| /* Extension.java -- A TLS hello extension. |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is a part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or (at |
| your option) any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 |
| USA |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.javax.net.ssl.provider; |
| |
| import java.io.EOFException; |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.io.PrintWriter; |
| import java.io.StringWriter; |
| |
| final class Extension implements Constructed |
| { |
| |
| // Fields. |
| // ------------------------------------------------------------------------- |
| |
| private final Type type; |
| private final byte[] value; |
| |
| // Constructor. |
| // ------------------------------------------------------------------------- |
| |
| Extension(Type type, byte[] value) |
| { |
| if (type == null || value == null) |
| { |
| throw new NullPointerException(); |
| } |
| this.type = type; |
| this.value = value; |
| } |
| |
| // Class method. |
| // ------------------------------------------------------------------------- |
| |
| static Extension read(InputStream in) throws IOException |
| { |
| Type t = Type.read(in); |
| int len = (in.read() & 0xFF) << 8 | (in.read() & 0xFF); |
| byte[] v = new byte[len]; |
| int count = 0; |
| while (count < len) |
| { |
| int l = in.read(v, count, len - count); |
| if (l == -1) |
| { |
| throw new EOFException("unexpected end of extension"); |
| } |
| count += l; |
| } |
| return new Extension(t, v); |
| } |
| |
| // Instance methods. |
| // ------------------------------------------------------------------------- |
| |
| public void write(OutputStream out) throws IOException |
| { |
| out.write(type.getEncoded()); |
| out.write(value.length >>> 8 & 0xFF); |
| out.write(value.length & 0xFF); |
| out.write(value); |
| } |
| |
| Type getType() |
| { |
| return type; |
| } |
| |
| byte[] getValue() |
| { |
| return value; |
| } |
| |
| public String toString() |
| { |
| StringWriter str = new StringWriter(); |
| PrintWriter out = new PrintWriter(str); |
| out.println("struct {"); |
| out.println(" type = " + type + ";"); |
| out.println(" value ="); |
| out.println(Util.hexDump(value, " ")); |
| out.println("} Extension;"); |
| return str.toString(); |
| } |
| |
| // Inner class. |
| // ------------------------------------------------------------------------- |
| |
| static final class Type implements Enumerated |
| { |
| |
| // Constants and fields. |
| // ----------------------------------------------------------------------- |
| |
| static final Type SERVER_NAME = new Type(0); |
| static final Type MAX_FRAGMENT_LENGTH = new Type(1); |
| static final Type CLIENT_CERTIFICATE_URL = new Type(2); |
| static final Type TRUSTED_CA_KEYS = new Type(3); |
| static final Type TRUNCATED_HMAC = new Type(4); |
| static final Type STATUS_REQUEST = new Type(5); |
| static final Type SRP = new Type(6); |
| static final Type CERT_TYPE = new Type(7); |
| |
| private final int value; |
| |
| // Constructor. |
| // ----------------------------------------------------------------------- |
| |
| private Type(int value) |
| { |
| this.value = value; |
| } |
| |
| // Class methods. |
| // ----------------------------------------------------------------------- |
| |
| static Type read(InputStream in) throws IOException |
| { |
| int i = in.read(); |
| if (i == -1) |
| { |
| throw new EOFException("unexpected end of input stream"); |
| } |
| int value = (i & 0xFF) << 8; |
| i = in.read(); |
| if (i == -1) |
| { |
| throw new EOFException("unexpected end of input stream"); |
| } |
| value |= i & 0xFF; |
| switch (value) |
| { |
| case 0: return SERVER_NAME; |
| case 1: return MAX_FRAGMENT_LENGTH; |
| case 2: return CLIENT_CERTIFICATE_URL; |
| case 3: return TRUSTED_CA_KEYS; |
| case 4: return TRUNCATED_HMAC; |
| case 5: return STATUS_REQUEST; |
| case 6: return SRP; |
| case 7: return CERT_TYPE; |
| default: return new Type(value); |
| } |
| } |
| |
| // Instance methods. |
| // ----------------------------------------------------------------------- |
| |
| public byte[] getEncoded() |
| { |
| return new byte[] { |
| (byte) (value >>> 8 & 0xFF), (byte) (value & 0xFF) |
| }; |
| } |
| |
| public int getValue() |
| { |
| return value; |
| } |
| |
| public String toString() |
| { |
| switch (value) |
| { |
| case 0: return "server_name"; |
| case 1: return "max_fragment_length"; |
| case 2: return "client_certificate_url"; |
| case 3: return "trusted_ca_keys"; |
| case 4: return "truncated_hmac"; |
| case 5: return "status_request"; |
| case 6: return "srp"; |
| case 7: return "cert_type"; |
| default: return "unknown(" + value + ")"; |
| } |
| } |
| } |
| } |