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// Copyright 2016-2017 VMware, Inc. All Rights Reserved.
//
// 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 vmcheck
import (
"encoding/binary"
"fmt"
"testing"
)
var (
intelID = []byte("GenuineIntel")
vmwID = []byte("VMwareVMware")
errPerm = fmt.Errorf("operation not permitted")
errAccess = fmt.Errorf("access denied")
)
func TestVirtualWorld(t *testing.T) {
leUint32 := binary.LittleEndian.Uint32
data := []struct {
scenario string
hv bool
id []byte
portAccess error
bdoorKnock error
resp bool
}{
{"vmware", true, vmwID, nil, nil, true},
{"vmware no backdoor", true, vmwID, errPerm, errAccess, false},
{"physical", false, intelID, errPerm, errAccess, false},
}
for _, tt := range data {
tt := tt
t.Run(tt.scenario, func(t *testing.T) {
p := platform{
accessPorts: func() error { return tt.portAccess },
cpuid: func(eax, _ uint32) (uint32, uint32, uint32, uint32) {
if eax == 0x1 {
if tt.hv {
return 0, 0, uint32(1 << 31), 0
}
return 0, 0, 0, 0
}
if eax == 0x40000000 {
return 0, leUint32(tt.id[:]), leUint32(tt.id[4:]), leUint32(tt.id[8:])
}
t.Fatal(fmt.Errorf("unexpected cpuid call"))
return 0, 0, 0, 0
},
knock: func() (bool, error) {
if tt.bdoorKnock == nil {
return true, nil
}
return false, tt.bdoorKnock
},
}
v, err := p.isVirtualWorld(false)
if tt.resp {
if !v || err != nil {
t.Fatal("expected to be virtual")
}
return
}
if v {
t.Fatal("wrongly detected as virtual")
}
if err != nil {
if tt.portAccess != nil && err == tt.portAccess {
return
}
if tt.bdoorKnock != nil && err == tt.bdoorKnock {
return
}
t.Fatal("unexpected error")
}
})
}
}
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