ggershinsky commented on a change in pull request #615: URL: https://github.com/apache/parquet-mr/pull/615#discussion_r439800189
########## File path: parquet-hadoop/src/main/java/org/apache/parquet/crypto/keytools/FileKeyWrapper.java ########## @@ -0,0 +1,227 @@ +/* + * 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.parquet.crypto.keytools; + +import java.io.IOException; +import java.nio.charset.StandardCharsets; +import java.security.SecureRandom; +import java.util.Base64; +import java.util.HashMap; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ConcurrentMap; + +import org.apache.hadoop.conf.Configuration; +import org.apache.parquet.crypto.ParquetCryptoRuntimeException; +import org.apache.parquet.crypto.keytools.KeyToolkit.KeyEncryptionKey; +import org.codehaus.jackson.map.ObjectMapper; + +public class FileKeyWrapper { + + public static final int KEK_LENGTH = 16; + public static final int KEK_ID_LENGTH = 16; + + // For every token: a map of MEK_ID to (KEK ID and KEK) + private static final ConcurrentMap<String, ExpiringCacheEntry<ConcurrentMap<String, KeyEncryptionKey>>> KEKMapPerToken = + new ConcurrentHashMap<>(KeyToolkit.INITIAL_PER_TOKEN_CACHE_SIZE); + private static volatile long lastKekCacheCleanupTimestamp = System.currentTimeMillis() + 60l * 1000; // grace period of 1 minute; + + //A map of MEK_ID to (KEK ID and KEK) - for the current token + private final ConcurrentMap<String, KeyEncryptionKey> KEKPerMasterKeyID; + + private static final ObjectMapper objectMapper = new ObjectMapper(); + + private final long cacheEntryLifetime; + + private final KmsClient kmsClient; + private final String kmsInstanceID; + private final String kmsInstanceURL; + private final FileKeyMaterialStore keyMaterialStore; + private final Configuration hadoopConfiguration; + private final SecureRandom random; + private final boolean doubleWrapping; + + private short keyCounter; + private String accessToken; + + public FileKeyWrapper(Configuration configuration, FileKeyMaterialStore keyMaterialStore) { + this.hadoopConfiguration = configuration; + + cacheEntryLifetime = 1000l * hadoopConfiguration.getLong(KeyToolkit.TOKEN_LIFETIME_PROPERTY_NAME, + KeyToolkit.DEFAULT_CACHE_ENTRY_LIFETIME); + + kmsInstanceID = hadoopConfiguration.getTrimmed(KeyToolkit.KMS_INSTANCE_ID_PROPERTY_NAME, + KmsClient.DEFAULT_KMS_INSTANCE_ID); + + doubleWrapping = hadoopConfiguration.getBoolean(KeyToolkit.DOUBLE_WRAPPING_PROPERTY_NAME, true); + accessToken = hadoopConfiguration.getTrimmed(KeyToolkit.KEY_ACCESS_TOKEN_PROPERTY_NAME, KmsClient.DEFAULT_ACCESS_TOKEN); + + kmsClient = KeyToolkit.getKmsClient(kmsInstanceID, configuration, accessToken, cacheEntryLifetime); + + kmsInstanceURL = hadoopConfiguration.getTrimmed(KeyToolkit.KMS_INSTANCE_URL_PROPERTY_NAME, + RemoteKmsClient.DEFAULT_KMS_INSTANCE_URL); + + this.keyMaterialStore = keyMaterialStore; + + random = new SecureRandom(); + keyCounter = 0; + + // Check caches upon each file writing (clean once in cacheEntryLifetime) + KeyToolkit.checkKmsCacheForExpiredTokens(cacheEntryLifetime); + if (doubleWrapping) { + checkKekCacheForExpiredTokens(); + + ExpiringCacheEntry<ConcurrentMap<String, KeyEncryptionKey>> KEKCacheEntry = KEKMapPerToken.get(accessToken); + if ((null == KEKCacheEntry) || KEKCacheEntry.isExpired()) { + synchronized (KEKMapPerToken) { + KEKCacheEntry = KEKMapPerToken.get(accessToken); + if ((null == KEKCacheEntry) || KEKCacheEntry.isExpired()) { + KEKCacheEntry = new ExpiringCacheEntry<>(new ConcurrentHashMap<String, KeyEncryptionKey>(), cacheEntryLifetime); + KEKMapPerToken.put(accessToken, KEKCacheEntry); + } + } + } + KEKPerMasterKeyID = KEKCacheEntry.getCachedItem(); + } else { + KEKPerMasterKeyID = null; + } + } + + public byte[] getEncryptionKeyMetadata(byte[] dataKey, String masterKeyID, boolean isFooterKey) { + return getEncryptionKeyMetadata(dataKey, masterKeyID, isFooterKey, null); + } + + static void removeCacheEntriesForToken(String accessToken) { + synchronized(KEKMapPerToken) { Review comment: if the previous suggestion works, this is indeed not needed ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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