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| 1 | +/* | |
| 2 | + * Copyright (c) 1999, 2006, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package com.sun.security.sasl; | |
| 27 | + | |
| 28 | +import javax.security.sasl.*; | |
| 29 | +import com.sun.security.sasl.util.PolicyUtils; | |
| 30 | + | |
| 31 | +import java.util.Map; | |
| 32 | +import java.io.IOException; | |
| 33 | +import javax.security.auth.callback.Callback; | |
| 34 | +import javax.security.auth.callback.CallbackHandler; | |
| 35 | +import javax.security.auth.callback.NameCallback; | |
| 36 | +import javax.security.auth.callback.PasswordCallback; | |
| 37 | +import javax.security.auth.callback.UnsupportedCallbackException; | |
| 38 | + | |
| 39 | +/** | |
| 40 | + * Client factory for EXTERNAL, CRAM-MD5, PLAIN. | |
| 41 | + * | |
| 42 | + * Requires the following callbacks to be satisfied by callback handler | |
| 43 | + * when using CRAM-MD5 or PLAIN. | |
| 44 | + * - NameCallback (to get username) | |
| 45 | + * - PasswordCallback (to get password) | |
| 46 | + * | |
| 47 | + * @author Rosanna Lee | |
| 48 | + */ | |
| 49 | +final public class ClientFactoryImpl implements SaslClientFactory { | |
| 50 | + private static final String myMechs[] = { | |
| 51 | + "EXTERNAL", | |
| 52 | + "CRAM-MD5", | |
| 53 | + "PLAIN", | |
| 54 | + }; | |
| 55 | + | |
| 56 | + private static final int mechPolicies[] = { | |
| 57 | + // %%% RL: Policies should actually depend on the external channel | |
| 58 | + PolicyUtils.NOPLAINTEXT|PolicyUtils.NOACTIVE|PolicyUtils.NODICTIONARY, | |
| 59 | + PolicyUtils.NOPLAINTEXT|PolicyUtils.NOANONYMOUS, // CRAM-MD5 | |
| 60 | + PolicyUtils.NOANONYMOUS, // PLAIN | |
| 61 | + }; | |
| 62 | + | |
| 63 | + private static final int EXTERNAL = 0; | |
| 64 | + private static final int CRAMMD5 = 1; | |
| 65 | + private static final int PLAIN = 2; | |
| 66 | + | |
| 67 | + public ClientFactoryImpl() { | |
| 68 | + } | |
| 69 | + | |
| 70 | + public SaslClient createSaslClient(String[] mechs, | |
| 71 | + String authorizationId, | |
| 72 | + String protocol, | |
| 73 | + String serverName, | |
| 74 | + Map<String,?> props, | |
| 75 | + CallbackHandler cbh) throws SaslException { | |
| 76 | + | |
| 77 | + for (int i = 0; i < mechs.length; i++) { | |
| 78 | + if (mechs[i].equals(myMechs[EXTERNAL]) | |
| 79 | + && PolicyUtils.checkPolicy(mechPolicies[EXTERNAL], props)) { | |
| 80 | + return new ExternalClient(authorizationId); | |
| 81 | + | |
| 82 | + } else if (mechs[i].equals(myMechs[CRAMMD5]) | |
| 83 | + && PolicyUtils.checkPolicy(mechPolicies[CRAMMD5], props)) { | |
| 84 | + | |
| 85 | + Object[] uinfo = getUserInfo("CRAM-MD5", authorizationId, cbh); | |
| 86 | + | |
| 87 | + // Callee responsible for clearing bytepw | |
| 88 | + return new CramMD5Client((String) uinfo[0], | |
| 89 | + (byte []) uinfo[1]); | |
| 90 | + | |
| 91 | + } else if (mechs[i].equals(myMechs[PLAIN]) | |
| 92 | + && PolicyUtils.checkPolicy(mechPolicies[PLAIN], props)) { | |
| 93 | + | |
| 94 | + Object[] uinfo = getUserInfo("PLAIN", authorizationId, cbh); | |
| 95 | + | |
| 96 | + // Callee responsible for clearing bytepw | |
| 97 | + return new PlainClient(authorizationId, | |
| 98 | + (String) uinfo[0], (byte []) uinfo[1]); | |
| 99 | + } | |
| 100 | + } | |
| 101 | + return null; | |
| 102 | + }; | |
| 103 | + | |
| 104 | + public String[] getMechanismNames(Map<String,?> props) { | |
| 105 | + return PolicyUtils.filterMechs(myMechs, mechPolicies, props); | |
| 106 | + } | |
| 107 | + | |
| 108 | + /** | |
| 109 | + * Gets the authentication id and password. The | |
| 110 | + * password is converted to bytes using UTF-8 and stored in bytepw. | |
| 111 | + * The authentication id is stored in authId. | |
| 112 | + * | |
| 113 | + * @param prefix The non-null prefix to use for the prompt (e.g., mechanism | |
| 114 | + * name) | |
| 115 | + * @param authorizationId The possibly null authorization id. This is used | |
| 116 | + * as a default for the NameCallback. If null, it is not used in prompt. | |
| 117 | + * @param cbh The non-null callback handler to use. | |
| 118 | + * @return an {authid, passwd} pair | |
| 119 | + */ | |
| 120 | + private Object[] getUserInfo(String prefix, String authorizationId, | |
| 121 | + CallbackHandler cbh) throws SaslException { | |
| 122 | + if (cbh == null) { | |
| 123 | + throw new SaslException( | |
| 124 | + "Callback handler to get username/password required"); | |
| 125 | + } | |
| 126 | + try { | |
| 127 | + String userPrompt = prefix + " authentication id: "; | |
| 128 | + String passwdPrompt = prefix + " password: "; | |
| 129 | + | |
| 130 | + NameCallback ncb = authorizationId == null? | |
| 131 | + new NameCallback(userPrompt) : | |
| 132 | + new NameCallback(userPrompt, authorizationId); | |
| 133 | + | |
| 134 | + PasswordCallback pcb = new PasswordCallback(passwdPrompt, false); | |
| 135 | + | |
| 136 | + cbh.handle(new Callback[]{ncb,pcb}); | |
| 137 | + | |
| 138 | + char[] pw = pcb.getPassword(); | |
| 139 | + | |
| 140 | + byte[] bytepw; | |
| 141 | + String authId; | |
| 142 | + | |
| 143 | + if (pw != null) { | |
| 144 | + bytepw = new String(pw).getBytes("UTF8"); | |
| 145 | + pcb.clearPassword(); | |
| 146 | + } else { | |
| 147 | + bytepw = null; | |
| 148 | + } | |
| 149 | + | |
| 150 | + authId = ncb.getName(); | |
| 151 | + | |
| 152 | + return new Object[]{authId, bytepw}; | |
| 153 | + | |
| 154 | + } catch (IOException e) { | |
| 155 | + throw new SaslException("Cannot get password", e); | |
| 156 | + } catch (UnsupportedCallbackException e) { | |
| 157 | + throw new SaslException("Cannot get userid/password", e); | |
| 158 | + } | |
| 159 | + } | |
| 160 | +} | |