Provide in-memory implementation for OAuth2AuthorizationService

Fixes gh-43

Author: krisztian-toth

core/src/main/java/org/springframework/security/oauth2/server/authorization/InMemoryOAuth2AuthorizationService.java

@@ -0,0 +1,83 @@
+/*
+ * Copyright 2020 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.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.server.authorization;
+
+import org.springframework.util.Assert;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/**
+ * In-memory implementation of {@link OAuth2AuthorizationService}.
+ *
+ * @author Krisztian Toth
+ */
+public final class InMemoryOAuth2AuthorizationService implements OAuth2AuthorizationService {
+	private final List<OAuth2Authorization> authorizations;
+
+	/**
+	 * Creates an {@link InMemoryOAuth2AuthorizationService}.
+	 */
+	public InMemoryOAuth2AuthorizationService() {
+		this(Collections.emptyList());
+	}
+
+	/**
+	 * Creates an {@link InMemoryOAuth2AuthorizationService} with the provided {@link List}<{@link OAuth2Authorization}>
+	 * as the in-memory store.
+	 *
+	 * @param authorizations a {@link List}<{@link OAuth2Authorization}> object to use as the store
+	 */
+	public InMemoryOAuth2AuthorizationService(List<OAuth2Authorization> authorizations) {
+		Assert.notNull(authorizations, "authorizations cannot be null");
+		this.authorizations = new CopyOnWriteArrayList<>(authorizations);
+	}
+
+	@Override
+	public void save(OAuth2Authorization authorization) {
+		Assert.notNull(authorization, "authorization cannot be null");
+		this.authorizations.add(authorization);
+	}
+
+	@Override
+	public OAuth2Authorization findByTokenAndTokenType(String token, TokenType tokenType) {
+		Assert.hasText(token, "token cannot be empty");
+		Assert.notNull(tokenType, "tokenType cannot be null");
+		return this.authorizations.stream()
+				.filter(authorization -> doesMatch(authorization, token, tokenType))
+				.findFirst()
+				.orElse(null);
+
+	}
+
+	private boolean doesMatch(OAuth2Authorization authorization, String token, TokenType tokenType) {
+		if (tokenType.equals(TokenType.ACCESS_TOKEN)) {
+			return isAccessTokenEqual(token, authorization);
+		} else if (tokenType.equals(TokenType.AUTHORIZATION_CODE)) {
+			return isAuthorizationCodeEqual(token, authorization);
+		}
+		return false;
+	}
+
+	private boolean isAccessTokenEqual(String token, OAuth2Authorization authorization) {
+		return authorization.getAccessToken() != null && token.equals(authorization.getAccessToken().getTokenValue());
+	}
+
+	private boolean isAuthorizationCodeEqual(String token, OAuth2Authorization authorization) {
+		return token.equals(authorization.getAttributes().get(TokenType.AUTHORIZATION_CODE.getValue()));
+	}
+}

core/src/main/java/org/springframework/security/oauth2/server/authorization/OAuth2Authorization.java

@@ -16,16 +16,196 @@
 package org.springframework.security.oauth2.server.authorization;
 
 import org.springframework.security.oauth2.core.OAuth2AccessToken;
+import org.springframework.util.Assert;
 
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.Map;
+import java.util.Objects;
+import java.util.function.Consumer;
 
 /**
+ * Represents a collection of attributes which describe an OAuth 2.0 authorization context.
+ *
  * @author Joe Grandja
+ * @author Krisztian Toth
  */
 public class OAuth2Authorization {
 	private String registeredClientId;
 	private String principalName;
 	private OAuth2AccessToken accessToken;
 	private Map<String, Object> attributes;
 
+	protected OAuth2Authorization() {
+	}
+
+	public String getRegisteredClientId() {
+		return this.registeredClientId;
+	}
+
+	public String getPrincipalName() {
+		return this.principalName;
+	}
+
+	public OAuth2AccessToken getAccessToken() {
+		return this.accessToken;
+	}
+
+	public Map<String, Object> getAttributes() {
+		return this.attributes;
+	}
+
+	/**
+	 * Returns an attribute with the provided name or {@code null} if not found.
+	 *
+	 * @param name the name of the attribute
+	 * @param <T>  the type of the attribute
+	 * @return the found attribute or {@code null}
+	 */
+	public <T> T getAttribute(String name) {
+		Assert.hasText(name, "name cannot be empty");
+		return (T) this.attributes.get(name);
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) {
+			return true;
+		}
+		if (o == null || getClass() != o.getClass()) {
+			return false;
+		}
+		OAuth2Authorization that = (OAuth2Authorization) o;
+		return Objects.equals(this.registeredClientId, that.registeredClientId) &&
+				Objects.equals(this.principalName, that.principalName) &&
+				Objects.equals(this.accessToken, that.accessToken) &&
+				Objects.equals(this.attributes, that.attributes);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(this.registeredClientId, this.principalName, this.accessToken, this.attributes);
+	}
+
+	/**
+	 * Returns an empty {@link Builder}.
+	 *
+	 * @return the {@link Builder}
+	 */
+	public static Builder builder() {
+		return new Builder();
+	}
+
+	/**
+	 * Returns a new {@link Builder}, initialized with the provided {@link OAuth2Authorization}.
+	 *
+	 * @param authorization the {@link OAuth2Authorization} to copy from
+	 * @return the {@link Builder}
+	 */
+	public static Builder withAuthorization(OAuth2Authorization authorization) {
+		Assert.notNull(authorization, "authorization cannot be null");
+		return new Builder(authorization);
+	}
+
+	/**
+	 * Builder class for {@link OAuth2Authorization}.
+	 */
+	public static class Builder {
+		private String registeredClientId;
+		private String principalName;
+		private OAuth2AccessToken accessToken;
+		private Map<String, Object> attributes = new HashMap<>();
+
+		protected Builder() {
+		}
+
+		protected Builder(OAuth2Authorization authorization) {
+			this.registeredClientId = authorization.registeredClientId;
+			this.principalName = authorization.principalName;
+			this.accessToken = authorization.accessToken;
+			this.attributes = authorization.attributes;
+		}
+
+		/**
+		 * Sets the registered client identifier.
+		 *
+		 * @param registeredClientId the client id
+		 * @return the {@link Builder}
+		 */
+		public Builder registeredClientId(String registeredClientId) {
+			this.registeredClientId = registeredClientId;
+			return this;
+		}
+
+		/**
+		 * Sets the principal name.
+		 *
+		 * @param principalName the principal name
+		 * @return the {@link Builder}
+		 */
+		public Builder principalName(String principalName) {
+			this.principalName = principalName;
+			return this;
+		}
+
+		/**
+		 * Sets the {@link OAuth2AccessToken}.
+		 *
+		 * @param accessToken the {@link OAuth2AccessToken}
+		 * @return the {@link Builder}
+		 */
+		public Builder accessToken(OAuth2AccessToken accessToken) {
+			this.accessToken = accessToken;
+			return this;
+		}
+
+		/**
+		 * Adds the attribute with the specified name and {@link String} value to the attributes map.
+		 *
+		 * @param name  the name of the attribute
+		 * @param value the value of the attribute
+		 * @return the {@link Builder}
+		 */
+		public Builder attribute(String name, String value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.hasText(value, "value cannot be empty");
+			this.attributes.put(name, value);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the attributes map allowing to access or modify its content.
+		 *
+		 * @param attributesConsumer a {@link Consumer} of the attributes map
+		 * @return the {@link Builder}
+		 */
+		public Builder attributes(Consumer<Map<String, Object>> attributesConsumer) {
+			attributesConsumer.accept(this.attributes);
+			return this;
+		}
+
+		/**
+		 * Builds a new {@link OAuth2Authorization}.
+		 *
+		 * @return the {@link OAuth2Authorization}
+		 */
+		public OAuth2Authorization build() {
+			Assert.hasText(this.registeredClientId, "registeredClientId cannot be empty");
+			Assert.hasText(this.principalName, "principalName cannot be empty");
+			if (this.accessToken == null && this.attributes.get(TokenType.AUTHORIZATION_CODE.getValue()) == null) {
+				throw new IllegalArgumentException("either accessToken has to be set or the authorization code with key '"
+						+ TokenType.AUTHORIZATION_CODE.getValue() + "' must be provided in the attributes map");
+			}
+			return create();
+		}
+
+		private OAuth2Authorization create() {
+			OAuth2Authorization oAuth2Authorization = new OAuth2Authorization();
+			oAuth2Authorization.registeredClientId = this.registeredClientId;
+			oAuth2Authorization.principalName = this.principalName;
+			oAuth2Authorization.accessToken = this.accessToken;
+			oAuth2Authorization.attributes = Collections.unmodifiableMap(this.attributes);
+			return oAuth2Authorization;
+		}
+	}
 }