Lua Requires Chilkat v9.5.0.87+

PC/SC Find Inserted Smart Cards

See more SCard Examples

Get detailed information about each reader including whether or not a smart card is currently inserted in the reader. (Also includes USB tokens.) Lua

local chilkat = require("chilkat")

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

local scard = chilkat.SCard.new()

-- First establish a context to the PC/SC Resource Manager
local success = scard:establish_context("user")
if not success then
    print(scard.last_error_text)
    return
end

-- Get JSON containing information about the smartcards currently inserted into readers.
-- This also includes information about USB security tokens.
local json = chilkat.JsonObject.new()
success = scard:find_smartcards(json)
if not success then
    print(scard.last_error_text)
    return
end

json.emit_compact = false
print(json:emit())

-- Here is sample output:
-- See below for sample code to parse the JSON.

-- You can see which readers have a card inserted by the "state".
-- If the state contains "present", then a card is inserted into the reader.
-- (USB tokens will typically always have a state containing "present")
-- Also, the ATR of the card inserted into the reader is indicated by "atr".

-- {
--   "reader": [
--     {
--       "name": "Alcor Micro USB Smart Card Reader 0",
--       "state": "present,inuse",
--       "vendorName": "Alcor Micro",
--       "systemName": "Alcor Micro USB Smart Card Reader 0",
--       "card": {
--         "atr": "3B7F96000080318065B0855956FB120FFE829000",
--         "windows": {
--           "miniDriver": "AxaltoCM.dll",
--           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
--           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
--         }
--       }
--     },
--     {
--       "name": "FS USB Token 0",
--       "state": "present,inuse",
--       "vendorName": "FS",
--       "serialNumber": "3F",
--       "systemName": "FS USB Token 0",
--       "card": {
--         "atr": "3B9F958131FE9F006646530534002571DF000000000012",
--         "windows": {
--           "miniDriver": "eps2003csp11",
--           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
--           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
--         }
--       }
--     },
--     {
--       "name": "FT Java Token 0",
--       "state": "present",
--       "vendorName": "FT",
--       "serialNumber": "3F",
--       "systemName": "FT Java Token 0",
--       "card": {
--         "atr": "3BFC180000813180459067464A00642D70C172FEE0FE",
--         "windows": {
--           "miniDriver": "tagliov70px.dll",
--           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
--           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
--         }
--       }
--     },
--     {
--       "name": "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0",
--       "state": "present",
--       "vendorName": "SCM Microsystems Inc.",
--       "serialNumber": "333130303330",
--       "systemName": "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0",
--       "card": {
--         "atr": "3BFC180000813180459067464A00641606F2727E00E0",
--         "windows": {
--           "miniDriver": "tagliov70px.dll",
--           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
--           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
--         }
--       }
--     },
--     {
--       "name": "Yubico YubiKey OTP+FIDO+CCID 0",
--       "state": "present",
--       "vendorName": "Yubico",
--       "serialNumber": "3F",
--       "systemName": "Yubico YubiKey OTP+FIDO+CCID 0",
--       "card": {
--         "atr": "3BFD1300008131FE158073C021C057597562694B657940",
--         "windows": {
--           "miniDriver": "msclmd.dll",
--           "cryptoProvider": "Microsoft Base Smart Card Crypto Provider",
--           "keyStorageProvider": "Microsoft Smart Card Key Storage Provider"
--         }
--       }
--     }
--   ]
-- }

-- Use this online tool to generate parsing code from sample JSON:
-- Generate Parsing Code from JSON

local name = ""
local state = ""
local vendorName = ""
local systemName = ""
local cardAtr = ""
local cardWindowsMiniDriver = ""
local cardWindowsCryptoProvider = ""
local cardWindowsKeyStorageProvider = ""
local serialNumber = ""

local i = 0
local count_i = json:size_of_array("reader")
while i < count_i do
    json.i = i
    name = json:string_of("reader[i].name")
    state = json:string_of("reader[i].state")
    vendorName = json:string_of("reader[i].vendorName")
    systemName = json:string_of("reader[i].systemName")
    cardAtr = json:string_of("reader[i].card.atr")
    cardWindowsMiniDriver = json:string_of("reader[i].card.windows.miniDriver")
    cardWindowsCryptoProvider = json:string_of("reader[i].card.windows.cryptoProvider")
    cardWindowsKeyStorageProvider = json:string_of("reader[i].card.windows.keyStorageProvider")
    serialNumber = json:string_of("reader[i].serialNumber")
    i = i + 1
end

-- Applications should always release the context when finished.
success = scard:release_context()
if not success then
    print(scard.last_error_text)
end