| /* |
| * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.security.smartcardio; |
| |
| import java.util.*; |
| import java.lang.ref.*; |
| |
| import javax.smartcardio.*; |
| import static javax.smartcardio.CardTerminals.State.*; |
| |
| import static sun.security.smartcardio.PCSC.*; |
| |
| /** |
| * TerminalFactorySpi implementation class. |
| * |
| * @since 1.6 |
| * @author Andreas Sterbenz |
| */ |
| final class PCSCTerminals extends CardTerminals { |
| |
| // SCARDCONTEXT, currently shared between all threads/terminals |
| private static long contextId; |
| |
| // terminal state used by waitForCard() |
| private Map<String,ReaderState> stateMap; |
| |
| PCSCTerminals() { |
| // empty |
| } |
| |
| static synchronized void initContext() throws PCSCException { |
| if (contextId == 0) { |
| contextId = SCardEstablishContext(SCARD_SCOPE_USER); |
| } |
| } |
| |
| private static final Map<String,Reference<TerminalImpl>> terminals |
| = new HashMap<String,Reference<TerminalImpl>>(); |
| |
| private static synchronized TerminalImpl implGetTerminal(String name) { |
| Reference<TerminalImpl> ref = terminals.get(name); |
| TerminalImpl terminal = (ref != null) ? ref.get() : null; |
| if (terminal != null) { |
| return terminal; |
| } |
| terminal = new TerminalImpl(contextId, name); |
| terminals.put(name, new WeakReference<TerminalImpl>(terminal)); |
| return terminal; |
| |
| } |
| |
| public synchronized List<CardTerminal> list(State state) throws CardException { |
| if (state == null) { |
| throw new NullPointerException(); |
| } |
| try { |
| String[] readerNames = SCardListReaders(contextId); |
| List<CardTerminal> list = new ArrayList<CardTerminal>(readerNames.length); |
| if (stateMap == null) { |
| // If waitForChange() has never been called, treat event |
| // queries as status queries. |
| if (state == CARD_INSERTION) { |
| state = CARD_PRESENT; |
| } else if (state == CARD_REMOVAL) { |
| state = CARD_ABSENT; |
| } |
| } |
| for (String readerName : readerNames) { |
| CardTerminal terminal = implGetTerminal(readerName); |
| ReaderState readerState; |
| switch (state) { |
| case ALL: |
| list.add(terminal); |
| break; |
| case CARD_PRESENT: |
| if (terminal.isCardPresent()) { |
| list.add(terminal); |
| } |
| break; |
| case CARD_ABSENT: |
| if (terminal.isCardPresent() == false) { |
| list.add(terminal); |
| } |
| break; |
| case CARD_INSERTION: |
| readerState = stateMap.get(readerName); |
| if ((readerState != null) && readerState.isInsertion()) { |
| list.add(terminal); |
| } |
| break; |
| case CARD_REMOVAL: |
| readerState = stateMap.get(readerName); |
| if ((readerState != null) && readerState.isRemoval()) { |
| list.add(terminal); |
| } |
| break; |
| default: |
| throw new CardException("Unknown state: " + state); |
| } |
| } |
| return Collections.unmodifiableList(list); |
| } catch (PCSCException e) { |
| throw new CardException("list() failed", e); |
| } |
| } |
| |
| private static class ReaderState { |
| private int current, previous; |
| ReaderState() { |
| current = SCARD_STATE_UNAWARE; |
| previous = SCARD_STATE_UNAWARE; |
| } |
| int get() { |
| return current; |
| } |
| void update(int newState) { |
| previous = current; |
| current = newState; |
| } |
| boolean isInsertion() { |
| return !present(previous) && present(current); |
| } |
| boolean isRemoval() { |
| return present(previous) && !present(current); |
| } |
| static boolean present(int state) { |
| return (state & SCARD_STATE_PRESENT) != 0; |
| } |
| } |
| |
| public synchronized boolean waitForChange(long timeout) throws CardException { |
| if (timeout < 0) { |
| throw new IllegalArgumentException |
| ("Timeout must not be negative: " + timeout); |
| } |
| if (stateMap == null) { |
| // We need to initialize the state database. |
| // Do that with a recursive call, which will return immediately |
| // because we pass SCARD_STATE_UNAWARE. |
| // After that, proceed with the real call. |
| stateMap = new HashMap<String,ReaderState>(); |
| waitForChange(0); |
| } |
| if (timeout == 0) { |
| timeout = TIMEOUT_INFINITE; |
| } |
| try { |
| String[] readerNames = SCardListReaders(contextId); |
| int n = readerNames.length; |
| if (n == 0) { |
| throw new IllegalStateException("No terminals available"); |
| } |
| int[] status = new int[n]; |
| ReaderState[] readerStates = new ReaderState[n]; |
| for (int i = 0; i < readerNames.length; i++) { |
| String name = readerNames[i]; |
| ReaderState state = stateMap.get(name); |
| if (state == null) { |
| state = new ReaderState(); |
| } |
| readerStates[i] = state; |
| status[i] = state.get(); |
| } |
| status = SCardGetStatusChange(contextId, timeout, status, readerNames); |
| stateMap.clear(); // remove any readers that are no longer available |
| for (int i = 0; i < n; i++) { |
| ReaderState state = readerStates[i]; |
| state.update(status[i]); |
| stateMap.put(readerNames[i], state); |
| } |
| return true; |
| } catch (PCSCException e) { |
| if (e.code == SCARD_E_TIMEOUT) { |
| return false; |
| } else { |
| throw new CardException("waitForChange() failed", e); |
| } |
| } |
| } |
| |
| static List<CardTerminal> waitForCards(List<? extends CardTerminal> terminals, |
| long timeout, boolean wantPresent) throws CardException { |
| // the argument sanity checks are performed in |
| // javax.smartcardio.TerminalFactory or TerminalImpl |
| |
| long thisTimeout; |
| if (timeout == 0) { |
| timeout = TIMEOUT_INFINITE; |
| thisTimeout = TIMEOUT_INFINITE; |
| } else { |
| // if timeout is not infinite, do the initial call that retrieves |
| // the status with a 0 timeout. Otherwise, we might get incorrect |
| // timeout exceptions (seen on Solaris with PC/SC shim) |
| thisTimeout = 0; |
| } |
| |
| String[] names = new String[terminals.size()]; |
| int i = 0; |
| for (CardTerminal terminal : terminals) { |
| if (terminal instanceof TerminalImpl == false) { |
| throw new IllegalArgumentException |
| ("Invalid terminal type: " + terminal.getClass().getName()); |
| } |
| TerminalImpl impl = (TerminalImpl)terminal; |
| names[i++] = impl.name; |
| } |
| |
| int[] status = new int[names.length]; |
| Arrays.fill(status, SCARD_STATE_UNAWARE); |
| |
| try { |
| while (true) { |
| // note that we pass "timeout" on each native PC/SC call |
| // that means that if we end up making multiple (more than 2) |
| // calls, we might wait too long. |
| // for now assume that is unlikely and not a problem. |
| status = SCardGetStatusChange(contextId, thisTimeout, status, names); |
| thisTimeout = timeout; |
| |
| List<CardTerminal> results = null; |
| for (i = 0; i < names.length; i++) { |
| boolean nowPresent = (status[i] & SCARD_STATE_PRESENT) != 0; |
| if (nowPresent == wantPresent) { |
| if (results == null) { |
| results = new ArrayList<CardTerminal>(); |
| } |
| results.add(implGetTerminal(names[i])); |
| } |
| } |
| |
| if (results != null) { |
| return Collections.unmodifiableList(results); |
| } |
| } |
| } catch (PCSCException e) { |
| if (e.code == SCARD_E_TIMEOUT) { |
| return Collections.emptyList(); |
| } else { |
| throw new CardException("waitForCard() failed", e); |
| } |
| } |
| } |
| |
| } |