(C) Duo Auth API - Preauth

See more Duo Auth MFA Examples

The /preauth endpoint determines whether a user is authorized to log in, and (if so) returns the user's available authentication factors.

Note: This example requires Chilkat v9.5.0.89 or greater.

For more information, see https://duo.com/docs/authapi#/preauth

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <C_CkHttp.h>
#include <C_CkHttpRequest.h>
#include <C_CkHttpResponse.h>
#include <C_CkJsonObject.h>

void ChilkatSample(void)
    {
    const char *integrationKey;
    const char *secretKey;
    HCkHttp http;
    const char *url;
    HCkHttpRequest req;
    HCkHttpResponse resp;
    HCkJsonObject json;
    BOOL success;
    const char *device;
    const char *display_name;
    const char *name;
    const char *number;
    const char *v_type;
    int j;
    int count_j;
    const char *strVal;
    const char *responseResult;
    const char *responseStatus_msg;
    const char *stat;
    int i;
    int count_i;

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

    integrationKey = "DIMS3V5QDVG9J9ABRXC4";
    secretKey = "HWVQ46nubLBxhnRlKddTltWIi3hL0fIQF2qTvLab";

    http = CkHttp_Create();

    CkHttp_putAccept(http,"application/json");

    // Use your own hostname here:
    url = "https://api-a03782e1.duosecurity.com/auth/v2/preauth";

    // This example requires Chilkat v9.5.0.89 or greater because Chilkat will automatically
    // generate and send the HMAC signature for the requires based on the integration key and secret key.
    CkHttp_putLogin(http,integrationKey);
    CkHttp_putPassword(http,secretKey);

    req = CkHttpRequest_Create();
    CkHttpRequest_AddParam(req,"username","matt");

    resp = CkHttp_PostUrlEncoded(http,url,req);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpRequest_Dispose(req);
        return;
    }

    printf("status code = %d\n",CkHttpResponse_getStatusCode(resp));

    json = CkJsonObject_Create();
    success = CkJsonObject_Load(json,CkHttpResponse_bodyStr(resp));
    CkJsonObject_putEmitCompact(json,FALSE);
    printf("%s\n",CkJsonObject_emit(json));

    CkHttpResponse_Dispose(resp);

    // Sample successful output:

    // status code = 200

    // {
    //   "response": {
    //     "devices": [
    //       {
    //         "capabilities": [
    //           "auto",
    //           "push",
    //           "sms",
    //           "mobile_otp"
    //         ],
    //         "device": "DP6GYVTQ5NK82BMR851F",
    //         "display_name": "iOS (XXX-XXX-1871)",
    //         "name": "",
    //         "number": "XXX-XXX-1871",
    //         "type": "phone"
    //       }
    //     ],
    //     "result": "auth",
    //     "status_msg": "Account is active"
    //   },
    //   "stat": "OK"
    // }

    // Sample code to parse the above JSON response..

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

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    responseResult = CkJsonObject_stringOf(json,"response.result");
    responseStatus_msg = CkJsonObject_stringOf(json,"response.status_msg");
    stat = CkJsonObject_stringOf(json,"stat");
    i = 0;
    count_i = CkJsonObject_SizeOfArray(json,"response.devices");
    while (i < count_i) {
        CkJsonObject_putI(json,i);
        device = CkJsonObject_stringOf(json,"response.devices[i].device");
        display_name = CkJsonObject_stringOf(json,"response.devices[i].display_name");
        name = CkJsonObject_stringOf(json,"response.devices[i].name");
        number = CkJsonObject_stringOf(json,"response.devices[i].number");
        v_type = CkJsonObject_stringOf(json,"response.devices[i].type");
        j = 0;
        count_j = CkJsonObject_SizeOfArray(json,"response.devices[i].capabilities");
        while (j < count_j) {
            CkJsonObject_putJ(json,j);
            strVal = CkJsonObject_stringOf(json,"response.devices[i].capabilities[j]");
            j = j + 1;
        }

        i = i + 1;
    }



    CkHttp_Dispose(http);
    CkHttpRequest_Dispose(req);
    CkJsonObject_Dispose(json);

    }