001/* TrustManagerFactory.java -- factory for trust managers. 002 Copyright (C) 2004 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package javax.net.ssl; 040 041import gnu.java.security.Engine; 042 043import java.lang.reflect.InvocationTargetException; 044import java.security.AccessController; 045import java.security.InvalidAlgorithmParameterException; 046import java.security.KeyStore; 047import java.security.KeyStoreException; 048import java.security.NoSuchAlgorithmException; 049import java.security.NoSuchProviderException; 050import java.security.PrivilegedAction; 051import java.security.Provider; 052import java.security.Security; 053 054/** 055 * A factory for creating trust manager objects. 056 */ 057public class TrustManagerFactory 058{ 059 060 // Constants and fields. 061 // ------------------------------------------------------------------------- 062 063 /** The service name for trust manager factories. */ 064 private static final String TRUST_MANAGER_FACTORY = "TrustManagerFactory"; 065 066 /** The system default trust manager algorithm. */ 067 private static final String DEFAULT_ALGORITHM = "JessieX509"; 068 069 /** The underlying engine class. */ 070 private final TrustManagerFactorySpi tmfSpi; 071 072 /** The provider of the engine class. */ 073 private final Provider provider; 074 075 /** The name of this trust manager algorithm. */ 076 private final String algorithm; 077 078 // Constructor. 079 // ------------------------------------------------------------------------- 080 081 /** 082 * Creates a new trust manager factory. 083 * 084 * @param tmfSpi The underlying engine class. 085 * @param provider The provider of the engine class. 086 * @param algorithm The trust manager algorithm name. 087 */ 088 protected TrustManagerFactory(TrustManagerFactorySpi tmfSpi, 089 Provider provider, String algorithm) 090 { 091 this.tmfSpi = tmfSpi; 092 this.provider = provider; 093 this.algorithm = algorithm; 094 } 095 096 /** 097 * Returns an instance of a trust manager factory for the given algorithm from 098 * the first provider that implements it. 099 * 100 * @param algorithm The name of the algorithm to get. 101 * @return The instance of the trust manager factory. 102 * @throws NoSuchAlgorithmException If no provider implements the given 103 * algorithm. 104 * @throws IllegalArgumentException if <code>algorithm</code> is 105 * <code>null</code> or is an empty string. 106 */ 107 public static final TrustManagerFactory getInstance(String algorithm) 108 throws NoSuchAlgorithmException 109 { 110 Provider[] p = Security.getProviders(); 111 NoSuchAlgorithmException lastException = null; 112 for (int i = 0; i < p.length; i++) 113 try 114 { 115 return getInstance(algorithm, p[i]); 116 } 117 catch (NoSuchAlgorithmException x) 118 { 119 lastException = x; 120 } 121 if (lastException != null) 122 throw lastException; 123 throw new NoSuchAlgorithmException(algorithm); 124 } 125 126 /** 127 * Returns an instance of a trust manager factory for the given algorithm from 128 * the named provider. 129 * 130 * @param algorithm The name of the algorithm to get. 131 * @param provider The name of the provider to get the instance from. 132 * @return The instance of the trust manager factory. 133 * @throws NoSuchAlgorithmException If the provider does not implement the 134 * given algorithm. 135 * @throws NoSuchProviderException If there is no such named provider. 136 * @throws IllegalArgumentException if either <code>algorithm</code> or 137 * <code>provider</code> is <code>null</code>, or if 138 * <code>algorithm</code> is an empty string. 139 */ 140 public static final TrustManagerFactory getInstance(String algorithm, 141 String provider) 142 throws NoSuchAlgorithmException, NoSuchProviderException 143 { 144 if (provider == null) 145 throw new IllegalArgumentException("provider MUST NOT be null"); 146 Provider p = Security.getProvider(provider); 147 if (p == null) 148 throw new NoSuchProviderException(provider); 149 return getInstance(algorithm, p); 150 } 151 152 /** 153 * Returns an instance of a trust manager factory for the given algorithm from 154 * the specified provider. 155 * 156 * @param algorithm The name of the algorithm to get. 157 * @param provider The provider to get the instance from. 158 * @return The instance of the trust manager factory. 159 * @throws NoSuchAlgorithmException If the provider does not implement the 160 * given algorithm. 161 * @throws IllegalArgumentException if either <code>algorithm</code> or 162 * <code>provider</code> is <code>null</code>, or if 163 * <code>algorithm</code> is an empty string. 164 */ 165 public static final TrustManagerFactory getInstance(String algorithm, 166 Provider provider) 167 throws NoSuchAlgorithmException 168 { 169 StringBuilder sb = new StringBuilder("TrustManagerFactory algorithm [") 170 .append(algorithm).append("] from provider[") 171 .append(provider).append("] could not be created"); 172 Throwable cause; 173 try 174 { 175 Object spi = Engine.getInstance(TRUST_MANAGER_FACTORY, algorithm, provider); 176 return new TrustManagerFactory((TrustManagerFactorySpi) spi, 177 provider, 178 algorithm); 179 } 180 catch (InvocationTargetException x) 181 { 182 cause = x.getCause(); 183 if (cause instanceof NoSuchAlgorithmException) 184 throw (NoSuchAlgorithmException) cause; 185 if (cause == null) 186 cause = x; 187 } 188 catch (ClassCastException x) 189 { 190 cause = x; 191 } 192 NoSuchAlgorithmException x = new NoSuchAlgorithmException(sb.toString()); 193 x.initCause(cause); 194 throw x; 195 } 196 197 /** 198 * Returns the default algorithm for trust manager factories. The value 199 * returned is either the value of the security property 200 * "ssl.TrustManagerFactory.algorithm" if it is set, or the value "JessieX509" 201 * if not. 202 * 203 * @return The default algorithm name. 204 * @see Security.getProperty(java.lang.String) 205 */ 206 public static final String getDefaultAlgorithm() 207 { 208 String alg = null; 209 try 210 { 211 alg = (String) AccessController.doPrivileged( 212 new PrivilegedAction() 213 { 214 public Object run() 215 { 216 return Security.getProperty("ssl.TrustManagerFactory.algorithm"); 217 } 218 } 219 ); 220 } 221 catch (SecurityException se) 222 { 223 } 224 if (alg == null) 225 alg = DEFAULT_ALGORITHM; 226 return alg; 227 } 228 229 // Instance methods. 230 // ------------------------------------------------------------------------- 231 232 /** 233 * Returns the name of this trust manager algorithm. 234 * 235 * @return The algorithm name. 236 */ 237 public final String getAlgorithm() 238 { 239 return algorithm; 240 } 241 242 /** 243 * Returns the provider of the underlying implementation. 244 * 245 * @return The provider. 246 */ 247 public final Provider getProvider() 248 { 249 return provider; 250 } 251 252 /** 253 * Returns the trust managers created by this factory. 254 * 255 * @return The trust managers. 256 */ 257 public final TrustManager[] getTrustManagers() 258 { 259 return tmfSpi.engineGetTrustManagers(); 260 } 261 262 /** 263 * Initialize this instance with some algorithm-specific parameters. 264 * 265 * @param params The parameters. 266 * @throws InvalidAlgorithmParameterException If the supplied parameters 267 * are inappropriate for this instance. 268 */ 269 public final void init(ManagerFactoryParameters params) 270 throws InvalidAlgorithmParameterException 271 { 272 tmfSpi.engineInit(params); 273 } 274 275 /** 276 * Initialize this instance with a key store. The key store may be null, 277 * in which case a default will be used. 278 * 279 * @param store The key store. 280 * @throws KeyStoreException If there is a problem reading from the 281 * key store. 282 */ 283 public final void init(KeyStore store) throws KeyStoreException 284 { 285 tmfSpi.engineInit(store); 286 } 287}