<?php
namespace
app\index\controller;
class
Crypt{
private
$key
=
""
;
public
function
__construct(
$key
= null)
{
if
(!
is_null
(
$key
)) {
$this
->key =
$key
;
}
}
public
function
passport_encrypt(
$txt
)
{
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
urlencode(
base64_encode
(
$this
->passport_key(
$tmp
,
$this
->key)));
}
public
function
passport_decrypt(
$txt
)
{
$txt
=
$this
->passport_key(
base64_decode
(urldecode(
$txt
)),
$this
->key);
$tmp
=
''
;
for
(
$i
= 0;
$i
<
strlen
(
$txt
);
$i
++) {
$md5
=
$txt
[
$i
];
$tmp
.=
$txt
[++
$i
] ^
$md5
;
}
return
$tmp
;
}
private
function
passport_key(
$txt
,
$encrypt_key
)
{
$encrypt_key
= md5(
$encrypt_key
);
$ctr
= 0;
$tmp
=
''
;
for
(
$i
= 0;
$i
<
strlen
(
$txt
);
$i
++) {
$ctr
=
$ctr
==
strlen
(
$encrypt_key
) ? 0 :
$ctr
;
$tmp
.=
$txt
[
$i
] ^
$encrypt_key
[
$ctr
++];
}
return
$tmp
;
}
}