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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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15
authorization-server/tools/ClientPkceDefault.java Normal file
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@@ -0,0 +1,15 @@
import org.springframework.security.oauth2.client.registration.ClientRegistration;
/**
* Prints whether a Spring OAuth2 <i>client</i> registration requires PKCE out of the box.
* Run against spring-security-oauth2-client 6.5.1 and 7.1.1, it shows the default flipping
* in the same release that flipped it on the authorization server.
*/
public class ClientPkceDefault {
public static void main(String[] args) {
ClientRegistration.ClientSettings cs =
ClientRegistration.ClientSettings.builder().build();
System.out.println("ClientRegistration.ClientSettings.requireProofKey = "
+ cs.isRequireProofKey());
}
}

20
authorization-server/tools/SettingsDefaults.java Normal file
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@@ -0,0 +1,20 @@
import org.springframework.security.oauth2.server.authorization.settings.ClientSettings;
import org.springframework.security.oauth2.server.authorization.settings.TokenSettings;
/**
* Prints the out-of-the-box values of ClientSettings and TokenSettings. Run against two
* different Spring Authorization Server jars, it is the shortest proof that a default
* changed. scripts/settings-defaults.sh does exactly that for 1.5.8 and 7.1.1.
*/
public class SettingsDefaults {
public static void main(String[] a) {
ClientSettings cs = ClientSettings.builder().build();
TokenSettings ts = TokenSettings.builder().build();
System.out.println("requireProofKey = " + cs.isRequireProofKey());
System.out.println("requireAuthorizationConsent= " + cs.isRequireAuthorizationConsent());
System.out.println("accessTokenTimeToLive = " + ts.getAccessTokenTimeToLive());
System.out.println("accessTokenFormat = " + ts.getAccessTokenFormat().getValue());
System.out.println("refreshTokenTimeToLive = " + ts.getRefreshTokenTimeToLive());
System.out.println("reuseRefreshTokens = " + ts.isReuseRefreshTokens());
System.out.println("authorizationCodeTTL = " + ts.getAuthorizationCodeTimeToLive());
}
}