Shell script that repeats simple smart card operations many times. May be used to measure smart card performance or reliability.

cardtest.sh

#!/bin/bash
# pkcs15-tool --list-keys
# Private RSA Key [Digital Signature]: ID: 11

TEMPFILE=`mktemp`

# reading PIN into environment variable is NOT safe, DO NOT use on shared computer.
# read is built-in, manual can be shown with
# help read
read -e -s -p "PIN: " PIN

# history is written only in interactive shell, turning it off is not needed
# set -o history

for cycle in {1..60}; do
	# create a message that don't need any padding - 256 bytes
	cat /dev/urandom | head -c 256 > $TEMPFILE
	echo "Attempt no. $cycle"
	# echo is usually built-in, no need to worry about showing PIN in the process list
	# to find out if it's built in run
	# type echo
	echo "$PIN" | pkcs15-crypt --pin - --key 11 --sign --input $TEMPFILE
	if [ "$?" -ne 0 ]; then
		>&2 echo "Error while signing"
		exit 255;
	fi
done

rm $TEMPFILE