Decrypts a DBeaver pass

dbeaver-pass.py

#! /usr/bin/env python

import base64, binascii, sys

key = bytearray("sdf@!#$verf^wv%6Fwe%$$#FFGwfsdefwfe135s$^H)dg", "utf8")
def main():
	if len(sys.argv) < 2:
		print(f"usage: {sys.argv[0]} <password>", file = sys.stderr)
		sys.exit(1)

	password = sys.argv[1]
	print(f"Encrypted password: {password}")
	try:
		password = base64.b64decode(password)
	except binascii.Error as err:
		print(f"Invalid base64 password: {err}", file = sys.stderr)
		sys.exit(1)

	result = xor(password)

	if not (result[len(result) - 2] == 0x00 and result[len(result) - 1] == 0x81):
		print("Invalid encrypted password", file = sys.stderr)
		sys.exit(1)

	decrypted = result[:-2].decode()
	print(f"Decrypted password: {decrypted}")
	print()

def xor(plain):
	xored = bytearray()
	for i, b in enumerate(plain):
		if i >= len(key):
			xored.append(b ^ key[0])
		else:
			xored.append(b ^ key[i])

	return xored

main()