useradmin/LdifUser.java

   1 package org.argeo.osgi.useradmin;
   2
   3 import static java.nio.charset.StandardCharsets.US_ASCII;
   4
   5 import java.math.BigInteger;
   6 import java.nio.charset.StandardCharsets;
   7 import java.util.ArrayList;
   8 import java.util.Arrays;
   9 import java.util.Base64;
  10 import java.util.Collections;
  11 import java.util.Dictionary;
  12 import java.util.Enumeration;
  13 import java.util.HashSet;
  14 import java.util.Iterator;
  15 import java.util.List;
  16 import java.util.Set;
  17 import java.util.StringJoiner;
  18
  19 import javax.naming.NamingEnumeration;
  20 import javax.naming.NamingException;
  21 import javax.naming.directory.Attribute;
  22 import javax.naming.directory.Attributes;
  23 import javax.naming.directory.BasicAttribute;
  24 import javax.naming.ldap.LdapName;
  25
  26 import org.argeo.util.naming.AuthPassword;
  27 import org.argeo.util.naming.LdapAttrs;
  28 import org.argeo.util.naming.SharedSecret;
  29
  30 /** Directory user implementation */
  31 class LdifUser implements DirectoryUser {
  32         private final AbstractUserDirectory userAdmin;
  33
  34         private final LdapName dn;
  35
  36         private final boolean frozen;
  37         private Attributes publishedAttributes;
  38
  39         private final AttributeDictionary properties;
  40         private final AttributeDictionary credentials;
  41
  42         LdifUser(AbstractUserDirectory userAdmin, LdapName dn, Attributes attributes) {
  43                 this(userAdmin, dn, attributes, false);
  44         }
  45
  46         private LdifUser(AbstractUserDirectory userAdmin, LdapName dn, Attributes attributes, boolean frozen) {
  47                 this.userAdmin = userAdmin;
  48                 this.dn = dn;
  49                 this.publishedAttributes = attributes;
  50                 properties = new AttributeDictionary(false);
  51                 credentials = new AttributeDictionary(true);
  52                 this.frozen = frozen;
  53         }
  54
  55         @Override
  56         public String getName() {
  57                 return dn.toString();
  58         }
  59
  60         @Override
  61         public int getType() {
  62                 return USER;
  63         }
  64
  65         @Override
  66         public Dictionary<String, Object> getProperties() {
  67                 return properties;
  68         }
  69
  70         @Override
  71         public Dictionary<String, Object> getCredentials() {
  72                 return credentials;
  73         }
  74
  75         @Override
  76         public boolean hasCredential(String key, Object value) {
  77                 if (key == null) {
  78                         // TODO check other sources (like PKCS12)
  79                         // String pwd = new String((char[]) value);
  80                         // authPassword (RFC 312 https://tools.ietf.org/html/rfc3112)
  81                         char[] password = DigestUtils.bytesToChars(value);
  82
  83                         if (userAdmin.getForcedPassword() != null && userAdmin.getForcedPassword().equals(new String(password)))
  84                                 return true;
  85
  86                         AuthPassword authPassword = AuthPassword.matchAuthValue(getAttributes(), password);
  87                         if (authPassword != null) {
  88                                 if (authPassword.getAuthScheme().equals(SharedSecret.X_SHARED_SECRET)) {
  89                                         SharedSecret onceToken = new SharedSecret(authPassword);
  90                                         if (onceToken.isExpired()) {
  91                                                 // AuthPassword.remove(getAttributes(), onceToken);
  92                                                 return false;
  93                                         } else {
  94                                                 // boolean wasRemoved = AuthPassword.remove(getAttributes(), onceToken);
  95                                                 return true;
  96                                         }
  97                                         // TODO delete expired tokens?
  98                                 } else {
  99                                         // TODO implement SHA
 100                                         throw new UnsupportedOperationException(
 101                                                         "Unsupported authPassword scheme " + authPassword.getAuthScheme());
 102                                 }
 103                         }
 104
 105                         // Regular password
 106 //                      byte[] hashedPassword = hash(password, DigestUtils.PASSWORD_SCHEME_PBKDF2_SHA256);
 107                         if (hasCredential(LdapAttrs.userPassword.name(), DigestUtils.charsToBytes(password)))
 108                                 return true;
 109                         return false;
 110                 }
 111
 112                 Object storedValue = getCredentials().get(key);
 113                 if (storedValue == null || value == null)
 114                         return false;
 115                 if (!(value instanceof String || value instanceof byte[]))
 116                         return false;
 117                 if (storedValue instanceof String && value instanceof String)
 118                         return storedValue.equals(value);
 119                 if (storedValue instanceof byte[] && value instanceof byte[]) {
 120                         String storedBase64 = new String((byte[]) storedValue, US_ASCII);
 121                         String passwordScheme = null;
 122                         if (storedBase64.charAt(0) == '{') {
 123                                 int index = storedBase64.indexOf('}');
 124                                 if (index > 0) {
 125                                         passwordScheme = storedBase64.substring(1, index);
 126                                         String storedValueBase64 = storedBase64.substring(index + 1);
 127                                         byte[] storedValueBytes = Base64.getDecoder().decode(storedValueBase64);
 128                                         char[] passwordValue = DigestUtils.bytesToChars((byte[]) value);
 129                                         byte[] valueBytes;
 130                                         if (DigestUtils.PASSWORD_SCHEME_SHA.equals(passwordScheme)) {
 131                                                 valueBytes = DigestUtils.toPasswordScheme(passwordScheme, passwordValue, null, null, null);
 132                                         } else if (DigestUtils.PASSWORD_SCHEME_PBKDF2_SHA256.equals(passwordScheme)) {
 133                                                 // see https://www.thesubtlety.com/post/a-389-ds-pbkdf2-password-checker/
 134                                                 byte[] iterationsArr = Arrays.copyOfRange(storedValueBytes, 0, 4);
 135                                                 BigInteger iterations = new BigInteger(iterationsArr);
 136                                                 byte[] salt = Arrays.copyOfRange(storedValueBytes, iterationsArr.length,
 137                                                                 iterationsArr.length + 64);
 138                                                 byte[] keyArr = Arrays.copyOfRange(storedValueBytes, iterationsArr.length + salt.length,
 139                                                                 storedValueBytes.length);
 140                                                 int keyLengthBits = keyArr.length * 8;
 141                                                 valueBytes = DigestUtils.toPasswordScheme(passwordScheme, passwordValue, salt,
 142                                                                 iterations.intValue(), keyLengthBits);
 143                                         } else {
 144                                                 throw new UnsupportedOperationException("Unknown password scheme " + passwordScheme);
 145                                         }
 146                                         return Arrays.equals(storedValueBytes, valueBytes);
 147                                 }
 148                         }
 149                 }
 150 //              if (storedValue instanceof byte[] && value instanceof byte[]) {
 151 //                      return Arrays.equals((byte[]) storedValue, (byte[]) value);
 152 //              }
 153                 return false;
 154         }
 155
 156         /** Hash the password */
 157         byte[] sha1hash(char[] password) {
 158                 byte[] hashedPassword = ("{SHA}"
 159                                 + Base64.getEncoder().encodeToString(DigestUtils.sha1(DigestUtils.charsToBytes(password))))
 160                                 .getBytes(StandardCharsets.UTF_8);
 161                 return hashedPassword;
 162         }
 163
 164 //      byte[] hash(char[] password, String passwordScheme) {
 165 //              if (passwordScheme == null)
 166 //                      passwordScheme = DigestUtils.PASSWORD_SCHEME_SHA;
 167 //              byte[] hashedPassword = ("{" + passwordScheme + "}"
 168 //                              + Base64.getEncoder().encodeToString(DigestUtils.toPasswordScheme(passwordScheme, password)))
 169 //                                              .getBytes(US_ASCII);
 170 //              return hashedPassword;
 171 //      }
 172
 173         @Override
 174         public LdapName getDn() {
 175                 return dn;
 176         }
 177
 178         @Override
 179         public synchronized Attributes getAttributes() {
 180                 return isEditing() ? getModifiedAttributes() : publishedAttributes;
 181         }
 182
 183         /** Should only be called from working copy thread. */
 184         private synchronized Attributes getModifiedAttributes() {
 185                 assert getWc() != null;
 186                 return getWc().getAttributes(getDn());
 187         }
 188
 189         protected synchronized boolean isEditing() {
 190                 return getWc() != null && getModifiedAttributes() != null;
 191         }
 192
 193         private synchronized UserDirectoryWorkingCopy getWc() {
 194                 return userAdmin.getWorkingCopy();
 195         }
 196
 197         protected synchronized void startEditing() {
 198                 if (frozen)
 199                         throw new UserDirectoryException("Cannot edit frozen view");
 200                 if (getUserAdmin().isReadOnly())
 201                         throw new UserDirectoryException("User directory is read-only");
 202                 assert getModifiedAttributes() == null;
 203                 getWc().startEditing(this);
 204                 // modifiedAttributes = (Attributes) publishedAttributes.clone();
 205         }
 206
 207         public synchronized void publishAttributes(Attributes modifiedAttributes) {
 208                 publishedAttributes = modifiedAttributes;
 209         }
 210
 211         public DirectoryUser getPublished() {
 212                 return new LdifUser(userAdmin, dn, publishedAttributes, true);
 213         }
 214
 215         @Override
 216         public int hashCode() {
 217                 return dn.hashCode();
 218         }
 219
 220         @Override
 221         public boolean equals(Object obj) {
 222                 if (this == obj)
 223                         return true;
 224                 if (obj instanceof LdifUser) {
 225                         LdifUser that = (LdifUser) obj;
 226                         return this.dn.equals(that.dn);
 227                 }
 228                 return false;
 229         }
 230
 231         @Override
 232         public String toString() {
 233                 return dn.toString();
 234         }
 235
 236         protected AbstractUserDirectory getUserAdmin() {
 237                 return userAdmin;
 238         }
 239
 240         private class AttributeDictionary extends Dictionary<String, Object> {
 241                 private final List<String> effectiveKeys = new ArrayList<String>();
 242                 private final List<String> attrFilter;
 243                 private final Boolean includeFilter;
 244
 245                 public AttributeDictionary(Boolean includeFilter) {
 246                         this.attrFilter = userAdmin.getCredentialAttributeIds();
 247                         this.includeFilter = includeFilter;
 248                         try {
 249                                 NamingEnumeration<String> ids = getAttributes().getIDs();
 250                                 while (ids.hasMore()) {
 251                                         String id = ids.next();
 252                                         if (includeFilter && attrFilter.contains(id))
 253                                                 effectiveKeys.add(id);
 254                                         else if (!includeFilter && !attrFilter.contains(id))
 255                                                 effectiveKeys.add(id);
 256                                 }
 257                         } catch (NamingException e) {
 258                                 throw new UserDirectoryException("Cannot initialise attribute dictionary", e);
 259                         }
 260                 }
 261
 262                 @Override
 263                 public int size() {
 264                         return effectiveKeys.size();
 265                 }
 266
 267                 @Override
 268                 public boolean isEmpty() {
 269                         return effectiveKeys.size() == 0;
 270                 }
 271
 272                 @Override
 273                 public Enumeration<String> keys() {
 274                         return Collections.enumeration(effectiveKeys);
 275                 }
 276
 277                 @Override
 278                 public Enumeration<Object> elements() {
 279                         final Iterator<String> it = effectiveKeys.iterator();
 280                         return new Enumeration<Object>() {
 281
 282                                 @Override
 283                                 public boolean hasMoreElements() {
 284                                         return it.hasNext();
 285                                 }
 286
 287                                 @Override
 288                                 public Object nextElement() {
 289                                         String key = it.next();
 290                                         return get(key);
 291                                 }
 292
 293                         };
 294                 }
 295
 296                 @Override
 297                 public Object get(Object key) {
 298                         try {
 299                                 Attribute attr = getAttributes().get(key.toString());
 300                                 if (attr == null)
 301                                         return null;
 302                                 Object value = attr.get();
 303                                 if (value instanceof byte[]) {
 304                                         if (key.equals(LdapAttrs.userPassword.name()))
 305                                                 // TODO other cases (certificates, images)
 306                                                 return value;
 307                                         value = new String((byte[]) value, StandardCharsets.UTF_8);
 308                                 }
 309                                 if (attr.size() == 1)
 310                                         return value;
 311 //                              if (!attr.getID().equals(LdapAttrs.objectClass.name()))
 312 //                                      return value;
 313                                 // special case for object class
 314                                 NamingEnumeration<?> en = attr.getAll();
 315                                 StringJoiner values = new StringJoiner("\n");
 316                                 // Set<String> values = new HashSet<String>();
 317                                 while (en.hasMore()) {
 318                                         String v = en.next().toString();
 319                                         values.add(v);
 320                                 }
 321                                 return values.toString();
 322 //                              if (objectClasses.contains(userAdmin.getUserObjectClass()))
 323 //                                      return userAdmin.getUserObjectClass();
 324 //                              else if (objectClasses.contains(userAdmin.getGroupObjectClass()))
 325 //                                      return userAdmin.getGroupObjectClass();
 326 //                              else
 327 //                                      return value;
 328                         } catch (NamingException e) {
 329                                 throw new IllegalStateException("Cannot get value for attribute " + key, e);
 330                         }
 331                 }
 332
 333                 @Override
 334                 public Object put(String key, Object value) {
 335                         if (key == null) {
 336                                 // TODO persist to other sources (like PKCS12)
 337                                 char[] password = DigestUtils.bytesToChars(value);
 338                                 byte[] hashedPassword = sha1hash(password);
 339                                 return put(LdapAttrs.userPassword.name(), hashedPassword);
 340                         }
 341                         if (key.startsWith("X-")) {
 342                                 return put(LdapAttrs.authPassword.name(), value);
 343                         }
 344
 345                         userAdmin.checkEdit();
 346                         if (!isEditing())
 347                                 startEditing();
 348
 349                         if (!(value instanceof String || value instanceof byte[]))
 350                                 throw new IllegalArgumentException("Value must be String or byte[]");
 351
 352                         if (includeFilter && !attrFilter.contains(key))
 353                                 throw new IllegalArgumentException("Key " + key + " not included");
 354                         else if (!includeFilter && attrFilter.contains(key))
 355                                 throw new IllegalArgumentException("Key " + key + " excluded");
 356
 357                         try {
 358                                 Attribute attribute = getModifiedAttributes().get(key.toString());
 359                                 // if (attribute == null) // block unit tests
 360                                 attribute = new BasicAttribute(key.toString());
 361                                 if (value instanceof String && !isAsciiPrintable(((String) value)))
 362                                         attribute.add(((String) value).getBytes(StandardCharsets.UTF_8));
 363                                 else
 364                                         attribute.add(value);
 365                                 Attribute previousAttribute = getModifiedAttributes().put(attribute);
 366                                 if (previousAttribute != null)
 367                                         return previousAttribute.get();
 368                                 else
 369                                         return null;
 370                         } catch (NamingException e) {
 371                                 throw new UserDirectoryException("Cannot get value for attribute " + key, e);
 372                         }
 373                 }
 374
 375                 @Override
 376                 public Object remove(Object key) {
 377                         userAdmin.checkEdit();
 378                         if (!isEditing())
 379                                 startEditing();
 380
 381                         if (includeFilter && !attrFilter.contains(key))
 382                                 throw new IllegalArgumentException("Key " + key + " not included");
 383                         else if (!includeFilter && attrFilter.contains(key))
 384                                 throw new IllegalArgumentException("Key " + key + " excluded");
 385
 386                         try {
 387                                 Attribute attr = getModifiedAttributes().remove(key.toString());
 388                                 if (attr != null)
 389                                         return attr.get();
 390                                 else
 391                                         return null;
 392                         } catch (NamingException e) {
 393                                 throw new UserDirectoryException("Cannot remove attribute " + key, e);
 394                         }
 395                 }
 396         }
 397
 398         private static boolean isAsciiPrintable(String str) {
 399                 if (str == null) {
 400                         return false;
 401                 }
 402                 int sz = str.length();
 403                 for (int i = 0; i < sz; i++) {
 404                         if (isAsciiPrintable(str.charAt(i)) == false) {
 405                                 return false;
 406                         }
 407                 }
 408                 return true;
 409         }
 410
 411         private static boolean isAsciiPrintable(char ch) {
 412                 return ch >= 32 && ch < 127;
 413         }
 414
 415 }