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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 38c0a5f358
89 changed files with 5234 additions and 9 deletions
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15
docs/output/as-pkce-applier.txt Normal file
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# From spring-security-oauth2-client-7.1.1.jar
#
# The resolver applies its default PKCE customizer only when the registration's
# client authentication method is NONE - that is, only for public clients.
# A registration that has a client secret gets no code_challenge.
private static final java.util.function.Consumer<org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationRequest$Builder> DEFAULT_PKCE_APPLIER;
57: getstatic #209 // Field org/springframework/security/oauth2/core/ClientAuthenticationMethod.NONE:Lorg/springframework/security/oauth2/core/ClientAuthenticationMethod;
80: getstatic #230 // Field DEFAULT_PKCE_APPLIER:Ljava/util/function/Consumer;
31: invokestatic #427 // Method org/springframework/security/oauth2/client/web/OAuth2AuthorizationRequestCustomizers.withPkce:()Ljava/util/function/Consumer;
34: putstatic #230 // Field DEFAULT_PKCE_APPLIER:Ljava/util/function/Consumer;
# The fields and the opt-in setter:
private static final java.util.function.Consumer<org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationRequest$Builder> DEFAULT_PKCE_APPLIER;
public void setAuthorizationRequestCustomizer(java.util.function.Consumer<org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationRequest$Builder>);