(Objective-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

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#import <NSString.h>
#import <CkoHttp.h>
#import <CkoHttpRequest.h>
#import <CkoHttpResponse.h>
#import <CkoJsonObject.h>

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

NSString *integrationKey = @"DIMS3V5QDVG9J9ABRXC4";
NSString *secretKey = @"HWVQ46nubLBxhnRlKddTltWIi3hL0fIQF2qTvLab";

CkoHttp *http = [[CkoHttp alloc] init];

http.Accept = @"application/json";

// Use your own hostname here:
NSString *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.
http.Login = integrationKey;
http.Password = secretKey;

CkoHttpRequest *req = [[CkoHttpRequest alloc] init];
[req AddParam: @"username" value: @"matt"];

CkoHttpResponse *resp = [http PostUrlEncoded: url req: req];
if (http.LastMethodSuccess == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

NSLog(@"%@%d",@"status code = ",[resp.StatusCode intValue]);

CkoJsonObject *json = [[CkoJsonObject alloc] init];
BOOL success = [json Load: resp.BodyStr];
json.EmitCompact = NO;
NSLog(@"%@",[json Emit]);

// 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

NSString *device = 0;
NSString *display_name = 0;
NSString *name = 0;
NSString *number = 0;
NSString *v_type = 0;
int j;
int count_j;
NSString *strVal = 0;

NSString *responseResult = [json StringOf: @"response.result"];
NSString *responseStatus_msg = [json StringOf: @"response.status_msg"];
NSString *stat = [json StringOf: @"stat"];
int i = 0;
int count_i = [[json SizeOfArray: @"response.devices"] intValue];
while (i < count_i) {
    json.I = [NSNumber numberWithInt: i];
    device = [json StringOf: @"response.devices[i].device"];
    display_name = [json StringOf: @"response.devices[i].display_name"];
    name = [json StringOf: @"response.devices[i].name"];
    number = [json StringOf: @"response.devices[i].number"];
    v_type = [json StringOf: @"response.devices[i].type"];
    j = 0;
    count_j = [[json SizeOfArray: @"response.devices[i].capabilities"] intValue];
    while (j < count_j) {
        json.J = [NSNumber numberWithInt: j];
        strVal = [json StringOf: @"response.devices[i].capabilities[j]"];
        j = j + 1;
    }

    i = i + 1;
}