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(Go) PKCS11 Discover Readers and Smart Cards / Tokens

See more PKCS11 Examples

Example showing how to discover the readers (slots) and smart cards and tokens available through a vendor's PKCS11 Cryptoki module.

Note: This example requires Chilkat v9.5.0.88 or later.

Chilkat Go Downloads

Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    // Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

    pkcs11 := chilkat.NewPkcs11()

    // Specify the vendor's Cryptoki module DLL / shared lib.
    pkcs11.SetSharedLibPath("aetpkss1.dll")

    success := pkcs11.Initialize()
    if success == false {
        fmt.Println(pkcs11.LastErrorText())
        pkcs11.DisposePkcs11()
        return
    }

    // Call Discover to discover what's available.
    // Indicate that we only want to return slots (readers) where tokens (smart cards) are present.
    // (If the device is a USB token, such as an ePass300Auto, then by definition it has a "token" present.)
    onlyTokensPresent := true
    json := chilkat.NewJsonObject()
    success = pkcs11.Discover(onlyTokensPresent,json)
    if success == false {
        fmt.Println(pkcs11.LastErrorText())
        pkcs11.DisposePkcs11()
        json.DisposeJsonObject()
        return
    }

    json.SetEmitCompact(false)
    fmt.Println(*json.Emit())

    // Sample JSON output.
    // Code for parsing this JSON is shown below..

    // {
    //   "cryptokiVersion": {
    //     "major": 2,
    //     "minor": 20
    //   },
    //   "manufacturerID": "A.E.T. Europe B.V.",
    //   "libraryDescription": "Cryptographic Token Interface",
    //   "libraryVersion": {
    //     "major": 3,
    //     "minor": 0
    //   },
    //   "slot": [
    //     {
    //       "id": 52482,
    //       "slotDescription": "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0",
    //       "manufacturerID": "SCM Microsystems Inc. SCR33x USB",
    //       "tokenPresent": true,
    //       "removableDevice": true,
    //       "hardwareSlot": true,
    //       "hardwareVersion": {
    //         "major": 0,
    //         "minor": 0
    //       },
    //       "firmwareVersion": {
    //         "major": 0,
    //         "minor": 0
    //       },
    //       "token": {
    //         "label": "chilkat",
    //         "manufacturerID": "A.E.T. Europe B.V.",
    //         "model": "19C40406010D00C0",
    //         "serialNumber": "21619600583C4505",
    //         "flags": [
    //           "CKF_RNG",
    //           "CKF_LOGIN_REQUIRED",
    //           "CKF_USER_PIN_INITIALIZED",
    //           "CKF_TOKEN_INITIALIZED"
    //         ],
    //         "maxSessionCount": 126,
    //         "sessionCount": 0,
    //         "maxRwSessionCount": 126,
    //         "rwSessionCount": 0,
    //         "maxPinLen": 15,
    //         "minPinLen": 4,
    //         "totalPublicMemory": 32767,
    //         "freePublicMemory": 32767,
    //         "totalPrivateMemory": 32767,
    //         "freePrivateMemory": 32767,
    //         "hardwareVersion": {
    //           "major": 0,
    //           "minor": 0
    //         },
    //         "firmwareVersion": {
    //           "major": 0,
    //           "minor": 0
    //         },
    //         "utcTime": "",
    //         "rsa": {
    //           "minKeySize": 768,
    //           "maxKeySize": 2048
    //         },
    //         "mechanism": [
    //           "CKM_RSA_PKCS",
    //           "CKM_RSA_X_509",
    //           "CKM_RSA_PKCS_OAEP",
    //           "CKM_MD5_RSA_PKCS",
    //           "CKM_SHA1_RSA_PKCS",
    //           "CKM_SHA224_RSA_PKCS",
    //           "CKM_SHA256_RSA_PKCS",
    //           "CKM_SHA384_RSA_PKCS",
    //           "CKM_SHA512_RSA_PKCS",
    //           "CKM_RIPEMD160_RSA_PKCS",
    //           "CKM_CPK_ECDSA",
    //           "CKM_CPK_ECDSA_SHA1",
    //           "CKM_CPK_ECIES",
    //           "CKM_CPK_ECIES_STDDH_SHA1KDF_DES3CBC_PAD_SHA1HMAC",
    //           "CKM_CPK_ECIES_STDDH_SHA1KDF_AES128CBC_PAD_SHA1HMAC",
    //           "CKM_CPK_PKCS7_SIGNED",
    //           "CKM_CPK_PKCS7_ENVELOPE_DES3CBC_PAD",
    //           "CKM_RSA_PKCS_PSS",
    //           "CKM_RSA_PKCS_KEY_PAIR_GEN",
    //           "CKM_RC2_KEY_GEN",
    //           "CKM_RC2_ECB",
    //           "CKM_RC2_CBC",
    //           "CKM_RC2_CBC_PAD",
    //           "CKM_RC4_KEY_GEN",
    //           "CKM_RC4",
    //           "CKM_DES_KEY_GEN",
    //           "CKM_DES2_KEY_GEN",
    //           "CKM_DES3_KEY_GEN",
    //           "CKM_DES_ECB",
    //           "CKM_DES_CBC",
    //           "CKM_DES3_ECB",
    //           "CKM_DES3_CBC",
    //           "CKM_DES_CBC_PAD",
    //           "CKM_DES3_CBC_PAD",
    //           "CKM_MD5",
    //           "CKM_SHA_1",
    //           "CKM_SHA224",
    //           "CKM_SHA256",
    //           "CKM_SHA384",
    //           "CKM_SHA512",
    //           "CKM_RIPEMD160"
    //         ]
    //       }
    //     }
    //   ]
    // }

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

    var id int
    var slotDescription *string = new(string)
    var tokenPresent bool
    var removableDevice bool
    var hardwareSlot bool
    var hardwareVersionMajor int
    var hardwareVersionMinor int
    var firmwareVersionMajor int
    var firmwareVersionMinor int
    var tokenLabel *string = new(string)
    var tokenManufacturerID *string = new(string)
    var tokenModel *string = new(string)
    var tokenSerialNumber *string = new(string)
    var tokenMaxSessionCount int
    var tokenSessionCount int
    var tokenMaxRwSessionCount int
    var tokenRwSessionCount int
    var tokenMaxPinLen int
    var tokenMinPinLen int
    var tokenTotalPublicMemory int
    var tokenFreePublicMemory int
    var tokenTotalPrivateMemory int
    var tokenFreePrivateMemory int
    var tokenHardwareVersionMajor int
    var tokenHardwareVersionMinor int
    var tokenFirmwareVersionMajor int
    var tokenFirmwareVersionMinor int
    var tokenUtcTime *string = new(string)
    var tokenRsaMinKeySize int
    var tokenRsaMaxKeySize int
    var j int
    var count_j int
    var strVal *string = new(string)

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

    cryptokiVersionMajor := json.IntOf("cryptokiVersion.major")
    cryptokiVersionMinor := json.IntOf("cryptokiVersion.minor")
    manufacturerID := json.StringOf("manufacturerID")
    libraryDescription := json.StringOf("libraryDescription")
    libraryVersionMajor := json.IntOf("libraryVersion.major")
    libraryVersionMinor := json.IntOf("libraryVersion.minor")
    i := 0
    count_i := json.SizeOfArray("slot")
    for i < count_i {
        json.SetI(i)
        id = json.IntOf("slot[i].id")
        slotDescription = json.StringOf("slot[i].slotDescription")
        manufacturerID = json.StringOf("slot[i].manufacturerID")
        tokenPresent = json.BoolOf("slot[i].tokenPresent")
        removableDevice = json.BoolOf("slot[i].removableDevice")
        hardwareSlot = json.BoolOf("slot[i].hardwareSlot")
        hardwareVersionMajor = json.IntOf("slot[i].hardwareVersion.major")
        hardwareVersionMinor = json.IntOf("slot[i].hardwareVersion.minor")
        firmwareVersionMajor = json.IntOf("slot[i].firmwareVersion.major")
        firmwareVersionMinor = json.IntOf("slot[i].firmwareVersion.minor")
        tokenLabel = json.StringOf("slot[i].token.label")
        tokenManufacturerID = json.StringOf("slot[i].token.manufacturerID")
        tokenModel = json.StringOf("slot[i].token.model")
        tokenSerialNumber = json.StringOf("slot[i].token.serialNumber")
        tokenMaxSessionCount = json.IntOf("slot[i].token.maxSessionCount")
        tokenSessionCount = json.IntOf("slot[i].token.sessionCount")
        tokenMaxRwSessionCount = json.IntOf("slot[i].token.maxRwSessionCount")
        tokenRwSessionCount = json.IntOf("slot[i].token.rwSessionCount")
        tokenMaxPinLen = json.IntOf("slot[i].token.maxPinLen")
        tokenMinPinLen = json.IntOf("slot[i].token.minPinLen")
        tokenTotalPublicMemory = json.IntOf("slot[i].token.totalPublicMemory")
        tokenFreePublicMemory = json.IntOf("slot[i].token.freePublicMemory")
        tokenTotalPrivateMemory = json.IntOf("slot[i].token.totalPrivateMemory")
        tokenFreePrivateMemory = json.IntOf("slot[i].token.freePrivateMemory")
        tokenHardwareVersionMajor = json.IntOf("slot[i].token.hardwareVersion.major")
        tokenHardwareVersionMinor = json.IntOf("slot[i].token.hardwareVersion.minor")
        tokenFirmwareVersionMajor = json.IntOf("slot[i].token.firmwareVersion.major")
        tokenFirmwareVersionMinor = json.IntOf("slot[i].token.firmwareVersion.minor")
        tokenUtcTime = json.StringOf("slot[i].token.utcTime")
        tokenRsaMinKeySize = json.IntOf("slot[i].token.rsa.minKeySize")
        tokenRsaMaxKeySize = json.IntOf("slot[i].token.rsa.maxKeySize")
        j = 0
        count_j = json.SizeOfArray("slot[i].token.flags")
        for j < count_j {
            json.SetJ(j)
            strVal = json.StringOf("slot[i].token.flags[j]")
            j = j + 1
        }

        j = 0
        count_j = json.SizeOfArray("slot[i].token.mechanism")
        for j < count_j {
            json.SetJ(j)
            strVal = json.StringOf("slot[i].token.mechanism[j]")
            j = j + 1
        }

        i = i + 1
    }


    pkcs11.DisposePkcs11()
    json.DisposeJsonObject()

 

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