feat: add create hmac signature

Author: danpoletaev

package-lock.json

@@ -49,7 +49,8 @@
     },
     "dependencies": {
         "@apify/consts": "^2.37.0",
-        "@apify/log": "^2.5.13"
+        "@apify/log": "^2.5.13",
+        "base62": "^2.0.2"
     },
     "devDependencies": {
         "@types/create-hmac": "^1.1.0"

packages/utilities/package.json

@@ -0,0 +1,20 @@
+import crypto from 'crypto';
+
+import base62 from 'base62';
+
+/**
+ * Generates an HMAC signature and encodes it using Base62.
+ * Base62 encoding reduces the signature length.
+ *
+ * @param secretKey {string} Secret key used for signing signatures
+ * @param message {string} Message to be signed
+ * @returns string
+ */
+export function createHmacSignature(secretKey: string, message: string): string {
+    const signature = crypto.createHmac('sha256', secretKey)
+        .update(message)
+        .digest('hex')
+        .substring(0, 30);
+
+    return base62.encode(parseInt(signature, 16));
+}

packages/utilities/src/hmac.ts

@@ -8,3 +8,4 @@ export * from './webhook_payload_template';
 export * from './crypto';
 export * from './url_params_utils';
 export * from './code_hash_manager';
+export * from './hmac';