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Man Pages


Manual Reference Pages  -  PCSC-SPY (1)

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NAME

pcsc-spy - A PC/SC spy command

CONTENTS

SYNOPSIS

pcsc-spy [-n|--nocolor] [-d|--diffable] [-h|--help] [fifo_filename]

DESCRIPTION

pcsc-spy displays PC/SC calls of an application. It must be used with the libpcscspy.so library.

To be able to spy the PC/SC layer, the application flow must be modified so that all PC/SC calls are redirected. Two options are available:
- the application is linked with libpcsclite.so.1
- the application loads the libpcsclite.so.1 library using dlopen(3)

OPTIONS

-d, --diffable Remove the variable parts (like handler values) from the output so that two execution can be more easily compared.
-h, --help Display a short help text.
-n, --nocolor Disable the output colorization (if you want redirect the output in a file for example).
-v, --version Print the version of the pcsc-spy program plus a copyright, a list of authors.

EXAMPLES

    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



FILES

~/pcsc-spy FIFO file is used by libpcsclite.so.1 to send the raw log lines

SEE ALSO

pcscd(8)

AUTHOR

This manual page was written by Ludovic Rousseau <rousseau@free.fr>
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pcsc-lite 1.8.15 PCSC-SPY (1) 2015-04-10

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