71 lines
2.9 KiB
Java
71 lines
2.9 KiB
Java
/*
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* Copyright 2020 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.security.oauth2.server.authorization.web;
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import org.springframework.security.core.Authentication;
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import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
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import org.springframework.security.oauth2.core.OAuth2Error;
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import org.springframework.security.oauth2.core.OAuth2ErrorCodes;
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import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
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import org.springframework.security.oauth2.core.endpoint.PkceParameterNames;
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import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientAuthenticationToken;
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import org.springframework.security.web.authentication.AuthenticationConverter;
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import org.springframework.util.MultiValueMap;
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import org.springframework.util.StringUtils;
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import javax.servlet.http.HttpServletRequest;
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import java.util.HashMap;
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/**
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* Attempts to extract the parameters from {@link HttpServletRequest}
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* used for authenticating public clients using Proof Key for Code Exchange (PKCE).
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*
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* @author Joe Grandja
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* @since 0.0.2
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* @see AuthenticationConverter
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* @see OAuth2ClientAuthenticationToken
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* @see OAuth2ClientAuthenticationFilter
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* @see <a target="_blank" href="https://tools.ietf.org/html/rfc7636">Proof Key for Code Exchange by OAuth Public Clients</a>
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*/
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public class PublicClientAuthenticationConverter implements AuthenticationConverter {
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@Override
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public Authentication convert(HttpServletRequest request) {
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if (!OAuth2EndpointUtils.matchesPkceTokenRequest(request)) {
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return null;
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}
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MultiValueMap<String, String> parameters = OAuth2EndpointUtils.getParameters(request);
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// client_id (REQUIRED for public clients)
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String clientId = parameters.getFirst(OAuth2ParameterNames.CLIENT_ID);
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if (!StringUtils.hasText(clientId) ||
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parameters.get(OAuth2ParameterNames.CLIENT_ID).size() != 1) {
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throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_REQUEST));
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}
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// code_verifier (REQUIRED)
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if (parameters.get(PkceParameterNames.CODE_VERIFIER).size() != 1) {
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throw new OAuth2AuthenticationException(new OAuth2Error(OAuth2ErrorCodes.INVALID_REQUEST));
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}
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parameters.remove(OAuth2ParameterNames.CLIENT_ID);
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return new OAuth2ClientAuthenticationToken(
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clientId, new HashMap<>(parameters.toSingleValueMap()));
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}
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}
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