HelloWorld.cs with Mutual Auth throws error in X509Certificate2 call

[MatriXz]

Hi

Im using Visa Direct, and trying to implement the HelloWorld.cs functionality into my MVC Core project, to test it out on my site. 

The line when you call:

var certificate = new X509Certificate2(certificatePath, certificatePassword);

throws an exception: "System.Security.Cryptography.CryptographicException: 'The system cannot find the path specified.'"

I put the cert.pem file into my project under a custom folder called Utils. and set the path to point at that like this: "~/Utils/cert.pem". 

What am I doing wrong? 

[SyedSa]

Hi @MatriXz, Thank you for reaching out. One of our agents will look into this and get back to you soon. Until then, if any community members know a solution, please feel free to reply to this thread.

[API_Managers]

Hi @MatriXz,

To further investigate, please provide the following information:

1. End Point
2. Request Header
3. Request Body
4. Response Header (include the x-correlation-id)
5. Response Body

You can find the x-correlation-id in the response header.

[MatriXz]

Hi,

I honestly have no idea what to reply here.

I think the endpoint is: "https://sandbox.api.visa.com/vdp/helloworld", it works perfectly in postman, using the same credentials, certificates etc.

In my project i created a simple button that calls this controller method:

[HttpPost]

public ActionResult BuyRows(string rowData) {
var visa = new Visa();
var response = visa.DoMutualAuthCall("vdp/helloworld", "GET", null, null, null);
return Json(response);
}

The class Visa is a copy paste of the Helloworld.cs file from your sample code collection. Slightly changed the logging method, and filled in the username etc. 

This is the code: 

As you can see I get an unhandled exception when it comes to this line. The request hasnt even been done yet. Hope its possible to read the screenshot. 

[MatriXz]

Using some Copilot assistance I figured out what the problem was.. Its the Absolute path of the Cert.Pem file location that was the issue..

Solution:

string certificatePath = Path.Combine(Directory.GetCurrentDirectory(), "Utils", "cert.pem");

However, now I am getting to the request.GetResponse() part. Im getting an error 400 (bad request)

Details i know:

Url: "https://sandbox.api.visa.com/vdp/helloworld"

Method: "GET"

I call this method like this:

new Visa().DoMutualAuthCall("vdp/helloworld", "GET", null, null, null);

Any idea what I am doing wrong ?

All Searches say that something is not correct in the request.Header, or url is incorrect. But its copied from the documentation, and works in postman, so not that imo. 

[API_Managers]

HI @MatriXz,

HTTP STATUS	HTTP CODE	CAUSE/RESOLUTION
BAD REQUEST	400	This error could be due to a variety of reasons. Check for the following: The url has a space after the ?. Whitespace issues, in general, anywhere in the url. Ideally the following fields need to be checked for correctness:  URL  Query params Or The API endpoint you are trying to use only supports Two-Way SSL authentication. Please ensure you are not using any other token type. Or Invalid input found in the request payload.

[vrm]

hi @MatriXz 

i'm using node js to connect to VISA network. one thing i forgot in the first try, was including username and password in headers. in nodejs it is as follows:

'Authorization': 'Basic ' + new Buffer(userId + ':' + password).toString('base64')

this must be present in headers section. maybe you are facing the same issue