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test/py: efi_secboot: add a test against certificate revocation

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Revocation database (dbx) may have not only certificates, but also
message digests of certificates with revocation time
(EFI_CERT_X509_SHA256_GUILD).

In this test case, if the database has such a digest and if the value
matches to a certificate that created a given image's signature,
authentication should fail.

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

Set defined time stamp for dbx_hash.auth.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
AKASHI Takahiro 2020-07-08 14:02:01 +09:00 committed by Heinrich Schuchardt
parent 48ead6097b
commit c6361e73b5
2 changed files with 31 additions and 1 deletions
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6
test/py/tests/test_efi_secboot/conftest.py
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@ -106,12 +106,16 @@ def efi_boot_env(request, u_boot_config):
# db1-update
check_call('cd %s; %ssign-efi-sig-list -t "2020-04-06" -a -c KEK.crt -k KEK.key db db1.esl db1-update.auth'
% (mnt_point, EFITOOLS_PATH), shell=True)
# dbx
## dbx (TEST_dbx certificate)
check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_dbx/ -keyout dbx.key -out dbx.crt -nodes -days 365'
% mnt_point, shell=True)
check_call('cd %s; %scert-to-efi-sig-list -g %s dbx.crt dbx.esl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx.esl dbx.auth'
% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
shell=True)
## dbx_hash (digest of TEST_db certificate)
check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 db.crt dbx_hash.crl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx dbx_hash.crl dbx_hash.auth'
% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
shell=True)
# Copy image
check_call('cp %s %s' % (HELLO_PATH, mnt_point), shell=True)

26
test/py/tests/test_efi_secboot/test_signed.py
View File

@ -121,3 +121,29 @@ 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_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 1 HELLO host 0:1 /helloworld.efi.signed ""',
'efidebug boot next 1',
'efidebug test bootmgr'])
assert '\'HELLO\' failed' in ''.join(output)
assert 'efi_start_image() returned: 26' in ''.join(output)