@subheading asn1_get_tag_der
@anchor{asn1_get_tag_der}
@deftypefun {int} {asn1_get_tag_der} (const unsigned char * @var{der}, int @var{der_len}, unsigned char * @var{cls}, int * @var{len}, unsigned long * @var{tag})
@var{der}: DER data to decode.

@var{der_len}: Length of DER data to decode.

@var{cls}: Output variable containing decoded class.

@var{len}: Output variable containing the length of the DER TAG data.

@var{tag}: Output variable containing the decoded tag (may be @code{NULL} ).

Decode the class and TAG from DER code.

@strong{Returns:} Returns @code{ASN1_SUCCESS}  on success, or an error.
@end deftypefun

