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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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67
docs/output/as-client-credentials-noclaims.txt Normal file
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------------------------------------------------------------------
== POST /oauth2/token grant_type=client_credentials
------------------------------------------------------------------
$ curl -su demo-service:service-secret -d grant_type=client_credentials \
-d scope=orders.read http://localhost:9000/oauth2/token
{
"access_token": "eyJraWQiOiIyNDgwNWM5Ni02MGY1LTQ5MDItYTczYi03ODgxYmFkNWY5ZGMiLCJhbGciOiJSUzI1NiJ9.eyJzdWIiOiJkZW1vLXNlcnZpY2UiLCJhdWQiOiJkZW1vLXNlcnZpY2UiLCJuYmYiOjE3ODc1Mzg3MzksInNjb3BlIjpbIm9yZGVycy5yZWFkIl0sImlzcyI6Imh0dHA6Ly9sb2NhbGhvc3Q6OTAwMCIsImV4cCI6MTc4NzUzOTMzOSwiaWF0IjoxNzg3NTM4NzM5LCJqdGkiOiIzN2E0NTlmMS0xZjdlLTQ5ZTktOWQyNi01YmY0MjM5YmM1ZTkifQ.UxWq_Cs1bBhqQicgcLU7Z-vYW-jWxuVbrmco1gmXM8cxRvRjXoNpaDkYCiTI51gu21K9mXsOxf45l5dg7Rh9Gku7fNWJeKcWll5Ekcjpgq9msCwjLNPVxbuDVV8K-2f8OcPJ1Y6ojDtqxQq9RCBKEMxuBhl1Plz8nMjUYUm1A-njz43wL9SDJslz2xiIgoEkLkiRyVdk4ArzWGOQ4WLKR_y-bIn0dIhyTh4bVDy4rf2LTFqyPl_ZTCAH_ZUqXZuJhFn73MpxEaavwIHl-b8EDCpyk2vCUQnSykIMEaAbEPs0JBNaBpah-lPR0FFZIr2vZQxI4xpxButI98W2d9CtBQ",
"scope": "orders.read",
"token_type": "Bearer",
"expires_in": 599
}
------------------------------------------------------------------
== JOSE header
------------------------------------------------------------------
{
"alg": "RS256",
"kid": "24805c96-60f5-4902-a73b-7881bad5f9dc"
}
------------------------------------------------------------------
== Claims
------------------------------------------------------------------
{
"aud": "demo-service",
"exp": 1787539339,
"iat": 1787538739,
"iss": "http://localhost:9000",
"jti": "37a459f1-1f7e-49e9-9d26-5bf4239bc5e9",
"nbf": 1787538739,
"scope": [
"orders.read"
],
"sub": "demo-service"
}
------------------------------------------------------------------
== Wrong secret
------------------------------------------------------------------
$ curl -si -u demo-service:WRONG -d grant_type=client_credentials http://localhost:9000/oauth2/token
HTTP/1.1 401
{"error":"invalid_client"}
------------------------------------------------------------------
== A grant the client is not registered for
------------------------------------------------------------------
$ curl -si -u demo-service:service-secret -d grant_type=authorization_code -d code=x http://localhost:9000/oauth2/token
HTTP/1.1 400
{"error":"invalid_grant"}
------------------------------------------------------------------
== A scope the client is not registered for
------------------------------------------------------------------
$ curl -s -u demo-service:service-secret -d grant_type=client_credentials -d scope=orders.write http://localhost:9000/oauth2/token
{"error":"invalid_scope"}
------------------------------------------------------------------
== Calling the resource server with the token
------------------------------------------------------------------
GET /public -> 401
WWW-Authenticate: Bearer error="invalid_token", error_description="An error occurred while attempting to decode the Jwt: the required audience orders-api is missing", error_uri="https://tools.ietf.org/html/rfc6750#section-3.1", resource_metadata="http://localhost:8090/.well-known/oauth-protected-resource"
GET /api/orders -> 401
WWW-Authenticate: Bearer error="invalid_token", error_description="An error occurred while attempting to decode the Jwt: the required audience orders-api is missing", error_uri="https://tools.ietf.org/html/rfc6750#section-3.1", resource_metadata="http://localhost:8090/.well-known/oauth-protected-resource"
GET /api/admin -> 401
WWW-Authenticate: Bearer error="invalid_token", error_description="An error occurred while attempting to decode the Jwt: the required audience orders-api is missing", error_uri="https://tools.ietf.org/html/rfc6750#section-3.1", resource_metadata="http://localhost:8090/.well-known/oauth-protected-resource"