1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
|
package itest
import (
"bytes"
"errors"
"fmt"
"io"
"log"
"os"
"path"
"path/filepath"
"testing"
"time"
"github.com/Netflix/go-expect"
"github.com/foxboron/go-uefi/authenticode"
"github.com/foxboron/go-uefi/efi/util"
"github.com/hugelgupf/vmtest"
"github.com/hugelgupf/vmtest/qemu"
)
func CopyFile(src, dst string) bool {
source, err := os.Open(src)
if err != nil {
log.Fatal(err)
}
defer source.Close()
f, err := os.OpenFile(dst, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
log.Fatal(err)
}
defer f.Close()
io.Copy(f, source)
si, err := os.Stat(src)
if err != nil {
log.Fatal(err)
}
err = os.Chmod(dst, si.Mode())
if err != nil {
log.Fatal(err)
}
return true
}
type VMTest struct {
ovmf string
secboot string
}
func (vm *VMTest) RunTests(packages ...string) func(t *testing.T) {
return func(t *testing.T) {
vmtest.RunGoTestsInVM(t, packages,
vmtest.WithVMOpt(
vmtest.WithSharedDir("ovmf/keys"),
vmtest.WithQEMUFn(
qemu.WithVMTimeout(time.Minute),
qemu.WithQEMUCommand("qemu-system-x86_64 -enable-kvm"),
qemu.WithKernel("bzImage"),
qemu.ArbitraryArgs(
"-m", "1G", "-machine", "type=q35,smm=on",
"-drive", fmt.Sprintf("if=pflash,format=raw,unit=0,file=%s,readonly=on", vm.secboot),
"-drive", fmt.Sprintf("if=pflash,format=raw,unit=1,file=%s", vm.ovmf),
),
)),
)
}
}
var (
errOK = errors.New("OK")
errFAIL = errors.New("FAIL")
startupnsh = `
@echo -off
echo Starting UEFI application...
fs0:
HelloWorld.efi.signed
`
)
// Signs HelloWorld.efi and attempts to run it within tianocore
func (v *VMTest) RunKernelTests(packages ...string) func(t *testing.T) {
return func(t *testing.T) {
dir := t.TempDir()
// Get some signing keys
dbPem, _ := os.ReadFile("ovmf/keys/db/db.pem")
dbKey, _ := os.ReadFile("ovmf/keys/db/db.key")
key, _ := util.ReadKey(dbKey)
cert, _ := util.ReadCert(dbPem)
// Sign HelloWorld.efi binary
peFile, _ := os.Open("binaries/HelloWorld.efi")
file, err := authenticode.Parse(peFile)
if err != nil {
t.Fatalf("failed authenticode.Parse: %v", err)
}
_, err = file.Sign(key, cert)
if err != nil {
t.Fatalf("failed PECOFFBinary.Sign: %v", err)
}
os.WriteFile(filepath.Join(dir, "HelloWorld.efi.signed"), file.Bytes(), 0o755)
os.WriteFile(filepath.Join(dir, "startup.nsh"), []byte(startupnsh), 0o755)
vm := vmtest.StartVM(t,
vmtest.WithArch(qemu.ArchAMD64),
vmtest.WithQEMUFn(
qemu.WithQEMUCommand("qemu-system-x86_64"),
qemu.WithVMTimeout(time.Minute),
qemu.WithKernel(""),
qemu.ReadOnlyDirectory(dir),
qemu.ArbitraryArgs(
// Disabled iPXE boot
"-net", "none",
"-machine", "type=q35,smm=on",
"-drive", fmt.Sprintf("if=pflash,format=raw,unit=0,file=%s,readonly", v.secboot),
"-drive", fmt.Sprintf("if=pflash,format=raw,unit=1,file=%s", v.ovmf)),
func() qemu.Fn {
return func(alloc *qemu.IDAllocator, opts *qemu.Options) error {
opts.KernelArgs = ""
return nil
}
}(),
),
)
go vm.Wait()
_, err = vm.Console.Expect(
expect.String("Access Denied").Then(func(buf *bytes.Buffer) error {
return errFAIL
}),
expect.String("HelloWorld").Then(func(buf *bytes.Buffer) error {
return errOK
}),
)
if errors.Is(err, errFAIL) {
t.Fatalf("failed signature validation")
}
}
}
// Sets up the test by making a copy of the OVMF files from the system
func WithVM(t *testing.T, fn func(*VMTest)) {
t.Helper()
dir := t.TempDir()
vm := VMTest{
ovmf: path.Join(dir, "OVMF_VARS.fd"),
secboot: path.Join(dir, "OVMF_CODE.secboot.fd"),
}
CopyFile("/usr/share/edk2-ovmf/x64/OVMF_VARS.fd", vm.ovmf)
CopyFile("/usr/share/edk2-ovmf/x64/OVMF_CODE.secboot.fd", vm.secboot)
fn(&vm)
}
func TestSecureBoot(t *testing.T) {
os.Setenv("VMTEST_QEMU", "qemu-system-x86_64")
WithVM(t, func(vm *VMTest) {
t.Run("Enroll keys", vm.RunTests("github.com/foxboron/go-uefi/tests/tests/enroll_keys"))
t.Run("Secure Boot Enabled", vm.RunTests("github.com/foxboron/go-uefi/tests/tests/secure_boot_enabled"))
t.Run("Boot signed kernel", vm.RunKernelTests())
t.Run("Modify dbx variable", vm.RunTests("github.com/foxboron/go-uefi/tests/tests/modify_dbx"))
t.Run("Replace PK and rotate keys", vm.RunTests("github.com/foxboron/go-uefi/tests/tests/remove_pk"))
})
}
|
