[PATCH v4 7/7] test/py: efi_secboot: add test for intermediate certificates

Heinrich Schuchardt
2020-07-20T06:29:45Z

On 7/20/20 7:52 AM, AKASHI Takahiro wrote:
> Heinrich,
>
> On Fri, Jul 17, 2020 at 12:29:06PM +0200, Heinrich Schuchardt wrote:
>> On 17.07.20 09:16, AKASHI Takahiro wrote:
>>> In this test case, an image may have a signature with additional
>>> intermediate certificates. A chain of trust will be followed and all
>>> the certificates in the middle of chain must be verified before loading.
>>>
>>> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
>>
>> Thanks for providing all these tests and for rebasing on 53ce9a6ed98b6
>> ("test: use virt-make-fs to build image").
>
> You should have run autopep8 before your patch:)
>
>> Essentially this patch could have been split into two:
>>
>> * style corrections for existing code
>> * new tests
>
> Will split this patch into several commits.
>
>> Unfortunatly the setup not working correctly. 'make tests' shows:
>>
>> test/py/tests/test_efi_secboot/test_authvar.py FFFFF
>> test/py/tests/test_efi_secboot/test_signed.py .F..FF
>> test/py/tests/test_efi_secboot/test_signed_intca.py sss
>> test/py/tests/test_efi_secboot/test_unsigned.py ...
>
> As long as I run the tests in my local environment,
> I've never seen any failures.

Was that after rebasing on efi-2020-10?

>
>> SKIPPED [3] test/py/tests/test_efi_secboot/conftest.py:254: Setup
>> failed: cd build-sandbox/mnt_efisecure; sbsign --key TestCert.key --cert
>> TestCert.crt --addcert TestSub.crt --out helloworld.efi.signed_ab
>> helloworld.efi
>
> Please read the cover letter:
> ===8<===
> Prerequisite
> ============
> All the required patches have been merged.
> You can fetch the whole workable repository from here[1].
>
> One patch[2] to sbsigntools must also be applied so that we wil be able
> to sign an image with intermediate certificates. It is required here for
> testing.
>
> (snip)
>
> Test
> ====
> - The added new pytest (test_signed_intca.py) passed locally.
> - Travis CI passed, except the new pytest added here due to a new
> feature in sbsigntools as mentioned above.
> (the latest vesion is still running though.)
> ===>8===

Travis CI skips the tests currently:

test/py/tests/test_efi_secboot/test_authvar.py sssss
test/py/tests/test_efi_secboot/test_signed.py ssssss
test/py/tests/test_efi_secboot/test_unsigned.py sss

Tom did not apply
https://patchwork.ozlabs.org/project/uboot/patch/20200714061856.4487-1-xypron.glpk at gmx.de/
.

You would have to exchange the Dockerfile at the top of .

>
> I guess that you are not using the latest source of sbsigntools.

I am using Debian sbsigntool version: 0.9.2-2.

If you want to use any patched version of sbsigntool for testing, you
will have to proved the necessary patch for the Dockerfile in
https://gitlab.denx.de/u-boot/gitlab-ci-runner.git

and you will have to build the same sbsigntool for Travis.

>
>
>> If you replace as follows in test/run you get the extra skip messages:
>>
>> %s/--bd/-ra --bd/g
>>
>>> ---
>>> test/py/tests/test_efi_secboot/conftest.py | 134 ++++++++++++++++-
>>> test/py/tests/test_efi_secboot/defs.py | 8 +-
>>> test/py/tests/test_efi_secboot/openssl.cnf | 48 +++++++
>>> .../test_efi_secboot/test_signed_intca.py | 135 ++++++++++++++++++
>>> 4 files changed, 317 insertions(+), 8 deletions(-)
>>> create mode 100644 test/py/tests/test_efi_secboot/openssl.cnf
>>> create mode 100644 test/py/tests/test_efi_secboot/test_signed_intca.py
>>>
>>> diff --git a/test/py/tests/test_efi_secboot/conftest.py b/test/py/tests/test_efi_secboot/conftest.py
>>> index c6709700a876..20d0cbf3ab01 100644
>>> --- a/test/py/tests/test_efi_secboot/conftest.py
>>> +++ b/test/py/tests/test_efi_secboot/conftest.py
>>> @@ -37,7 +37,7 @@ def efi_boot_env(request, u_boot_config):
>>> global HELLO_PATH
>>>
>>> image_path = u_boot_config.persistent_data_dir
>>> - image_path = image_path + '/' + EFI_SECBOOT_IMAGE_NAME
>>> + image_path = image_path + '/' + EFI_SECBOOT_IMAGE_NAME + '.img'
>>
>> I would prefer a separate constant for
>> EFI_SECBOOT_IMAGE_NAME + '_intca.img'
>> to ensure that conftest.py and test_signed_intca.py use the same value.
>
> 'separate constant to use the same value?' I don't get your point.
>
> Anyhow, *.py files don't use a image file name directly, but
> get it from a test fixture.
> So I don't think that we need any change here.

It does not make sense to me to define a constant for half of the file
name and still relying on the rest to match between the different Python
tests. Please, provide constants for the whole file names.

>
>>>
>>> if HELLO_PATH == '':
>>
>> Shouldn't we set HELLO_PATH = 'lib/efi_loader/helloworld.efi' in defs.py
>> and use another variable name here?
>
> An explicit path is a remnant int the past when helloworld was not
> compiled properly.
> So I will delete all the stuff including the code below.
>
>> bin_path = u_boot_config.build_dir + '/' + HELLO_PATH
>>
>>> HELLO_PATH = u_boot_config.build_dir + '/lib/efi_loader/helloworld.efi'
>>
>> Capitalization should only be used for constants.
>>
>> Best regards
>>
>> Heinrich
>>
>>> @@ -87,21 +87,21 @@ 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 (TEST_dbx certificate)
>>> + # 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)
>>> + # 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)
>>> - ## dbx_hash1 (digest of TEST_db1 certificate)
>>> + # dbx_hash1 (digest of TEST_db1 certificate)
>>> 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)
>>> + # 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)
>>> @@ -112,10 +112,10 @@ def efi_boot_env(request, u_boot_config):
>>> # Sign image
>>> check_call('cd %s; sbsign --key db.key --cert db.crt helloworld.efi'
>>> % mnt_point, shell=True)
>>> - ## Sign already-signed image with another key
>>> + # Sign already-signed image with another key
>>> check_call('cd %s; sbsign --key db1.key --cert db1.crt --output helloworld.efi.signed_2sigs helloworld.efi.signed'
>>> % mnt_point, shell=True)
>>> - ## Digest image
>>> + # Digest image
>>> 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)
>>> @@ -136,3 +136,123 @@ def efi_boot_env(request, u_boot_config):
>>> yield image_path
>>> finally:
>>> call('rm -f %s' % image_path, shell=True)
>>> +
>>> +#
>>> +# Fixture for UEFI secure boot test of intermediate certificates
>>> +#
>>> +
>>> +
>>> + at pytest.fixture(scope='session')
>>> +def efi_boot_env_intca(request, u_boot_config):
>>> + """Set up a file system to be used in UEFI secure boot test
>>> + of intermediate certificates.
>>> +
>>> + Args:
>>> + request: Pytest request object.
>>> + u_boot_config: U-boot configuration.
>>> +
>>> + Return:
>>> + A path to disk image to be used for testing
>>> + """
>>> + global HELLO_PATH
>>> +
>>> + image_path = u_boot_config.persistent_data_dir
>>> + image_path = image_path + '/' + EFI_SECBOOT_IMAGE_NAME + '_intca.img'
>>> +
>>> + if HELLO_PATH == '':
>>
>> See comment above.
>>
>>> + HELLO_PATH = u_boot_config.build_dir + '/lib/efi_loader/helloworld.efi'
>>
>> Capitalization should only be used for constants.
>>
>>> +
>>> + try:
>>> + mnt_point = u_boot_config.build_dir + '/mnt_efisecure'
>>> + check_call('rm -rf {}'.format(mnt_point), shell=True)
>>> + check_call('mkdir -p {}'.format(mnt_point), shell=True)
>>> +
>>> + # Create signature database
>>> + # PK
>>> + check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_PK/ -keyout PK.key -out PK.crt -nodes -days 365'
>>> + % mnt_point, shell=True)
>>> + check_call('cd %s; %scert-to-efi-sig-list -g %s PK.crt PK.esl; %ssign-efi-sig-list -c PK.crt -k PK.key PK PK.esl PK.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>> + # KEK
>>> + check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_KEK/ -keyout KEK.key -out KEK.crt -nodes -days 365'
>>> + % mnt_point, shell=True)
>>> + check_call('cd %s; %scert-to-efi-sig-list -g %s KEK.crt KEK.esl; %ssign-efi-sig-list -c PK.crt -k PK.key KEK KEK.esl KEK.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>> +
>>> + # We will have three-tier hierarchy of certificates:
>>> + # TestRoot: Root CA (self-signed)
>>> + # TestSub: Intermediate CA (signed by Root CA)
>>> + # TestCert: User certificate (signed by Intermediate CA, and used
>>> + # for signing an image)
>>> + #
>>> + # NOTE:
>>> + # I consulted the following EDK2 document for certificate options:
>>> + # BaseTools/Source/Python/Pkcs7Sign/Readme.md
>>> + # Please not use them as they are in product system. They are
>>> + # for test purpose only.
>>> +
>>> + # TestRoot
>>> + check_call('cp %s/test/py/tests/test_efi_secboot/openssl.cnf %s'
>>> + % (u_boot_config.source_dir, mnt_point), shell=True)
>>> + check_call('cd %s; openssl genrsa -out TestRoot.key 2048; openssl req --config openssl.cnf -extensions v3_ca -new -x509 -days 365 -key TestRoot.key -out TestRoot.crt -subj "/CN=TEST_root/"; touch index.txt'
>>> + % mnt_point, shell=True)
>>> + # TestSub
>>> + check_call('cd %s; openssl genrsa -out TestSub.key 2048; openssl req -new -key TestSub.key -out TestSub.csr -subj "/CN=TEST_sub/"; openssl ca --config openssl.cnf -in TestSub.csr -out TestSub.crt -extensions v3_int_ca -days 365 -batch -rand_serial -cert TestRoot.crt -keyfile TestRoot.key'
>>> + % mnt_point, shell=True)
>>> + # TestCert
>>> + check_call('cd %s; openssl genrsa -out TestCert.key 2048; openssl req -new -key TestCert.key -out TestCert.csr -subj "/CN=TEST_cert/"; openssl ca --config openssl.cnf -in TestCert.csr -out TestCert.crt -extensions usr_cert -days 365 -batch -rand_serial -cert TestSub.crt -keyfile TestSub.key'
>>> + % mnt_point, shell=True)
>>> + # db
>>> + # for TestCert
>>> + check_call('cd %s; %scert-to-efi-sig-list -g %s TestCert.crt TestCert.esl; %ssign-efi-sig-list -c KEK.crt -k KEK.key db TestCert.esl db_a.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>> + # for TestSub
>>> + check_call('cd %s; %scert-to-efi-sig-list -g %s TestSub.crt TestSub.esl; %ssign-efi-sig-list -t "2020-07-16" -c KEK.crt -k KEK.key db TestSub.esl db_b.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>> + # for TestRoot
>>> + check_call('cd %s; %scert-to-efi-sig-list -g %s TestRoot.crt TestRoot.esl; %ssign-efi-sig-list -t "2020-07-17" -c KEK.crt -k KEK.key db TestRoot.esl db_c.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>> + ## dbx (hash of certificate with revocation time)
>>> + # for TestCert
>>> + check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 TestCert.crt TestCert.crl; %ssign-efi-sig-list -c KEK.crt -k KEK.key dbx TestCert.crl dbx_a.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>
>> Not to be corrected in this patch:
>>
>> -t 0 means revocation for all times.
>
> The values won't affect the test cases here,
> but I will add more *meaningful* values.
>
>> Shouldn't we have a test that checks that revocation time stamps are
>> correctly used? As we use explicit timestamps now for sign-efi-sig-list
>> this should be feasible.
>
> Good point, but it's orthogonal to "intermediate certificates" patch.

That is why I wrote "Not to be corrected in this patch".

Best regards

Heinrich

>
> -Takahiro Akashi
>
>
>
>>> + # for TestSub
>>> + check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 TestSub.crt TestSub.crl; %ssign-efi-sig-list -t "2020-07-18" -c KEK.crt -k KEK.key dbx TestSub.crl dbx_b.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>> + # for TestRoot
>>> + check_call('cd %s; %scert-to-efi-hash-list -g %s -t 0 -s 256 TestRoot.crt TestRoot.crl; %ssign-efi-sig-list -t "2020-07-19" -c KEK.crt -k KEK.key dbx TestRoot.crl dbx_c.auth'
>>> + % (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
>>> + shell=True)
>>> +
>>> + # Sign image
>>> + # additional intermediate certificates may be included
>>> + # in SignedData
>>> +
>>> + check_call('cp %s %s' % (HELLO_PATH, mnt_point), shell=True)
>>> + # signed by TestCert
>>> + check_call('cd %s; %ssbsign --key TestCert.key --cert TestCert.crt --out helloworld.efi.signed_a helloworld.efi'
>>> + % (mnt_point, SBSIGN_PATH), shell=True)
>>> + # signed by TestCert with TestSub in signature
>>> + check_call('cd %s; %ssbsign --key TestCert.key --cert TestCert.crt --addcert TestSub.crt --out helloworld.efi.signed_ab helloworld.efi'
>>> + % (mnt_point, SBSIGN_PATH), shell=True)
>>> + # signed by TestCert with TestSub and TestRoot in signature
>>> + check_call('cd %s; cat TestSub.crt TestRoot.crt > TestSubRoot.crt; %ssbsign --key TestCert.key --cert TestCert.crt --addcert TestSubRoot.crt --out helloworld.efi.signed_abc helloworld.efi'
>>> + % (mnt_point, SBSIGN_PATH), shell=True)
>>> +
>>> + check_call('virt-make-fs --partition=gpt --size=+1M --type=vfat {} {}'.format(mnt_point, image_path), shell=True)
>>> + check_call('rm -rf {}'.format(mnt_point), shell=True)
>>> +
>>> + except CalledProcessError as e:
>>> + pytest.skip('Setup failed: %s' % e.cmd)
>>> + return
>>> + else:
>>> + yield image_path
>>> + finally:
>>> + call('rm -f %s' % image_path, shell=True)
>>> diff --git a/test/py/tests/test_efi_secboot/defs.py b/test/py/tests/test_efi_secboot/defs.py
>>> index ba6b9f391e60..a26bbc103cd9 100644
>>> --- a/test/py/tests/test_efi_secboot/defs.py
>>> +++ b/test/py/tests/test_efi_secboot/defs.py
>>> @@ -1,14 +1,20 @@
>>> # SPDX-License-Identifier: GPL-2.0+
>>>
>>> # Disk image name
>>> -EFI_SECBOOT_IMAGE_NAME = 'test_efi_secboot.img'
>>> +EFI_SECBOOT_IMAGE_NAME = 'test_efi_secboot'
>>>
>>> # Owner guid
>>> GUID = '11111111-2222-3333-4444-123456789abc'
>>>
>>> # v1.5.1 or earlier of efitools has a bug in sha256 calculation, and
>>> # you need build a newer version on your own.
>>> +# The path must terminate with '/'.
>>> EFITOOLS_PATH = ''
>>>
>>> +# "--addcert" option of sbsign must be available, otherwise
>>> +# you need build a newer version on your own.
>>> +# The path must terminate with '/'.
>>> +SBSIGN_PATH = ''
>>> +
>>> # Hello World application for sandbox
>>> HELLO_PATH = ''
>>> diff --git a/test/py/tests/test_efi_secboot/openssl.cnf b/test/py/tests/test_efi_secboot/openssl.cnf
>>> new file mode 100644
>>> index 000000000000..f684f1df7e69
>>> --- /dev/null
>>> +++ b/test/py/tests/test_efi_secboot/openssl.cnf
>>> @@ -0,0 +1,48 @@
>>> +[ ca ]
>>> +default_ca = CA_default
>>> +
>>> +[ CA_default ]
>>> +new_certs_dir = .
>>> +database = ./index.txt
>>> +serial = ./serial
>>> +default_md = sha256
>>> +policy = policy_min
>>> +
>>> +[ req ]
>>> +distinguished_name = def_distinguished_name
>>> +
>>> +[def_distinguished_name]
>>> +
>>> +# Extensions
>>> +# -addext " ... = ..."
>>> +#
>>> +[ v3_ca ]
>>> + # Extensions for a typical Root CA.
>>> + basicConstraints = critical,CA:TRUE
>>> + keyUsage = critical, digitalSignature, cRLSign, keyCertSign
>>> + subjectKeyIdentifier = hash
>>> + authorityKeyIdentifier = keyid:always,issuer
>>> +
>>> +[ v3_int_ca ]
>>> + # Extensions for a typical intermediate CA.
>>> + basicConstraints = critical, CA:TRUE
>>> + keyUsage = critical, digitalSignature, cRLSign, keyCertSign
>>> + subjectKeyIdentifier = hash
>>> + authorityKeyIdentifier = keyid:always,issuer
>>> +
>>> +[ usr_cert ]
>>> + # Extensions for user end certificates.
>>> + basicConstraints = CA:FALSE
>>> + keyUsage = critical, nonRepudiation, digitalSignature, keyEncipherment
>>> + extendedKeyUsage = clientAuth, emailProtection
>>> + subjectKeyIdentifier = hash
>>> + authorityKeyIdentifier = keyid,issuer
>>> +
>>> +[ policy_min ]
>>> + countryName = optional
>>> + stateOrProvinceName = optional
>>> + localityName = optional
>>> + organizationName = optional
>>> + organizationalUnitName = optional
>>> + commonName = supplied
>>> + emailAddress = optional
>>> diff --git a/test/py/tests/test_efi_secboot/test_signed_intca.py b/test/py/tests/test_efi_secboot/test_signed_intca.py
>>> new file mode 100644
>>> index 000000000000..1240174758cf
>>> --- /dev/null
>>> +++ b/test/py/tests/test_efi_secboot/test_signed_intca.py
>>> @@ -0,0 +1,135 @@
>>> +# SPDX-License-Identifier: GPL-2.0+
>>> +# Copyright (c) 2020, Linaro Limited
>>> +# Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
>>> +#
>>> +# U-Boot UEFI: Image Authentication Test (signature with certificates chain)
>>> +
>>> +"""
>>> +This test verifies image authentication for a signed image which is signed
>>> +by user certificate and contains additional intermediate certificates in its
>>> +signature.
>>> +"""
>>> +
>>> +import pytest
>>> +
>>> +
>>> + at pytest.mark.boardspec('sandbox')
>>> + at pytest.mark.buildconfigspec('efi_secure_boot')
>>> + at pytest.mark.buildconfigspec('cmd_efidebug')
>>> + at pytest.mark.buildconfigspec('cmd_fat')
>>> + at pytest.mark.buildconfigspec('cmd_nvedit_efi')
>>> + at pytest.mark.slow
>>> +class TestEfiSignedImageExt(object):
>>> + def test_efi_signed_image_ext1(self, u_boot_console, efi_boot_env_intca):
>>> + """
>>> + Test Case 1 - authenticated by root CA in db
>>> + """
>>> + u_boot_console.restart_uboot()
>>> + disk_img = efi_boot_env_intca
>>> + with u_boot_console.log.section('Test Case 1a'):
>>> + # Test Case 1a, with no Int CA and not authenticated by root CA
>>> + output = u_boot_console.run_command_list([
>>> + 'host bind 0 %s' % disk_img,
>>> + 'fatload host 0:1 4000000 db_c.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,$filesize PK'])
>>> + assert 'Failed to set EFI variable' not in ''.join(output)
>>> +
>>> + output = u_boot_console.run_command_list([
>>> + 'efidebug boot add 1 HELLO_a host 0:1 /helloworld.efi.signed_a ""',
>>> + 'efidebug boot next 1',
>>> + 'efidebug test bootmgr'])
>>> + assert '\'HELLO_a\' failed' in ''.join(output)
>>> + assert 'efi_start_image() returned: 26' in ''.join(output)
>>> +
>>> + with u_boot_console.log.section('Test Case 1b'):
>>> + # Test Case 1b, signed and authenticated by root CA
>>> + output = u_boot_console.run_command_list([
>>> + 'efidebug boot add 2 HELLO_ab host 0:1 /helloworld.efi.signed_ab ""',
>>> + 'efidebug boot next 2',
>>> + 'bootefi bootmgr'])
>>> + assert 'Hello, world!' in ''.join(output)
>>> +
>>> + def test_efi_signed_image_ext2(self, u_boot_console, efi_boot_env_intca):
>>> + """
>>> + Test Case 2 - authenticated by root CA in db
>>> + """
>>> + u_boot_console.restart_uboot()
>>> + disk_img = efi_boot_env_intca
>>> + with u_boot_console.log.section('Test Case 2a'):
>>> + # Test Case 2a, unsigned and not authenticated by root CA
>>> + output = u_boot_console.run_command_list([
>>> + 'host bind 0 %s' % disk_img,
>>> + 'fatload host 0:1 4000000 KEK.auth',
>>> + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize KEK',
>>> + 'fatload host 0:1 4000000 PK.auth',
>>> + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize PK'])
>>> + assert 'Failed to set EFI variable' not in ''.join(output)
>>> +
>>> + output = u_boot_console.run_command_list([
>>> + 'efidebug boot add 1 HELLO_abc host 0:1 /helloworld.efi.signed_abc ""',
>>> + 'efidebug boot next 1',
>>> + 'efidebug test bootmgr'])
>>> + assert '\'HELLO_abc\' failed' in ''.join(output)
>>> + assert 'efi_start_image() returned: 26' in ''.join(output)
>>> +
>>> + with u_boot_console.log.section('Test Case 2b'):
>>> + # Test Case 2b, signed and authenticated by root CA
>>> + output = u_boot_console.run_command_list([
>>> + 'fatload host 0:1 4000000 db_b.auth',
>>> + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
>>> + 'efidebug boot next 1',
>>> + 'efidebug test bootmgr'])
>>> + assert '\'HELLO_abc\' failed' in ''.join(output)
>>> + assert 'efi_start_image() returned: 26' in ''.join(output)
>>> +
>>> + with u_boot_console.log.section('Test Case 2c'):
>>> + # Test Case 2c, signed and authenticated by root CA
>>> + output = u_boot_console.run_command_list([
>>> + 'fatload host 0:1 4000000 db_c.auth',
>>> + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize db',
>>> + 'efidebug boot next 1',
>>> + 'efidebug test bootmgr'])
>>> + assert 'Hello, world!' in ''.join(output)
>>> +
>>> + def test_efi_signed_image_ext3(self, u_boot_console, efi_boot_env_intca):
>>> + """
>>> + Test Case 3 - revoked by dbx
>>> + """
>>> + u_boot_console.restart_uboot()
>>> + disk_img = efi_boot_env_intca
>>> + with u_boot_console.log.section('Test Case 3a'):
>>> + # Test Case 3a, revoked by int CA in dbx
>>> + output = u_boot_console.run_command_list([
>>> + 'host bind 0 %s' % disk_img,
>>> + 'fatload host 0:1 4000000 dbx_b.auth',
>>> + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize dbx',
>>> + 'fatload host 0:1 4000000 db_c.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,$filesize PK'])
>>> + assert 'Failed to set EFI variable' not in ''.join(output)
>>> +
>>> + output = u_boot_console.run_command_list([
>>> + 'efidebug boot add 1 HELLO_abc host 0:1 /helloworld.efi.signed_abc ""',
>>> + 'efidebug boot next 1',
>>> + 'efidebug test bootmgr'])
>>> + assert 'Hello, world!' in ''.join(output)
>>> + # Or,
>>> + # assert '\'HELLO_abc\' failed' in ''.join(output)
>>> + # assert 'efi_start_image() returned: 26' in ''.join(output)
>>> +
>>> + with u_boot_console.log.section('Test Case 3b'):
>>> + # Test Case 3b, revoked by root CA in dbx
>>> + output = u_boot_console.run_command_list([
>>> + 'fatload host 0:1 4000000 dbx_c.auth',
>>> + 'setenv -e -nv -bs -rt -at -i 4000000,$filesize dbx',
>>> + 'efidebug boot next 1',
>>> + 'efidebug test bootmgr'])
>>> + assert '\'HELLO_abc\' failed' in ''.join(output)
>>> + assert 'efi_start_image() returned: 26' in ''.join(output)
>>>
>>