How do I get the client certificate from a website?

How to install a client certificate?

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In this tutorial we will be explaining with the following options: Use `openssl`;. Use PyOpenSSL;. Use the new `sclient()` method. > NOTE: If you already have a client certificate but it is expired, you can import it from the file. Otherwise, make sure that the server does not require client certificates for authentication.

### Configure. To use the client certificate with `openssl`, the server must be configured to require the client certificate in addition to a normal SSL certificate. #### Install the CA certificates. Download all CA certificates and store them locally. `openssl ca -gencert. config /etc/cacerts. in "localhost.crt" -out "localhost.pem" -name localhost.pem` -out "example.com.crt"
name example.crt` -in "example.crt" -out "example.csr" -name example.csr` #### Create the self-signed certificate. `openssl req. new -x509 -days 365 -nodes -out example.csr -key "localhost.pem" -subj "/C=US/ST=Colorado/L=Denver/O=Example Inc."` ### Prepare the client certificate. The client's file contains the client name and optionally the public key and is named `localhost.pem`. This file should be stored locally because it cannot be transferred over the network.

How do I export client authentication certificate?

I'm using IdentityServer4 as Identity provider for an application.

It has 2 roles, Admin and User. Client application sends requests to the server over TLS (using Bearer Token).

So I've added client ID and client secret to IdentityServer, configured it in my Angular app, and everything works well. But I'm struggling with exporting the TLS certificate. How can I do that?
Right now what I do is, I generate a PKCS12 and import it to the Keystore (from Android Studio). But how can I export it? Finally I ended up using keytool. You should have a Keystore folder created for that. Go to the folder and type the following commands in sequence :
Keytool : C:keytool> keytool -importcert -alias MyClient -file C:pathtocert.pem -keystore Keystore. Keytool export : C:keytool> keytool -exportcert -alias -file C:pathtocert.pem -keystore Keystore Where key-alias is my client Id, and keystore is the location of the keystore.