Xbase++

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.

Xbase++

LOCAL nSuccess
LOCAL oScard
LOCAL oJson
LOCAL cName
LOCAL cState
LOCAL cVendorName
LOCAL cSystemName
LOCAL cCardAtr
LOCAL cCardWindowsMiniDriver
LOCAL cCardWindowsCryptoProvider
LOCAL cCardWindowsKeyStorageProvider
LOCAL cSerialNumber
LOCAL i
LOCAL nCount_i

nSuccess := 0

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

oScard := CreateObject("Chilkat.SCard")

//  First establish a context to the PC/SC Resource Manager
nSuccess := oScard:EstablishContext("user")
IF (nSuccess == 0)
    ? oScard:LastErrorText
    oScard:destroy()
    RETURN
ENDIF

//  Get JSON containing information about the smartcards currently inserted into readers.
//  This also includes information about USB security tokens.
oJson := CreateObject("Chilkat.JsonObject")
nSuccess := oScard:FindSmartcards(oJson)
IF (nSuccess == 0)
    ? oScard:LastErrorText
    oScard:destroy()
    oJson:destroy()
    RETURN
ENDIF

oJson:EmitCompact := 0
? oJson: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

i := 0
nCount_i := oJson:SizeOfArray("reader")
DO WHILE i < nCount_i
    oJson:I := i
    cName := oJson:StringOf("reader[i].name")
    cState := oJson:StringOf("reader[i].state")
    cVendorName := oJson:StringOf("reader[i].vendorName")
    cSystemName := oJson:StringOf("reader[i].systemName")
    cCardAtr := oJson:StringOf("reader[i].card.atr")
    cCardWindowsMiniDriver := oJson:StringOf("reader[i].card.windows.miniDriver")
    cCardWindowsCryptoProvider := oJson:StringOf("reader[i].card.windows.cryptoProvider")
    cCardWindowsKeyStorageProvider := oJson:StringOf("reader[i].card.windows.keyStorageProvider")
    cSerialNumber := oJson:StringOf("reader[i].serialNumber")
    i := i + 1
ENDDO

//  Applications should always release the context when finished.
nSuccess := oScard:ReleaseContext()
IF (nSuccess == 0)
    ? oScard:LastErrorText
ENDIF

oScard:destroy()
oJson:destroy()