48 lines
1.6 KiB
Java
48 lines
1.6 KiB
Java
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/*
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* Copyright 2018 Red Hat, Inc. and/or its affiliates
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* and other contributors as indicated by the @author tags.
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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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* http://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.keycloak.theme;
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import freemarker.template.TemplateMethodModelEx;
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import freemarker.template.TemplateModelException;
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import java.util.List;
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import org.owasp.html.PolicyFactory;
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/**
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* Allows sanitizing of html that uses Freemarker ?no_esc. This way, html
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* can be allowed but it is still cleaned up for safety. Tags and attributes
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* deemed unsafe will be stripped out.
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*/
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public class KeycloakSanitizerMethod implements TemplateMethodModelEx {
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private static final PolicyFactory KEYCLOAK_POLICY = KeycloakSanitizerPolicy.POLICY_DEFINITION;
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@Override
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public Object exec(List list) throws TemplateModelException {
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if ((list.isEmpty()) || (list.get(0) == null)) {
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throw new NullPointerException("Can not escape null value.");
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}
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String html = list.get(0).toString();
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String sanitized = KEYCLOAK_POLICY.sanitize(html);
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return sanitized;
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}
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}
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