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<?php |
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/** |
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* @author Todd Burry <[email protected]> |
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* @copyright 2009-2014 Vanilla Forums Inc. |
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* @license Proprietary |
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*/ |
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namespace Garden\Password; |
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/** |
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* Implements the vBulletin password hash algorithms. |
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* |
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* VBulletin itself stores password salts in a separate database column. In order to use a vBulletin password with this |
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* class you must concatenate the salt to the end of the password hash. The vBulletin password hashing algorithm is a |
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* poor choice for your passwords because it uses md5 which is very insecure. |
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* |
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* We recommend using this class to validate existing vBulletin passwords, but then rehashing them with a different |
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* algorithm. |
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*/ |
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class VbulletinPassword implements IPassword { |
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/** |
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* Hashes a plaintext password. |
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* |
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* @param string $password The password to hash. |
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* @return string Returns the hashed password. |
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*/ |
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public function hash($password) { |
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$salt = base64_encode(openssl_random_pseudo_bytes(12)); |
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return $this->hashRaw($password, $salt).$salt; |
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} |
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protected function hashRaw($password, $salt) { |
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$hash = md5(md5($password).$salt); |
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return $hash; |
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} |
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/** |
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* Checks if a given password hash needs to be re-hashed to to a stronger algorithm. |
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* |
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* @param string $hash The hash to check. |
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* @return bool Returns `true` |
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*/ |
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public function needsRehash($hash) { |
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return strlen($hash) < 37; |
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} |
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/** |
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* Check to make sure a password matches its stored hash. |
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* |
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* @param string $password The password to verify. |
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* @param string $hash The stored password hash. |
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* @return bool Returns `true` if the password matches the stored hash. |
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*/ |
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public function verify($password, $hash) { |
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list($stored_hash, $salt) = $this->splitSalt($hash); |
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$calculated_hash = $this->hashRaw($password, $salt); |
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$result = $calculated_hash === $stored_hash; |
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return $result; |
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} |
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/** |
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* Split the salt and hash from a single hash. |
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* |
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* @param string $hash The hash to split. |
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* @return array An array in the form `[$hash, $salt]`. |
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*/ |
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public function splitSalt($hash) { |
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// The hash is in the form: <32 char hash><salt>. |
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$salt_length = strlen($hash) - 32; |
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$salt = trim(substr($hash, -$salt_length, $salt_length)); |
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$stored_hash = substr($hash, 0, strlen($hash) - $salt_length); |
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return [$stored_hash, $salt]; |
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} |
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} |
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vanilla /
garden
