(Ruby) ScMinidriver - Change Smart Card PIN (or USB token PIN)

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Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

scmd = Chilkat::CkScMinidriver.new()

# Reader names (smart card readers or USB tokens) can be discovered
# via List Readers or Find Smart Cards
readerName = "Alcor Micro USB Smart Card Reader 0"
success = scmd.AcquireContext(readerName)
if (success == false)
    print scmd.lastErrorText() + "\n";
    exit
end

# If successful, the name of the currently inserted smart card is available:
print "Card name: " + scmd.cardName() + "\n";

# Change the "user" PIN.  (Typically, you'll always be using the "user" PIN.)
currentPin = "0000"
newPin = "1234"
retval = scmd.PinChange("user",currentPin,newPin)
if (retval == -1)
    print "The PIN is already blocked." + "\n";
    exit
end

if (retval == -2)
    print "The PinChange function failed for some unanticipated reason" + "\n";
    print scmd.lastErrorText() + "\n";
    exit
end

if (retval == 0)
    print "PIN successfully changed." + "\n";
else
    print "Current PIN is incorrect." + "\n";
    print "Number of attempts remaining = " + retval.to_s() + "\n";
end

scmd.DeleteContext()