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Add Spring Authorization Server project: OAuth2/OIDC provider, client and resource server

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Three modules on Spring Boot 4.1.1 with Spring Authorization Server 7.1.1: the provider
itself, a relying party, and an API that trusts its tokens. Client registration, PKCE,
a custom consent page and token customisation, with profiles that make each failure
reproducible.

Every claim is backed by captured output in docs/output/as-*.txt, regenerated by
authorization-server/scripts/run-all.sh. Notable findings, verified against the jars:

  - OAuth2AuthorizationServerConfiguration.applyDefaultSecurity(HttpSecurity) was deleted
    in 7.0, and both configuration classes moved into spring-security-config
  - ClientSettings.requireProofKey flipped from false to true, on the authorization server
    (1.5.8 -> 7.1.1) and on the OAuth2 client (6.5.1 -> 7.1.1)
  - requireProofKey(false) does not make PKCE optional for a public client; the code
    verifier is that client's only authentication at the token endpoint
  - MediaTypeRequestMatcher(TEXT_HTML) matches Accept: */*, so the token endpoint answers
    API callers with 302 -> /login unless setIgnoredMediaTypes(ALL) is called

Also renames the repository to spring-auth-demo and cross-links the new chapter set from
the existing documentation.
This commit is contained in:
Ankur Mhatre
2026-08-24 08:12:36 +05:30
parent 4dc45d5e00
commit e9381dc5be
89 changed files with 5237 additions and 9 deletions
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6
docs/17-keycloak-setup.md
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@@ -151,3 +151,9 @@ unless reconfigured. Keycloak puts the client in `azp`.
---
[← what an unknown kid costs](16-jwks-amplification.md) · [next: resource server checklist →](18-resource-server-checklist.md)
---
For the comparison Keycloak invites — what it costs to run the equivalent yourself in
Spring — see [`authorization-server/`](authorization-server/README.md), and in
particular [10 — Should you run one at all](authorization-server/10-should-you.md).