1 /* |
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2 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.security.ssl; |
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27 |
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28 import java.io.IOException; |
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29 import java.io.PrintStream; |
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30 import java.security.AccessController; |
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31 import java.security.AccessControlContext; |
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32 import java.security.Principal; |
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33 import java.security.PrivilegedAction; |
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34 import java.security.SecureRandom; |
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35 import javax.crypto.SecretKey; |
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36 |
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37 /** |
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38 * A helper class that calls the KerberosClientKeyExchange implementation. |
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39 */ |
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40 public class KerberosClientKeyExchange extends HandshakeMessage { |
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41 |
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42 private static final String IMPL_CLASS = |
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43 "sun.security.ssl.krb5.KerberosClientKeyExchangeImpl"; |
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44 |
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45 private static final Class<?> implClass = AccessController.doPrivileged( |
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46 new PrivilegedAction<Class<?>>() { |
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47 @Override |
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48 public Class<?> run() { |
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49 try { |
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50 return Class.forName(IMPL_CLASS, true, null); |
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51 } catch (ClassNotFoundException cnf) { |
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52 return null; |
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53 } |
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54 } |
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55 } |
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56 ); |
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57 private final KerberosClientKeyExchange impl = createImpl(); |
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58 |
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59 private KerberosClientKeyExchange createImpl() { |
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60 if (implClass != null && |
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61 getClass() == KerberosClientKeyExchange.class) { |
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62 try { |
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63 return (KerberosClientKeyExchange)implClass.newInstance(); |
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64 } catch (InstantiationException e) { |
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65 throw new AssertionError(e); |
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66 } catch (IllegalAccessException e) { |
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67 throw new AssertionError(e); |
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68 } |
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69 } |
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70 return null; |
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71 } |
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72 |
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73 // This constructor will be called when constructing an instance of its |
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74 // subclass -- KerberosClientKeyExchangeImpl. Please won't check the |
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75 // value of impl variable in this constructor. |
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76 protected KerberosClientKeyExchange() { |
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77 // please won't check the value of impl variable |
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78 } |
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79 |
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80 public KerberosClientKeyExchange(String serverName, |
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81 AccessControlContext acc, ProtocolVersion protocolVersion, |
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82 SecureRandom rand) throws IOException { |
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83 |
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84 if (impl != null) { |
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85 init(serverName, acc, protocolVersion, rand); |
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86 } else { |
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87 throw new IllegalStateException("Kerberos is unavailable"); |
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88 } |
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89 } |
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90 |
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91 public KerberosClientKeyExchange(ProtocolVersion protocolVersion, |
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92 ProtocolVersion clientVersion, SecureRandom rand, |
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93 HandshakeInStream input, AccessControlContext acc, |
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94 Object serverKeys) throws IOException { |
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95 |
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96 if (impl != null) { |
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97 init(protocolVersion, clientVersion, rand, input, acc, serverKeys); |
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98 } else { |
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99 throw new IllegalStateException("Kerberos is unavailable"); |
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100 } |
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101 } |
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102 |
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103 @Override |
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104 int messageType() { |
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105 return ht_client_key_exchange; |
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106 } |
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107 |
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108 @Override |
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109 public int messageLength() { |
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110 return impl.messageLength(); |
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111 } |
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112 |
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113 @Override |
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114 public void send(HandshakeOutStream s) throws IOException { |
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115 impl.send(s); |
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116 } |
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117 |
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118 @Override |
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119 public void print(PrintStream p) throws IOException { |
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120 impl.print(p); |
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121 } |
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122 |
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123 public void init(String serverName, |
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124 AccessControlContext acc, ProtocolVersion protocolVersion, |
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125 SecureRandom rand) throws IOException { |
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126 |
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127 if (impl != null) { |
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128 impl.init(serverName, acc, protocolVersion, rand); |
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129 } |
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130 } |
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131 |
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132 public void init(ProtocolVersion protocolVersion, |
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133 ProtocolVersion clientVersion, SecureRandom rand, |
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134 HandshakeInStream input, AccessControlContext acc, |
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135 Object ServiceCreds) throws IOException { |
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136 |
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137 if (impl != null) { |
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138 impl.init(protocolVersion, clientVersion, |
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139 rand, input, acc, ServiceCreds); |
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140 } |
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141 } |
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142 |
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143 public byte[] getUnencryptedPreMasterSecret() { |
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144 return impl.getUnencryptedPreMasterSecret(); |
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145 } |
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146 |
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147 public Principal getPeerPrincipal(){ |
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148 return impl.getPeerPrincipal(); |
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149 } |
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150 |
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151 public Principal getLocalPrincipal(){ |
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152 return impl.getLocalPrincipal(); |
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153 } |
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154 } |
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