这里是一个PHP演示脚本,加密和解密数据:为什么mcrypt_encrypt()将二进制字符放在我的字符串末尾?
<?
$encryptionkey = 'h8y2p9d1';
$card_nbr = "1234";
echo "original card_nbr: $card_nbr <br>\n";
$card_nbr_encrypted=encrypt_data($card_nbr);
echo "card_nbr_encrypted: $card_nbr_encrypted <br>\n";
$card_nbr_decrypted=decrypt_data($card_nbr_encrypted);
echo "card_nbr_decrypted: $card_nbr_decrypted <br>\n";
$len=strlen($card_nbr_decrypted);
echo "length: $len <br>\n";
function encrypt_data($text){
global $encryptionkey;
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$encrypted_text = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $encryptionkey, $text, MCRYPT_MODE_ECB, $iv);
return $encrypted_text;
}
function decrypt_data($text){
global $encryptionkey;
$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
$iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
$decrypted_text = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $encryptionkey, $text, MCRYPT_MODE_ECB, $iv);
return $decrypted_text;
}
?>
的输出是:
original card_nbr: 1234
card_nbr_encrypted: vY¨(Z$<§G3-žÃ-Éù3Ý2Ê×rz¨VÛ
card_nbr_decrypted: 1234 (and 28 binary characters)
length: 32
输出被成功地解密,但28个二进制字符被添加到结束。在查看HTML源代码时,这在Firefox中很容易看到。 32的字符串长度也说明了这一点。有任何想法吗?
看看是否可以有任何帮助http://php.net/manual/en/function.base64-encode.php – 2012-03-20 05:33:34
@Mian_Khurram_Ijaz我不明白为什么会有所帮助 – Ben 2012-03-20 05:38:41
输出实际上是二进制格式所以为了使它安全跨网络base64_encode是有益的加密和解密工作正常,所以我想如果二进制字符是问题,然后使用base64 .. – 2012-03-20 05:41:20