@ldapjs/asn1

@ldapjs/asn1

@ldapjs/asn1 is a library for encoding and decoding ASN.1 datatypes in pure JS. Currently BER encoding is supported.

Decoding

The following reads an ASN.1 sequence with a boolean.

var Ber = require('@ldapjs/asn1').Ber;

var reader = new Ber.Reader(Buffer.from([0x30, 0x03, 0x01, 0x01, 0xff]));

reader.readSequence();
console.log('Sequence len: ' + reader.length);
if (reader.peek() === Ber.Boolean)
  console.log(reader.readBoolean());

Encoding

The following generates the same payload as above.

var Ber = require('@ldapjs/asn1').Ber;

var writer = new Ber.Writer();

writer.startSequence();
writer.writeBoolean(true);
writer.endSequence();

console.log(writer.buffer);

Installation

npm install asn1

Bugs

See https://github.com/ldapjs/asn1/issues.