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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, 2009, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * 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 | + return readPassword(in, false); | |
| 41 | + } | |
| 42 | + | |
| 43 | + /** Reads user password from given input stream. | |
| 44 | + * @param isEchoOn true if the password should be echoed on the screen | |
| 45 | + */ | |
| 46 | + public static char[] readPassword(InputStream in, boolean isEchoOn) | |
| 47 | + throws IOException { | |
| 48 | + | |
| 49 | + char[] consoleEntered = null; | |
| 50 | + byte[] consoleBytes = null; | |
| 51 | + | |
| 52 | + try { | |
| 53 | + // Use the new java.io.Console class | |
| 54 | + Console con = null; | |
| 55 | + if (!isEchoOn && in == System.in && ((con = System.console()) != null)) { | |
| 56 | + consoleEntered = con.readPassword(); | |
| 57 | + // readPassword returns "" if you just print ENTER, | |
| 58 | + // to be compatible with old Password class, change to null | |
| 59 | + if (consoleEntered != null && consoleEntered.length == 0) { | |
| 60 | + return null; | |
| 61 | + } | |
| 62 | + consoleBytes = convertToBytes(consoleEntered); | |
| 63 | + in = new ByteArrayInputStream(consoleBytes); | |
| 64 | + } | |
| 65 | + | |
| 66 | + // Rest of the lines still necessary for KeyStoreLoginModule | |
| 67 | + // and when there is no console. | |
| 68 | + | |
| 69 | + char[] lineBuffer; | |
| 70 | + char[] buf; | |
| 71 | + int i; | |
| 72 | + | |
| 73 | + buf = lineBuffer = new char[128]; | |
| 74 | + | |
| 75 | + int room = buf.length; | |
| 76 | + int offset = 0; | |
| 77 | + int c; | |
| 78 | + | |
| 79 | + boolean done = false; | |
| 80 | + while (!done) { | |
| 81 | + switch (c = in.read()) { | |
| 82 | + case -1: | |
| 83 | + case '\n': | |
| 84 | + done = true; | |
| 85 | + break; | |
| 86 | + | |
| 87 | + case '\r': | |
| 88 | + int c2 = in.read(); | |
| 89 | + if ((c2 != '\n') && (c2 != -1)) { | |
| 90 | + if (!(in instanceof PushbackInputStream)) { | |
| 91 | + in = new PushbackInputStream(in); | |
| 92 | + } | |
| 93 | + ((PushbackInputStream)in).unread(c2); | |
| 94 | + } else { | |
| 95 | + done = true; | |
| 96 | + break; | |
| 97 | + } | |
| 98 | + | |
| 99 | + default: | |
| 100 | + if (--room < 0) { | |
| 101 | + buf = new char[offset + 128]; | |
| 102 | + room = buf.length - offset - 1; | |
| 103 | + System.arraycopy(lineBuffer, 0, buf, 0, offset); | |
| 104 | + Arrays.fill(lineBuffer, ' '); | |
| 105 | + lineBuffer = buf; | |
| 106 | + } | |
| 107 | + buf[offset++] = (char) c; | |
| 108 | + break; | |
| 109 | + } | |
| 110 | + } | |
| 111 | + | |
| 112 | + if (offset == 0) { | |
| 113 | + return null; | |
| 114 | + } | |
| 115 | + | |
| 116 | + char[] ret = new char[offset]; | |
| 117 | + System.arraycopy(buf, 0, ret, 0, offset); | |
| 118 | + Arrays.fill(buf, ' '); | |
| 119 | + | |
| 120 | + return ret; | |
| 121 | + } finally { | |
| 122 | + if (consoleEntered != null) { | |
| 123 | + Arrays.fill(consoleEntered, ' '); | |
| 124 | + } | |
| 125 | + if (consoleBytes != null) { | |
| 126 | + Arrays.fill(consoleBytes, (byte)0); | |
| 127 | + } | |
| 128 | + } | |
| 129 | + } | |
| 130 | + | |
| 131 | + /** | |
| 132 | + * Change a password read from Console.readPassword() into | |
| 133 | + * its original bytes. | |
| 134 | + * | |
| 135 | + * @param pass a char[] | |
| 136 | + * @return its byte[] format, similar to new String(pass).getBytes() | |
| 137 | + */ | |
| 138 | + private static byte[] convertToBytes(char[] pass) { | |
| 139 | + if (enc == null) { | |
| 140 | + synchronized (Password.class) { | |
| 141 | + enc = sun.misc.SharedSecrets.getJavaIOAccess() | |
| 142 | + .charset() | |
| 143 | + .newEncoder() | |
| 144 | + .onMalformedInput(CodingErrorAction.REPLACE) | |
| 145 | + .onUnmappableCharacter(CodingErrorAction.REPLACE); | |
| 146 | + } | |
| 147 | + } | |
| 148 | + byte[] ba = new byte[(int)(enc.maxBytesPerChar() * pass.length)]; | |
| 149 | + ByteBuffer bb = ByteBuffer.wrap(ba); | |
| 150 | + synchronized (enc) { | |
| 151 | + enc.reset().encode(CharBuffer.wrap(pass), bb, true); | |
| 152 | + } | |
| 153 | + if (bb.position() < ba.length) { | |
| 154 | + ba[bb.position()] = '\n'; | |
| 155 | + } | |
| 156 | + return ba; | |
| 157 | + } | |
| 158 | + private static volatile CharsetEncoder enc; | |
| 159 | +} | |