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image: add additional fields to Netgear encrypted image

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These fields are used for EAX12 and EX6250v2 series, and perhaps other
devices. Compatibility is preserved with the WAX202 and WAX206.

In addition, adds the related vars to DEVICE_VARS so that the variables
work correctly with multiple devices.

References in GPL source:
https://www.downloads.netgear.com/files/GPL/EAX12_EAX11v2_EAX15v2_GPL_V1.0.3.34_src.tar.gz

* tools/imgencoder/src/gj_enc.c
  Contains code that generates the encrypted image.

Signed-off-by: Wenli Looi <wlooi@ucalgary.ca>
This commit is contained in:
Wenli Looi
2023-03-30 22:27:11 +00:00
committed by Hauke Mehrtens
parent b20be1e41e
commit 0a1ebccc87
4 changed files with 26 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
scripts/netgear-encrypted-factory.py
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@@ -14,6 +14,8 @@ def main():
parser.add_argument('--model', type=str, required=True)
parser.add_argument('--region', type=str, required=True)
parser.add_argument('--version', type=str, required=True)
parser.add_argument('--hw-id-list', type=str)
parser.add_argument('--model-list', type=str)
parser.add_argument('--encryption-block-size', type=str, required=True)
parser.add_argument('--openssl-bin', type=str, required=True)
parser.add_argument('--key', type=str, required=True)
@@ -26,6 +28,10 @@ def main():
assert (encryption_block_size > 0 and encryption_block_size % 16 ==
0), 'Encryption block size must be a multiple of the AES block size (16)'
hw_id_list = args.hw_id_list.split(';') if args.hw_id_list else []
model_list = args.model_list.split(';') if args.model_list else []
hw_info = ';'.join(hw_id_list + model_list)
image = open(args.input_file, 'rb').read()
image_enc = []
for i in range(0, len(image), encryption_block_size):
@@ -45,13 +51,18 @@ def main():
image_enc = b''.join(image_enc)
image_with_header = struct.pack(
'>32s32s64s64s64s256s12sII',
'>32s32s64s64sIBBB13s200s100s12sII',
args.model.encode('ascii'),
args.region.encode('ascii'),
args.version.encode('ascii'),
b'Thu Jan 1 00:00:00 1970', # static date for reproducibility
0, # product hw model
0, # model index
len(hw_id_list),
len(model_list),
b'', # reserved
hw_info.encode('ascii'),
b'', # reserved
b'', # RSA signature - omitted for now
b'encrpted_img',
len(image_enc),
encryption_block_size,