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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
|
# SPDX-License-Identifier: GPL-2.0+
# Copyright (c) 2019, Linaro Limited
# Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
#
# U-Boot UEFI: Signed Image Authentication Test
"""
This test verifies image authentication for signed images.
"""
import pytest
@pytest.mark.boardspec('sandbox')
@pytest.mark.buildconfigspec('efi_secure_boot')
@pytest.mark.buildconfigspec('cmd_efidebug')
@pytest.mark.buildconfigspec('cmd_fat')
@pytest.mark.buildconfigspec('cmd_nvedit_efi')
@pytest.mark.slow
class TestEfiSignedImage(object):
def test_efi_signed_image_auth1(self, u_boot_console, efi_boot_env):
"""
Test Case 1 - Secure boot is not in force
"""
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 1a'):
# Test Case 1a, run signed image if no PK
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld.efi.signed -s ""',
'efidebug boot next 1',
'bootefi bootmgr'])
assert 'Hello, world!' in ''.join(output)
with u_boot_console.log.section('Test Case 1b'):
# Test Case 1b, run unsigned image if no PK
output = u_boot_console.run_command_list([
'efidebug boot add -b 2 HELLO2 host 0:1 /helloworld.efi -s ""',
'efidebug boot next 2',
'bootefi bootmgr'])
assert 'Hello, world!' in ''.join(output)
def test_efi_signed_image_auth2(self, u_boot_console, efi_boot_env):
"""
Test Case 2 - Secure boot is in force,
authenticated by db (TEST_db certificate in db)
"""
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 2a'):
# Test Case 2a, db is not yet installed
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld.efi.signed -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert('\'HELLO1\' failed' in ''.join(output))
assert('efi_start_image() returned: 26' in ''.join(output))
output = u_boot_console.run_command_list([
'efidebug boot add -b 2 HELLO2 host 0:1 /helloworld.efi -s ""',
'efidebug boot next 2',
'efidebug test bootmgr'])
assert '\'HELLO2\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
with u_boot_console.log.section('Test Case 2b'):
# Test Case 2b, authenticated by db
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 2',
'efidebug test bootmgr'])
assert '\'HELLO2\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'bootefi bootmgr'])
assert 'Hello, world!' in ''.join(output)
def test_efi_signed_image_auth3(self, u_boot_console, efi_boot_env):
"""
Test Case 3 - rejected by dbx (TEST_db certificate in dbx)
"""
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 3a'):
# Test Case 3a, rejected by dbx
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
with u_boot_console.log.section('Test Case 3b'):
# Test Case 3b, rejected by dbx even if db allows
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
def test_efi_signed_image_auth4(self, u_boot_console, efi_boot_env):
"""
Test Case 4 - revoked by dbx (digest of TEST_db certificate in dbx)
"""
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 4'):
# Test Case 4, rejected by dbx
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 dbx_hash.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
def test_efi_signed_image_auth5(self, u_boot_console, efi_boot_env):
"""
Test Case 5 - multiple signatures
one signed with TEST_db, and
one signed with TEST_db1
"""
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 5a'):
# Test Case 5a, authenticated even if only one of signatures
# is verified
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert 'Hello, world!' in ''.join(output)
with u_boot_console.log.section('Test Case 5b'):
# Test Case 5b, authenticated if both signatures are verified
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 db1.auth',
'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'efidebug test bootmgr'])
assert 'Hello, world!' in ''.join(output)
with u_boot_console.log.section('Test Case 5c'):
# Test Case 5c, rejected if one of signatures (digest of
# certificate) is revoked
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 dbx_hash.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
with u_boot_console.log.section('Test Case 5d'):
# Test Case 5d, rejected if both of signatures are revoked
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 dbx_hash1.auth',
'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize dbx'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
# Try rejection in reverse order.
u_boot_console.restart_uboot()
with u_boot_console.log.section('Test Case 5e'):
# Test Case 5e, authenticated even if only one of signatures
# is verified. Same as before but reject dbx_hash1.auth only
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
'fatload host 0:1 4000000 db1.auth',
'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db',
'fatload host 0:1 4000000 dbx_hash1.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
def test_efi_signed_image_auth6(self, u_boot_console, efi_boot_env):
"""
Test Case 6 - using digest of signed image in database
"""
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 6a'):
# Test Case 6a, verified by image's digest in db
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 db_hello_signed.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed -s ""',
'efidebug boot next 1',
'bootefi bootmgr'])
assert 'Hello, world!' in ''.join(output)
with u_boot_console.log.section('Test Case 6b'):
# Test Case 6b, rejected by TEST_db certificate in dbx
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 dbx_db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
with u_boot_console.log.section('Test Case 6c'):
# Test Case 6c, rejected by image's digest in dbx
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 dbx_hello_signed.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
def test_efi_signed_image_auth7(self, u_boot_console, efi_boot_env):
"""
Test Case 7 - Reject images based on the sha384/512 of their x509 cert
"""
# sha384 of an x509 cert in dbx
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 7a'):
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
'fatload host 0:1 4000000 db1.auth',
'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db',
'fatload host 0:1 4000000 dbx_hash384.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
# sha512 of an x509 cert in dbx
u_boot_console.restart_uboot()
with u_boot_console.log.section('Test Case 7b'):
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
'fatload host 0:1 4000000 db1.auth',
'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db',
'fatload host 0:1 4000000 dbx_hash512.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)
def test_efi_signed_image_auth8(self, u_boot_console, efi_boot_env):
"""
Test Case 8 - Secure boot is in force,
Same as Test Case 2 but the image binary to be loaded
was willfully modified (forged)
Must be rejected.
"""
u_boot_console.restart_uboot()
disk_img = efi_boot_env
with u_boot_console.log.section('Test Case 8a'):
# Test Case 8a, Secure boot is not yet forced
output = u_boot_console.run_command_list([
'host bind 0 %s' % disk_img,
'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld_forged.efi.signed -s ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert('hELLO, world!' in ''.join(output))
with u_boot_console.log.section('Test Case 8b'):
# Test Case 8b, Install signature database and verify the image
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 db.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
'fatload host 0:1 4000000 KEK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
'fatload host 0:1 4000000 PK.auth',
'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot next 1',
'efidebug test bootmgr'])
assert(not 'hELLO, world!' in ''.join(output))
assert('\'HELLO1\' failed' in ''.join(output))
assert('efi_start_image() returned: 26' in ''.join(output))
|