JsonWebToken exposes Header Claims #3170
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Pull Request Overview
This pull request exposes the JWT header claims by adding an API to retrieve the header claims as a list of Claim objects. It also adds tests to ensure that the default header claims ("alg", "typ", and "kid") are present.
- Added a new property HeaderClaims to return header claims.
- Introduced a test case verifying the header claims count and content.
Reviewed Changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| test/Microsoft.IdentityModel.JsonWebTokens.Tests/JsonWebTokenTests.cs | Added test verifying the HeaderClaims API returns default claims. |
| src/Microsoft.IdentityModel.JsonWebTokens/JsonWebToken.cs | Added the HeaderClaims property to expose JWT header claims. |
SummarySummary
CoverageMicrosoft.IdentityModel.JsonWebTokens - 80.3%
|
keegan-caruso
commented
Mar 12, 2025
| /// A <see cref="Claim"/> requires each value to be represented as a string. If the value was not a string, then <see cref="Claim.Type"/> contains the json type. | ||
| /// <see cref="JsonClaimValueTypes"/> and <see cref="ClaimValueTypes"/> to determine the json type. | ||
| /// </remarks> | ||
| public IReadOnlyList<Claim> HeaderClaims => Header.Claims(Issuer ?? ClaimsIdentity.DefaultIssuer); |
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Alternatives: Only expose header names, and then call GetHeaderValue(key) with each key from the header names, or reparse the encoded header
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JsonWebToken exposes Header Claims
The JsonWebToken should provide an API that allows access to the JWT header keys, values, and claim value types, this is done already through the Claim type.
Fixes #3164