ID Token Test Case Reviewer

Review test cases for ID Token generation and validation in OpenID Connect Basic OP.

Scope

Feature: ID Token Claims and Signature
Specifications: OIDC Core 1.0 Section 2, 3.1.3.6, 3.1.3.7
Profile: Basic OP (Authorization Code Flow)

Review Process

Identify which ID Token requirement the test targets
Check against the checklist below
Verify both valid and invalid token scenarios
Ensure signature algorithm (RS256) is tested
Report gaps with specific spec section references

ID Token Structure

Header.Payload.Signature

JOSE Header Requirements

| Field | Requirement | Example | |-------|-------------|---------| | alg | REQUIRED. Signing algorithm | RS256 | | kid | RECOMMENDED. Key ID | 1e9gdk7 | | typ | OPTIONAL. Type | JWT |

Required Claims Checklist

| Check | Claim | Requirement | Spec Reference | |-------|-------|-------------|----------------| | [ ] | iss | REQUIRED. Issuer Identifier (HTTPS URL, no query/fragment) | OIDC Core 2 | | [ ] | sub | REQUIRED. Subject Identifier (max 255 ASCII chars) | OIDC Core 2 | | [ ] | aud | REQUIRED. Audience (contains client_id) | OIDC Core 2 | | [ ] | exp | REQUIRED. Expiration time | OIDC Core 2 | | [ ] | iat | REQUIRED. Issued at time | OIDC Core 2 |

Conditional Claims Checklist

| Check | Claim | Condition | Spec Reference | |-------|-------|-----------|----------------| | [ ] | nonce | REQUIRED if nonce in auth request | OIDC Core 3.1.3.6 | | [ ] | auth_time | REQUIRED if max_age requested or auth_time essential | OIDC Core 2 | | [ ] | azp | REQUIRED if aud contains multiple values | OIDC Core 2 | | [ ] | at_hash | OPTIONAL for code flow | OIDC Core 3.1.3.6 |

Signature Requirements

| Check | Requirement | Spec Reference | |-------|-------------|----------------| | [ ] | ID Token MUST be signed JWT | OIDC Core 2 | | [ ] | Support RS256 algorithm (MANDATORY) | OIDC Core 15.1 | | [ ] | alg header parameter present | OIDC Core 2 | | [ ] | kid header parameter present if multiple keys | OIDC Core 10.1 |

Validation Rules (OP produces valid tokens)

| Check | Validation Rule | Spec Reference | |-------|-----------------|----------------| | [ ] | iss exactly matches OP's Issuer Identifier | OIDC Core 3.1.3.7 | | [ ] | aud contains requesting client's client_id | OIDC Core 3.1.3.7 | | [ ] | exp is in the future | OIDC Core 3.1.3.7 | | [ ] | Signature verifiable with OP's public key | OIDC Core 3.1.3.7 |

Test Case Categories

Issuer (`iss`) Tests

[ ] Valid: iss matches configured OP issuer exactly
[ ] Invalid: iss adds query parameters
[ ] Invalid: iss adds fragment
[ ] Invalid: iss differs by trailing slash
[ ] Invalid: iss differs by scheme (http vs https)
[ ] Invalid: iss is missing

Audience (`aud`) Tests

[ ] Valid: aud equals client_id (string)
[ ] Valid: aud is array containing client_id
[ ] Invalid: aud doesn't contain client_id
[ ] Invalid: aud is missing

Authorized Party (`azp`) Tests

[ ] Valid: Single aud, no azp required
[ ] Valid: Multiple aud, azp equals client_id
[ ] Warning: Multiple aud, azp missing
[ ] Invalid: azp present but doesn't match client_id

Expiration (`exp`) Tests

[ ] Valid: exp is in future
[ ] Valid: Small clock skew tolerance (typically 5 minutes)
[ ] Invalid: exp is in past
[ ] Invalid: exp is missing

Nonce Tests

[ ] Valid: nonce matches request nonce
[ ] Valid: No nonce in request, no nonce in token (code flow)
[ ] Invalid: nonce requested but missing in token
[ ] Invalid: nonce doesn't match request

Signature Tests

[ ] Valid: RS256 signature verifies with OP's public key
[ ] Valid: Retrieve key via kid from JWKS
[ ] Invalid: Signature doesn't verify
[ ] Invalid: Unknown kid
[ ] Invalid: Algorithm mismatch
[ ] Invalid: alg is none when signature required

Review Output Format

## Test Case: [Name]
### Target Feature: ID Token - [specific aspect]
### Test ID: OP-IDToken-[xxx]
### Spec Compliance:
- [x] Covers required behavior per [spec section]
- [ ] Missing: [specific requirement]
### Verdict: PASS / FAIL / PARTIAL
### Recommendations: [if any]

Example Valid ID Token

{
  "iss": "https://server.example.com",
  "sub": "248289761001",
  "aud": "s6BhdRkqt3",
  "nonce": "n-0S6_WzA2Mj",
  "exp": 1311281970,
  "iat": 1311280970
}