szlta commented on code in PR #13225:
URL: https://github.com/apache/iceberg/pull/13225#discussion_r2555523119


##########
core/src/main/java/org/apache/iceberg/rest/RESTTableOperations.java:
##########
@@ -166,7 +208,67 @@ public void commit(TableMetadata base, TableMetadata 
metadata) {
 
   @Override
   public FileIO io() {
-    return io;
+    if (encryptionKeyId == null) {
+      return io;
+    }
+
+    if (encryptingFileIO == null) {
+      encryptingFileIO = EncryptingFileIO.combine(io, encryption());
+    }
+
+    return encryptingFileIO;
+  }
+
+  @Override
+  public EncryptionManager encryption() {
+    if (encryptionManager != null) {
+      return encryptionManager;
+    }
+
+    if (encryptionKeyId != null) {
+      if (kmsClient == null) {
+        throw new RuntimeException(
+            "Cant create encryption manager, because key management client is 
not set");
+      }
+
+      Map<String, String> tableProperties = Maps.newHashMap();
+      tableProperties.put(TableProperties.ENCRYPTION_TABLE_KEY, 
encryptionKeyId);
+      tableProperties.put(
+          TableProperties.ENCRYPTION_DEK_LENGTH, 
String.valueOf(encryptionDekLength));
+      encryptionManager =
+          EncryptionUtil.createEncryptionManager(
+              encryptedKeysFromMetadata, tableProperties, kmsClient);
+    } else {
+      return PlaintextEncryptionManager.instance();
+    }
+
+    return encryptionManager;
+  }
+
+  private void encryptionPropsFromMetadata(TableMetadata metadata) {

Review Comment:
   One aspect of having an encrypted metadata.json is when the table schema is 
also considered a sensitive piece of information. I haven't found this in the 
discussions but do you know if this has ever been considered @ggershinsky ? 



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