# Validate a TOTP Code

Source: https://openflow.run/ja/templates/validate-a-totp-code/
Content language: en
Template revision: 5b4ebb0d2fbb329baf98dfe4b5d5ae6331e19984

ユーティリティ

Demonstrate validating a six-digit TOTP code against a Base32 secret.

[Open Flow で使用](https://console.openflow.run/flows?importUrl=https%3A%2F%2Fraw.githubusercontent.com%2Foomol-lab%2Fawesome-workflow-templates%2F5b4ebb0d2fbb329baf98dfe4b5d5ae6331e19984%2Fworkflows%2Fvalidate-a-totp-code%2Ftemplates%2Fvalidate-a-totp-code.openflow.json)

*   [Open Flow JSON](https://raw.githubusercontent.com/oomol-lab/awesome-workflow-templates/5b4ebb0d2fbb329baf98dfe4b5d5ae6331e19984/workflows/validate-a-totp-code/templates/validate-a-totp-code.openflow.json)
*   [n8n JSON](https://raw.githubusercontent.com/oomol-lab/awesome-workflow-templates/5b4ebb0d2fbb329baf98dfe4b5d5ae6331e19984/workflows/validate-a-totp-code/templates/validate-a-totp-code.n8n.json)

![Open Flow の Validate a TOTP Code ワークフロー](https://openflow.run/_astro/preview-light.C1FBW5WK_Z2srN99.webp)

Demonstrate validating a six-digit TOTP code against a Base32 secret.

## Setup and use

For Open Flow, bind a test Base32 secret to the secret Variable **TOTP\_SECRET**, then run with the six-digit code as a string. In n8n, set the example secret and code in **EXAMPLE FIELDS** and run manually. Use test values when exploring the workflow.

## Behavior

The workflow calculates TOTP using HMAC-SHA1, six digits and 30-second steps. It compares only the current step and returns `1` for a match or `0` for a non-match. A malformed Base32 secret stops the run. n8n routes the result through its true/false IF node; Open Flow returns `status` for a later condition.

This is a validation example. Production authentication also needs appropriate protection against repeated attempts and replay, secure secret handling and a clock policy. n8n stores the example fields in workflow data, so do not put production secrets there.

Inspiration & credits

## Changes to the source

*   Replace the source’s example secret and code with configuration. Open Flow uses a secret Variable and returns the status.

Adapted from [TOTP validation without creating a credential](https://github.com/Zie619/n8n-workflows/blob/ae8cf6dc5b873cbb4f74587aa9180ed3a9f70682/workflows/Manual/0558_Manual_Stickynote_Automation_Triggered.json) in [Zie619/n8n-workflows](https://github.com/Zie619/n8n-workflows). The source export does not identify a separate template author or license.

The collection’s [MIT notice](https://github.com/Zie619/n8n-workflows/blob/94007c1445d9258a7da116646b79473e7c7c3282/LICENSE) is pinned at a later revision. This is the collection notice at that revision; it does not establish a separate original template author’s license. Our changes are listed above; see [repository licensing](https://github.com/oomol-lab/awesome-workflow-templates/blob/5b4ebb0d2fbb329baf98dfe4b5d5ae6331e19984/README.md#licensing).

> MIT License
> 
> Copyright (c) 2025 Zie619
> 
> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
> 
> The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
> 
> THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

## 必要な設定

*   A test Base32 secret and current TOTP code

*   totp
*   examples
*   authentication

[GitHub で見る](https://github.com/oomol-lab/awesome-workflow-templates/blob/5b4ebb0d2fbb329baf98dfe4b5d5ae6331e19984/workflows/validate-a-totp-code/README.md)