ユーティリティ

Validate a TOTP Code

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 in Zie619/n8n-workflows. The source export does not identify a separate template author or license.

The collection’s MIT notice 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.

MIT License

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