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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 | +} | |