def write_sb(cpu_params: CpuParams, image_file_name: str, img: SecureBootV1) -> None:
"""Write SB image to the external flash
The method behaviour depends on TEST_IMG_CONTENT:
- if True (TEST MODE), the method generates the image and compare with previous version
- if False (PRODUCTION), the method generates the image and burn into FLASH
:param cpu_params: processor specific parameters of the test
:param image_file_name: of the image to be written (including file extension)
:param img: image instance to be written
"""
path = os.path.join(cpu_params.data_dir, OUTPUT_IMAGES_SUBDIR, image_file_name)
dbg_info = DebugInfo()
img_data = img.export(dbg_info=dbg_info,
# use the following parameters only for unit test
header_padding8=b'\xdb\x00\x76\x7a\xf4\x81\x0b\x86',
auth_padding=b'\x36\x72\xf4\x99\x92\x05\x34\xd2\xd5\x17\xa0\xf7')
write_dbg_log(cpu_params.data_dir, image_file_name, dbg_info.lines, TEST_IMG_CONTENT)
if TEST_IMG_CONTENT:
assert img.info() # quick check info prints non-empty output
compare_bin_files(path, img_data)
img = SecureBootV1.parse(b'0' + img_data, 1)
dbg_info2 = DebugInfo()
img_data2 = img.export(dbg_info=dbg_info2, header_padding8=b'\xdb\x00\x76\x7a\xf4\x81\x0b\x86',
auth_padding=b'\x36\x72\xf4\x99\x92\x05\x34\xd2\xd5\x17\xa0\xf7')
assert dbg_info.lines == dbg_info2.lines
assert img_data == img_data2
else:
with open(path, 'wb') as f:
f.write(img_data)
mboot = init_flashloader(cpu_params)
assert mboot.receive_sb_file(img_data)
mboot.close()
def test_sb_unsigned_otp(data_dir: str, subdir: str, image_name: str) -> None:
"""Test creation of SB file for RT5xx with unsigned image. SBKEK Key for SB file is stored in KEYSTORE.
:param data_dir: absolute path of the directory with data files for the test
:param image_name: file name of the unsigned image WITHOUT file extension
"""
write_shadow_regs(data_dir,
[
(0x40130194, 0x00000000), # BOOT_CFG[5]: USE_OTP = 0
# MASTER KEY - 000102030405060708090a0b0c0d0e0f00112233445566778899aabbccddeeff
(0x401301C0, 0xccddeeff),
(0x401301C4, 0x8899aabb),
(0x401301C8, 0x44556677),
(0x401301CC, 0x00112233),
(0x401301D0, 0x0c0d0e0f),
(0x401301D4, 0x08090a0b),
(0x401301D8, 0x04050607),
(0x401301DC, 0x00010203),
])
sbkek = KeyStore.derive_sb_kek_key(bytes.fromhex(MASTER_KEY))
adv_params = SBV2xAdvancedParams(dek=b'\xA0' * 32, mac=b'\x0B' * 32, nonce=bytes(16),
timestamp=datetime(2020, month=1, day=31))
# create SB file boot image
boot_image = BootImageV21(
kek=sbkek,
product_version='1.0.0', component_version='1.0.0', build_number=1,
# parameters fixed for test only (to have always same output), do not use in production
advanced_params=adv_params)
# certificate + private key
cert_block, priv_key_pem_data = create_cert_block(data_dir)
boot_image.cert_block = cert_block
boot_image.private_key_pem_data = priv_key_pem_data
fcb_data = load_binary(data_dir, FCB_FILE_NAME)
plain_image_data = load_binary(data_dir, subdir, image_name + '.bin')
# images are aligned for test purposes only, otherwise export will align with random data
fcb_data = align_block(fcb_data, 16)
plain_image_data = align_block(plain_image_data, 16)
# create boot section 0
boot_section = BootSectionV2(
0,
CmdFill(address=0x10C000, pattern=bytes.fromhex('063040C0')),
CmdMemEnable(0x10C000, 4, ExtMemId.FLEX_SPI_NOR),
CmdErase(address=0x8000000, length=0x00800),
CmdErase(address=0x8001000, length=0x10000),
CmdLoad(address=0x8000400, data=fcb_data),
CmdLoad(address=0x8001000, data=plain_image_data))
boot_image.add_boot_section(boot_section)
dbg_info = list() # debug log for analysis of the binary output content
sb_file = boot_image.export(padding=bytes(8), dbg_info=dbg_info) # padding for unit test only, to avoid random data
write_dbg_log(data_dir, image_name + '_otp.sb', dbg_info, TEST_IMG_CONTENT)
write_sb(data_dir, image_name + '_otp.sb', sb_file, KeyStore(KeySourceType.OTP))
def write_image(
cpu_params: CpuParams,
image_file_name: str,
img: BootImgRT,
otpmk_bee_regions: Tuple[BeeFacRegion, ...] = tuple(),
) -> None:
"""Write image to the external flash
The method behaviour depends on TEST_IMG_CONTENT:
- if True (TEST MODE), the method generates the image and compare with previous version
- if False (PRODUCTION), the method generates the image and burn into FLASH
:param cpu_params: processor specific parameters of the test
:param image_file_name: of the image to be written (including file extension)
:param img: image instance to be written
:param otpmk_bee_regions: optional list of BEE regions for BEE OTPMK encryption
"""
path = os.path.join(cpu_params.data_dir, OUTPUT_IMAGES_SUBDIR,
image_file_name)
debug_info = DebugInfo()
# use zulu datetime for test purposes only, to produce stable output; remove the parameter for production
zulu = datetime(year=2020,
month=4,
day=8,
hour=5,
minute=54,
second=33,
tzinfo=timezone.utc)
img_data = img.export(dbg_info=debug_info, zulu=zulu)
assert len(img_data) == img.size
write_dbg_log(cpu_params.data_dir, image_file_name, debug_info.lines,
TEST_IMG_CONTENT)
if TEST_IMG_CONTENT:
assert img.info() # quick check info prints non-empty output
compare_bin_files(path, img_data)
# compare no-padding
if (NO_PADDING and img.fcb.enabled and isinstance(img.fcb, PaddingFCB)
and not img.bee_encrypted):
img.fcb.enabled = False
compare_bin_files(path.replace(".bin", "_nopadding.bin"),
img.export(zulu=zulu))
img.fcb.enabled = False
# test that parse image will return same content
if img.fcb.enabled and not img.bee_encrypted:
compare_bin_files(path, BootImgRT.parse(img_data).export())
# test that size matches len of exported data
assert img.size == len(img_data)
else:
with open(path, "wb") as f:
f.write(img_data)
if (NO_PADDING and img.fcb.enabled and isinstance(img.fcb, PaddingFCB)
and not img.bee_encrypted):
with open(path.replace(".bin", "_nopadding.bin"), "wb") as f:
f.write(img_data[img.ivt_offset:])
if img.ivt_offset == BootImgRT.IVT_OFFSET_NOR_FLASH:
_burn_image_to_flash(cpu_params, img, img_data, otpmk_bee_regions)
else:
assert len(otpmk_bee_regions) == 0
_burn_image_to_sd(cpu_params, img, img_data)
def test_sb_unsigned_keystore(data_dir: str, subdir: str,
image_name: str) -> None:
"""Test creation of SB file for RT5xx with unsigned image. SBKEK Key for SB file is stored in KEYSTORE.
:param data_dir: absolute path of the directory with data files for the test
:param image_name: file name of the unsigned image WITHOUT file extension
"""
if not TEST_IMG_CONTENT:
write_shadow_regs(
data_dir, [(0x40130194, 0x00000080)]) # BOOT_CFG[5]: USE_PUF = 1
with open(os.path.join(data_dir, KEYSTORE_SUBDIR, 'SBkek_PUF.txt'),
'r') as f:
sbkek_str = f.readline()
adv_params = SBV2xAdvancedParams(dek=b'\xA0' * 32,
mac=b'\x0B' * 32,
nonce=bytes(16),
timestamp=datetime(2020, month=1, day=31))
# create boot image
boot_image = BootImageV21(
kek=bytes.fromhex(sbkek_str),
product_version='1.0.0',
component_version='1.0.0',
build_number=1,
# parameters fixed for test only (to have always same output), do not use in production
advanced_params=adv_params)
# certificate + private key
cert_block, priv_key_pem_data = create_cert_block(data_dir)
boot_image.cert_block = cert_block
boot_image.private_key_pem_data = priv_key_pem_data
fcb_data = load_binary(data_dir, FCB_FILE_NAME)
plain_image_data = load_binary(data_dir, subdir, image_name + '.bin')
# images are aligned for test purposes only, otherwise export will align with random data
fcb_data = align_block(fcb_data, 16)
plain_image_data = align_block(plain_image_data, 16)
# create boot section 0
boot_section = BootSectionV2(
0, CmdFill(address=0x10C000, pattern=bytes.fromhex('063040C0')),
CmdMemEnable(0x10C000, 4, ExtMemId.FLEX_SPI_NOR),
CmdErase(address=0x8000000, length=0x10000),
CmdLoad(address=0x8000400, data=fcb_data),
CmdLoad(address=0x8001000, data=plain_image_data))
boot_image.add_boot_section(boot_section)
dbg_info = list() # debug log for analysis of the binary output content
sb_file = boot_image.export(
padding=bytes(8),
dbg_info=dbg_info) # padding for unit test only, to avoid random data
write_dbg_log(data_dir, image_name + '_keystore.sb', dbg_info,
TEST_IMG_CONTENT)
write_sb(data_dir, image_name + '_keystore.sb', sb_file,
get_keystore(data_dir))
def test_sb_otfad_keystore(data_dir: str, subdir: str, image_name: str,
secure: bool) -> None:
"""Test creation of SB file for RT5xx with OTFAD encrypted image. SBKEK Key for SB file is stored in KEYSTORE.
:param data_dir: absolute path of the directory with data files for the test
:param image_name: file name of the signed image WITHOUT file extension
:param secure: whether security should be enabled
"""
if not TEST_IMG_CONTENT:
secure_boot_en = 0x900000 if secure else 0 # BOOT_CFG[0]: SECURE_BOOT_EN=?
write_shadow_regis(
data_dir,
[
(0x40130194, 0x00000080), # BOOT_CFG[5]: USE_PUF = 1
(0x401301A8, 0x00001000), # OTFAD CFG
(0x40130180, 0x00000010 +
secure_boot_en), # BOOT_CFG[0]: DEFAULT_ISP = 1(USB)
],
)
with open(os.path.join(data_dir, KEYSTORE_SUBDIR, "SBkek_PUF.txt"),
"r") as f:
sbkek_str = f.readline()
key_store = get_keystore(data_dir)
adv_params = SBV2xAdvancedParams(
dek=b"\xA0" * 32,
mac=b"\x0B" * 32,
nonce=bytes(16),
timestamp=datetime(2020, month=1, day=31, hour=0, tzinfo=timezone.utc),
)
# create SB file boot image
boot_image = BootImageV21(
kek=bytes.fromhex(sbkek_str),
product_version="1.0.0",
component_version="1.0.0",
build_number=1,
# parameters fixed for test only (to have always same output), do not use in production
advanced_params=adv_params,
flags=0x0008,
)
# certificate + private key
cert_block, priv_key_pem_data = create_cert_block(data_dir)
boot_image.cert_block = cert_block
boot_image.private_key_pem_data = priv_key_pem_data
fcb_data = load_binary(data_dir, FCB_FILE_NAME)
plain_image_data = load_binary(data_dir, subdir, image_name + ".bin")
# images are aligned for test purposes only, otherwise export will align with random data
fcb_data = align_block(fcb_data, 16)
plain_image_data = align_block(plain_image_data, 16)
otfad = Otfad()
# keys used to encrypt image, for RT5xx always define 4 key blobs!!
key = bytes.fromhex("B1A0C56AF31E98CD6936A79D9E6F829D")
counter = bytes.fromhex("5689fab8b4bfb264")
otfad.add_key_blob(
KeyBlob(0x8001000,
0x80FFFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
# to use random keys: otfad.add_key_blob(KeyBlob(0x8001000, 0x80FFFFF))
otfad.add_key_blob(
KeyBlob(0x8FFD000,
0x8FFDFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
otfad.add_key_blob(
KeyBlob(0x8FFE000,
0x8FFEFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
otfad.add_key_blob(
KeyBlob(0x8FFF000,
0x8FFFFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
encr_image_data = otfad.encrypt_image(plain_image_data, 0x8001000, False)
with open(os.path.join(data_dir, KEYSTORE_SUBDIR, "OTFADKek_PUF.txt"),
"r") as f:
otfad_kek = f.readline()
# create boot section 0
boot_section = BootSectionV2(
0,
# configure external FLASH
CmdFill(address=0x10C000, pattern=int("063040C0", 16)),
CmdMemEnable(0x10C000, 4, ExtMemId.FLEX_SPI_NOR),
# erase the FLASH
CmdErase(address=0x8000000, length=0x10000),
# load key blobs allowing th decrypt the image
CmdLoad(address=0x8000000,
data=otfad.encrypt_key_blobs(kek=otfad_kek)),
# load FCB data
CmdLoad(address=0x8000400, data=fcb_data),
# load key-store
CmdLoad(address=0x8000800, data=key_store.export()),
# load encrypted image
CmdLoad(address=0x8001000, data=encr_image_data),
)
boot_image.add_boot_section(boot_section)
dbg_info = list() # debug log for analysis of the binary output content
sb_file = boot_image.export(
padding=bytes(8),
dbg_info=dbg_info) # padding for unit test only, to avoid random data
write_dbg_log(data_dir, image_name + "_otfad_keystore.sb", dbg_info,
TEST_IMG_CONTENT)
write_sb(data_dir, image_name + "_otfad_keystore.sb", sb_file, key_store)
def test_sb_otfad_otp(data_dir: str, subdir: str, image_name: str,
secure: bool) -> None:
"""Test creation of SB file for RT5xx with OTFAD encrypted image.
SBKEK Key for SB file is derived from master key in OTP.
:param data_dir: absolute path of the directory with data files for the test
:param image_name: file name of the signed image WITHOUT file extension
:param secure: whether security should be enabled
"""
if not TEST_IMG_CONTENT:
secure_boot_en = 0x900000 if secure else 0 # BOOT_CFG[0]: SECURE_BOOT_EN=?
write_shadow_regis(
data_dir,
[
(0x401301A8, 0x00001000), # OTFAD CFG
# OTFAD KEY INPUT - 12aaaaaabb34bbbbcccc56ccdddddd78
(0x401301B0, 0xAAAAAA12),
(0x401301B4, 0xBBBB34BB),
(0x401301B8, 0xCC56CCCC),
(0x401301BC, 0x78DDDDDD),
],
)
write_shadow_regis(
data_dir,
[
# MASTER KEY - 000102030405060708090a0b0c0d0e0f00112233445566778899aabbccddeeff
(0x401301C0, 0xCCDDEEFF),
(0x401301C4, 0x8899AABB),
(0x401301C8, 0x44556677),
(0x401301CC, 0x00112233),
(0x401301D0, 0x0C0D0E0F),
(0x401301D4, 0x08090A0B),
(0x401301D8, 0x04050607),
(0x401301DC, 0x00010203),
# BOOT_CFG[0]: DEFAULT_ISP = 1(USB)
(0x40130180, 0x00000010 + secure_boot_en),
],
)
sbkek = KeyStore.derive_sb_kek_key(bytes.fromhex(MASTER_KEY))
otfad_kek = KeyStore.derive_otfad_kek_key(
bytes.fromhex(MASTER_KEY),
bytes.fromhex("12aaaaaabb34bbbbcccc56ccdddddd78"))
key_store = get_keystore(data_dir)
adv_params = SBV2xAdvancedParams(
dek=b"\xA0" * 32,
mac=b"\x0B" * 32,
nonce=bytes(16),
timestamp=datetime(2020, month=1, day=31, hour=0, tzinfo=timezone.utc),
)
# create SB file boot image
boot_image = BootImageV21(
kek=sbkek,
product_version="1.0.0",
component_version="1.0.0",
build_number=1,
# parameters fixed for test only (to have always same output), do not use in production
advanced_params=adv_params,
flags=0x0008,
)
# certificate + private key
cert_block, priv_key_pem_data = create_cert_block(data_dir)
boot_image.cert_block = cert_block
boot_image.private_key_pem_data = priv_key_pem_data
fcb_data = load_binary(data_dir, FCB_FILE_NAME)
plain_image_data = load_binary(data_dir, subdir, image_name + ".bin")
# images are aligned for test purposes only, otherwise export will align with random data
fcb_data = align_block(fcb_data, 16)
plain_image_data = align_block(plain_image_data, 16)
otfad = Otfad()
# keys used to encrypt image, for RT5xx always define 4 key blobs!!
key = bytes.fromhex("B1A0C56AF31E98CD6936A79D9E6F829D")
counter = bytes.fromhex("5689fab8b4bfb264")
otfad.add_key_blob(
KeyBlob(0x8001000,
0x80FFFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
# to use random keys: otfad.add_key_blob(KeyBlob(0x8001000, 0x80FFFFF))
otfad.add_key_blob(
KeyBlob(0x8FFD000,
0x8FFDFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
otfad.add_key_blob(
KeyBlob(0x8FFE000,
0x8FFEFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
otfad.add_key_blob(
KeyBlob(0x8FFF000,
0x8FFFFFF,
key,
counter,
zero_fill=bytes(4),
crc=bytes(
4))) # zero_fill and crc should be used only for testing !
encr_image_data = otfad.encrypt_image(plain_image_data, 0x8001000, False)
# create boot section 0
boot_section = BootSectionV2(
0,
# configure external FLASH
CmdFill(address=0x10C000, pattern=int("063040C0", 16)),
CmdMemEnable(0x10C000, 4, ExtMemId.FLEX_SPI_NOR),
# erase the FLASH
CmdErase(address=0x8000000, length=0x10000),
# load key blobs allowing th decrypt the image
CmdLoad(address=0x8000000,
data=otfad.encrypt_key_blobs(kek=otfad_kek)),
# load FCB data
CmdLoad(address=0x8000400, data=fcb_data),
# load key-store
CmdLoad(address=0x8000800, data=key_store.export()),
# load encrypted image
CmdLoad(address=0x8001000, data=encr_image_data),
)
boot_image.add_boot_section(boot_section)
dbg_info = list() # debug log for analysis of the binary output content
sb_file = boot_image.export(
padding=bytes(8),
dbg_info=dbg_info) # padding for unit test only, to avoid random data
write_dbg_log(data_dir, image_name + "_otfad_otp.sb", dbg_info,
TEST_IMG_CONTENT)
write_sb(data_dir, image_name + "_otfad_otp.sb", sb_file, key_store)
