尝试使用以下策略实现加密和解密,但最终以随机字符结束。
class Crypt {
public static function encrypt($string, $account) {
// create a random initialization vector to use with CBC encoding
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$key = pack('H*', $account . $account);
$output = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $string, MCRYPT_MODE_CBC, $iv);
$output = $iv . $output;
$output = base64_encode($output);
$output = urlencode($output);
return $output;
}
public static function decrypt($token, $account) {
$ciphertext_dec = base64_decode($token);
// retrieves the IV, iv_size should be created using mcrypt_get_iv_size()
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
$iv_dec = substr($ciphertext_dec, 0, $iv_size);
// retrieves the cipher text (everything except the $iv_size in the front)
$ciphertext_dec = substr($ciphertext_dec, $iv_size);
$key = pack('H*', $account . $account);
$token = urldecode($token);
$output = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $ciphertext_dec, MCRYPT_MODE_CBC, $iv_dec);
$output = rtrim($output, "");
return $output;
}
}
无法获取准确的值,有时会解密,但我看到一些垃圾值,但大多只是随机字符。
$a = \Crypt::encrypt("MyPassword", "1974246e");
echo \Crypt::decrypt($a, "1974246e");
class Crypt {
public static function encrypt($data, $passphrase) {
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); //create a random initialization vector to use with CBC encoding
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$key = pack('H*', $passphrase . $passphrase);
return base64_encode($iv . mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_CBC, $iv));
}
public static function decrypt($data, $passphrase) {
$data = base64_decode($data);
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC); //retrieves the IV, iv_size should be created using mcrypt_get_iv_size()
$iv = substr($data, 0, $iv_size);
$data = substr($data, $iv_size); //retrieves the cipher text (everything except the $iv_size in the front)
$key = pack('H*', $passphrase . $passphrase);
return rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $data, MCRYPT_MODE_CBC, $iv), chr(0));
}
}
用法:
$pass = "MyPassword*&^*&^(*&^(";
$token = \Crypt::encrypt($pass, "1974246e8e8a479bb0233495e8a3ed12");
$answer = \Crypt::decrypt($token, "1974246e8e8a479bb0233495e8a3ed12");
echo $answer == $pass ? "yes" : "no";
答案 0 :(得分:2)
rtrim($str, chr(0));
(相反,您可能也希望将源字符串长度保存在加密结果中,因此您不会rtrim()
太多。)< / LI>
醇>
pack('H*', $account)
为什么$key
?也没必要。
Rijndael 128使用16字节密钥(128位),因此请确保您的密钥至少有那么长:
$key = $account . $account
会做,但显然不完美。 (如果它太短,mcrypt
会做类似的事情。)如果每个帐户都有自己的密码,那就太好了。 (更重要的是与app秘密相结合,但细节。)
rtrim()
和chr(0)
很好,因为你的源字符串不会有尾随的NUL字节。
I usually use these en/decrypt functions, or alike,但这些都有静态密钥/密钥,所以你的更好。
将加密的令牌发送到客户端:
$enc_token = Crypt::encrypt($token, $key);
// $enc_token might contain `/` and `+` and `=`
$url = 'page.php?token=' . urlencode($enc_token);