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tools/mpremote: Allow .img for ROMFS file and validate ROMFS image.

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Currently the tool allows writing an invalid ROMFS image, with a bad header
or images smaller than minimum size, and only checks the image extension.

This commit allows deploying a ROMFS with either a ".img" or ".romfs"
extension (in the future support may be added for other extensions that
have different semantics, eg a manifest), and validates the image header
before writing.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
This commit is contained in:
iabdalkader 2025-03-29 10:11:38 +01:00 committed by Damien George
parent 74a5bf94c1
commit 9e9be83fd6
1 changed files with 7 additions and 2 deletions
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9
tools/mpremote/mpremote/commands.py
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@ -9,7 +9,7 @@ import serial.tools.list_ports
from .transport import TransportError, TransportExecError, stdout_write_bytes
from .transport_serial import SerialTransport
from .romfs import make_romfs
from .romfs import make_romfs, VfsRomWriter
class CommandError(Exception):
@ -555,7 +555,7 @@ def _do_romfs_deploy(state, args):
romfs_filename = args.path
# Read in or create the ROMFS filesystem image.
if romfs_filename.endswith(".romfs"):
if os.path.isfile(romfs_filename) and romfs_filename.endswith((".img", ".romfs")):
with open(romfs_filename, "rb") as f:
romfs = f.read()
else:
@ -581,6 +581,11 @@ def _do_romfs_deploy(state, args):
rom_size = transport.eval("len(dev)")
print(f"ROMFS{rom_id} partition has size {rom_size} bytes")
# Check if ROMFS image is valid
if not romfs.startswith(VfsRomWriter.ROMFS_HEADER):
print("Invalid ROMFS image")
sys.exit(1)
# Check if ROMFS filesystem image will fit in the target partition.
if len(romfs) > rom_size:
print("ROMFS image is too big for the target partition")