Detailed explanation of MySQL encryption

MySQL field encryption and decryption

1. Encryption:

    aes_encrypt('admin','key')

2. Decryption ：

  aes_decrypt(password,'key')

2. Two-way encryption uses a key to encrypt. When decrypting, only the person who knows the key can decrypt

Encryption: encode()

Decryption: decode()

Encode('123456' 'adfdgfdhggfh');

decode(password,'adfdgfdhggfh');

3.PASSWORD('123456')

Password encryption is irreversible

4.MD5('123456')

//UserDao 
public User login(Connection con,User user) throws Exception{
        User resultUser=null;
        String sql="select userName,AES_DECRYPT(password,'key') password from t_user where userName=? and AES_DECRYPT(PASSWORD,'key')=?";
        PreparedStatement pstmt=con.prepareStatement(sql);
        pstmt.setString(1, user.getUserName());
        pstmt.setString(2, user.getPassword());
        ResultSet rs=pstmt.executeQuery();
        if(rs.next()){
            resultUser=new User();
            resultUser.setUserName(rs.getString(1));
            resultUser.setPassword(rs.getString(2));
            System.out.println(resultUser.getPassword()+"^^^^^");
        }
        return resultUser;
    }
}
   
 //sql语句 
 insert into t_user (userName,password) values('admin',AES_ENCRYPT('123456','key'));  
 select userName,AES_DECRYPT(password,'key')password from t_user;

The above is the detailed content of Detailed explanation of MySQL encryption. For more information, please follow other related articles on the PHP Chinese website!