go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/scheduler/appengine/engine/permissions.go (about)

     1  // Copyright 2020 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package engine
    16  
    17  import (
    18  	"context"
    19  
    20  	"go.chromium.org/luci/common/logging"
    21  	"go.chromium.org/luci/server/auth"
    22  	"go.chromium.org/luci/server/auth/realms"
    23  )
    24  
    25  const adminGroup = "administrators"
    26  
    27  var (
    28  	PermJobsGet     = realms.RegisterPermission("scheduler.jobs.get")
    29  	PermJobsPause   = realms.RegisterPermission("scheduler.jobs.pause")
    30  	PermJobsResume  = realms.RegisterPermission("scheduler.jobs.resume")
    31  	PermJobsAbort   = realms.RegisterPermission("scheduler.jobs.abort")
    32  	PermJobsTrigger = realms.RegisterPermission("scheduler.jobs.trigger")
    33  )
    34  
    35  // CheckPermission returns nil if the caller has the given permission for the
    36  // job or ErrNoPermission otherwise.
    37  //
    38  // May also return transient errors.
    39  func CheckPermission(ctx context.Context, job *Job, perm realms.Permission) error {
    40  	ctx = logging.SetField(ctx, "JobID", job.JobID)
    41  
    42  	// Fallback to the @legacy realm if the job entity isn't updated yet.
    43  	realm := job.RealmID
    44  	if realm == "" {
    45  		realm = realms.Join(job.ProjectID, realms.LegacyRealm)
    46  	}
    47  
    48  	// Check realm's bindings (including conditional ones).
    49  	attrs := realms.Attrs{
    50  		"scheduler.job.name": job.JobName(),
    51  	}
    52  	switch yes, err := auth.HasPermission(ctx, perm, realm, attrs); {
    53  	case err != nil:
    54  		return err
    55  	case yes:
    56  		return nil
    57  	}
    58  
    59  	// Admins have implicit access to everything.
    60  	// TODO(vadimsh): We should probably remove this.
    61  	switch yes, err := auth.IsMember(ctx, adminGroup); {
    62  	case err != nil:
    63  		return err
    64  	case yes:
    65  		logging.Warningf(ctx, "ADMIN_FALLBACK: perm=%q job=%q caller=%q",
    66  			perm, job.JobID, auth.CurrentIdentity(ctx))
    67  		return nil
    68  	default:
    69  		return ErrNoPermission
    70  	}
    71  }