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@deftypefun {int} {gnutls_x509_crt_sign2} (gnutls_x509_crt_t @var{crt}, gnutls_x509_crt_t @var{issuer}, gnutls_x509_privkey_t @var{issuer_key}, gnutls_digest_algorithm_t @var{dig}, unsigned int @var{flags})
@var{crt}: a certificate of type @code{gnutls_x509_crt_t}
@var{issuer}: is the certificate of the certificate issuer
@var{issuer_key}: holds the issuer's private key
@var{dig}: The message digest to use, @code{GNUTLS_DIG_SHA256} is a safe choice
@var{flags}: must be 0
This function will sign the certificate with the issuer's private key, and
will copy the issuer's information into the certificate.
This must be the last step in a certificate generation since all
the previously set parameters are now signed.
A known limitation of this function is, that a newly-signed certificate will not
be fully functional (e.g., for signature verification), until it
is exported an re-imported.
After GnuTLS 3.6.1 the value of @code{dig} may be @code{GNUTLS_DIG_UNKNOWN} ,
and in that case, a suitable but reasonable for the key algorithm will be selected.
@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS} (0) is returned, otherwise a
negative error value.
@end deftypefun
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