@deftypefun {int} {gnutls_privkey_generate} (gnutls_privkey_t @var{pkey}, gnutls_pk_algorithm_t @var{algo}, unsigned int @var{bits}, unsigned int @var{flags}) @var{pkey}: An initialized private key @var{algo}: is one of the algorithms in @code{gnutls_pk_algorithm_t} . @var{bits}: the size of the parameters to generate @var{flags}: Must be zero or flags from @code{gnutls_privkey_flags_t} . This function will generate a random private key. Note that this function must be called on an initialized private key. The flag @code{GNUTLS_PRIVKEY_FLAG_PROVABLE} instructs the key generation process to use algorithms like Shawe-Taylor (from FIPS PUB186-4) which generate provable parameters out of a seed for RSA and DSA keys. See @code{gnutls_privkey_generate2()} for more information. Note that when generating an elliptic curve key, the curve can be substituted in the place of the bits parameter using the @code{GNUTLS_CURVE_TO_BITS()} macro. The input to the macro is any curve from @code{gnutls_ecc_curve_t} . For DSA keys, if the subgroup size needs to be specified check the @code{GNUTLS_SUBGROUP_TO_BITS()} macro. It is recommended to do not set the number of @code{bits} directly, use @code{gnutls_sec_param_to_pk_bits()} instead . See also @code{gnutls_privkey_generate2()} . @strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned, otherwise a negative error value. @strong{Since:} 3.3.0 @end deftypefun