12f4001c9d
Closes gh-196
103 lines
3.7 KiB
Java
103 lines
3.7 KiB
Java
/*
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* Copyright 2020-2021 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 java.io.IOException;
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import java.io.Writer;
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import javax.servlet.FilterChain;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import com.nimbusds.jose.jwk.JWKMatcher;
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import com.nimbusds.jose.jwk.JWKSelector;
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import com.nimbusds.jose.jwk.JWKSet;
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import com.nimbusds.jose.jwk.source.JWKSource;
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import com.nimbusds.jose.proc.SecurityContext;
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import org.springframework.http.HttpMethod;
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import org.springframework.http.MediaType;
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import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
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import org.springframework.security.web.util.matcher.RequestMatcher;
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import org.springframework.util.Assert;
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import org.springframework.web.filter.OncePerRequestFilter;
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/**
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* A {@code Filter} that processes JWK Set requests.
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*
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* @author Joe Grandja
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* @since 0.0.1
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* @see com.nimbusds.jose.jwk.source.JWKSource
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* @see <a target="_blank" href="https://tools.ietf.org/html/rfc7517">JSON Web Key (JWK)</a>
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* @see <a target="_blank" href="https://tools.ietf.org/html/rfc7517#section-5">Section 5 JWK Set Format</a>
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*/
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public class NimbusJwkSetEndpointFilter extends OncePerRequestFilter {
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/**
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* The default endpoint {@code URI} for JWK Set requests.
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*/
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public static final String DEFAULT_JWK_SET_ENDPOINT_URI = "/oauth2/jwks";
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private final JWKSource<SecurityContext> jwkSource;
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private final JWKSelector jwkSelector;
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private final RequestMatcher requestMatcher;
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/**
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* Constructs a {@code NimbusJwkSetEndpointFilter} using the provided parameters.
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* @param jwkSource the {@code com.nimbusds.jose.jwk.source.JWKSource}
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*/
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public NimbusJwkSetEndpointFilter(JWKSource<SecurityContext> jwkSource) {
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this(jwkSource, DEFAULT_JWK_SET_ENDPOINT_URI);
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}
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/**
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* Constructs a {@code NimbusJwkSetEndpointFilter} using the provided parameters.
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*
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* @param jwkSource the {@code com.nimbusds.jose.jwk.source.JWKSource}
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* @param jwkSetEndpointUri the endpoint {@code URI} for JWK Set requests
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*/
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public NimbusJwkSetEndpointFilter(JWKSource<SecurityContext> jwkSource, String jwkSetEndpointUri) {
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Assert.notNull(jwkSource, "jwkSource cannot be null");
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Assert.hasText(jwkSetEndpointUri, "jwkSetEndpointUri cannot be empty");
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this.jwkSource = jwkSource;
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this.jwkSelector = new JWKSelector(new JWKMatcher.Builder().publicOnly(true).build());
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this.requestMatcher = new AntPathRequestMatcher(jwkSetEndpointUri, HttpMethod.GET.name());
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}
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@Override
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protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
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throws ServletException, IOException {
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if (!this.requestMatcher.matches(request)) {
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filterChain.doFilter(request, response);
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return;
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}
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JWKSet jwkSet;
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try {
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jwkSet = new JWKSet(this.jwkSource.get(this.jwkSelector, null));
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}
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catch (Exception ex) {
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throw new IllegalStateException("Failed to select the JWK public key(s) -> " + ex.getMessage(), ex);
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}
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response.setContentType(MediaType.APPLICATION_JSON_VALUE);
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try (Writer writer = response.getWriter()) {
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writer.write(jwkSet.toString());
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}
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}
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}
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