操作指南：實作多租戶

import java.util.UUID;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.security.oauth2.core.AuthorizationGrantType;
import org.springframework.security.oauth2.core.ClientAuthenticationMethod;
import org.springframework.security.oauth2.server.authorization.client.JdbcRegisteredClientRepository;
import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
import org.springframework.util.Assert;

@Configuration(proxyBeanMethods = false)
public class RegisteredClientRepositoryConfig {

	@Bean
	public RegisteredClientRepository registeredClientRepository(
			@Qualifier("issuer1-data-source") DataSource issuer1DataSource,
			@Qualifier("issuer2-data-source") DataSource issuer2DataSource,
			TenantPerIssuerComponentRegistry componentRegistry) {

		JdbcRegisteredClientRepository issuer1RegisteredClientRepository =
				new JdbcRegisteredClientRepository(new JdbcTemplate(issuer1DataSource));	(1)

		issuer1RegisteredClientRepository.save(
				RegisteredClient.withId(UUID.randomUUID().toString())
						.clientId("client-1")
						.clientSecret("{noop}secret")
						.clientAuthenticationMethod(ClientAuthenticationMethod.CLIENT_SECRET_BASIC)
						.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
						.scope("scope-1")
						.build()
		);

		JdbcRegisteredClientRepository issuer2RegisteredClientRepository =
				new JdbcRegisteredClientRepository(new JdbcTemplate(issuer2DataSource));	(2)

		issuer2RegisteredClientRepository.save(
				RegisteredClient.withId(UUID.randomUUID().toString())
						.clientId("client-2")
						.clientSecret("{noop}secret")
						.clientAuthenticationMethod(ClientAuthenticationMethod.CLIENT_SECRET_BASIC)
						.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
						.scope("scope-2")
						.build()
		);

		componentRegistry.register("issuer1", RegisteredClientRepository.class, issuer1RegisteredClientRepository);
		componentRegistry.register("issuer2", RegisteredClientRepository.class, issuer2RegisteredClientRepository);

		return new DelegatingRegisteredClientRepository(componentRegistry);
	}

	private static class DelegatingRegisteredClientRepository implements RegisteredClientRepository {	(3)

		private final TenantPerIssuerComponentRegistry componentRegistry;

		private DelegatingRegisteredClientRepository(TenantPerIssuerComponentRegistry componentRegistry) {
			this.componentRegistry = componentRegistry;
		}

		@Override
		public void save(RegisteredClient registeredClient) {
			getRegisteredClientRepository().save(registeredClient);
		}

		@Override
		public RegisteredClient findById(String id) {
			return getRegisteredClientRepository().findById(id);
		}

		@Override
		public RegisteredClient findByClientId(String clientId) {
			return getRegisteredClientRepository().findByClientId(clientId);
		}

		private RegisteredClientRepository getRegisteredClientRepository() {
			RegisteredClientRepository registeredClientRepository =
					this.componentRegistry.get(RegisteredClientRepository.class);	(4)
			Assert.state(registeredClientRepository != null,
					"RegisteredClientRepository not found for \"requested\" issuer identifier.");	(5)
			return registeredClientRepository;
		}

	}

}

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabase;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;

@Configuration(proxyBeanMethods = false)
public class DataSourceConfig {

	@Bean("issuer1-data-source")
	public EmbeddedDatabase issuer1DataSource() {
		return new EmbeddedDatabaseBuilder()
				.setName("issuer1-db")	(1)
				.setType(EmbeddedDatabaseType.H2)
				.setScriptEncoding("UTF-8")
				.addScript("org/springframework/security/oauth2/server/authorization/oauth2-authorization-schema.sql")
				.addScript("org/springframework/security/oauth2/server/authorization/oauth2-authorization-consent-schema.sql")
				.addScript("org/springframework/security/oauth2/server/authorization/client/oauth2-registered-client-schema.sql")
				.build();
	}

	@Bean("issuer2-data-source")
	public EmbeddedDatabase issuer2DataSource() {
		return new EmbeddedDatabaseBuilder()
				.setName("issuer2-db")	(2)
				.setType(EmbeddedDatabaseType.H2)
				.setScriptEncoding("UTF-8")
				.addScript("org/springframework/security/oauth2/server/authorization/oauth2-authorization-schema.sql")
				.addScript("org/springframework/security/oauth2/server/authorization/oauth2-authorization-consent-schema.sql")
				.addScript("org/springframework/security/oauth2/server/authorization/client/oauth2-registered-client-schema.sql")
				.build();
	}

}

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.security.oauth2.server.authorization.JdbcOAuth2AuthorizationService;
import org.springframework.security.oauth2.server.authorization.OAuth2Authorization;
import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
import org.springframework.security.oauth2.server.authorization.OAuth2TokenType;
import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
import org.springframework.util.Assert;

@Configuration(proxyBeanMethods = false)
public class OAuth2AuthorizationServiceConfig {

	@Bean
	public OAuth2AuthorizationService authorizationService(
			@Qualifier("issuer1-data-source") DataSource issuer1DataSource,
			@Qualifier("issuer2-data-source") DataSource issuer2DataSource,
			TenantPerIssuerComponentRegistry componentRegistry,
			RegisteredClientRepository registeredClientRepository) {

		componentRegistry.register("issuer1", OAuth2AuthorizationService.class,
				new JdbcOAuth2AuthorizationService(	(1)
						new JdbcTemplate(issuer1DataSource), registeredClientRepository));
		componentRegistry.register("issuer2", OAuth2AuthorizationService.class,
				new JdbcOAuth2AuthorizationService(	(2)
						new JdbcTemplate(issuer2DataSource), registeredClientRepository));

		return new DelegatingOAuth2AuthorizationService(componentRegistry);
	}

	private static class DelegatingOAuth2AuthorizationService implements OAuth2AuthorizationService {	(3)

		private final TenantPerIssuerComponentRegistry componentRegistry;

		private DelegatingOAuth2AuthorizationService(TenantPerIssuerComponentRegistry componentRegistry) {
			this.componentRegistry = componentRegistry;
		}

		@Override
		public void save(OAuth2Authorization authorization) {
			getAuthorizationService().save(authorization);
		}

		@Override
		public void remove(OAuth2Authorization authorization) {
			getAuthorizationService().remove(authorization);
		}

		@Override
		public OAuth2Authorization findById(String id) {
			return getAuthorizationService().findById(id);
		}

		@Override
		public OAuth2Authorization findByToken(String token, OAuth2TokenType tokenType) {
			return getAuthorizationService().findByToken(token, tokenType);
		}

		private OAuth2AuthorizationService getAuthorizationService() {
			OAuth2AuthorizationService authorizationService =
					this.componentRegistry.get(OAuth2AuthorizationService.class);	(4)
			Assert.state(authorizationService != null,
					"OAuth2AuthorizationService not found for \"requested\" issuer identifier.");	(5)
			return authorizationService;
		}

	}

}

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.security.oauth2.server.authorization.JdbcOAuth2AuthorizationConsentService;
import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationConsent;
import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationConsentService;
import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
import org.springframework.util.Assert;

@Configuration(proxyBeanMethods = false)
public class OAuth2AuthorizationConsentServiceConfig {

	@Bean
	public OAuth2AuthorizationConsentService authorizationConsentService(
			@Qualifier("issuer1-data-source") DataSource issuer1DataSource,
			@Qualifier("issuer2-data-source") DataSource issuer2DataSource,
			TenantPerIssuerComponentRegistry componentRegistry,
			RegisteredClientRepository registeredClientRepository) {

		componentRegistry.register("issuer1", OAuth2AuthorizationConsentService.class,
				new JdbcOAuth2AuthorizationConsentService(	(1)
						new JdbcTemplate(issuer1DataSource), registeredClientRepository));
		componentRegistry.register("issuer2", OAuth2AuthorizationConsentService.class,
				new JdbcOAuth2AuthorizationConsentService(	(2)
						new JdbcTemplate(issuer2DataSource), registeredClientRepository));

		return new DelegatingOAuth2AuthorizationConsentService(componentRegistry);
	}

	private static class DelegatingOAuth2AuthorizationConsentService implements OAuth2AuthorizationConsentService {	(3)

		private final TenantPerIssuerComponentRegistry componentRegistry;

		private DelegatingOAuth2AuthorizationConsentService(TenantPerIssuerComponentRegistry componentRegistry) {
			this.componentRegistry = componentRegistry;
		}

		@Override
		public void save(OAuth2AuthorizationConsent authorizationConsent) {
			getAuthorizationConsentService().save(authorizationConsent);
		}

		@Override
		public void remove(OAuth2AuthorizationConsent authorizationConsent) {
			getAuthorizationConsentService().remove(authorizationConsent);
		}

		@Override
		public OAuth2AuthorizationConsent findById(String registeredClientId, String principalName) {
			return getAuthorizationConsentService().findById(registeredClientId, principalName);
		}

		private OAuth2AuthorizationConsentService getAuthorizationConsentService() {
			OAuth2AuthorizationConsentService authorizationConsentService =
					this.componentRegistry.get(OAuth2AuthorizationConsentService.class);	(4)
			Assert.state(authorizationConsentService != null,
					"OAuth2AuthorizationConsentService not found for \"requested\" issuer identifier.");	(5)
			return authorizationConsentService;
		}

	}

}

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.util.List;
import java.util.UUID;

import com.nimbusds.jose.KeySourceException;
import com.nimbusds.jose.jwk.JWK;
import com.nimbusds.jose.jwk.JWKSelector;
import com.nimbusds.jose.jwk.JWKSet;
import com.nimbusds.jose.jwk.RSAKey;
import com.nimbusds.jose.jwk.source.JWKSource;
import com.nimbusds.jose.proc.SecurityContext;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.util.Assert;

@Configuration(proxyBeanMethods = false)
public class JWKSourceConfig {

	@Bean
	public JWKSource<SecurityContext> jwkSource(TenantPerIssuerComponentRegistry componentRegistry) {
		componentRegistry.register("issuer1", JWKSet.class, new JWKSet(generateRSAJwk()));	(1)
		componentRegistry.register("issuer2", JWKSet.class, new JWKSet(generateRSAJwk()));	(2)

		return new DelegatingJWKSource(componentRegistry);
	}

	private static RSAKey generateRSAJwk() {
		KeyPair keyPair;
		try {
			KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
			keyPairGenerator.initialize(2048);
			keyPair = keyPairGenerator.generateKeyPair();
		} catch (Exception ex) {
			throw new IllegalStateException(ex);
		}

		RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
		RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
		return new RSAKey.Builder(publicKey)
				.privateKey(privateKey)
				.keyID(UUID.randomUUID().toString())
				.build();
	}

	private static class DelegatingJWKSource implements JWKSource<SecurityContext> {	(3)

		private final TenantPerIssuerComponentRegistry componentRegistry;

		private DelegatingJWKSource(TenantPerIssuerComponentRegistry componentRegistry) {
			this.componentRegistry = componentRegistry;
		}

		@Override
		public List<JWK> get(JWKSelector jwkSelector, SecurityContext context) throws KeySourceException {
			return jwkSelector.select(getJwkSet());
		}

		private JWKSet getJwkSet() {
			JWKSet jwkSet = this.componentRegistry.get(JWKSet.class);	(4)
			Assert.state(jwkSet != null, "JWKSet not found for \"requested\" issuer identifier.");	(5)
			return jwkSet;
		}

	}

}