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<?php
function passport_encrypt($txt, $key) {
srand((double)microtime() * 1000000);
$encrypt_key = md5(rand(0, 32000));
$ctr = 0;
$tmp = '';
for($i = 0;$i < strlen($txt); $i++) {
   $ctr = $ctr == strlen($encrypt_key) ? 0 : $ctr;
   $tmp .= $encrypt_key[$ctr].($txt[$i] ^ $encrypt_key[$ctr++]);
}
return base64_encode(passport_key($tmp, $key));
}
function passport_decrypt($txt, $key) {
$txt = passport_key(base64_decode($txt), $key);
$tmp = '';
for($i = 0;$i < strlen($txt); $i++) {
   $md5 = $txt[$i];
   $tmp .= $txt[++$i] ^ $md5;
}
return $tmp;
}
function passport_key($txt, $encrypt_key) {
$encrypt_key = md5($encrypt_key);
$ctr = 0;
$t ......

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±íÍ·Îļþ #include<stdlib.h>
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mian()
{
char *p;
if((p = getenv(“USER”)))
printf(“USER=%s\n”,p);
}
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main()
{
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if((p = getenv(&ld ......

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·¶Àý #include<stdlib.h>
mian()
{
char *p;
if((p = getenv(“USER”)))
printf(“USER=%s\n”,p);
}
Ö´ÐÐ USER = root
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