navicat密码解密

'''
pip install cryptography
'''

from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.primitives import padding
from cryptography.hazmat.backends import default_backend
import binascii
 
aes_key = b'libcckeylibcckey'
aes_iv = b'libcciv libcciv '
 
# 加密
def encrypt(string):
    backend = default_backend()
    cipher = Cipher(algorithms.AES(aes_key), modes.CBC(aes_iv), backend=backend)
    encryptor = cipher.encryptor()
 
    padder = padding.PKCS7(algorithms.AES.block_size).padder()
    padded_data = padder.update(string.encode()) + padder.finalize()
 
    result = encryptor.update(padded_data) + encryptor.finalize()
    return binascii.hexlify(result).upper().decode()
 
# 解密
def decrypt(upper_string):
    backend = default_backend()
    cipher = Cipher(algorithms.AES(aes_key), modes.CBC(aes_iv), backend=backend)
    decryptor = cipher.decryptor()
 
    encrypted_data = binascii.unhexlify(upper_string.lower())
    decrypted_padded_data = decryptor.update(encrypted_data) + decryptor.finalize()
 
    unpadder = padding.PKCS7(algorithms.AES.block_size).unpadder()
    try:
        data = unpadder.update(decrypted_padded_data) + unpadder.finalize()
    except ValueError as e:
        print("Decryption error: Invalid padding bytes.")
        raise e
 
    return data.decode()
 
if __name__ == '__main__':
    print(decrypt('导出的密文'))