SSL_CTX_use_PrivateKey_file does not work with Elliptic Curve Private Key

[Darshan Mody]

Hi,

I am new to openssl APIs. However I am using the current code from SIPp. Below 
is the code snippet for the Private Key

 if ( SSL_CTX_use_PrivateKey_file(sip_trp_ssl_ctx_client,
                                       tls_key_name,
                                       SSL_FILETYPE_PEM ) != 1 ) {
    ERROR("FI_init_ssl_context: SSL_CTX_use_PrivateKey_file (client) failed");
    return SSL_INIT_ERROR;
  }

When I provide the Elliptic Private Key it always returns an Error.

-----BEGIN EC PARAMETERS-----

-----END EC PARAMETERS-----
-----BEGIN EC PRIVATE KEY-----

-----END EC PRIVATE KEY-----

My Private key looks as above

Thanks
Darshan