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'))

　　

以上为python版本，还有java版本如下：

在线运行java

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.security.MessageDigest;
import java.util.Arrays;
 
public class NavicatPassword {
    public static void main(String[] args) throws Exception {
        NavicatPassword navicatPassword = new NavicatPassword();
 
        // 11版本及以前的密码，填写在""中，本例以11的密码为例
        //String decode = navicatPassword.decrypt("CE3AAB73CBBE383C", 11);
 
        // 12版本及以后的密码，填写在""中
        String decode = navicatPassword.decrypt("加密后的密码", 12);

        System.out.println(decode);
    }

 
    private static final String AES_KEY = "libcckeylibcckey";
    private static final String AES_IV = "libcciv libcciv ";
    private static final String BLOW_KEY = "3DC5CA39";
    private static final String BLOW_IV = "d9c7c3c8870d64bd";
 
    public static String encrypt(String plaintext, int version) throws Exception {
        switch (version) {
            case 11:
                return encryptEleven(plaintext);
            case 12:
                return encryptTwelve(plaintext);
            default:
                throw new IllegalArgumentException("Unsupported version");
        }
    }
 
    public static String decrypt(String ciphertext, int version) throws Exception {
        switch (version) {
            case 11:
                return decryptEleven(ciphertext);
            case 12:
                return decryptTwelve(ciphertext);
            default:
                throw new IllegalArgumentException("Unsupported version");
        }
    }
 
    private static String encryptEleven(String plaintext) throws Exception {
        byte[] iv = hexStringToByteArray(BLOW_IV);
        byte[] key = hashToBytes(BLOW_KEY);
 
        int round = plaintext.length() / 8;
        int leftLength = plaintext.length() % 8;
        StringBuilder result = new StringBuilder();
        byte[] currentVector = iv.clone();
 
        Cipher cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");
        SecretKeySpec secretKeySpec = new SecretKeySpec(key, "Blowfish");
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);
 
        for (int i = 0; i < round; i++) {
            byte[] block = xorBytes(plaintext.substring(i * 8, (i + 1) * 8).getBytes(), currentVector);
            byte[] temp = cipher.doFinal(block);
            currentVector = xorBytes(currentVector, temp);
            result.append(bytesToHex(temp));
        }
 
        if (leftLength > 0) {
            currentVector = cipher.doFinal(currentVector);
            byte[] block = xorBytes(plaintext.substring(round * 8).getBytes(), currentVector);
            result.append(bytesToHex(block));
        }
 
        return result.toString().toUpperCase();
    }
 
    private static String encryptTwelve(String plaintext) throws Exception {
        byte[] iv = AES_IV.getBytes();
        byte[] key = AES_KEY.getBytes();
 
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);
        cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec);
 
        byte[] result = cipher.doFinal(plaintext.getBytes());
        return bytesToHex(result).toUpperCase();
    }
 
    private static String decryptEleven(String ciphertext) throws Exception {
        byte[] iv = hexStringToByteArray(BLOW_IV);
        byte[] key = hashToBytes(BLOW_KEY);
        byte[] encrypted = hexStringToByteArray(ciphertext.toLowerCase());
 
        int round = encrypted.length / 8;
        int leftLength = encrypted.length % 8;
        StringBuilder result = new StringBuilder();
        byte[] currentVector = iv.clone();
 
        Cipher cipher = Cipher.getInstance("Blowfish/ECB/NoPadding");
        SecretKeySpec secretKeySpec = new SecretKeySpec(key, "Blowfish");
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
 
        for (int i = 0; i < round; i++) {
            byte[] block = Arrays.copyOfRange(encrypted, i * 8, (i + 1) * 8);
            byte[] temp = xorBytes(cipher.doFinal(block), currentVector);
            currentVector = xorBytes(currentVector, block);
            result.append(new String(temp));
        }
 
        if (leftLength > 0) {
            currentVector = cipher.doFinal(currentVector);
            byte[] block = Arrays.copyOfRange(encrypted, round * 8, round * 8 + leftLength);
            result.append(new String(xorBytes(block, currentVector)));
        }
 
        return result.toString();
    }
 
    private static String decryptTwelve(String ciphertext) throws Exception {
        byte[] iv = AES_IV.getBytes();
        byte[] key = AES_KEY.getBytes();
        byte[] encrypted = hexStringToByteArray(ciphertext.toLowerCase());
 
        Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
        SecretKeySpec secretKeySpec = new SecretKeySpec(key, "AES");
        IvParameterSpec ivParameterSpec = new IvParameterSpec(iv);
        cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivParameterSpec);
 
        byte[] result = cipher.doFinal(encrypted);
        return new String(result);
    }
 
    private static byte[] xorBytes(byte[] bytes1, byte[] bytes2) {
        byte[] result = new byte[bytes1.length];
        for (int i = 0; i < bytes1.length; i++) {
            result[i] = (byte) (bytes1[i] ^ bytes2[i]);
        }
        return result;
    }
 
    private static byte[] hexStringToByteArray(String s) {
        int len = s.length();
        byte[] data = new byte[len / 2];
        for (int i = 0; i < len; i += 2) {
            data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
                    + Character.digit(s.charAt(i + 1), 16));
        }
        return data;
    }
 
    private static byte[] hashToBytes(String s) throws Exception {
        return MessageDigest.getInstance("SHA-1").digest(s.getBytes());
    }
 
    private static String bytesToHex(byte[] bytes) {
        StringBuilder result = new StringBuilder();
        for (byte b : bytes) {
            result.append(String.format("%02X", b));
        }
        return result.toString();
    }
}