143 lines
4.4 KiB
Go
143 lines
4.4 KiB
Go
// Copyright 2019 Drone IO, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package acl
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import (
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"net/http"
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"github.com/drone/drone/core"
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"github.com/drone/drone/handler/api/errors"
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"github.com/drone/drone/handler/api/render"
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"github.com/drone/drone/handler/api/request"
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"github.com/drone/drone/logger"
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"github.com/go-chi/chi"
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"github.com/sirupsen/logrus"
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)
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// CheckReadAccess returns an http.Handler middleware that authorizes only
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// authenticated users with read repository access to proceed to the next
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// handler in the chain.
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func CheckReadAccess() func(http.Handler) http.Handler {
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return CheckAccess(true, false, false)
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}
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// CheckWriteAccess returns an http.Handler middleware that authorizes only
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// authenticated users with write repository access to proceed to the next
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// handler in the chain.
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func CheckWriteAccess() func(http.Handler) http.Handler {
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return CheckAccess(true, true, false)
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}
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// CheckAdminAccess returns an http.Handler middleware that authorizes only
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// authenticated users with admin repository access to proceed to the next
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// handler in the chain.
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func CheckAdminAccess() func(http.Handler) http.Handler {
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return CheckAccess(true, true, true)
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}
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// CheckAccess returns an http.Handler middleware that authorizes only
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// authenticated users with the required read, write or admin access
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// permissions to the requested repository resource.
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func CheckAccess(read, write, admin bool) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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var (
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ctx = r.Context()
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owner = chi.URLParam(r, "owner")
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name = chi.URLParam(r, "name")
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)
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log := logger.FromRequest(r).
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WithField("namespace", owner).
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WithField("name", name)
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user, ok := request.UserFrom(ctx)
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switch {
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case ok == false && write == true:
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render.Unauthorized(w, errors.ErrUnauthorized)
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log.Debugln("api: authentication required for write access")
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return
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case ok == false && admin == true:
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render.Unauthorized(w, errors.ErrUnauthorized)
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log.Debugln("api: authentication required for admin access")
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return
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case ok == true && user.Admin == true:
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log.Debugln("api: root access granted")
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next.ServeHTTP(w, r)
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return
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}
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repo, noRepo := request.RepoFrom(ctx)
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if !noRepo {
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// this should never happen. the repository
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// should always be injected into the context
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// by an upstream handler in the chain.
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log.Errorln("api: null repository in context")
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render.NotFound(w, errors.ErrNotFound)
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return
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}
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log = log.WithField("visibility", repo.Visibility)
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switch {
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case admin == true: // continue
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case write == true: // continue
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case repo.Visibility == core.VisibilityPublic:
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log.Debugln("api: read access granted")
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next.ServeHTTP(w, r)
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return
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case ok == false:
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render.Unauthorized(w, errors.ErrUnauthorized)
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log.Debugln("api: authentication required")
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return
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case ok == true && repo.Visibility == core.VisibilityInternal:
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log.Debugln("api: read access granted")
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next.ServeHTTP(w, r)
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return
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}
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perm, ok := request.PermFrom(ctx)
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if !ok {
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render.NotFound(w, errors.ErrNotFound)
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log.Debugln("api: repository permissions not found")
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return
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}
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log = log.WithFields(
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logrus.Fields{
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"read": perm.Read,
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"write": perm.Write,
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"admin": perm.Admin,
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},
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)
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switch {
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case read == true && perm.Read == false:
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render.NotFound(w, errors.ErrNotFound)
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log.Debugln("api: read access required")
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case write == true && perm.Write == false:
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render.NotFound(w, errors.ErrNotFound)
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log.Debugln("api: write access required")
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case admin == true && perm.Admin == false:
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render.NotFound(w, errors.ErrNotFound)
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log.Debugln("api: admin access required")
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default:
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log.Debug("api: access granted")
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next.ServeHTTP(w, r.WithContext(
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request.WithPerm(ctx, perm),
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))
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}
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})
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}
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}
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