Webhook Authenticator (#232)

* Add custom class

Author: rmcdaniel

src/Auth/NullAuthenticator.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Workflow\Auth;
+
+use Illuminate\Http\Request;
+
+class NullAuthenticator implements WebhookAuthenticator
+{
+    public function validate(Request $request): bool
+    {
+        return true;
+    }
+}

src/Auth/SignatureAuthenticator.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Workflow\Auth;
+
+use Illuminate\Http\Request;
+
+class SignatureAuthenticator implements WebhookAuthenticator
+{
+    public function validate(Request $request): bool
+    {
+        return hash_equals(
+            $request->header(config('workflows.webhook_auth.signature.header')) ?? '',
+            hash_hmac('sha256', $request->getContent(), config('workflows.webhook_auth.signature.secret'))
+        );
+    }
+}

src/Auth/TokenAuthenticator.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Workflow\Auth;
+
+use Illuminate\Http\Request;
+
+class TokenAuthenticator implements WebhookAuthenticator
+{
+    public function validate(Request $request): bool
+    {
+        return $request->header(config('workflows.webhook_auth.token.header')) === config(
+            'workflows.webhook_auth.token.token'
+        );
+    }
+}

src/Auth/WebhookAuthenticator.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Workflow\Auth;
+
+use Illuminate\Http\Request;
+
+interface WebhookAuthenticator
+{
+    public function validate(Request $request): bool;
+}