asn1_get_field_ptr
ASN1_VALUE ** asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
pchptr = asn1_get_field_ptr(&achoice, at);
pseqval = asn1_get_field_ptr(&aseq, seqat);
pseqval = asn1_get_field_ptr(&aseq, seqat);
pchval = asn1_get_field_ptr(pval, chtt);
pseqval = asn1_get_field_ptr(pval, seqtt);
pseqval = asn1_get_field_ptr(pval, seqtt);
pchval = asn1_get_field_ptr(pval, tt);
pseqval = asn1_get_field_ptr(pval, seqtt);
pseqval = asn1_get_field_ptr(pval, tt);
tmpfld = asn1_get_field_ptr(fld, tt);
tmpfld = asn1_get_field_ptr(fld, seqtt);