尝试用大佬的解包打包脚本对保存下来的cfg文件进行解包，总是提示语法错误，毫无经验不知道错在哪，有了解的大佬吗
完整的打包/解包脚本已准备就绪：
#!/usr/bin/env python3
import os
import subprocess
import shlex
import sys
import argparse
import tarfile
import io
unobfuscated_key = bytes.fromhex(
'65676a796f646c746a6870646b67746b6832333470363536376c613230666c760000000000000000000000000000000000000000000000000000000000000000'
)
hardcoded_iv = bytes.fromhex(
'36613730363436633639363637373634'
)
dot_encrypt_data = bytes.fromhex(
'2e0ce09b5d412c36430bed8fb61af11b8834877351293fceedb55e812b9e8daa81e0c617117de5b87c93b505200c9b20'
)
iv_size = 0x10
key_size = 0x20
def aes_decrypt(key, iv, payload):
cmd = f"openssl enc -d -aes-256-cbc -K {key[:key_size].hex()} -iv {iv.hex()}"
proc = subprocess.Popen(shlex.split(cmd),
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = proc.communicate(payload)
return out
def aes_encrypt(key, iv, payload):
cmd = f"openssl enc -e -aes-256-cbc -K {key[:key_size].hex()} -iv {iv.hex()}"
proc = subprocess.Popen(shlex.split(cmd),
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
out, err = proc.communicate(payload)
return out
def decrypt_config(input, output):
with open(input, 'rb') as f:
file_size = os.fstat(f.fileno()).st_size
payload = f.read(file_size - iv_size)
iv = f.read(iv_size)
unwrapped_key = aes_decrypt(key=unobfuscated_key, iv=hardcoded_iv, payload=dot_encrypt_data)
decrypted_payload = aes_decrypt(key=unwrapped_key, iv=iv, payload=payload)
decrypted_payload_io = io.BytesIO(decrypted_payload)
tar = tarfile.open(fileobj=decrypted_payload_io)
tar.extractall(path=output)
print(f"decrypted: {len(decrypted_payload)} bytes")
print(f"done: written output to {output}")
def encrypt_config(input, output):
with open(input + os.path.sep + 'backup_md5', 'wb') as f:
# firmware has a bug where it doesn't actually generate or check real md5.
f.write(bytes("d41d8cd98f00b204e9800998ecf8427e -\n", 'utf-8'))
encrypted_payload_io = io.BytesIO()
tar = tarfile.open(fileobj=encrypted_payload_io, mode='w:gz')
for filename in os.listdir(input):
full_path = os.path.join(input, filename)
tar.add(full_path, arcname=filename)
tar.close()
unwrapped_key = aes_decrypt(key=unobfuscated_key, iv=hardcoded_iv, payload=dot_encrypt_data)
encrypted_payload = aes_encrypt(key=unwrapped_key, iv=hardcoded_iv, payload=encrypted_payload_io.getbuffer())
with open(output, "wb") as f:
f.write(encrypted_payload)
f.write(hardcoded_iv)
print(f"encrypted: {len(encrypted_payload)} bytes")
print(f"done: written output to {output}")
parser = argparse.ArgumentParser()
parser.add_argument('-c', '--command', choices=['encrypt', 'decrypt'], default='decrypt')
parser.add_argument('-i', '--input', required=True)
parser.add_argument('-o', '--output', required=False)
args = parser.parse_args()
match args.command:
case 'encrypt':
input = os.path.realpath(args.input)
if not os.path.exists(input) or os.path.isfile(input):
print(f"{input} doesn't exist or is not a directory")
sys.exit(1)
encrypt_config(input, args.output or input + '.cfg')
case 'decrypt':
input = os.path.realpath(args.input)
if not os.path.isfile(input):
print(f"{input} doesn't exist or is not a file")
sys.exit(1)
decrypt_config(input, args.output or os.path.splitext(input)[0])
解密：
python3 cr1000_config.py -i <path to .cfg>
加密：
python3 cr1000_config.py -c encrypt -i <path to config directory> |
楼主: ra13u
310112100042806
发表于 2023-9-15 22:17
