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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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11
docs/output/as-rs-startup-failure.txt Normal file
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# resource-server started with spring.security.oauth2.resourceserver.jwt.issuer-uri
# pointing at an authorization server that is not running.
2026-08-24T08:03:18.544+05:30 WARN 3087 --- [resource-server] [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'api' defined in class path resource [com/ankurm/rs/SecurityConfig.class]: Failed to instantiate [org.springframework.security.web.SecurityFilterChain]: Factory method 'api' threw exception with message: Error creating bean with name 'jwtDecoder' defined in class path resource [com/ankurm/rs/SecurityConfig.class]: Failed to instantiate [org.springframework.security.oauth2.jwt.JwtDecoder]: Factory method 'jwtDecoder' threw exception with message: Unable to resolve the Configuration with the provided Issuer of "http://localhost:9000"
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'api' defined in class path resource [com/ankurm/rs/SecurityConfig.class]: Failed to instantiate [org.springframework.security.web.SecurityFilterChain]: Factory method 'api' threw exception with message: Error creating bean with name 'jwtDecoder' defined in class path resource [com/ankurm/rs/SecurityConfig.class]: Failed to instantiate [org.springframework.security.oauth2.jwt.JwtDecoder]: Factory method 'jwtDecoder' threw exception with message: Unable to resolve the Configuration with the provided Issuer of "http://localhost:9000"
org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.security.web.SecurityFilterChain]: Factory method 'api' threw exception with message: Error creating bean with name 'jwtDecoder' defined in class path resource [com/ankurm/rs/SecurityConfig.class]: Failed to instantiate [org.springframework.security.oauth2.jwt.JwtDecoder]: Factory method 'jwtDecoder' threw exception with message: Unable to resolve the Configuration with the provided Issuer of "http://localhost:9000"
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jwtDecoder' defined in class path resource [com/ankurm/rs/SecurityConfig.class]: Failed to instantiate [org.springframework.security.oauth2.jwt.JwtDecoder]: Factory method 'jwtDecoder' threw exception with message: Unable to resolve the Configuration with the provided Issuer of "http://localhost:9000"
org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.security.oauth2.jwt.JwtDecoder]: Factory method 'jwtDecoder' threw exception with message: Unable to resolve the Configuration with the provided Issuer of "http://localhost:9000"
java.lang.IllegalArgumentException: Unable to resolve the Configuration with the provided Issuer of "http://localhost:9000"
org.springframework.web.client.ResourceAccessException: I/O error on GET request for "http://localhost:9000/.well-known/openid-configuration": Connection refused (connect failed)
java.net.ConnectException: Connection refused (connect failed)