Update ChunkedFileUploadRemoteOperation.java

Signed-off-by: Alexander-Ger-Reich <[email protected]>

Author: Alexander-Ger-Reich

library/src/main/java/com/owncloud/android/lib/resources/files/ChunkedFileUploadRemoteOperation.java

@@ -36,6 +36,11 @@
 
 import androidx.annotation.VisibleForTesting;
 
+import java.io.FileInputStream;
+import java.security.DigestInputStream;
+import java.security.MessageDigest;
+import java.nio.ByteBuffer;
+import java.math.BigInteger;
 
 public class ChunkedFileUploadRemoteOperation extends UploadFileRemoteOperation {
 
@@ -216,6 +221,24 @@ protected RemoteOperationResult run(OwnCloudClient client) {
             moveMethod = new MoveMethod(originUri, destinationUri, true);
             moveMethod.addRequestHeader(OC_X_OC_MTIME_HEADER, String.valueOf(lastModificationTimestamp));
 
+            try {
+                File file_hash = new File(localPath);
+                MessageDigest md = MessageDigest.getInstance("SHA-256");
+                
+                try (FileInputStream fis = new FileInputStream(file_hash);
+                     DigestInputStream dis = new DigestInputStream(fis, md)) {
+                        byte[] buffer = new byte[8192];
+                        while (dis.read(buffer) != -1) {
+                        // digest is updated by reading
+                    }
+                }
+
+                String Hash = String.format("%064x", new BigInteger(1, md.digest()));
+                moveMethod.addRequestHeader("X-Content-Hash", Hash);
+            } catch (Exception e) {
+                Log_OC.w(TAG, "Could not compute chunk hash");
+            }
+
             if (creationTimestamp != null && creationTimestamp > 0) {
                 moveMethod.addRequestHeader(OC_X_OC_CTIME_HEADER, String.valueOf(creationTimestamp));
             }
@@ -291,6 +314,22 @@ private RemoteOperationResult uploadChunk(OwnCloudClient client, Chunk chunk) th
                 putMethod.addRequestHeader(E2E_TOKEN, token);
             }
 
+            try (RandomAccessFile hashRaf = new RandomAccessFile(file, "r")){
+                MessageDigest md = MessageDigest.getInstance("SHA-256");
+
+                FileChannel hashChannel = hashRaf.getChannel();
+                ByteBuffer buf = ByteBuffer.allocate((int)chunk.getLength());
+                hashChannel.position(chunk.getStart());
+                hashChannel.read(buf);
+                md.update(buf.array());
+
+                String chunkHash = String.format("%064x", new BigInteger(1, md.digest()));
+
+                putMethod.addRequestHeader("X-Content-Hash", chunkHash);
+            } catch (Exception e) {
+                Log_OC.w(TAG, "Could not compute chunk hash");
+            }
+
             status = client.executeMethod(putMethod);
 
             result = new RemoteOperationResult(isSuccess(status), putMethod);