Access Control List Class

Simple implementation of ACL (Access Control Lists):

• Run the tests with: node test.js

API

Acl(filename):

• create an ACL object
• filename is json file where the permissions can be saved

Acl.grant(granter, object, verb, role):

• granter - the role performing the grant operation. This role must have 'grant' permissions (verb) to be able to perform grant.
• role now has permission to perform verb operations on object
• object is created with grant permission for granter if it does not exist
• returns true if successful and false otherwise

Acl.revoke(granter, object, verb, role):

• granter - the role performing the revoke operation. This role must have 'grant' permissions (verb) to be able to perform revoke.
• role does not has permission to perform verb operations on object anymore (it is not necessary that role has verb permissions to perform revoke)
• returns true if successful and false otherwise

Acl.init:

• read saved permissions from the file specified in the constructor

Acl.save:

• save the permissions to the file specified in the constructor

Example

var Acl = require('./acl.js');
var a = new Acl('acl.json');

a.grant('jonas', 'mytable', 'get', 'pelle');
a.isAllowed('mytable', 'get', 'pelle');       // true
a.isAllowed('mytable', 'get', 'sture');       // undefined (interpret as false)
a.revoke('jonas', 'mytable', 'get', 'pelle');
a.isAllowed('mytable', 'get', 'pelle');       // false

a.save();                                     // save json to acl.json

var b = new Acl('acl.json');
b.init()                                      // b now contains the permissions
.then(function(){                             // init returns a promise (see promisejs.org for details)
  console.log(b.grants);
});