1 node-asn1 is a library for encoding and decoding ASN.1 datatypes in pure JS.
2 Currently BER encoding is supported; at some point I'll likely have to do DER.
6 Mostly, if you're *actually* needing to read and write ASN.1, you probably don't
7 need this readme to explain what and why. If you have no idea what ASN.1 is,
8 see this: ftp://ftp.rsa.com/pub/pkcs/ascii/layman.asc
10 The source is pretty much self-explanatory, and has read/write methods for the
11 common types out there.
15 The following reads an ASN.1 sequence with a boolean.
17 var Ber = require('asn1').Ber;
19 var reader = new Ber.Reader(new Buffer([0x30, 0x03, 0x01, 0x01, 0xff]));
21 reader.readSequence();
22 console.log('Sequence len: ' + reader.length);
23 if (reader.peek() === Ber.Boolean)
24 console.log(reader.readBoolean());
28 The following generates the same payload as above.
30 var Ber = require('asn1').Ber;
32 var writer = new Ber.Writer();
34 writer.startSequence();
35 writer.writeBoolean(true);
38 console.log(writer.buffer);
50 See <https://github.com/mcavage/node-asn1/issues>.