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fix: Evaluate the redirect_uri at each step of the auth flow
fixes AM-722
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93 changes: 93 additions & 0 deletions
93
...avitee/am/gateway/handler/root/resources/handler/common/RedirectUriValidationHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| /** | ||
| * Copyright (C) 2015 The Gravitee team (http://gravitee.io) | ||
| * | ||
| * 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 | ||
| * | ||
| * http://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 io.gravitee.am.gateway.handler.root.resources.handler.common; | ||
|
|
||
| import io.gravitee.am.common.exception.oauth2.InvalidRequestException; | ||
| import io.gravitee.am.common.exception.oauth2.RedirectMismatchException; | ||
| import io.gravitee.am.common.utils.ConstantKeys; | ||
| import io.gravitee.am.model.Domain; | ||
| import io.gravitee.am.model.oidc.Client; | ||
| import io.vertx.core.Handler; | ||
| import io.vertx.reactivex.ext.web.RoutingContext; | ||
|
|
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| import java.util.List; | ||
|
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| import static io.gravitee.am.gateway.handler.root.resources.endpoint.ParamUtils.getOAuthParameter; | ||
| import static io.gravitee.am.gateway.handler.root.resources.endpoint.ParamUtils.redirectMatches; | ||
|
|
||
| /** | ||
| * The authorization server validates the request to ensure that all parameters are valid. | ||
| * If the request is valid, the authorization server authenticates the resource owner and obtains | ||
| * an authorization decision (by asking the resource owner or by establishing approval via other means). | ||
| * | ||
| * See <a href="https://tools.ietf.org/html/rfc6749#section-4.1.1">4.1.1. Authorization Request</a> | ||
| * | ||
| * This specific handler is checking the validity of the redirect_uri | ||
| * | ||
| * @author Eric LELEU (eric.leleu at graviteesource.com) | ||
| * @author GraviteeSource Team | ||
| */ | ||
| public class RedirectUriValidationHandler implements Handler<RoutingContext> { | ||
|
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| private final Domain domain; | ||
|
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| public RedirectUriValidationHandler(Domain domain) { | ||
| this.domain = domain; | ||
| } | ||
|
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| @Override | ||
| public void handle(RoutingContext context) { | ||
| final Client client = context.get(ConstantKeys.CLIENT_CONTEXT_KEY); | ||
|
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| // proceed redirect_uri parameter | ||
| parseRedirectUriParameter(context, client); | ||
|
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| context.next(); | ||
| } | ||
|
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| private void parseRedirectUriParameter(RoutingContext context, Client client) { | ||
| String requestedRedirectUri = getOAuthParameter(context, io.gravitee.am.common.oauth2.Parameters.REDIRECT_URI); | ||
| final List<String> registeredClientRedirectUris = client.getRedirectUris(); | ||
| final boolean hasRegisteredClientRedirectUris = registeredClientRedirectUris != null && !registeredClientRedirectUris.isEmpty(); | ||
| final boolean hasRequestedRedirectUri = requestedRedirectUri != null && !requestedRedirectUri.isEmpty(); | ||
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| // if no requested redirect_uri and no registered client redirect_uris | ||
| // throw invalid request exception | ||
| if (!hasRegisteredClientRedirectUris && !hasRequestedRedirectUri) { | ||
| throw new InvalidRequestException("A redirect_uri must be supplied"); | ||
| } | ||
|
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| // if no requested redirect_uri and more than one registered client redirect_uris | ||
| // throw invalid request exception | ||
| if (!hasRequestedRedirectUri && (registeredClientRedirectUris != null && registeredClientRedirectUris.size() > 1)) { | ||
| throw new InvalidRequestException("Unable to find suitable redirect_uri, a redirect_uri must be supplied"); | ||
| } | ||
|
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| // if requested redirect_uri doesn't match registered client redirect_uris | ||
| // throw redirect mismatch exception | ||
| if (hasRequestedRedirectUri && hasRegisteredClientRedirectUris) { | ||
| checkMatchingRedirectUri(requestedRedirectUri, registeredClientRedirectUris); | ||
| } | ||
| } | ||
|
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| private void checkMatchingRedirectUri(String requestedRedirect, List<String> registeredClientRedirectUris) { | ||
| if (registeredClientRedirectUris | ||
| .stream() | ||
| .noneMatch(registeredClientUri -> redirectMatches(requestedRedirect, registeredClientUri, this.domain.isRedirectUriStrictMatching() || this.domain.usePlainFapiProfile()))) { | ||
| throw new RedirectMismatchException(String.format("The redirect_uri [ %s ] MUST match the registered callback URL for this application", requestedRedirect)); | ||
| } | ||
| } | ||
| } |
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