mirror of
https://github.com/Luzifer/repo-template.git
synced 2024-11-15 02:42:42 +00:00
47 lines
1.6 KiB
Go
47 lines
1.6 KiB
Go
|
// Copyright 2017 The Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
// Package asn1 contains supporting types for parsing and building ASN.1
|
||
|
|
// messages with the cryptobyte package.
|
||
|
|
package asn1 // import "golang.org/x/crypto/cryptobyte/asn1"
|
||
|
|
|
||
|
|
// 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
|
||
|
|
|
||
|
|
const (
|
||
|
|
classConstructed = 0x20
|
||
|
|
classContextSpecific = 0x80
|
||
|
|
)
|
||
|
|
|
||
|
|
// Constructed returns t with the constructed class bit set.
|
||
|
|
func (t Tag) Constructed() Tag { return t | classConstructed }
|
||
|
|
|
||
|
|
// ContextSpecific returns t with the context-specific class bit set.
|
||
|
|
func (t Tag) ContextSpecific() Tag { return t | classContextSpecific }
|
||
|
|
|
||
|
|
// 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)
|
||
|
|
)
|