mirror of
https://git.proxmox.com/git/fwupd
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72 lines
2.2 KiB
Python
Executable File
72 lines
2.2 KiB
Python
Executable File
#!/usr/bin/python3
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#
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# Copyright (C) 2019 Richard Hughes <richard@hughsie.com>
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#
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# SPDX-License-Identifier: LGPL-2.1+
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import sys
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import uuid
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import argparse
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import struct
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CAPSULE_FLAGS_PERSIST_ACROSS_RESET = 0x00010000
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CAPSULE_FLAGS_POPULATE_SYSTEM_TABLE = 0x00020000
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CAPSULE_FLAGS_INITIATE_RESET = 0x00040000
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def main(args):
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# parse GUID from command line
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try:
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guid = uuid.UUID(args.guid)
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except ValueError as e:
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print(e)
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return 1
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try:
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with open(args.bin, 'rb') as f:
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bin_data = f.read()
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except FileNotFoundError as e:
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print(e)
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return 1
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# check if already has header
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hdrsz = struct.calcsize('<16sIII')
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if len(bin_data) >= hdrsz:
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hdr = struct.unpack('<16sIII', bin_data[:hdrsz])
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imgsz = hdr[3]
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if imgsz == len(bin_data):
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print('Replacing existing CAPSULE_HEADER of:')
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guid_mixed = uuid.UUID(bytes_le=hdr[0])
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hdrsz_old = hdr[1]
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flags = hdr[2]
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print('GUID: %s' % guid_mixed)
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print('HdrSz: 0x%04x' % hdrsz_old)
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print('Flags: 0x%04x' % flags)
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print('PayloadSz: 0x%04x' % imgsz)
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bin_data = bin_data[hdrsz_old:]
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# set header flags
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flags = CAPSULE_FLAGS_PERSIST_ACROSS_RESET | CAPSULE_FLAGS_INITIATE_RESET
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if args.flags:
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flags = int(args.flags, 16)
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# build update capsule header
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imgsz = hdrsz + len(bin_data)
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hdr = struct.pack('<16sIII', guid.bytes_le, hdrsz, flags, imgsz)
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with open(args.cap, 'wb') as f:
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f.write(hdr + bin_data)
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print('Wrote capsule %s' % args.cap)
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print('GUID: %s' % guid)
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print('HdrSz: 0x%04x' % hdrsz)
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print('Flags: 0x%04x' % flags)
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print('PayloadSz: 0x%04x' % imgsz)
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return 0
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parser = argparse.ArgumentParser(description='Add capsule header on firmware')
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parser.add_argument('--guid', help='GUID of the device', required=True)
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parser.add_argument('--bin', help='Path to the .bin file', required=True)
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parser.add_argument('--cap', help='Output capsule file path', required=True)
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parser.add_argument('--flags', help='Flags, e.g. 0x40000', default=None)
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args = parser.parse_args()
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sys.exit(main(args))
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