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1: /* ServerDHE_PSKParameters.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.charset.Charset; 49: 50: /** 51: * <pre> 52: struct { 53: select (KeyExchangeAlgorithm) { 54: /* other cases for rsa, diffie_hellman, etc. */ 55: case diffie_hellman_psk: /* NEW */ 56: opaque psk_identity_hint<0..2^16-1>; 57: ServerDHParams params; 58: }; 59: } ServerKeyExchange;</pre> 60: * 61: * @author Casey Marshall (csm@gnu.org) 62: */ 63: public class ServerDHE_PSKParameters implements Constructed, Builder, ServerKeyExchangeParams 64: { 65: private ByteBuffer buffer; 66: 67: public ServerDHE_PSKParameters(ByteBuffer buffer) 68: { 69: this.buffer = buffer.duplicate().order(ByteOrder.BIG_ENDIAN); 70: } 71: 72: public ServerDHE_PSKParameters(String identityHint, ServerDHParams dhParams) 73: { 74: this(identityHint, dhParams.buffer()); 75: } 76: 77: public ServerDHE_PSKParameters(String identityHint, ByteBuffer dhParams) 78: { 79: Charset utf8 = Charset.forName("UTF-8"); 80: ByteBuffer hintBuf = utf8.encode(identityHint); 81: buffer = ByteBuffer.allocate(2 + hintBuf.remaining() + dhParams.remaining()); 82: buffer.putShort((short) hintBuf.remaining()); 83: buffer.put(hintBuf); 84: buffer.put(dhParams); 85: } 86: 87: public KeyExchangeAlgorithm algorithm() 88: { 89: return KeyExchangeAlgorithm.DHE_PSK; 90: } 91: 92: /* (non-Javadoc) 93: * @see gnu.javax.net.ssl.provider.Constructed#length() 94: */ 95: public int length() 96: { 97: return (buffer.getShort(0) & 0xFFFF) + 2 + params().length(); 98: } 99: 100: private int hintLength() 101: { 102: return (buffer.getShort(0) & 0xFFFF) + 2; 103: } 104: 105: public String identityHint() 106: { 107: Charset utf8 = Charset.forName("UTF-8"); 108: return utf8.decode((ByteBuffer) buffer.duplicate().position(2).limit 109: (hintLength())).toString(); 110: } 111: 112: public ServerDHParams params() 113: { 114: return new ServerDHParams(((ByteBuffer) buffer.duplicate().position 115: (hintLength()).limit(buffer.capacity())).slice()); 116: } 117: 118: /* (non-Javadoc) 119: * @see gnu.javax.net.ssl.provider.Builder#buffer() 120: */ 121: public ByteBuffer buffer() 122: { 123: return (ByteBuffer) buffer.duplicate().rewind().limit(length()); 124: } 125: 126: public @Override String toString() 127: { 128: return toString(null); 129: } 130: 131: /* (non-Javadoc) 132: * @see gnu.javax.net.ssl.provider.Constructed#toString(java.lang.String) 133: */ 134: public String toString(String prefix) 135: { 136: StringWriter str = new StringWriter(); 137: PrintWriter out = new PrintWriter(str); 138: if (prefix != null) out.print(prefix); 139: out.println("struct {"); 140: if (prefix != null) out.print(prefix); 141: out.print(" identity_hint = "); 142: out.print(identityHint()); 143: out.println(";"); 144: if (prefix != null) out.print(prefix); 145: out.println(" params ="); 146: out.println(params().toString(prefix != null ? prefix + " " : " ")); 147: if (prefix != null) out.print(prefix); 148: out.print("} ServerDHE_PSKParameters;"); 149: return str.toString(); 150: } 151: }