(MFC) List Keys in a Microsoft Storage Provider

Demonstrates how to list the keys found in a Microsoft CNG Storage Provider, or a Legacy CryptoAPI Storage Provider.

Important: This example requires Chilkat v9.5.0.83 or greater.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkKeyContainer.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example requires Chilkat v9.5.0.83 or greater.

    CkKeyContainer keyCon;
    CkJsonObject json;
    json.put_EmitCompact(false);

    bool success = keyCon.GetKeys("Microsoft Software Key Storage Provider",json);
    if (success != true) {
        strOut.append(keyCon.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    strOut.append(json.emit());
    strOut.append("\r\n");

    // Sample JSON returned by GetKeys

    // If the storage provider is CNG, then each key has an "algId".
    // If the storage provider is legacy CryptoAPI, then each key has a "provType" (see below)

    // If the storage provider is CNG:
    // {
    //   "storageProvider": "Microsoft Software Key Storage Provider",
    //   "key": [
    //     {
    //       "name": "cn=Chilkat Admin,ou=Persona Not Verified,ou=For Test Purposes Only Decryption Key",
    //       "machineKey": false,
    //       "algId": "ECDH_P384"
    //     },
    //     {
    //       "name": "CD1CC265-0DA0-4230-8419-CB6F808FE688",
    //       "machineKey": false,
    //       "algId": "SP800_108_CTR_HMAC"
    //     },
    //     {
    //       "name": "{FF14487C-0AED-471E-8FAD-4BF757C2195C}",
    //       "machineKey": false,
    //       "algId": "ECDH_P256"
    //     },
    //     {
    //       "name": "{869FD9A6-D815-44FD-A916-4D4A708CD949}",
    //       "machineKey": false,
    //       "algId": "ECDH_P256"
    //     },
    //     {
    //       "name": "D530ECA9-FF5A-4A6A-AAB3-6EC1870F2CC3",
    //       "machineKey": false,
    //       "algId": "SP800_108_CTR_HMAC"
    //     },
    //     {
    //       "name": "{F524771E-93C0-4D56-8DE7-2FE3CB5BD837}",
    //       "machineKey": false,
    //       "algId": "RSA"
    //     },
    //     {
    //       "name": "Microsoft Connected Devices Platform device certificate",
    //       "machineKey": false,
    //       "algId": "ECDSA_P256"
    //     }
    //   ]
    // }

    // If the storage provider is legacy CryptoAPI:

    // {
    //   "storageProvider": "Microsoft Base Cryptographic Provider v1.0",
    //   "key": [
    //     {
    //       "name": "{48D7FF88-A52E-41E2-9EBD-0CC7E880DC65}",
    //       "machineKey": false,
    //       "provType": "PROV_RSA_FULL"
    //     },
    //     {
    //       "name": "{CBF7A33A-F9CF-4C30-8A06-94A5C7981058}",
    //       "machineKey": false,
    //       "provType": "PROV_RSA_FULL"
    //     }
    //   ]
    // }

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

    const char *name = 0;
    bool machineKey;
    const char *algId = 0;
    const char *provType = 0;

    const char *storageProvider = json.stringOf("storageProvider");
    int i = 0;
    int count_i = json.SizeOfArray("key");
    while (i < count_i) {
        json.put_I(i);
        name = json.stringOf("key[i].name");
        machineKey = json.BoolOf("key[i].machineKey");
        if (json.HasMember("key[i].algId") == true) {
            algId = json.stringOf("key[i].algId");
        }

        if (json.HasMember("key[i].provType") == true) {
            provType = json.stringOf("key[i].provType");
        }

        i = i + 1;
    }



    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }