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https://github.com/projectacrn/acrn-hypervisor.git
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8b16be9185
Many of the license and Intel copyright headers include the "All rights reserved" string. It is not relevant in the context of the BSD-3-Clause license that the code is released under. This patch removes those strings throughout the code (hypervisor, devicemodel and misc). Tracked-On: #7254 Signed-off-by: Geoffroy Van Cutsem <geoffroy.vancutsem@intel.com>
52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
# Copyright (C) 2021 Intel Corporation.
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#
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# SPDX-License-Identifier: BSD-3-Clause
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#
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import ctypes
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import logging
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import inspectorlib.cdata as cdata
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from acpiparser._utils import TableHeader
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def tpm2_optional_data(data_len):
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start_method_data_len = 0
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has_log_area = False
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if data_len <= 12:
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start_method_data_len = data_len
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elif data_len == 24:
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start_method_data_len = 12
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has_log_area = True
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else:
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start_method_data_len = 12
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logging.debug(f"TPM2 data length: {data_len + 52} is greater than 64 bytes but less than 76 bytes.")
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logging.debug(f"The TPM2 data is still processed but the 65 to {data_len + 52} bytes are discard.")
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return start_method_data_len, has_log_area
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def tpm2_factory(start_method_data_len, has_log_area):
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class TPM2(cdata.Struct):
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_pack_ = 1
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_fields_ = [
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('header', TableHeader),
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('platform_class', ctypes.c_uint16),
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('reserved', ctypes.c_uint16),
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('address_of_control_area', ctypes.c_uint64),
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('start_method', ctypes.c_uint32),
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('start_method_specific_parameters', ctypes.c_ubyte * start_method_data_len),
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] + ([
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('log_area_minimum_length', ctypes.c_uint32),
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('log_area_start_address', ctypes.c_uint64),
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] if has_log_area else [])
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return TPM2
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def TPM2(val):
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"""Create class based on decode of a TPM2 table from filename."""
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if isinstance(val, str):
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base_length = 52
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data = open(val, mode='rb').read()
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start_method_data_len, has_log_area = tpm2_optional_data(len(data) - base_length)
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return tpm2_factory(start_method_data_len, has_log_area).from_buffer_copy(data)
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elif isinstance(val, bytearray):
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return tpm2_factory(12, True).from_buffer(val) if len(val) > 64 else tpm2_factory(12, False).from_buffer(val)
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