/src/main/java/openjdk/jdk/src/share/classes/sun/security/krb5/Config.java
Java | 1242 lines | 876 code | 54 blank | 312 comment | 208 complexity | 5d2efd797244781de3062b4448dd8c66 MD5 | raw file
Possible License(s): GPL-2.0, BSD-3-Clause, LGPL-3.0
- /*
- * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
- /*
- *
- * (C) Copyright IBM Corp. 1999 All Rights Reserved.
- * Copyright 1997 The Open Group Research Institute. All rights reserved.
- */
- package sun.security.krb5;
- import java.io.File;
- import java.io.FileInputStream;
- import java.util.Hashtable;
- import java.util.Vector;
- import java.util.ArrayList;
- import java.io.BufferedReader;
- import java.io.InputStreamReader;
- import java.io.IOException;
- import java.util.StringTokenizer;
- import java.net.InetAddress;
- import java.net.UnknownHostException;
- import java.security.AccessController;
- import java.security.PrivilegedExceptionAction;
- import java.util.Arrays;
- import java.util.List;
- import java.util.Locale;
- import sun.net.dns.ResolverConfiguration;
- import sun.security.krb5.internal.crypto.EType;
- import sun.security.krb5.internal.Krb5;
- /**
- * This class maintains key-value pairs of Kerberos configurable constants
- * from configuration file or from user specified system properties.
- */
- public class Config {
- /*
- * Only allow a single instance of Config.
- */
- private static Config singleton = null;
- /*
- * Hashtable used to store configuration information.
- */
- private Hashtable<String,Object> stanzaTable = new Hashtable<>();
- private static boolean DEBUG = sun.security.krb5.internal.Krb5.DEBUG;
- // these are used for hexdecimal calculation.
- private static final int BASE16_0 = 1;
- private static final int BASE16_1 = 16;
- private static final int BASE16_2 = 16 * 16;
- private static final int BASE16_3 = 16 * 16 * 16;
- /**
- * Specified by system properties. Must be both null or non-null.
- */
- private final String defaultRealm;
- private final String defaultKDC;
- // used for native interface
- private static native String getWindowsDirectory(boolean isSystem);
- /**
- * Gets an instance of Config class. One and only one instance (the
- * singleton) is returned.
- *
- * @exception KrbException if error occurs when constructing a Config
- * instance. Possible causes would be either of java.security.krb5.realm or
- * java.security.krb5.kdc not specified, error reading configuration file.
- */
- public static synchronized Config getInstance() throws KrbException {
- if (singleton == null) {
- singleton = new Config();
- }
- return singleton;
- }
- /**
- * Refresh and reload the Configuration. This could involve,
- * for example reading the Configuration file again or getting
- * the java.security.krb5.* system properties again. This method
- * also tries its best to update static fields in other classes
- * that depend on the configuration.
- *
- * @exception KrbException if error occurs when constructing a Config
- * instance. Possible causes would be either of java.security.krb5.realm or
- * java.security.krb5.kdc not specified, error reading configuration file.
- */
- public static synchronized void refresh() throws KrbException {
- singleton = new Config();
- KdcComm.initStatic();
- EType.initStatic();
- Checksum.initStatic();
- }
- private static boolean isMacosLionOrBetter() {
- // split the "10.x.y" version number
- String osname = getProperty("os.name");
- if (!osname.contains("OS X")) {
- return false;
- }
- String osVersion = getProperty("os.version");
- String[] fragments = osVersion.split("\\.");
- // sanity check the "10." part of the version
- if (!fragments[0].equals("10")) return false;
- if (fragments.length < 2) return false;
- // check if Mac OS X 10.7(.y)
- try {
- int minorVers = Integer.parseInt(fragments[1]);
- if (minorVers >= 7) return true;
- } catch (NumberFormatException e) {
- // was not an integer
- }
- return false;
- }
- /**
- * Private constructor - can not be instantiated externally.
- */
- private Config() throws KrbException {
- /*
- * If either one system property is specified, we throw exception.
- */
- String tmp = getProperty("java.security.krb5.kdc");
- if (tmp != null) {
- // The user can specify a list of kdc hosts separated by ":"
- defaultKDC = tmp.replace(':', ' ');
- } else {
- defaultKDC = null;
- }
- defaultRealm = getProperty("java.security.krb5.realm");
- if ((defaultKDC == null && defaultRealm != null) ||
- (defaultRealm == null && defaultKDC != null)) {
- throw new KrbException
- ("System property java.security.krb5.kdc and " +
- "java.security.krb5.realm both must be set or " +
- "neither must be set.");
- }
- // Always read the Kerberos configuration file
- try {
- List<String> configFile;
- String fileName = getJavaFileName();
- if (fileName != null) {
- configFile = loadConfigFile(fileName);
- stanzaTable = parseStanzaTable(configFile);
- if (DEBUG) {
- System.out.println("Loaded from Java config");
- }
- } else {
- boolean found = false;
- if (isMacosLionOrBetter()) {
- try {
- stanzaTable = SCDynamicStoreConfig.getConfig();
- if (DEBUG) {
- System.out.println("Loaded from SCDynamicStoreConfig");
- }
- found = true;
- } catch (IOException ioe) {
- // OK. Will go on with file
- }
- }
- if (!found) {
- fileName = getNativeFileName();
- configFile = loadConfigFile(fileName);
- stanzaTable = parseStanzaTable(configFile);
- if (DEBUG) {
- System.out.println("Loaded from native config");
- }
- }
- }
- } catch (IOException ioe) {
- // I/O error, mostly like krb5.conf missing.
- // No problem. We'll use DNS or system property etc.
- }
- }
- /**
- * Gets the last-defined string value for the specified keys.
- * @param keys the keys, as an array from section name, sub-section names
- * (if any), to value name.
- * @return the value. When there are multiple values for the same key,
- * returns the last one. {@code null} is returned if not all the keys are
- * defined. For example, {@code get("libdefaults", "forwardable")} will
- * return null if "forwardable" is not defined in [libdefaults], and
- * {@code get("realms", "R", "kdc")} will return null if "R" is not
- * defined in [realms] or "kdc" is not defined for "R".
- * @throws IllegalArgumentException if any of the keys is illegal, either
- * because a key not the last one is not a (sub)section name or the last
- * key is still a section name. For example, {@code get("libdefaults")}
- * throws this exception because [libdefaults] is a section name instead of
- * a value name, and {@code get("libdefaults", "forwardable", "tail")}
- * also throws this exception because "forwardable" is already a value name
- * and has no sub-key at all (given "forwardable" is defined, otherwise,
- * this method has no knowledge if it's a value name or a section name),
- */
- public String get(String... keys) {
- Vector<String> v = getString0(keys);
- if (v == null) return null;
- return v.lastElement();
- }
- /**
- * Gets all values for the specified keys.
- * @throws IllegalArgumentException if any of the keys is illegal
- * (See {@link #get})
- */
- public String getAll(String... keys) {
- Vector<String> v = getString0(keys);
- if (v == null) return null;
- StringBuilder sb = new StringBuilder();
- boolean first = true;
- for (String s: v) {
- if (first) {
- sb.append(s);
- first = false;
- } else {
- sb.append(' ').append(s);
- }
- }
- return sb.toString();
- }
- /**
- * Returns true if keys exists, can be either final string(s) or sub-stanza
- * @throws IllegalArgumentException if any of the keys is illegal
- * (See {@link #get})
- */
- public boolean exists(String... keys) {
- return get0(keys) != null;
- }
- // Returns final string value(s) for given keys.
- @SuppressWarnings("unchecked")
- private Vector<String> getString0(String... keys) {
- try {
- return (Vector<String>)get0(keys);
- } catch (ClassCastException cce) {
- throw new IllegalArgumentException(cce);
- }
- }
- // Internal method. Returns the value for keys, which can be a sub-stanza
- // or final string value(s).
- // The only method (except for toString) that reads stanzaTable directly.
- @SuppressWarnings("unchecked")
- private Object get0(String... keys) {
- Object current = stanzaTable;
- try {
- for (String key: keys) {
- current = ((Hashtable<String,Object>)current).get(key);
- if (current == null) return null;
- }
- return current;
- } catch (ClassCastException cce) {
- throw new IllegalArgumentException(cce);
- }
- }
- /**
- * Gets the int value for the specified keys.
- * @param keys the keys
- * @return the int value, Integer.MIN_VALUE is returned if it cannot be
- * found or the value is not a legal integer.
- * @throw IllegalArgumentException if any of the keys is illegal
- * @see #get(java.lang.String[])
- */
- public int getIntValue(String... keys) {
- String result = get(keys);
- int value = Integer.MIN_VALUE;
- if (result != null) {
- try {
- value = parseIntValue(result);
- } catch (NumberFormatException e) {
- if (DEBUG) {
- System.out.println("Exception in getting value of " +
- Arrays.toString(keys) + " " +
- e.getMessage());
- System.out.println("Setting " + Arrays.toString(keys) +
- " to minimum value");
- }
- value = Integer.MIN_VALUE;
- }
- }
- return value;
- }
- /**
- * Gets the boolean value for the specified keys.
- * @param keys the keys
- * @return the boolean value, false is returned if it cannot be
- * found or the value is not "true" (case insensitive).
- * @throw IllegalArgumentException if any of the keys is illegal
- * @see #get(java.lang.String[])
- */
- public boolean getBooleanValue(String... keys) {
- String val = get(keys);
- if (val != null && val.equalsIgnoreCase("true")) {
- return true;
- } else {
- return false;
- }
- }
- /**
- * Parses a string to an integer. The convertible strings include the
- * string representations of positive integers, negative integers, and
- * hex decimal integers. Valid inputs are, e.g., -1234, +1234,
- * 0x40000.
- *
- * @param input the String to be converted to an Integer.
- * @return an numeric value represented by the string
- * @exception NumberFormationException if the String does not contain a
- * parsable integer.
- */
- private int parseIntValue(String input) throws NumberFormatException {
- int value = 0;
- if (input.startsWith("+")) {
- String temp = input.substring(1);
- return Integer.parseInt(temp);
- } else if (input.startsWith("0x")) {
- String temp = input.substring(2);
- char[] chars = temp.toCharArray();
- if (chars.length > 8) {
- throw new NumberFormatException();
- } else {
- for (int i = 0; i < chars.length; i++) {
- int index = chars.length - i - 1;
- switch (chars[i]) {
- case '0':
- value += 0;
- break;
- case '1':
- value += 1 * getBase(index);
- break;
- case '2':
- value += 2 * getBase(index);
- break;
- case '3':
- value += 3 * getBase(index);
- break;
- case '4':
- value += 4 * getBase(index);
- break;
- case '5':
- value += 5 * getBase(index);
- break;
- case '6':
- value += 6 * getBase(index);
- break;
- case '7':
- value += 7 * getBase(index);
- break;
- case '8':
- value += 8 * getBase(index);
- break;
- case '9':
- value += 9 * getBase(index);
- break;
- case 'a':
- case 'A':
- value += 10 * getBase(index);
- break;
- case 'b':
- case 'B':
- value += 11 * getBase(index);
- break;
- case 'c':
- case 'C':
- value += 12 * getBase(index);
- break;
- case 'd':
- case 'D':
- value += 13 * getBase(index);
- break;
- case 'e':
- case 'E':
- value += 14 * getBase(index);
- break;
- case 'f':
- case 'F':
- value += 15 * getBase(index);
- break;
- default:
- throw new NumberFormatException("Invalid numerical format");
- }
- }
- }
- if (value < 0) {
- throw new NumberFormatException("Data overflow.");
- }
- } else {
- value = Integer.parseInt(input);
- }
- return value;
- }
- private int getBase(int i) {
- int result = 16;
- switch (i) {
- case 0:
- result = BASE16_0;
- break;
- case 1:
- result = BASE16_1;
- break;
- case 2:
- result = BASE16_2;
- break;
- case 3:
- result = BASE16_3;
- break;
- default:
- for (int j = 1; j < i; j++) {
- result *= 16;
- }
- }
- return result;
- }
- /**
- * Reads lines to the memory from the configuration file.
- *
- * Configuration file contains information about the default realm,
- * ticket parameters, location of the KDC and the admin server for
- * known realms, etc. The file is divided into sections. Each section
- * contains one or more name/value pairs with one pair per line. A
- * typical file would be:
- * <pre>
- * [libdefaults]
- * default_realm = EXAMPLE.COM
- * default_tgs_enctypes = des-cbc-md5
- * default_tkt_enctypes = des-cbc-md5
- * [realms]
- * EXAMPLE.COM = {
- * kdc = kerberos.example.com
- * kdc = kerberos-1.example.com
- * admin_server = kerberos.example.com
- * }
- * SAMPLE_COM = {
- * kdc = orange.sample.com
- * admin_server = orange.sample.com
- * }
- * [domain_realm]
- * blue.sample.com = TEST.SAMPLE.COM
- * .backup.com = EXAMPLE.COM
- * </pre>
- * @return an ordered list of strings representing the config file after
- * some initial processing, including:<ol>
- * <li> Comment lines and empty lines are removed
- * <li> "{" not at the end of a line is appended to the previous line
- * <li> The content of a section is also placed between "{" and "}".
- * <li> Lines are trimmed</ol>
- * @throws IOException if there is an I/O error
- * @throws KrbException if there is a file format error
- */
- private List<String> loadConfigFile(final String fileName)
- throws IOException, KrbException {
- try {
- List<String> v = new ArrayList<>();
- try (BufferedReader br = new BufferedReader(new InputStreamReader(
- AccessController.doPrivileged(
- new PrivilegedExceptionAction<FileInputStream> () {
- public FileInputStream run() throws IOException {
- return new FileInputStream(fileName);
- }
- })))) {
- String line;
- String previous = null;
- while ((line = br.readLine()) != null) {
- line = line.trim();
- if (line.startsWith("#") || line.isEmpty()) {
- // ignore comments and blank line
- // Comments start with #.
- continue;
- }
- // In practice, a subsection might look like:
- // [realms]
- // EXAMPLE.COM =
- // {
- // kdc = kerberos.example.com
- // ...
- // }
- // Before parsed into stanza table, it needs to be
- // converted into a canonicalized style (no indent):
- // realms = {
- // EXAMPLE.COM = {
- // kdc = kerberos.example.com
- // ...
- // }
- // }
- //
- if (line.startsWith("[")) {
- if (!line.endsWith("]")) {
- throw new KrbException("Illegal config content:"
- + line);
- }
- if (previous != null) {
- v.add(previous);
- v.add("}");
- }
- String title = line.substring(
- 1, line.length()-1).trim();
- if (title.isEmpty()) {
- throw new KrbException("Illegal config content:"
- + line);
- }
- previous = title + " = {";
- } else if (line.startsWith("{")) {
- if (previous == null) {
- throw new KrbException(
- "Config file should not start with \"{\"");
- }
- previous += " {";
- if (line.length() > 1) {
- // { and content on the same line
- v.add(previous);
- previous = line.substring(1).trim();
- }
- } else {
- if (previous == null) {
- throw new KrbException(
- "Config file must starts with a section");
- }
- v.add(previous);
- previous = line;
- }
- }
- if (previous != null) {
- v.add(previous);
- v.add("}");
- }
- }
- return v;
- } catch (java.security.PrivilegedActionException pe) {
- throw (IOException)pe.getException();
- }
- }
- /**
- * Parses stanza names and values from configuration file to
- * stanzaTable (Hashtable). Hashtable key would be stanza names,
- * (libdefaults, realms, domain_realms, etc), and the hashtable value
- * would be another hashtable which contains the key-value pairs under
- * a stanza name. The value of this sub-hashtable can be another hashtable
- * containing another sub-sub-section or a vector of strings for
- * final values (even if there is only one value defined).
- * <p>
- * For duplicates section names, the latter overwrites the former. For
- * duplicate value names, the values are in a vector in its appearing order.
- * </ol>
- * Please note that this behavior is Java traditional. and it is
- * not the same as the MIT krb5 behavior, where:<ol>
- * <li>Duplicated root sections will be merged
- * <li>For duplicated sub-sections, the former overwrites the latter
- * <li>Duplicate keys for values are always saved in a vector
- * </ol>
- * @param v the strings in the file, never null, might be empty
- * @throws KrbException if there is a file format error
- */
- @SuppressWarnings("unchecked")
- private Hashtable<String,Object> parseStanzaTable(List<String> v)
- throws KrbException {
- Hashtable<String,Object> current = stanzaTable;
- for (String line: v) {
- // There are 3 kinds of lines
- // 1. a = b
- // 2. a = {
- // 3. }
- if (line.equals("}")) {
- // Go back to parent, see below
- current = (Hashtable<String,Object>)current.remove(" PARENT ");
- if (current == null) {
- throw new KrbException("Unmatched close brace");
- }
- } else {
- int pos = line.indexOf('=');
- if (pos < 0) {
- throw new KrbException("Illegal config content:" + line);
- }
- String key = line.substring(0, pos).trim();
- String value = trimmed(line.substring(pos+1));
- if (value.equals("{")) {
- Hashtable<String,Object> subTable;
- if (current == stanzaTable) {
- key = key.toLowerCase(Locale.US);
- }
- subTable = new Hashtable<>();
- current.put(key, subTable);
- // A special entry for its parent. Put whitespaces around,
- // so will never be confused with a normal key
- subTable.put(" PARENT ", current);
- current = subTable;
- } else {
- Vector<String> values;
- if (current.containsKey(key)) {
- Object obj = current.get(key);
- // If a key first shows as a section and then a value,
- // this is illegal. However, we haven't really forbid
- // first value then section, which the final result
- // is a section.
- if (!(obj instanceof Vector)) {
- throw new KrbException("Key " + key
- + "used for both value and section");
- }
- values = (Vector<String>)current.get(key);
- } else {
- values = new Vector<String>();
- current.put(key, values);
- }
- values.add(value);
- }
- }
- }
- if (current != stanzaTable) {
- throw new KrbException("Not closed");
- }
- return current;
- }
- /**
- * Gets the default Java configuration file name.
- *
- * If the system property "java.security.krb5.conf" is defined, we'll
- * use its value, no matter if the file exists or not. Otherwise, we
- * will look at $JAVA_HOME/lib/security directory with "krb5.conf" name,
- * and return it if the file exists.
- *
- * The method returns null if it cannot find a Java config file.
- */
- private String getJavaFileName() {
- String name = getProperty("java.security.krb5.conf");
- if (name == null) {
- name = getProperty("java.home") + File.separator +
- "lib" + File.separator + "security" +
- File.separator + "krb5.conf";
- if (!fileExists(name)) {
- name = null;
- }
- }
- if (DEBUG) {
- System.out.println("Java config name: " + name);
- }
- return name;
- }
- /**
- * Gets the default native configuration file name.
- *
- * Depending on the OS type, the method returns the default native
- * kerberos config file name, which is at windows directory with
- * the name of "krb5.ini" for Windows, /etc/krb5/krb5.conf for Solaris,
- * /etc/krb5.conf otherwise. Mac OSX X has a different file name.
- *
- * Note: When the Terminal Service is started in Windows (from 2003),
- * there are two kinds of Windows directories: A system one (say,
- * C:\Windows), and a user-private one (say, C:\Users\Me\Windows).
- * We will first look for krb5.ini in the user-private one. If not
- * found, try the system one instead.
- *
- * This method will always return a non-null non-empty file name,
- * even if that file does not exist.
- */
- private String getNativeFileName() {
- String name = null;
- String osname = getProperty("os.name");
- if (osname.startsWith("Windows")) {
- try {
- Credentials.ensureLoaded();
- } catch (Exception e) {
- // ignore exceptions
- }
- if (Credentials.alreadyLoaded) {
- String path = getWindowsDirectory(false);
- if (path != null) {
- if (path.endsWith("\\")) {
- path = path + "krb5.ini";
- } else {
- path = path + "\\krb5.ini";
- }
- if (fileExists(path)) {
- name = path;
- }
- }
- if (name == null) {
- path = getWindowsDirectory(true);
- if (path != null) {
- if (path.endsWith("\\")) {
- path = path + "krb5.ini";
- } else {
- path = path + "\\krb5.ini";
- }
- name = path;
- }
- }
- }
- if (name == null) {
- name = "c:\\winnt\\krb5.ini";
- }
- } else if (osname.startsWith("SunOS")) {
- name = "/etc/krb5/krb5.conf";
- } else if (osname.contains("OS X")) {
- name = findMacosConfigFile();
- } else {
- name = "/etc/krb5.conf";
- }
- if (DEBUG) {
- System.out.println("Native config name: " + name);
- }
- return name;
- }
- private static String getProperty(String property) {
- return java.security.AccessController.doPrivileged(
- new sun.security.action.GetPropertyAction(property));
- }
- private String findMacosConfigFile() {
- String userHome = getProperty("user.home");
- final String PREF_FILE = "/Library/Preferences/edu.mit.Kerberos";
- String userPrefs = userHome + PREF_FILE;
- if (fileExists(userPrefs)) {
- return userPrefs;
- }
- if (fileExists(PREF_FILE)) {
- return PREF_FILE;
- }
- return "/etc/krb5.conf";
- }
- private static String trimmed(String s) {
- s = s.trim();
- if (s.isEmpty()) return s;
- if (s.charAt(0) == '"' && s.charAt(s.length()-1) == '"' ||
- s.charAt(0) == '\'' && s.charAt(s.length()-1) == '\'') {
- s = s.substring(1, s.length()-1).trim();
- }
- return s;
- }
- /**
- * For testing purpose. This method lists all information being parsed from
- * the configuration file to the hashtable.
- */
- public void listTable() {
- System.out.println(this);
- }
- /**
- * Returns all etypes specified in krb5.conf for the given configName,
- * or all the builtin defaults. This result is always non-empty.
- * If no etypes are found, an exception is thrown.
- */
- public int[] defaultEtype(String configName) throws KrbException {
- String default_enctypes;
- default_enctypes = get("libdefaults", configName);
- int[] etype;
- if (default_enctypes == null) {
- if (DEBUG) {
- System.out.println("Using builtin default etypes for " +
- configName);
- }
- etype = EType.getBuiltInDefaults();
- } else {
- String delim = " ";
- StringTokenizer st;
- for (int j = 0; j < default_enctypes.length(); j++) {
- if (default_enctypes.substring(j, j + 1).equals(",")) {
- // only two delimiters are allowed to use
- // according to Kerberos DCE doc.
- delim = ",";
- break;
- }
- }
- st = new StringTokenizer(default_enctypes, delim);
- int len = st.countTokens();
- ArrayList<Integer> ls = new ArrayList<>(len);
- int type;
- for (int i = 0; i < len; i++) {
- type = Config.getType(st.nextToken());
- if (type != -1 && EType.isSupported(type)) {
- ls.add(type);
- }
- }
- if (ls.isEmpty()) {
- throw new KrbException("no supported default etypes for "
- + configName);
- } else {
- etype = new int[ls.size()];
- for (int i = 0; i < etype.length; i++) {
- etype[i] = ls.get(i);
- }
- }
- }
- if (DEBUG) {
- System.out.print("default etypes for " + configName + ":");
- for (int i = 0; i < etype.length; i++) {
- System.out.print(" " + etype[i]);
- }
- System.out.println(".");
- }
- return etype;
- }
- /**
- * Get the etype and checksum value for the specified encryption and
- * checksum type.
- *
- */
- /*
- * This method converts the string representation of encryption type and
- * checksum type to int value that can be later used by EType and
- * Checksum classes.
- */
- public static int getType(String input) {
- int result = -1;
- if (input == null) {
- return result;
- }
- if (input.startsWith("d") || (input.startsWith("D"))) {
- if (input.equalsIgnoreCase("des-cbc-crc")) {
- result = EncryptedData.ETYPE_DES_CBC_CRC;
- } else if (input.equalsIgnoreCase("des-cbc-md5")) {
- result = EncryptedData.ETYPE_DES_CBC_MD5;
- } else if (input.equalsIgnoreCase("des-mac")) {
- result = Checksum.CKSUMTYPE_DES_MAC;
- } else if (input.equalsIgnoreCase("des-mac-k")) {
- result = Checksum.CKSUMTYPE_DES_MAC_K;
- } else if (input.equalsIgnoreCase("des-cbc-md4")) {
- result = EncryptedData.ETYPE_DES_CBC_MD4;
- } else if (input.equalsIgnoreCase("des3-cbc-sha1") ||
- input.equalsIgnoreCase("des3-hmac-sha1") ||
- input.equalsIgnoreCase("des3-cbc-sha1-kd") ||
- input.equalsIgnoreCase("des3-cbc-hmac-sha1-kd")) {
- result = EncryptedData.ETYPE_DES3_CBC_HMAC_SHA1_KD;
- }
- } else if (input.startsWith("a") || (input.startsWith("A"))) {
- // AES
- if (input.equalsIgnoreCase("aes128-cts") ||
- input.equalsIgnoreCase("aes128-cts-hmac-sha1-96")) {
- result = EncryptedData.ETYPE_AES128_CTS_HMAC_SHA1_96;
- } else if (input.equalsIgnoreCase("aes256-cts") ||
- input.equalsIgnoreCase("aes256-cts-hmac-sha1-96")) {
- result = EncryptedData.ETYPE_AES256_CTS_HMAC_SHA1_96;
- // ARCFOUR-HMAC
- } else if (input.equalsIgnoreCase("arcfour-hmac") ||
- input.equalsIgnoreCase("arcfour-hmac-md5")) {
- result = EncryptedData.ETYPE_ARCFOUR_HMAC;
- }
- // RC4-HMAC
- } else if (input.equalsIgnoreCase("rc4-hmac")) {
- result = EncryptedData.ETYPE_ARCFOUR_HMAC;
- } else if (input.equalsIgnoreCase("CRC32")) {
- result = Checksum.CKSUMTYPE_CRC32;
- } else if (input.startsWith("r") || (input.startsWith("R"))) {
- if (input.equalsIgnoreCase("rsa-md5")) {
- result = Checksum.CKSUMTYPE_RSA_MD5;
- } else if (input.equalsIgnoreCase("rsa-md5-des")) {
- result = Checksum.CKSUMTYPE_RSA_MD5_DES;
- }
- } else if (input.equalsIgnoreCase("hmac-sha1-des3-kd")) {
- result = Checksum.CKSUMTYPE_HMAC_SHA1_DES3_KD;
- } else if (input.equalsIgnoreCase("hmac-sha1-96-aes128")) {
- result = Checksum.CKSUMTYPE_HMAC_SHA1_96_AES128;
- } else if (input.equalsIgnoreCase("hmac-sha1-96-aes256")) {
- result = Checksum.CKSUMTYPE_HMAC_SHA1_96_AES256;
- } else if (input.equalsIgnoreCase("hmac-md5-rc4") ||
- input.equalsIgnoreCase("hmac-md5-arcfour") ||
- input.equalsIgnoreCase("hmac-md5-enc")) {
- result = Checksum.CKSUMTYPE_HMAC_MD5_ARCFOUR;
- } else if (input.equalsIgnoreCase("NULL")) {
- result = EncryptedData.ETYPE_NULL;
- }
- return result;
- }
- /**
- * Resets the default kdc realm.
- * We do not need to synchronize these methods since assignments are atomic
- *
- * This method was useless. Kept here in case some class still calls it.
- */
- public void resetDefaultRealm(String realm) {
- if (DEBUG) {
- System.out.println(">>> Config try resetting default kdc " + realm);
- }
- }
- /**
- * Check to use addresses in tickets
- * use addresses if "no_addresses" or "noaddresses" is set to false
- */
- public boolean useAddresses() {
- boolean useAddr = false;
- // use addresses if "no_addresses" is set to false
- String value = get("libdefaults", "no_addresses");
- useAddr = (value != null && value.equalsIgnoreCase("false"));
- if (useAddr == false) {
- // use addresses if "noaddresses" is set to false
- value = get("libdefaults", "noaddresses");
- useAddr = (value != null && value.equalsIgnoreCase("false"));
- }
- return useAddr;
- }
- /**
- * Check if need to use DNS to locate Kerberos services
- */
- private boolean useDNS(String name) {
- String value = get("libdefaults", name);
- if (value == null) {
- value = get("libdefaults", "dns_fallback");
- if ("false".equalsIgnoreCase(value)) {
- return false;
- } else {
- return true;
- }
- } else {
- return value.equalsIgnoreCase("true");
- }
- }
- /**
- * Check if need to use DNS to locate the KDC
- */
- private boolean useDNS_KDC() {
- return useDNS("dns_lookup_kdc");
- }
- /*
- * Check if need to use DNS to locate the Realm
- */
- private boolean useDNS_Realm() {
- return useDNS("dns_lookup_realm");
- }
- /**
- * Gets default realm.
- * @throws KrbException where no realm can be located
- * @return the default realm, always non null
- */
- public String getDefaultRealm() throws KrbException {
- if (defaultRealm != null) {
- return defaultRealm;
- }
- Exception cause = null;
- String realm = get("libdefaults", "default_realm");
- if ((realm == null) && useDNS_Realm()) {
- // use DNS to locate Kerberos realm
- try {
- realm = getRealmFromDNS();
- } catch (KrbException ke) {
- cause = ke;
- }
- }
- if (realm == null) {
- realm = java.security.AccessController.doPrivileged(
- new java.security.PrivilegedAction<String>() {
- @Override
- public String run() {
- String osname = System.getProperty("os.name");
- if (osname.startsWith("Windows")) {
- return System.getenv("USERDNSDOMAIN");
- }
- return null;
- }
- });
- }
- if (realm == null) {
- KrbException ke = new KrbException("Cannot locate default realm");
- if (cause != null) {
- ke.initCause(cause);
- }
- throw ke;
- }
- return realm;
- }
- /**
- * Returns a list of KDC's with each KDC separated by a space
- *
- * @param realm the realm for which the KDC list is desired
- * @throws KrbException if there's no way to find KDC for the realm
- * @return the list of KDCs separated by a space, always non null
- */
- public String getKDCList(String realm) throws KrbException {
- if (realm == null) {
- realm = getDefaultRealm();
- }
- if (realm.equalsIgnoreCase(defaultRealm)) {
- return defaultKDC;
- }
- Exception cause = null;
- String kdcs = getAll("realms", realm, "kdc");
- if ((kdcs == null) && useDNS_KDC()) {
- // use DNS to locate KDC
- try {
- kdcs = getKDCFromDNS(realm);
- } catch (KrbException ke) {
- cause = ke;
- }
- }
- if (kdcs == null) {
- kdcs = java.security.AccessController.doPrivileged(
- new java.security.PrivilegedAction<String>() {
- @Override
- public String run() {
- String osname = System.getProperty("os.name");
- if (osname.startsWith("Windows")) {
- String logonServer = System.getenv("LOGONSERVER");
- if (logonServer != null
- && logonServer.startsWith("\\\\")) {
- logonServer = logonServer.substring(2);
- }
- return logonServer;
- }
- return null;
- }
- });
- }
- if (kdcs == null) {
- if (defaultKDC != null) {
- return defaultKDC;
- }
- KrbException ke = new KrbException("Cannot locate KDC");
- if (cause != null) {
- ke.initCause(cause);
- }
- throw ke;
- }
- return kdcs;
- }
- /**
- * Locate Kerberos realm using DNS
- *
- * @return the Kerberos realm
- */
- private String getRealmFromDNS() throws KrbException {
- // use DNS to locate Kerberos realm
- String realm = null;
- String hostName = null;
- try {
- hostName = InetAddress.getLocalHost().getCanonicalHostName();
- } catch (UnknownHostException e) {
- KrbException ke = new KrbException(Krb5.KRB_ERR_GENERIC,
- "Unable to locate Kerberos realm: " + e.getMessage());
- ke.initCause(e);
- throw (ke);
- }
- // get the domain realm mapping from the configuration
- String mapRealm = PrincipalName.mapHostToRealm(hostName);
- if (mapRealm == null) {
- // No match. Try search and/or domain in /etc/resolv.conf
- List<String> srchlist = ResolverConfiguration.open().searchlist();
- for (String domain: srchlist) {
- realm = checkRealm(domain);
- if (realm != null) {
- break;
- }
- }
- } else {
- realm = checkRealm(mapRealm);
- }
- if (realm == null) {
- throw new KrbException(Krb5.KRB_ERR_GENERIC,
- "Unable to locate Kerberos realm");
- }
- return realm;
- }
- /**
- * Check if the provided realm is the correct realm
- * @return the realm if correct, or null otherwise
- */
- private static String checkRealm(String mapRealm) {
- if (DEBUG) {
- System.out.println("getRealmFromDNS: trying " + mapRealm);
- }
- String[] records = null;
- String newRealm = mapRealm;
- while ((records == null) && (newRealm != null)) {
- // locate DNS TXT record
- records = KrbServiceLocator.getKerberosService(newRealm);
- newRealm = Realm.parseRealmComponent(newRealm);
- // if no DNS TXT records found, try again using sub-realm
- }
- if (records != null) {
- for (int i = 0; i < records.length; i++) {
- if (records[i].equalsIgnoreCase(mapRealm)) {
- return records[i];
- }
- }
- }
- return null;
- }
- /**
- * Locate KDC using DNS
- *
- * @param realm the realm for which the master KDC is desired
- * @return the KDC
- */
- private String getKDCFromDNS(String realm) throws KrbException {
- // use DNS to locate KDC
- String kdcs = "";
- String[] srvs = null;
- // locate DNS SRV record using UDP
- if (DEBUG) {
- System.out.println("getKDCFromDNS using UDP");
- }
- srvs = KrbServiceLocator.getKerberosService(realm, "_udp");
- if (srvs == null) {
- // locate DNS SRV record using TCP
- if (DEBUG) {
- System.out.println("getKDCFromDNS using TCP");
- }
- srvs = KrbServiceLocator.getKerberosService(realm, "_tcp");
- }
- if (srvs == null) {
- // no DNS SRV records
- throw new KrbException(Krb5.KRB_ERR_GENERIC,
- "Unable to locate KDC for realm " + realm);
- }
- if (srvs.length == 0) {
- return null;
- }
- for (int i = 0; i < srvs.length; i++) {
- kdcs += srvs[i].trim() + " ";
- }
- kdcs = kdcs.trim();
- if (kdcs.equals("")) {
- return null;
- }
- return kdcs;
- }
- private boolean fileExists(String name) {
- return java.security.AccessController.doPrivileged(
- new FileExistsAction(name));
- }
- static class FileExistsAction
- implements java.security.PrivilegedAction<Boolean> {
- private String fileName;
- public FileExistsAction(String fileName) {
- this.fileName = fileName;
- }
- public Boolean run() {
- return new File(fileName).exists();
- }
- }
- // Shows the content of the Config object for debug purpose.
- //
- // {
- // libdefaults = {
- // default_realm = R
- // }
- // realms = {
- // R = {
- // kdc = [k1,k2]
- // }
- // }
- // }
- @Override
- public String toString() {
- StringBuffer sb = new StringBuffer();
- toStringInternal("", stanzaTable, sb);
- return sb.toString();
- }
- private static void toStringInternal(String prefix, Object obj,
- StringBuffer sb) {
- if (obj instanceof String) {
- // A string value, just print it
- sb.append(obj).append('\n');
- } else if (obj instanceof Hashtable) {
- // A table, start a new sub-section...
- Hashtable<?, ?> tab = (Hashtable<?, ?>)obj;
- sb.append("{\n");
- for (Object o: tab.keySet()) {
- // ...indent, print "key = ", and
- sb.append(prefix).append(" ").append(o).append(" = ");
- // ...go recursively into value
- toStringInternal(prefix + " ", tab.get(o), sb);
- }
- sb.append(prefix).append("}\n");
- } else if (obj instanceof Vector) {
- // A vector of strings, print them inside [ and ]
- Vector<?> v = (Vector<?>)obj;
- sb.append("[");
- boolean first = true;
- for (Object o: v.toArray()) {
- if (!first) sb.append(",");
- sb.append(o);
- first = false;
- }
- sb.append("]\n");
- }
- }
- }