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Posted to issues@iceberg.apache.org by GitBox <gi...@apache.org> on 2022/07/29 07:50:25 UTC
[GitHub] [iceberg] zhongyujiang commented on a diff in pull request #3471: Core: Envelope encryption
zhongyujiang commented on code in PR #3471:
URL: https://github.com/apache/iceberg/pull/3471#discussion_r932928445
##########
core/src/main/java/org/apache/iceberg/encryption/EnvelopeEncryptionManager.java:
##########
@@ -0,0 +1,152 @@
+/*
+ * 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.iceberg.encryption;
+
+import java.nio.ByteBuffer;
+import java.security.SecureRandom;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+
+/**
+ * Encryption manager which in conjunction with a KMS can encrypt {@link OutputFile} and decrypt
+ * {@link InputFile}. Envelope encryption uses a key wrapping strategy, where a Key Encryption Key (KEK) is used to
+ * wrap or unwrap a Data Encryption Key DEK which is used to encrypt the underlying files.
+ *
+ * When generating new DEKs for OutputFiles, this class will first attempt to have the KMS generate a new key. If the
+ * KMS does not support key generation a new key will be produced by pulling bytes from a {@link SecureRandom} on the
+ * JVM writing the file.
+ */
+public class EnvelopeEncryptionManager implements EncryptionManager {
+ private final EnvelopeConfiguration dataEncryptionConfig;
+ private final boolean nativeFormatEncryption;
+ private final KmsClient kmsClient;
+ private final int dataKeyLength;
+ private final boolean kmsGeneratedKeys;
+
+ private transient volatile SecureRandom workerRNG = null;
+
+ public static final String encryptionConfigMismatchMessagePrefix =
+ "Cannot create encryption manager - detected mismatch between client encryption properties and table " +
+ "encryption properties. Mismatch can be caused by changing encryption properties after table creation " +
+ "(currently not supported), or by malicious tampering with table properties kept in metadata.json in " +
+ "storage. Mismatch details: ";
+
+ /**
+ * @param nativeFormatEncryption true for native encryption inside file formats (Parquet or ORC), false for generic
+ * encryption of file streams
+ * @param dataEncryptionConfig configuration for encryption of data files. Future versions will add configuration for
+ * encryption of metadata files
+ * @param kmsClient Client of KMS used to wrap/unwrap keys in envelope encryption
+ * @param dataKeyLength If DEKs are not generated by KMS, they will be randomly generated by Iceberg using this length
+ */
+ public EnvelopeEncryptionManager(boolean nativeFormatEncryption, EnvelopeConfiguration dataEncryptionConfig,
+ KmsClient kmsClient, int dataKeyLength) {
+ if (!nativeFormatEncryption) {
+ throw new UnsupportedOperationException("EnvelopeEncryptionManager currently only supports encryption " +
+ "provided by the underlying file format.");
+ }
+ this.nativeFormatEncryption = nativeFormatEncryption;
+ Preconditions.checkNotNull(dataEncryptionConfig,
+ "Cannot create EnvelopeEncryptionManager because data encryption config is not passed");
+ this.dataEncryptionConfig = dataEncryptionConfig;
+ Preconditions.checkNotNull(dataEncryptionConfig.kekId(),
+ "Cannot create EnvelopeEncryptionManager because table key encryption key ID is not specified");
+ Preconditions.checkNotNull(kmsClient,
+ "Cannot create EnvelopeEncryptionManager because KmsClient is null");
+ this.kmsClient = kmsClient;
+ this.dataKeyLength = dataKeyLength;
+ this.kmsGeneratedKeys = kmsClient.supportsKeyGeneration();
+ }
+
+ @Override
+ public EncryptedOutputFile encrypt(OutputFile rawOutput) {
+ EnvelopeMetadata metadata = generateEnvelopeMetadata(dataEncryptionConfig);
+
+ if (nativeFormatEncryption) {
+ NativeFileCryptoParameters nativeEncryptParams = NativeFileCryptoParameters.create(metadata.dek())
+ .encryptionAlgorithm(metadata.algorithm())
+ .build();
+
+ if (!(rawOutput instanceof NativelyEncryptedFile)) {
+ throw new RuntimeException("Can't natively encrypt " + rawOutput.location() + " because the class " +
+ rawOutput.getClass() + " doesn't implement NativelyEncryptedFile interface");
+ }
+
+ ((NativelyEncryptedFile) rawOutput).setNativeCryptoParameters(nativeEncryptParams);
+
+ return new BaseEncryptedOutputFile(rawOutput, metadata);
+ } else {
+ throw new UnsupportedOperationException("EnvelopeEncryptionManager currently supports only file formats which " +
+ "have native encryption implementations");
+ }
+ }
+
+ @Override
+ public InputFile decrypt(EncryptedInputFile encrypted) {
+ if (encrypted.keyMetadata().buffer() == null) { // unencrypted file
+ return encrypted.encryptedInputFile();
+ }
+ EnvelopeMetadata metadata = EnvelopeMetadataParser.fromJson(encrypted.keyMetadata().buffer());
+ ByteBuffer fileDek = kmsClient.unwrapKey(metadata.wrappedDek(), metadata.kekId());
Review Comment:
I think `unwrap` should only be called when it is sure that decryption is needed to avoid unnecessary RPC calls.
##########
core/src/main/java/org/apache/iceberg/encryption/EnvelopeEncryptionManager.java:
##########
@@ -0,0 +1,152 @@
+/*
+ * 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.iceberg.encryption;
+
+import java.nio.ByteBuffer;
+import java.security.SecureRandom;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+
+/**
+ * Encryption manager which in conjunction with a KMS can encrypt {@link OutputFile} and decrypt
+ * {@link InputFile}. Envelope encryption uses a key wrapping strategy, where a Key Encryption Key (KEK) is used to
+ * wrap or unwrap a Data Encryption Key DEK which is used to encrypt the underlying files.
+ *
+ * When generating new DEKs for OutputFiles, this class will first attempt to have the KMS generate a new key. If the
+ * KMS does not support key generation a new key will be produced by pulling bytes from a {@link SecureRandom} on the
+ * JVM writing the file.
+ */
+public class EnvelopeEncryptionManager implements EncryptionManager {
+ private final EnvelopeConfiguration dataEncryptionConfig;
+ private final boolean nativeFormatEncryption;
+ private final KmsClient kmsClient;
+ private final int dataKeyLength;
+ private final boolean kmsGeneratedKeys;
+
+ private transient volatile SecureRandom workerRNG = null;
+
+ public static final String encryptionConfigMismatchMessagePrefix =
+ "Cannot create encryption manager - detected mismatch between client encryption properties and table " +
+ "encryption properties. Mismatch can be caused by changing encryption properties after table creation " +
+ "(currently not supported), or by malicious tampering with table properties kept in metadata.json in " +
+ "storage. Mismatch details: ";
+
+ /**
+ * @param nativeFormatEncryption true for native encryption inside file formats (Parquet or ORC), false for generic
+ * encryption of file streams
+ * @param dataEncryptionConfig configuration for encryption of data files. Future versions will add configuration for
+ * encryption of metadata files
+ * @param kmsClient Client of KMS used to wrap/unwrap keys in envelope encryption
+ * @param dataKeyLength If DEKs are not generated by KMS, they will be randomly generated by Iceberg using this length
+ */
+ public EnvelopeEncryptionManager(boolean nativeFormatEncryption, EnvelopeConfiguration dataEncryptionConfig,
+ KmsClient kmsClient, int dataKeyLength) {
+ if (!nativeFormatEncryption) {
+ throw new UnsupportedOperationException("EnvelopeEncryptionManager currently only supports encryption " +
+ "provided by the underlying file format.");
+ }
+ this.nativeFormatEncryption = nativeFormatEncryption;
+ Preconditions.checkNotNull(dataEncryptionConfig,
+ "Cannot create EnvelopeEncryptionManager because data encryption config is not passed");
+ this.dataEncryptionConfig = dataEncryptionConfig;
+ Preconditions.checkNotNull(dataEncryptionConfig.kekId(),
+ "Cannot create EnvelopeEncryptionManager because table key encryption key ID is not specified");
+ Preconditions.checkNotNull(kmsClient,
+ "Cannot create EnvelopeEncryptionManager because KmsClient is null");
+ this.kmsClient = kmsClient;
+ this.dataKeyLength = dataKeyLength;
+ this.kmsGeneratedKeys = kmsClient.supportsKeyGeneration();
+ }
+
+ @Override
+ public EncryptedOutputFile encrypt(OutputFile rawOutput) {
+ EnvelopeMetadata metadata = generateEnvelopeMetadata(dataEncryptionConfig);
Review Comment:
Same here, should generate keys only when confirming that encryption is required.
##########
core/src/main/java/org/apache/iceberg/encryption/EnvelopeMetadataParser.java:
##########
@@ -0,0 +1,81 @@
+/*
+ * 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.iceberg.encryption;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonNode;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.util.JsonUtil;
+
+public class EnvelopeMetadataParser {
+
+ private EnvelopeMetadataParser() {
+ }
+
+ private static final String KEK_ID = "kek-id";
+ private static final String WRAPPED_DEK = "wrapped-dek";
+ private static final String ALGORITHM = "algorithm";
+
+ public static void toJson(EnvelopeMetadata metadata, JsonGenerator generator) throws IOException {
+ generator.writeStartObject();
+
+ generator.writeStringField(KEK_ID, metadata.kekId());
+ generator.writeStringField(WRAPPED_DEK, metadata.wrappedDek());
+ JsonUtil.writeStringIf(null != metadata.algorithm(), ALGORITHM, metadata.algorithm().name(), generator);
+
+ generator.writeEndObject();
+ }
+
+ public static ByteBuffer toJson(EnvelopeMetadata metadata) {
+ try {
+ ByteArrayOutputStream stream = new ByteArrayOutputStream();
+ JsonGenerator generator = JsonUtil.factory().createGenerator(stream);
+ toJson(metadata, generator);
+ generator.flush();
+ return ByteBuffer.wrap(stream.toByteArray());
+ } catch (IOException e) {
+ throw new UncheckedIOException(e);
+ }
+ }
+
+ public static EnvelopeMetadata fromJson(JsonNode json) throws IOException {
+ Preconditions.checkArgument(json.isObject(), "Cannot parse envelope metadata from non-object: %s", json);
Review Comment:
nit: For the reason mentioned above by shangxinli, this check should also be replaced with an if block to avoiding string concat, it's called per file too.
##########
core/src/main/java/org/apache/iceberg/encryption/EnvelopeEncryptionManager.java:
##########
@@ -0,0 +1,152 @@
+/*
+ * 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.iceberg.encryption;
+
+import java.nio.ByteBuffer;
+import java.security.SecureRandom;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+
+/**
+ * Encryption manager which in conjunction with a KMS can encrypt {@link OutputFile} and decrypt
+ * {@link InputFile}. Envelope encryption uses a key wrapping strategy, where a Key Encryption Key (KEK) is used to
+ * wrap or unwrap a Data Encryption Key DEK which is used to encrypt the underlying files.
+ *
+ * When generating new DEKs for OutputFiles, this class will first attempt to have the KMS generate a new key. If the
+ * KMS does not support key generation a new key will be produced by pulling bytes from a {@link SecureRandom} on the
+ * JVM writing the file.
+ */
+public class EnvelopeEncryptionManager implements EncryptionManager {
+ private final EnvelopeConfiguration dataEncryptionConfig;
+ private final boolean nativeFormatEncryption;
+ private final KmsClient kmsClient;
+ private final int dataKeyLength;
+ private final boolean kmsGeneratedKeys;
+
+ private transient volatile SecureRandom workerRNG = null;
+
+ public static final String encryptionConfigMismatchMessagePrefix =
+ "Cannot create encryption manager - detected mismatch between client encryption properties and table " +
+ "encryption properties. Mismatch can be caused by changing encryption properties after table creation " +
+ "(currently not supported), or by malicious tampering with table properties kept in metadata.json in " +
+ "storage. Mismatch details: ";
+
+ /**
+ * @param nativeFormatEncryption true for native encryption inside file formats (Parquet or ORC), false for generic
+ * encryption of file streams
+ * @param dataEncryptionConfig configuration for encryption of data files. Future versions will add configuration for
+ * encryption of metadata files
+ * @param kmsClient Client of KMS used to wrap/unwrap keys in envelope encryption
+ * @param dataKeyLength If DEKs are not generated by KMS, they will be randomly generated by Iceberg using this length
+ */
+ public EnvelopeEncryptionManager(boolean nativeFormatEncryption, EnvelopeConfiguration dataEncryptionConfig,
+ KmsClient kmsClient, int dataKeyLength) {
+ if (!nativeFormatEncryption) {
+ throw new UnsupportedOperationException("EnvelopeEncryptionManager currently only supports encryption " +
+ "provided by the underlying file format.");
+ }
+ this.nativeFormatEncryption = nativeFormatEncryption;
+ Preconditions.checkNotNull(dataEncryptionConfig,
+ "Cannot create EnvelopeEncryptionManager because data encryption config is not passed");
+ this.dataEncryptionConfig = dataEncryptionConfig;
+ Preconditions.checkNotNull(dataEncryptionConfig.kekId(),
+ "Cannot create EnvelopeEncryptionManager because table key encryption key ID is not specified");
+ Preconditions.checkNotNull(kmsClient,
+ "Cannot create EnvelopeEncryptionManager because KmsClient is null");
+ this.kmsClient = kmsClient;
+ this.dataKeyLength = dataKeyLength;
+ this.kmsGeneratedKeys = kmsClient.supportsKeyGeneration();
+ }
+
+ @Override
+ public EncryptedOutputFile encrypt(OutputFile rawOutput) {
+ EnvelopeMetadata metadata = generateEnvelopeMetadata(dataEncryptionConfig);
+
+ if (nativeFormatEncryption) {
+ NativeFileCryptoParameters nativeEncryptParams = NativeFileCryptoParameters.create(metadata.dek())
+ .encryptionAlgorithm(metadata.algorithm())
+ .build();
+
+ if (!(rawOutput instanceof NativelyEncryptedFile)) {
+ throw new RuntimeException("Can't natively encrypt " + rawOutput.location() + " because the class " +
+ rawOutput.getClass() + " doesn't implement NativelyEncryptedFile interface");
+ }
+
+ ((NativelyEncryptedFile) rawOutput).setNativeCryptoParameters(nativeEncryptParams);
+
+ return new BaseEncryptedOutputFile(rawOutput, metadata);
+ } else {
+ throw new UnsupportedOperationException("EnvelopeEncryptionManager currently supports only file formats which " +
+ "have native encryption implementations");
+ }
+ }
+
+ @Override
+ public InputFile decrypt(EncryptedInputFile encrypted) {
+ if (encrypted.keyMetadata().buffer() == null) { // unencrypted file
+ return encrypted.encryptedInputFile();
+ }
+ EnvelopeMetadata metadata = EnvelopeMetadataParser.fromJson(encrypted.keyMetadata().buffer());
+ ByteBuffer fileDek = kmsClient.unwrapKey(metadata.wrappedDek(), metadata.kekId());
+
+ if (nativeFormatEncryption) {
+ // Pushdown to data formats with native decryption support (such as Parquet)
+ NativeFileCryptoParameters nativeDecryptParams = NativeFileCryptoParameters.create(fileDek).build();
+ InputFile rawInput = encrypted.encryptedInputFile();
+
+ if (!(rawInput instanceof NativelyEncryptedFile)) {
+ throw new RuntimeException("Can't natively decrypt " + rawInput.location() + " because the class " +
+ rawInput.getClass() + " doesn't implement NativelyEncryptedFile interface");
+ }
+
+ ((NativelyEncryptedFile) rawInput).setNativeCryptoParameters(nativeDecryptParams);
+
+ return rawInput;
+ } else {
+ throw new UnsupportedOperationException("EnvelopeEncryptionManager currently supports only file formats which " +
+ "have native encryption implementations");
+ }
+ }
+
+ private EnvelopeMetadata generateEnvelopeMetadata(EnvelopeConfiguration config) {
+ String tableKekID = config.kekId();
+ byte[] fileDek;
+ String wrappedFileDEK;
+
+ if (kmsGeneratedKeys) {
+ KmsClient.KeyGenerationResult generatedDek = kmsClient.generateKey(tableKekID);
+ fileDek = generatedDek.key().array();
+ wrappedFileDEK = generatedDek.wrappedKey();
Review Comment:
nit: `fileDek` but `wrappedFileDEK `, different style.
##########
core/src/main/java/org/apache/iceberg/encryption/EnvelopeEncryptionManager.java:
##########
@@ -0,0 +1,152 @@
+/*
+ * 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.iceberg.encryption;
+
+import java.nio.ByteBuffer;
+import java.security.SecureRandom;
+import org.apache.iceberg.io.InputFile;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+
+/**
+ * Encryption manager which in conjunction with a KMS can encrypt {@link OutputFile} and decrypt
+ * {@link InputFile}. Envelope encryption uses a key wrapping strategy, where a Key Encryption Key (KEK) is used to
+ * wrap or unwrap a Data Encryption Key DEK which is used to encrypt the underlying files.
+ *
+ * When generating new DEKs for OutputFiles, this class will first attempt to have the KMS generate a new key. If the
+ * KMS does not support key generation a new key will be produced by pulling bytes from a {@link SecureRandom} on the
+ * JVM writing the file.
+ */
+public class EnvelopeEncryptionManager implements EncryptionManager {
+ private final EnvelopeConfiguration dataEncryptionConfig;
+ private final boolean nativeFormatEncryption;
+ private final KmsClient kmsClient;
+ private final int dataKeyLength;
+ private final boolean kmsGeneratedKeys;
+
+ private transient volatile SecureRandom workerRNG = null;
+
+ public static final String encryptionConfigMismatchMessagePrefix =
+ "Cannot create encryption manager - detected mismatch between client encryption properties and table " +
+ "encryption properties. Mismatch can be caused by changing encryption properties after table creation " +
+ "(currently not supported), or by malicious tampering with table properties kept in metadata.json in " +
+ "storage. Mismatch details: ";
+
+ /**
+ * @param nativeFormatEncryption true for native encryption inside file formats (Parquet or ORC), false for generic
+ * encryption of file streams
+ * @param dataEncryptionConfig configuration for encryption of data files. Future versions will add configuration for
+ * encryption of metadata files
+ * @param kmsClient Client of KMS used to wrap/unwrap keys in envelope encryption
+ * @param dataKeyLength If DEKs are not generated by KMS, they will be randomly generated by Iceberg using this length
+ */
+ public EnvelopeEncryptionManager(boolean nativeFormatEncryption, EnvelopeConfiguration dataEncryptionConfig,
Review Comment:
nit: an extra space after `nativeFormatEncryption`.
##########
core/src/main/java/org/apache/iceberg/encryption/EnvelopeMetadataParser.java:
##########
@@ -0,0 +1,81 @@
+/*
+ * 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.iceberg.encryption;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonNode;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
+import org.apache.iceberg.util.JsonUtil;
+
+public class EnvelopeMetadataParser {
+
+ private EnvelopeMetadataParser() {
+ }
+
+ private static final String KEK_ID = "kek-id";
+ private static final String WRAPPED_DEK = "wrapped-dek";
+ private static final String ALGORITHM = "algorithm";
+
+ public static void toJson(EnvelopeMetadata metadata, JsonGenerator generator) throws IOException {
+ generator.writeStartObject();
+
+ generator.writeStringField(KEK_ID, metadata.kekId());
+ generator.writeStringField(WRAPPED_DEK, metadata.wrappedDek());
+ JsonUtil.writeStringIf(null != metadata.algorithm(), ALGORITHM, metadata.algorithm().name(), generator);
+
+ generator.writeEndObject();
+ }
+
+ public static ByteBuffer toJson(EnvelopeMetadata metadata) {
+ try {
+ ByteArrayOutputStream stream = new ByteArrayOutputStream();
+ JsonGenerator generator = JsonUtil.factory().createGenerator(stream);
Review Comment:
JsonGenerator is a Closeable, does it need to be closed here?
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