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