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feat: add authorization for the API layer
Signed-off-by: Donnie Adams <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package authn | ||
|
|
||
| import ( | ||
| "net/http" | ||
|
|
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| "github.com/otto8-ai/otto8/pkg/api/authz" | ||
| "k8s.io/apiserver/pkg/authentication/authenticator" | ||
| "k8s.io/apiserver/pkg/authentication/user" | ||
| ) | ||
|
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| type Anonymous struct { | ||
| } | ||
|
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| func (n Anonymous) AuthenticateRequest(*http.Request) (*authenticator.Response, bool, error) { | ||
| return &authenticator.Response{ | ||
| User: &user.DefaultInfo{ | ||
| UID: "anonymous", | ||
| Name: "anonymous", | ||
| Groups: []string{authz.UnauthenticatedGroup}, | ||
| }, | ||
| }, true, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,29 @@ | ||
| package authn | ||
|
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| import ( | ||
| "net/http" | ||
|
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| "k8s.io/apiserver/pkg/authentication/authenticator" | ||
| "k8s.io/apiserver/pkg/authentication/user" | ||
| ) | ||
|
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| type Authenticator struct { | ||
| authenticator authenticator.Request | ||
| } | ||
|
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| func NewAuthenticator(authenticator authenticator.Request) *Authenticator { | ||
| return &Authenticator{ | ||
| authenticator: authenticator, | ||
| } | ||
| } | ||
|
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| func (a *Authenticator) Authenticate(req *http.Request) (user.Info, error) { | ||
| resp, ok, err := a.authenticator.AuthenticateRequest(req) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if !ok { | ||
| panic("authentication should always succeed") | ||
| } | ||
| return resp.User, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,21 @@ | ||
| package authn | ||
|
|
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| import ( | ||
| "net/http" | ||
|
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| "github.com/otto8-ai/otto8/pkg/api/authz" | ||
| "k8s.io/apiserver/pkg/authentication/authenticator" | ||
| "k8s.io/apiserver/pkg/authentication/user" | ||
| ) | ||
|
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| type NoAuth struct { | ||
| } | ||
|
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| func (n NoAuth) AuthenticateRequest(*http.Request) (*authenticator.Response, bool, error) { | ||
| return &authenticator.Response{ | ||
| User: &user.DefaultInfo{ | ||
| Name: "nobody", | ||
| Groups: []string{authz.AdminGroup, authz.AuthenticatedGroup}, | ||
| }, | ||
| }, true, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| package authz | ||
|
|
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| import ( | ||
| "net/http" | ||
| "slices" | ||
|
|
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| "k8s.io/apiserver/pkg/authentication/user" | ||
| ) | ||
|
|
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| const ( | ||
| AdminGroup = "admin" | ||
| AuthenticatedGroup = "authenticated" | ||
| UnauthenticatedGroup = "unauthenticated" | ||
|
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| // anyGroup is an internal group that allows access to any group | ||
| anyGroup = "*" | ||
| ) | ||
|
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| type Authorizer struct { | ||
| rules []rule | ||
| } | ||
|
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| func NewAuthorizer() *Authorizer { | ||
| return &Authorizer{ | ||
| rules: defaultRules(), | ||
| } | ||
| } | ||
|
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| func (a *Authorizer) Authorize(req *http.Request, user user.Info) bool { | ||
| userGroups := user.GetGroups() | ||
| for _, r := range a.rules { | ||
| if r.group == anyGroup || slices.Contains(userGroups, r.group) { | ||
| if _, pattern := r.mux.Handler(req); pattern != "" { | ||
| return true | ||
| } | ||
| } | ||
| } | ||
|
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| return false | ||
| } | ||
|
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| type rule struct { | ||
| group string | ||
| mux *http.ServeMux | ||
| } | ||
|
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| func defaultRules() []rule { | ||
| var ( | ||
| rules []rule | ||
| f = (*fake)(nil) | ||
| ) | ||
|
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| // Build admin mux, admins can assess any URL | ||
| adminMux := http.NewServeMux() | ||
| adminMux.Handle("/", f) | ||
|
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| rules = append(rules, rule{ | ||
| group: AdminGroup, | ||
| mux: adminMux, | ||
| }) | ||
|
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| // Build mux that anyone can access | ||
| anyMux := http.NewServeMux() | ||
| anyMux.Handle("POST /api/webhooks/{id}", f) | ||
|
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| anyMux.Handle("GET /api/token-request/{id}", f) | ||
| anyMux.Handle("POST /api/token-request", f) | ||
| anyMux.Handle("GET /api/token-request/{id}/{service}", f) | ||
|
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| anyMux.Handle("GET /api/auth-providers", f) | ||
| anyMux.Handle("GET /api/auth-providers/{slug}", f) | ||
|
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| anyMux.Handle("GET /api/oauth/start/{id}/{service}", f) | ||
| anyMux.Handle("/api/oauth/redirect/{service}", f) | ||
|
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| anyMux.Handle("GET /api/app-oauth/authorize/{id}", f) | ||
| anyMux.Handle("GET /api/app-oauth/refresh/{id}", f) | ||
| anyMux.Handle("GET /api/app-oauth/callback/{id}", f) | ||
| anyMux.Handle("GET /api/app-oauth/get-token", f) | ||
|
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| rules = append(rules, rule{ | ||
| group: anyGroup, | ||
| mux: anyMux, | ||
| }) | ||
|
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| return rules | ||
| } | ||
|
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| // fake is a fake handler that does nothing | ||
| type fake struct{} | ||
|
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| func (f *fake) ServeHTTP(http.ResponseWriter, *http.Request) {} |
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