mirror of https://github.com/ARMmbed/mbed-os.git
Remove old binary signing scripts of TF-M 1.1
Vikas Katariya
Lingkai Dong
parent
8648e4f4d6
commit
308ffe9e89
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@ -1,18 +0,0 @@
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# Copyright 2017 Linaro Limited
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# This file is intentionally empty.
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#
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# The __init__.py files are required to make Python treat the directories as
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# containing packages.
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@ -1,79 +0,0 @@
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# Copyright (c) 2019, Arm Limited.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import sys
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import cbor
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# SW component IDs
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SW_COMPONENT_RANGE = 0
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SW_COMPONENT_TYPE = SW_COMPONENT_RANGE + 1
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MEASUREMENT_VALUE = SW_COMPONENT_RANGE + 2
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SW_COMPONENT_VERSION = SW_COMPONENT_RANGE + 4
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SIGNER_ID = SW_COMPONENT_RANGE + 5
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MEASUREMENT_DESCRIPTION = SW_COMPONENT_RANGE + 6
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def create_sw_component_data(sw_type, sw_version, sw_measurement_type,
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sw_measurement_value, sw_signer_id):
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# List of SW component claims (key ID + value)
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key_value_list = [
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SW_COMPONENT_TYPE, sw_type,
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SW_COMPONENT_VERSION, sw_version,
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SIGNER_ID, sw_signer_id,
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MEASUREMENT_DESCRIPTION, sw_measurement_type,
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MEASUREMENT_VALUE, sw_measurement_value
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]
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# The measurement value should be the last item (key + value) in the list
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# to make it easier to modify its value later in the bootloader.
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# A dictionary would be the best suited data structure to store these
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# key-value pairs (claims), however dictionaries are not sorted, but for
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# example the lists do keep to order of items which we care about now.
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# An ordered dictionary could be used instead, but it would be converted
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# to a dict before the encoding and this conversion may not keep the order
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# of the items.
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if (len(key_value_list) % 2) != 0:
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print('Error: The length of the sw component claim list must '
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'be even (key + value).', file=sys.stderr)
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sys.exit(1)
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else:
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claim_number = (int)(len(key_value_list) / 2)
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# The output of this function must be a CBOR encoded map (dictionary) of
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# the SW component claims. The CBOR representation of an array and a map
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# (dictionary) is quite similar. To convert the encoded list to a map, it
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# is enough to modify the first byte (CBOR data item header) of the
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# data. This applies up to 23 items (11 claims in this case) - until the 5
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# lower bits of the item header are used as an item count specifier.
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if claim_number > 11:
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print('Error: There are more than 11 claims in the '
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'list of sw component claims.', file=sys.stderr)
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sys.exit(1)
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record_array = bytearray(cbor.dumps(key_value_list))
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# Modify the CBOR data item header (from array to map)
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# 7..5 bits : Major type
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# Array - 0x80
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# Map - 0xA0
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# 4..0 bits : Number of items
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record_array[0] = 0xA0 + claim_number
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return bytes(record_array)
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@ -1,267 +0,0 @@
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# Copyright 2017 Linaro Limited
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# Copyright (c) 2018-2019, Arm Limited.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""
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Image signing and management.
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"""
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from . import version as versmod
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from . import boot_record as br
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import hashlib
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import struct
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IMAGE_MAGIC = 0x96f3b83d
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IMAGE_HEADER_SIZE = 32
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TLV_HEADER_SIZE = 4
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PAYLOAD_DIGEST_SIZE = 32 # SHA256 hash
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KEYHASH_SIZE = 32
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DEP_IMAGES_KEY = "images"
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DEP_VERSIONS_KEY = "versions"
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# Image header flags.
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IMAGE_F = {
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'PIC': 0x0000001,
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'NON_BOOTABLE': 0x0000010,
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'RAM_LOAD': 0x0000020, }
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TLV_VALUES = {
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'KEYHASH': 0x01,
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'KEY' : 0x02,
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'SHA256' : 0x10,
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'RSA2048': 0x20,
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'RSA3072': 0x23,
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'DEPENDENCY': 0x40,
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'SEC_CNT': 0x50,
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'BOOT_RECORD': 0x60, }
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TLV_INFO_SIZE = 4
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TLV_INFO_MAGIC = 0x6907
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TLV_PROT_INFO_MAGIC = 0x6908
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# Sizes of the image trailer, depending on flash write size.
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trailer_sizes = {
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write_size: 128 * 3 * write_size + 8 * 2 + 16
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for write_size in [1, 2, 4, 8]
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}
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boot_magic = bytearray([
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0x77, 0xc2, 0x95, 0xf3,
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0x60, 0xd2, 0xef, 0x7f,
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0x35, 0x52, 0x50, 0x0f,
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0x2c, 0xb6, 0x79, 0x80, ])
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class TLV():
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def __init__(self, magic=TLV_INFO_MAGIC):
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self.magic = magic
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self.buf = bytearray()
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def __len__(self):
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return TLV_INFO_SIZE + len(self.buf)
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def add(self, kind, payload):
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"""
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Add a TLV record. Kind should be a string found in TLV_VALUES above.
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"""
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buf = struct.pack('<BBH', TLV_VALUES[kind], 0, len(payload))
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self.buf += buf
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self.buf += payload
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def get(self):
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if len(self.buf) == 0:
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return bytes()
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header = struct.pack('<HH', self.magic, len(self))
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return header + bytes(self.buf)
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class Image():
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@classmethod
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def load(cls, path, included_header=False, **kwargs):
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"""Load an image from a given file"""
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with open(path, 'rb') as f:
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payload = f.read()
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obj = cls(**kwargs)
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obj.payload = payload
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# Add the image header if needed.
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if not included_header and obj.header_size > 0:
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obj.payload = (b'\000' * obj.header_size) + obj.payload
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obj.check()
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return obj
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def __init__(self, version, header_size=IMAGE_HEADER_SIZE, security_cnt=0,
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pad=0):
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self.version = version
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self.header_size = header_size or IMAGE_HEADER_SIZE
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self.security_cnt = security_cnt
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self.pad = pad
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def __repr__(self):
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return "<Image version={}, header_size={}, security_counter={}, \
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pad={}, payloadlen=0x{:x}>".format(
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self.version,
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self.header_size,
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self.security_cnt,
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self.pad,
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len(self.payload))
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def save(self, path):
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with open(path, 'wb') as f:
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f.write(self.payload)
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def check(self):
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"""Perform some sanity checking of the image."""
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# If there is a header requested, make sure that the image
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# starts with all zeros.
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if self.header_size > 0:
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if any(v != 0 and v != b'\000' for v in self.payload[0:self.header_size]):
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raise Exception("Padding requested, but image does not start with zeros")
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def sign(self, sw_type, key, ramLoadAddress, dependencies=None):
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image_version = (str(self.version.major) + '.'
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+ str(self.version.minor) + '.'
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+ str(self.version.revision))
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# Calculate the hash of the public key
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if key is not None:
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pub = key.get_public_bytes()
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sha = hashlib.sha256()
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sha.update(pub)
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pubbytes = sha.digest()
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else:
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pubbytes = bytes(KEYHASH_SIZE)
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# The image hash is computed over the image header, the image itself
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# and the protected TLV area. However, the boot record TLV (which is
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# part of the protected area) should contain this hash before it is
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# even calculated. For this reason the script fills this field with
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# zeros and the bootloader will insert the right value later.
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image_hash = bytes(PAYLOAD_DIGEST_SIZE)
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# Create CBOR encoded boot record
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boot_record = br.create_sw_component_data(sw_type, image_version,
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"SHA256", image_hash,
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pubbytes)
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# Mandatory protected TLV area: TLV info header
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# + security counter TLV
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# + boot record TLV
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# Size of the security counter TLV: header ('BBH') + payload ('I')
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# = 8 Bytes
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protected_tlv_size = TLV_INFO_SIZE + 8 + TLV_HEADER_SIZE \
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+ len(boot_record)
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if dependencies is None:
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dependencies_num = 0
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else:
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# Size of a dependency TLV:
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# header ('BBH') + payload('IBBHI') = 16 Bytes
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dependencies_num = len(dependencies[DEP_IMAGES_KEY])
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protected_tlv_size += (dependencies_num * 16)
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# At this point the image is already on the payload, this adds
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# the header to the payload as well
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self.add_header(key, protected_tlv_size, ramLoadAddress)
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prot_tlv = TLV(TLV_PROT_INFO_MAGIC)
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# Protected TLVs must be added first, because they are also included
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# in the hash calculation
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payload = struct.pack('I', self.security_cnt)
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prot_tlv.add('SEC_CNT', payload)
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prot_tlv.add('BOOT_RECORD', boot_record)
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if dependencies_num != 0:
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for i in range(dependencies_num):
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payload = struct.pack(
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'<'+'B3x'+'BBHI',
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int(dependencies[DEP_IMAGES_KEY][i]),
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dependencies[DEP_VERSIONS_KEY][i].major,
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dependencies[DEP_VERSIONS_KEY][i].minor,
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dependencies[DEP_VERSIONS_KEY][i].revision,
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dependencies[DEP_VERSIONS_KEY][i].build
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)
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prot_tlv.add('DEPENDENCY', payload)
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self.payload += prot_tlv.get()
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sha = hashlib.sha256()
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sha.update(self.payload)
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image_hash = sha.digest()
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tlv = TLV()
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tlv.add('SHA256', image_hash)
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if key is not None:
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if key.get_public_key_format() == 'hash':
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tlv.add('KEYHASH', pubbytes)
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else:
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tlv.add('KEY', pub)
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sig = key.sign(self.payload)
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tlv.add(key.sig_tlv(), sig)
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self.payload += tlv.get()
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def add_header(self, key, protected_tlv_size, ramLoadAddress):
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"""Install the image header.
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The key is needed to know the type of signature, and
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approximate the size of the signature."""
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flags = 0
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if ramLoadAddress is not None:
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# add the load address flag to the header to indicate that an SRAM
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# load address macro has been defined
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flags |= IMAGE_F["RAM_LOAD"]
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fmt = ('<' +
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# type ImageHdr struct {
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'I' + # Magic uint32
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'I' + # LoadAddr uint32
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'H' + # HdrSz uint16
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'H' + # PTLVSz uint16
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'I' + # ImgSz uint32
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'I' + # Flags uint32
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'BBHI' + # Vers ImageVersion
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'I' # Pad1 uint32
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) # }
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assert struct.calcsize(fmt) == IMAGE_HEADER_SIZE
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header = struct.pack(fmt,
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IMAGE_MAGIC,
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0 if (ramLoadAddress is None) else ramLoadAddress, # LoadAddr
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self.header_size,
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protected_tlv_size, # TLV info header + Protected TLVs
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len(self.payload) - self.header_size, # ImageSz
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flags,
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self.version.major,
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self.version.minor or 0,
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self.version.revision or 0,
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self.version.build or 0,
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0) # Pad1
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self.payload = bytearray(self.payload)
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self.payload[:len(header)] = header
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def pad_to(self, size, align):
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"""Pad the image to the given size, with the given flash alignment."""
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tsize = trailer_sizes[align]
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padding = size - (len(self.payload) + tsize)
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if padding < 0:
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msg = "Image size (0x{:x}) + trailer (0x{:x}) exceeds requested size 0x{:x}".format(
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len(self.payload), tsize, size)
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raise Exception(msg)
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pbytes = b'\xff' * padding
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pbytes += b'\xff' * (tsize - len(boot_magic))
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pbytes += boot_magic
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self.payload += pbytes
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@ -1,137 +0,0 @@
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#!/usr/bin/env python3
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# Copyright (c) 2017,2019 Linaro Limited.
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# Copyright (c) 2017-2019, Arm Limited.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
|
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# distributed under the License is distributed on an "AS IS" BASIS,
|
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
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# See the License for the specific language governing permissions and
|
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# limitations under the License.
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"""
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Cryptographic key management for imgtool.
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"""
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from __future__ import print_function
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from cryptography.hazmat.backends import default_backend
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from cryptography.hazmat.primitives import serialization
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from cryptography.hazmat.primitives.hashes import SHA256
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from cryptography.hazmat.primitives.asymmetric import rsa
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from cryptography.hazmat.primitives.asymmetric.padding import PSS, PKCS1v15
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from cryptography.hazmat.primitives.asymmetric.padding import MGF1
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import hashlib
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from pyasn1.type import namedtype, univ
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from pyasn1.codec.der.encoder import encode
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# Sizes that bootutil will recognize
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RSA_KEY_SIZES = [2048, 3072]
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# Public exponent
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PUBLIC_EXPONENT = 65537
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# By default, we use RSA-PSS (PKCS 2.1). That can be overridden on
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# the command line to support the older (less secure) PKCS1.5
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sign_rsa_pss = True
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AUTOGEN_MESSAGE = "/* Autogenerated by imgtool.py, do not edit. */"
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class RSAUsageError(Exception):
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pass
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class RSAutil():
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def __init__(self, key, public_key_format='hash'):
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"""Construct an RSA key with the given key data"""
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self.key = key
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self.public_key_format = public_key_format
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def key_size(self):
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return self.key.key_size
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def get_public_key_format(self):
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return self.public_key_format
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@staticmethod
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def generate(key_size=2048):
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if key_size not in RSA_KEY_SIZES:
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raise RSAUsageError("Key size {} is not supported by MCUboot"
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.format(key_size))
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return RSAutil(rsa.generate_private_key(
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public_exponent=PUBLIC_EXPONENT,
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key_size=key_size,
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backend=default_backend()))
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def export_private(self, path):
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with open(path, 'wb') as f:
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f.write(self.key.private_bytes(
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encoding=serialization.Encoding.PEM,
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format=serialization.PrivateFormat.TraditionalOpenSSL,
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encryption_algorithm=serialization.NoEncryption()))
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def get_public_bytes(self):
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return self.key.public_key().public_bytes(
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encoding=serialization.Encoding.DER,
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format=serialization.PublicFormat.PKCS1)
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def emit_c(self):
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print(AUTOGEN_MESSAGE)
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print("const unsigned char rsa_pub_key[] = {", end='')
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encoded = self.get_public_bytes()
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for count, b in enumerate(encoded):
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if count % 8 == 0:
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print("\n\t", end='')
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else:
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print(" ", end='')
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print("0x{:02x},".format(b), end='')
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print("\n};")
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print("const unsigned int rsa_pub_key_len = {};".format(len(encoded)))
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def sig_type(self):
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"""Return the type of this signature (as a string)"""
|
||||
if sign_rsa_pss:
|
||||
return "PKCS1_PSS_RSA{}_SHA256".format(self.key_size())
|
||||
else:
|
||||
return "PKCS15_RSA{}_SHA256".format(self.key_size())
|
||||
|
||||
def sig_len(self):
|
||||
return 256 if self.key_size() == 2048 else 384
|
||||
|
||||
def sig_tlv(self):
|
||||
return "RSA2048" if self.key_size() == 2048 else "RSA3072"
|
||||
|
||||
def sign(self, payload):
|
||||
if sign_rsa_pss:
|
||||
signature = self.key.sign(
|
||||
data=payload,
|
||||
padding=PSS(
|
||||
mgf=MGF1(SHA256()),
|
||||
salt_length=32
|
||||
),
|
||||
algorithm=SHA256()
|
||||
)
|
||||
else:
|
||||
signature = self.key.sign(
|
||||
data=payload,
|
||||
padding=PKCS1v15(),
|
||||
algorithm=SHA256()
|
||||
)
|
||||
assert len(signature) == self.sig_len()
|
||||
return signature
|
||||
|
||||
def load(path, public_key_format='hash'):
|
||||
with open(path, 'rb') as f:
|
||||
pem = f.read()
|
||||
try:
|
||||
key = serialization.load_pem_private_key(
|
||||
pem,
|
||||
password=None,
|
||||
backend=default_backend()
|
||||
)
|
||||
return RSAutil(key, public_key_format)
|
||||
except ValueError:
|
||||
raise Exception("Unsupported RSA key file")
|
||||
|
|
@ -1,66 +0,0 @@
|
|||
# Copyright 2017 Linaro Limited
|
||||
# Copyright (c) 2018, Arm Limited.
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
"""
|
||||
Semi Semantic Versioning
|
||||
|
||||
Implements a subset of semantic versioning that is supportable by the image header.
|
||||
"""
|
||||
|
||||
import argparse
|
||||
from collections import namedtuple
|
||||
import re
|
||||
|
||||
SemiSemVersion = namedtuple('SemiSemVersion', ['major', 'minor', 'revision', 'build'])
|
||||
|
||||
def increment_build_num(lastVer):
|
||||
newVer = SemiSemVersion(lastVer.major, lastVer.minor, lastVer.revision, lastVer.build + 1)
|
||||
return newVer
|
||||
|
||||
# -1 if a is older than b; 0 if they're the same version; 1 if a is newer than b
|
||||
def compare(a, b):
|
||||
if (a.major > b.major): return 1
|
||||
elif (a.major < b.major): return -1
|
||||
else:
|
||||
if (a.minor > b.minor): return 1
|
||||
elif (a.minor < b.minor): return -1
|
||||
else:
|
||||
if (a.revision > b.revision): return 1
|
||||
elif (a.revision < b.revision): return -1
|
||||
else:
|
||||
if (a.build > b.build): return 1
|
||||
elif (a.build < b.build): return -1
|
||||
else: return 0
|
||||
|
||||
version_re = re.compile(r"""^([1-9]\d*|0)(\.([1-9]\d*|0)(\.([1-9]\d*|0)(\+([1-9]\d*|0))?)?)?$""")
|
||||
def decode_version(text):
|
||||
"""Decode the version string, which should be of the form maj.min.rev+build"""
|
||||
m = version_re.match(text)
|
||||
if m:
|
||||
result = SemiSemVersion(
|
||||
int(m.group(1)) if m.group(1) else 0,
|
||||
int(m.group(3)) if m.group(3) else 0,
|
||||
int(m.group(5)) if m.group(5) else 0,
|
||||
int(m.group(7)) if m.group(7) else 0)
|
||||
return result
|
||||
else:
|
||||
msg = "Invalid version number, should be maj.min.rev+build with later parts optional"
|
||||
raise argparse.ArgumentTypeError(msg)
|
||||
|
||||
if __name__ == '__main__':
|
||||
print(decode_version("1.2"))
|
||||
print(decode_version("1.0"))
|
||||
print(decode_version("0.0.2+75"))
|
||||
print(decode_version("0.0.0+00"))
|
||||
Loading…
Reference in New Issue