J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2004 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | |
| 27 | package com.sun.security.sasl.gsskerb; |
| 28 | |
| 29 | import java.io.IOException; |
| 30 | import java.util.Map; |
| 31 | import java.util.logging.Logger; |
| 32 | import java.util.logging.Level; |
| 33 | import javax.security.sasl.*; |
| 34 | import com.sun.security.sasl.util.AbstractSaslImpl; |
| 35 | import org.ietf.jgss.*; |
| 36 | |
| 37 | abstract class GssKrb5Base extends AbstractSaslImpl { |
| 38 | |
| 39 | private static final String KRB5_OID_STR = "1.2.840.113554.1.2.2"; |
| 40 | protected static Oid KRB5_OID; |
| 41 | protected static final byte[] EMPTY = new byte[0]; |
| 42 | |
| 43 | static { |
| 44 | try { |
| 45 | KRB5_OID = new Oid(KRB5_OID_STR); |
| 46 | } catch (GSSException ignore) {} |
| 47 | } |
| 48 | |
| 49 | protected GSSContext secCtx = null; |
| 50 | protected MessageProp msgProp; // QOP and privacy for unwrap |
| 51 | protected static final int JGSS_QOP = 0; // unrelated to SASL QOP mask |
| 52 | |
| 53 | protected GssKrb5Base(Map props, String className) throws SaslException { |
| 54 | super(props, className); |
| 55 | } |
| 56 | |
| 57 | /** |
| 58 | * Retrieves this mechanism's name. |
| 59 | * |
| 60 | * @return The string "GSSAPI". |
| 61 | */ |
| 62 | public String getMechanismName() { |
| 63 | return "GSSAPI"; |
| 64 | } |
| 65 | |
| 66 | public byte[] unwrap(byte[] incoming, int start, int len) |
| 67 | throws SaslException { |
| 68 | if (!completed) { |
| 69 | throw new IllegalStateException("GSSAPI authentication not completed"); |
| 70 | } |
| 71 | |
| 72 | // integrity will be true if either privacy or integrity negotiated |
| 73 | if (!integrity) { |
| 74 | throw new IllegalStateException("No security layer negotiated"); |
| 75 | } |
| 76 | |
| 77 | try { |
| 78 | byte[] answer = secCtx.unwrap(incoming, start, len, msgProp); |
| 79 | if (logger.isLoggable(Level.FINEST)) { |
| 80 | traceOutput(myClassName, "KRB501:Unwrap", "incoming: ", |
| 81 | incoming, start, len); |
| 82 | traceOutput(myClassName, "KRB502:Unwrap", "unwrapped: ", |
| 83 | answer, 0, answer.length); |
| 84 | } |
| 85 | return answer; |
| 86 | } catch (GSSException e) { |
| 87 | throw new SaslException("Problems unwrapping SASL buffer", e); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | public byte[] wrap(byte[] outgoing, int start, int len) throws SaslException { |
| 92 | if (!completed) { |
| 93 | throw new IllegalStateException("GSSAPI authentication not completed"); |
| 94 | } |
| 95 | |
| 96 | // integrity will be true if either privacy or integrity negotiated |
| 97 | if (!integrity) { |
| 98 | throw new IllegalStateException("No security layer negotiated"); |
| 99 | } |
| 100 | |
| 101 | // Generate GSS token |
| 102 | try { |
| 103 | byte[] answer = secCtx.wrap(outgoing, start, len, msgProp); |
| 104 | if (logger.isLoggable(Level.FINEST)) { |
| 105 | traceOutput(myClassName, "KRB503:Wrap", "outgoing: ", |
| 106 | outgoing, start, len); |
| 107 | traceOutput(myClassName, "KRB504:Wrap", "wrapped: ", |
| 108 | answer, 0, answer.length); |
| 109 | } |
| 110 | return answer; |
| 111 | |
| 112 | } catch (GSSException e) { |
| 113 | throw new SaslException("Problem performing GSS wrap", e); |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | public void dispose() throws SaslException { |
| 118 | if (secCtx != null) { |
| 119 | try { |
| 120 | secCtx.dispose(); |
| 121 | } catch (GSSException e) { |
| 122 | throw new SaslException("Problem disposing GSS context", e); |
| 123 | } |
| 124 | secCtx = null; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | protected void finalize() throws Throwable { |
| 129 | dispose(); |
| 130 | } |
| 131 | } |