2 // ========================================================================
3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
4 // ------------------------------------------------------------------------
5 // All rights reserved. This program and the accompanying materials
6 // are made available under the terms of the Eclipse Public License v1.0
7 // and Apache License v2.0 which accompanies this distribution.
9 // The Eclipse Public License is available at
10 // http://www.eclipse.org/legal/epl-v10.html
12 // The Apache License v2.0 is available at
13 // http://www.opensource.org/licenses/apache2.0.php
15 // You may elect to redistribute this code under either of these licenses.
16 // ========================================================================
19 package org.eclipse.jetty.util.security;
21 import java.io.IOException;
22 import java.nio.charset.StandardCharsets;
23 import java.util.Arrays;
25 import org.eclipse.jetty.util.log.Log;
26 import org.eclipse.jetty.util.log.Logger;
28 /* ------------------------------------------------------------ */
30 * Password utility class.
32 * This utility class gets a password or pass phrase either by:
35 * + Password is set as a system property.
36 * + The password is prompted for and read from standard input
37 * + A program is run to get the password.
40 * Passwords that begin with OBF: are de obfuscated. Passwords can be obfuscated
41 * by run org.eclipse.util.Password as a main class. Obfuscated password are
42 * required if a system needs to recover the full password (eg. so that it may
43 * be passed to another system). They are not secure, but prevent casual
46 * Passwords that begin with CRYPT: are oneway encrypted with UnixCrypt. The
47 * real password cannot be retrieved, but comparisons can be made to other
48 * passwords. A Crypt can be generated by running org.eclipse.util.UnixCrypt as
49 * a main class, passing password and then the username. Checksum passwords are
50 * a secure(ish) way to store passwords that only need to be checked rather than
51 * recovered. Note that it is not strong security - specially if simple
56 public class Password extends Credential
58 private static final Logger LOG = Log.getLogger(Password.class);
60 private static final long serialVersionUID = 5062906681431569445L;
62 public static final String __OBFUSCATE = "OBF:";
66 /* ------------------------------------------------------------ */
70 * @param password The String password.
72 public Password(String password)
77 while (_pw != null && _pw.startsWith(__OBFUSCATE))
78 _pw = deobfuscate(_pw);
81 /* ------------------------------------------------------------ */
83 public String toString()
88 /* ------------------------------------------------------------ */
89 public String toStarString()
91 return "*****************************************************".substring(0, _pw.length());
94 /* ------------------------------------------------------------ */
96 public boolean check(Object credentials)
98 if (this == credentials) return true;
100 if (credentials instanceof Password) return credentials.equals(_pw);
102 if (credentials instanceof String) return credentials.equals(_pw);
104 if (credentials instanceof char[]) return Arrays.equals(_pw.toCharArray(), (char[]) credentials);
106 if (credentials instanceof Credential) return ((Credential) credentials).check(_pw);
111 /* ------------------------------------------------------------ */
113 public boolean equals(Object o)
121 if (o instanceof Password)
123 Password p = (Password) o;
124 //noinspection StringEquality
125 return p._pw == _pw || (null != _pw && _pw.equals(p._pw));
128 if (o instanceof String)
129 return o.equals(_pw);
134 /* ------------------------------------------------------------ */
136 public int hashCode()
138 return null == _pw ? super.hashCode() : _pw.hashCode();
141 /* ------------------------------------------------------------ */
142 public static String obfuscate(String s)
144 StringBuilder buf = new StringBuilder();
145 byte[] b = s.getBytes(StandardCharsets.UTF_8);
147 buf.append(__OBFUSCATE);
148 for (int i = 0; i < b.length; i++)
151 byte b2 = b[b.length - (i + 1)];
154 int i0 = (0xff&b1)*256 + (0xff&b2);
155 String x = Integer.toString(i0, 36).toLowerCase();
156 buf.append("U0000",0,5-x.length());
161 int i1 = 127 + b1 + b2;
162 int i2 = 127 + b1 - b2;
163 int i0 = i1 * 256 + i2;
164 String x = Integer.toString(i0, 36).toLowerCase();
166 int j0 = Integer.parseInt(x, 36);
169 byte bx = (byte) ((j1 + j2 - 254) / 2);
171 buf.append("000",0,4-x.length());
176 return buf.toString();
180 /* ------------------------------------------------------------ */
181 public static String deobfuscate(String s)
183 if (s.startsWith(__OBFUSCATE)) s = s.substring(4);
185 byte[] b = new byte[s.length() / 2];
187 for (int i = 0; i < s.length(); i += 4)
189 if (s.charAt(i)=='U')
192 String x = s.substring(i, i + 4);
193 int i0 = Integer.parseInt(x, 36);
194 byte bx = (byte)(i0>>8);
199 String x = s.substring(i, i + 4);
200 int i0 = Integer.parseInt(x, 36);
203 byte bx = (byte) ((i1 + i2 - 254) / 2);
208 return new String(b, 0, l,StandardCharsets.UTF_8);
211 /* ------------------------------------------------------------ */
213 * Get a password. A password is obtained by trying
215 * <LI>Calling <Code>System.getProperty(realm,dft)</Code>
216 * <LI>Prompting for a password
217 * <LI>Using promptDft if nothing was entered.
220 * @param realm The realm name for the password, used as a SystemProperty
222 * @param dft The default password.
223 * @param promptDft The default to use if prompting for the password.
226 public static Password getPassword(String realm, String dft, String promptDft)
228 String passwd = System.getProperty(realm, dft);
229 if (passwd == null || passwd.length() == 0)
233 System.out.print(realm + ((promptDft != null && promptDft.length() > 0) ? " [dft]" : "") + " : ");
235 byte[] buf = new byte[512];
236 int len = System.in.read(buf);
237 if (len > 0) passwd = new String(buf, 0, len).trim();
239 catch (IOException e)
241 LOG.warn(Log.EXCEPTION, e);
243 if (passwd == null || passwd.length() == 0) passwd = promptDft;
245 return new Password(passwd);
248 /* ------------------------------------------------------------ */
252 public static void main(String[] arg)
254 if (arg.length != 1 && arg.length != 2)
256 System.err.println("Usage - java org.eclipse.jetty.security.Password [<user>] <password>");
257 System.err.println("If the password is ?, the user will be prompted for the password");
260 String p = arg[arg.length == 1 ? 0 : 1];
261 Password pw = new Password(p);
262 System.err.println(pw.toString());
263 System.err.println(obfuscate(pw.toString()));
264 System.err.println(Credential.MD5.digest(p));
265 if (arg.length == 2) System.err.println(Credential.Crypt.crypt(arg[0], pw.toString()));