1 files changed, 38 insertions, 0 deletions
diff --git a/core/classes/authentication/Core/PasswordTrait.php b/core/classes/authentication/Core/PasswordTrait.php
new file mode 100644
index 0000000..40a7381
--- /dev/null
+++ b/core/classes/authentication/Core/PasswordTrait.php
@@ -0,0 +1,38 @@
+<?php
+/** Trait PasswordTrait
+ * 
+ * @package DevCoder\Authentication\Core
+ * 
+ */
+# namespace DevCoder\Authentication\Core;
+# 
+# use DevCoder\Authentication\UserInterface;
+
+trait PasswordTrait
+{
+    
+    private $cost = 10;     // Cost must be in the range of 4-31
+            // a cost value in the range of 8-11
+            // is a good balance between performance and security
+
+
+    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 > 31) {
+            throw new \InvalidArgumentException('Cost must be in the range of 4-31.');
+        }
+        $this->cost = $cost;
+    }
+}