| /* |
| * Copyright (c) 1996, 2018, 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. |
| */ |
| |
| package sun.security.ssl; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import javax.net.ssl.SSLException; |
| |
| /** |
| * SSL/(D)TLS record. |
| * |
| * This is the base interface, which defines common information and interfaces |
| * used by both Input and Output records. |
| * |
| * @author David Brownell |
| */ |
| interface Record { |
| static final int maxMacSize = 48; // the max supported MAC or |
| // AEAD tag size |
| static final int maxDataSize = 16384; // 2^14 bytes of data |
| static final int maxPadding = 256; // block cipher padding |
| static final int maxIVLength = 16; // the max supported IV length |
| |
| static final int maxFragmentSize = 18432; // the max fragment size |
| // 2^14 + 2048 |
| |
| /* |
| * System property to enable/disable CBC protection in SSL3/TLS1. |
| */ |
| static final boolean enableCBCProtection = |
| Utilities.getBooleanProperty("jsse.enableCBCProtection", true); |
| |
| /* |
| * The overflow values of integers of 8, 16 and 24 bits. |
| */ |
| static final int OVERFLOW_OF_INT08 = (0x01 << 8); |
| static final int OVERFLOW_OF_INT16 = (0x01 << 16); |
| static final int OVERFLOW_OF_INT24 = (0x01 << 24); |
| |
| /* |
| * Read 8, 16, 24, and 32 bit integer data types, encoded |
| * in standard big-endian form. |
| */ |
| static int getInt8(ByteBuffer m) throws IOException { |
| verifyLength(m, 1); |
| return (m.get() & 0xFF); |
| } |
| |
| static int getInt16(ByteBuffer m) throws IOException { |
| verifyLength(m, 2); |
| return ((m.get() & 0xFF) << 8) | |
| (m.get() & 0xFF); |
| } |
| |
| static int getInt24(ByteBuffer m) throws IOException { |
| verifyLength(m, 3); |
| return ((m.get() & 0xFF) << 16) | |
| ((m.get() & 0xFF) << 8) | |
| (m.get() & 0xFF); |
| } |
| |
| static int getInt32(ByteBuffer m) throws IOException { |
| verifyLength(m, 4); |
| return ((m.get() & 0xFF) << 24) | |
| ((m.get() & 0xFF) << 16) | |
| ((m.get() & 0xFF) << 8) | |
| (m.get() & 0xFF); |
| } |
| |
| /* |
| * Read byte vectors with 8, 16, and 24 bit length encodings. |
| */ |
| static byte[] getBytes8(ByteBuffer m) throws IOException { |
| int len = Record.getInt8(m); |
| verifyLength(m, len); |
| byte[] b = new byte[len]; |
| |
| m.get(b); |
| return b; |
| } |
| |
| static byte[] getBytes16(ByteBuffer m) throws IOException { |
| int len = Record.getInt16(m); |
| verifyLength(m, len); |
| byte[] b = new byte[len]; |
| |
| m.get(b); |
| return b; |
| } |
| |
| static byte[] getBytes24(ByteBuffer m) throws IOException { |
| int len = Record.getInt24(m); |
| verifyLength(m, len); |
| byte[] b = new byte[len]; |
| |
| m.get(b); |
| return b; |
| } |
| |
| /* |
| * Write 8, 16, 24, and 32 bit integer data types, encoded |
| * in standard big-endian form. |
| */ |
| static void putInt8(ByteBuffer m, int i) throws IOException { |
| verifyLength(m, 1); |
| m.put((byte)(i & 0xFF)); |
| } |
| |
| static void putInt16(ByteBuffer m, int i) throws IOException { |
| verifyLength(m, 2); |
| m.put((byte)((i >> 8) & 0xFF)); |
| m.put((byte)(i & 0xFF)); |
| } |
| |
| static void putInt24(ByteBuffer m, int i) throws IOException { |
| verifyLength(m, 3); |
| m.put((byte)((i >> 16) & 0xFF)); |
| m.put((byte)((i >> 8) & 0xFF)); |
| m.put((byte)(i & 0xFF)); |
| } |
| |
| static void putInt32(ByteBuffer m, int i) throws IOException { |
| m.put((byte)((i >> 24) & 0xFF)); |
| m.put((byte)((i >> 16) & 0xFF)); |
| m.put((byte)((i >> 8) & 0xFF)); |
| m.put((byte)(i & 0xFF)); |
| } |
| |
| /* |
| * Write byte vectors with 8, 16, and 24 bit length encodings. |
| */ |
| static void putBytes8(ByteBuffer m, byte[] s) throws IOException { |
| if (s == null || s.length == 0) { |
| verifyLength(m, 1); |
| putInt8(m, 0); |
| } else { |
| verifyLength(m, 1 + s.length); |
| putInt8(m, s.length); |
| m.put(s); |
| } |
| } |
| |
| static void putBytes16(ByteBuffer m, byte[] s) throws IOException { |
| if (s == null || s.length == 0) { |
| verifyLength(m, 2); |
| putInt16(m, 0); |
| } else { |
| verifyLength(m, 2 + s.length); |
| putInt16(m, s.length); |
| m.put(s); |
| } |
| } |
| |
| static void putBytes24(ByteBuffer m, byte[] s) throws IOException { |
| if (s == null || s.length == 0) { |
| verifyLength(m, 3); |
| putInt24(m, 0); |
| } else { |
| verifyLength(m, 3 + s.length); |
| putInt24(m, s.length); |
| m.put(s); |
| } |
| } |
| |
| // Verify that the buffer has sufficient remaining. |
| static void verifyLength( |
| ByteBuffer m, int len) throws SSLException { |
| if (len > m.remaining()) { |
| throw new SSLException("Insufficient space in the buffer, " + |
| "may be cause by an unexpected end of handshake data."); |
| } |
| } |
| } |