@deftypefun {int} {gnutls_pkcs7_get_crt_raw} (gnutls_pkcs7_t @var{pkcs7}, unsigned @var{indx}, void * @var{certificate}, size_t * @var{certificate_size})
@var{pkcs7}: should contain a gnutls_pkcs7_t type

@var{indx}: contains the index of the certificate to extract

@var{certificate}: the contents of the certificate will be copied
there (may be null)

@var{certificate_size}: should hold the size of the certificate

This function will return a certificate of the PKCS7 or RFC2630
certificate set.

After the last certificate has been read
@code{GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE}  will be returned.

@strong{Returns:} On success, @code{GNUTLS_E_SUCCESS}  (0) is returned, otherwise a
negative error value.  If the provided buffer is not long enough,
then  @code{certificate_size} is updated and
@code{GNUTLS_E_SHORT_MEMORY_BUFFER}  is returned.
@end deftypefun