JcrUserDetailsContextMapper.java

   1 package org.argeo.security.ldap.jcr;
   2
   3 import java.security.NoSuchAlgorithmException;
   4 import java.security.SecureRandom;
   5 import java.util.Arrays;
   6 import java.util.HashMap;
   7 import java.util.Map;
   8 import java.util.Random;
   9 import java.util.SortedSet;
  10 import java.util.concurrent.Executor;
  11
  12 import javax.jcr.Node;
  13 import javax.jcr.Property;
  14 import javax.jcr.RepositoryException;
  15 import javax.jcr.Session;
  16 import javax.jcr.nodetype.NodeType;
  17
  18 import org.apache.commons.logging.Log;
  19 import org.apache.commons.logging.LogFactory;
  20 import org.argeo.ArgeoException;
  21 import org.argeo.jcr.ArgeoNames;
  22 import org.argeo.jcr.JcrUtils;
  23 import org.argeo.security.jcr.JcrUserDetails;
  24 import org.springframework.ldap.core.DirContextAdapter;
  25 import org.springframework.ldap.core.DirContextOperations;
  26 import org.springframework.security.GrantedAuthority;
  27 import org.springframework.security.context.SecurityContextHolder;
  28 import org.springframework.security.providers.encoding.PasswordEncoder;
  29 import org.springframework.security.userdetails.UserDetails;
  30 import org.springframework.security.userdetails.ldap.UserDetailsContextMapper;
  31
  32 /**
  33  * Maps LDAP attributes and JCR properties. This class is meant to be robust,
  34  * checks of which values should be mandatory should be performed at a higher
  35  * level.
  36  */
  37 public class JcrUserDetailsContextMapper implements UserDetailsContextMapper,
  38                 ArgeoNames {
  39         private final static Log log = LogFactory
  40                         .getLog(JcrUserDetailsContextMapper.class);
  41
  42         private String usernameAttribute;
  43         private String passwordAttribute;
  44         private String homeBasePath;
  45         private String[] userClasses;
  46
  47         private Map<String, String> propertyToAttributes = new HashMap<String, String>();
  48         private Executor systemExecutor;
  49         private Session session;
  50
  51         private PasswordEncoder passwordEncoder;
  52         private final Random random;
  53
  54         public JcrUserDetailsContextMapper() {
  55                 random = createRandom();
  56         }
  57
  58         private static Random createRandom() {
  59                 try {
  60                         return SecureRandom.getInstance("SHA1PRNG");
  61                 } catch (NoSuchAlgorithmException e) {
  62                         return new Random(System.currentTimeMillis());
  63                 }
  64         }
  65
  66         public UserDetails mapUserFromContext(final DirContextOperations ctx,
  67                         final String username, GrantedAuthority[] authorities) {
  68                 if (ctx == null)
  69                         throw new ArgeoException("No LDAP information found for user "
  70                                         + username);
  71
  72                 final StringBuffer userHomePathT = new StringBuffer("");
  73                 Runnable action = new Runnable() {
  74                         public void run() {
  75                                 String userHomepath = mapLdapToJcr(username, ctx);
  76                                 userHomePathT.append(userHomepath);
  77                         }
  78                 };
  79
  80                 if (SecurityContextHolder.getContext().getAuthentication() == null) {
  81                         // authentication
  82                         try {
  83                                 systemExecutor.execute(action);
  84                         } finally {
  85                                 JcrUtils.logoutQuietly(session);
  86                         }
  87                 } else {
  88                         // authenticated user
  89                         action.run();
  90                 }
  91
  92                 // password
  93                 SortedSet<?> passwordAttributes = ctx
  94                                 .getAttributeSortedStringSet(passwordAttribute);
  95                 String password;
  96                 if (passwordAttributes == null || passwordAttributes.size() == 0) {
  97                         throw new ArgeoException("No password found for user " + username);
  98                 } else {
  99                         byte[] arr = (byte[]) passwordAttributes.first();
 100                         password = new String(arr);
 101                         // erase password
 102                         Arrays.fill(arr, (byte) 0);
 103                 }
 104                 JcrUserDetails userDetails = new JcrUserDetails(
 105                                 userHomePathT.toString(), username, password, true, true, true,
 106                                 true, authorities);
 107                 return userDetails;
 108         }
 109
 110         /** @return path to the user home node */
 111         protected String mapLdapToJcr(String username, DirContextOperations ctx) {
 112                 try {
 113                         Node userHome = JcrUtils.getUserHome(session, username);
 114                         if (userHome == null)
 115                                 userHome = JcrUtils.createUserHome(session, homeBasePath,
 116                                                 username);
 117                         String userHomePath = userHome.getPath();
 118                         Node userProfile = userHome.getNode(ARGEO_PROFILE);
 119                         if (userHome.hasNode(ARGEO_PROFILE)) {
 120                                 userProfile = userHome.getNode(ARGEO_PROFILE);
 121                         } else {
 122                                 userProfile = userHome.addNode(ARGEO_PROFILE);
 123                                 userProfile.addMixin(NodeType.MIX_TITLE);
 124                                 userProfile.addMixin(NodeType.MIX_CREATED);
 125                                 userProfile.addMixin(NodeType.MIX_LAST_MODIFIED);
 126                         }
 127
 128                         for (String jcrProperty : propertyToAttributes.keySet())
 129                                 ldapToJcr(userProfile, jcrProperty, ctx);
 130
 131                         // assign default values
 132                         if (!userProfile.hasProperty(Property.JCR_DESCRIPTION))
 133                                 userProfile.setProperty(Property.JCR_DESCRIPTION, "");
 134                         if (!userProfile.hasProperty(Property.JCR_TITLE))
 135                                 userProfile.setProperty(Property.JCR_TITLE, userProfile
 136                                                 .getProperty(ARGEO_FIRST_NAME).getString()
 137                                                 + " "
 138                                                 + userProfile.getProperty(ARGEO_LAST_NAME).getString());
 139
 140                         session.save();
 141                         if (log.isTraceEnabled())
 142                                 log.trace("Mapped " + ctx.getDn() + " to " + userProfile);
 143                         return userHomePath;
 144                 } catch (Exception e) {
 145                         JcrUtils.discardQuietly(session);
 146                         throw new ArgeoException("Cannot synchronize JCR and LDAP", e);
 147                 }
 148         }
 149
 150         public void mapUserToContext(UserDetails user, final DirContextAdapter ctx) {
 151                 if (!(user instanceof JcrUserDetails))
 152                         throw new ArgeoException("Unsupported user details: "
 153                                         + user.getClass());
 154
 155                 ctx.setAttributeValues("objectClass", userClasses);
 156                 ctx.setAttributeValue(usernameAttribute, user.getUsername());
 157                 ctx.setAttributeValue(passwordAttribute,
 158                                 encodePassword(user.getPassword()));
 159
 160                 final JcrUserDetails jcrUserDetails = (JcrUserDetails) user;
 161                 try {
 162                         Node userProfile = session.getNode(jcrUserDetails.getHomePath()
 163                                         + '/' + ARGEO_PROFILE);
 164                         for (String jcrProperty : propertyToAttributes.keySet())
 165                                 jcrToLdap(userProfile, jcrProperty, ctx);
 166
 167                         if (log.isTraceEnabled())
 168                                 log.trace("Mapped " + userProfile + " to " + ctx.getDn());
 169                 } catch (RepositoryException e) {
 170                         throw new ArgeoException("Cannot synchronize JCR and LDAP", e);
 171                 }
 172         }
 173
 174         protected String encodePassword(String password) {
 175                 if (!password.startsWith("{")) {
 176                         byte[] salt = new byte[16];
 177                         random.nextBytes(salt);
 178                         return passwordEncoder.encodePassword(password, salt);
 179                 } else {
 180                         return password;
 181                 }
 182         }
 183
 184         protected void ldapToJcr(Node userProfile, String jcrProperty,
 185                         DirContextOperations ctx) {
 186                 try {
 187                         String ldapAttribute;
 188                         if (propertyToAttributes.containsKey(jcrProperty))
 189                                 ldapAttribute = propertyToAttributes.get(jcrProperty);
 190                         else
 191                                 throw new ArgeoException(
 192                                                 "No LDAP attribute mapped for JCR proprty "
 193                                                                 + jcrProperty);
 194
 195                         String value = ctx.getStringAttribute(ldapAttribute);
 196                         if (value == null)
 197                                 return;
 198                         userProfile.setProperty(jcrProperty, value);
 199                 } catch (Exception e) {
 200                         throw new ArgeoException("Cannot map JCR property " + jcrProperty
 201                                         + " from LDAP", e);
 202                 }
 203         }
 204
 205         protected void jcrToLdap(Node userProfile, String jcrProperty,
 206                         DirContextOperations ctx) {
 207                 try {
 208                         String ldapAttribute;
 209                         if (propertyToAttributes.containsKey(jcrProperty))
 210                                 ldapAttribute = propertyToAttributes.get(jcrProperty);
 211                         else
 212                                 throw new ArgeoException(
 213                                                 "No LDAP attribute mapped for JCR proprty "
 214                                                                 + jcrProperty);
 215
 216                         // fix issue with empty 'sn' in LDAP
 217                         if (ldapAttribute.equals("sn")
 218                                         && (!userProfile.hasProperty(jcrProperty) || userProfile
 219                                                         .getProperty(jcrProperty).getString().trim()
 220                                                         .equals("")))
 221                                 userProfile.setProperty(jcrProperty, "empty");
 222
 223                         if (ldapAttribute.equals("description")) {
 224                                 String value = userProfile.getProperty(jcrProperty).getString();
 225                                 if (value.trim().equals(""))
 226                                         return;
 227                         }
 228
 229                         if (!userProfile.hasProperty(jcrProperty))
 230                                 return;
 231                         String value = userProfile.getProperty(jcrProperty).getString();
 232
 233                         ctx.setAttributeValue(ldapAttribute, value);
 234                 } catch (Exception e) {
 235                         throw new ArgeoException("Cannot map JCR property " + jcrProperty
 236                                         + " from LDAP", e);
 237                 }
 238         }
 239
 240         public void setPropertyToAttributes(Map<String, String> propertyToAttributes) {
 241                 this.propertyToAttributes = propertyToAttributes;
 242         }
 243
 244         public void setSystemExecutor(Executor systemExecutor) {
 245                 this.systemExecutor = systemExecutor;
 246         }
 247
 248         public void setHomeBasePath(String homeBasePath) {
 249                 this.homeBasePath = homeBasePath;
 250         }
 251
 252         public void setUsernameAttribute(String usernameAttribute) {
 253                 this.usernameAttribute = usernameAttribute;
 254         }
 255
 256         public void setPasswordAttribute(String passwordAttribute) {
 257                 this.passwordAttribute = passwordAttribute;
 258         }
 259
 260         public void setUserClasses(String[] userClasses) {
 261                 this.userClasses = userClasses;
 262         }
 263
 264         public void setPasswordEncoder(PasswordEncoder passwordEncoder) {
 265                 this.passwordEncoder = passwordEncoder;
 266         }
 267
 268         public void setSession(Session session) {
 269                 this.session = session;
 270         }
 271
 272 }