Applications linked with libpcsclite.so.1¶

We will use the standard LD_PRELOAD loader option to load our spying library.

Example:
LD_PRELOAD=/usr/lib/libpcscspy.so pcsc_scan

Application loading libpcsclite.so.1¶

This is the case for the PC/SC wrappers like pyscard (for Python) and pcsc-perl (for Perl). The LD_PRELOAD mechanism can't be used. Instead we replace the libpcsclite.so.1 library by the spying one.

You may use install_spy.sh and uninstall_spy.sh to install and uninstall the spying library.

Using the spying library without pcsc-spy is not a problem but has side effects:

- a line "libpcsclite_nospy.so.1: cannot open shared object file: No such file or directory" will be displayed

- some CPU time will be lost because of the PC/SC calls redirection

Starting the spy tool¶

 pcsc-spy

If a command argument is passed we use it instead of the default ~/pcsc-spy FIFO file. It is then possible to record an execution log and use pcsc-spy multiple times on the same log.

To create the log file just do:

 mkfifo ~/pcsc-spy
 cat ~/pcsc-spy > logfile

and run your PC/SC application.

Mac OS X¶

The installation is not automatic. In the pcsc-lite/src/spy directory do:
make framework

Then copy the PCSC.framework directory in /tmp
cp -a PCSC.framework /tmp

Copy the official PCSC.framework (binary only) in /tmp
cp /System/Library/Frameworks/PCSC.framework/PCSC /tmp

Run the application to debug as:
DYLD_FRAMEWORK_PATH=/tmp pcsctest