feat: additional validation for dynamic secret

backend/src/ee/services/dynamic-secret/providers/redis.ts

@@ -5,6 +5,7 @@ import { z } from "zod";
 
 import { BadRequestError } from "@app/lib/errors";
 import { alphaNumericNanoId } from "@app/lib/nanoid";
+import { validateHandlebarTemplate } from "@app/lib/template/validate-handlebars";
 
 import { verifyHostInputValidity } from "../dynamic-secret-fns";
 import { DynamicSecretRedisDBSchema, TDynamicProviderFns } from "./models";
@@ -51,7 +52,19 @@ const executeTransactions = async (connection: Redis, commands: string[]): Promi
 export const RedisDatabaseProvider = (): TDynamicProviderFns => {
   const validateProviderInputs = async (inputs: unknown) => {
     const providerInputs = await DynamicSecretRedisDBSchema.parseAsync(inputs);
-    verifyHostInputValidity(providerInputs.host);
+    await verifyHostInputValidity(providerInputs.host);
+    validateHandlebarTemplate("Redis creation", providerInputs.creationStatement, {
+      allowedExpressions: (val) => ["username", "password", "expiration"].includes(val)
+    });
+    if (providerInputs.renewStatement) {
+      validateHandlebarTemplate("Redis renew", providerInputs.renewStatement, {
+        allowedExpressions: (val) => ["username", "expiration"].includes(val)
+      });
+    }
+    validateHandlebarTemplate("Redis revoke", providerInputs.revocationStatement, {
+      allowedExpressions: (val) => ["username"].includes(val)
+    });
+
     return providerInputs;
   };