我一直在使用pbkdf2讓我的用戶密碼真正安全。使用PBKDF2在MySQL數據庫中存儲密碼和鹽
密碼哈希進入數據庫罰款,但鹽不是。
看起來鹽包含異域字符,MySQL列不喜歡。
我'用戶'表中的所有列都是UTF8_unicode_ci。
這裏是我的密碼散列器:
$size = mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CFB);
$salt = mcrypt_create_iv($size, MCRYPT_DEV_RANDOM);
$passHash = pbkdf2('SHA512', $pass, $salt, 8192, 256) ;
include("dbconnect.php") ;
$result = $dbh->prepare("INSERT INTO users (name, email, qq, password, salt)VALUES(?, ?, ?, ?, ?)") ;
$result->bindParam(1, $name, PDO::PARAM_STR) ;
$result->bindParam(2, $email, PDO::PARAM_STR) ;
$result->bindParam(3, $qq, PDO::PARAM_STR) ;
$result->bindParam(4, $passHash, PDO::PARAM_STR) ;
$result->bindParam(5, $salt, PDO::PARAM_STR) ;
$result->execute() ;
而且PBKDF2:
/*
* PBKDF2 key derivation function as defined by RSA's PKCS #5: https://www.ietf.org/rfc/rfc2898.txt
* $algorithm - The hash algorithm to use. Recommended: SHA256
* $password - The password.
* $salt - A salt that is unique to the password.
* $count - Iteration count. Higher is better, but slower. Recommended: At least 1000.
* $key_length - The length of the derived key in bytes.
* $raw_output - If true, the key is returned in raw binary format. Hex encoded otherwise.
* Returns: A $key_length-byte key derived from the password and salt.
*
* Test vectors can be found here: https://www.ietf.org/rfc/rfc6070.txt
*
* This implementation of PBKDF2 was originally created by https://defuse.ca
* With improvements by http://www.variations-of-shadow.com
*/
function pbkdf2($algorithm, $password, $salt, $count, $key_length, $raw_output = false){
$algorithm = strtolower($algorithm);
if(!in_array($algorithm, hash_algos(), true))
die('PBKDF2 ERROR: Invalid hash algorithm.');
if($count <= 0 || $key_length <= 0)
die('PBKDF2 ERROR: Invalid parameters.');
$hash_length = strlen(hash($algorithm, "", true));
$block_count = ceil($key_length/$hash_length);
$output = "";
for($i = 1; $i <= $block_count; $i++) {
// $i encoded as 4 bytes, big endian.
$last = $salt . pack("N", $i);
// first iteration
$last = $xorsum = hash_hmac($algorithm, $last, $password, true);
// perform the other $count - 1 iterations
for ($j = 1; $j < $count; $j++) {
$xorsum ^= ($last = hash_hmac($algorithm, $last, $password, true));
}
$output .= $xorsum;
}
if($raw_output)
return substr($output, 0, $key_length);
else
return bin2hex(substr($output, 0, $key_length));
}
而且,我剛纔注意到,它是屬於同一存儲完全不同的散列的口令。
我正在做這個對嗎?
正如註釋所示:「$ salt - 密碼唯一的鹽」。每個密碼都有不同的鹽,因此相同密碼的散列值將會不同。 – Neil 2016-02-01 10:56:35