enigma-bbs/core/user.js

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/* jslint node: true */
'use strict';
const userDb = require('./database.js').dbs.user;
const Config = require('./config.js').config;
const userGroup = require('./user_group.js');
const Errors = require('./enig_error.js').Errors;
// deps
const crypto = require('crypto');
const assert = require('assert');
const async = require('async');
const _ = require('lodash');
const moment = require('moment');
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exports.isRootUserId = function(id) { return 1 === id; };
module.exports = class User {
constructor() {
this.userId = 0;
this.username = '';
this.properties = {}; // name:value
this.groups = []; // group membership(s)
}
// static property accessors
static get RootUserID() {
return 1;
}
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static get PBKDF2() {
return {
iterations : 1000,
keyLen : 128,
saltLen : 32,
};
}
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static get StandardPropertyGroups() {
return {
password : [ 'pw_pbkdf2_salt', 'pw_pbkdf2_dk' ],
};
}
static get AccountStatus() {
return {
disabled : 0,
inactive : 1,
active : 2,
};
}
isAuthenticated() {
return true === this.authenticated;
}
isValid() {
if(this.userId <= 0 || this.username.length < Config.users.usernameMin) {
return false;
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}
return this.hasValidPassword();
}
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hasValidPassword() {
if(!this.properties || !this.properties.pw_pbkdf2_salt || !this.properties.pw_pbkdf2_dk) {
return false;
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}
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return this.properties.pw_pbkdf2_salt.length === User.PBKDF2.saltLen * 2 && this.prop_name.pw_pbkdf2_dk.length === User.PBKDF2.keyLen * 2;
}
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isRoot() {
return User.isRootUserId(this.userId);
}
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isSysOp() { // alias to isRoot()
return this.isRoot();
}
isGroupMember(groupNames) {
if(_.isString(groupNames)) {
groupNames = [ groupNames ];
}
const isMember = groupNames.some(gn => (-1 !== this.groups.indexOf(gn)));
return isMember;
}
getLegacySecurityLevel() {
if(this.isRoot() || this.isGroupMember('sysops')) {
return 100;
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}
if(this.isGroupMember('users')) {
return 30;
}
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return 10; // :TODO: Is this what we want?
}
authenticate(username, password, cb) {
const self = this;
const cachedInfo = {};
async.waterfall(
[
function fetchUserId(callback) {
// get user ID
User.getUserIdAndName(username, (err, uid, un) => {
cachedInfo.userId = uid;
cachedInfo.username = un;
return callback(err);
});
},
function getRequiredAuthProperties(callback) {
// fetch properties required for authentication
User.loadProperties(cachedInfo.userId, { names : User.StandardPropertyGroups.password }, (err, props) => {
return callback(err, props);
});
},
function getDkWithSalt(props, callback) {
// get DK from stored salt and password provided
User.generatePasswordDerivedKey(password, props.pw_pbkdf2_salt, (err, dk) => {
return callback(err, dk, props.pw_pbkdf2_dk);
});
},
function validateAuth(passDk, propsDk, callback) {
//
// Use constant time comparison here for security feel-goods
//
const passDkBuf = new Buffer(passDk, 'hex');
const propsDkBuf = new Buffer(propsDk, 'hex');
if(passDkBuf.length !== propsDkBuf.length) {
return callback(Errors.AccessDenied('Invalid password'));
}
let c = 0;
for(let i = 0; i < passDkBuf.length; i++) {
c |= passDkBuf[i] ^ propsDkBuf[i];
}
return callback(0 === c ? null : Errors.AccessDenied('Invalid password'));
},
function initProps(callback) {
User.loadProperties(cachedInfo.userId, (err, allProps) => {
if(!err) {
cachedInfo.properties = allProps;
}
return callback(err);
});
},
function initGroups(callback) {
userGroup.getGroupsForUser(cachedInfo.userId, (err, groups) => {
if(!err) {
cachedInfo.groups = groups;
}
return callback(err);
});
}
],
err => {
if(!err) {
self.userId = cachedInfo.userId;
self.username = cachedInfo.username;
self.properties = cachedInfo.properties;
self.groups = cachedInfo.groups;
self.authenticated = true;
}
return cb(err);
}
);
}
create(password, cb) {
assert(0 === this.userId);
if(this.username.length < Config.users.usernameMin || this.username.length > Config.users.usernameMax) {
return cb(Errors.Invalid('Invalid username length'));
}
const self = this;
// :TODO: set various defaults, e.g. default activation status, etc.
self.properties.account_status = Config.users.requireActivation ? User.AccountStatus.inactive : User.AccountStatus.active;
async.series(
[
function beginTransaction(callback) {
userDb.run('BEGIN;', err => {
return callback(err);
});
},
function createUserRec(callback) {
userDb.run(
`INSERT INTO user (user_name)
VALUES (?);`,
[ self.username ],
function inserted(err) { // use classic function for |this|
if(err) {
return callback(err);
}
self.userId = this.lastID;
// Do not require activation for userId 1 (root/admin)
if(User.RootUserID === self.userId) {
self.properties.account_status = User.AccountStatus.active;
}
return callback(null);
}
);
},
function genAuthCredentials(callback) {
User.generatePasswordDerivedKeyAndSalt(password, (err, info) => {
if(err) {
return callback(err);
}
self.properties.pw_pbkdf2_salt = info.salt;
self.properties.pw_pbkdf2_dk = info.dk;
return callback(null);
});
},
function setInitialGroupMembership(callback) {
self.groups = Config.users.defaultGroups;
if(User.RootUserID === self.userId) { // root/SysOp?
self.groups.push('sysops');
}
return callback(null);
},
function saveAll(callback) {
self.persist(false, err => {
return callback(err);
});
}
],
err => {
if(err) {
const originalError = err;
userDb.run('ROLLBACK;', err => {
assert(!err);
return cb(originalError);
});
} else {
userDb.run('COMMIT;', err => {
return cb(err);
});
}
}
);
}
persist(useTransaction, cb) {
assert(this.userId > 0);
const self = this;
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async.series(
[
function beginTransaction(callback) {
if(useTransaction) {
userDb.run('BEGIN;', err => {
return callback(err);
});
} else {
return callback(null);
}
},
function saveProps(callback) {
self.persistProperties(self.properties, err => {
return callback(err);
});
},
function saveGroups(callback) {
userGroup.addUserToGroups(self.userId, self.groups, err => {
return callback(err);
});
}
],
err => {
if(err) {
if(useTransaction) {
userDb.run('ROLLBACK;', err => {
return cb(err);
});
} else {
return cb(err);
}
} else {
if(useTransaction) {
userDb.run('COMMIT;', err => {
return cb(err);
});
} else {
return cb(null);
}
}
}
);
}
persistProperty(propName, propValue, cb) {
// update live props
this.properties[propName] = propValue;
userDb.run(
`REPLACE INTO user_property (user_id, prop_name, prop_value)
VALUES (?, ?, ?);`,
[ this.userId, propName, propValue ],
err => {
if(cb) {
return cb(err);
}
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}
);
}
removeProperty(propName, cb) {
// update live
delete this.properties[propName];
userDb.run(
`DELETE FROM user_property
WHERE user_id = ? AND prop_name = ?;`,
[ this.userId, propName ],
err => {
if(cb) {
return cb(err);
}
}
);
}
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persistProperties(properties, cb) {
const self = this;
// update live props
_.merge(this.properties, properties);
const stmt = userDb.prepare(
`REPLACE INTO user_property (user_id, prop_name, prop_value)
VALUES (?, ?, ?);`
);
async.each(Object.keys(properties), (propName, nextProp) => {
stmt.run(self.userId, propName, properties[propName], err => {
return nextProp(err);
});
},
err => {
if(err) {
return cb(err);
}
stmt.finalize( () => {
return cb(null);
});
});
}
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setNewAuthCredentials(password, cb) {
User.generatePasswordDerivedKeyAndSalt(password, (err, info) => {
if(err) {
return cb(err);
}
const newProperties = {
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pw_pbkdf2_salt : info.salt,
pw_pbkdf2_dk : info.dk,
};
this.persistProperties(newProperties, err => {
return cb(err);
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});
});
}
getAge() {
if(_.has(this.properties, 'birthdate')) {
return moment().diff(this.properties.birthdate, 'years');
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}
}
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static getUser(userId, cb) {
async.waterfall(
[
function fetchUserId(callback) {
User.getUserName(userId, (err, userName) => {
return callback(null, userName);
});
},
function initProps(userName, callback) {
User.loadProperties(userId, (err, properties) => {
return callback(err, userName, properties);
});
},
function initGroups(userName, properties, callback) {
userGroup.getGroupsForUser(userId, (err, groups) => {
return callback(null, userName, properties, groups);
});
}
],
(err, userName, properties, groups) => {
const user = new User();
user.userId = userId;
user.username = userName;
user.properties = properties;
user.groups = groups;
user.authenticated = false; // this is NOT an authenticated user!
return cb(err, user);
}
);
}
static isRootUserId(userId) {
return (User.RootUserID === userId);
}
static getUserIdAndName(username, cb) {
userDb.get(
`SELECT id, user_name
FROM user
WHERE user_name LIKE ?;`,
[ username ],
(err, row) => {
if(err) {
return cb(err);
}
if(row) {
return cb(null, row.id, row.user_name);
}
return cb(Errors.DoesNotExist('No matching username'));
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}
);
}
static getUserName(userId, cb) {
userDb.get(
`SELECT user_name
FROM user
WHERE id = ?;`,
[ userId ],
(err, row) => {
if(err) {
return cb(err);
}
if(row) {
return cb(null, row.user_name);
}
return cb(Errors.DoesNotExist('No matching user ID'));
}
);
}
static loadProperties(userId, options, cb) {
if(!cb && _.isFunction(options)) {
cb = options;
options = {};
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}
let sql =
`SELECT prop_name, prop_value
FROM user_property
WHERE user_id = ?`;
if(options.names) {
sql += ` AND prop_name IN("${options.names.join('","')}");`;
} else {
sql += ';';
}
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let properties = {};
userDb.each(sql, [ userId ], (err, row) => {
if(err) {
return cb(err);
}
properties[row.prop_name] = row.prop_value;
}, () => {
return cb(null, properties);
});
}
// :TODO: make this much more flexible - propValue should allow for case-insensitive compare, etc.
static getUserIdsWithProperty(propName, propValue, cb) {
let userIds = [];
userDb.each(
`SELECT user_id
FROM user_property
WHERE prop_name = ? AND prop_value = ?;`,
[ propName, propValue ],
(err, row) => {
if(row) {
userIds.push(row.user_id);
}
},
() => {
return cb(null, userIds);
}
);
}
static getUserList(options, cb) {
let userList = [];
let orderClause = 'ORDER BY ' + (options.order || 'user_name');
userDb.each(
`SELECT id, user_name
FROM user
${orderClause};`,
(err, row) => {
if(row) {
userList.push({
userId : row.id,
userName : row.user_name,
});
}
},
() => {
options.properties = options.properties || [];
async.map(userList, (user, nextUser) => {
userDb.each(
`SELECT prop_name, prop_value
FROM user_property
WHERE user_id = ? AND prop_name IN ("${options.properties.join('","')}");`,
[ user.userId ],
(err, row) => {
if(row) {
user[row.prop_name] = row.prop_value;
}
},
err => {
return nextUser(err, user);
}
);
},
(err, transformed) => {
return cb(err, transformed);
});
}
);
}
static generatePasswordDerivedKeyAndSalt(password, cb) {
async.waterfall(
[
function getSalt(callback) {
User.generatePasswordDerivedKeySalt( (err, salt) => {
return callback(err, salt);
});
},
function getDk(salt, callback) {
User.generatePasswordDerivedKey(password, salt, (err, dk) => {
return callback(err, salt, dk);
});
}
],
(err, salt, dk) => {
return cb(err, { salt : salt, dk : dk } );
}
);
}
static generatePasswordDerivedKeySalt(cb) {
crypto.randomBytes(User.PBKDF2.saltLen, (err, salt) => {
if(err) {
return cb(err);
}
return cb(null, salt.toString('hex'));
});
}
static generatePasswordDerivedKey(password, salt, cb) {
password = new Buffer(password).toString('hex');
crypto.pbkdf2(password, salt, User.PBKDF2.iterations, User.PBKDF2.keyLen, 'sha1', (err, dk) => {
if(err) {
return cb(err);
}
return cb(null, dk.toString('hex'));
});
}
};