简单的 PHP 加密/解密 (Mcrypt, AES)

Question

我正在寻找使用 Mcrypt 的 AES 的简单但加密功能强大的 PHP 实现。

希望将其归结为一对简单的函数，$garble = encrypt($key, $payload) 和 $payload = decrypt($key, $garble)。

Answer 1

我最近正在学习这个主题，并将此答案发布为社区 wiki 以分享我的知识，有待更正。

• Mcrypt Documentation

据我了解，可以使用 Mcrypt 实现 AES，并使用以下常量作为选项：

MCRYPT_RIJNDAEL_128     // as cipher
MCRYPT_MODE_CBC         // as mode
MCRYPT_MODE_DEV_URANDOM // as random source (for IV)

在加密期间，应使用随机的非秘密初始化向量 (IV) 来随机化每个加密（因此相同的加密永远不会产生相同的乱码）。此 IV 应附加到加密结果中，以便以后在解密期间使用。

为了简单的兼容性，结果应该是 Base 64 编码的。

实施：

<?php

define('IV_SIZE', mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC));

function encrypt ($key, $payload) {
  $iv = mcrypt_create_iv(IV_SIZE, MCRYPT_DEV_URANDOM);
  $crypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $payload, MCRYPT_MODE_CBC, $iv);
  $combo = $iv . $crypt;
  $garble = base64_encode($iv . $crypt);
  return $garble;
}

function decrypt ($key, $garble) {
  $combo = base64_decode($garble);
  $iv = substr($combo, 0, IV_SIZE);
  $crypt = substr($combo, IV_SIZE, strlen($combo));
  $payload = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $crypt, MCRYPT_MODE_CBC, $iv);
  return $payload;
}


//:::::::::::: TESTING ::::::::::::


$key = "secret-key-is-secret";
$payload = "In 1435 the abbey came into conflict with the townspeople of Bamberg and was plundered.";

// ENCRYPTION
$garble = encrypt($key, $payload);

// DECRYPTION
$end_result = decrypt($key, $garble);

// Outputting Results
echo "Encrypted: ", var_dump($garble), "<br/><br/>";
echo "Decrypted: ", var_dump($end_result);

?>

输出如下所示：

Encrypted: string(152) "4dZcfPgS9DRldq+2pzvi7oAth/baXQOrMmt42la06ZkcmdQATG8mfO+t233MyUXSPYyjnmFMLwwHxpYiDmxvkKvRjLc0qPFfuIG1VrVon5EFxXEFqY6dZnApeE2sRKd2iv8m+DiiiykXBZ+LtRMUCw==" 

Decrypted: string(96) "In 1435 the abbey came into conflict with the townspeople of Bamberg and was plundered."

Answer 2

简单易用：

$text= 'Hi, i am sentence';
$secret = 'RaNDoM cHars!@#$%%^';

$encrypted = simple_encrypt($text,           $secret);
$decrypted = simple_decrypt($encrypted_text, $secret);

代码：

function simple_encrypt($text_to_encrypt, $salt)    { 
    return trim(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_128,  pack('H*', $salt), $text_to_encrypt, MCRYPT_MODE_CBC, $iv =  mcrypt_create_iv($iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), MCRYPT_RAND))));
}

function simple_decrypt($encrypted, $salt)  { 
    return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, pack('H*', $salt), base64_decode($encrypted), MCRYPT_MODE_CBC, $iv = mcrypt_create_iv($iv_size=mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC), MCRYPT_RAND))); 
}

Answer 3

添加清除控制字符 (�) 的功能。

function clean($string) {
return preg_replace('/[\x00-\x09\x0B\x0C\x0E-\x1F\x7F]/', '', $string);

}

echo "Decrypted: ", clean($end_result);

Sentrapedagang.com

Answer 4

Mycrypt 类

尝试使用这个类。这里。您需要传递的只是键和字符串。

class MCrypt
{
    const iv = 'fedcba9876543210';

    /**
 * @param string $str
 * @param bool $isBinary whether to encrypt as binary or not. Default is: false
 * @return string Encrypted data
 */
public static function encrypt($str, $key="0123456789abcdef", $isBinary = false)
{
    $iv = self::iv;
    $str = $isBinary ? $str : utf8_decode($str);
    $td = mcrypt_module_open('rijndael-128', ' ', 'cbc', $iv);
    mcrypt_generic_init($td, $key, $iv);
    $encrypted = mcrypt_generic($td, $str);
    mcrypt_generic_deinit($td);
    mcrypt_module_close($td);
    return $isBinary ? $encrypted : bin2hex($encrypted);
}

/**
 * @param string $code
 * @param bool $isBinary whether to decrypt as binary or not. Default is: false
 * @return string Decrypted data
 */
public static function decrypt($code, $key="0123456789abcdef", $isBinary = false)
{
    $code = $isBinary ? $code : self::hex2bin($code);
    $iv = self::iv;
    $td = mcrypt_module_open('rijndael-128', ' ', 'cbc', $iv);
    mcrypt_generic_init($td, $key, $iv);
    $decrypted = mdecrypt_generic($td, $code);
    mcrypt_generic_deinit($td);
    mcrypt_module_close($td);
    return $isBinary ? trim($decrypted) : utf8_encode(trim($decrypted));
}

private static function hex2bin($hexdata)
{
    $bindata = '';
    for ($i = 0; $i < strlen($hexdata); $i += 2) {
        $bindata .= chr(hexdec(substr($hexdata, $i, 2)));
    }
    return $bindata;
}
   }

如何使用

 $var = json_encode(['name'=>['Savatar', 'Flash']]);
 $encrypted = MCrypt::encrypt();
 $decrypted = MCrypt::decrypt($encrypted);