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: "[email protected]"}| |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]".