ggershinsky commented on a change in pull request #776:
URL: https://github.com/apache/parquet-mr/pull/776#discussion_r428584998



##########
File path: 
parquet-hadoop/src/main/java/org/apache/parquet/hadoop/ParquetFileReader.java
##########
@@ -705,22 +797,39 @@ public ParquetFileReader(Configuration conf, Path file, 
ParquetMetadata footer)
       paths.put(ColumnPath.get(col.getPath()), col);
     }
     this.crc = options.usePageChecksumVerification() ? new CRC32() : null;
+    this.fileDecryptor = fileMetaData.getFileDecryptor();
   }
 
   public ParquetFileReader(InputFile file, ParquetReadOptions options) throws 
IOException {
+    this(file, options, null);
+  }
+
+  public ParquetFileReader(InputFile file, ParquetReadOptions options, 
+      FileDecryptionProperties fileDecryptionProperties) throws IOException {
     this.converter = new ParquetMetadataConverter(options);
     this.file = file;
     this.f = file.newStream();
     this.options = options;
+    if ((null == fileDecryptionProperties) && (file instanceof 
HadoopInputFile)) {
+      HadoopInputFile hadoopFile = (HadoopInputFile) file;
+      fileDecryptionProperties = getDecryptionProperties(hadoopFile.getPath(), 
hadoopFile.getConfiguration());

Review comment:
       Sounds good. I'll check what can be done here.
   Also, will check how the deprecated readFooter functions can be handled for 
encryption.




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