您好，感谢您阅读，
我有一项任务是根据存储在MySQL数据库中的密码验证un / pw对，该数据库有joomla作为CMS /前端。
joomla Web应用程序支持在所述数据库中存储用户名和密码，并且在存储新用户时它似乎会经历以下步骤 -
$salt = JUserHelper::genRandomPassword(32);
$crypt = JUserHelper::getCryptedPassword($array['password'], $salt);
$array['password'] = $crypt.':'.$salt;
genRandomPassword看起来像 -
/**
* Generate a random password
*
* @static
* @param int $length Length of the password to generate
* @return string Random Password
* @since 1.5
*/
public static function genRandomPassword($length = 8)
{
$salt = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$len = strlen($salt);
$makepass = '';
$stat = @stat(__FILE__);
if (empty($stat) || !is_array($stat)) $stat = array(php_uname());
mt_srand(crc32(microtime() . implode('|', $stat)));
for ($i = 0; $i < $length; $i ++) {
$makepass .= $salt[mt_rand(0, $len -1)];
}
return $makepass;
}
最后，getCryptedPassword和getSalt看起来像 -
/**
* Formats a password using the current encryption.
*
* @access public
* @param string $plaintext The plaintext password to encrypt.
* @param string $salt The salt to use to encrypt the password. []
* If not present, a new salt will be
* generated.
* @param string $encryption The kind of pasword encryption to use.
* Defaults to md5-hex.
* @param boolean $show_encrypt Some password systems prepend the kind of
* encryption to the crypted password ({SHA},
* etc). Defaults to false.
*
* @return string The encrypted password.
*/
public static function getCryptedPassword($plaintext, $salt = '', $encryption = 'md5-hex', $show_encrypt = false)
{
// Get the salt to use.
$salt = JUserHelper::getSalt($encryption, $salt, $plaintext);
// Encrypt the password.
switch ($encryption)
{
case 'plain' :
return $plaintext;
case 'sha' :
$encrypted = base64_encode(mhash(MHASH_SHA1, $plaintext));
return ($show_encrypt) ? '{SHA}'.$encrypted : $encrypted;
case 'crypt' :
case 'crypt-des' :
case 'crypt-md5' :
case 'crypt-blowfish' :
return ($show_encrypt ? '{crypt}' : '').crypt($plaintext, $salt);
case 'md5-base64' :
$encrypted = base64_encode(mhash(MHASH_MD5, $plaintext));
return ($show_encrypt) ? '{MD5}'.$encrypted : $encrypted;
case 'ssha' :
$encrypted = base64_encode(mhash(MHASH_SHA1, $plaintext.$salt).$salt);
return ($show_encrypt) ? '{SSHA}'.$encrypted : $encrypted;
case 'smd5' :
$encrypted = base64_encode(mhash(MHASH_MD5, $plaintext.$salt).$salt);
return ($show_encrypt) ? '{SMD5}'.$encrypted : $encrypted;
case 'aprmd5' :
$length = strlen($plaintext);
$context = $plaintext.'$apr1$'.$salt;
$binary = JUserHelper::_bin(md5($plaintext.$salt.$plaintext));
for ($i = $length; $i > 0; $i -= 16) {
$context .= substr($binary, 0, ($i > 16 ? 16 : $i));
}
for ($i = $length; $i > 0; $i >>= 1) {
$context .= ($i & 1) ? chr(0) : $plaintext[0];
}
$binary = JUserHelper::_bin(md5($context));
for ($i = 0; $i < 1000; $i ++) {
$new = ($i & 1) ? $plaintext : substr($binary, 0, 16);
if ($i % 3) {
$new .= $salt;
}
if ($i % 7) {
$new .= $plaintext;
}
$new .= ($i & 1) ? substr($binary, 0, 16) : $plaintext;
$binary = JUserHelper::_bin(md5($new));
}
$p = array ();
for ($i = 0; $i < 5; $i ++) {
$k = $i +6;
$j = $i +12;
if ($j == 16) {
$j = 5;
}
$p[] = JUserHelper::_toAPRMD5((ord($binary[$i]) << 16) | (ord($binary[$k]) << 8) | (ord($binary[$j])), 5);
}
return '$apr1$'.$salt.'$'.implode('', $p).JUserHelper::_toAPRMD5(ord($binary[11]), 3);
case 'md5-hex' :
default :
$encrypted = ($salt) ? md5($plaintext.$salt) : md5($plaintext);
return ($show_encrypt) ? '{MD5}'.$encrypted : $encrypted;
}
}
/**
* Returns a salt for the appropriate kind of password encryption.
* Optionally takes a seed and a plaintext password, to extract the seed
* of an existing password, or for encryption types that use the plaintext
* in the generation of the salt.
*
* @access public
* @param string $encryption The kind of pasword encryption to use.
* Defaults to md5-hex.
* @param string $seed The seed to get the salt from (probably a
* previously generated password). Defaults to
* generating a new seed.
* @param string $plaintext The plaintext password that we're generating
* a salt for. Defaults to none.
*
* @return string The generated or extracted salt.
*/
public static function getSalt($encryption = 'md5-hex', $seed = '', $plaintext = '')
{
// Encrypt the password.
switch ($encryption)
{
case 'crypt' :
case 'crypt-des' :
if ($seed) {
return substr(preg_replace('|^{crypt}|i', '', $seed), 0, 2);
} else {
return substr(md5(mt_rand()), 0, 2);
}
break;
case 'crypt-md5' :
if ($seed) {
return substr(preg_replace('|^{crypt}|i', '', $seed), 0, 12);
} else {
return '$1$'.substr(md5(mt_rand()), 0, 8).'$';
}
break;
case 'crypt-blowfish' :
if ($seed) {
return substr(preg_replace('|^{crypt}|i', '', $seed), 0, 16);
} else {
return '$2$'.substr(md5(mt_rand()), 0, 12).'$';
}
break;
case 'ssha' :
if ($seed) {
return substr(preg_replace('|^{SSHA}|', '', $seed), -20);
} else {
return mhash_keygen_s2k(MHASH_SHA1, $plaintext, substr(pack('h*', md5(mt_rand())), 0, 8), 4);
}
break;
case 'smd5' :
if ($seed) {
return substr(preg_replace('|^{SMD5}|', '', $seed), -16);
} else {
return mhash_keygen_s2k(MHASH_MD5, $plaintext, substr(pack('h*', md5(mt_rand())), 0, 8), 4);
}
break;
case 'aprmd5' :
/* 64 characters that are valid for APRMD5 passwords. */
$APRMD5 = './0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
if ($seed) {
return substr(preg_replace('/^\$apr1\$(.{8}).*/', '\\1', $seed), 0, 8);
} else {
$salt = '';
for ($i = 0; $i < 8; $i ++) {
$salt .= $APRMD5 {
rand(0, 63)
};
}
return $salt;
}
break;
default :
$salt = '';
if ($seed) {
$salt = $seed;
}
return $salt;
break;
}
}
我不是PHP或Joomla专家，但我在一定程度上理解发生了什么。我相信就加密算法而言，正在使用md5。
我的问题是 -
对于像这样存储的密码验证un / pw组合，我需要做什么？目前，盐不会与PW一起储存，所以我在这里需要做什么呢？我不需要任何代码或伪代码我只需要一个明确的步骤列表。如果您确实想提供代码，我正在用Java编写我的应用程序。
编辑 -
好的，我已经进一步向我正在使用的身份验证库提供salt / crypto密码，但它表示即使经过所有的哈希/解密后它们也不匹配。我想我将不得不更多地玩这个。
使用下面评论中提供的示例PW，这是我的java代码：
SimpleAuthenticationInfo info = new SimpleAuthenticationInfo("TestUser",
"564c6d2c10a7135fe0ddf0b21d1a1226", getName());
info.setCredentialsSalt(new SimpleByteSource("B9YEkhvnV8pZ8BU7fvVlIVTbEux5N17J"));
return info;
这是我得到的回应 -
Submitted credentials for token [org.apache.shiro.authc.UsernamePasswordToken - TestUser, rememberMe=false] did not match the expected credentials.
我想我很接近，但我仍然不在那里。由于我们没有将算法名称传递给getCryptedPassword PHP函数，我猜它是使用默认值，看起来是MD5。我想知道为什么这不起作用。
谢谢，
-Zachary Carter
答案 0 :(得分：1)
试试这个。
指定用户名$un和纯文本密码$pw：
jimport( 'joomla.user.helper' );
$userId = JUserHelper::getUserId( $un );
$user = JUser::getInstance( $userId );
$existingPasswordParts = explode( ':', $user->password );
$salt = $existingPasswordParts[1];
$crypt = JUserHelper::getCryptedPassword( $pw, $salt );
$password = $crypt . ':' . $salt;
if ( $user->password == $password )
{
/* match */
}
提取用户，并重新使用用过的盐来加密纯文本密码。之后，两个加密密码可以相互比较。 这应该适用于J1.6，J1.7和J2.5。
答案 1 :(得分：1)
Joomla正在将哈希构建为纯文本pw + salt，但是当Shiro进行身份验证时，它将哈希构建为salt + plain-text pw。解决方案是继承SimpleCredentialsMatcher和AbstractHash。我无法覆盖现有子类中的方法，因为它们都受到保护。