ggershinsky commented on code in PR #7770:
URL: https://github.com/apache/iceberg/pull/7770#discussion_r1718009497
##########
core/src/main/java/org/apache/iceberg/encryption/StandardEncryptionManager.java:
##########
@@ -20,28 +20,46 @@
import java.nio.ByteBuffer;
import java.security.SecureRandom;
+import java.util.Base64;
+import java.util.Map;
+import org.apache.iceberg.CatalogProperties;
import org.apache.iceberg.TableProperties;
import org.apache.iceberg.io.InputFile;
import org.apache.iceberg.io.OutputFile;
import org.apache.iceberg.io.SeekableInputStream;
import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
import org.apache.iceberg.relocated.com.google.common.collect.Iterables;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
import org.apache.iceberg.util.ByteBuffers;
public class StandardEncryptionManager implements EncryptionManager {
+ public static final int KEK_ID_LENGTH = 16;
+
private final transient KeyManagementClient kmsClient;
private final String tableKeyId;
private final int dataKeyLength;
-
+ private final long kekCacheTimeout;
+ private Map<String, KeyEncryptionKey> kekCache;
private transient volatile SecureRandom lazyRNG = null;
+ /**
+ * @deprecated will be removed in 2.0.0. use {@link
#StandardEncryptionManager(String, int,
+ * KeyManagementClient, long)} instead.
+ */
+ @Deprecated
+ public StandardEncryptionManager(
+ String tableKeyId, int dataKeyLength, KeyManagementClient kmsClient) {
+ this(tableKeyId, dataKeyLength, kmsClient,
CatalogProperties.KEK_CACHE_TIMEOUT_MS_DEFAULT);
+ }
+
/**
* @param tableKeyId table encryption key id
* @param dataKeyLength length of data encryption key (16/24/32 bytes)
* @param kmsClient Client of KMS used to wrap/unwrap keys in envelope
encryption
+ * @param kekCacheTimeout timeout of kek (key encryption key) cache entries
*/
public StandardEncryptionManager(
- String tableKeyId, int dataKeyLength, KeyManagementClient kmsClient) {
+ String tableKeyId, int dataKeyLength, KeyManagementClient kmsClient,
long kekCacheTimeout) {
Review Comment:
Actually, we have an explicit NIST recommendation for this in
https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf
_"The recommended originator-usage period for a symmetric key-wrapping
key that is used to wrap very large numbers of keys over a short period of
time is on the
order of a day or a week. If a relatively small number of keys are to be
wrapped under a
key-wrapping key, the originator-usage period of the key-wrapping key could
be up to
two years. "_
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