stash context before accessing ml config index; increase master key size to 32 (#1092) (#1093)

opensearch-trigger-bot[bot] · ylwu-amzn · web-flow · commit a966bf186ab4 · 2023-07-12T02:28:55.000-07:00
Signed-off-by: Yaliang Wu <ylwu@amazon.com> (cherry picked from commit d9d1190) Co-authored-by: Yaliang Wu <ylwu@amazon.com>
diff --git a/ml-algorithms/src/main/java/org/opensearch/ml/engine/encryptor/EncryptorImpl.java b/ml-algorithms/src/main/java/org/opensearch/ml/engine/encryptor/EncryptorImpl.java
@@ -17,6 +17,7 @@
 import org.opensearch.action.get.GetResponse;
 import org.opensearch.client.Client;
 import org.opensearch.cluster.service.ClusterService;
+import org.opensearch.common.util.concurrent.ThreadContext;
 import org.opensearch.ml.common.exception.MLException;
 
 import javax.crypto.spec.SecretKeySpec;
@@ -62,9 +63,9 @@ public String encrypt(String plainText) {
         final AwsCrypto crypto = AwsCrypto.builder()
                 .withCommitmentPolicy(CommitmentPolicy.RequireEncryptRequireDecrypt)
                 .build();
-
+        byte[] bytes = Base64.getDecoder().decode(masterKey);
         JceMasterKey jceMasterKey
-                = JceMasterKey.getInstance(new SecretKeySpec(masterKey.getBytes(), "AES"), "Custom", "",
+                = JceMasterKey.getInstance(new SecretKeySpec(bytes, "AES"), "Custom", "",
                 "AES/GCM/NoPadding");
 
         final CryptoResult<byte[], JceMasterKey> encryptResult = crypto.encryptData(jceMasterKey,
@@ -79,8 +80,9 @@ public String decrypt(String encryptedText) {
                 .withCommitmentPolicy(CommitmentPolicy.RequireEncryptRequireDecrypt)
                 .build();
 
+        byte[] bytes = Base64.getDecoder().decode(masterKey);
         JceMasterKey jceMasterKey
-                = JceMasterKey.getInstance(new SecretKeySpec(masterKey.getBytes(), "AES"), "Custom", "",
+                = JceMasterKey.getInstance(new SecretKeySpec(bytes, "AES"), "Custom", "",
                 "AES/GCM/NoPadding");
 
         final CryptoResult<byte[], JceMasterKey> decryptedResult
@@ -90,7 +92,7 @@ public String decrypt(String encryptedText) {
 
     @Override
     public String generateMasterKey() {
-        byte[] keyBytes = new byte[16];
+        byte[] keyBytes = new byte[32];
         new SecureRandom().nextBytes(keyBytes);
         String base64Key = Base64.getEncoder().encodeToString(keyBytes);
         return base64Key;
@@ -104,18 +106,20 @@ private void initMasterKey() {
 
         CountDownLatch latch = new CountDownLatch(1);
         if (clusterService.state().metadata().hasIndex(ML_CONFIG_INDEX)) {
-            GetRequest getRequest = new GetRequest(ML_CONFIG_INDEX).id(MASTER_KEY);
-            client.get(getRequest, new LatchedActionListener(ActionListener.<GetResponse>wrap(r -> {
-                if (r.isExists()) {
-                    String masterKey = (String) r.getSourceAsMap().get(MASTER_KEY);
-                    setMasterKey(masterKey);
-                } else {
-                    exceptionRef.set(new ResourceNotFoundException("ML encryption master key not initialized yet"));
-                }
-            }, e -> {
-                log.error("Failed to get ML encryption master key", e);
-                exceptionRef.set(e);
-            }), latch));
+            try (ThreadContext.StoredContext context = client.threadPool().getThreadContext().stashContext()) {
+                GetRequest getRequest = new GetRequest(ML_CONFIG_INDEX).id(MASTER_KEY);
+                client.get(getRequest, new LatchedActionListener(ActionListener.<GetResponse>wrap(r -> {
+                    if (r.isExists()) {
+                        String masterKey = (String) r.getSourceAsMap().get(MASTER_KEY);
+                        setMasterKey(masterKey);
+                    } else {
+                        exceptionRef.set(new ResourceNotFoundException("ML encryption master key not initialized yet"));
+                    }
+                }, e -> {
+                    log.error("Failed to get ML encryption master key", e);
+                    exceptionRef.set(e);
+                }), latch));
+            }
         } else {
             exceptionRef.set(new ResourceNotFoundException("ML encryption master key not initialized yet"));
         }
diff --git a/ml-algorithms/src/test/java/org/opensearch/ml/engine/MLEngineTest.java b/ml-algorithms/src/test/java/org/opensearch/ml/engine/MLEngineTest.java
@@ -53,7 +53,7 @@ public class MLEngineTest {
 
     @Before
     public void setUp() {
-        Encryptor encryptor = new EncryptorImpl("0000000000000000");
+        Encryptor encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(Path.of("/tmp/test" + UUID.randomUUID()), encryptor);
     }
 
diff --git a/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/metrics_correlation/MetricsCorrelationTest.java b/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/metrics_correlation/MetricsCorrelationTest.java
@@ -157,7 +157,7 @@ public void setUp() throws IOException, URISyntaxException {
         System.setProperty("testMode", "true");
 
         mlCachePath = Path.of("/tmp/djl_cache_" + UUID.randomUUID());
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(mlCachePath, encryptor);
         modelConfig = MetricsCorrelationModelConfig.builder()
                 .modelType(MetricsCorrelation.MODEL_TYPE)
diff --git a/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/remote/AwsConnectorExecutorTest.java b/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/remote/AwsConnectorExecutorTest.java
@@ -67,7 +67,7 @@ public class AwsConnectorExecutorTest {
     @Before
     public void setUp() {
         MockitoAnnotations.openMocks(this);
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
     }
 
     @Test
diff --git a/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/remote/RemoteModelTest.java b/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/remote/RemoteModelTest.java
@@ -48,7 +48,7 @@ public class RemoteModelTest {
     public void setUp() {
         MockitoAnnotations.openMocks(this);
         remoteModel = new RemoteModel();
-        encryptor = spy(new EncryptorImpl("0000000000000001"));
+        encryptor = spy(new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w="));
     }
 
     @Test
diff --git a/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/text_embedding/ModelHelperTest.java b/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/text_embedding/ModelHelperTest.java
@@ -59,7 +59,7 @@ public void setup() throws URISyntaxException {
         MockitoAnnotations.openMocks(this);
         modelFormat = MLModelFormat.TORCH_SCRIPT;
         modelId = "model_id";
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(Path.of("/tmp/test" + modelId), encryptor);
         modelHelper = new ModelHelper(mlEngine);
     }
diff --git a/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/text_embedding/TextEmbeddingModelTest.java b/ml-algorithms/src/test/java/org/opensearch/ml/engine/algorithms/text_embedding/TextEmbeddingModelTest.java
@@ -73,7 +73,7 @@ public class TextEmbeddingModelTest {
     @Before
     public void setUp() throws URISyntaxException {
         mlCachePath = Path.of("/tmp/ml_cache" + UUID.randomUUID());
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(mlCachePath, encryptor);
         modelId = "test_model_id";
         modelName = "test_model_name";
diff --git a/ml-algorithms/src/test/java/org/opensearch/ml/engine/encryptor/EncryptorImplTest.java b/ml-algorithms/src/test/java/org/opensearch/ml/engine/encryptor/EncryptorImplTest.java
@@ -18,6 +18,9 @@
 import org.opensearch.cluster.metadata.Metadata;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.settings.Settings;
+import org.opensearch.common.util.concurrent.ThreadContext;
+import org.opensearch.commons.ConfigConstants;
+import org.opensearch.threadpool.ThreadPool;
 
 import java.time.Instant;
 
@@ -43,10 +46,15 @@ public class EncryptorImplTest {
 
     String masterKey;
 
+    @Mock
+    ThreadPool threadPool;
+    ThreadContext threadContext;
+    final String USER_STRING = "myuser|role1,role2|myTenant";
+
     @Before
     public void setUp() {
         MockitoAnnotations.openMocks(this);
-        masterKey = "0000000000000001";
+        masterKey = "m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=";
 
         doAnswer(invocation -> {
             ActionListener<GetResponse> listener = invocation.getArgument(1);
@@ -72,6 +80,12 @@ public void setUp() {
                                 .build())
                         .build()).build();
         when(clusterState.metadata()).thenReturn(metadata);
+
+        Settings settings = Settings.builder().build();
+        threadContext = new ThreadContext(settings);
+        threadContext.putTransient(ConfigConstants.OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT, USER_STRING);
+        when(client.threadPool()).thenReturn(threadPool);
+        when(threadPool.getThreadContext()).thenReturn(threadContext);
     }
 
     @Test
@@ -83,6 +97,17 @@ public void encrypt() {
         Assert.assertEquals(masterKey, encryptor.getMasterKey());
     }
 
+    @Test
+    public void encrypt_DifferentMasterKey() {
+        Encryptor encryptor = new EncryptorImpl(masterKey);
+        Assert.assertNotNull(encryptor.getMasterKey());
+        String encrypted1 = encryptor.encrypt("test");
+
+        encryptor.setMasterKey(encryptor.generateMasterKey());
+        String encrypted2 = encryptor.encrypt("test");
+        Assert.assertNotEquals(encrypted1, encrypted2);
+    }
+
     @Test
     public void decrypt() {
         Encryptor encryptor = new EncryptorImpl(clusterService, client);
diff --git a/plugin/src/main/java/org/opensearch/ml/cluster/MLSyncUpCron.java b/plugin/src/main/java/org/opensearch/ml/cluster/MLSyncUpCron.java
@@ -31,6 +31,7 @@
 import org.opensearch.client.Client;
 import org.opensearch.cluster.node.DiscoveryNode;
 import org.opensearch.cluster.service.ClusterService;
+import org.opensearch.common.util.concurrent.ThreadContext;
 import org.opensearch.index.query.BoolQueryBuilder;
 import org.opensearch.index.query.TermsQueryBuilder;
 import org.opensearch.ml.common.MLModel;
@@ -168,24 +169,26 @@ void initMLConfig() {
         }
         mlIndicesHandler.initMLConfigIndex(ActionListener.wrap(r -> {
             GetRequest getRequest = new GetRequest(ML_CONFIG_INDEX).id(MASTER_KEY);
-            client.get(getRequest, ActionListener.wrap(getResponse -> {
-                if (!getResponse.isExists()) {
-                    IndexRequest indexRequest = new IndexRequest(ML_CONFIG_INDEX).id(MASTER_KEY);
-                    final String masterKey = encryptor.generateMasterKey();
-                    indexRequest.source(ImmutableMap.of(MASTER_KEY, masterKey, CREATE_TIME_FIELD, Instant.now().toEpochMilli()));
-                    indexRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
-                    client.index(indexRequest, ActionListener.wrap(indexResponse -> {
-                        log.info("ML configuration initialized successfully");
+            try (ThreadContext.StoredContext context = client.threadPool().getThreadContext().stashContext()) {
+                client.get(getRequest, ActionListener.wrap(getResponse -> {
+                    if (!getResponse.isExists()) {
+                        IndexRequest indexRequest = new IndexRequest(ML_CONFIG_INDEX).id(MASTER_KEY);
+                        final String masterKey = encryptor.generateMasterKey();
+                        indexRequest.source(ImmutableMap.of(MASTER_KEY, masterKey, CREATE_TIME_FIELD, Instant.now().toEpochMilli()));
+                        indexRequest.setRefreshPolicy(WriteRequest.RefreshPolicy.IMMEDIATE);
+                        client.index(indexRequest, ActionListener.wrap(indexResponse -> {
+                            log.info("ML configuration initialized successfully");
+                            encryptor.setMasterKey(masterKey);
+                            mlConfigInited = true;
+                        }, e -> { log.debug("Failed to save ML encryption master key", e); }));
+                    } else {
+                        final String masterKey = (String) getResponse.getSourceAsMap().get(MASTER_KEY);
                         encryptor.setMasterKey(masterKey);
                         mlConfigInited = true;
-                    }, e -> { log.debug("Failed to save ML encryption master key", e); }));
-                } else {
-                    final String masterKey = (String) getResponse.getSourceAsMap().get(MASTER_KEY);
-                    encryptor.setMasterKey(masterKey);
-                    mlConfigInited = true;
-                    log.info("ML configuration already initialized, no action needed");
-                }
-            }, e -> { log.debug("Failed to get ML encryption master key", e); }));
+                        log.info("ML configuration already initialized, no action needed");
+                    }
+                }, e -> { log.debug("Failed to get ML encryption master key", e); }));
+            }
         }, e -> { log.debug("Failed to init ML config index", e); }));
     }
 
diff --git a/plugin/src/test/java/org/opensearch/ml/action/deploy/TransportDeployModelActionTests.java b/plugin/src/test/java/org/opensearch/ml/action/deploy/TransportDeployModelActionTests.java
@@ -142,7 +142,7 @@ public void setup() {
         clusterSettings = new ClusterSettings(settings, new HashSet<>(Arrays.asList(ML_COMMONS_ALLOW_CUSTOM_DEPLOYMENT_PLAN)));
         when(clusterService.getClusterSettings()).thenReturn(clusterSettings);
 
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(Path.of("/tmp/test" + randomAlphaOfLength(10)), encryptor);
         modelHelper = new ModelHelper(mlEngine);
         when(mlDeployModelRequest.getModelId()).thenReturn("mockModelId");
diff --git a/plugin/src/test/java/org/opensearch/ml/cluster/MLSyncUpCronTests.java b/plugin/src/test/java/org/opensearch/ml/cluster/MLSyncUpCronTests.java
@@ -57,7 +57,10 @@
 import org.opensearch.cluster.node.DiscoveryNodes;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.bytes.BytesReference;
+import org.opensearch.common.settings.Settings;
 import org.opensearch.common.transport.TransportAddress;
+import org.opensearch.common.util.concurrent.ThreadContext;
+import org.opensearch.commons.ConfigConstants;
 import org.opensearch.core.xcontent.XContentBuilder;
 import org.opensearch.ml.common.MLModel;
 import org.opensearch.ml.common.model.MLModelState;
@@ -75,12 +78,12 @@
 import org.opensearch.search.profile.SearchProfileShardResults;
 import org.opensearch.search.suggest.Suggest;
 import org.opensearch.test.OpenSearchTestCase;
+import org.opensearch.threadpool.ThreadPool;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.ImmutableSet;
 
 public class MLSyncUpCronTests extends OpenSearchTestCase {
-
     @Mock
     private Client client;
     @Mock
@@ -100,6 +103,11 @@ public class MLSyncUpCronTests extends OpenSearchTestCase {
     private ClusterState testState;
     private Encryptor encryptor;
 
+    @Mock
+    ThreadPool threadPool;
+    ThreadContext threadContext;
+    final String USER_STRING = "myuser|role1,role2|myTenant";
+
     @Before
     public void setup() throws IOException {
         MockitoAnnotations.openMocks(this);
@@ -116,6 +124,12 @@ public void setup() throws IOException {
             actionListener.onResponse(true);
             return null;
         }).when(mlIndicesHandler).initMLConfigIndex(any());
+
+        Settings settings = Settings.builder().build();
+        threadContext = new ThreadContext(settings);
+        threadContext.putTransient(ConfigConstants.OPENSEARCH_SECURITY_USER_INFO_THREAD_CONTEXT, USER_STRING);
+        when(client.threadPool()).thenReturn(threadPool);
+        when(threadPool.getThreadContext()).thenReturn(threadContext);
     }
 
     public void testInitMlConfig_MasterKeyNotExist() {
diff --git a/plugin/src/test/java/org/opensearch/ml/model/MLModelManagerTests.java b/plugin/src/test/java/org/opensearch/ml/model/MLModelManagerTests.java
@@ -170,7 +170,7 @@ public class MLModelManagerTests extends OpenSearchTestCase {
 
     @Before
     public void setup() throws URISyntaxException {
-        String masterKey = "0000000000000001";
+        String masterKey = "m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=";
         MockitoAnnotations.openMocks(this);
         encryptor = new EncryptorImpl(masterKey);
         mlEngine = new MLEngine(Path.of("/tmp/test" + randomAlphaOfLength(10)), encryptor);
diff --git a/plugin/src/test/java/org/opensearch/ml/task/MLExecuteTaskRunnerTests.java b/plugin/src/test/java/org/opensearch/ml/task/MLExecuteTaskRunnerTests.java
@@ -93,7 +93,7 @@ public class MLExecuteTaskRunnerTests extends OpenSearchTestCase {
     @Before
     public void setup() {
         MockitoAnnotations.openMocks(this);
-        encryptor = new EncryptorImpl("0000000000000000");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(Path.of("/tmp/djl-cache/" + randomAlphaOfLength(10)), encryptor);
         when(threadPool.executor(anyString())).thenReturn(executorService);
         doAnswer(invocation -> {
diff --git a/plugin/src/test/java/org/opensearch/ml/task/MLPredictTaskRunnerTests.java b/plugin/src/test/java/org/opensearch/ml/task/MLPredictTaskRunnerTests.java
@@ -127,7 +127,7 @@ public class MLPredictTaskRunnerTests extends OpenSearchTestCase {
     @Before
     public void setup() throws IOException {
         MockitoAnnotations.openMocks(this);
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(Path.of("/tmp/test" + randomAlphaOfLength(10)), encryptor);
         localNode = new DiscoveryNode("localNodeId", buildNewFakeTransportAddress(), Version.CURRENT);
         remoteNode = new DiscoveryNode("remoteNodeId", buildNewFakeTransportAddress(), Version.CURRENT);
diff --git a/plugin/src/test/java/org/opensearch/ml/task/MLTrainAndPredictTaskRunnerTests.java b/plugin/src/test/java/org/opensearch/ml/task/MLTrainAndPredictTaskRunnerTests.java
@@ -101,7 +101,7 @@ public class MLTrainAndPredictTaskRunnerTests extends OpenSearchTestCase {
 
     @Before
     public void setup() {
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(Path.of("/tmp/test" + randomAlphaOfLength(10)), encryptor);
         settings = Settings.builder().build();
         MockitoAnnotations.openMocks(this);
diff --git a/plugin/src/test/java/org/opensearch/ml/task/MLTrainingTaskRunnerTests.java b/plugin/src/test/java/org/opensearch/ml/task/MLTrainingTaskRunnerTests.java
@@ -111,7 +111,7 @@ public class MLTrainingTaskRunnerTests extends OpenSearchTestCase {
     @Before
     public void setup() {
         MockitoAnnotations.openMocks(this);
-        encryptor = new EncryptorImpl("0000000000000001");
+        encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");
         mlEngine = new MLEngine(Path.of("/tmp/djl-cache_" + randomAlphaOfLength(10)), encryptor);
         localNode = new DiscoveryNode("localNodeId", buildNewFakeTransportAddress(), Version.CURRENT);
         remoteNode = new DiscoveryNode("remoteNodeId", buildNewFakeTransportAddress(), Version.CURRENT);

Original file line number	Diff line number	Diff line change
`@@ -53,7 +53,7 @@ public class MLEngineTest {`
`53`	`53`
`54`	`54`	`@Before`
`55`	`55`	`public void setUp() {`
`56`		`- Encryptor encryptor = new EncryptorImpl("0000000000000000");`
	`56`	`+ Encryptor encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");`
`57`	`57`	`mlEngine = new MLEngine(Path.of("/tmp/test" + UUID.randomUUID()), encryptor);`
`58`	`58`	`}`
`59`	`59`
Original file line number	Diff line number	Diff line change
`@@ -67,7 +67,7 @@ public class AwsConnectorExecutorTest {`
`67`	`67`	`@Before`
`68`	`68`	`public void setUp() {`
`69`	`69`	`MockitoAnnotations.openMocks(this);`
`70`		`- encryptor = new EncryptorImpl("0000000000000001");`
	`70`	`+ encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");`
`71`	`71`	`}`
`72`	`72`
`73`	`73`	`@Test`
Original file line number	Diff line number	Diff line change
`@@ -48,7 +48,7 @@ public class RemoteModelTest {`
`48`	`48`	`public void setUp() {`
`49`	`49`	`MockitoAnnotations.openMocks(this);`
`50`	`50`	`remoteModel = new RemoteModel();`
`51`		`- encryptor = spy(new EncryptorImpl("0000000000000001"));`
	`51`	`+ encryptor = spy(new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w="));`
`52`	`52`	`}`
`53`	`53`
`54`	`54`	`@Test`
Original file line number	Diff line number	Diff line change
`@@ -59,7 +59,7 @@ public void setup() throws URISyntaxException {`
`59`	`59`	`MockitoAnnotations.openMocks(this);`
`60`	`60`	`modelFormat = MLModelFormat.TORCH_SCRIPT;`
`61`	`61`	`modelId = "model_id";`
`62`		`- encryptor = new EncryptorImpl("0000000000000001");`
	`62`	`+ encryptor = new EncryptorImpl("m+dWmfmnNRiNlOdej/QelEkvMTyH//frS2TBeS2BP4w=");`
`63`	`63`	`mlEngine = new MLEngine(Path.of("/tmp/test" + modelId), encryptor);`
`64`	`64`	`modelHelper = new ModelHelper(mlEngine);`
`65`	`65`	`}`