用变音符号加密和解密

Question

I have these code for encrypt and decrypt.

It works good for text (for example: "This is a text"), which is withnout diacritics (that means without : ěščřžýáíéúů). But I need encrypt and decrypt text with this special letters (with : ěščřžýáíéúů).

Can somebody help me, please?

Thank so much for every answer and help.

Have a nice day. M.

define ("ENCRYPTION_KEY", "QaY7e4d1c");
$string= "This is a text"; // -> this work alright 
//$string= "áýžřčšě";  I NEED THIS TEXT ENCRYPT AND DECRTYPT
echo $encrypted = encrypt($string, ENCRYPTION_KEY);
echo "<br />";
echo $decrypted = decrypt($encrypted, ENCRYPTION_KEY);
function encrypt ($pure_string,$encryption_key)
{
$iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH,MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size,MCRYPT_RAND);
$encrypted_string =             mcrypt_encrypt(MCRYPT_BLOWFISH,$encryption_key,utf8_encode($pure_string),MCRYPT_MODE_ECB,$iv);
return $encrypted_string;
} 
function decrypt ($encrypted_string,$encryption_key) 
{
$iv_size = mcrypt_get_iv_size(MCRYPT_BLOWFISH,MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size,MCRYPT_RAND);
$decrypted_string =     mcrypt_decrypt(MCRYPT_BLOWFISH,$encryption_key,$encrypted_string,MCRYPT_MODE_ECB ,$iv);
return $decrypted_string;
}

Answer 1

You're calling utf8_encode in your encryption function, but not calling utf8_decode when you decrypt, so your functions as they stand don't complement each other.

I'd recommend removing the call to utf8_encode entirely. mcrypt_encrypt doesn't care what encoding your string uses, so whatever you pass in will be what you get back out. Your script works fine for me if I remove it:

$encrypted_string = mcrypt_encrypt(MCRYPT_BLOWFISH, $encryption_key, $pure_string, MCRYPT_MODE_ECB, $iv);

I'd also suggest reading this: https://paragonie.com/blog/2015/05/if-you-re-typing-word-mcrypt-into-your-code-you-re-doing-it-wrong