/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions copyright [year] [name of copyright owner]".
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*
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* Copyright 2013 ForgeRock AS.
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*/
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package org.forgerock.opendj.rest2ldap;
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import static org.forgerock.opendj.rest2ldap.Utils.i18n;
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import static org.forgerock.opendj.rest2ldap.Utils.isJSONPrimitive;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import org.forgerock.json.resource.ForbiddenException;
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import org.forgerock.json.resource.ResourceException;
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import org.forgerock.opendj.ldap.DN;
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import org.forgerock.opendj.ldap.schema.Schema;
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/**
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* An authorization ID template used for mapping security context principals to
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* AuthzID templates of the form
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* <code>dn:uid={uid},ou={realm},dc=example,dc=com</code>, or
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* <code>u:{uid}@{realm}.example.com</code>.
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*/
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final class AuthzIdTemplate {
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private static interface Impl {
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String formatAsAuthzId(AuthzIdTemplate t, Object[] templateVariables, Schema schema)
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throws ResourceException;
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}
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private static final Impl DN_IMPL = new Impl() {
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@Override
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public String formatAsAuthzId(final AuthzIdTemplate t, final Object[] templateVariables,
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final Schema schema) throws ResourceException {
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final String authzId = String.format(Locale.ENGLISH, t.formatString, templateVariables);
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try {
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// Validate the DN.
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DN.valueOf(authzId.substring(3), schema);
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} catch (final IllegalArgumentException e) {
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throw new ForbiddenException(
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i18n("The request could not be authorized because the required "
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+ "security principal was not a valid LDAP DN"));
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}
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return authzId;
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}
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};
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private static final Pattern DN_PATTERN = Pattern.compile("^dn:\\{[^}]+\\}$");
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private static final Impl DN_TEMPLATE_IMPL = new Impl() {
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@Override
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public String formatAsAuthzId(final AuthzIdTemplate t, final Object[] templateVariables,
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final Schema schema) throws ResourceException {
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return "dn:" + DN.format(t.dnFormatString, schema, templateVariables);
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}
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};
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private static final Pattern KEY_RE = Pattern.compile("\\{([^}]+)\\}");
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private static final Impl UID_TEMPLATE_IMPL = new Impl() {
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@Override
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public String formatAsAuthzId(final AuthzIdTemplate t, final Object[] templateVariables,
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final Schema schema) throws ResourceException {
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return String.format(Locale.ENGLISH, t.formatString, templateVariables);
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}
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};
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private final String dnFormatString;
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private final String formatString;
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private final List<String> keys = new ArrayList<String>();
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private final Impl pimpl;
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private final String template;
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AuthzIdTemplate(final String template) {
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if (!template.startsWith("u:") && !template.startsWith("dn:")) {
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throw new IllegalArgumentException("Invalid authorization ID template: " + template);
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}
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// Parse the template keys and replace them with %s for formatting.
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final Matcher matcher = KEY_RE.matcher(template);
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final StringBuffer buffer = new StringBuffer(template.length());
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while (matcher.find()) {
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matcher.appendReplacement(buffer, "%s");
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keys.add(matcher.group(1));
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}
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matcher.appendTail(buffer);
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this.formatString = buffer.toString();
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this.template = template;
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if (template.startsWith("dn:")) {
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this.pimpl = DN_PATTERN.matcher(template).matches() ? DN_IMPL : DN_TEMPLATE_IMPL;
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this.dnFormatString = formatString.substring(3);
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} else {
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this.pimpl = UID_TEMPLATE_IMPL;
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this.dnFormatString = null;
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}
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}
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@Override
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public String toString() {
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return template;
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}
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String formatAsAuthzId(final Map<String, Object> principals, final Schema schema)
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throws ResourceException {
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final String[] templateVariables = getPrincipalsForFormatting(principals);
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return pimpl.formatAsAuthzId(this, templateVariables, schema);
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}
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private String[] getPrincipalsForFormatting(final Map<String, Object> principals)
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throws ForbiddenException {
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final String[] values = new String[keys.size()];
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for (int i = 0; i < values.length; i++) {
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final String key = keys.get(i);
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final Object value = principals.get(key);
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if (isJSONPrimitive(value)) {
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values[i] = String.valueOf(value);
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} else if (value == null) {
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throw new ForbiddenException(i18n(
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"The request could not be authorized because the required "
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+ "security principal '%s' could not be determined", key));
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} else {
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throw new ForbiddenException(i18n(
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"The request could not be authorized because the required "
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+ "security principal '%s' had an invalid data type", key));
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}
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}
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return values;
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}
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}
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