Do not use transactions on Windows, if exclusive mode has been specif…

…ied.

https://msdn.microsoft.com/en-us/library/windows/desktop/aa379469%28v=vs.85%29.aspx

src/apdu4j/SCTool.java

@@ -429,8 +429,17 @@ private static void work(CardTerminal reader, OptionSet args) throws CardExcepti
 					transport = SocketTransport.connect(string2socket(remote), null);
 				}
 
+				// Windows 8+ have the "5 seconds of transaction" limit. Because we want reliability
+				// and don't have access to arbitrary SCard* calls via javax.smartcardio, we rely on
+				// JNA interface and its EXCLUSIVE access instead and do NOT use the SCardBeginTransaction
+				// capability of the JNA interface.
+				// https://msdn.microsoft.com/en-us/library/windows/desktop/aa379469%28v=vs.85%29.aspx
+				boolean transact = true;
+				if (System.getProperty("os.name").toLowerCase().contains("windows") && args.has(OPT_EXCLUSIVE)) {
+					transact = false;
+				}
 				// Connect the transport and the terminal
-				CmdlineRemoteTerminal c = new CmdlineRemoteTerminal(transport, reader);
+				CmdlineRemoteTerminal c = new CmdlineRemoteTerminal(transport, reader, transact);
 				c.forceProtocol(protocol);
 				// Run
 				c.run();

src/apdu4j/remote/CmdlineRemoteTerminal.java

@@ -46,9 +46,9 @@ public class CmdlineRemoteTerminal implements Runnable {
 	// The terminal that is tunneled
 	private JSONCardTerminalClient jsonterminal;
 
-	public CmdlineRemoteTerminal(JSONMessagePipe pipe, CardTerminal terminal) {
+	public CmdlineRemoteTerminal(JSONMessagePipe pipe, CardTerminal terminal, boolean transact) {
 		this.pipe = pipe;
-		this.jsonterminal = new JSONCardTerminalClient(terminal, pipe);
+		this.jsonterminal = new JSONCardTerminalClient(terminal, pipe, transact);
 	}
 
 	@Override

src/apdu4j/remote/JSONCardTerminalClient.java

@@ -40,10 +40,12 @@ class JSONCardTerminalClient {
 	private final JSONMessagePipe pipe;
 	protected Card card = null; // There can be several connects-disconnects
 	private String protocol = null; // Local protocol to use, overriding the other side
+	private boolean transact = true;
 
-	public JSONCardTerminalClient(CardTerminal terminal, JSONMessagePipe pipe) {
+	public JSONCardTerminalClient(CardTerminal terminal, JSONMessagePipe pipe, boolean transact) {
 		this.terminal = terminal;
 		this.pipe = pipe;
+		this.transact = transact;
 	}
 
 	public void forceProtocol(String protocol) {
@@ -59,7 +61,8 @@ public boolean processMessage(Map<String, Object> msg) throws IOException, CardE
 					protocol = (String) msg.get("protocol");
 				}
 				card = terminal.connect(protocol);
-				card.beginExclusive();
+				if (transact)
+					card.beginExclusive();
 				Map<String, Object> m = JSONProtocol.ok(msg);
 				m.put("atr", HexUtils.encodeHexString(card.getATR().getBytes()));
 				m.put("reader", terminal.getName());