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| 1 | /* | ||
| 2 | * Copyright (c) 2005, 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 sun.security.smartcardio; | ||
| 27 | |||
| 28 | import java.nio.*; | ||
| 29 | import java.security.AccessController; | ||
| 30 | |||
| 31 | import javax.smartcardio.*; | ||
| 32 | |||
| 33 | import static sun.security.smartcardio.PCSC.*; | ||
| 34 | |||
| 35 | import sun.security.action.GetPropertyAction; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * CardChannel implementation. | ||
| 39 | * | ||
| 40 | * @since 1.6 | ||
| 41 | * @author Andreas Sterbenz | ||
| 42 | */ | ||
| 43 | final class ChannelImpl extends CardChannel { | ||
| 44 | |||
| 45 | // the card this channel is associated with | ||
| 46 | private final CardImpl card; | ||
| 47 | |||
| 48 | // the channel number, 0 for the basic logical channel | ||
| 49 | private final int channel; | ||
| 50 | |||
| 51 | // whether this channel has been closed. only logical channels can be closed | ||
| 52 | private volatile boolean isClosed; | ||
| 53 | |||
| 54 | ChannelImpl(CardImpl card, int channel) { | ||
| 55 | this.card = card; | ||
| 56 | this.channel = channel; | ||
| 57 | } | ||
| 58 | |||
| 59 | void checkClosed() { | ||
| 60 | card.checkState(); | ||
| 61 | if (isClosed) { | ||
| 62 | throw new IllegalStateException("Logical channel has been closed"); | ||
| 63 | } | ||
| 64 | } | ||
| 65 | |||
| 66 | public Card getCard() { | ||
| 67 | return card; | ||
| 68 | } | ||
| 69 | |||
| 70 | public int getChannelNumber() { | ||
| 71 | checkClosed(); | ||
| 72 | return channel; | ||
| 73 | } | ||
| 74 | |||
| 75 | private static void checkManageChannel(byte[] b) { | ||
| 76 | if (b.length < 4) { | ||
| 77 | throw new IllegalArgumentException | ||
| 78 | ("Command APDU must be at least 4 bytes long"); | ||
| 79 | } | ||
| 80 | if ((b[0] >= 0) && (b[1] == 0x70)) { | ||
| 81 | throw new IllegalArgumentException | ||
| 82 | ("Manage channel command not allowed, use openLogicalChannel()"); | ||
| 83 | } | ||
| 84 | } | ||
| 85 | |||
| 86 | public ResponseAPDU transmit(CommandAPDU command) throws CardException { | ||
| 87 | checkClosed(); | ||
| 88 | card.checkExclusive(); | ||
| 89 | byte[] commandBytes = command.getBytes(); | ||
| 90 | byte[] responseBytes = doTransmit(commandBytes); | ||
| 91 | return new ResponseAPDU(responseBytes); | ||
| 92 | } | ||
| 93 | |||
| 94 | public int transmit(ByteBuffer command, ByteBuffer response) throws CardException { | ||
| 95 | checkClosed(); | ||
| 96 | card.checkExclusive(); | ||
| 97 | if ((command == null) || (response == null)) { | ||
| 98 | throw new NullPointerException(); | ||
| 99 | } | ||
| 100 | if (response.isReadOnly()) { | ||
| 101 | throw new ReadOnlyBufferException(); | ||
| 102 | } | ||
| 103 | if (command == response) { | ||
| 104 | throw new IllegalArgumentException | ||
| 105 | ("command and response must not be the same object"); | ||
| 106 | } | ||
| 107 | if (response.remaining() < 258) { | ||
| 108 | throw new IllegalArgumentException | ||
| 109 | ("Insufficient space in response buffer"); | ||
| 110 | } | ||
| 111 | byte[] commandBytes = new byte[command.remaining()]; | ||
| 112 | command.get(commandBytes); | ||
| 113 | byte[] responseBytes = doTransmit(commandBytes); | ||
| 114 | response.put(responseBytes); | ||
| 115 | return responseBytes.length; | ||
| 116 | } | ||
| 117 | |||
| 118 | private final static boolean t0GetResponse = | ||
| 119 | getBooleanProperty("sun.security.smartcardio.t0GetResponse", true); | ||
| 120 | |||
| 121 | private final static boolean t1GetResponse = | ||
| 122 | getBooleanProperty("sun.security.smartcardio.t1GetResponse", true); | ||
| 123 | |||
| 124 | private final static boolean t1StripLe = | ||
| 125 | getBooleanProperty("sun.security.smartcardio.t1StripLe", false); | ||
| 126 | |||
| 127 | private static boolean getBooleanProperty(String name, boolean def) { | ||
| 128 | String val = AccessController.doPrivileged(new GetPropertyAction(name)); | ||
| 129 | if (val == null) { | ||
| 130 | return def; | ||
| 131 | } | ||
| 132 | if (val.equalsIgnoreCase("true")) { | ||
| 133 | return true; | ||
| 134 | } else if (val.equalsIgnoreCase("false")) { | ||
| 135 | return false; | ||
| 136 | } else { | ||
| 137 | throw new IllegalArgumentException | ||
| 138 | (name + " must be either 'true' or 'false'"); | ||
| 139 | } | ||
| 140 | } | ||
| 141 | |||
| 142 | private byte[] concat(byte[] b1, byte[] b2, int n2) { | ||
| 143 | int n1 = b1.length; | ||
| 144 | if ((n1 == 0) && (n2 == b2.length)) { | ||
| 145 | return b2; | ||
| 146 | } | ||
| 147 | byte[] res = new byte[n1 + n2]; | ||
| 148 | System.arraycopy(b1, 0, res, 0, n1); | ||
| 149 | System.arraycopy(b2, 0, res, n1, n2); | ||
| 150 | return res; | ||
| 151 | } | ||
| 152 | |||
| 153 | private final static byte[] B0 = new byte[0]; | ||
| 154 | |||
| 155 | private byte[] doTransmit(byte[] command) throws CardException { | ||
| 156 | // note that we modify the 'command' array in some cases, so it must | ||
| 157 | // be a copy of the application provided data. | ||
| 158 | try { | ||
| 159 | checkManageChannel(command); | ||
| 160 | setChannel(command); | ||
| 161 | int n = command.length; | ||
| 162 | boolean t0 = card.protocol == SCARD_PROTOCOL_T0; | ||
| 163 | boolean t1 = card.protocol == SCARD_PROTOCOL_T1; | ||
| 164 | if (t0 && (n >= 7) && (command[4] == 0)) { | ||
| 165 | throw new CardException | ||
| 166 | ("Extended length forms not supported for T=0"); | ||
| 167 | } | ||
| 168 | if ((t0 || (t1 && t1StripLe)) && (n >= 7)) { | ||
| 169 | int lc = command[4] & 0xff; | ||
| 170 | if (lc != 0) { | ||
| 171 | if (n == lc + 6) { | ||
| 172 | n--; | ||
| 173 | } | ||
| 174 | } else { | ||
| 175 | lc = ((command[5] & 0xff) << 8) | (command[6] & 0xff); | ||
| 176 | if (n == lc + 9) { | ||
| 177 | n -= 2; | ||
| 178 | } | ||
| 179 | } | ||
| 180 | } | ||
| 181 | boolean getresponse = (t0 && t0GetResponse) || (t1 && t1GetResponse); | ||
| 182 | int k = 0; | ||
| 183 | byte[] result = B0; | ||
| 184 | while (true) { | ||
| 185 | if (++k >= 32) { | ||
| 186 | throw new CardException("Could not obtain response"); | ||
| 187 | } | ||
| 188 | byte[] response = SCardTransmit | ||
| 189 | (card.cardId, card.protocol, command, 0, n); | ||
| 190 | int rn = response.length; | ||
| 191 | if (getresponse && (rn >= 2)) { | ||
| 192 | // see ISO 7816/2005, 5.1.3 | ||
| 193 | if ((rn == 2) && (response[0] == 0x6c)) { | ||
| 194 | // Resend command using SW2 as short Le field | ||
| 195 | command[n - 1] = response[1]; | ||
| 196 | continue; | ||
| 197 | } | ||
| 198 | if (response[rn - 2] == 0x61) { | ||
| 199 | // Issue a GET RESPONSE command with the same CLA | ||
| 200 | // using SW2 as short Le field | ||
| 201 | if (rn > 2) { | ||
| 202 | result = concat(result, response, rn - 2); | ||
| 203 | } | ||
| 204 | command[1] = (byte)0xC0; | ||
| 205 | command[2] = 0; | ||
| 206 | command[3] = 0; | ||
| 207 | command[4] = response[rn - 1]; | ||
| 208 | n = 5; | ||
| 209 | continue; | ||
| 210 | } | ||
| 211 | |||
| 212 | } | ||
| 213 | result = concat(result, response, rn); | ||
| 214 | break; | ||
| 215 | } | ||
| 216 | return result; | ||
| 217 | } catch (PCSCException e) { | ||
| 218 | card.handleError(e); | ||
| 219 | throw new CardException(e); | ||
| 220 | } | ||
| 221 | } | ||
| 222 | |||
| 223 | private static int getSW(byte[] res) throws CardException { | ||
| 224 | if (res.length < 2) { | ||
| 225 | throw new CardException("Invalid response length: " + res.length); | ||
| 226 | } | ||
| 227 | int sw1 = res[res.length - 2] & 0xff; | ||
| 228 | int sw2 = res[res.length - 1] & 0xff; | ||
| 229 | return (sw1 << 8) | sw2; | ||
| 230 | } | ||
| 231 | |||
| 232 | private static boolean isOK(byte[] res) throws CardException { | ||
| 233 | return (res.length == 2) && (getSW(res) == 0x9000); | ||
| 234 | } | ||
| 235 | |||
| 236 | private void setChannel(byte[] com) { | ||
| 237 | int cla = com[0]; | ||
| 238 | if (cla < 0) { | ||
| 239 | // proprietary class format, cannot set or check logical channel | ||
| 240 | // for now, just return | ||
| 241 | return; | ||
| 242 | } | ||
| 243 | // classes 001x xxxx is reserved for future use in ISO, ignore | ||
| 244 | if ((cla & 0xe0) == 0x20) { | ||
| 245 | return; | ||
| 246 | } | ||
| 247 | // see ISO 7816/2005, table 2 and 3 | ||
| 248 | if (channel <= 3) { | ||
| 249 | // mask of bits 7, 1, 0 (channel number) | ||
| 250 | // 0xbc == 1011 1100 | ||
| 251 | com[0] &= 0xbc; | ||
| 252 | com[0] |= channel; | ||
| 253 | } else if (channel <= 19) { | ||
| 254 | // mask of bits 7, 3, 2, 1, 0 (channel number) | ||
| 255 | // 0xbc == 1011 0000 | ||
| 256 | com[0] &= 0xb0; | ||
| 257 | com[0] |= 0x40; | ||
| 258 | com[0] |= (channel - 4); | ||
| 259 | } else { | ||
| 260 | throw new RuntimeException("Unsupported channel number: " + channel); | ||
| 261 | } | ||
| 262 | } | ||
| 263 | |||
| 264 | public void close() throws CardException { | ||
| 265 | if (getChannelNumber() == 0) { | ||
| 266 | throw new IllegalStateException("Cannot close basic logical channel"); | ||
| 267 | } | ||
| 268 | if (isClosed) { | ||
| 269 | return; | ||
| 270 | } | ||
| 271 | card.checkExclusive(); | ||
| 272 | try { | ||
| 273 | byte[] com = new byte[] {0x00, 0x70, (byte)0x80, 0}; | ||
| 274 | com[3] = (byte)getChannelNumber(); | ||
| 275 | setChannel(com); | ||
| 276 | byte[] res = SCardTransmit(card.cardId, card.protocol, com, 0, com.length); | ||
| 277 | if (isOK(res) == false) { | ||
| 278 | throw new CardException("close() failed: " + PCSC.toString(res)); | ||
| 279 | } | ||
| 280 | } catch (PCSCException e) { | ||
| 281 | card.handleError(e); | ||
| 282 | throw new CardException("Could not close channel", e); | ||
| 283 | } finally { | ||
| 284 | isClosed = true; | ||
| 285 | } | ||
| 286 | } | ||
| 287 | |||
| 288 | public String toString() { | ||
| 289 | return "PC/SC channel " + channel; | ||
| 290 | } | ||
| 291 | |||
| 292 | } | ||