1 files changed, 40 insertions, 0 deletions
diff --git a/classes/authenticator/PasswordTrait.php b/classes/authenticator/PasswordTrait.php
new file mode 100644
index 0000000..22976d8
--- /dev/null
+++ b/classes/authenticator/PasswordTrait.php
@@ -0,0 +1,40 @@
+<?php
+
+
+// namespace DevCoder\Authentication\Core;
+// 
+// use DevCoder\Authentication\UserInterface;
+
+/**
+ * Trait PasswordTrait
+ * @package DevCoder\Authentication\Core
+ */
+trait PasswordTrait
+{
+    private $cost = 10;
+
+    public function cryptPassword(string $plainPassword): string
+    {
+        return password_hash(
+            $plainPassword,
+            PASSWORD_BCRYPT,
+            ['cost' => $this->cost]
+        );
+    }
+
+    public function isPasswordValid(UserInterface $user, string $plainPassword): bool
+    {
+        return password_verify(
+            $plainPassword,
+            $user->getPassword()
+        );
+    }
+
+    public function setCost(int $cost): void
+    {
+        if ($cost < 4 || $cost > 12) {
+            throw new \InvalidArgumentException('Cost must be in the range of 4-31.');
+        }
+        $this->cost = $cost;
+    }
+}