MySQL数据库对敏感数据加密及解密的实现方式

/* 创建原始数据表 */

 CREATE TABLE `f_user` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(50) DEFAULT NULL,
 `tel` varchar(20) DEFAULT NULL,
 `pwd` varchar(50) DEFAULT NULL,
 PRIMARY KEY (`id`)
);
/* 新增原始数据 */
INSERT INTO `f_user` VALUES (1,'曹操','10000000000','Cc@123'),(2,'关羽','21000000000','Guanyu@21'),(3,'刘备','20000000000','LB#200000');

CREATE TABLE `f_user_m` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(200) DEFAULT NULL,
 `tel` varchar(100) DEFAULT NULL,
 `pwd` varbinary(255) DEFAULT NULL,
 PRIMARY KEY (`id`)
);

CREATE TABLE `f_user_p` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `name` varchar(200) DEFAULT NULL,
 `tel` varchar(100) DEFAULT NULL,
 `pwd` varchar(500) DEFAULT NULL,
 PRIMARY KEY (`id`)
);

/* 加密密码字段 */
mysql> insert into f_user_m (name,tel,pwd) 
select name,tel,AES_ENCRYPT(pwd,'MySQL') from f_user;
Query OK, 3 rows affected (0.00 sec)
Records: 3 Duplicates: 0 Warnings: 0

mysql> select name,tel,AES_DECRYPT(pwd,'MySQL')pwd from f_user_m; 
+--------+-------------+-----------+
| name | tel   | pwd  |
+--------+-------------+-----------+
| 曹操 | 10000000000 | Cc@123 |
| 关羽 | 21000000000 | Guanyu@21 |
| 刘备 | 20000000000 | LB#200000 |
+--------+-------------+-----------+
3 rows in set (0.00 sec)

#!/usr/bin/python
# coding=utf-8
import pymysql as mdb
import base64
sor_conn = mdb.connect(host='127.0.0.1',port=3306,user='root',passwd='Root@Py123')
sor_cur = sor_conn.cursor()
v_sql = "select name,tel,pwd from bak_db.f_user"
result_tb = sor_cur.execute(v_sql)
t = sor_cur.fetchall()
for col in t:
  v_name = col[0]
  v_tel = col[1]
  v_pwd = col[2]
  v_pwd = base64.encodestring(v_pwd) # 加密
  v_sql_insert = "insert into bak_db.f_user_p(name,tel,pwd) values('%s','%s','%s');" %(v_name,v_tel,v_pwd)
  sor_cur.execute(v_sql_insert)
  sor_conn.commit()
sor_conn.close()

/* 加密后的数据如下 */
mysql> select * from f_user_p;
+----+--------+-------------+---------------+
| id | name | tel   | pwd   |
+----+--------+-------------+---------------+
| 1 | 曹操 | 10000000000 | Q2NAMTIz
  |
| 2 | 关羽 | 21000000000 | R3Vhbnl1QDIx
 |
| 3 | 刘备 | 20000000000 | TEIjMjAwMDAw
 |
+----+--------+-------------+---------------+
3 rows in set (0.00 sec)

#!/usr/bin/python
# coding=utf-8
from Crypto.Cipher import AES
import pymysql as mdb
from binascii import b2a_hex, a2b_hex
import sys
sor_conn = mdb.connect(host='127.0.0.1',port=3306,user='root',passwd='Root@Py123')
sor_cur = sor_conn.cursor()
class PyDbString():
  def __init__(self):
    self.key = 'pythonkey2020320'
    self.mode = AES.MODE_CBC
  def addString(self, text):
    cryptor = AES.new(self.key, self.mode, self.key)
    length = 32
    count = len(text)
    add = length - (count % length)
    text = text + ('\0' * add)
    self.ciphertext = cryptor.encrypt(text)
    return b2a_hex(self.ciphertext)
  def desString(self, text):
    cryptor = AES.new(self.key, self.mode, self.key)
    plain_text = cryptor.decrypt(a2b_hex(text))
    return plain_text.rstrip('\0')
v_strpass = PyDbString()
v_sql = "select name,tel,pwd from bak_db.f_user"
result_tb = sor_cur.execute(v_sql)
t = sor_cur.fetchall()
for col in t:
  v_name = col[0]
  v_tel = col[1]
  v_pwd = col[2]
  print(v_pwd)
  v_pwd = v_strpass.addString(v_pwd) # 加密
  v_sql_insert = "insert into bak_db.f_user_p(name,tel,pwd) values('%s','%s','%s');" %(v_name,v_tel,v_pwd)
  sor_cur.execute(v_sql_insert)
  sor_conn.commit()
sor_conn.close()