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test/py: avb2.0: add tests for avb commands

1. Run AVB 2.0 full verification chain, avb verify
2. Check if 'avb get_uuid' works, compare results with
'part list mmc 1' output
3. Test `avb read` commands, which reads N bytes from a partition
identified by a name

Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
tags/2020-06-01
Igor Opaniuk 2 years ago
committed by Tom Rini
parent
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# Copyright (c) 2018, Linaro Limited
#
# SPDX-License-Identifier: GPL-2.0+
#
# Android Verified Boot 2.0 Test

"""
This tests Android Verified Boot 2.0 support in U-boot:

For additional details about how to build proper vbmeta partition
check doc/README.avb2

For configuration verification:
- Corrupt boot partition and check for failure
- Corrupt vbmeta partition and check for failure
"""

import pytest
import u_boot_utils as util

# defauld mmc id
mmc_dev = 1
temp_addr = 0x90000000
temp_addr2 = 0x90002000

def test_avb_verify(u_boot_console):
"""Run AVB 2.0 boot verification chain with avb subset of commands
"""

success_str = "Verification passed successfully"

response = u_boot_console.run_command('avb init %s' %str(mmc_dev))
assert response == ''
response = u_boot_console.run_command('avb verify')
assert response.find(success_str)


def test_avb_mmc_uuid(u_boot_console):
"""Check if 'avb get_uuid' works, compare results with
'part list mmc 1' output
"""

response = u_boot_console.run_command('avb init %s' % str(mmc_dev))
assert response == ''

response = u_boot_console.run_command('mmc rescan; mmc dev %s' %
str(mmc_dev))
assert response.find('is current device')

part_lines = u_boot_console.run_command('mmc part').splitlines()
part_list = {}
cur_partname = ""

for line in part_lines:
if "\"" in line:
start_pt = line.find("\"")
end_pt = line.find("\"", start_pt + 1)
cur_partname = line[start_pt + 1: end_pt]

if "guid:" in line:
guid_to_check = line.split("guid:\t")
part_list[cur_partname] = guid_to_check[1]

# lets check all guids with avb get_guid
for part, guid in part_list.iteritems():
avb_guid_resp = u_boot_console.run_command('avb get_uuid %s' % part)
assert guid == avb_guid_resp.split("UUID: ")[1]


def test_avb_read_rb(u_boot_console):
"""Test reading rollback indexes
"""

response = u_boot_console.run_command('avb init %s' % str(mmc_dev))
assert response == ''

response = u_boot_console.run_command('avb read_rb 1')


def test_avb_is_unlocked(u_boot_console):
"""Test if device is in the unlocked state
"""

response = u_boot_console.run_command('avb init %s' % str(mmc_dev))
assert response == ''

response = u_boot_console.run_command('avb is_unlocked')


def test_avb_mmc_read(u_boot_console):
"""Test mmc read operation
"""

response = u_boot_console.run_command('mmc rescan; mmc dev %s 0' %
str(mmc_dev))
assert response.find('is current device')

response = u_boot_console.run_command('mmc read 0x%x 0x100 0x1' % temp_addr)
assert response.find('read: OK')

response = u_boot_console.run_command('avb init %s' % str(mmc_dev))
assert response == ''

response = u_boot_console.run_command('avb read_part xloader 0 100 0x%x' %
temp_addr2)
assert response.find('Read 512 bytes')

# Now lets compare two buffers
response = u_boot_console.run_command('cmp 0x%x 0x%x 40' %
(temp_addr, temp_addr2))
assert response.find('64 word')

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