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Chapter 8. 資料庫與加密

Table of Contents

8.1. MySQL 加密函數
8.1.1. AES_ENCRYPT / AES_DECRYPT
8.1.2. 通過PHP mcrypt 函數加密解密MySQL資料庫

8.1. MySQL 加密函數

8.1.1. AES_ENCRYPT / AES_DECRYPT

簡單用法

			
mysql> select AES_ENCRYPT('helloworld','key');
+---------------------------------+
| AES_ENCRYPT('helloworld','key') |
+---------------------------------+
|                                 |
+---------------------------------+
1 row in set (0.00 sec)

mysql> select AES_DECRYPT(AES_ENCRYPT('helloworld','key'),'key');
+----------------------------------------------------+
| AES_DECRYPT(AES_ENCRYPT('helloworld','key'),'key') |
+----------------------------------------------------+
| helloworld                                         |
+----------------------------------------------------+
1 row in set (0.00 sec)

mysql>
			
			

加密數據入庫

			
CREATE TABLE `encryption` (
	`mobile` VARBINARY(16) NOT NULL,
	`key` VARCHAR(32) NOT NULL
)
ENGINE=InnoDB;

INSERT INTO encryption(`mobile`,`key`)VALUES( AES_ENCRYPT('13691851789',md5('13691851789')), md5('13691851789')) 
select AES_DECRYPT(mobile,`key`), length(mobile) from encryption;
			
			

8.1.2. 通過PHP mcrypt 函數加密解密MySQL資料庫

由於AES_DECRYPT()與AES_ENCRYPT()會耗費一部們資料庫資源,於是我想出在外部實現AES_DECRYPT/AES_ENCRYPT同時完全兼容mysql。

MySQL AES_ENCRYPT() 加密,通過 PHP mcrypt_decrypt() 解密

PHP mcrypt_encrypt 加密,通過MySQL AES_DECRYPT() 解密

			
<?php
$dbh = new PDO ( 'mysql:host=192.168.6.1;dbname=test', 'www', 'passw0rd' );
$dbh->setAttribute ( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
$dbh->exec ( 'set names utf8' );
$data = 'Helloworld!!!';
//$data = '123456789';
$key = 'neo';

$sql = "SELECT AES_ENCRYPT(:data, :key) as string";
$stmt = $dbh->prepare ( $sql );
$stmt->execute ( array (
		':data' => $data,
		':key' => $key 
) );
$row = $stmt->fetch ( PDO::FETCH_ASSOC );
$encrypt = $row ['string'];
printf ( "MySQL AES Encrypt: %s \n", $encrypt );

$sql = "SELECT AES_DECRYPT(:data, :key) as string";
$stmt = $dbh->prepare ( $sql );
$stmt->execute ( array (
		':data' => $encrypt,
		':key' => $key 
) );
$row = $stmt->fetch ( PDO::FETCH_ASSOC );

$decrypt = $row ['string'];
printf ( "MySQL AES Decrypt: %s \n", $decrypt );
printf ( "-----------------------------------\n" );
function aes_decrypt($encrypted, $key) {
	return rtrim ( mcrypt_decrypt ( MCRYPT_RIJNDAEL_128, $key, $encrypted, MCRYPT_MODE_ECB, '' ), "\x00..\x1F" );
}
function aes_encrypt($decrypted, $key) {
	return mcrypt_encrypt ( MCRYPT_RIJNDAEL_128, $key, $decrypted, MCRYPT_MODE_ECB, '' );
}

printf ( "MySQL AES_ENCRYPT => PHP AES_Decrypt: %s => %s \n", $encrypt, aes_decrypt ( $encrypt, $key ) );

$str = 'Test by neo';

$sql = "SELECT AES_DECRYPT(:data, :key) as string";
$stmt = $dbh->prepare ( $sql );
$stmt->execute ( array (
		':data' => aes_encrypt ( $str, $key ),
		':key' => $key 
) );
$row = $stmt->fetch ( PDO::FETCH_ASSOC );

$decrypt = $row ['string'];
printf ( "PHP encrypt => MySQL Decrypt: %s => %s \n", $str, $decrypt );

printf ( "PHP enctypt => PHP  Decrypt: %s => %s \n", $str, aes_decrypt ( aes_encrypt ( $str, $key ), $key ) );
?>