J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001-2003 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 | package com.sun.jndi.ldap.sasl; |
| 27 | |
| 28 | import javax.security.sasl.Sasl; |
| 29 | import javax.security.sasl.SaslClient; |
| 30 | import javax.security.sasl.SaslException; |
| 31 | import java.io.IOException; |
| 32 | import java.io.FilterOutputStream; |
| 33 | import java.io.OutputStream; |
| 34 | |
| 35 | class SaslOutputStream extends FilterOutputStream { |
| 36 | private static final boolean debug = false; |
| 37 | |
| 38 | private byte[] lenBuf = new byte[4]; // buffer for storing length |
| 39 | private int rawSendSize = 65536; |
| 40 | private SaslClient sc; |
| 41 | |
| 42 | SaslOutputStream(SaslClient sc, OutputStream out) throws SaslException { |
| 43 | super(out); |
| 44 | this.sc = sc; |
| 45 | |
| 46 | if (debug) { |
| 47 | System.err.println("SaslOutputStream: " + out); |
| 48 | } |
| 49 | |
| 50 | String str = (String) sc.getNegotiatedProperty(Sasl.RAW_SEND_SIZE); |
| 51 | if (str != null) { |
| 52 | try { |
| 53 | rawSendSize = Integer.parseInt(str); |
| 54 | } catch (NumberFormatException e) { |
| 55 | throw new SaslException(Sasl.RAW_SEND_SIZE + |
| 56 | " property must be numeric string: " + str); |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | // Override this method to call write(byte[], int, int) counterpart |
| 62 | // super.write(int) simply calls out.write(int) |
| 63 | |
| 64 | public void write(int b) throws IOException { |
| 65 | byte[] buffer = new byte[1]; |
| 66 | buffer[0] = (byte)b; |
| 67 | write(buffer, 0, 1); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Override this method to "wrap" the outgoing buffer before |
| 72 | * writing it to the underlying output stream. |
| 73 | */ |
| 74 | public void write(byte[] buffer, int offset, int total) throws IOException { |
| 75 | int count; |
| 76 | byte[] wrappedToken, saslBuffer; |
| 77 | |
| 78 | // "Packetize" buffer to be within rawSendSize |
| 79 | if (debug) { |
| 80 | System.err.println("Total size: " + total); |
| 81 | } |
| 82 | |
| 83 | for (int i = 0; i < total; i += rawSendSize) { |
| 84 | |
| 85 | // Calculate length of current "packet" |
| 86 | count = (total - i) < rawSendSize ? (total - i) : rawSendSize; |
| 87 | |
| 88 | // Generate wrapped token |
| 89 | wrappedToken = sc.wrap(buffer, offset+i, count); |
| 90 | |
| 91 | // Write out length |
| 92 | intToNetworkByteOrder(wrappedToken.length, lenBuf, 0, 4); |
| 93 | |
| 94 | if (debug) { |
| 95 | System.err.println("sending size: " + wrappedToken.length); |
| 96 | } |
| 97 | out.write(lenBuf, 0, 4); |
| 98 | |
| 99 | // Write out wrapped token |
| 100 | out.write(wrappedToken, 0, wrappedToken.length); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | public void close() throws IOException { |
| 105 | SaslException save = null; |
| 106 | try { |
| 107 | sc.dispose(); // Dispose of SaslClient's state |
| 108 | } catch (SaslException e) { |
| 109 | // Save exception for throwing after closing 'in' |
| 110 | save = e; |
| 111 | } |
| 112 | super.close(); // Close underlying output stream |
| 113 | |
| 114 | if (save != null) { |
| 115 | throw save; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | // Copied from com.sun.security.sasl.util.SaslImpl |
| 120 | /** |
| 121 | * Encodes an integer into 4 bytes in network byte order in the buffer |
| 122 | * supplied. |
| 123 | */ |
| 124 | private static void intToNetworkByteOrder(int num, byte[] buf, int start, |
| 125 | int count) { |
| 126 | if (count > 4) { |
| 127 | throw new IllegalArgumentException("Cannot handle more than 4 bytes"); |
| 128 | } |
| 129 | |
| 130 | for (int i = count-1; i >= 0; i--) { |
| 131 | buf[start+i] = (byte)(num & 0xff); |
| 132 | num >>>= 8; |
| 133 | } |
| 134 | } |
| 135 | } |