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# SPDX-License-Identifier: GPL-3.0+
# Copyright (C) 2020 nlscc
import argparse
import os
import base64
import xml.etree.ElementTree as ET
from clint.textui import progress
from . import request
from . import crypt
from . import fusclient
from . import versionfetch
def main():
parser = argparse.ArgumentParser(description="Download and query firmware for Samsung devices.")
parser.add_argument("-m", "--dev-model", help="device region code", required=True)
parser.add_argument("-r", "--dev-region", help="device model", required=True)
subparsers = parser.add_subparsers(dest="command")
dload = subparsers.add_parser("download", help="download a firmware")
dload.add_argument("-v", "--fw-ver", help="firmware version to download", required=True)
dload.add_argument("-R", "--resume", help="resume an unfinished download", action="store_true")
dload.add_argument("-M", "--show-md5", help="print the expected MD5 hash of the downloaded file", action="store_true")
dload_out = dload.add_mutually_exclusive_group(required=True)
dload_out.add_argument("-O", "--out-dir", help="output the server filename to the specified directory")
dload_out.add_argument("-o", "--out-file", help="output to the specified file")
chkupd = subparsers.add_parser("checkupdate", help="check for the latest available firmware version")
decrypt = subparsers.add_parser("decrypt", help="decrypt an encrypted firmware")
decrypt.add_argument("-v", "--fw-ver", help="encrypted firmware version", required=True)
decrypt.add_argument("-V", "--enc-ver", type=int, choices=[2, 4], default=4, help="encryption version (default 4)")
decrypt.add_argument("-i", "--in-file", help="encrypted firmware file input", required=True)
decrypt.add_argument("-o", "--out-file", help="decrypted firmware file output", required=True)
args = parser.parse_args()
if args.command == "download":
client = fusclient.FUSClient()
path, filename, size = getbinaryfile(client, args.fw_ver, args.dev_model, args.dev_region)
print("resuming" if args.resume else "downloading", filename)
out = args.out_file if args.out_file else os.path.join(args.out_dir, filename)
dloffset = os.stat(out).st_size if args.resume else 0
if dloffset == size:
print("already downloaded!")
return
fd = open(out, "ab" if args.resume else "wb")
initdownload(client, filename)
r = client.downloadfile(path+filename, dloffset)
if args.show_md5 and "Content-MD5" in r.headers:
print("MD5:", base64.b64decode(r.headers["Content-MD5"]).hex())
# TODO: use own progress bar instead of clint
for chunk in progress.bar(r.iter_content(chunk_size=0x10000), expected_size=(size/0x10000)+1):
if chunk:
fd.write(chunk)
fd.flush()
fd.close()
elif args.command == "checkupdate":
print(versionfetch.getlatestver(args.dev_model, args.dev_region))
elif args.command == "decrypt":
getkey = crypt.getv4key if args.enc_ver == 4 else crypt.getv2key
key = getkey(args.fw_ver, args.dev_model, args.dev_region)
length = os.stat(args.in_file).st_size
with open(args.in_file, "rb") as inf:
with open(args.out_file, "wb") as outf:
crypt.decrypt_progress(inf, outf, key, length)
def initdownload(client, filename):
req = request.binaryinit(filename, client.nonce)
resp = client.makereq("NF_DownloadBinaryInitForMass.do", req)
def getbinaryfile(client, fw, model, region):
req = request.binaryinform(fw, model, region, client.nonce)
resp = client.makereq("NF_DownloadBinaryInform.do", req)
root = ET.fromstring(resp)
status = int(root.find("./FUSBody/Results/Status").text)
if status != 200:
raise Exception("DownloadBinaryInform returned {}, firmware could not be found?".format(status))
size = int(root.find("./FUSBody/Put/BINARY_BYTE_SIZE/Data").text)
filename = root.find("./FUSBody/Put/BINARY_NAME/Data").text
path = root.find("./FUSBody/Put/MODEL_PATH/Data").text
return path, filename, size
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