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node-red/red/api/auth/strategies.js

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/**
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* Copyright 2015 IBM Corp.
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*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var BearerStrategy = require('passport-http-bearer').Strategy;
var ClientPasswordStrategy = require('passport-oauth2-client-password').Strategy;
var passport = require("passport");
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var crypto = require("crypto");
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var util = require("util");
var Tokens = require("./tokens");
var Users = require("./users");
var Clients = require("./clients");
var permissions = require("./permissions");
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var log;
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var bearerStrategy = function (accessToken, done) {
// is this a valid token?
Tokens.get(accessToken).then(function(token) {
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if (token) {
Users.get(token.user).then(function(user) {
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if (user) {
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done(null,user,{scope:token.scope});
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} else {
log.audit({event: "auth.invalid-token"});
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done(null,false);
}
});
} else {
log.audit({event: "auth.invalid-token"});
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done(null,false);
}
});
}
bearerStrategy.BearerStrategy = new BearerStrategy(bearerStrategy);
var clientPasswordStrategy = function(clientId, clientSecret, done) {
Clients.get(clientId).then(function(client) {
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if (client && client.secret == clientSecret) {
done(null,client);
} else {
log.audit({event: "auth.invalid-client",client:clientId});
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done(null,false);
}
});
}
clientPasswordStrategy.ClientPasswordStrategy = new ClientPasswordStrategy(clientPasswordStrategy);
var loginAttempts = [];
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var loginSignInWindow = 600000; // 10 minutes
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var passwordTokenExchange = function(client, username, password, scope, done) {
var now = Date.now();
loginAttempts = loginAttempts.filter(function(logEntry) {
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return logEntry.time + loginSignInWindow > now;
});
loginAttempts.push({time:now, user:username});
var attemptCount = 0;
loginAttempts.forEach(function(logEntry) {
/* istanbul ignore else */
if (logEntry.user == username) {
attemptCount++;
}
});
if (attemptCount > 5) {
log.audit({event: "auth.login.fail.too-many-attempts",username:username,client:client.id});
done(new Error("Too many login attempts. Wait 10 minutes and try again"),false);
return;
}
Users.authenticate(username,password).then(function(user) {
if (user) {
if (scope === "") {
scope = user.permissions;
}
if (permissions.hasPermission(user.permissions,scope)) {
loginAttempts = loginAttempts.filter(function(logEntry) {
return logEntry.user !== username;
});
Tokens.create(username,client.id,scope).then(function(tokens) {
log.audit({event: "auth.login",username:username,client:client.id,scope:scope});
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done(null,tokens.accessToken,null,{expires_in:tokens.expires_in});
});
} else {
log.audit({event: "auth.login.fail.permissions",username:username,client:client.id,scope:scope});
done(null,false);
}
} else {
log.audit({event: "auth.login.fail.credentials",username:username,client:client.id,scope:scope});
done(null,false);
}
});
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}
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function AnonymousStrategy() {
passport.Strategy.call(this);
this.name = 'anon';
}
util.inherits(AnonymousStrategy, passport.Strategy);
AnonymousStrategy.prototype.authenticate = function(req) {
var self = this;
Users.default().then(function(anon) {
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if (anon) {
self.success(anon,{scope:anon.permissions});
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} else {
self.fail(401);
}
});
}
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module.exports = {
init: function(runtime) {
log = runtime.log;
},
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bearerStrategy: bearerStrategy,
clientPasswordStrategy: clientPasswordStrategy,
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passwordTokenExchange: passwordTokenExchange,
anonymousStrategy: new AnonymousStrategy()
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}