledSerial(serial);
 176         if (o == null || !(o instanceof User)) {
 177             return null;
 178         }
 179         return (User) o;
 180     }
 181
 182     public static X509Certificate getCertificateFromRequest(HttpServletRequest req) {
 183         X509Certificate[] cert = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 184         X509Certificate uc = null;
 185         if (cert != null && cert[0] != null) {
 186             uc = cert[0];
 187         }
 188         return uc;
 189     }
 190
 191     private static final Group LOGIN_BLOCKED = Group.BLOCKEDLOGIN;
 192
 193     private void loginSession(HttpServletRequest req, User user) {
 194         if (user.isInGroup(LOGIN_BLOCKED)) {
 195             return;
 196         }
 197         req.getSession().invalidate();
 198         HttpSession hs = req.getSession();
 199         hs.setAttribute(LOGGEDIN, true);
 200         hs.setAttribute(Language.SESSION_ATTRIB_NAME, user.getPreferredLocale());
 201         hs.setAttribute(AUTH_CONTEXT, new AuthorizationContext(user, user));
 202     }
 203
 204     @Override
 205     public boolean isPermitted(AuthorizationContext ac) {
 206         return ac == null;
 207     }
 208 }