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- node-asn1 is a library for encoding and decoding ASN.1 datatypes in pure JS.
- Currently BER encoding is supported; at some point I'll likely have to do DER.
- ## Usage
- Mostly, if you're *actually* needing to read and write ASN.1, you probably don't
- need this readme to explain what and why. If you have no idea what ASN.1 is,
- see this: ftp://ftp.rsa.com/pub/pkcs/ascii/layman.asc
- The source is pretty much self-explanatory, and has read/write methods for the
- common types out there.
- ### Decoding
- The following reads an ASN.1 sequence with a boolean.
- var Ber = require('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('asn1').Ber;
- var writer = new Ber.Writer();
- writer.startSequence();
- writer.writeBoolean(true);
- writer.endSequence();
- console.log(writer.buffer);
- ## Installation
- npm install asn1
- ## License
- MIT.
- ## Bugs
- See <https://github.com/joyent/node-asn1/issues>.
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