/* * Copyright (c) 1996, 2010, 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;  /** * SSL/TLS records, as pulled off (and put onto) a TCP stream.  This is * the base interface, which defines common information and interfaces * used by both Input and Output records. * * @author David Brownell */interface Record {    /*     * There are four SSL record types, which are part of the interface     * to this level (along with the maximum record size)     *     * enum { change_cipher_spec(20), alert(21), handshake(22),     *      application_data(23), (255) } ContentType;     */    static final byte   ct_change_cipher_spec = 20;    static final byte   ct_alert = 21;    static final byte   ct_handshake = 22;    static final byte   ct_application_data = 23;     static final int    headerSize = 5;         // SSLv3 record header    static final int    maxExpansion = 1024;    // for bad compression    static final int    trailerSize = 20;       // SHA1 hash size    static final int    maxDataSize = 16384;    // 2^14 bytes of data    static final int    maxPadding = 256;       // block cipher padding    static final int    maxIVLength = 256;      // block length     /*     * SSL has a maximum record size.  It's header, (compressed) data,     * padding, and a trailer for the MAC.     * Some compression algorithms have rare cases where they expand the data.     * As we don't support compression at this time, leave that out.     */    static final int    maxRecordSize =                                      headerSize        // header                                    + maxIVLength       // iv                                    + maxDataSize       // data                                    + maxPadding        // padding                                    + trailerSize;      // MAC     /*     * The maximum large record size.     *     * Some SSL/TLS implementations support large fragment upto 2^15 bytes,     * such as Microsoft. We support large incoming fragments.     *     * The maximum large record size is defined as maxRecordSize plus 2^14,     * this is the amount OpenSSL is using.     */    static final int    maxLargeRecordSize =                maxRecordSize   // Max size with a conforming implemenation              + maxDataSize;    // extra 2^14 bytes for large data packets.      /*     * Maximum record size for alert and change cipher spec records.     * They only contain 2 and 1 bytes of data, respectively.     * Allocate a smaller array.     */    static final int    maxAlertRecordSize =                                      headerSize        // header                                    + maxIVLength       // iv                                    + 2                 // alert                                    + maxPadding        // padding                                    + trailerSize;      // MAC }