PHP 8.1.28 Released!


SSL/SSH 能保护客户端和服务器端交换的数据,但 SSL/SSH 并不能保护数据库中已有的数据。SSL 只是一个加密网络数据流的协议。

如果攻击者取得了直接访问数据库的许可(绕过 web 服务器),敏感数据就可能暴露或者被滥用,除非数据库自己保护了这些信息。对数据库内的数据加密是减少这类风险的有效途径,但是只有很少的数据库提供这些加密功能。

解决这个问题最简单的方法是创建自己的加密包,然后在 PHP 脚本中使用它。PHP 可以通过一些扩展来帮助你解决这个问题,比如 OpenSSLSodium,涵盖了多种加密算法。脚本在将数据插入数据库之前对其进行加密,并在检索时对其进行解密。更多关于加密工作的例子请参见参考文献。


In the case of truly hidden data, if its raw representation is not needed (i.e. will not be displayed), hashing should be taken into consideration. The well-known example for hashing is storing the cryptographic hash of a password in a database, instead of the password itself.

The password functions provide a convenient way to hash sensitive data and work with these hashes.

password_hash() is used to hash a given string using the strongest algorithm currently available and password_verify() checks whether the given password matches the hash stored in database.

示例 #1 Hashing password field


// 存储密码散列
$query = sprintf("INSERT INTO users(name,pwd) VALUES('%s','%s');",
password_hash($password, PASSWORD_DEFAULT));
$result = pg_query($connection, $query);

// 发送请求来验证用户密码
$query = sprintf("SELECT pwd FROM users WHERE name='%s';",
$row = pg_fetch_assoc(pg_query($connection, $query));

if (
$row && password_verify($password, $row['pwd'])) {
'Welcome, ' . htmlspecialchars($username) . '!';
} else {
'Authentication failed for ' . htmlspecialchars($username) . '.';

add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top