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| 1 | /* | ||
| 2 | * Copyright (c) 1996, 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 | |||
| 27 | package sun.security.ssl; | ||
| 28 | |||
| 29 | import java.io.InputStream; | ||
| 30 | import java.io.IOException; | ||
| 31 | import java.security.MessageDigest; | ||
| 32 | |||
| 33 | import javax.net.ssl.SSLException; | ||
| 34 | |||
| 35 | /** | ||
| 36 | * InputStream for handshake data, used internally only. Contains the | ||
| 37 | * handshake message buffer and methods to parse them. | ||
| 38 | * | ||
| 39 | * Once a new handshake record arrives, it is buffered in this class until | ||
| 40 | * processed by the Handshaker. The buffer may also contain incomplete | ||
| 41 | * handshake messages in case the message is split across multiple records. | ||
| 42 | * Handshaker.process_record deals with all that. It may also contain | ||
| 43 | * handshake messages larger than the default buffer size (e.g. large | ||
| 44 | * certificate messages). The buffer is grown dynamically to handle that | ||
| 45 | * (see InputRecord.queueHandshake()). | ||
| 46 | * | ||
| 47 | * Note that the InputRecord used as a buffer here is separate from the | ||
| 48 | * AppInStream.r, which is where data from the socket is initially read | ||
| 49 | * into. This is because once the initial handshake has been completed, | ||
| 50 | * handshake and application data messages may be interleaved arbitrarily | ||
| 51 | * and must be processed independently. | ||
| 52 | * | ||
| 53 | * @author David Brownell | ||
| 54 | */ | ||
| 55 | public class HandshakeInStream extends InputStream { | ||
| 56 | |||
| 57 | InputRecord r; | ||
| 58 | |||
| 59 | /* | ||
| 60 | * Construct the stream; we'll be accumulating hashes of the | ||
| 61 | * input records using two sets of digests. | ||
| 62 | */ | ||
| 63 | HandshakeInStream(HandshakeHash handshakeHash) { | ||
| 64 | r = new InputRecord(); | ||
| 65 | r.setHandshakeHash(handshakeHash); | ||
| 66 | } | ||
| 67 | |||
| 68 | |||
| 69 | // overridden InputStream methods | ||
| 70 | |||
| 71 | /* | ||
| 72 | * Return the number of bytes available for read(). | ||
| 73 | * | ||
| 74 | * Note that this returns the bytes remaining in the buffer, not | ||
| 75 | * the bytes remaining in the current handshake message. | ||
| 76 | */ | ||
| 77 | public int available() { | ||
| 78 | return r.available(); | ||
| 79 | } | ||
| 80 | |||
| 81 | /* | ||
| 82 | * Get a byte of handshake data. | ||
| 83 | */ | ||
| 84 | public int read() throws IOException { | ||
| 85 | int n = r.read(); | ||
| 86 | if (n == -1) { | ||
| 87 | throw new SSLException("Unexpected end of handshake data"); | ||
| 88 | } | ||
| 89 | return n; | ||
| 90 | } | ||
| 91 | |||
| 92 | /* | ||
| 93 | * Get a bunch of bytes of handshake data. | ||
| 94 | */ | ||
| 95 | public int read(byte b [], int off, int len) throws IOException { | ||
| 96 | // we read from a ByteArrayInputStream, it always returns the | ||
| 97 | // data in a single read if enough is available | ||
| 98 | int n = r.read(b, off, len); | ||
| 99 | if (n != len) { | ||
| 100 | throw new SSLException("Unexpected end of handshake data"); | ||
| 101 | } | ||
| 102 | return n; | ||
| 103 | } | ||
| 104 | |||
| 105 | /* | ||
| 106 | * Skip some handshake data. | ||
| 107 | */ | ||
| 108 | public long skip(long n) throws IOException { | ||
| 109 | return r.skip(n); | ||
| 110 | } | ||
| 111 | |||
| 112 | /* | ||
| 113 | * Mark/ reset code, implemented using InputRecord mark/ reset. | ||
| 114 | * | ||
| 115 | * Note that it currently provides only a limited mark functionality | ||
| 116 | * and should be used with care (once a new handshake record has been | ||
| 117 | * read, data that has already been consumed is lost even if marked). | ||
| 118 | */ | ||
| 119 | |||
| 120 | public void mark(int readlimit) { | ||
| 121 | r.mark(readlimit); | ||
| 122 | } | ||
| 123 | |||
| 124 | public void reset() { | ||
| 125 | r.reset(); | ||
| 126 | } | ||
| 127 | |||
| 128 | public boolean markSupported() { | ||
| 129 | return true; | ||
| 130 | } | ||
| 131 | |||
| 132 | |||
| 133 | // handshake management functions | ||
| 134 | |||
| 135 | /* | ||
| 136 | * Here's an incoming record with handshake data. Queue the contents; | ||
| 137 | * it might be one or more entire messages, complete a message that's | ||
| 138 | * partly queued, or both. | ||
| 139 | */ | ||
| 140 | void incomingRecord(InputRecord in) throws IOException { | ||
| 141 | r.queueHandshake(in); | ||
| 142 | } | ||
| 143 | |||
| 144 | /* | ||
| 145 | * Hash any data we've consumed but not yet hashed. Useful mostly | ||
| 146 | * for processing client certificate messages (so we can check the | ||
| 147 | * immediately following cert verify message) and finished messages | ||
| 148 | * (so we can compute our own finished message). | ||
| 149 | */ | ||
| 150 | void digestNow() { | ||
| 151 | r.doHashes(); | ||
| 152 | } | ||
| 153 | |||
| 154 | /* | ||
| 155 | * Do more than skip that handshake data ... totally ignore it. | ||
| 156 | * The difference is that the data does not get hashed. | ||
| 157 | */ | ||
| 158 | void ignore(int n) { | ||
| 159 | r.ignore(n); | ||
| 160 | } | ||
| 161 | |||
| 162 | |||
| 163 | // Message parsing methods | ||
| 164 | |||
| 165 | /* | ||
| 166 | * Read 8, 16, 24, and 32 bit SSL integer data types, encoded | ||
| 167 | * in standard big-endian form. | ||
| 168 | */ | ||
| 169 | |||
| 170 | int getInt8() throws IOException { | ||
| 171 | return read(); | ||
| 172 | } | ||
| 173 | |||
| 174 | int getInt16() throws IOException { | ||
| 175 | return (getInt8() << 8) | getInt8(); | ||
| 176 | } | ||
| 177 | |||
| 178 | int getInt24() throws IOException { | ||
| 179 | return (getInt8() << 16) | (getInt8() << 8) | getInt8(); | ||
| 180 | } | ||
| 181 | |||
| 182 | int getInt32() throws IOException { | ||
| 183 | return (getInt8() << 24) | (getInt8() << 16) | ||
| 184 | | (getInt8() << 8) | getInt8(); | ||
| 185 | } | ||
| 186 | |||
| 187 | /* | ||
| 188 | * Read byte vectors with 8, 16, and 24 bit length encodings. | ||
| 189 | */ | ||
| 190 | |||
| 191 | byte[] getBytes8() throws IOException { | ||
| 192 | int len = getInt8(); | ||
| 193 | byte b[] = new byte[len]; | ||
| 194 | |||
| 195 | read(b, 0, len); | ||
| 196 | return b; | ||
| 197 | } | ||
| 198 | |||
| 199 | public byte[] getBytes16() throws IOException { | ||
| 200 | int len = getInt16(); | ||
| 201 | byte b[] = new byte[len]; | ||
| 202 | |||
| 203 | read(b, 0, len); | ||
| 204 | return b; | ||
| 205 | } | ||
| 206 | |||
| 207 | byte[] getBytes24() throws IOException { | ||
| 208 | int len = getInt24(); | ||
| 209 | byte b[] = new byte[len]; | ||
| 210 | |||
| 211 | read(b, 0, len); | ||
| 212 | return b; | ||
| 213 | } | ||
| 214 | |||
| 215 | } | ||