typepki-asn1parse

typepki-asn1parse: ASN.1 parser utility for TypePKI library

TOP | github | npm | TypePKI

The 'TypePKI' library is an opensource free TypeScript PKI library which is the successor of the long lived jsrsasign library.

The 'typepki-asn1parse' is a ASN.1 parser utility for TypePKI library.

FEATURE

• ASN.1 DER parser for ASN.1 hexadecimal string (BER will also be in the future.)
• Dual CommonJS/ES module package supporting CommonJS(CJS) and ES modules

Usage

import { asn1parse } from "typepki-asn1parse";
console.log(asn1parse("300602010a02010b"));

This shows

{
  "t": "seq",
  "v": [
    { "t": "int", "v": "0a" },
    { "t": "int", "v": "0b" },
  ]
}

Parser output

Result will be a Record object which has following members:

• t - short ASN.1 tag name
• v - ASN.1 value

short ASN.1 tag name

short name	ASN.1 name	code	value	value sample
bool	INTEGER	01
int	INTEGER	02
bitstr	BitString	03
octstr	OctetString	04
null	NULL	05
oid	ObjectIdentifier	06		{oid: "0.2.3.15"}
enum	Enumerated	0a
utf8str	UTF8String	0c		{str: "りんご3"}
prnstr	PrintableString	13		{str: "test12"}
ia5str	IA5String	16		{str: "[e-mail]"}
utctime	UTCTime	17		131231235959Z
gentime	GeneralizedTime	18		20131231235959Z
seq	SEQUENCE	30	array of Record	[{t:"int",v:"0123"}]
set	SET	31	array of Record	[{t:"int",v:"0123"}]

Encapsulated

When the ASN.1 value is a ASN.1 TLV or a sequence of ASN.1 TLV, the V will also be parsed.

This will be applied to ASN.1 application tag TLV such as "[0]" or "[1]".