Support Parquet Modular Encryption for Trino

lib/trino-parquet/pom.xml

@@ -47,6 +47,11 @@
             <artifactId>units</artifactId>
         </dependency>
 
+        <dependency>
+            <groupId>io.trino</groupId>
+            <artifactId>trino-filesystem</artifactId>
+        </dependency>
+
         <dependency>
             <groupId>io.trino</groupId>
             <artifactId>trino-memory-context</artifactId>

lib/trino-parquet/src/main/java/io/trino/parquet/DataPage.java

@@ -13,6 +13,8 @@
  */
 package io.trino.parquet;
 
+import io.airlift.slice.Slice;
+
 import java.util.OptionalLong;
 
 public abstract sealed class DataPage
@@ -41,4 +43,6 @@ public int getValueCount()
     {
         return valueCount;
     }
+
+    public abstract Slice getSlice();
 }

lib/trino-parquet/src/main/java/io/trino/parquet/EncryptionUtils.java

@@ -0,0 +1,61 @@
+/*
+ * Licensed 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 io.trino.parquet;
+
+import io.airlift.log.Logger;
+import io.trino.filesystem.Location;
+import io.trino.filesystem.TrinoFileSystem;
+import org.apache.parquet.crypto.FileDecryptionProperties;
+import org.apache.parquet.crypto.InternalFileDecryptor;
+import org.apache.parquet.crypto.TrinoCryptoConfigurationUtil;
+import org.apache.parquet.crypto.TrinoDecryptionPropertiesFactory;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.Optional;
+
+public class EncryptionUtils
+{
+    public static final Logger LOG = Logger.get(EncryptionUtils.class);
+
+    private EncryptionUtils() {}
+
+    public static Optional<InternalFileDecryptor> createDecryptor(ParquetReaderOptions parquetReaderOptions, Location filePath, TrinoFileSystem trinoFileSystem)
+    {
+        if (parquetReaderOptions == null || filePath == null || trinoFileSystem == null) {
+            return Optional.empty();
+        }
+
+        TrinoDecryptionPropertiesFactory cryptoFactory = loadDecryptionPropertiesFactory(parquetReaderOptions);
+        FileDecryptionProperties fileDecryptionProperties = (cryptoFactory == null) ? null : cryptoFactory.getFileDecryptionProperties(parquetReaderOptions, filePath, trinoFileSystem);
+        return (fileDecryptionProperties == null) ? Optional.empty() : Optional.of(new InternalFileDecryptor(fileDecryptionProperties));
+    }
+
+    private static TrinoDecryptionPropertiesFactory loadDecryptionPropertiesFactory(ParquetReaderOptions trinoParquetCryptoConfig)
+    {
+        final Class<?> foundClass = TrinoCryptoConfigurationUtil.getClassFromConfig(
+                trinoParquetCryptoConfig.getCryptoFactoryClass(), TrinoDecryptionPropertiesFactory.class);
+
+        if (foundClass == null) {
+            return null;
+        }
+
+        try {
+            return (TrinoDecryptionPropertiesFactory) foundClass.getConstructor().newInstance();
+        }
+        catch (InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
+            LOG.warn("could not instantiate decryptionPropertiesFactoryClass class: " + foundClass, e);
+            return null;
+        }
+    }
+}