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jwt-auth-demo/docs/output/expiry-and-clock-skew.txt
asmhatre 4a8dab6739 Spring Security 7.1 JWT authentication on Spring Boot 4.1
Runnable companion for https://ankurm.com/spring-security-7-1-jwt-authentication-guide/

- login -> token issue -> OncePerRequestFilter -> SecurityContext, end to end
- HS256 and RS256 variants (RS256 publishes a real JWKS endpoint)
- the same API secured by the built-in oauth2ResourceServer().jwt(), for comparison
- 11 documentation chapters under docs/, interlinked with the code
- docs/output/ is real captured output, regenerated by scripts/run-all.sh
- 13 passing tests pinning the 401-vs-403 contract and the CSRF failure

Verified against Spring Boot 4.1.1, Spring Security 7.1.1, JDK 25.0.4.1.
2026-08-22 06:34:43 +00:00

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==========================================================================
jwt-auth-demo - token expiry and the 60-second clock skew
profiles: hs256,shortlived (access-token-ttl = 2s)
==========================================================================
--------------------------------------------------------------------------
# T+0s - fresh token
HTTP 200
{
"name": "alice",
"authorities": [
"FACTOR_BEARER",
"ROLE_USER",
"SCOPE_profile:read"
--------------------------------------------------------------------------
# T+5s - exp has passed, but JwtTimestampValidator allows 60s of clock skew
# by default, so the token is STILL accepted. This surprises people
# who write a test that sleeps past exp and expects a 401.
HTTP 200
{
"name": "alice",
"authorities": [
"FACTOR_BEARER",
"ROLE_USER",
"SCOPE_profile:read"
--------------------------------------------------------------------------
# T+65s - past exp + the 60s skew window. Now it is refused.
HTTP 401
WWW-Authenticate: Bearer realm="jwt-auth-demo", error="invalid_token", error_description="An error occurred while attempting to decode the Jwt: Jwt expired at 2026-08-22T06:16:50Z", error_uri="https://tools.ietf.org/html/rfc6750#section-3.1", resource_metadata="http://localhost:8080/.well-known/oauth-protected-resource"
--------------------------------------------------------------------------
# end