mirror of
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96 lines
3.1 KiB
Go
96 lines
3.1 KiB
Go
// Copyright 2021 Harness Inc. All rights reserved.
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// Use of this source code is governed by the Polyform Free Trial License
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// that can be found in the LICENSE.md file for this repository.
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package guard
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import (
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"errors"
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"fmt"
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"net/http"
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"github.com/harness/gitness/internal/api/render"
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"github.com/harness/gitness/internal/api/request"
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"github.com/harness/gitness/types"
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"github.com/harness/gitness/types/enum"
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)
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/*
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* Returns a middleware that guards repository related handlers from being executed.
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* Only principals that are authorized are able to execute the handler, everyone else is forbidden,
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* unless orPublic is configured and the repository is public.
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*
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* Assumes the repository is already available in the request context.
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*/
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func (e *Guard) ForRepo(requiredPermission enum.Permission, orPublic bool) func(http.Handler) http.Handler {
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return func(h http.Handler) http.Handler {
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return e.Repo(requiredPermission, orPublic, h.ServeHTTP)
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}
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}
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/*
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* Returns an http.HandlerFunc that guards a repository related http.HandlerFunc from being executed.
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* Only principals that are authorized are able to execute the handler, everyone else is forbidden,
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* unless orPublic is configured and the repository is public.
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*
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* Assumes the repository is already available in the request context.
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*/
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func (g *Guard) Repo(permission enum.Permission, orPublic bool, guarded http.HandlerFunc) http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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rep, ok := request.RepoFrom(ctx)
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if !ok {
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render.InternalError(w, errors.New("Expected repository to be available."))
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return
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}
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// Enforce permission (renders error)
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if !(orPublic && rep.IsPublic) && !g.EnforceRepo(w, r, permission, rep.Fqn) {
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return
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}
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// executed guarded function
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guarded(w, r)
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}
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}
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/*
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* Enforces that the executing principal has requested permission on the repository.
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* Returns true if that is the case, otherwise renders the appropriate error and returns false.
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*/
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func (g *Guard) EnforceRepo(w http.ResponseWriter, r *http.Request, permission enum.Permission, fqn string) bool {
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parentSpace, name, err := types.DisectFqn(fqn)
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if err != nil {
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render.InternalError(w, errors.New(fmt.Sprintf("Failed to disect fqn '%s' into scope: %s", fqn, err)))
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return false
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}
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scope := &types.Scope{SpaceFqn: parentSpace}
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resource := &types.Resource{
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Type: enum.ResourceTypeRepo,
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Name: name,
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}
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return g.Enforce(w, r, scope, resource, permission)
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}
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/*
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* Checks whether the principal executing the request has the requested permission on the repository.
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* Returns nil if the user is confirmed to be permitted to execute the action, otherwise returns errors
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* NotAuthenticated, NotAuthorized, or any unerlaying error.
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*/
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func (g *Guard) CheckRepo(r *http.Request, permission enum.Permission, fqn string) error {
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parentSpace, name, err := types.DisectFqn(fqn)
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if err != nil {
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return errors.New(fmt.Sprintf("Failed to disect fqn '%s' into scope: %s", fqn, err))
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}
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scope := &types.Scope{SpaceFqn: parentSpace}
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resource := &types.Resource{
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Type: enum.ResourceTypeRepo,
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Name: name,
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}
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return g.Check(r, scope, resource, permission)
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}
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