87 lines
3.2 KiB
Python
Executable File
87 lines
3.2 KiB
Python
Executable File
#!/usr/bin/python3
|
|
# SPDX-License-Identifier: GPL-2.0-or-later
|
|
#
|
|
# Copyright (C) 2022 Luiz Angelo Daros de Luca <luizluca@gmail.com>
|
|
#
|
|
# Cameo Image header geneator, used by some D-Link DGS-1210 switches
|
|
# and APRESIA ApresiaLightGS series
|
|
#
|
|
import argparse
|
|
import pathlib
|
|
import socket
|
|
import struct
|
|
|
|
MODEL_LEN = 20
|
|
SIGNATURE_LEN = 16
|
|
LINUXLOAD_LEN = 10
|
|
BUFSIZE = 4096
|
|
|
|
parser = argparse.ArgumentParser(description='Generate Cameo firmware header.')
|
|
parser.add_argument('source_file', type=argparse.FileType('rb'))
|
|
parser.add_argument('dest_file', type=argparse.FileType('wb'))
|
|
parser.add_argument('model')
|
|
parser.add_argument('signature')
|
|
parser.add_argument('partition', type=int, choices=range(0,10),
|
|
metavar="partition=[0-9]",help="partition id")
|
|
parser.add_argument('customer_signature', type=int, choices=range(0,10),
|
|
metavar="customer_signature=[0-9]",
|
|
help="customer signature")
|
|
parser.add_argument('board_version', type=int, choices=range(0,2**32),
|
|
metavar="board_version=[0-4294967295]",
|
|
help="board version")
|
|
parser.add_argument('linux_loadaddr', nargs='?',
|
|
help="Kernel start address in 0xFFFFFFFF format")
|
|
args = parser.parse_args()
|
|
|
|
if len(args.model) > MODEL_LEN:
|
|
raise ValueError(f"Model '{args.model}' is greater than {MODEL_LEN} bytes")
|
|
|
|
if len(args.signature) > SIGNATURE_LEN:
|
|
raise ValueError(f"Signature '{args.signature}' is greater than"
|
|
f"{SIGNATURE_LEN} bytes")
|
|
|
|
if args.signature == "os":
|
|
if args.linux_loadaddr:
|
|
if len(args.linux_loadaddr) > LINUXLOAD_LEN:
|
|
raise ValueError(f"linux_loadaddr '{args.linux_loadaddr}' is greater"
|
|
f"than {LINUXLOAD_LEN} bytes")
|
|
if (args.linux_loadaddr[0:2] != "0x"):
|
|
raise ValueError(f"linux_loadaddr '{args.linux_loadaddr}' must use"
|
|
f"the 0x789ABCDE format")
|
|
int(args.linux_loadaddr[2:],16)
|
|
else:
|
|
raise ValueError(f"linux_loadaddr is required for signature 'os'")
|
|
else:
|
|
args.linux_loadaddr = ""
|
|
|
|
checksum = 0
|
|
size = 0
|
|
while True:
|
|
buf = args.source_file.read(BUFSIZE)
|
|
if not buf:
|
|
break
|
|
checksum = sum(iter(buf),checksum) % (1<<32)
|
|
size += len(buf)
|
|
|
|
args.dest_file.write(struct.pack('!I', checksum))
|
|
args.dest_file.write(struct.pack(f'{MODEL_LEN}s',
|
|
args.model.encode("ascii")))
|
|
args.dest_file.write(struct.pack(f'{SIGNATURE_LEN}s',
|
|
args.signature.encode("ascii")))
|
|
args.dest_file.write(struct.pack('!B', args.partition))
|
|
args.dest_file.write(struct.pack('!B', 0x40)) # ??? This header size?
|
|
args.dest_file.write(struct.pack('!B', 0x00)) # ??? Encrypted?
|
|
args.dest_file.write(struct.pack('!B', args.customer_signature))
|
|
args.dest_file.write(struct.pack('!I', args.board_version))
|
|
args.dest_file.write(struct.pack('!I', size))
|
|
args.dest_file.write(struct.pack(f'{LINUXLOAD_LEN}s',
|
|
args.linux_loadaddr.encode("ascii")))
|
|
args.dest_file.write(struct.pack('!2x'))
|
|
|
|
args.source_file.seek(0)
|
|
while True:
|
|
buf = args.source_file.read(BUFSIZE)
|
|
if not buf:
|
|
break
|
|
args.dest_file.write(buf)
|