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test/py: efi_secboot: add a test for verifying with digest of signed image

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Signature database (db or dbx) may have not only certificates that contain
a public key for RSA decryption, but also digests of signed images.

In this test case, if database has an image's digest (EFI_CERT_SHA256_GUID)
and if the value matches to a hash value calculated from image's binary,
authentication should pass in case of db, and fail in case of dbx.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>

Use defined time stamps for sign-efi-sig-list.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
AKASHI Takahiro 2020-07-08 14:02:03 +09:00 committed by Heinrich Schuchardt
parent 0c7772d40f
commit 7fdc02b3d7
2 changed files with 59 additions and 0 deletions
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10
test/py/tests/test_efi_secboot/conftest.py
View File

@ -120,6 +120,10 @@ def efi_boot_env(request, u_boot_config):
check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 db1.crt dbx_hash1.crl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx_hash1.crl dbx_hash1.auth'
% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
shell=True)
## dbx_db (with TEST_db certificate)
check_call('cd %s; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx db.esl dbx_db.auth'
% (mnt_point, EFITOOLS_PATH),
shell=True)
# Copy image
check_call('cp %s %s' % (HELLO_PATH, mnt_point), shell=True)
@ -134,6 +138,12 @@ def efi_boot_env(request, u_boot_config):
check_call('cd %s; %shash-to-efi-sig-list helloworld.efi db_hello.hash; %ssign-efi-sig-list -t "2020-04-07" -c KEK.crt -k KEK.key db db_hello.hash db_hello.auth'
% (mnt_point, EFITOOLS_PATH, EFITOOLS_PATH),
shell=True)
check_call('cd %s; %shash-to-efi-sig-list helloworld.efi.signed db_hello_signed.hash; %ssign-efi-sig-list -t "2020-04-03" -c KEK.crt -k KEK.key db db_hello_signed.hash db_hello_signed.auth'
% (mnt_point, EFITOOLS_PATH, EFITOOLS_PATH),
shell=True)
check_call('cd %s; %ssign-efi-sig-list -t "2020-04-07" -c KEK.crt -k KEK.key dbx db_hello_signed.hash dbx_hello_signed.auth'
% (mnt_point, EFITOOLS_PATH),
shell=True)
check_call('sudo umount %s' % loop_dev, shell=True)
check_call('sudo losetup -d %s' % loop_dev, shell=True)

49
test/py/tests/test_efi_secboot/test_signed.py
View File

@ -198,3 +198,52 @@ class TestEfiSignedImage(object):
'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,$filesize PK'])
assert 'Failed to set EFI variable' not in ''.join(output)
output = u_boot_console.run_command_list([
'efidebug boot add 1 HELLO host 0:1 /helloworld.efi.signed ""',
'efidebug boot next 1',
'bootefi bootmgr'])
assert 'Hello, world!' in ''.join(output)
with u_boot_console.log.section('Test Case 6b'):
# Test Case 6b, rejected by TEST_db certificate in dbx
output = u_boot_console.run_command_list([
'fatload host 0:1 4000000 dbx_db.auth',
'setenv -e -nv -bs -rt -at -i 4000000,$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)