mirror of
https://github.com/u-boot/u-boot.git
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3b7d26eb2b
According to UEFI v2.10 spec section 8.2.6, if a caller invokes the SetVariables() service, it will produce a digest from hash(VariableName, VendorGuid, Attributes, TimeStamp, DataNew_variable_content), then the firmware that implements the SetVariable() service will compare the digest with the result of applying the signer’s public key to the signature. For EFI variable append write, efitools sign-efi-sig-list has an option "-a" to add EFI_VARIABLE_APPEND_WRITE attr, and u-boot will drop this attribute in efi_set_variable_int(). So if a caller uses "sign-efi-sig-list -a" to create the authenticated variable, this append write will fail in the u-boot due to "hash check failed". This patch resumes writing the EFI_VARIABLE_APPEND_WRITE attr to ensure that the hash check is correct. And also update the "test_efi_secboot" test case to compliance with the change. Signed-off-by: Weizhao Ouyang <o451686892@gmail.com>
371 lines
18 KiB
Python
371 lines
18 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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#
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# U-Boot UEFI: Signed Image Authentication Test
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"""
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This test verifies image authentication for signed images.
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"""
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import pytest
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@pytest.mark.boardspec('sandbox')
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@pytest.mark.buildconfigspec('efi_secure_boot')
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@pytest.mark.buildconfigspec('cmd_efidebug')
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@pytest.mark.buildconfigspec('cmd_fat')
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@pytest.mark.buildconfigspec('cmd_nvedit_efi')
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@pytest.mark.slow
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class TestEfiSignedImage(object):
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def test_efi_signed_image_auth1(self, u_boot_console, efi_boot_env):
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"""
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Test Case 1 - Secure boot is not in force
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"""
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 1a'):
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# Test Case 1a, run signed image if no PK
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld.efi.signed -s ""',
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'efidebug boot order 1',
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'bootefi bootmgr'])
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assert 'Hello, world!' in ''.join(output)
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with u_boot_console.log.section('Test Case 1b'):
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# Test Case 1b, run unsigned image if no PK
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 2 HELLO2 host 0:1 /helloworld.efi -s ""',
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'efidebug boot order 2',
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'bootefi bootmgr'])
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assert 'Hello, world!' in ''.join(output)
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def test_efi_signed_image_auth2(self, u_boot_console, efi_boot_env):
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"""
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Test Case 2 - Secure boot is in force,
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authenticated by db (TEST_db certificate in db)
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"""
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 2a'):
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# Test Case 2a, db is not yet installed
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld.efi.signed -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert('\'HELLO1\' failed' in ''.join(output))
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assert('efi_bootmgr_load() returned: 26' in ''.join(output))
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 2 HELLO2 host 0:1 /helloworld.efi -s ""',
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'efidebug boot order 2',
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'efidebug test bootmgr'])
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assert '\'HELLO2\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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with u_boot_console.log.section('Test Case 2b'):
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# Test Case 2b, authenticated by db
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 2',
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'efidebug test bootmgr'])
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assert '\'HELLO2\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 1',
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'bootefi bootmgr'])
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assert 'Hello, world!' in ''.join(output)
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def test_efi_signed_image_auth3(self, u_boot_console, efi_boot_env):
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"""
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Test Case 3 - rejected by dbx (TEST_db certificate in dbx)
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"""
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 3a'):
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# Test Case 3a, rejected by dbx
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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with u_boot_console.log.section('Test Case 3b'):
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# Test Case 3b, rejected by dbx even if db allows
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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def test_efi_signed_image_auth4(self, u_boot_console, efi_boot_env):
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"""
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Test Case 4 - revoked by dbx (digest of TEST_db certificate in dbx)
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"""
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 4'):
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# Test Case 4, rejected by dbx
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 dbx_hash.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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def test_efi_signed_image_auth5(self, u_boot_console, efi_boot_env):
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"""
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Test Case 5 - multiple signatures
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one signed with TEST_db, and
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one signed with TEST_db1
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"""
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 5a'):
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# Test Case 5a, authenticated even if only one of signatures
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# is verified
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert 'Hello, world!' in ''.join(output)
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with u_boot_console.log.section('Test Case 5b'):
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# Test Case 5b, authenticated if both signatures are verified
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db2.auth',
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'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert 'Hello, world!' in ''.join(output)
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with u_boot_console.log.section('Test Case 5c'):
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# Test Case 5c, rejected if one of signatures (digest of
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# certificate) is revoked
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 dbx_hash.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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with u_boot_console.log.section('Test Case 5d'):
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# Test Case 5d, rejected if both of signatures are revoked
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 dbx_hash2.auth',
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'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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# Try rejection in reverse order.
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u_boot_console.restart_uboot()
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with u_boot_console.log.section('Test Case 5e'):
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# Test Case 5e, authenticated even if only one of signatures
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# is verified. Same as before but reject dbx_hash1.auth only
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'fatload host 0:1 4000000 db2.auth',
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'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db',
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'fatload host 0:1 4000000 dbx_hash1.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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def test_efi_signed_image_auth6(self, u_boot_console, efi_boot_env):
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"""
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Test Case 6 - using digest of signed image in database
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"""
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 6a'):
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# Test Case 6a, verified by image's digest in db
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 db_hello_signed.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed -s ""',
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'efidebug boot order 1',
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'bootefi bootmgr'])
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assert 'Hello, world!' in ''.join(output)
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with u_boot_console.log.section('Test Case 6b'):
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# Test Case 6b, rejected by TEST_db certificate in dbx
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 dbx_db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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with u_boot_console.log.section('Test Case 6c'):
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# Test Case 6c, rejected by image's digest in dbx
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 dbx_hello_signed.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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def test_efi_signed_image_auth7(self, u_boot_console, efi_boot_env):
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"""
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Test Case 7 - Reject images based on the sha384/512 of their x509 cert
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"""
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# sha384 of an x509 cert in dbx
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 7a'):
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'fatload host 0:1 4000000 db2.auth',
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'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db',
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'fatload host 0:1 4000000 dbx_hash384.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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# sha512 of an x509 cert in dbx
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u_boot_console.restart_uboot()
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with u_boot_console.log.section('Test Case 7b'):
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'fatload host 0:1 4000000 db2.auth',
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'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db',
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'fatload host 0:1 4000000 dbx_hash512.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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output = u_boot_console.run_command_list([
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'efidebug boot add -b 1 HELLO host 0:1 /helloworld.efi.signed_2sigs -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert '\'HELLO\' failed' in ''.join(output)
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assert 'efi_bootmgr_load() returned: 26' in ''.join(output)
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def test_efi_signed_image_auth8(self, u_boot_console, efi_boot_env):
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"""
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Test Case 8 - Secure boot is in force,
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Same as Test Case 2 but the image binary to be loaded
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was willfully modified (forged)
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Must be rejected.
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"""
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u_boot_console.restart_uboot()
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disk_img = efi_boot_env
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with u_boot_console.log.section('Test Case 8a'):
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# Test Case 8a, Secure boot is not yet forced
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output = u_boot_console.run_command_list([
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'host bind 0 %s' % disk_img,
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'efidebug boot add -b 1 HELLO1 host 0:1 /helloworld_forged.efi.signed -s ""',
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'efidebug boot order 1',
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'efidebug test bootmgr'])
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assert('hELLO, world!' in ''.join(output))
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with u_boot_console.log.section('Test Case 8b'):
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# Test Case 8b, Install signature database and verify the image
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'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 order 1',
|
|
'efidebug test bootmgr'])
|
|
assert(not 'hELLO, world!' in ''.join(output))
|
|
assert('\'HELLO1\' failed' in ''.join(output))
|
|
assert('efi_bootmgr_load() returned: 26' in ''.join(output))
|