1 /*

     2  * Copyright (c) 2006, 2012, 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 package sun.security.ssl;

    27 

    28 import java.io.IOException;

    29 

    30 import javax.net.ssl.SSLProtocolException;

    31 

    32 /*

    33  * For secure renegotiation, RFC5746 defines a new TLS extension,

    34  * "renegotiation_info" (with extension type 0xff01), which contains a

    35  * cryptographic binding to the enclosing TLS connection (if any) for

    36  * which the renegotiation is being performed.  The "extension data"

    37  * field of this extension contains a "RenegotiationInfo" structure:

    38  *

    39  *      struct {

    40  *          opaque renegotiated_connection<0..255>;

    41  *      } RenegotiationInfo;

    42  */

    43 final class RenegotiationInfoExtension extends HelloExtension {

    44     private final byte[] renegotiated_connection;

    45 

    46     RenegotiationInfoExtension(byte[] clientVerifyData,

    47                 byte[] serverVerifyData) {

    48         super(ExtensionType.EXT_RENEGOTIATION_INFO);

    49 

    50         if (clientVerifyData.length != 0) {

    51             renegotiated_connection =

    52                     new byte[clientVerifyData.length + serverVerifyData.length];

    53             System.arraycopy(clientVerifyData, 0, renegotiated_connection,

    54                     0, clientVerifyData.length);

    55 

    56             if (serverVerifyData.length != 0) {

    57                 System.arraycopy(serverVerifyData, 0, renegotiated_connection,

    58                         clientVerifyData.length, serverVerifyData.length);

    59             }

    60         } else {

    61             // ignore both the client and server verify data.

    62             renegotiated_connection = new byte[0];

    63         }

    64     }

    65 

    66     RenegotiationInfoExtension(HandshakeInStream s, int len)

    67                 throws IOException {

    68         super(ExtensionType.EXT_RENEGOTIATION_INFO);

    69 

    70         // check the extension length

    71         if (len < 1) {

    72             throw new SSLProtocolException("Invalid " + type + " extension");

    73         }

    74 

    75         int renegoInfoDataLen = s.getInt8();

    76         if (renegoInfoDataLen + 1 != len) {  // + 1 = the byte we just read

    77             throw new SSLProtocolException("Invalid " + type + " extension");

    78         }

    79 

    80         renegotiated_connection = new byte[renegoInfoDataLen];

    81         if (renegoInfoDataLen != 0) {

    82             s.read(renegotiated_connection, 0, renegoInfoDataLen);

    83         }

    84     }

    85 

    86 

    87     // Length of the encoded extension, including the type and length fields

    88     @Override

    89     int length() {

    90         return 5 + renegotiated_connection.length;

    91     }

    92 

    93     @Override

    94     void send(HandshakeOutStream s) throws IOException {

    95         s.putInt16(type.id);

    96         s.putInt16(renegotiated_connection.length + 1);

    97         s.putBytes8(renegotiated_connection);

    98     }

    99 

   100     boolean isEmpty() {

   101         return renegotiated_connection.length == 0;

   102     }

   103 

   104     byte[] getRenegotiatedConnection() {

   105         return renegotiated_connection;

   106     }

   107 

   108     @Override

   109     public String toString() {

   110         return "Extension " + type + ", renegotiated_connection: " +

   111                     (renegotiated_connection.length == 0 ? "<empty>" :

   112                     Debug.toString(renegotiated_connection));

   113     }

   114 

   115 }