The $algorithms array is only used when $algorithm is set

Author: rosier

Hasher/NativePasswordHasher.php

@@ -49,17 +49,17 @@ public function __construct(int $opsLimit = null, int $memLimit = null, int $cos
             throw new \InvalidArgumentException('$cost must be in the range of 4-31.');
         }
 
-        $algorithms = [1 => \PASSWORD_BCRYPT, '2y' => \PASSWORD_BCRYPT];
+        if (null !== $algorithm) {
+            $algorithms = [1 => \PASSWORD_BCRYPT, '2y' => \PASSWORD_BCRYPT];
 
-        if (\defined('PASSWORD_ARGON2I')) {
-            $algorithms[2] = $algorithms['argon2i'] = (string) \PASSWORD_ARGON2I;
-        }
+            if (\defined('PASSWORD_ARGON2I')) {
+                $algorithms[2] = $algorithms['argon2i'] = (string) \PASSWORD_ARGON2I;
+            }
 
-        if (\defined('PASSWORD_ARGON2ID')) {
-            $algorithms[3] = $algorithms['argon2id'] = (string) \PASSWORD_ARGON2ID;
-        }
+            if (\defined('PASSWORD_ARGON2ID')) {
+                $algorithms[3] = $algorithms['argon2id'] = (string) \PASSWORD_ARGON2ID;
+            }
 
-        if (null !== $algorithm) {
             $this->algorithm = $algorithms[$algorithm] ?? $algorithm;
         }