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Enable header.typ assertion

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#1,004 1 comment 1 reaction 0 assignees View on GitHub

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
45/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
javascript

Research direction

Start by tracing the JWT verification entry point and how verification options are parsed, then inspect where token headers are validated. Use RFC 9068 to confirm the expected typ value and define completion as verification failing when the configured type is absent or different, while existing behavior remains unchanged when no type is configured.

Written by the indexing model from the issue text.

Description

Describe the problem you'd like to have solved

I would like to be able to differentiate between access tokens and identity tokens, and specifically to fail JWT validation if the token is not an access token.

Describe the ideal solution

We can assert that a token is an access token but checking the typ header for the value at+jwt. See https://datatracker.ietf.org/doc/rfc9068/

I would like to have a typ option which I could set to the required value, with JWT verification failing if the expected type is not found in the header.

Alternatives and current work-arounds

Do not share identity token to clients, so they cannot present id_token for authentication.

Additional context

n/a

Dominant language
JavaScript
Stars
18.2k
Forks
1.3k
PR merge metrics
No merged PRs in 30d

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