Jun
18
使用PHP的mcrypt模块进行DES加密/解密
网上摘下来的代码,没什么好说的了(因为那一堆 mcrypt_* 函数太乱了,用就是了):
转载请注明出自 ,如是转载文则注明原出处,谢谢:)
RSS订阅地址: https://www.felix021.com/blog/feed.php 。
<?php
class DES
{
public static function pkcs5_pad ($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
public static function pkcs5_unpad($text) {
$pad = ord($text{strlen($text)-1});
if ($pad > strlen($text)) {
return false;
}
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) {
return false;
}
return substr($text, 0, -1 * $pad);
}
public static function encrypt($key, $data) {
$size = mcrypt_get_block_size('des', 'ecb');
$data = DES::pkcs5_pad($data, $size);
$td = mcrypt_module_open('des', '', 'ecb', '');
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
@mcrypt_generic_init($td, $key, $iv);
$data = mcrypt_generic($td, $data);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $data;
}
public static function decrypt($key, $data) {
$td = mcrypt_module_open('des','','ecb','');
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
$ks = mcrypt_enc_get_key_size($td);
@mcrypt_generic_init($td, $key, $iv);
$decrypted = mdecrypt_generic($td, $data);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$result = DES::pkcs5_unpad($decrypted);
return $result;
}
}
/* test code
$in = "04fMaWegkH1/BL9CNYxgusFpYK8wdraBX06mPiRmxJP+uVm31GQvyw==";
$des = base64_decode($in);
echo DES::decrypt("12345678", $des);
echo "\n";
$in = "cea3e8e1659582206e0be32539729e9f";
$des = DES::encrypt("12345678", $in);
$out = base64_encode($des);
echo $out;
echo "\n";
// */
?>
class DES
{
public static function pkcs5_pad ($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
public static function pkcs5_unpad($text) {
$pad = ord($text{strlen($text)-1});
if ($pad > strlen($text)) {
return false;
}
if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) {
return false;
}
return substr($text, 0, -1 * $pad);
}
public static function encrypt($key, $data) {
$size = mcrypt_get_block_size('des', 'ecb');
$data = DES::pkcs5_pad($data, $size);
$td = mcrypt_module_open('des', '', 'ecb', '');
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
@mcrypt_generic_init($td, $key, $iv);
$data = mcrypt_generic($td, $data);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $data;
}
public static function decrypt($key, $data) {
$td = mcrypt_module_open('des','','ecb','');
$iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
$ks = mcrypt_enc_get_key_size($td);
@mcrypt_generic_init($td, $key, $iv);
$decrypted = mdecrypt_generic($td, $data);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$result = DES::pkcs5_unpad($decrypted);
return $result;
}
}
/* test code
$in = "04fMaWegkH1/BL9CNYxgusFpYK8wdraBX06mPiRmxJP+uVm31GQvyw==";
$des = base64_decode($in);
echo DES::decrypt("12345678", $des);
echo "\n";
$in = "cea3e8e1659582206e0be32539729e9f";
$des = DES::encrypt("12345678", $in);
$out = base64_encode($des);
echo $out;
echo "\n";
// */
?>
欢迎扫码关注:
转载请注明出自 ,如是转载文则注明原出处,谢谢:)
RSS订阅地址: https://www.felix021.com/blog/feed.php 。