Signature Store

Store digital signatures to prevent replay attacks

Install

Note : this middleware requires a leveldb compatible datastore

Note: this middleware expects the following properties on the request object:

• signature

$ npm install signature-store

API

var express             = require('express')
var signatureStore      = require('signature-store');
var options             = {db:<leveldb datastore>};
var app = express();
app.use(signatureStore(options));

signatureStore(options)

Returns the Signature Store middleware using the given options.

app.use(signatureStore({
  db            : <leveldb datastore>,
  expiration    : false,
  reject        : false,
  hash          : null,
}))

Options

db required - level db database expiration false - expiration (falsy values for no expiration) reject false - reject request if signature is not new (401 Unauthorized) hash null - function to hash signature

Examples

Server-Sent Events

var express = require('express');
var levelup = require('levelup');
var memdown = require('memdown');
var db = levelup('/does/not/matter',{db: memdown});
var app = express();
var signatureStore = require('signature-store');
var options = {
    db : db
}
app.use(...)
app.use(signatureStore(options));
app.use(function(req,res){
    console.log(req.newSignature);//Status of signature for current request
})
app.listen(8080);

See Also

• Signature Extraction Middleware
• Signature Verification Middleware

Credits

• John Henry

License

The MIT License (MIT)

Copyright (c) 2014 John Henry [e-mail]

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.