--- /dev/null Fri May 29 00:48:46 2015 +++ new/src/java.base/share/classes/sun/security/ssl/DTLSRecord.java Fri May 29 00:48:45 2015 @@ -0,0 +1,87 @@ +/* + * Copyright (c) 1996, 2015, 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 + +}