server/runtime/org.argeo.server.jcr/src/main/java/org/argeo/jcr/security/JcrKeyring.java

   1 package org.argeo.jcr.security;
   2
   3 import java.io.ByteArrayInputStream;
   4 import java.io.InputStream;
   5 import java.security.SecureRandom;
   6
   7 import javax.crypto.Cipher;
   8 import javax.crypto.CipherInputStream;
   9 import javax.crypto.SecretKey;
  10 import javax.crypto.spec.IvParameterSpec;
  11 import javax.jcr.Binary;
  12 import javax.jcr.Node;
  13 import javax.jcr.Property;
  14 import javax.jcr.RepositoryException;
  15 import javax.jcr.Session;
  16
  17 import org.apache.commons.io.IOUtils;
  18 import org.argeo.ArgeoException;
  19 import org.argeo.jcr.ArgeoNames;
  20 import org.argeo.jcr.ArgeoTypes;
  21 import org.argeo.jcr.JcrUtils;
  22 import org.argeo.util.crypto.AbstractKeyring;
  23 import org.argeo.util.crypto.PBEKeySpecCallback;
  24
  25 /** JCR based implementation of a keyring */
  26 public class JcrKeyring extends AbstractKeyring implements ArgeoNames {
  27         private Session session;
  28
  29         /**
  30          * When setup is called the session has not yet been saved and we don't want
  31          * to save it since there maybe other data which would be inconsistent. So
  32          * we keep a reference to this node which will then be used (an reset to
  33          * null) when handling the PBE callback. We keep one per thread in case
  34          * multiple users are accessing the same instance of a keyring.
  35          */
  36         private ThreadLocal<Node> notYetSavedKeyring = new ThreadLocal<Node>() {
  37
  38                 @Override
  39                 protected Node initialValue() {
  40                         return null;
  41                 }
  42         };
  43
  44         @Override
  45         protected Boolean isSetup() {
  46                 try {
  47                         if (notYetSavedKeyring.get() != null)
  48                                 return true;
  49
  50                         Node userHome = JcrUtils.getUserHome(session);
  51                         return userHome.hasNode(ARGEO_KEYRING);
  52                 } catch (RepositoryException e) {
  53                         throw new ArgeoException("Cannot check whether keyring is setup", e);
  54                 }
  55         }
  56
  57         @Override
  58         protected void setup(char[] password) {
  59                 Binary binary = null;
  60                 InputStream in = null;
  61                 try {
  62                         Node userHome = JcrUtils.getUserHome(session);
  63                         if (userHome.hasNode(ARGEO_KEYRING))
  64                                 throw new ArgeoException("Keyring already setup");
  65                         Node keyring = userHome.addNode(ARGEO_KEYRING);
  66                         keyring.addMixin(ArgeoTypes.ARGEO_PBE_SPEC);
  67
  68                         // deterministic salt and iteration count based on username
  69                         String username = session.getUserID();
  70                         byte[] salt = new byte[8];
  71                         byte[] usernameBytes = username.getBytes();
  72                         for (int i = 0; i < salt.length; i++) {
  73                                 if (i < usernameBytes.length)
  74                                         salt[i] = usernameBytes[i];
  75                                 else
  76                                         salt[i] = 0;
  77                         }
  78                         in = new ByteArrayInputStream(salt);
  79                         binary = session.getValueFactory().createBinary(in);
  80                         keyring.setProperty(ARGEO_SALT, binary);
  81
  82                         Integer iterationCount = username.length() * 200;
  83                         keyring.setProperty(ARGEO_ITERATION_COUNT, iterationCount);
  84
  85                         // default algo
  86                         // TODO check if algo and key length are available, use DES if not
  87                         keyring.setProperty(ARGEO_SECRET_KEY_FACTORY, "PBKDF2WithHmacSHA1");
  88                         keyring.setProperty(ARGEO_KEY_LENGTH, 256l);
  89                         keyring.setProperty(ARGEO_SECRET_KEY_ENCRYPTION, "AES");
  90                         keyring.setProperty(ARGEO_CIPHER, "AES/CBC/PKCS5Padding");
  91
  92                         // encrypted password hash
  93                         // IOUtils.closeQuietly(in);
  94                         // JcrUtils.closeQuietly(binary);
  95                         // byte[] btPass = hash(password, salt, iterationCount);
  96                         // in = new ByteArrayInputStream(btPass);
  97                         // binary = session.getValueFactory().createBinary(in);
  98                         // keyring.setProperty(ARGEO_PASSWORD, binary);
  99
 100                         notYetSavedKeyring.set(keyring);
 101                 } catch (Exception e) {
 102                         throw new ArgeoException("Cannot setup keyring", e);
 103                 } finally {
 104                         JcrUtils.closeQuietly(binary);
 105                         IOUtils.closeQuietly(in);
 106                         // JcrUtils.discardQuietly(session);
 107                 }
 108         }
 109
 110         @Override
 111         protected void handleKeySpecCallback(PBEKeySpecCallback pbeCallback) {
 112                 try {
 113                         Node userHome = JcrUtils.getUserHome(session);
 114                         Node keyring;
 115                         if (userHome.hasNode(ARGEO_KEYRING))
 116                                 keyring = userHome.getNode(ARGEO_KEYRING);
 117                         else if (notYetSavedKeyring.get() != null)
 118                                 keyring = notYetSavedKeyring.get();
 119                         else
 120                                 throw new ArgeoException("Keyring not setup");
 121
 122                         pbeCallback.set(keyring.getProperty(ARGEO_SECRET_KEY_FACTORY)
 123                                         .getString(), JcrUtils.getBinaryAsBytes(keyring
 124                                         .getProperty(ARGEO_SALT)),
 125                                         (int) keyring.getProperty(ARGEO_ITERATION_COUNT).getLong(),
 126                                         (int) keyring.getProperty(ARGEO_KEY_LENGTH).getLong(),
 127                                         keyring.getProperty(ARGEO_SECRET_KEY_ENCRYPTION)
 128                                                         .getString());
 129
 130                         if (notYetSavedKeyring.get() != null)
 131                                 notYetSavedKeyring.remove();
 132                 } catch (RepositoryException e) {
 133                         throw new ArgeoException("Cannot handle key spec callback", e);
 134                 }
 135         }
 136
 137         /** The node must already exist at this path */
 138         @Override
 139         protected void encrypt(String path, InputStream unencrypted) {
 140                 // should be called first for lazy initialization
 141                 SecretKey secretKey = getSecretKey();
 142
 143                 Binary binary = null;
 144                 InputStream in = null;
 145                 // ByteArrayOutputStream out = null;
 146                 // OutputStream encrypted = null;
 147
 148                 try {
 149                         Cipher cipher = createCipher();
 150                         if (!session.nodeExists(path))
 151                                 throw new ArgeoException("No node at " + path);
 152                         Node node = session.getNode(path);
 153                         node.addMixin(ArgeoTypes.ARGEO_ENCRYPTED);
 154                         SecureRandom random = new SecureRandom();
 155                         byte[] iv = new byte[16];
 156                         random.nextBytes(iv);
 157                         cipher.init(Cipher.ENCRYPT_MODE, secretKey, new IvParameterSpec(iv));
 158                         // AlgorithmParameters params = cipher.getParameters();
 159                         // byte[] iv =
 160                         // params.getParameterSpec(IvParameterSpec.class).getIV();
 161                         // if (iv != null)
 162                         JcrUtils.setBinaryAsBytes(node, ARGEO_IV, iv);
 163
 164                         // out = new ByteArrayOutputStream();
 165                         // // encrypted = new CipherOutputStream(out, cipher);
 166                         // IOUtils.copy(unencrypted, out);
 167                         // byte[] unenc = out.toByteArray();
 168                         // byte[] crypted = cipher.doFinal(unenc);
 169
 170                         // Cipher decipher = createCipher();
 171                         // decipher.init(Cipher.DECRYPT_MODE, secretKey, new
 172                         // IvParameterSpec(
 173                         // iv));
 174                         // byte[] decrypted = decipher.doFinal(crypted);
 175                         // System.out.println("Password :'" + new String(decrypted) + "'");
 176
 177                         // JcrUtils.setBinaryAsBytes(node, Property.JCR_DATA, crypted);
 178
 179                         in = new CipherInputStream(unencrypted, cipher);
 180                         binary = session.getValueFactory().createBinary(in);
 181                         node.setProperty(Property.JCR_DATA, binary);
 182                 } catch (Exception e) {
 183                         throw new ArgeoException("Cannot encrypt", e);
 184                 } finally {
 185                         // IOUtils.closeQuietly(out);
 186                         // IOUtils.closeQuietly(encrypted);
 187                         IOUtils.closeQuietly(unencrypted);
 188                         IOUtils.closeQuietly(in);
 189                         JcrUtils.closeQuietly(binary);
 190                 }
 191         }
 192
 193         @Override
 194         protected InputStream decrypt(String path) {
 195                 // should be called first for lazy initialization
 196                 SecretKey secretKey = getSecretKey();
 197
 198                 Binary binary = null;
 199                 InputStream encrypted = null;
 200
 201                 try {
 202                         Cipher cipher = createCipher();
 203                         if (!session.nodeExists(path))
 204                                 throw new ArgeoException("No node at " + path);
 205                         Node node = session.getNode(path);
 206                         if (node.hasProperty(ARGEO_IV)) {
 207                                 byte[] iv = JcrUtils.getBinaryAsBytes(node
 208                                                 .getProperty(ARGEO_IV));
 209                                 cipher.init(Cipher.DECRYPT_MODE, secretKey,
 210                                                 new IvParameterSpec(iv));
 211                         } else {
 212                                 cipher.init(Cipher.DECRYPT_MODE, secretKey);
 213                         }
 214
 215                         // byte[] arr = JcrUtils.getBinaryAsBytes(node
 216                         // .getProperty(Property.JCR_DATA));
 217                         // byte[] arr2 = cipher.doFinal(arr);
 218                         //
 219                         // return new ByteArrayInputStream(arr2);
 220
 221                         binary = node.getProperty(Property.JCR_DATA).getBinary();
 222                         encrypted = binary.getStream();
 223                         return new CipherInputStream(encrypted, cipher);
 224                 } catch (Exception e) {
 225                         throw new ArgeoException("Cannot decrypt", e);
 226                 } finally {
 227                         IOUtils.closeQuietly(encrypted);
 228                         JcrUtils.closeQuietly(binary);
 229                 }
 230         }
 231
 232         protected Cipher createCipher() {
 233                 try {
 234                         Node userHome = JcrUtils.getUserHome(session);
 235                         if (!userHome.hasNode(ARGEO_KEYRING))
 236                                 throw new ArgeoException("Keyring not setup");
 237                         Node keyring = userHome.getNode(ARGEO_KEYRING);
 238                         Cipher cipher = Cipher.getInstance(keyring
 239                                         .getProperty(ARGEO_CIPHER).getString());
 240                         return cipher;
 241                 } catch (Exception e) {
 242                         throw new ArgeoException("Cannot get cipher", e);
 243                 }
 244         }
 245
 246         public void changePassword(char[] oldPassword, char[] newPassword) {
 247                 // TODO Auto-generated method stub
 248
 249         }
 250
 251         public Session getSession() {
 252                 return session;
 253         }
 254
 255         public void setSession(Session session) {
 256                 this.session = session;
 257         }
 258
 259 }