Hello,
On 12/06/2015 16:33, Ludovic Rousseau wrote:
> Are you using threads in your application?
Yes
> Does each thread use its own PC/SC context (SCardEstablishContext)?
No, we use javax.smartcardio based on SCardEstablishContext called by
PCSCTerminals.initContext().
initContext() is called at the time the shared object (libpcsc.so*) is
opened.
The implementation of initContext() keeps the result in a singleton.
<code from="openjdk-7-fcs-src-b147-27_jun_2011">
static synchronized void initContext() throws PCSCException {
if (contextId == 0) {
contextId = SCardEstablishContext(SCARD_SCOPE_USER);
}
</code>
> Why do you use this configuration?
(DAEMON_ARGS="--max-card-handle-per-reader 1")
With the attached file PcscdTest.java, we have stressed the web
application over ab (apache2-utils), and we
have determined that this configuration
On 12/06/2015 16:33, Ludovic Rousseau wrote:
> 2015-06-11 17:39 GMT+02:00 <[email protected]>:
>> Hello,
> Hello,
>
>> We've got some troubles with "libpcsclite". Perhaps, you could help us.
>>
>> Context :
>> ----------
>> We use 3 card readers (SCM SCR 3310) with pcscd on Debian Linux with
>> java environment.
>>
>> We 've made a regular backport from latest release of 1.8.13 (remove
>> dependencies
>> to systemd named bpo60+1oab2) on squeeze (debian 6) Linux machines.
>>
>> Here is a description of our environment, we are in a Java environment
>> (1.6.0_31) :
>> * Frontal : Apache / Tomcat
>> * Backend : Web application with API javax.smartcardio initialized with :
>> System.setProperty("sun.security.smartcardio.library",
>> /usr/lib/libpcsclite.so);
>>
>> At the frequency of 5 seconds, we monitor cards on reader (haproxy check).
>>
>> The problem :
>> Sometimes, a sigsegv occurs on libpcsclite on winscard_clnt.c:979
>> (void)pthread_mutex_unlock(¤tContextMap->mMutex);
>>
>> This sigsegv implies sudden death of Tomcat (cf java_frames).
>>
>> This part of code ( winscard_clnt.c:971) seems a bit strange :
>>
>> /* the hCard handle is now invalid
>> * -> another thread may have called SCardReleaseContext
>> * so the mMutex has been unlocked (and is now invalid)
>> * -> another thread may have called SCardDisconnect
>> * so the mMutex is STILL locked
>> * since we don't know just unlock the mutex */
>>
>> Why releasing mutex since "mMutex has been unlocked (and is now invalid)" ?
> Good point. I will check that again.
>
> Are you using threads in your application?
> Does each thread use its own PC/SC context (SCardEstablishContext)?
>
>> Here is the configuration of the machine.
>>
>> CCID driver version (dpkg -l | grep -i ccid)
>> -------------------------
>> libccid 1.3.11-2
>>
>> pcsc-lite version
>> ---------------------
>> ii libpcsclite-dev 1.8.13~bpo60+1oab2 Middleware to access a
>> smart card using PC/SC (development files)
>> ii libpcsclite1 1.8.13~bpo60+1oab2 Middleware to access a
>> smart card using PC/SC (library)
>> ii libpcsclite1-dbg 1.8.13~bpo60+1oab2 Middleware to access a
>> smart card using PC/SC (debugging symbols)
>> ii pcscd 1.8.13~bpo60+1oab2 Middleware to access
>> a smart card using PC/SC (daemon side)
>>
>> smart card reader name
>> --------------------------------
>> 0: SCM SCR 3310 [CCID Interface] 00 00
>> 1: SCM SCR 3310 [CCID Interface] 01 00
>> 2: SCM SCR 3310 [CCID Interface] 02 00
>>
>> the output of the command "/usr/sbin/pcscd --version"
>> ------------------------------------
>> pcsc-lite version 1.8.13.
>> Copyright (C) 1999-2002 by David Corcoran <[email protected]>.
>> Copyright (C) 2001-2011 by Ludovic Rousseau <[email protected]>.
>> Copyright (C) 2003-2004 by Damien Sauveron <[email protected]>.
>> Report bugs to <[email protected]>.
>> Enabled features: Linux x86_64-pc-linux-gnu serial usb libudev
>> usbdropdir=/usr/lib/pcsc/drivers ipcdir=/var/run/pcscd
>> configdir=/etc/reader.conf.d
>>
>> configuration of pcscd : /etc/default/pcscd
>> -----------------------------
>> DAEMON_ARGS="--max-card-handle-per-reader 1"
> Why do you use this configuration?
>
> Bye
>
--
Luc Mazardo
Orange Applications for Business
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import java.util.List;
import javax.smartcardio.*;
public class PcscdTest {
public static void main(String[] args) {
while (true) {
try {
// Display the list of terminals
TerminalFactory factory = TerminalFactory.getDefault();
List<CardTerminal> terminals = factory.terminals().list();
System.out.println("Terminals: " + terminals);
// Use the first terminal
for (int idx = 0; idx < terminals.size(); idx ++) {
CardTerminal terminal = terminals.get(idx);
// Connect wit hthe card
Card card = terminal.connect("*");
System.out.println("card: " + card);
CardChannel channel = card.getBasicChannel();
// Send Select Applet command
byte[] aid = {(byte)0xA0, 0x00, 0x00, 0x00, 0x62, 0x03, 0x01, 0x0C, 0x06, 0x01};
ResponseAPDU answer = channel.transmit(new CommandAPDU(0x00, 0xA4, 0x04, 0x00, aid));
System.out.println("answer: " + answer.toString());
// Send test command
answer = channel.transmit(new CommandAPDU(0x00, 0x00, 0x00, 0x00));
System.out.println("answer: " + answer.toString());
byte r[] = answer.getData();
for (int i=0; i<r.length; i++)
System.out.print((char)r[i]);
System.out.println();
// Disconnect the card
card.disconnect(false);
}
} catch(Exception e) {
if (! e.toString().matches(".*connect.*")) {
System.out.println("Ouch: " + e.toString());
System.exit(1);
}
}
}
}
}
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