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// Copyright 2021 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package seccheck
import (
"errors"
"testing"
"gvisor.dev/gvisor/pkg/context"
)
type testChecker struct {
CheckerDefaults
onClone func(ctx context.Context, mask CloneFieldSet, info CloneInfo) error
}
// Clone implements Checker.Clone.
func (c *testChecker) Clone(ctx context.Context, mask CloneFieldSet, info CloneInfo) error {
if c.onClone == nil {
return nil
}
return c.onClone(ctx, mask, info)
}
func TestNoChecker(t *testing.T) {
var s state
if s.Enabled(PointClone) {
t.Errorf("Enabled(PointClone): got true, wanted false")
}
}
func TestCheckerNotRegisteredForPoint(t *testing.T) {
var s state
s.AppendChecker(&testChecker{}, &CheckerReq{})
if s.Enabled(PointClone) {
t.Errorf("Enabled(PointClone): got true, wanted false")
}
}
func TestCheckerRegistered(t *testing.T) {
var s state
checkerCalled := false
s.AppendChecker(&testChecker{onClone: func(ctx context.Context, mask CloneFieldSet, info CloneInfo) error {
checkerCalled = true
return nil
}}, &CheckerReq{
Points: []Point{PointClone},
Clone: CloneFields{
Credentials: true,
},
})
if !s.Enabled(PointClone) {
t.Errorf("Enabled(PointClone): got false, wanted true")
}
if !s.CloneReq().Contains(CloneFieldCredentials) {
t.Errorf("CloneReq().Contains(CloneFieldCredentials): got false, wanted true")
}
if err := s.Clone(context.Background(), CloneFieldSet{}, &CloneInfo{}); err != nil {
t.Errorf("Clone(): got %v, wanted nil", err)
}
if !checkerCalled {
t.Errorf("Clone() did not call Checker.Clone()")
}
}
func TestMultipleCheckersRegistered(t *testing.T) {
var s state
checkersCalled := [2]bool{}
s.AppendChecker(&testChecker{onClone: func(ctx context.Context, mask CloneFieldSet, info CloneInfo) error {
checkersCalled[0] = true
return nil
}}, &CheckerReq{
Points: []Point{PointClone},
Clone: CloneFields{
Args: true,
},
})
s.AppendChecker(&testChecker{onClone: func(ctx context.Context, mask CloneFieldSet, info CloneInfo) error {
checkersCalled[1] = true
return nil
}}, &CheckerReq{
Points: []Point{PointClone},
Clone: CloneFields{
Created: TaskFields{
ThreadID: true,
},
},
})
if !s.Enabled(PointClone) {
t.Errorf("Enabled(PointClone): got false, wanted true")
}
// CloneReq() should return the union of requested fields from all calls to
// AppendChecker.
req := s.CloneReq()
if !req.Contains(CloneFieldArgs) {
t.Errorf("req.Contains(CloneFieldArgs): got false, wanted true")
}
if !req.Created.Contains(TaskFieldThreadID) {
t.Errorf("req.Created.Contains(TaskFieldThreadID): got false, wanted true")
}
if err := s.Clone(context.Background(), CloneFieldSet{}, &CloneInfo{}); err != nil {
t.Errorf("Clone(): got %v, wanted nil", err)
}
for i := range checkersCalled {
if !checkersCalled[i] {
t.Errorf("Clone() did not call Checker.Clone() index %d", i)
}
}
}
func TestCheckpointReturnsFirstCheckerError(t *testing.T) {
errFirstChecker := errors.New("first Checker error")
errSecondChecker := errors.New("second Checker error")
var s state
checkersCalled := [2]bool{}
s.AppendChecker(&testChecker{onClone: func(ctx context.Context, mask CloneFieldSet, info CloneInfo) error {
checkersCalled[0] = true
return errFirstChecker
}}, &CheckerReq{
Points: []Point{PointClone},
})
s.AppendChecker(&testChecker{onClone: func(ctx context.Context, mask CloneFieldSet, info CloneInfo) error {
checkersCalled[1] = true
return errSecondChecker
}}, &CheckerReq{
Points: []Point{PointClone},
})
if !s.Enabled(PointClone) {
t.Errorf("Enabled(PointClone): got false, wanted true")
}
if err := s.Clone(context.Background(), CloneFieldSet{}, &CloneInfo{}); err != errFirstChecker {
t.Errorf("Clone(): got %v, wanted %v", err, errFirstChecker)
}
if !checkersCalled[0] {
t.Errorf("Clone() did not call first Checker")
}
if checkersCalled[1] {
t.Errorf("Clone() called second Checker")
}
}
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