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executable file 50 lines (40 sloc) 1.5 KB
#!/usr/bin/env python3
import hashlib
import base64
from Cryptodome.Cipher import AES
import argparse
import sys
def main():
parser = argparse.ArgumentParser(description="Decrypt mRemoteNG passwords.")
group = parser.add_mutually_exclusive_group()
group.add_argument("-f", "--file", help="name of file containing mRemoteNG password")
group.add_argument("-s", "--string", help="base64 string of mRemoteNG password")
parser.add_argument("-p", "--password", help="Custom password", default="mR3m")
if len(sys.argv) < 2:
parser.print_help(sys.stderr)
sys.exit(1)
args = parser.parse_args()
encrypted_data = ""
if args.file != None:
with open(args.file) as f:
encrypted_data = f.read()
encrypted_data = encrypted_data.strip()
encrypted_data = base64.b64decode(encrypted_data)
elif args.string != None:
encrypted_data = args.string
encrypted_data = base64.b64decode(encrypted_data)
else:
print("Please use either the file (-f, --file) or string (-s, --string) flag")
sys.exit(1)
salt = encrypted_data[:16]
associated_data = encrypted_data[:16]
nonce = encrypted_data[16:32]
ciphertext = encrypted_data[32:-16]
tag = encrypted_data[-16:]
key = hashlib.pbkdf2_hmac("sha1", args.password.encode(), salt, 1000, dklen=32)
cipher = AES.new(key, AES.MODE_GCM, nonce=nonce)
cipher.update(associated_data)
plaintext = cipher.decrypt_and_verify(ciphertext, tag)
print("Password: {}".format(plaintext.decode("utf-8")))
if __name__ == "__main__":
main()
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