Revert "Issuer should not support path component"

This reverts commit c3f86d11f86594b6dcff83cfa49bd10e574db8b3.

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/config/annotation/web/configurers/OAuth2AuthorizationServerConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2023 the original author or authors.
+ * Copyright 2020-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -48,7 +48,6 @@ import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
 import org.springframework.security.web.util.matcher.OrRequestMatcher;
 import org.springframework.security.web.util.matcher.RequestMatcher;
 import org.springframework.util.Assert;
-import org.springframework.util.StringUtils;
 
 /**
  * An {@link AbstractHttpConfigurer} for OAuth 2.0 Authorization Server support.
@@ -332,9 +331,6 @@ public final class OAuth2AuthorizationServerConfigurer
 			} catch (Exception ex) {
 				throw new IllegalArgumentException("issuer must be a valid URL", ex);
 			}
-			if (StringUtils.hasText(issuerUri.getPath())) {
-				throw new IllegalArgumentException("Path component for issuer ('" + issuerUri.getPath() + "') is currently not supported");
-			}
 			// rfc8414 https://datatracker.ietf.org/doc/html/rfc8414#section-2
 			if (issuerUri.getQuery() != null || issuerUri.getFragment() != null) {
 				throw new IllegalArgumentException("issuer cannot contain query or fragment component");

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/config/annotation/web/configurers/OidcProviderConfigurationTests.java

@@ -161,13 +161,6 @@ public class OidcProviderConfigurationTests {
 		);
 	}
 
-	@Test
-	public void loadContextWhenIssuerWithPathThenThrowException() {
-		assertThatThrownBy(
-				() -> this.spring.register(AuthorizationServerConfigurationWithIssuerPath.class).autowire()
-		);
-	}
-
 	@Test
 	public void loadContextWhenIssuerWithQueryThenThrowException() {
 		assertThatThrownBy(
@@ -189,13 +182,6 @@ public class OidcProviderConfigurationTests {
 		);
 	}
 
-	@Test
-	public void loadContextWhenIssuerWithEmptyPathThenThrowException() {
-		assertThatThrownBy(
-				() -> this.spring.register(AuthorizationServerConfigurationWithIssuerEmptyPath.class).autowire()
-		);
-	}
-
 	@Test
 	public void loadContextWhenIssuerWithEmptyQueryThenThrowException() {
 		assertThatThrownBy(
@@ -313,15 +299,6 @@ public class OidcProviderConfigurationTests {
 		}
 	}
 
-	@EnableWebSecurity
-	static class AuthorizationServerConfigurationWithIssuerPath extends AuthorizationServerConfiguration {
-
-		@Bean
-		AuthorizationServerSettings authorizationServerSettings() {
-			return AuthorizationServerSettings.builder().issuer(ISSUER_URL + "/issuer1").build();
-		}
-	}
-
 	@EnableWebSecurity
 	static class AuthorizationServerConfigurationWithIssuerQuery extends AuthorizationServerConfiguration {
 
@@ -349,15 +326,6 @@ public class OidcProviderConfigurationTests {
 		}
 	}
 
-	@EnableWebSecurity
-	static class AuthorizationServerConfigurationWithIssuerEmptyPath extends AuthorizationServerConfiguration {
-
-		@Bean
-		AuthorizationServerSettings authorizationServerSettings() {
-			return AuthorizationServerSettings.builder().issuer(ISSUER_URL + "/").build();
-		}
-	}
-
 	@EnableWebSecurity
 	static class AuthorizationServerConfigurationWithIssuerEmptyQuery extends AuthorizationServerConfiguration {