PHP - hash_pbkdf2函数 [英] PHP - hash_pbkdf2 function

问题描述

我试图做一个函数来使用这个php函数来哈希密码： http://be.php.net/manual/en/function.hash-pbkdf2.php 。

以下是代码：

  $ hash_algo =sha256; 
 $ password =password; 
 $ salt =salt; 
 $ iterations = 1; 
 $ length = 1; 
 $ raw_output = false; 
 
 $ hash = hash_pbkdf2（$ hash_algo，$ password，$ salt，$ iterations，$ length，$ raw_output）; 
 
 echo $ hash; 
  

我得到这个错误：致命错误：调用未定义的函数hash_pbkdf2（）

函数如何被定义为不可用？

PS：我所有的变量值都是设置仅用于测试功能。显然盐不会是盐等。 编辑：<

这个函数在核心PHP中还没有（还有）。这是不久前提出的，到目前为止，您只能将其作为补丁 。

您可以使用 crypt 或 hash 来代替。
crypt 实际上是在 hash_pbkdf2 文档：

警告

PBKDF2方法可用于散列存储密码（NIST已批准使用该密码）。但是，应该注意 CRYPT_BLOWFISH 更适合于密码存储，应该通过 crypt（）来使用。

I'm trying to do a function to hash passwords with this php function: http://be.php.net/manual/en/function.hash-pbkdf2.php.

Here is the code:

$hash_algo = "sha256";
$password = "password";
$salt = "salt";
$iterations = 1;
$length = 1;
$raw_output = false;

$hash = hash_pbkdf2($hash_algo, $password, $salt, $iterations ,$length ,$raw_output);

echo $hash;

I got this error: Fatal error: Call to undefined function hash_pbkdf2().

How can the function be undefined???

PS: All the values of my variables are set just for testing the function. Obviously the salt will not be "salt", etc.

解决方案

EDIT: As of PHP 5.5.0 this function is now bundled into the core library.

---

This function is not (yet anyway) available in core PHP. It was proposed not that long ago and so far you can only get it as a patch.

You can use crypt or hash instead. crypt is actually suggested in hash_pbkdf2 documentation:

Caution
The PBKDF2 method can be used for hashing passwords for storage (it is NIST approved for that use). However, it should be noted that CRYPT_BLOWFISH is better suited for password storage and should be used instead via crypt().

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