@deftypefun {int} {gnutls_x509_privkey_import2} (gnutls_x509_privkey_t @var{key}, const gnutls_datum_t * @var{data}, gnutls_x509_crt_fmt_t @var{format}, const char * @var{password}, unsigned int @var{flags})
@var{key}: The data to store the parsed key

@var{data}: The DER or PEM encoded key.

@var{format}: One of DER or PEM

@var{password}: A password (optional)

@var{flags}: an ORed sequence of gnutls_pkcs_encrypt_flags_t

This function will import the given DER or PEM encoded key, to 
the native @code{gnutls_x509_privkey_t}  format, irrespective of the
input format. The input format is auto-detected.

The supported formats are basic unencrypted key, PKCS8, PKCS12,
and the openssl format.

If the provided key is encrypted but no password was given, then
@code{GNUTLS_E_DECRYPTION_FAILED}  is returned. Since GnuTLS 3.4.0 this
function will utilize the PIN callbacks if any.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a
negative error value.
@end deftypefun