verify: check hashes

git-svn-id: https://svn.fournier38.fr/svn/ProgSVN/trunk@3754 bf3deb0d-5f1a-0410-827f-c0cc1f45334c

verify.php

@@ -349,4 +349,30 @@ class verify
     return true;
   }
 
+  /** Return true if the provided string is a valid hash
+    * @param string $algo The hash algo to test
+    * @param string $val The value to test
+    */
+  public function isHash ($algo, $val)
+  {
+    return \verify::IsHash ($algo, $val);
+  }
+
+  /** Return true if the provided string is a valid hash in static
+    * @param string $algo The hash algo to test
+    * @param string $val The value to test
+    */
+  public static function staticIsHash ($algo, $val)
+  {
+    if (! is_string ($algo) || ! is_string ($val))
+      return false;
+    if (! in_array ($algo, hash_algos ()))
+      throw new \Exception ("Unknown algo provided to verify the hash", 500);
+    $len = strlen (hash ($algo, ""));
+    if (strlen ($val) !== $len)
+      return false;
+    if (\verify::staticIsAllowedChars ($val, "0123456789abcdef") === false)
+      return false;
+    return true;
+  }
 }