sTLS

TLS packet decoder / encoder.

This module provides methods to decode TLS packets to javascript objects and vice versa.

Features

Supported packets:

• client_hello
• server_hello
• client_key_exchange
• server_key_exchange
• certificate
• server_hello_done

API

var stls = require('stls');

// client_hello
var buf = new Buffer('16030200310100002d030254cd22e09fe9c4556bb4a6246a8641ad23c8a4c69a7c41da9d78e462a2a352900000040033c01101000000', 'hex');
// set the start position by
buf.cursor = 0;
// or pass the {offset: 0} as option to the read method

var jsObject = stls.read(buf);

console.log(jsObject);

/*
{ ContentType: 'handshake',
  ProtocolVersion: '1.1',
  Length: 49,
  handshake: 
   { HandshakeType: 'client_hello',
     Length: 45,
     ProtocolVersion: '1.1',
     Time: 1422729952,
     Random: <Buffer 9f e9 c4 55 6b b4 a6 24 6a 86 41 ad 23 c8 a4 c6 9a 7c 41 da 9d 78 e4 62 a2 a3 52 90>,
     SessionIDLength: 0,
     CipherSuitesLength: 4,
     CipherSuites: 
      [ 'TLS_DHE_RSA_WITH_AES_128_CBC_SHA',
        'TLS_ECDHE_RSA_WITH_RC4_128_SHA' ],
     CompressionMethodsLength: 1,
     CompressionMethods: [ 'null' ],
     ExtensionsLength: 0,
     Extensions: [] } }
*/

var encodedSize = stls.size(jsObject);

var buf2 = new Buffer(encodedSize);

stls.write(buf2, jsObject, {offset: 0}); // or set buf2.cursor

// now buf2 === buf

See example.js and test/ for further examples.

LICENSE

The MIT License (MIT)

Copyright (c) 2015 Martin Wind

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.