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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package libcore.tlswire.handshake;
import libcore.tlswire.util.IoUtils;
import libcore.util.HexEncoding;
import java.io.DataInput;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* {@code HelloExtension} struct from TLS 1.2 RFC 5246.
*/
public class HelloExtension {
public static final int TYPE_SERVER_NAME = 0;
public static final int TYPE_PADDING = 21;
public static final int TYPE_SESSION_TICKET = 35;
public static final int TYPE_RENEGOTIATION_INFO = 65281;
private static final Map<Integer, String> TYPE_TO_NAME = new HashMap<Integer, String>();
static {
TYPE_TO_NAME.put(TYPE_SERVER_NAME, "server_name");
TYPE_TO_NAME.put(1, "max_fragment_length");
TYPE_TO_NAME.put(2, "client_certificate_url");
TYPE_TO_NAME.put(3, "trusted_ca_keys");
TYPE_TO_NAME.put(4, "truncated_hmac");
TYPE_TO_NAME.put(5, "status_request");
TYPE_TO_NAME.put(6, "user_mapping");
TYPE_TO_NAME.put(7, "client_authz");
TYPE_TO_NAME.put(8, "server_authz");
TYPE_TO_NAME.put(9, "cert_type");
TYPE_TO_NAME.put(10, "elliptic_curves");
TYPE_TO_NAME.put(11, "ec_point_formats");
TYPE_TO_NAME.put(12, "srp");
TYPE_TO_NAME.put(13, "signature_algorithms");
TYPE_TO_NAME.put(14, "use_srtp");
TYPE_TO_NAME.put(15, "heartbeat");
TYPE_TO_NAME.put(16, "application_layer_protocol_negotiation");
TYPE_TO_NAME.put(17, "status_request_v2");
TYPE_TO_NAME.put(18, "signed_certificate_timestamp");
TYPE_TO_NAME.put(19, "client_certificate_type");
TYPE_TO_NAME.put(20, "server_certificate_type");
TYPE_TO_NAME.put(TYPE_PADDING, "padding");
TYPE_TO_NAME.put(TYPE_SESSION_TICKET, "SessionTicket");
TYPE_TO_NAME.put(13172, "next_protocol_negotiation");
TYPE_TO_NAME.put(30031, "Channel ID (old)");
TYPE_TO_NAME.put(30032, "Channel ID (new)");
TYPE_TO_NAME.put(TYPE_RENEGOTIATION_INFO, "renegotiation_info");
}
public int type;
public String name;
public byte[] data;
public static HelloExtension read(DataInput in) throws IOException {
int type = in.readUnsignedShort();
HelloExtension result;
switch (type) {
case TYPE_SERVER_NAME:
result = new ServerNameHelloExtension();
break;
default:
result = new HelloExtension();
break;
}
result.type = type;
result.name = TYPE_TO_NAME.get(result.type);
if (result.name == null) {
result.name = String.valueOf(result.type);
}
result.data = IoUtils.readTlsVariableLengthByteVector(in, 0xffff);
result.parseData();
return result;
}
/**
* @throws IOException
*/
protected void parseData() throws IOException {}
@Override
public String toString() {
return "HelloExtension{type: " + name + ", data: " + HexEncoding.encode(data) + "}";
}
}
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