



@deftypefun {int} {gnutls_x509_crt_get_subject_unique_id} (gnutls_x509_crt_t @var{crt}, char * @var{buf}, size_t * @var{buf_size})
@var{crt}: Holds the certificate

@var{buf}: user allocated memory buffer, will hold the unique id

@var{buf_size}: size of user allocated memory buffer (on input), will hold
actual size of the unique ID on return.

This function will extract the subjectUniqueID value (if present) for
the given certificate.

If the user allocated memory buffer is not large enough to hold the
full subjectUniqueID, then a GNUTLS_E_SHORT_MEMORY_BUFFER error will be
returned, and buf_size will be set to the actual length.

@strong{Returns:} @code{GNUTLS_E_SUCCESS}  on success, otherwise a negative error code.
@end deftypefun
