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| 1 | /* | ||
| 2 | * Copyright (c) 2010, 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.ntlm; | ||
| 27 | |||
| 28 | import java.util.Arrays; | ||
| 29 | import java.util.Locale; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * The NTLM server, not multi-thread enabled.<p> | ||
| 33 | * Example: | ||
| 34 | * <pre> | ||
| 35 | * Server server = new Server(null, "REALM") { | ||
| 36 | * public char[] getPassword(String ntdomain, String username) { | ||
| 37 | * switch (username) { | ||
| 38 | * case "dummy": return "t0pSeCr3t".toCharArray(); | ||
| 39 | * case "guest": return "".toCharArray(); | ||
| 40 | * default: return null; | ||
| 41 | * } | ||
| 42 | * } | ||
| 43 | * }; | ||
| 44 | * // Receive client request as type1 | ||
| 45 | * byte[] type2 = server.type2(type1, nonce); | ||
| 46 | * // Send type2 to client and receive type3 | ||
| 47 | * verify(type3, nonce); | ||
| 48 | * </pre> | ||
| 49 | */ | ||
| 50 | public abstract class Server extends NTLM { | ||
| 51 | final private String domain; | ||
| 52 | final private boolean allVersion; | ||
| 53 | /** | ||
| 54 | * Creates a Server instance. | ||
| 55 | * @param version the NTLM version to use, which can be: | ||
| 56 | * <ul> | ||
| 57 | * <li>NTLM: Original NTLM v1 | ||
| 58 | * <li>NTLM2: NTLM v1 with Client Challenge | ||
| 59 | * <li>NTLMv2: NTLM v2 | ||
| 60 | * </ul> | ||
| 61 | * If null, all versions will be supported. Please note that unless NTLM2 | ||
| 62 | * is selected, authentication succeeds if one of LM (or LMv2) or | ||
| 63 | * NTLM (or NTLMv2) is verified. | ||
| 64 | * @param domain the domain, must not be null | ||
| 65 | * @throws NullPointerException if {@code domain} is null. | ||
| 66 | */ | ||
| 67 | public Server(String version, String domain) throws NTLMException { | ||
| 68 | super(version); | ||
| 69 | if (domain == null) { | ||
| 70 | throw new NullPointerException("domain cannot be null"); | ||
| 71 | } | ||
| 72 | this.allVersion = (version == null); | ||
| 73 | this.domain = domain; | ||
| 74 | debug("NTLM Server: (t,version) = (%s,%s)\n", domain, version); | ||
| 75 | } | ||
| 76 | |||
| 77 | /** | ||
| 78 | * Generates the Type 2 message | ||
| 79 | * @param type1 the Type1 message received, must not be null | ||
| 80 | * @param nonce the random 8-byte array to be used in message generation, | ||
| 81 | * must not be null | ||
| 82 | * @return the message generated | ||
| 83 | * @throws NullPointerException if type1 or nonce is null | ||
| 84 | * @throws NTLMException if the incoming message is invalid | ||
| 85 | */ | ||
| 86 | public byte[] type2(byte[] type1, byte[] nonce) { | ||
| 87 | if (nonce == null) { | ||
| 88 | throw new NullPointerException("nonce cannot be null"); | ||
| 89 | } | ||
| 90 | debug("NTLM Server: Type 1 received\n"); | ||
| 91 | if (type1 != null) debug(type1); | ||
| 92 | Writer p = new Writer(2, 32); | ||
| 93 | int flags = 0x80205; | ||
| 94 | p.writeSecurityBuffer(12, domain, true); | ||
| 95 | p.writeInt(20, flags); | ||
| 96 | p.writeBytes(24, nonce); | ||
| 97 | debug("NTLM Server: Type 2 created\n"); | ||
| 98 | debug(p.getBytes()); | ||
| 99 | return p.getBytes(); | ||
| 100 | } | ||
| 101 | |||
| 102 | /** | ||
| 103 | * Verifies the Type3 message received from client and returns | ||
| 104 | * various negotiated information. | ||
| 105 | * @param type3 the incoming Type3 message from client, must not be null | ||
| 106 | * @param nonce the same nonce provided in {@link #type2}, must not be null | ||
| 107 | * @return username and hostname of the client in a byte array | ||
| 108 | * @throws NullPointerException if {@code type3} or {@code nonce} is null | ||
| 109 | * @throws NTLMException if the incoming message is invalid | ||
| 110 | */ | ||
| 111 | public String[] verify(byte[] type3, byte[] nonce) | ||
| 112 | throws NTLMException { | ||
| 113 | if (type3 == null || nonce == null) { | ||
| 114 | throw new NullPointerException("type1 or nonce cannot be null"); | ||
| 115 | } | ||
| 116 | debug("NTLM Server: Type 3 received\n"); | ||
| 117 | if (type3 != null) debug(type3); | ||
| 118 | Reader r = new Reader(type3); | ||
| 119 | String username = r.readSecurityBuffer(36, true); | ||
| 120 | String hostname = r.readSecurityBuffer(44, true); | ||
| 121 | String incomingDomain = r.readSecurityBuffer(28, true); | ||
| 122 | /*if (incomingDomain != null && !incomingDomain.equals(domain)) { | ||
| 123 | throw new NTLMException(NTLMException.DOMAIN_UNMATCH, | ||
| 124 | "Wrong domain: " + incomingDomain + | ||
| 125 | " vs " + domain); // Needed? | ||
| 126 | }*/ | ||
| 127 | boolean verified = false; | ||
| 128 | char[] password = getPassword(domain, username); | ||
| 129 | if (password == null) { | ||
| 130 | throw new NTLMException(NTLMException.USER_UNKNOWN, | ||
| 131 | "Unknown user"); | ||
| 132 | } | ||
| 133 | byte[] incomingLM = r.readSecurityBuffer(12); | ||
| 134 | byte[] incomingNTLM = r.readSecurityBuffer(20); | ||
| 135 | |||
| 136 | if (!verified && (allVersion || v == Version.NTLM)) { | ||
| 137 | if (incomingLM.length > 0) { | ||
| 138 | byte[] pw1 = getP1(password); | ||
| 139 | byte[] lmhash = calcLMHash(pw1); | ||
| 140 | byte[] lmresponse = calcResponse (lmhash, nonce); | ||
| 141 | if (Arrays.equals(lmresponse, incomingLM)) { | ||
| 142 | verified = true; | ||
| 143 | } | ||
| 144 | } | ||
| 145 | if (incomingNTLM.length > 0) { | ||
| 146 | byte[] pw2 = getP2(password); | ||
| 147 | byte[] nthash = calcNTHash(pw2); | ||
| 148 | byte[] ntresponse = calcResponse (nthash, nonce); | ||
| 149 | if (Arrays.equals(ntresponse, incomingNTLM)) { | ||
| 150 | verified = true; | ||
| 151 | } | ||
| 152 | } | ||
| 153 | debug("NTLM Server: verify using NTLM: " + verified + "\n"); | ||
| 154 | } | ||
| 155 | if (!verified && (allVersion || v == Version.NTLM2)) { | ||
| 156 | byte[] pw2 = getP2(password); | ||
| 157 | byte[] nthash = calcNTHash(pw2); | ||
| 158 | byte[] clientNonce = Arrays.copyOf(incomingLM, 8); | ||
| 159 | byte[] ntlmresponse = ntlm2NTLM(nthash, clientNonce, nonce); | ||
| 160 | if (Arrays.equals(incomingNTLM, ntlmresponse)) { | ||
| 161 | verified = true; | ||
| 162 | } | ||
| 163 | debug("NTLM Server: verify using NTLM2: " + verified + "\n"); | ||
| 164 | } | ||
| 165 | if (!verified && (allVersion || v == Version.NTLMv2)) { | ||
| 166 | byte[] pw2 = getP2(password); | ||
| 167 | byte[] nthash = calcNTHash(pw2); | ||
| 168 | if (incomingLM.length > 0) { | ||
| 169 | byte[] clientNonce = Arrays.copyOfRange( | ||
| 170 | incomingLM, 16, incomingLM.length); | ||
| 171 | byte[] lmresponse = calcV2(nthash, | ||
| 172 | username.toUpperCase(Locale.US)+incomingDomain, | ||
| 173 | clientNonce, nonce); | ||
| 174 | if (Arrays.equals(lmresponse, incomingLM)) { | ||
| 175 | verified = true; | ||
| 176 | } | ||
| 177 | } | ||
| 178 | if (incomingNTLM.length > 0) { | ||
| 179 | byte[] clientBlob = Arrays.copyOfRange( | ||
| 180 | incomingNTLM, 16, incomingNTLM.length); | ||
| 181 | byte[] ntlmresponse = calcV2(nthash, | ||
| 182 | username.toUpperCase(Locale.US)+incomingDomain, | ||
| 183 | clientBlob, nonce); | ||
| 184 | if (Arrays.equals(ntlmresponse, incomingNTLM)) { | ||
| 185 | verified = true; | ||
| 186 | } | ||
| 187 | } | ||
| 188 | debug("NTLM Server: verify using NTLMv2: " + verified + "\n"); | ||
| 189 | } | ||
| 190 | if (!verified) { | ||
| 191 | throw new NTLMException(NTLMException.AUTH_FAILED, | ||
| 192 | "None of LM and NTLM verified"); | ||
| 193 | } | ||
| 194 | return new String[] {username, hostname}; | ||
| 195 | } | ||
| 196 | |||
| 197 | /** | ||
| 198 | * Retrieves the password for a given user. This method should be | ||
| 199 | * overridden in a concrete class. | ||
| 200 | * @param domain can be null | ||
| 201 | * @param username must not be null | ||
| 202 | * @return the password for the user, or null if unknown | ||
| 203 | */ | ||
| 204 | public abstract char[] getPassword(String domain, String username); | ||
| 205 | } | ||