Android Certificate Download For User

• Android Certificate Download For User Guide
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Disclaimer: I am new to Xamarin/cross platform development so some of my assumptions may raise a few eyebrows

Installing an SSL Certificate on an Android Device (Manually). If you did not download the certificate file on the Android device that you are installing it on, you must transfer the certificate file to that device (e.g. Via transfer cable or email). If the certificate is present in the list of User certificates, then the certificate. Dec 01, 2016  How to retrieve user certificates. (Windows PCs, Android and iOS devices) that will be authorized to communicate with the server. At execution time, our client application would use the already deployed/installed certificate in order to communicate with the server. (which I don't care about ) using the KeyStore API and the user. Since API 24 (Android 7.0) you have check it in. Setting-Security-User Credentials. Where you can list all of users certificates. Below API 24 there is no option in settings to show user certificates (PKCS12 with private key).

Hi,
We are building a cross platform client application that needs to communicate with a server over WebSockets. The server requires the client to present a certificate when connecting (in addition to a username and password).
For the WebSocket communication we are using websocket-sharp (https://github.com/sta/websocket-sharp) which allows us to pass in the client certificate to use.
From an operational point of view, we would like to pre-install the 'client' certificates on the devices (Windows PCs, Android and iOS devices) that will be authorized to communicate with the server. At execution time, our client application would use the already deployed/installed certificate in order to communicate with the server.

For testing purposes, I have created a few self-signed certificates and installed them on a PC and a few Android devices (diff API levels). In the future we would probably purchase certificates issued by a trusted CA, but, for now/development, self-signed should be enough (I would hope so anyway ).

Here is who I am trying to retrieve the certificate:

We make sure that the cryptographic signatures for new versions of all previously published apps match the original ones, which means we know if the new version APKs were signed by the real devs or someone pretending to be them.3. For new apps that have never been published on appforpc1.com, we try to match the signatures to other existing apps by the same developer. Download neobux app for android free.

var store = new X509Store(StoreName.My, StoreLocation.CurrentUser);
store.Open(OpenFlags.ReadOnly);
var certificates = store.Certificates; // later use these certificates with the websocket client.
store.Close();

This code works great on Windows, but it fails to retrieve anything on Android. It does not throw anything, it simply does not return anything. The store.StoreHandle is zero when executed on Android, which leads me be to believe that it failed to retrieve a reference to the actual store.
I have tried different store names/locations (just to see if any would work) without success. The application has INTERNET and USER_CREDENTIALS permissions. (I even tried enabling all the permissions, just in case..)

After a few days of research, I tried using the java API to see if I could retrieve the user certificate(s) that way. Long story short, I was able to retrieve the currently installed CA certificates (which I don't care about ) using the KeyStore API and the user certificates (which I am interested in!) using the KeyChain API.
Example:
// Needs to be called at least once when the application is first executed. Will prompt the user to select a certificate
KeyChain.ChoosePrivateKeyAlias(this, this, null, null, null, -1, 'example');
var result = KeyChain.GetCertificateChain(Application.Context, 'example');
var firstCertificate = result[0]; // just for test

Android Certificate Download For User Guide

While this approach seems to 'work', I am being faced with another problem. I need .NET X509Certificates (System.Security.Cryptography.X509Certificates.X509Certificate), not Java.Security.Cert.X509Certificate. I do not suppose that is a way of 'converting' the java certificate representation to .NET..

Any suggestions? I would really love to be able to use the .NET API, but, at this point, I am open to anything .

I am attaching one of my test projects together with the sample certificate (the password for the example.pfx file is 'password' - no quotes). Download movies and tv shows app for android free.

Thank you,
Cristian

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PS:
I know that I could simply create a X509Certificate2 by passing in the path to the .pfx file, but I do not want to do it that way. I want to read the certificate from the device's store.

Android Certificate Download For User Free

var certificate = new X509Certificate2('/storage/emulated/0/Download/example.com.pfx', 'password');