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.DatabaseConnection;
  17 import org.cacert.gigi.database.GigiPreparedStatement;
  18 import org.cacert.gigi.database.GigiResultSet;
  19 import org.cacert.gigi.dbObjects.CertificateOwner;
  20 import org.cacert.gigi.dbObjects.Group;
  21 import org.cacert.gigi.dbObjects.User;
  22 import org.cacert.gigi.localisation.Language;
  23 import org.cacert.gigi.output.template.Form;
  24 import org.cacert.gigi.util.AuthorizationContext;
  25 import org.cacert.gigi.util.PasswordHash;
  26 import org.cacert.gigi.util.ServerConstants;
  27
  28 public class LoginPage extends Page {
  29
  30     public class LoginForm extends Form {
  31
  32         public LoginForm(HttpServletRequest hsr) {
  33             super(hsr);
  34         }
  35
  36         @Override
  37         public boolean submit(PrintWriter out, HttpServletRequest req) throws GigiApiException {
  38             tryAuthWithUnpw(req);
  39             return false;
  40         }
  41
  42         @Override
  43         protected void outputContent(PrintWriter out, Language l, Map<String, Object> vars) {
  44             getDefaultTemplate().output(out, l, vars);
  45         }
  46
  47     }
  48
  49     public static final String LOGIN_RETURNPATH = "login-returnpath";
  50
  51     public LoginPage(String title) {
  52         super(title);
  53     }
  54
  55     @Override
  56     public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
  57         if (req.getHeader("Host").equals(ServerConstants.getSecureHostNamePort())) {
  58             resp.getWriter().println(getLanguage(req).getTranslation("Authentication with certificate failed. Try another certificate or use a password."));
  59         } else {
  60             new LoginForm(req).output(resp.getWriter(), getLanguage(req), new HashMap<String, Object>());
  61         }
  62     }
  63
  64     @Override
  65     public boolean beforeTemplate(HttpServletRequest req, HttpServletResponse resp) throws IOException {
  66         String redir = (String) req.getSession().getAttribute(LOGIN_RETURNPATH);
  67         if (req.getSession().getAttribute("loggedin") == null) {
  68             X509Certificate cert = getCertificateFromRequest(req);
  69             if (cert != null) {
  70                 tryAuthWithCertificate(req, cert);
  71             }
  72             if (req.getMethod().equals("POST")) {
  73                 try {
  74                     Form.getForm(req, LoginForm.class).submit(resp.getWriter(), req);
  75                 } catch (GigiApiException e) {
  76                 }
  77             }
  78         }
  79
  80         if (req.getSession().getAttribute("loggedin") != null) {
  81             String s = redir;
  82             if (s != null) {
  83                 if ( !s.startsWith("/")) {
  84                     s = "/" + s;
  85                 }
  86                 resp.sendRedirect(s);
  87             } else {
  88                 resp.sendRedirect("/");
  89             }
  90             return true;
  91         }
  92         return false;
  93     }
  94
  95     @Override
  96     public boolean needsLogin() {
  97         return false;
  98     }
  99
 100     private void tryAuthWithUnpw(HttpServletRequest req) {
 101         String un = req.getParameter("username");
 102         String pw = req.getParameter("password");
 103         GigiPreparedStatement ps = DatabaseConnection.getInstance().prepare("SELECT `password`, `id` FROM `users` WHERE `email`=? AND verified='1'");
 104         ps.setString(1, un);
 105         GigiResultSet rs = ps.executeQuery();
 106         if (rs.next()) {
 107             String dbHash = rs.getString(1);
 108             String hash = PasswordHash.verifyHash(pw, dbHash);
 109             if (hash != null) {
 110                 if ( !hash.equals(dbHash)) {
 111                     GigiPreparedStatement gps = DatabaseConnection.getInstance().prepare("UPDATE `users` SET `password`=? WHERE `email`=?");
 112                     gps.setString(1, hash);
 113                     gps.setString(2, un);
 114                     gps.executeUpdate();
 115                 }
 116                 loginSession(req, User.getById(rs.getInt(2)));
 117                 req.getSession().setAttribute(LOGIN_METHOD, "Password");
 118             }
 119         }
 120         rs.close();
 121     }
 122
 123     public static User getUser(HttpServletRequest req) {
 124         AuthorizationContext ac = getAuthorizationContext(req);
 125         if (ac == null) {
 126             return null;
 127         }
 128         return ac.getActor();
 129     }
 130
 131     public static AuthorizationContext getAuthorizationContext(HttpServletRequest req) {
 132         return ((AuthorizationContext) req.getSession().getAttribute(AUTH_CONTEXT));
 133     }
 134
 135     private void tryAuthWithCertificate(HttpServletRequest req, X509Certificate x509Certificate) {
 136         String serial = extractSerialFormCert(x509Certificate);
 137         User user = fetchUserBySerial(serial);
 138         if (user == null) {
 139             return;
 140         }
 141         loginSession(req, user);
 142         req.getSession().setAttribute(CERT_SERIAL, serial);
 143         req.getSession().setAttribute(CERT_ISSUER, x509Certificate.getIssuerDN());
 144         req.getSession().setAttribute(LOGIN_METHOD, "Certificate");
 145     }
 146
 147     public static String extractSerialFormCert(X509Certificate x509Certificate) {
 148         return x509Certificate.getSerialNumber().toString(16).toUpperCase();
 149     }
 150
 151     public static User fetchUserBySerial(String serial) {
 152         if ( !serial.matches("[A-Fa-f0-9]+")) {
 153             throw new Error("serial malformed.");
 154         }
 155
 156         CertificateOwner o = CertificateOwner.getByEnabledSerial(serial);
 157         if (o == null || !(o instanceof User)) {
 158             return null;
 159         }
 160         return (User) o;
 161     }
 162
 163     public static X509Certificate getCertificateFromRequest(HttpServletRequest req) {
 164         X509Certificate[] cert = (X509Certificate[]) req.getAttribute("javax.servlet.request.X509Certificate");
 165         X509Certificate uc = null;
 166         if (cert != null && cert[0] != null) {
 167             uc = cert[0];
 168         }
 169         return uc;
 170     }
 171
 172     private static final Group LOGIN_BLOCKED = Group.getByString("blockedlogin");
 173
 174     private void loginSession(HttpServletRequest req, User user) {
 175         if (user.isInGroup(LOGIN_BLOCKED)) {
 176             return;
 177         }
 178         req.getSession().invalidate();
 179         HttpSession hs = req.getSession();
 180         hs.setAttribute(LOGGEDIN, true);
 181         hs.setAttribute(Language.SESSION_ATTRIB_NAME, user.getPreferredLocale());
 182         hs.setAttribute(AUTH_CONTEXT, new AuthorizationContext(user, user));
 183     }
 184
 185     @Override
 186     public boolean isPermitted(AuthorizationContext ac) {
 187         return ac == null;
 188     }
 189 }