diff --git a/OCCommunicationLib/OCCommunicationLib/OCWebDavClient/OCWebDAVClient.m b/OCCommunicationLib/OCCommunicationLib/OCWebDavClient/OCWebDAVClient.m
index 24f251f..edf0688 100755
--- a/OCCommunicationLib/OCCommunicationLib/OCWebDavClient/OCWebDAVClient.m
+++ b/OCCommunicationLib/OCCommunicationLib/OCWebDavClient/OCWebDAVClient.m
@@ -428,6 +428,7 @@ NSString const *OCWebDAVModificationDateKey	= @"modificationdate";
     NSMutableURLRequest *request = [self requestWithMethod:_requestMethod path:remoteDestination parameters:nil];
     [request setTimeoutInterval:k_timeout_upload];
     [request setValue:[NSString stringWithFormat:@"%lld", [UtilsFramework getSizeInBytesByPath:localSource]] forHTTPHeaderField:@"Content-Length"];
+    [request setValue:[NSString stringWithFormat:@"SHA1:%@", [UtilsFramework getShasumByPath:localSource]] forHTTPHeaderField:@"OC-Checksum"];
     [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
     [request setHTTPBodyStream:[NSInputStream inputStreamWithFileAtPath:localSource]];
     //[request setHTTPBody:[NSData dataWithContentsOfFile:localSource]];
@@ -484,6 +485,7 @@ NSString const *OCWebDAVModificationDateKey	= @"modificationdate";
         NSMutableURLRequest *request = [self requestWithMethod:@"PUT" path:remoteDestination parameters:nil];
         [request setTimeoutInterval:k_timeout_upload];
         [request setValue:[NSString stringWithFormat:@"%lld", [UtilsFramework getSizeInBytesByPath:localSource]] forHTTPHeaderField:@"Content-Length"];
+        [request setValue:[NSString stringWithFormat:@"SHA1:%@", [UtilsFramework getShasumByPath:localSource]] forHTTPHeaderField:@"OC-Checksum"];
         [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
         
         //If is not nil is a redirection so we keep the original url server
diff --git a/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.h b/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.h
index 6ebd408..53da6d3 100644
--- a/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.h
+++ b/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.h
@@ -24,6 +24,7 @@
 //
 
 #import <Foundation/Foundation.h>
+#import <CommonCrypto/CommonDigest.h>
 
 @interface UtilsFramework : NSObject
 
@@ -113,6 +114,14 @@
  */
 + (long long) getSizeInBytesByPath:(NSString *) path;
 
+/**
+ * Method to return the sha1 sum of a file by a path
+ *
+ * @param NSString -> path of the file
+ *
+ * @return NSString -> sha1 sum of the file in the path
+ */
++ (NSString *) getShasumByPath: (NSString *) path;
 
 ///-----------------------------------
 /// @name isURLWithSamlFragment:
diff --git a/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.m b/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.m
index cd82e78..cf00133 100644
--- a/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.m
+++ b/OCCommunicationLib/OCCommunicationLib/Utils/UtilsFramework.m
@@ -352,9 +352,34 @@
     return fileLength;
 }
 
+///-----------------------------------
+/// @ name getShasumByPath
+///-----------------------------------
 
-
-
+/**
+ * Method to return the sha1 sum of a file by a path
+ *
+ * @param NSString -> path of the file
+ *
+ * @return NSString -> sha1 sum of the file in the path
+ */
++ (NSString *) getShasumByPath:(NSString *)path {
+    NSFileManager *fileManager = [NSFileManager defaultManager];
+    if( [fileManager fileExistsAtPath:path isDirectory:nil] ) {
+        NSData *data = [NSData dataWithContentsOfFile:path];
+        unsigned char digest[CC_SHA1_DIGEST_LENGTH];
+        CC_SHA1(data.bytes, (CC_LONG)data.length, digest);
+        
+        NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];
+        
+        for (int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++) {
+            [output appendFormat:@"%02x", digest[i]];
+        }
+        return output;
+    } else {
+        return @"";
+    }
+}
 
 ///-----------------------------------
 /// @name isURLWithSamlFragment: