wordpress密码生成与登录密码验证_wordpress教程_php教程

WordPress密码已成为整合的首要目标，如何征服整合，就得了解WordPress密码算法。

WordPress系统的用户密码是保存在wp_users数据表的user_pass字段，密码是通过Portable PHP password hashing framework类产生的，密码的形式是随机且不可逆，同一个明文的密码在不同时间，产生的密文也不一样，相对来说较为安全。

二。密码生成方式

> 随机产生一个salt 并将salt和password相加

> 进行了count次md5 然后和encode64的hash数值累加

> 最后得到一个以$P$开头的密码，这个密码每次产生的结果都不一样

以下为在wordpress中调用密码生成的代码

[php] view plain copy print?在CODE上查看代码片派生到我的代码片

<?php

$password = 'abc';

global $wp_hasher;

if ( empty($wp_hasher) ) {

require_once( './wp-includes/class-phpass.php');

$wp_hasher = new PasswordHash(8, TRUE);

}

echo $wp_hasher->HashPassword($password);

三。wordpress密码生成与登录验证

wordpress中位置为\wp-includes\class-phpass.php

以下是wordpress中生成密码的代码直接运行可查看密码的生成以及验证过程

[php] view plain copy print?在CODE上查看代码片派生到我的代码片

<?php

class PasswordHash {

var $itoa64;

var $iteration_count_log2;

var $portable_hashes;

var $random_state;

function PasswordHash($iteration_count_log2, $portable_hashes)

{

$this->itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';

if ($iteration_count_log2 < 4 || $iteration_count_log2 > 31)

$iteration_count_log2 = 8;

$this->iteration_count_log2 = $iteration_count_log2;

$this->portable_hashes = $portable_hashes;

$this->random_state = microtime() . uniqid(rand(), TRUE); // removed getmypid() for compability reasons

}

function get_random_bytes($count)

{

$output = '';

if ( @is_readable('/dev/urandom') &&

($fh = @fopen('/dev/urandom', 'rb'))) {

$output = fread($fh, $count);

fclose($fh);

}

if (strlen($output) < $count) {

$output = '';

for ($i = 0; $i < $count; $i += 16) {

$this->random_state =

md5(microtime() . $this->random_state);

$output .=

pack('H*', md5($this->random_state));

}

$output = substr($output, 0, $count);

}

return $output;

}

function encode64($input, $count)

{

$output = '';

$i = 0;

do {

$value = ord($input[$i++]);

$output .= $this->itoa64[$value & 0x3f];

if ($i < $count)

$value |= ord($input[$i]) << 8;

$output .= $this->itoa64[($value >> 6) & 0x3f];

if ($i++ >= $count)

break;

if ($i < $count)

$value |= ord($input[$i]) << 16;

$output .= $this->itoa64[($value >> 12) & 0x3f];

if ($i++ >= $count)

break;

$output .= $this->itoa64[($value >> 18) & 0x3f];

} while ($i < $count);

return $output;

}

function gensalt_private($input)

{

$output = '$PXXXXX;

$output .= $this->itoa64[min($this->iteration_count_log2 +

((PHP_VERSION >= '5') ? 5 : 3), 30)];

$output .= $this->encode64($input, 6);

return $output;

}

function crypt_private($password, $setting)

{

$output = '*0';

if (substr($setting, 0, 2) == $output)

$output = '*1';

$id = substr($setting, 0, 3);

# We use "$P{1}quot;, phpBB3 uses "$H{1}quot; for the same thing

if ($id != '$PXXXXX && $id != '$HXXXXX)

return $output;

$count_log2 = strpos($this->itoa64, $setting[3]);

if ($count_log2 < 7 || $count_log2 > 30)

return $output;

$count = 1 << $count_log2;

$salt = substr($setting, 4, 8);

if (strlen($salt) != 8)

return $output;

# We're kind of forced to use MD5 here since it's the only

# cryptographic primitive available in all versions of PHP

# currently in use. To implement our own low-level crypto

# in PHP would result in much worse performance and

# consequently in lower iteration counts and hashes that are

# quicker to crack (by non-PHP code).

if (PHP_VERSION >= '5') {

$hash = md5($salt . $password, TRUE);

do {

$hash = md5($hash . $password, TRUE);

} while (--$count);

} else {

$hash = pack('H*', md5($salt . $password));

do {

$hash = pack('H*', md5($hash . $password));

} while (--$count);

}

$output = substr($setting, 0, 12);

$output .= $this->encode64($hash, 16);

return $output;

}

function gensalt_extended($input)

{

$count_log2 = min($this->iteration_count_log2 + 8, 24);

# This should be odd to not reveal weak DES keys, and the

# maximum valid value is (2**24 - 1) which is odd anyway.

$count = (1 << $count_log2) - 1;

$output = '_';

$output .= $this->itoa64[$count & 0x3f];

$output .= $this->itoa64[($count >> 6) & 0x3f];

$output .= $this->itoa64[($count >> 12) & 0x3f];

$output .= $this->itoa64[($count >> 18) & 0x3f];

$output .= $this->encode64($input, 3);

return $output;

}

function gensalt_blowfish($input)

{

# This one needs to use a different order of characters and a

# different encoding scheme from the one in encode64() above.

# We care because the last character in our encoded string will

# only represent 2 bits. While two known implementations of

# bcrypt will happily accept and correct a salt string which

# has the 4 unused bits set to non-zero, we do not want to take

# chances and we also do not want to waste an additional byte

# of entropy.

$itoa64 = './ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

$output = '$2aXXXXX;

$output .= chr(ord('0') + $this->iteration_count_log2 / 10);

$output .= chr(ord('0') + $this->iteration_count_log2 % 10);

$output .= 'XXXXX;

$i = 0;

do {

$c1 = ord($input[$i++]);

$output .= $itoa64[$c1 >> 2];

$c1 = ($c1 & 0x03) << 4;

if ($i >= 16) {

$output .= $itoa64[$c1];

break;

}

$c2 = ord($input[$i++]);

$c1 |= $c2 >> 4;

$output .= $itoa64[$c1];

$c1 = ($c2 & 0x0f) << 2;

$c2 = ord($input[$i++]);

$c1 |= $c2 >> 6;

$output .= $itoa64[$c1];

$output .= $itoa64[$c2 & 0x3f];

} while (1);

return $output;

}

function HashPassword($password)

{

$random = '';

if (CRYPT_BLOWFISH == 1 && !$this->portable_hashes) {

$random = $this->get_random_bytes(16);

$hash =

crypt($password, $this->gensalt_blowfish($random));

if (strlen($hash) == 60)

return $hash;

}

if (CRYPT_EXT_DES == 1 && !$this->portable_hashes) {

if (strlen($random) < 3)

$random = $this->get_random_bytes(3);

$hash =

crypt($password, $this->gensalt_extended($random));

if (strlen($hash) == 20)

return $hash;

}

if (strlen($random) < 6)

$random = $this->get_random_bytes(6);

$hash =

$this->crypt_private($password,

$this->gensalt_private($random));

if (strlen($hash) == 34)

return $hash;

# Returning '*' on error is safe here, but would _not_ be safe

# in a crypt(3)-like function used _both_ for generating new

# hashes and for validating passwords against existing hashes.

return '*';

}

function CheckPassword($password, $stored_hash)

{

$hash = $this->crypt_private($password, $stored_hash);

if ($hash[0] == '*')

$hash = crypt($password, $stored_hash);

return $hash == $stored_hash;

}

//原始密码

$passwordValue = "123456";

//生成密码

$wp_hasher = new PasswordHash(8, TRUE);

$sigPassword = $wp_hasher->HashPassword($passwordValue);

echo "生成的密码为:".$sigPassword;

echo "\n";

//验证密码

$data = $wp_hasher->CheckPassword($passwordValue,$sigPassword);

if($data){

echo '密码正确';

}else{

echo '密码错误';

}

此为一个wordpres密码生成与登录验证实例，其中HashPassword为生成密码，CheckPassword为验证密码

itoa64 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; 为以上提到的生成salt的基础字符串。

备注：由于csdn代码显示插件对特殊字符的限制。请将以上代码中 XXXXX替换为 $' 注意有单引号，代码中一共有5处

(责任编辑：好模板)