The following is a list of standard tag and class combinations.
const (
BOOLEAN = Tag(1)
INTEGER = Tag(2)
BIT_STRING = Tag(3)
OCTET_STRING = Tag(4)
NULL = Tag(5)
OBJECT_IDENTIFIER = Tag(6)
ENUM = Tag(10)
UTF8String = Tag(12)
SEQUENCE = Tag(16 | classConstructed)
SET = Tag(17 | classConstructed)
PrintableString = Tag(19)
T61String = Tag(20)
IA5String = Tag(22)
UTCTime = Tag(23)
GeneralizedTime = Tag(24)
GeneralString = Tag(27)
)
Tag represents an ASN.1 identifier octet, consisting of a tag number (indicating a type) and class (such as context-specific or constructed).
Methods in the cryptobyte package only support the low-tag-number form, i.e. a single identifier octet with bits 7-8 encoding the class and bits 1-6 encoding the tag number.
type Tag uint8
func (t Tag) Constructed() Tag
Constructed returns t with the constructed class bit set.
func (t Tag) ContextSpecific() Tag
ContextSpecific returns t with the context-specific class bit set.