Auth regression tests for CI: what to assert and why

This article discusses the importance of having a robust regression test suite for JWT (JSON Web Token) verification in production environments. Here are the key points:

1. Smoke Tests vs Regression Suites:

   • A smoke test confirms that JWT verification works.
   • A regression suite ensures that JWT verification correctly rejects invalid tokens, including known security issues.

2. Common JWT Verification Issues:

   • The article mentions several common but subtle issues in JWT verification implementations that can lead to security vulnerabilities if not properly addressed:
     1. Accepting tokens with incorrect audience claims.
     2. Failing to reject tokens signed with invalid keys.
     3. Not enforcing required custom claims.

3. Eight Patterns for Regression Testing:

   • The article outlines eight specific patterns or test cases that should be included in a JWT verification regression suite:
     1. Incorrect audience claim
     2. Invalid signature
     3. Missing required claim
     4. Forged signature
     5. JWKS (JSON Web Key Set) rotation drift
     6. Missing required claims
     7. Fuzzy hostname comparison for issuer validation
     8. Accepting tokens from incorrect issuers

Read the full article at DEV Community

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