Question

我正在Android上创建一个基本的登录和注册应用程序。

我目前正面临一个问题，我可以加密密码（如图所示），但当我尝试登录我的Android应用程序时，它失败了。

我尝试进行非加密登录，但确实有效。

我的理论是，PHP文件无法比较或解密密码哈希？

下面的代码和截图。谢谢你的时间！

的的login.php

<?php
require("password.php");

$con = mysqli_connect("?", "?", "?", "?");

$username = $_POST["username"];
$password = $_POST["password"];

$statement = mysqli_prepare($con, "SELECT * FROM user WHERE username = ?");
mysqli_stmt_bind_param($statement, "s", $username);
mysqli_stmt_execute($statement);
mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement, $colUserID, $colName, $colUsername, $colAge, $colPassword);

$response = array();
$response["success"] = false;  

while(mysqli_stmt_fetch($statement)){
    if (password_verify($password, $colPassword)) {
        $response["success"] = true;  
        $response["name"] = $colName;
        $response["age"] = $colAge;
    }
}

echo json_encode($response); ?>

Register.php

<?php
require("password.php");

$connect = mysqli_connect("?", "?", "?", "?");

$name = $_POST["name"];
$age = $_POST["age"];
$username = $_POST["username"];
$password = $_POST["password"];

 function registerUser() {
    global $connect, $name, $age, $username, $password;
    $passwordHash = password_hash($password, PASSWORD_DEFAULT);
    $statement = mysqli_prepare($connect, "INSERT INTO user (name, age, username, password) VALUES (?, ?, ?, ?)");
    mysqli_stmt_bind_param($statement, "siss", $name, $age, $username, $passwordHash);
    mysqli_stmt_execute($statement);
    mysqli_stmt_close($statement);     
}

function usernameAvailable() {
    global $connect, $username;
    $statement = mysqli_prepare($connect, "SELECT * FROM user WHERE username = ?"); 
    mysqli_stmt_bind_param($statement, "s", $username);
    mysqli_stmt_execute($statement);
    mysqli_stmt_store_result($statement);
    $count = mysqli_stmt_num_rows($statement);
    mysqli_stmt_close($statement); 
    if ($count < 1){
        return true; 
    }else {
        return false; 
    }
}

$response = array();
$response["success"] = false;  

if (usernameAvailable()){
    registerUser();
    $response["success"] = true;  
}

echo json_encode($response); ?>

password.php

<?php namespace {

if (!defined('PASSWORD_BCRYPT')) {
    /**
     * PHPUnit Process isolation caches constants, but not function declarations.
     * So we need to check if the constants are defined separately from 
     * the functions to enable supporting process isolation in userland
     * code.
     */
    define('PASSWORD_BCRYPT', 1);
    define('PASSWORD_DEFAULT', PASSWORD_BCRYPT);
    define('PASSWORD_BCRYPT_DEFAULT_COST', 10);
}

if (!function_exists('password_hash')) {

    /**
     * Hash the password using the specified algorithm
     *
     * @param string $password The password to hash
     * @param int    $algo     The algorithm to use (Defined by PASSWORD_* constants)
     * @param array  $options  The options for the algorithm to use
     *
     * @return string|false The hashed password, or false on error.
     */
    function password_hash($password, $algo, array $options = array()) {
        if (!function_exists('crypt')) {
            trigger_error("Crypt must be loaded for password_hash to function", E_USER_WARNING);
            return null;
        }
        if (is_null($password) || is_int($password)) {
            $password = (string) $password;
        }
        if (!is_string($password)) {
            trigger_error("password_hash(): Password must be a string", E_USER_WARNING);
            return null;
        }
        if (!is_int($algo)) {
            trigger_error("password_hash() expects parameter 2 to be long, " . gettype($algo) . " given", E_USER_WARNING);
            return null;
        }
        $resultLength = 0;
        switch ($algo) {
            case PASSWORD_BCRYPT:
                $cost = PASSWORD_BCRYPT_DEFAULT_COST;
                if (isset($options['cost'])) {
                    $cost = (int) $options['cost'];
                    if ($cost < 4 || $cost > 31) {
                        trigger_error(sprintf("password_hash(): Invalid bcrypt cost parameter specified: %d", $cost), E_USER_WARNING);
                        return null;
                    }
                }
                // The length of salt to generate
                $raw_salt_len = 16;
                // The length required in the final serialization
                $required_salt_len = 22;
                $hash_format = sprintf("$2y$%02d$", $cost);
                // The expected length of the final crypt() output
                $resultLength = 60;
                break;
            default:
                trigger_error(sprintf("password_hash(): Unknown password hashing algorithm: %s", $algo), E_USER_WARNING);
                return null;
        }
        $salt_req_encoding = false;
        if (isset($options['salt'])) {
            switch (gettype($options['salt'])) {
                case 'NULL':
                case 'boolean':
                case 'integer':
                case 'double':
                case 'string':
                    $salt = (string) $options['salt'];
                    break;
                case 'object':
                    if (method_exists($options['salt'], '__tostring')) {
                        $salt = (string) $options['salt'];
                        break;
                    }
                case 'array':
                case 'resource':
                default:
                    trigger_error('password_hash(): Non-string salt parameter supplied', E_USER_WARNING);
                    return null;
            }
            if (PasswordCompat\binary\_strlen($salt) < $required_salt_len) {
                trigger_error(sprintf("password_hash(): Provided salt is too short: %d expecting %d", PasswordCompat\binary\_strlen($salt), $required_salt_len), E_USER_WARNING);
                return null;
            } elseif (0 == preg_match('#^[a-zA-Z0-9./]+$#D', $salt)) {
                $salt_req_encoding = true;
            }
        } else {
            $buffer = '';
            $buffer_valid = false;
            if (function_exists('mcrypt_create_iv') && !defined('PHALANGER')) {
                $buffer = mcrypt_create_iv($raw_salt_len, MCRYPT_DEV_URANDOM);
                if ($buffer) {
                    $buffer_valid = true;
                }
            }
            if (!$buffer_valid && function_exists('openssl_random_pseudo_bytes')) {
                $strong = false;
                $buffer = openssl_random_pseudo_bytes($raw_salt_len, $strong);
                if ($buffer && $strong) {
                    $buffer_valid = true;
                }
            }
            if (!$buffer_valid && @is_readable('/dev/urandom')) {
                $file = fopen('/dev/urandom', 'r');
                $read = 0;
                $local_buffer = '';
                while ($read < $raw_salt_len) {
                    $local_buffer .= fread($file, $raw_salt_len - $read);
                    $read = PasswordCompat\binary\_strlen($local_buffer);
                }
                fclose($file);
                if ($read >= $raw_salt_len) {
                    $buffer_valid = true;
                }
                $buffer = str_pad($buffer, $raw_salt_len, "\0") ^ str_pad($local_buffer, $raw_salt_len, "\0");
            }
            if (!$buffer_valid || PasswordCompat\binary\_strlen($buffer) < $raw_salt_len) {
                $buffer_length = PasswordCompat\binary\_strlen($buffer);
                for ($i = 0; $i < $raw_salt_len; $i++) {
                    if ($i < $buffer_length) {
                        $buffer[$i] = $buffer[$i] ^ chr(mt_rand(0, 255));
                    } else {
                        $buffer .= chr(mt_rand(0, 255));
                    }
                }
            }
            $salt = $buffer;
            $salt_req_encoding = true;
        }
        if ($salt_req_encoding) {
            // encode string with the Base64 variant used by crypt
            $base64_digits =
                'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
            $bcrypt64_digits =
                './ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';

            $base64_string = base64_encode($salt);
            $salt = strtr(rtrim($base64_string, '='), $base64_digits, $bcrypt64_digits);
        }
        $salt = PasswordCompat\binary\_substr($salt, 0, $required_salt_len);

        $hash = $hash_format . $salt;

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

        if (!is_string($ret) || PasswordCompat\binary\_strlen($ret) != $resultLength) {
            return false;
        }

        return $ret;
    }

    /**
     * Get information about the password hash. Returns an array of the information
     * that was used to generate the password hash.
     *
     * array(
     *    'algo' => 1,
     *    'algoName' => 'bcrypt',
     *    'options' => array(
     *        'cost' => PASSWORD_BCRYPT_DEFAULT_COST,
     *    ),
     * )
     *
     * @param string $hash The password hash to extract info from
     *
     * @return array The array of information about the hash.
     */
    function password_get_info($hash) {
        $return = array(
            'algo' => 0,
            'algoName' => 'unknown',
            'options' => array(),
        );
        if (PasswordCompat\binary\_substr($hash, 0, 4) == '$2y$' && PasswordCompat\binary\_strlen($hash) == 60) {
            $return['algo'] = PASSWORD_BCRYPT;
            $return['algoName'] = 'bcrypt';
            list($cost) = sscanf($hash, "$2y$%d$");
            $return['options']['cost'] = $cost;
        }
        return $return;
    }

    /**
     * Determine if the password hash needs to be rehashed according to the options provided
     *
     * If the answer is true, after validating the password using password_verify, rehash it.
     *
     * @param string $hash    The hash to test
     * @param int    $algo    The algorithm used for new password hashes
     * @param array  $options The options array passed to password_hash
     *
     * @return boolean True if the password needs to be rehashed.
     */
    function password_needs_rehash($hash, $algo, array $options = array()) {
        $info = password_get_info($hash);
        if ($info['algo'] !== (int) $algo) {
            return true;
        }
        switch ($algo) {
            case PASSWORD_BCRYPT:
                $cost = isset($options['cost']) ? (int) $options['cost'] : PASSWORD_BCRYPT_DEFAULT_COST;
                if ($cost !== $info['options']['cost']) {
                    return true;
                }
                break;
        }
        return false;
    }

    /**
     * Verify a password against a hash using a timing attack resistant approach
     *
     * @param string $password The password to verify
     * @param string $hash     The hash to verify against
     *
     * @return boolean If the password matches the hash
     */
    function password_verify($password, $hash) {
        if (!function_exists('crypt')) {
            trigger_error("Crypt must be loaded for password_verify to function", E_USER_WARNING);
            return false;
        }
        $ret = crypt($password, $hash);
        if (!is_string($ret) || PasswordCompat\binary\_strlen($ret) != PasswordCompat\binary\_strlen($hash) || PasswordCompat\binary\_strlen($ret) <= 13) {
            return false;
        }

        $status = 0;
        for ($i = 0; $i < PasswordCompat\binary\_strlen($ret); $i++) {
            $status |= (ord($ret[$i]) ^ ord($hash[$i]));
        }

        return $status === 0;
    }
} } namespace PasswordCompat\binary {

if (!function_exists('PasswordCompat\\binary\\_strlen')) {

    /**
     * Count the number of bytes in a string
     *
     * We cannot simply use strlen() for this, because it might be overwritten by the mbstring extension.
     * In this case, strlen() will count the number of *characters* based on the internal encoding. A
     * sequence of bytes might be regarded as a single multibyte character.
     *
     * @param string $binary_string The input string
     *
     * @internal
     * @return int The number of bytes
     */
    function _strlen($binary_string) {
        if (function_exists('mb_strlen')) {
            return mb_strlen($binary_string, '8bit');
        }
        return strlen($binary_string);
    }

    /**
     * Get a substring based on byte limits
     *
     * @see _strlen()
     *
     * @param string $binary_string The input string
     * @param int    $start
     * @param int    $length
     *
     * @internal
     * @return string The substring
     */
    function _substr($binary_string, $start, $length) {
        if (function_exists('mb_substr')) {
            return mb_substr($binary_string, $start, $length, '8bit');
        }
        return substr($binary_string, $start, $length);
    }

    /**
     * Check if current PHP version is compatible with the library
     *
     * @return boolean the check result
     */
    function check() {
        static $pass = NULL;

        if (is_null($pass)) {
            if (function_exists('crypt')) {
                $hash = '$2y$04$usesomesillystringfore7hnbRJHxXVLeakoG8K30oukPsA.ztMG';
                $test = crypt("password", $hash);
                $pass = $test == $hash;
            } else {
                $pass = false;
            }
        }
        return $pass;
    }

}}

Answer 1

Blowfish通常是一种更好的散列算法，下面的代码更容易实现（来源：http://php.net/manual/en/function.crypt.php）

<?php

function password_hash($password, $cost=11){
        /* To generate the salt, first generate enough random bytes. Because
         * base64 returns one character for each 6 bits, the we should generate
         * at least 22*6/8=16.5 bytes, so we generate 17. Then we get the first
         * 22 base64 characters
         */
        $salt=substr(base64_encode(openssl_random_pseudo_bytes(17)),0,22);
        /* As blowfish takes a salt with the alphabet ./A-Za-z0-9 we have to
         * replace any '+' in the base64 string with '.'. We don't have to do
         * anything about the '=', as this only occurs when the b64 string is
         * padded, which is always after the first 22 characters.
         */
        $salt=str_replace("+",".",$salt);
        /* Next, create a string that will be passed to crypt, containing all
         * of the settings, separated by dollar signs
         */
        $param='$'.implode('$',array(
                "2y", //select the most secure version of blowfish (>=PHP 5.3.7)
                str_pad($cost,2,"0",STR_PAD_LEFT), //add the cost in two digits
                $salt //add the salt
        ));

        //now do the actual hashing
        return crypt($password,$param);
}

/*
* Check the password against a hash generated by the generate_hash
* function.
*/
function password_verify($password, $hash){
        /* Regenerating the with an available hash as the options parameter should
         * produce the same hash if the same password is passed.
         */
        return crypt($password, $hash)==$hash;
}
?>

Answer 2

我有同样的问题。您的原始代码是正确的。

只需将服务器上的密码大小更改为255个字符（实际上应该是60个字符，建议为255个字符）。

Answer 3

您必须首先从数据库中获取哈希密码，然后将其与输入密码进行比较

无法比较/解密密码（PHP / Android）

3 个答案: