Follow-up to HADOOP-7119 - removing two files which were moved.
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1159806 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Aaron Myers
parent
a0f120ce68
commit
b77bc477b5
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@ -1,408 +0,0 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. 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.apache.hadoop.security;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import org.apache.hadoop.classification.InterfaceAudience;
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import org.apache.hadoop.classification.InterfaceStability;
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import org.apache.hadoop.conf.Configuration;
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import sun.security.krb5.Config;
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import sun.security.krb5.KrbException;
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/**
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* This class implements parsing and handling of Kerberos principal names. In
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* particular, it splits them apart and translates them down into local
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* operating system names.
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*/
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@SuppressWarnings("all")
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@InterfaceAudience.LimitedPrivate({"HDFS", "MapReduce"})
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@InterfaceStability.Evolving
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public class KerberosName {
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/** The first component of the name */
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private final String serviceName;
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/** The second component of the name. It may be null. */
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private final String hostName;
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/** The realm of the name. */
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private final String realm;
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/**
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* A pattern that matches a Kerberos name with at most 2 components.
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*/
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private static final Pattern nameParser =
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Pattern.compile("([^/@]*)(/([^/@]*))?@([^/@]*)");
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/**
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* A pattern that matches a string with out '$' and then a single
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* parameter with $n.
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*/
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private static Pattern parameterPattern =
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Pattern.compile("([^$]*)(\\$(\\d*))?");
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/**
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* A pattern for parsing a auth_to_local rule.
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*/
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private static final Pattern ruleParser =
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Pattern.compile("\\s*((DEFAULT)|(RULE:\\[(\\d*):([^\\]]*)](\\(([^)]*)\\))?"+
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"(s/([^/]*)/([^/]*)/(g)?)?))");
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/**
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* A pattern that recognizes simple/non-simple names.
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*/
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private static final Pattern nonSimplePattern = Pattern.compile("[/@]");
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/**
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* The list of translation rules.
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*/
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private static List<Rule> rules;
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private static String defaultRealm;
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private static Config kerbConf;
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static {
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try {
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kerbConf = Config.getInstance();
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defaultRealm = kerbConf.getDefaultRealm();
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} catch (KrbException ke) {
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if(UserGroupInformation.isSecurityEnabled())
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throw new IllegalArgumentException("Can't get Kerberos configuration",ke);
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else
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defaultRealm="";
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}
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}
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/**
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* Create a name from the full Kerberos principal name.
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* @param name
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*/
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public KerberosName(String name) {
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Matcher match = nameParser.matcher(name);
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if (!match.matches()) {
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if (name.contains("@")) {
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throw new IllegalArgumentException("Malformed Kerberos name: " + name);
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} else {
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serviceName = name;
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hostName = null;
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realm = null;
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}
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} else {
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serviceName = match.group(1);
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hostName = match.group(3);
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realm = match.group(4);
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}
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}
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/**
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* Get the configured default realm.
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* @return the default realm from the krb5.conf
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*/
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public String getDefaultRealm() {
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return defaultRealm;
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}
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/**
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* Put the name back together from the parts.
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*/
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@Override
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public String toString() {
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StringBuilder result = new StringBuilder();
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result.append(serviceName);
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if (hostName != null) {
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result.append('/');
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result.append(hostName);
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}
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if (realm != null) {
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result.append('@');
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result.append(realm);
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}
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return result.toString();
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}
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/**
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* Get the first component of the name.
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* @return the first section of the Kerberos principal name
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*/
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public String getServiceName() {
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return serviceName;
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}
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/**
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* Get the second component of the name.
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* @return the second section of the Kerberos principal name, and may be null
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*/
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public String getHostName() {
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return hostName;
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}
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/**
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* Get the realm of the name.
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* @return the realm of the name, may be null
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*/
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public String getRealm() {
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return realm;
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}
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/**
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* An encoding of a rule for translating kerberos names.
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*/
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private static class Rule {
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private final boolean isDefault;
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private final int numOfComponents;
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private final String format;
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private final Pattern match;
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private final Pattern fromPattern;
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private final String toPattern;
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private final boolean repeat;
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Rule() {
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isDefault = true;
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numOfComponents = 0;
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format = null;
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match = null;
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fromPattern = null;
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toPattern = null;
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repeat = false;
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}
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Rule(int numOfComponents, String format, String match, String fromPattern,
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String toPattern, boolean repeat) {
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isDefault = false;
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this.numOfComponents = numOfComponents;
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this.format = format;
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this.match = match == null ? null : Pattern.compile(match);
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this.fromPattern =
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fromPattern == null ? null : Pattern.compile(fromPattern);
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this.toPattern = toPattern;
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this.repeat = repeat;
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}
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@Override
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public String toString() {
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StringBuilder buf = new StringBuilder();
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if (isDefault) {
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buf.append("DEFAULT");
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} else {
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buf.append("RULE:[");
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buf.append(numOfComponents);
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buf.append(':');
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buf.append(format);
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buf.append(']');
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if (match != null) {
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buf.append('(');
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buf.append(match);
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buf.append(')');
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}
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if (fromPattern != null) {
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buf.append("s/");
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buf.append(fromPattern);
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buf.append('/');
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buf.append(toPattern);
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buf.append('/');
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if (repeat) {
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buf.append('g');
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}
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}
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}
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return buf.toString();
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}
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/**
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* Replace the numbered parameters of the form $n where n is from 1 to
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* the length of params. Normal text is copied directly and $n is replaced
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* by the corresponding parameter.
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* @param format the string to replace parameters again
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* @param params the list of parameters
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* @return the generated string with the parameter references replaced.
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* @throws BadFormatString
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*/
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static String replaceParameters(String format,
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String[] params) throws BadFormatString {
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Matcher match = parameterPattern.matcher(format);
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int start = 0;
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StringBuilder result = new StringBuilder();
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while (start < format.length() && match.find(start)) {
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result.append(match.group(1));
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String paramNum = match.group(3);
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if (paramNum != null) {
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try {
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int num = Integer.parseInt(paramNum);
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if (num < 0 || num > params.length) {
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throw new BadFormatString("index " + num + " from " + format +
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" is outside of the valid range 0 to " +
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(params.length - 1));
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}
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result.append(params[num]);
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} catch (NumberFormatException nfe) {
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throw new BadFormatString("bad format in username mapping in " +
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paramNum, nfe);
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}
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}
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start = match.end();
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}
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return result.toString();
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}
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/**
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* Replace the matches of the from pattern in the base string with the value
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* of the to string.
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* @param base the string to transform
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* @param from the pattern to look for in the base string
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* @param to the string to replace matches of the pattern with
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* @param repeat whether the substitution should be repeated
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* @return
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*/
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static String replaceSubstitution(String base, Pattern from, String to,
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boolean repeat) {
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Matcher match = from.matcher(base);
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if (repeat) {
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return match.replaceAll(to);
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} else {
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return match.replaceFirst(to);
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}
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}
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/**
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* Try to apply this rule to the given name represented as a parameter
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* array.
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* @param params first element is the realm, second and later elements are
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* are the components of the name "a/b@FOO" -> {"FOO", "a", "b"}
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* @return the short name if this rule applies or null
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* @throws IOException throws if something is wrong with the rules
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*/
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String apply(String[] params) throws IOException {
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String result = null;
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if (isDefault) {
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if (defaultRealm.equals(params[0])) {
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result = params[1];
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}
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} else if (params.length - 1 == numOfComponents) {
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String base = replaceParameters(format, params);
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if (match == null || match.matcher(base).matches()) {
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if (fromPattern == null) {
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result = base;
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} else {
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result = replaceSubstitution(base, fromPattern, toPattern, repeat);
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}
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}
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}
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if (result != null && nonSimplePattern.matcher(result).find()) {
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throw new NoMatchingRule("Non-simple name " + result +
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" after auth_to_local rule " + this);
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}
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return result;
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}
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}
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static List<Rule> parseRules(String rules) {
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List<Rule> result = new ArrayList<Rule>();
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String remaining = rules.trim();
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while (remaining.length() > 0) {
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Matcher matcher = ruleParser.matcher(remaining);
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if (!matcher.lookingAt()) {
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throw new IllegalArgumentException("Invalid rule: " + remaining);
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}
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if (matcher.group(2) != null) {
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result.add(new Rule());
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} else {
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result.add(new Rule(Integer.parseInt(matcher.group(4)),
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matcher.group(5),
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matcher.group(7),
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matcher.group(9),
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matcher.group(10),
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"g".equals(matcher.group(11))));
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}
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remaining = remaining.substring(matcher.end());
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}
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return result;
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}
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/**
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* Set the static configuration to get the rules.
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* @param conf the new configuration
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* @throws IOException
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*/
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public static void setConfiguration(Configuration conf) throws IOException {
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String ruleString = conf.get("hadoop.security.auth_to_local", "DEFAULT");
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rules = parseRules(ruleString);
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}
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@SuppressWarnings("serial")
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public static class BadFormatString extends IOException {
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BadFormatString(String msg) {
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super(msg);
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}
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BadFormatString(String msg, Throwable err) {
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super(msg, err);
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}
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}
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@SuppressWarnings("serial")
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public static class NoMatchingRule extends IOException {
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NoMatchingRule(String msg) {
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super(msg);
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}
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}
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/**
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* Get the translation of the principal name into an operating system
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* user name.
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* @return the short name
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* @throws IOException
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*/
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public String getShortName() throws IOException {
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String[] params;
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if (hostName == null) {
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// if it is already simple, just return it
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if (realm == null) {
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return serviceName;
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}
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params = new String[]{realm, serviceName};
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} else {
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params = new String[]{realm, serviceName, hostName};
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}
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for(Rule r: rules) {
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String result = r.apply(params);
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if (result != null) {
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return result;
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}
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}
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throw new NoMatchingRule("No rules applied to " + toString());
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}
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static void printRules() throws IOException {
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int i = 0;
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for(Rule r: rules) {
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System.out.println(++i + " " + r);
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}
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}
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public static void main(String[] args) throws Exception {
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setConfiguration(new Configuration());
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for(String arg: args) {
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KerberosName name = new KerberosName(arg);
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System.out.println("Name: " + name + " to " + name.getShortName());
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}
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}
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}
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@ -1,90 +0,0 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
|
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* "License"); you may not use this file except in compliance
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* with the License. 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.
|
||||
* 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.apache.hadoop.security;
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import java.io.IOException;
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import org.apache.hadoop.conf.Configuration;
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import org.junit.Before;
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import org.junit.Test;
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import static org.junit.Assert.*;
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public class TestKerberosName {
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@Before
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public void setUp() throws Exception {
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Configuration conf = new Configuration();
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conf.set("hadoop.security.auth_to_local",
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("RULE:[1:$1@$0](.*@YAHOO\\.COM)s/@.*//\n" +
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"RULE:[2:$1](johndoe)s/^.*$/guest/\n" +
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"RULE:[2:$1;$2](^.*;admin$)s/;admin$//\n" +
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"RULE:[2:$2](root)\n" +
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"DEFAULT"));
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conf.set("hadoop.security.authentication", "kerberos");
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KerberosName.setConfiguration(conf);
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KerberosName.printRules();
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}
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private void checkTranslation(String from, String to) throws Exception {
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System.out.println("Translate " + from);
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KerberosName nm = new KerberosName(from);
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String simple = nm.getShortName();
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System.out.println("to " + simple);
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assertEquals("short name incorrect", to, simple);
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}
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@Test
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public void testRules() throws Exception {
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checkTranslation("omalley@APACHE.ORG", "omalley");
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checkTranslation("hdfs/10.0.0.1@APACHE.ORG", "hdfs");
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checkTranslation("oom@YAHOO.COM", "oom");
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checkTranslation("johndoe/zoo@FOO.COM", "guest");
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checkTranslation("joe/admin@FOO.COM", "joe");
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checkTranslation("joe/root@FOO.COM", "root");
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}
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private void checkBadName(String name) {
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System.out.println("Checking " + name + " to ensure it is bad.");
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try {
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new KerberosName(name);
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fail("didn't get exception for " + name);
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} catch (IllegalArgumentException iae) {
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// PASS
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}
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}
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private void checkBadTranslation(String from) {
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System.out.println("Checking bad translation for " + from);
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KerberosName nm = new KerberosName(from);
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try {
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nm.getShortName();
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fail("didn't get exception for " + from);
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} catch (IOException ie) {
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// PASS
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}
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}
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@Test
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public void testAntiPatterns() throws Exception {
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checkBadName("owen/owen/owen@FOO.COM");
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checkBadName("owen@foo/bar.com");
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checkBadTranslation("foo@ACME.COM");
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checkBadTranslation("root/joe@FOO.COM");
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}
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}
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