title: Generate EC KeyPair from OpenSSL command line
body: <p>I would like to be able to generate a key pair private and public key in command line with openssl, but I don't know exactly how to do it. What I have done so far was to do the following command line but this only prints me this which I don't know exactly what it is:s</p>
  
  <p>FROM OPENSSL PAGE: To create EC parameters with explicit parameters:</p>
  
  <pre><code>openssl ecparam -out ec_param.pem -name prime192v1 -param_enc explicit
  
  -----BEGIN EC PARAMETERS-----
  MIHHAgEBMCQGByqGSM49AQECGQD////////////////////+//////////8wSwQY
  /////////////////////v/////////8BBhkIQUZ5ZyA5w+n6atyJDBJ/rje7MFG
  ubEDFQAwRa5vyEIvZO1XlSjTgSDq4SGW1QQxBBiNqA6wMJD2fL8g60OhiAD0/wr9
  gv8QEgcZK5X/yNp4YxAR7WskzdVz+XehHnlIEQIZAP///////////////5ne+DYU
  a8mxtNIoMQIBAQ==
  -----END EC PARAMETERS-----
  </code></pre>
  
  <p>can some one tell me how to get something like this:</p>
  
  <pre><code>//-----------------Generated Key Pair----------------------------------//
  char privkey[]=
      "-----BEGIN EC PARAMETERS-----\n"
      "BgUrgQQACQ==\n"
      "-----END EC PARAMETERS-----\n"
      "-----BEGIN EC PRIVATE KEY-----\n"
      "MFACAQEEFI9sfpfTk0YlZx8JaCZnLsy4T6HYoAcGBSuBBAAJoSwDKgAEIlzYflxD\n"
      "0396M0i6dGfSY3khTU7kiNyEv/B1EoyGmqvH7tjhSmpP1A==\n"
      "-----END EC PRIVATE KEY-----\n";
  char pubkey[] =
      "-----BEGIN PUBLIC KEY-----\n"
      "MD4wEAYHKoZIzj0CAQYFK4EEAAkDKgAEIlzYflxD0396M0i6dGfSY3khTU7kiNyE\n"
      "v/B1EoyGmqvH7tjhSmpP1A==\n"
      "-----END PUBLIC KEY-----\n";
  //---------------------------------------------------------------------//
  </code></pre>
  
  <p>I got this from a code I got online which uses this key pair to sign messages with ECDSA, but now I would like to be able to generate my own key pair(from openssl command line) and use it in the code like this, to change this key pair for mine.</p>
  
  <p>In my case I would like to use NIST P225 which is "prime256v1".</p>
  
  <p>Can someone help me?</p>
  
  <p>Thanks, Best Regards</p>