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@peculiar/asn1-x509

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@peculiar/asn1-x509

ASN.1 schema of `Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile` (RFC5280)

  • 2.3.15
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  • npm
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229K
increased by3.18%
Maintainers
6
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What is @peculiar/asn1-x509?

@peculiar/asn1-x509 is an npm package that provides tools for working with ASN.1 (Abstract Syntax Notation One) and X.509 certificates. It allows developers to parse, encode, and manipulate X.509 certificates and related structures in JavaScript.

What are @peculiar/asn1-x509's main functionalities?

Parsing X.509 Certificates

This feature allows you to parse a raw X.509 certificate from a binary format (BER). The code sample demonstrates how to convert a base64-encoded certificate into a Certificate object.

const { Certificate } = require('@peculiar/asn1-x509');
const rawCert = Buffer.from('MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1J...', 'base64');
const cert = Certificate.fromBER(rawCert);
console.log(cert);

Encoding X.509 Certificates

This feature allows you to encode an X.509 certificate into a binary format (BER). The code sample demonstrates how to create a Certificate object and convert it into a base64-encoded string.

const { Certificate } = require('@peculiar/asn1-x509');
const cert = new Certificate({
  tbsCertificate: {
    version: 2,
    serialNumber: new Uint8Array([1, 2, 3, 4]),
    signature: { algorithm: '1.2.840.113549.1.1.11' },
    issuer: { type: 'rdnSequence', value: [] },
    validity: { notBefore: new Date(), notAfter: new Date() },
    subject: { type: 'rdnSequence', value: [] },
    subjectPublicKeyInfo: { algorithm: { algorithm: '1.2.840.113549.1.1.1' }, subjectPublicKey: new Uint8Array([1, 2, 3, 4]) }
  },
  signatureAlgorithm: { algorithm: '1.2.840.113549.1.1.11' },
  signatureValue: new Uint8Array([1, 2, 3, 4])
});
const rawCert = cert.toSchema().toBER(false);
console.log(Buffer.from(rawCert).toString('base64'));

Manipulating Certificate Extensions

This feature allows you to manipulate extensions within an X.509 certificate. The code sample demonstrates how to add a new extension to a Certificate object.

const { Certificate, Extension } = require('@peculiar/asn1-x509');
const cert = new Certificate();
const ext = new Extension({
  extnID: '2.5.29.14',
  critical: false,
  extnValue: new Uint8Array([1, 2, 3, 4])
});
cert.tbsCertificate.extensions = [ext];
console.log(cert.tbsCertificate.extensions);

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Package last updated on 23 Dec 2024

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