DataFlex

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.

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoScard
    Variant vJson
    Handle hoJson
    String sName
    String sState
    String sVendorName
    String sSystemName
    String sCardAtr
    String sCardWindowsMiniDriver
    String sCardWindowsCryptoProvider
    String sCardWindowsKeyStorageProvider
    String sSerialNumber
    Integer i
    Integer iCount_i
    String sTemp1

    Move False To iSuccess

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

    Get Create (RefClass(cComChilkatSCard)) To hoScard
    If (Not(IsComObjectCreated(hoScard))) Begin
        Send CreateComObject of hoScard
    End

    // First establish a context to the PC/SC Resource Manager
    Get ComEstablishContext Of hoScard "user" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoScard To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Get JSON containing information about the smartcards currently inserted into readers.
    // This also includes information about USB security tokens.
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get pvComObject of hoJson to vJson
    Get ComFindSmartcards Of hoScard vJson To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoScard To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Set ComEmitCompact Of hoJson To False
    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1

    // 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

    Move 0 To i
    Get ComSizeOfArray Of hoJson "reader" To iCount_i
    While (i < iCount_i)
        Set ComI Of hoJson To i
        Get ComStringOf Of hoJson "reader[i].name" To sName
        Get ComStringOf Of hoJson "reader[i].state" To sState
        Get ComStringOf Of hoJson "reader[i].vendorName" To sVendorName
        Get ComStringOf Of hoJson "reader[i].systemName" To sSystemName
        Get ComStringOf Of hoJson "reader[i].card.atr" To sCardAtr
        Get ComStringOf Of hoJson "reader[i].card.windows.miniDriver" To sCardWindowsMiniDriver
        Get ComStringOf Of hoJson "reader[i].card.windows.cryptoProvider" To sCardWindowsCryptoProvider
        Get ComStringOf Of hoJson "reader[i].card.windows.keyStorageProvider" To sCardWindowsKeyStorageProvider
        Get ComStringOf Of hoJson "reader[i].serialNumber" To sSerialNumber
        Move (i + 1) To i
    Loop

    // Applications should always release the context when finished.
    Get ComReleaseContext Of hoScard To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoScard To sTemp1
        Showln sTemp1
    End



End_Procedure