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 | package javax.net.ssl; |
| 27 | |
| 28 | /** |
| 29 | * An encapsulation of the result state produced by |
| 30 | * <code>SSLEngine</code> I/O calls. |
| 31 | * |
| 32 | * <p> A <code>SSLEngine</code> provides a means for establishing |
| 33 | * secure communication sessions between two peers. <code>SSLEngine</code> |
| 34 | * operations typically consume bytes from an input buffer and produce |
| 35 | * bytes in an output buffer. This class provides operational result |
| 36 | * values describing the state of the <code>SSLEngine</code>, including |
| 37 | * indications of what operations are needed to finish an |
| 38 | * ongoing handshake. Lastly, it reports the number of bytes consumed |
| 39 | * and produced as a result of this operation. |
| 40 | * |
| 41 | * @see SSLEngine |
| 42 | * @see SSLEngine#wrap(ByteBuffer, ByteBuffer) |
| 43 | * @see SSLEngine#unwrap(ByteBuffer, ByteBuffer) |
| 44 | * |
| 45 | * @author Brad R. Wetmore |
| 46 | * @since 1.5 |
| 47 | */ |
| 48 | |
| 49 | public class SSLEngineResult { |
| 50 | |
| 51 | /** |
| 52 | * An <code>SSLEngineResult</code> enum describing the overall result |
| 53 | * of the <code>SSLEngine</code> operation. |
| 54 | * |
| 55 | * The <code>Status</code> value does not reflect the |
| 56 | * state of a <code>SSLEngine</code> handshake currently |
| 57 | * in progress. The <code>SSLEngineResult's HandshakeStatus</code> |
| 58 | * should be consulted for that information. |
| 59 | * |
| 60 | * @author Brad R. Wetmore |
| 61 | * @since 1.5 |
| 62 | */ |
| 63 | public static enum Status { |
| 64 | |
| 65 | /** |
| 66 | * The <code>SSLEngine</code> was not able to unwrap the |
| 67 | * incoming data because there were not enough source bytes |
| 68 | * available to make a complete packet. |
| 69 | * |
| 70 | * <P> |
| 71 | * Repeat the call once more bytes are available. |
| 72 | */ |
| 73 | BUFFER_UNDERFLOW, |
| 74 | |
| 75 | /** |
| 76 | * The <code>SSLEngine</code> was not able to process the |
| 77 | * operation because there are not enough bytes available in the |
| 78 | * destination buffer to hold the result. |
| 79 | * <P> |
| 80 | * Repeat the call once more bytes are available. |
| 81 | * |
| 82 | * @see SSLSession#getPacketBufferSize() |
| 83 | * @see SSLSession#getApplicationBufferSize() |
| 84 | */ |
| 85 | BUFFER_OVERFLOW, |
| 86 | |
| 87 | /** |
| 88 | * The <code>SSLEngine</code> completed the operation, and |
| 89 | * is available to process similar calls. |
| 90 | */ |
| 91 | OK, |
| 92 | |
| 93 | /** |
| 94 | * The operation just closed this side of the |
| 95 | * <code>SSLEngine</code>, or the operation |
| 96 | * could not be completed because it was already closed. |
| 97 | */ |
| 98 | CLOSED; |
| 99 | } |
| 100 | |
| 101 | /** |
| 102 | * An <code>SSLEngineResult</code> enum describing the current |
| 103 | * handshaking state of this <code>SSLEngine</code>. |
| 104 | * |
| 105 | * @author Brad R. Wetmore |
| 106 | * @since 1.5 |
| 107 | */ |
| 108 | public static enum HandshakeStatus { |
| 109 | |
| 110 | /** |
| 111 | * The <code>SSLEngine</code> is not currently handshaking. |
| 112 | */ |
| 113 | NOT_HANDSHAKING, |
| 114 | |
| 115 | /** |
| 116 | * The <code>SSLEngine</code> has just finished handshaking. |
| 117 | * <P> |
| 118 | * This value is only generated by a call to |
| 119 | * <code>SSLEngine.wrap()/unwrap()</code> when that call |
| 120 | * finishes a handshake. It is never generated by |
| 121 | * <code>SSLEngine.getHandshakeStatus()</code>. |
| 122 | * |
| 123 | * @see SSLEngine#wrap(ByteBuffer, ByteBuffer) |
| 124 | * @see SSLEngine#unwrap(ByteBuffer, ByteBuffer) |
| 125 | * @see SSLEngine#getHandshakeStatus() |
| 126 | */ |
| 127 | FINISHED, |
| 128 | |
| 129 | /** |
| 130 | * The <code>SSLEngine</code> needs the results of one (or more) |
| 131 | * delegated tasks before handshaking can continue. |
| 132 | * |
| 133 | * @see SSLEngine#getDelegatedTask() |
| 134 | */ |
| 135 | NEED_TASK, |
| 136 | |
| 137 | /** |
| 138 | * The <code>SSLEngine</code> must send data to the remote side |
| 139 | * before handshaking can continue, so <code>SSLEngine.wrap()</code> |
| 140 | * should be called. |
| 141 | * |
| 142 | * @see SSLEngine#wrap(ByteBuffer, ByteBuffer) |
| 143 | */ |
| 144 | NEED_WRAP, |
| 145 | |
| 146 | /** |
| 147 | * The <code>SSLEngine</code> needs to receive data from the |
| 148 | * remote side before handshaking can continue. |
| 149 | */ |
| 150 | NEED_UNWRAP; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | private final Status status; |
| 155 | private final HandshakeStatus handshakeStatus; |
| 156 | private final int bytesConsumed; |
| 157 | private final int bytesProduced; |
| 158 | |
| 159 | /** |
| 160 | * Initializes a new instance of this class. |
| 161 | * |
| 162 | * @param status |
| 163 | * the return value of the operation. |
| 164 | * |
| 165 | * @param handshakeStatus |
| 166 | * the current handshaking status. |
| 167 | * |
| 168 | * @param bytesConsumed |
| 169 | * the number of bytes consumed from the source ByteBuffer |
| 170 | * |
| 171 | * @param bytesProduced |
| 172 | * the number of bytes placed into the destination ByteBuffer |
| 173 | * |
| 174 | * @throws IllegalArgumentException |
| 175 | * if the <code>status</code> or <code>handshakeStatus</code> |
| 176 | * arguments are null, or if <<code>bytesConsumed</code> or |
| 177 | * <code>bytesProduced</code> is negative. |
| 178 | */ |
| 179 | public SSLEngineResult(Status status, HandshakeStatus handshakeStatus, |
| 180 | int bytesConsumed, int bytesProduced) { |
| 181 | |
| 182 | if ((status == null) || (handshakeStatus == null) || |
| 183 | (bytesConsumed < 0) || (bytesProduced < 0)) { |
| 184 | throw new IllegalArgumentException("Invalid Parameter(s)"); |
| 185 | } |
| 186 | |
| 187 | this.status = status; |
| 188 | this.handshakeStatus = handshakeStatus; |
| 189 | this.bytesConsumed = bytesConsumed; |
| 190 | this.bytesProduced = bytesProduced; |
| 191 | } |
| 192 | |
| 193 | /** |
| 194 | * Gets the return value of this <code>SSLEngine</code> operation. |
| 195 | * |
| 196 | * @return the return value |
| 197 | */ |
| 198 | final public Status getStatus() { |
| 199 | return status; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * Gets the handshake status of this <code>SSLEngine</code> |
| 204 | * operation. |
| 205 | * |
| 206 | * @return the handshake status |
| 207 | */ |
| 208 | final public HandshakeStatus getHandshakeStatus() { |
| 209 | return handshakeStatus; |
| 210 | } |
| 211 | |
| 212 | /** |
| 213 | * Returns the number of bytes consumed from the input buffer. |
| 214 | * |
| 215 | * @return the number of bytes consumed. |
| 216 | */ |
| 217 | final public int bytesConsumed() { |
| 218 | return bytesConsumed; |
| 219 | } |
| 220 | |
| 221 | /** |
| 222 | * Returns the number of bytes written to the output buffer. |
| 223 | * |
| 224 | * @return the number of bytes produced |
| 225 | */ |
| 226 | final public int bytesProduced() { |
| 227 | return bytesProduced; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * Returns a String representation of this object. |
| 232 | */ |
| 233 | public String toString() { |
| 234 | return ("Status = " + status + |
| 235 | " HandshakeStatus = " + handshakeStatus + |
| 236 | "\nbytesConsumed = " + bytesConsumed + |
| 237 | " bytesProduced = " + bytesProduced); |
| 238 | } |
| 239 | } |