[GitHub] [ignite] NSAmelchev commented on a change in pull request #7941: IGNITE-12843

[GitBox <gi...@apache.org>]

NSAmelchev commented on a change in pull request #7941:
URL: https://github.com/apache/ignite/pull/7941#discussion_r505408315



##########
File path: modules/core/src/main/java/org/apache/ignite/internal/managers/encryption/GroupKeyChangeProcess.java
##########
@@ -0,0 +1,352 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.managers.encryption;
+
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.internal.GridKernalContext;
+import org.apache.ignite.internal.IgniteFeatures;
+import org.apache.ignite.internal.IgniteInternalFuture;
+import org.apache.ignite.internal.managers.encryption.GridEncryptionManager.EmptyResult;
+import org.apache.ignite.internal.managers.encryption.GridEncryptionManager.KeyChangeFuture;
+import org.apache.ignite.internal.processors.cache.CacheGroupDescriptor;
+import org.apache.ignite.internal.processors.cache.DynamicCacheDescriptor;
+import org.apache.ignite.internal.util.distributed.DistributedProcess;
+import org.apache.ignite.internal.util.future.GridFinishedFuture;
+import org.apache.ignite.internal.util.future.GridFutureAdapter;
+import org.apache.ignite.internal.util.future.IgniteFinishedFutureImpl;
+import org.apache.ignite.internal.util.future.IgniteFutureImpl;
+import org.apache.ignite.internal.util.typedef.F;
+import org.apache.ignite.internal.util.typedef.internal.CU;
+import org.apache.ignite.internal.util.typedef.internal.S;
+import org.apache.ignite.internal.util.typedef.internal.U;
+import org.apache.ignite.lang.IgniteFuture;
+import org.apache.ignite.lang.IgniteFutureCancelledException;
+
+import static org.apache.ignite.internal.IgniteFeatures.CACHE_GROUP_KEY_CHANGE;
+import static org.apache.ignite.internal.util.distributed.DistributedProcess.DistributedProcessType.CACHE_GROUP_KEY_CHANGE_FINISH;
+import static org.apache.ignite.internal.util.distributed.DistributedProcess.DistributedProcessType.CACHE_GROUP_KEY_CHANGE_PREPARE;
+
+/**
+ * A two-phase distributed process that rotates the encryption keys of specified cache groups and initiates
+ * re-encryption of those cache groups.
+ */
+class GroupKeyChangeProcess {
+    /** Grid kernal context. */
+    private final GridKernalContext ctx;
+
+    /** Cache group encyption key change prepare phase. */
+    private final DistributedProcess<ChangeCacheEncryptionRequest, EmptyResult> prepareGKChangeProc;
+
+    /** Cache group encyption key change perform phase. */
+    private final DistributedProcess<ChangeCacheEncryptionRequest, EmptyResult> performGKChangeProc;
+
+    /** Group encryption keys. */
+    private final CacheGroupEncryptionKeys keys;
+
+    /** Cache group key change future. */
+    private volatile GroupKeyChangeFuture fut;
+
+    /** Cache group key change request. */
+    private volatile ChangeCacheEncryptionRequest req;
+
+    /**
+     * @param ctx Grid kernal context.
+     * @param keys Cache group encryption keys.
+     */
+    GroupKeyChangeProcess(GridKernalContext ctx, CacheGroupEncryptionKeys keys) {
+        this.ctx = ctx;
+        this.keys = keys;
+
+        prepareGKChangeProc =
+            new DistributedProcess<>(ctx, CACHE_GROUP_KEY_CHANGE_PREPARE, this::prepare, this::finishPrepare);
+        performGKChangeProc =
+            new DistributedProcess<>(ctx, CACHE_GROUP_KEY_CHANGE_FINISH, this::perform, this::finishPerform);
+    }
+
+    /**
+     * @return {@code True} if operation is still in progress.
+     */
+    public boolean inProgress() {
+        return req != null;
+    }
+
+    /**
+     * @param msg Error message.
+     */
+    public void cancel(String msg) {
+        GridFutureAdapter<Void> keyChangeFut = fut;
+
+        if (keyChangeFut != null && !keyChangeFut.isDone())
+            keyChangeFut.onDone(new IgniteFutureCancelledException(msg));
+    }
+
+    /**
+     * Starts cache group encryption key change process.
+     *
+     * @param cacheOrGrpNames Cache or group names.
+     */
+    public IgniteFuture<Void> start(Collection<String> cacheOrGrpNames) {
+        if (ctx.clientNode())
+            throw new UnsupportedOperationException("Client and daemon nodes can not perform this operation.");
+
+        if (!IgniteFeatures.allNodesSupports(ctx.grid().cluster().nodes(), CACHE_GROUP_KEY_CHANGE))
+            throw new IllegalStateException("Not all nodes in the cluster support this operation.");
+
+        if (!ctx.state().clusterState().state().active())
+            throw new IgniteException("Operation was rejected. The cluster is inactive.");
+
+        IgniteInternalFuture<Void> fut0 = fut;
+
+        if (fut0 != null && !fut0.isDone()) {
+            return new IgniteFinishedFutureImpl<>(new IgniteException("Cache group key change was rejected. " +
+                "The previous change was not completed."));
+        }
+
+        int[] grpIds = new int[cacheOrGrpNames.size()];
+        byte[] keyIds = new byte[grpIds.length];
+
+        int n = 0;
+
+        for (String cacheOrGroupName : cacheOrGrpNames) {
+            CacheGroupDescriptor grpDesc = ctx.cache().cacheGroupDescriptor(CU.cacheId(cacheOrGroupName));
+
+            if (grpDesc == null) {
+                DynamicCacheDescriptor cacheDesc = ctx.cache().cacheDescriptor(cacheOrGroupName);
+
+                if (cacheDesc == null) {
+                    throw new IgniteException("Cache group key change was rejected. " +
+                        "Cache or group \"" + cacheOrGroupName + "\" doesn't exists");
+                }
+
+                int grpId = cacheDesc.groupId();
+
+                grpDesc = ctx.cache().cacheGroupDescriptor(grpId);
+
+                if (grpDesc.sharedGroup()) {
+                    throw new IgniteException("Cache group key change was rejected. " +
+                        "Cache or group \"" + cacheOrGroupName + "\" is a part of group \"" +
+                        grpDesc.groupName() + "\". Provide group name instead of cache name for shared groups.");
+                }
+            }
+
+            if (!grpDesc.config().isEncryptionEnabled()) {
+                throw new IgniteException("Cache group key change was rejected. " +
+                    "Cache or group \"" + cacheOrGroupName + "\" is not encrypted.");
+            }
+
+            if (ctx.encryption().reencryptionInProgress(grpDesc.groupId())) {
+                throw new IgniteException("Cache group key change was rejected. " +
+                    "Cache group reencryption is in progress [grp=" + cacheOrGroupName + "]");
+            }
+
+            grpIds[n] = grpDesc.groupId();
+            keyIds[n] = (byte)(ctx.encryption().groupKey(grpDesc.groupId()).unsignedId() + 1);
+
+            n += 1;
+        }
+
+        byte[][] keys = ctx.encryption().createKeys(grpIds.length).get1().toArray(new byte[grpIds.length][]);
+
+        ChangeCacheEncryptionRequest req =
+            new ChangeCacheEncryptionRequest(grpIds, keys, keyIds, ctx.config().getEncryptionSpi().getMasterKeyName());

Review comment:
       Lets send a MK digest instead of a name




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