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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>
281 lines
13 KiB
Python
281 lines
13 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: Variable Authentication Test
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"""
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This test verifies variable authentication
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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_fat')
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@pytest.mark.buildconfigspec('cmd_nvedit_efi')
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@pytest.mark.slow
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class TestEfiAuthVar(object):
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def test_efi_var_auth1(self, u_boot_console, efi_boot_env):
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"""
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Test Case 1 - Install signature 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 1a'):
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# Test Case 1a, Initial secure state
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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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'printenv -e SecureBoot'])
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assert '00000000: 00' in ''.join(output)
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output = u_boot_console.run_command(
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'printenv -e SetupMode')
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assert '00000000: 01' in output
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with u_boot_console.log.section('Test Case 1b'):
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# Test Case 1b, PK without AUTHENTICATED_WRITE_ACCESS
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -i 4000000:$filesize PK'])
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assert 'Failed to set EFI variable' in ''.join(output)
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with u_boot_console.log.section('Test Case 1c'):
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# Test Case 1c, install PK
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'printenv -e -n PK'])
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assert 'PK:' in ''.join(output)
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output = u_boot_console.run_command(
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'printenv -e SecureBoot')
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assert '00000000: 01' in output
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output = u_boot_console.run_command(
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'printenv -e SetupMode')
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assert '00000000: 00' in output
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with u_boot_console.log.section('Test Case 1d'):
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# Test Case 1d, db/dbx without KEK
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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:$filesize db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' in ''.join(output)
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with u_boot_console.log.section('Test Case 1e'):
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# Test Case 1e, install KEK
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -i 4000000:$filesize KEK'])
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assert 'Failed to set EFI variable' in ''.join(output)
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'printenv -e -n KEK'])
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assert 'KEK:' in ''.join(output)
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output = u_boot_console.run_command(
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'printenv -e SecureBoot')
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assert '00000000: 01' in output
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with u_boot_console.log.section('Test Case 1f'):
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# Test Case 1f, install 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 -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'db:' in ''.join(output)
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output = u_boot_console.run_command(
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'printenv -e SecureBoot')
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assert '00000000: 01' in output
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with u_boot_console.log.section('Test Case 1g'):
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# Test Case 1g, install dbx
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 dbx.auth',
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'setenv -e -nv -bs -rt -i 4000000:$filesize dbx'])
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assert 'Failed to set EFI variable' in ''.join(output)
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 dbx.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize dbx',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f dbx'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'dbx:' in ''.join(output)
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output = u_boot_console.run_command(
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'printenv -e SecureBoot')
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assert '00000000: 01' in output
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def test_efi_var_auth2(self, u_boot_console, efi_boot_env):
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"""
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Test Case 2 - Update database by overwriting
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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, update without AUTHENTICATED_WRITE_ACCESS
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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 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'db:' in ''.join(output)
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db1.auth',
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'setenv -e -nv -bs -rt -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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with u_boot_console.log.section('Test Case 2b'):
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# Test Case 2b, update without correct signature
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.esl',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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with u_boot_console.log.section('Test Case 2c'):
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# Test Case 2c, update with correct signature
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db1.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'db:' in ''.join(output)
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def test_efi_var_auth3(self, u_boot_console, efi_boot_env):
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"""
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Test Case 3 - Append 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 3a'):
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# Test Case 3a, update without AUTHENTICATED_WRITE_ACCESS
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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 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'db:' in ''.join(output)
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db2.auth',
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'setenv -e -nv -bs -rt -a -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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with u_boot_console.log.section('Test Case 3b'):
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# Test Case 3b, update without correct signature
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db.esl',
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'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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with u_boot_console.log.section('Test Case 3c'):
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# Test Case 3c, update with correct signature
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 db2.auth',
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'setenv -e -nv -bs -rt -at -a -i 4000000:$filesize db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'db:' in ''.join(output)
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def test_efi_var_auth4(self, u_boot_console, efi_boot_env):
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"""
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Test Case 4 - Delete database without authentication
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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 4a'):
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# Test Case 4a, update without AUTHENTICATED_WRITE_ACCESS
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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 PK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'fatload host 0:1 4000000 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'db:' in ''.join(output)
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output = u_boot_console.run_command_list([
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'setenv -e -nv -bs -rt db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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assert 'db:' in ''.join(output)
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with u_boot_console.log.section('Test Case 4b'):
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# Test Case 4b, update without correct signature/data
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output = u_boot_console.run_command_list([
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'setenv -e -nv -bs -rt -at db',
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'printenv -e -n -guid d719b2cb-3d3a-4596-a3bc-dad00e67656f db'])
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assert 'Failed to set EFI variable' in ''.join(output)
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assert 'db:' in ''.join(output)
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def test_efi_var_auth5(self, u_boot_console, efi_boot_env):
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"""
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Test Case 5 - Uninstall(delete) PK
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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, Uninstall PK without correct signature
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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 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 KEK.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize KEK',
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'fatload host 0:1 4000000 db.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize db',
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'printenv -e -n PK'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert 'PK:' in ''.join(output)
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 PK_null.esl',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'printenv -e -n PK'])
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assert 'Failed to set EFI variable' in ''.join(output)
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assert 'PK:' in ''.join(output)
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with u_boot_console.log.section('Test Case 5b'):
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# Test Case 5b, Uninstall PK with correct signature
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output = u_boot_console.run_command_list([
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'fatload host 0:1 4000000 PK_null.auth',
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'setenv -e -nv -bs -rt -at -i 4000000:$filesize PK',
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'printenv -e -n PK'])
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assert 'Failed to set EFI variable' not in ''.join(output)
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assert '\"PK\" not defined' in ''.join(output)
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output = u_boot_console.run_command(
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'printenv -e SecureBoot')
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assert '00000000: 00' in output
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output = u_boot_console.run_command(
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'printenv -e SetupMode')
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assert '00000000: 01' in output
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