[FEATURE] option to randomize file hash

By configuring `file_hash` option to `random`, file deduplication is not
effective anymore but file is not hashed.

Signed-off-by: Jerome Jutteau <jerome@jutteau.fr>

diff --git a/lib/config.original.php b/lib/config.original.php
index 2fe91fdd3e619852b8fc0e339013b37d0d54eea7..1591ae8d8fa58db2936aa359bf2fa2cd34de2a21 100644 (file)
--- a/lib/config.original.php
+++ b/lib/config.original.php
@@ -152,7 +152,8 @@ $cfg['proxy_ip'] = array();
  * By default, files are hashed through md5 but other methods are available.
  * Possible values are 'md5' and 'md5_outside'.
  * With 'md5' option, the whole file is hashed through md5. This is the default.
- * With 'md5_outside', md5 is used to hash the first part of the file, the last part of the file
+ * With 'md5_outside', md5 is used to hash the first part of the file, the last part of the file.
+ * With 'random', file hash not set to a random value and file deduplication cannot work anymore but it is fast and safe.
  * and the file's size. This method is fast for large files but cannot be perfect.
  */
 $cfg['file_hash'] = 'md5';

diff --git a/lib/functions.php b/lib/functions.php
index 5a5316c2e1ec11560e915710d43541843ad04090..1dd03e54b55af485ad276643fb2e726ff8b897fc 100644 (file)
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -321,7 +321,7 @@ function jirafeau_delete_file($hash)
 
 
 /** hash file's content
- * @param $method hash method, see 'file_hash' option. 'md5' or 'md5_outside'.
+ * @param $method hash method, see 'file_hash' option. Valid methods are 'md5', 'md5_outside' or 'random'
  * @param $file_path file to hash
  * @returns hash string
  */
@@ -332,6 +332,8 @@ function jirafeau_hash_file($method, $file_path)
             return jirafeau_md5_outside($file_path);
         case 'md5':
             return md5_file($file_path);
+        case 'random':
+            return jirafeau_gen_random(32);
     }
     return md5_file($file_path);
 }