skip hash for strlen for defaults

deemru · Nov 5, 2024 · edee2af · edee2af
1 parent 902202d
commit edee2af
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/Cryptash.php b/src/Cryptash.php
@@ -23,7 +23,12 @@ public function __construct( $psw, $ivsz = 4, $macsz = 4, $hash = 'sha256' )
         $this->psw = $psw;
         $this->hash = $hash;
         $this->ivsz = max( 0, $ivsz );
-        $this->cbcsz = strlen( hash( $this->hash, '', true ) );
+        switch( $hash )
+        {
+            case 'sha256': $this->cbcsz = 32; break;
+            case 'sha512': $this->cbcsz = 64; break;
+            default: $this->cbcsz = strlen( hash( $this->hash, '', true ) );
+        }
         $this->macsz = min( $macsz, $this->cbcsz );
     }