authentication using node.js and mongodb - node.js

Question

Guys I am trying to get myself authenticated and for this I am using node.js and mongo DB.But the thing is that after registarion the user is not able to authenticate himself.Here is my snippet
app.post('/login',function(req,res){
ContactProvider.findAll(function(error, posts) {
var aut = req.body;
if (aut.user == posts.user && aut.pass == posts.pass) {
req.session.name = {name:aut.user};
res.redirect('/home');
} else {
res.send('Bad user/pass');
}
});
});
Below is my snippet for registering the user
app.post('/register',function(req, res) {
var post=req.body;
if(post.pass!=post.cpass) {
res.send("Error:Password doesnt match");
} else {
ContactProvider.save({
user: req.param('user'),
pass: req.param('pass'),
cpass: req.param('cpass'),
email: req.param('email')
}, function(error, docs) {
res.redirect('/');
});
}
});
The ContactProvider is the one below where post provider is a different file where all the mongoose things happen
var ContactProvider = require('./PostProvider').ContactProvider;
var ContactProvider= new ContactProvider();
This is the finone query in the postprovider file
ContactProvider.prototype.findone = function(name,pass, callback) {
Post.findOne({name:name},{pass:pass}, function (err, post) {
callback(null, post);
});
};

Answer 1

Something's seriously wrong with your code ( why you use name posts for an array of ContactProvider? ). You have to search for ContactProvider based on username and password. Something like this:
app.post('/login',function(req,res){
var aut = req.body;
ContactProvider.findOne(
{
user: aut.user,
pass: aut.pass
},
function(err, usr) {
if (error || !usr) {
res.send('Bad user/pass');
} else {
// we have a user, authenticate!
req.session.name = {name:aut.user};
res.redirect('/home');
}
}
);
});
SIDE NOTE: This is a very simple way of authenticating users, but it is not secure at all. You should read more about authentication and security in the internet. Very useful knowledge indeed.
EDIT: There's also an issue with your registration. Your data is stored in post variable, so use it on ContactProvider as well:
// some other code
ContactProvider.save({
user: post.user,
pass: post.pass,
cpass: post.cpass, // no need to store the same thing twice
email: post.email