AuthzEndpointRequestObjectParser.java
/*
* Copyright 2016 Red Hat, Inc. and/or its affiliates
* and other contributors as indicated by the @author tags.
*
* 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 org.keycloak.protocol.oidc.endpoints.request;
import com.fasterxml.jackson.databind.JsonNode;
import java.util.HashSet;
import java.util.Set;
import java.util.function.BiConsumer;
import org.keycloak.OAuth2Constants;
import org.keycloak.jose.JOSEHeader;
import org.keycloak.jose.JOSE;
import org.keycloak.jose.jwe.JWE;
import org.keycloak.jose.jwe.JWEHeader;
import org.keycloak.jose.jws.JWSInput;
import org.keycloak.models.ClientModel;
import org.keycloak.models.KeycloakSession;
import org.keycloak.protocol.oidc.OIDCAdvancedConfigWrapper;
import org.keycloak.protocol.oidc.OIDCLoginProtocol;
/**
* Parse the parameters from OIDC "request" object
*
* @author <a href="mailto:mposolda@redhat.com">Marek Posolda</a>
*/
public class AuthzEndpointRequestObjectParser extends AuthzEndpointRequestParser {
private final JsonNode requestParams;
public AuthzEndpointRequestObjectParser(KeycloakSession session, String requestObject, ClientModel client) {
this.requestParams = session.tokens().decodeClientJWT(requestObject, client, createRequestObjectValidator(session), JsonNode.class);
if (this.requestParams == null) {
throw new RuntimeException("Failed to verify signature on 'request' object");
}
if (requestParams.has(OIDCLoginProtocol.REQUEST_URI_PARAM)) {
throw new RuntimeException("The request_uri claim should not be set in the request object");
}
session.setAttribute(AuthzEndpointRequestParser.AUTHZ_REQUEST_OBJECT, requestParams);
}
@Override
protected String getParameter(String paramName) {
JsonNode val = this.requestParams.get(paramName);
if (val == null) {
return null;
} else if (val.isValueNode()) {
return val.asText();
} else {
return val.toString();
}
}
@Override
protected Integer getIntParameter(String paramName) {
Object val = this.requestParams.get(paramName);
return val==null ? null : Integer.valueOf(getParameter(paramName));
}
@Override
protected Set<String> keySet() {
HashSet<String> keys = new HashSet<>();
requestParams.fieldNames().forEachRemaining(keys::add);
return keys;
}
private BiConsumer<JOSE, ClientModel> createRequestObjectValidator(KeycloakSession session) {
return (jwt, clientModel) -> {
if (jwt instanceof JWSInput) {
JOSEHeader header = jwt.getHeader();
String headerAlgorithm = header.getRawAlgorithm();
if (headerAlgorithm == null) {
throw new RuntimeException("Request object signed algorithm not specified");
}
String requestedSignatureAlgorithm = OIDCAdvancedConfigWrapper.fromClientModel(clientModel)
.getRequestObjectSignatureAlg();
if (requestedSignatureAlgorithm != null && !requestedSignatureAlgorithm.equals(headerAlgorithm)) {
throw new RuntimeException(
"Request object signed with different algorithm than client requested algorithm");
}
} else {
String encryptionAlg = OIDCAdvancedConfigWrapper.fromClientModel(clientModel).getRequestObjectEncryptionAlg();
if (encryptionAlg != null) {
if (!encryptionAlg.equals(jwt.getHeader().getRawAlgorithm())) {
throw new RuntimeException("Request object encrypted with different algorithm than client requested algorithm");
}
}
String encryptionEncAlg = OIDCAdvancedConfigWrapper.fromClientModel(clientModel).getRequestObjectEncryptionEnc();
if (encryptionEncAlg != null) {
JWE jwe = (JWE) jwt;
JWEHeader header = (JWEHeader) jwe.getHeader();
if (!encryptionEncAlg.equals(header.getEncryptionAlgorithm())) {
throw new RuntimeException("Request object content encrypted with different algorithm than client requested algorithm");
}
}
session.setAttribute(AuthzEndpointRequestParser.AUTHZ_REQUEST_OBJECT_ENCRYPTED, jwt);
}
};
}
}