Curl Command example with client Key to https Server

To communicate with https Server by curl command, if a client private key is required, it is not simple like as i thought. my_client.12 is my client key and I need to convert to the other format. Before starting, check your key.

openssl pkcs12 -info -in my_client.12

Check the Server sertificate

openssl s_client -showcerts -connect www.domain.com:443

If you see that all right. you will be able to communicate with the https server which requires client key.

Convert the client key

openssl pkcs12 -in my_client.12 -out client.pem -clcerts -nokeys
openssl pkcs12 -in my_client.12 -out key.pem -nocerts
openssl rsa -in key.pem -out newkey.pem

And now finally, you can communicate with the server.

curl -v -G  -k --key newkey.pem --cert ./client.pem:password https://www.domain.com/path