Passport strategy for authenticating with an ethereum address and signature.
This module lets you authenticate using an ethereum address and signature in your Node.js applications. By plugging into Passport, ethereum authentication can be easily and unobtrusively integrated into any application or framework that supports Connect-style middleware, including Express.
$ npm install passport-ethereum
The ethereum authentication strategy authenticates users using a address and
signature. The strategy requires a verify callback, which accepts these
credentials and calls done providing a user.
passport.use(new EthereumStrategy(
function(address, signature, done) {
web3.personal.sign(
web3.fromUtf8(`Sign in use ${address} with some nonce string`),
web3.eth.coinbase,
(error, data) => {
if (error) {
return done(error);
} else {
if (data == signature) {
User.findOneOrCreate({ address: address }, function (err, user) {
if (err) {
return done(err);
} else {
return done(null, user);
}
});
}
}
}
);
}
));
Use passport.authenticate(), specifying the 'ethereum' strategy, to
authenticate requests.
For example, as route middleware in an Express application:
app.post('/signature',
passport.authenticate('ethereum', { failureRedirect: '/signature' }),
function(req, res) {
res.redirect('/');
});
For complete, working examples, refer to the multiple examples included.
$ npm install
$ npm test
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