| /* |
| * Copyright (c) 1996, 2016, 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; |
| |
| /** |
| * DTLS record |
| */ |
| interface DTLSRecord extends Record { |
| |
| static final int headerSize = 13; // DTLS record header |
| |
| static final int handshakeHeaderSize = 12; // DTLS handshake header |
| |
| /* |
| * The size of the header plus the max IV length |
| */ |
| static final int headerPlusMaxIVSize = |
| headerSize // header |
| + maxIVLength; // iv |
| |
| /* |
| * The maximum size that may be increased when translating plaintext to |
| * ciphertext fragment. |
| */ |
| static final int maxPlaintextPlusSize = |
| headerSize // header |
| + maxIVLength // iv |
| + maxMacSize // MAC or AEAD tag |
| + maxPadding; // block cipher padding |
| |
| /* |
| * the maximum record size |
| */ |
| static final int maxRecordSize = |
| headerPlusMaxIVSize // header + iv |
| + maxDataSize // data |
| + maxPadding // padding |
| + maxMacSize; // MAC or AEAD tag |
| |
| /* |
| * For CBC protection in SSL3/TLS1, we break some plaintext into two |
| * packets. Max application data size for the second packet. |
| */ |
| static final int maxDataSizeMinusOneByteRecord = |
| maxDataSize // max data size |
| - ( // max one byte record size |
| headerPlusMaxIVSize // header + iv |
| + 1 // one byte data |
| + maxPadding // padding |
| + maxMacSize // MAC |
| ); |
| |
| /* |
| * 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 = |
| headerPlusMaxIVSize // header + iv |
| + 2 // alert |
| + maxPadding // padding |
| + maxMacSize; // MAC |
| |
| /* |
| * Minimum record size of Certificate handshake message. |
| * Client sends a certificate message containing no certificates if no |
| * suitable certificate is available. That is, the certificate_list |
| * structure has a length of zero. |
| * |
| * struct { |
| * ASN.1Cert certificate_list<0..2^24-1>; |
| * } Certificate; |
| */ |
| static final int minCertPlaintextSize = |
| headerSize // record header |
| + handshakeHeaderSize // handshake header |
| + 3; // cert list length |
| } |