mirror of
https://github.com/brain-hackers/u-boot-brain
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7fdc02b3d7
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>
158 lines
7.7 KiB
Python
158 lines
7.7 KiB
Python
# SPDX-License-Identifier: GPL-2.0+
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# Copyright (c) 2019, Linaro Limited
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# Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
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import os
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import os.path
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from subprocess import call, check_call, check_output, CalledProcessError
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import pytest
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from defs import *
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# from test/py/conftest.py
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def tool_is_in_path(tool):
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for path in os.environ["PATH"].split(os.pathsep):
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full_path = os.path.join(path, tool)
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if os.path.isfile(full_path) and os.access(full_path, os.X_OK):
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return True
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return False
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#
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# Fixture for UEFI secure boot test
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#
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@pytest.fixture(scope='session')
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def efi_boot_env(request, u_boot_config):
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"""Set up a file system to be used in UEFI secure boot test.
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Args:
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request: Pytest request object.
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u_boot_config: U-boot configuration.
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Return:
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A path to disk image to be used for testing
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"""
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global HELLO_PATH
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image_path = u_boot_config.persistent_data_dir
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image_path = image_path + '/' + EFI_SECBOOT_IMAGE_NAME
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image_size = EFI_SECBOOT_IMAGE_SIZE
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part_size = EFI_SECBOOT_PART_SIZE
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fs_type = EFI_SECBOOT_FS_TYPE
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if HELLO_PATH == '':
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HELLO_PATH = u_boot_config.build_dir + '/lib/efi_loader/helloworld.efi'
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try:
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mnt_point = u_boot_config.persistent_data_dir + '/mnt_efisecure'
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check_call('mkdir -p {}'.format(mnt_point), shell=True)
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# create a disk/partition
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check_call('dd if=/dev/zero of=%s bs=1MiB count=%d'
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% (image_path, image_size), shell=True)
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check_call('sgdisk %s -n 1:0:+%dMiB'
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% (image_path, part_size), shell=True)
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# create a file system
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check_call('dd if=/dev/zero of=%s.tmp bs=1MiB count=%d'
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% (image_path, part_size), shell=True)
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check_call('mkfs -t %s %s.tmp' % (fs_type, image_path), shell=True)
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check_call('dd if=%s.tmp of=%s bs=1MiB seek=1 count=%d conv=notrunc'
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% (image_path, image_path, 1), shell=True)
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check_call('rm %s.tmp' % image_path, shell=True)
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loop_dev = check_output('sudo losetup -o 1MiB --sizelimit %dMiB --show -f %s | tr -d "\n"'
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% (part_size, image_path), shell=True).decode()
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check_output('sudo mount -t %s -o umask=000 %s %s'
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% (fs_type, loop_dev, mnt_point), shell=True)
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# suffix
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# *.key: RSA private key in PEM
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# *.crt: X509 certificate (self-signed) in PEM
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# *.esl: signature list
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# *.hash: message digest of image as signature list
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# *.auth: signed signature list in signature database format
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# *.efi: UEFI image
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# *.efi.signed: signed UEFI image
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# Create signature database
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# PK
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check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_PK/ -keyout PK.key -out PK.crt -nodes -days 365'
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% mnt_point, shell=True)
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check_call('cd %s; %scert-to-efi-sig-list -g %s PK.crt PK.esl; %ssign-efi-sig-list -t "2020-04-01" -c PK.crt -k PK.key PK PK.esl PK.auth'
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% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
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shell=True)
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# PK_null for deletion
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check_call('cd %s; touch PK_null.esl; %ssign-efi-sig-list -t "2020-04-02" -c PK.crt -k PK.key PK PK_null.esl PK_null.auth'
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% (mnt_point, EFITOOLS_PATH), shell=True)
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# KEK
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check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_KEK/ -keyout KEK.key -out KEK.crt -nodes -days 365'
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% mnt_point, shell=True)
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check_call('cd %s; %scert-to-efi-sig-list -g %s KEK.crt KEK.esl; %ssign-efi-sig-list -t "2020-04-03" -c PK.crt -k PK.key KEK KEK.esl KEK.auth'
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% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
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shell=True)
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# db
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check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_db/ -keyout db.key -out db.crt -nodes -days 365'
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% mnt_point, shell=True)
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check_call('cd %s; %scert-to-efi-sig-list -g %s db.crt db.esl; %ssign-efi-sig-list -t "2020-04-04" -c KEK.crt -k KEK.key db db.esl db.auth'
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% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
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shell=True)
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# db1
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check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_db1/ -keyout db1.key -out db1.crt -nodes -days 365'
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% mnt_point, shell=True)
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check_call('cd %s; %scert-to-efi-sig-list -g %s db1.crt db1.esl; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key db db1.esl db1.auth'
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% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
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shell=True)
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# db1-update
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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'
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% (mnt_point, EFITOOLS_PATH), shell=True)
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## dbx (TEST_dbx certificate)
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check_call('cd %s; openssl req -x509 -sha256 -newkey rsa:2048 -subj /CN=TEST_dbx/ -keyout dbx.key -out dbx.crt -nodes -days 365'
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% mnt_point, shell=True)
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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'
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% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
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shell=True)
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## dbx_hash (digest of TEST_db certificate)
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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'
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% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
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shell=True)
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## dbx_hash1 (digest of TEST_db1 certificate)
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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'
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% (mnt_point, EFITOOLS_PATH, GUID, EFITOOLS_PATH),
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shell=True)
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## dbx_db (with TEST_db certificate)
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check_call('cd %s; %ssign-efi-sig-list -t "2020-04-05" -c KEK.crt -k KEK.key dbx db.esl dbx_db.auth'
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% (mnt_point, EFITOOLS_PATH),
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shell=True)
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# Copy image
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check_call('cp %s %s' % (HELLO_PATH, mnt_point), shell=True)
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# Sign image
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check_call('cd %s; sbsign --key db.key --cert db.crt helloworld.efi'
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% mnt_point, shell=True)
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## Sign already-signed image with another key
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check_call('cd %s; sbsign --key db1.key --cert db1.crt --output helloworld.efi.signed_2sigs helloworld.efi.signed'
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% mnt_point, shell=True)
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## Digest image
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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'
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% (mnt_point, EFITOOLS_PATH, EFITOOLS_PATH),
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shell=True)
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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'
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% (mnt_point, EFITOOLS_PATH, EFITOOLS_PATH),
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shell=True)
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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'
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% (mnt_point, EFITOOLS_PATH),
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shell=True)
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check_call('sudo umount %s' % loop_dev, shell=True)
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check_call('sudo losetup -d %s' % loop_dev, shell=True)
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except CalledProcessError as exception:
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pytest.skip('Setup failed: %s' % exception.cmd)
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return
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else:
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yield image_path
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finally:
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call('rm -f %s' % image_path, shell=True)
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