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1: /* ClientPSKParameters.java -- 2: Copyright (C) 2006 Free Software Foundation, Inc. 3: 4: This file is a part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2 of the License, or (at 9: your option) any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; if not, write to the Free Software 18: Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 19: USA 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package gnu.javax.net.ssl.provider; 40: 41: import gnu.classpath.debug.Component; 42: import gnu.classpath.debug.SystemLogger; 43: 44: import java.io.PrintWriter; 45: import java.io.StringWriter; 46: import java.nio.ByteBuffer; 47: import java.nio.ByteOrder; 48: import java.nio.CharBuffer; 49: import java.nio.charset.Charset; 50: 51: /** 52: * <pre> 53: struct { 54: select (KeyExchangeAlgorithm) { 55: /* other cases for rsa, diffie_hellman, etc. */ 56: case psk: /* NEW */ 57: opaque psk_identity<0..2^16-1>; 58: } exchange_keys; 59: } ClientKeyExchange;</pre> 60: * 61: * @author Casey Marshall (csm@gnu.org) 62: */ 63: public class ClientPSKParameters extends ExchangeKeys implements Builder, Constructed 64: { 65: public ClientPSKParameters(ByteBuffer buffer) 66: { 67: super(buffer); 68: } 69: 70: public ClientPSKParameters(String identity) 71: { 72: super(null); 73: Charset utf8 = Charset.forName("UTF-8"); 74: ByteBuffer idBuf = utf8.encode(CharBuffer.wrap(identity)); 75: buffer = ByteBuffer.allocate(idBuf.remaining() + 2); 76: buffer.putShort((short) idBuf.remaining()); 77: buffer.put(idBuf); 78: buffer.rewind(); 79: } 80: 81: /* (non-Javadoc) 82: * @see gnu.javax.net.ssl.provider.Builder#buffer() 83: */ 84: public ByteBuffer buffer() 85: { 86: return (ByteBuffer) buffer.duplicate().rewind().limit(length()); 87: } 88: 89: /* (non-Javadoc) 90: * @see gnu.javax.net.ssl.provider.Constructed#length() 91: */ 92: public int length() 93: { 94: return (buffer.getShort(0) & 0xFFFF) + 2; 95: } 96: 97: public String identity() 98: { 99: Charset utf8 = Charset.forName("UTF-8"); 100: return utf8.decode((ByteBuffer) buffer.duplicate().position(2).limit(length())).toString(); 101: } 102: 103: public @Override String toString() 104: { 105: return toString(null); 106: } 107: 108: /* (non-Javadoc) 109: * @see gnu.javax.net.ssl.provider.Constructed#toString(java.lang.String) 110: */ 111: public String toString(String prefix) 112: { 113: StringWriter str = new StringWriter(); 114: PrintWriter out = new PrintWriter(str); 115: if (prefix != null) out.print(prefix); 116: out.println("struct {"); 117: if (prefix != null) out.print(prefix); 118: out.print(" identity = "); 119: out.print(identity()); 120: out.println(";"); 121: if (prefix != null) out.print(prefix); 122: out.print("} ClientPSKParameters;"); 123: return str.toString(); 124: } 125: }