feat: add cryptography app with createHmac action

packages/backend/src/apps/cryptography/actions/create-hmac/index.js

@@ -0,0 +1,50 @@
+import { createHmac } from 'node:crypto';
+import defineAction from '../../../../helpers/define-action.js';
+
+export default defineAction({
+  name: 'Create HMAC',
+  key: 'createHmac',
+  description: 'Create a Hash-based Message Authentication Code (HMAC) using the specified algorithm, secret key, and message data.',
+  arguments: [
+    {
+      label: 'Algorithm',
+      key: 'algorithm',
+      type: 'dropdown',
+      required: true,
+      value: 'sha256',
+      description: 'Specifies the cryptographic hash function to use for HMAC generation.',
+      options: [
+        { label: 'SHA-256 ', value: 'sha256' },
+      ],
+      variables: true,
+    },
+    {
+      label: 'Secret key',
+      key: 'secretKey',
+      type: 'string',
+      required: true,
+      description: 'The secret key used to create the HMAC.',
+      variables: true,
+    },
+    {
+      label: 'Message data',
+      key: 'data',
+      type: 'string',
+      required: true,
+      description: 'The input data or message to be hashed. This is the data that will be processed to generate the HMAC.',
+      variables: true,
+    },
+  ],
+
+  async run($) {
+    const hash = createHmac($.step.parameters.algorithm, $.step.parameters.secretKey)
+      .update($.step.parameters.data)
+      .digest('hex');
+
+    $.setActionItem({
+      raw: {
+        hash
+      },
+    });
+  },
+});