(Tcl) 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.)

Note: This functionality was introduced in Chilkat v9.5.0.87.

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load ./chilkat.dll

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

set scard [new_CkSCard]

# First establish a context to the PC/SC Resource Manager
set success [CkSCard_EstablishContext $scard "user"]
if {$success == 0} then {
    puts [CkSCard_lastErrorText $scard]
    delete_CkSCard $scard
    exit
}

# Get JSON containing information about the smartcards currently inserted into readers.
# This also includes information about USB security tokens.
set json [new_CkJsonObject]

set success [CkSCard_FindSmartcards $scard $json]
if {$success == 0} then {
    puts [CkSCard_lastErrorText $scard]
    delete_CkSCard $scard
    delete_CkJsonObject $json
    exit
}

CkJsonObject_put_EmitCompact $json 0
puts [CkJsonObject_emit $json]

# 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

set i 0
set count_i [CkJsonObject_SizeOfArray $json "reader"]
while {$i < $count_i} {
    CkJsonObject_put_I $json $i
    set name [CkJsonObject_stringOf $json "reader[i].name"]
    set state [CkJsonObject_stringOf $json "reader[i].state"]
    set vendorName [CkJsonObject_stringOf $json "reader[i].vendorName"]
    set systemName [CkJsonObject_stringOf $json "reader[i].systemName"]
    set cardAtr [CkJsonObject_stringOf $json "reader[i].card.atr"]
    set cardWindowsMiniDriver [CkJsonObject_stringOf $json "reader[i].card.windows.miniDriver"]
    set cardWindowsCryptoProvider [CkJsonObject_stringOf $json "reader[i].card.windows.cryptoProvider"]
    set cardWindowsKeyStorageProvider [CkJsonObject_stringOf $json "reader[i].card.windows.keyStorageProvider"]
    set serialNumber [CkJsonObject_stringOf $json "reader[i].serialNumber"]
    set i [expr $i + 1]
}

# Applications should always release the context when finished.
set success [CkSCard_ReleaseContext $scard]
if {$success == 0} then {
    puts [CkSCard_lastErrorText $scard]
}


delete_CkSCard $scard
delete_CkJsonObject $json