J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.security.util; |
| 27 | |
| 28 | import java.io.*; |
| 29 | import java.nio.*; |
| 30 | import java.nio.charset.*; |
| 31 | import java.util.Arrays; |
| 32 | |
| 33 | /** |
| 34 | * A utility class for reading passwords |
| 35 | * |
| 36 | */ |
| 37 | public class Password { |
| 38 | /** Reads user password from given input stream. */ |
| 39 | public static char[] readPassword(InputStream in) throws IOException { |
| 40 | |
| 41 | char[] consoleEntered = null; |
| 42 | byte[] consoleBytes = null; |
| 43 | |
| 44 | try { |
| 45 | // Use the new java.io.Console class |
| 46 | Console con = null; |
| 47 | if (in == System.in && ((con = System.console()) != null)) { |
| 48 | consoleEntered = con.readPassword(); |
| 49 | // readPassword returns "" if you just print ENTER, |
| 50 | // to be compatible with old Password class, change to null |
| 51 | if (consoleEntered != null && consoleEntered.length == 0) { |
| 52 | return null; |
| 53 | } |
| 54 | consoleBytes = convertToBytes(consoleEntered); |
| 55 | in = new ByteArrayInputStream(consoleBytes); |
| 56 | } |
| 57 | |
| 58 | // Rest of the lines still necessary for KeyStoreLoginModule |
| 59 | // and when there is no console. |
| 60 | |
| 61 | char[] lineBuffer; |
| 62 | char[] buf; |
| 63 | int i; |
| 64 | |
| 65 | buf = lineBuffer = new char[128]; |
| 66 | |
| 67 | int room = buf.length; |
| 68 | int offset = 0; |
| 69 | int c; |
| 70 | |
| 71 | boolean done = false; |
| 72 | while (!done) { |
| 73 | switch (c = in.read()) { |
| 74 | case -1: |
| 75 | case '\n': |
| 76 | done = true; |
| 77 | break; |
| 78 | |
| 79 | case '\r': |
| 80 | int c2 = in.read(); |
| 81 | if ((c2 != '\n') && (c2 != -1)) { |
| 82 | if (!(in instanceof PushbackInputStream)) { |
| 83 | in = new PushbackInputStream(in); |
| 84 | } |
| 85 | ((PushbackInputStream)in).unread(c2); |
| 86 | } else { |
| 87 | done = true; |
| 88 | break; |
| 89 | } |
| 90 | |
| 91 | default: |
| 92 | if (--room < 0) { |
| 93 | buf = new char[offset + 128]; |
| 94 | room = buf.length - offset - 1; |
| 95 | System.arraycopy(lineBuffer, 0, buf, 0, offset); |
| 96 | Arrays.fill(lineBuffer, ' '); |
| 97 | lineBuffer = buf; |
| 98 | } |
| 99 | buf[offset++] = (char) c; |
| 100 | break; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | if (offset == 0) { |
| 105 | return null; |
| 106 | } |
| 107 | |
| 108 | char[] ret = new char[offset]; |
| 109 | System.arraycopy(buf, 0, ret, 0, offset); |
| 110 | Arrays.fill(buf, ' '); |
| 111 | |
| 112 | return ret; |
| 113 | } finally { |
| 114 | if (consoleEntered != null) { |
| 115 | Arrays.fill(consoleEntered, ' '); |
| 116 | } |
| 117 | if (consoleBytes != null) { |
| 118 | Arrays.fill(consoleBytes, (byte)0); |
| 119 | } |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | /** |
| 124 | * Change a password read from Console.readPassword() into |
| 125 | * its original bytes. |
| 126 | * |
| 127 | * @param pass a char[] |
| 128 | * @return its byte[] format, similar to new String(pass).getBytes() |
| 129 | */ |
| 130 | private static byte[] convertToBytes(char[] pass) { |
| 131 | if (enc == null) { |
| 132 | synchronized (Password.class) { |
| 133 | enc = sun.misc.SharedSecrets.getJavaIOAccess() |
| 134 | .charset() |
| 135 | .newEncoder() |
| 136 | .onMalformedInput(CodingErrorAction.REPLACE) |
| 137 | .onUnmappableCharacter(CodingErrorAction.REPLACE); |
| 138 | } |
| 139 | } |
| 140 | byte[] ba = new byte[(int)(enc.maxBytesPerChar() * pass.length)]; |
| 141 | ByteBuffer bb = ByteBuffer.wrap(ba); |
| 142 | synchronized (enc) { |
| 143 | enc.reset().encode(CharBuffer.wrap(pass), bb, true); |
| 144 | } |
| 145 | if (bb.position() < ba.length) { |
| 146 | ba[bb.position()] = '\n'; |
| 147 | } |
| 148 | return ba; |
| 149 | } |
| 150 | private static volatile CharsetEncoder enc; |
| 151 | } |