validate checksum in footer separately for segment metadata files (#6931)

Signed-off-by: Varun Bansal <bansvaru@amazon.com>

Author: linuxpi

server/src/main/java/org/opensearch/common/io/VersionedCodecStreamWrapper.java

@@ -11,7 +11,6 @@
 import java.io.IOException;
 
 import org.apache.lucene.codecs.CodecUtil;
-import org.apache.lucene.store.BufferedChecksumIndexInput;
 import org.apache.lucene.store.ChecksumIndexInput;
 import org.apache.lucene.store.IndexInput;
 import org.apache.lucene.store.IndexOutput;
@@ -47,10 +46,9 @@ public VersionedCodecStreamWrapper(IndexIOStreamHandler<T> indexIOStreamHandler,
      * @return stream content parsed into {@link T}
      */
     public T readStream(IndexInput indexInput) throws IOException {
-        ChecksumIndexInput checksumIndexInput = new BufferedChecksumIndexInput(indexInput);
-        int readStreamVersion = checkHeader(checksumIndexInput);
-        T content = getHandlerForVersion(readStreamVersion).readContent(checksumIndexInput);
-        checkFooter(checksumIndexInput);
+        CodecUtil.checksumEntireFile(indexInput);
+        int readStreamVersion = checkHeader(indexInput);
+        T content = getHandlerForVersion(readStreamVersion).readContent(indexInput);
         return content;
     }
 

server/src/main/java/org/opensearch/index/store/RemoteSegmentStoreDirectory.java

@@ -17,6 +17,7 @@
 import org.apache.lucene.store.IndexInput;
 import org.apache.lucene.store.IndexOutput;
 import org.opensearch.common.UUIDs;
+import org.opensearch.common.lucene.store.ByteArrayIndexInput;
 import org.opensearch.index.store.remote.metadata.RemoteSegmentMetadata;
 import org.opensearch.common.io.VersionedCodecStreamWrapper;
 import org.opensearch.index.store.remote.metadata.RemoteSegmentMetadataHandler;
@@ -135,7 +136,9 @@ private Map<String, UploadedSegmentMetadata> readLatestMetadataFile() throws IOE
 
     private Map<String, UploadedSegmentMetadata> readMetadataFile(String metadataFilename) throws IOException {
         try (IndexInput indexInput = remoteMetadataDirectory.openInput(metadataFilename, IOContext.DEFAULT)) {
-            RemoteSegmentMetadata metadata = metadataStreamWrapper.readStream(indexInput);
+            byte[] metadataBytes = new byte[(int) indexInput.length()];
+            indexInput.readBytes(metadataBytes, 0, (int) indexInput.length());
+            RemoteSegmentMetadata metadata = metadataStreamWrapper.readStream(new ByteArrayIndexInput(metadataFilename, metadataBytes));
             return metadata.getMetadata();
         }
     }