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Programming language: Go
License: MIT License
Latest version: v2.2.0

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README

goRBAC

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goRBAC provides a lightweight role-based access control implementation in Golang.

For the purposes of this package:

* an identity has one or more roles.
* a role requests access to a permission.
* a permission is given to a role.

Thus, RBAC has the following model:

* many to many relationship between identities and roles.
* many to many relationship between roles and permissions.
* roles can have a parent role (inheriting permissions).

Version

Currently, goRBAC has two versions:

Version 1 is the original design which will only be mantained to fix bugs.

Version 2 is the new design which will be continually mantained with a stable API.

The master branch will be under development with a new API and can be changed without notice.

Install

Install the package:

$ go get github.com/mikespook/gorbac

Usage

Although you can adjust the RBAC instance anytime and it's absolutely safe, the library is designed for use with two phases:

  1. Preparing

  2. Checking

Preparing

Import the library:

import "github.com/mikespook/gorbac"

Get a new instance of RBAC:

rbac := gorbac.New()

Get some new roles:

rA := gorbac.NewStdRole("role-a")
rB := gorbac.NewStdRole("role-b")
rC := gorbac.NewStdRole("role-c")
rD := gorbac.NewStdRole("role-d")
rE := gorbac.NewStdRole("role-e")

Get some new permissions:

pA := gorbac.NewStdPermission("permission-a")
pB := gorbac.NewStdPermission("permission-b")
pC := gorbac.NewStdPermission("permission-c")
pD := gorbac.NewStdPermission("permission-d")
pE := gorbac.NewStdPermission("permission-e")

Add the permissions to roles:

rA.Assign(pA)
rB.Assign(pB)
rC.Assign(pC)
rD.Assign(pD)
rE.Assign(pE)

Also, you can implement gorbac.Role and gorbac.Permission for your own data structure.

After initialization, add the roles to the RBAC instance:

rbac.Add(rA)
rbac.Add(rB)
rbac.Add(rC)
rbac.Add(rD)
rbac.Add(rE)

And set the inheritance:

rbac.SetParent("role-a", "role-b")
rbac.SetParents("role-b", []string{"role-c", "role-d"})
rbac.SetParent("role-e", "role-d")

Checking

Checking the permission is easy:

if rbac.IsGranted("role-a", pA, nil) &&
    rbac.IsGranted("role-a", pB, nil) &&
    rbac.IsGranted("role-a", pC, nil) &&
    rbac.IsGranted("role-a", pD, nil) {
    fmt.Println("The role-a has been granted permis-a, b, c and d.")
}

And there are some built-in util-functions: InherCircle, AnyGranted, AllGranted. Please open an issue for the new built-in requirement.

E.g.:

rbac.SetParent("role-c", "role-a")
if err := gorbac.InherCircle(rbac); err != nil {
    fmt.Println("A circle inheratance occurred.")
}

Persistence

The most asked question is how to persist the goRBAC instance. Please check the post HOW TO PERSIST GORBAC INSTANCE for the details.

Patches

2016-03-03

gofmt -w -r 'AssignPermission -> Assign' .
gofmt -w -r 'RevokePermission -> Revoke' .

Authors

Open Source - MIT Software License

See LICENSE.


*Note that all licence references and agreements mentioned in the gorbac README section above are relevant to that project's source code only.