(Ruby) ScMinidriver - List Certificates on a Smart Card or USB Token

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Gets a list of certificates contained on a smart card or USB token.

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 PCSC List Readers or PCSC Find Smart Cards
readerName = "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0"
success = scmd.AcquireContext(readerName)
if (success == false)
    print scmd.lastErrorText() + "\n";
    exit
end

stCerts = Chilkat::CkStringTable.new()

# We can choose one of the following items of information to get for each certificate:
# "subjectDN" -- Return the full distinguished name of the cert.
# "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
# "subjectCN" -- Return just the common name part of the certificate's subject.
# "serial" -- Return the certificate serial number.
# "serial:issuerCN" -- return the certificate serial number + the issuer's common name, delimited with a colon char.
certPart = "subjectCN"

success = scmd.ListCerts(certPart,stCerts)
if (success == false)
    print scmd.lastErrorText() + "\n";
    exit
end

numCerts = stCerts.get_Count()
i = 0
while i < numCerts
    print i.to_s() + ": " + stCerts.stringAt(i) + "\n";
    i = i + 1
end

# Delete the context when finished with the card.
success = scmd.DeleteContext()
if (success == false)
    print scmd.lastErrorText() + "\n";
end