php加密解密处理类--参 考:Discuz论坛的passpor_PHP教程
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2022-06-12 17:45:16
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/*===========================================================
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= 版权协议:
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= GPL (The GNU GENERAL PUBLIC LICENSE Version 2, June 1991)
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=------------------------------------------------------------
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= 文件名称:cls.sys_crypt.php
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= 摘 要:php加密解密处理类
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= 版 本:1.0
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= 参 考:Discuz论坛的passport相关函数
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=------------------------------------------------------------
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= Script Written By PHPWMS项目组
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= 最后更新:xinge
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= 最后日期:2007-12-09
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============================================================*/
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class
SysCrypt {
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private
$crypt_key
;
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// 构造函数
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public
function
__construct(
$crypt_key
) {
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$this
-> crypt_key =
$crypt_key
;
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}
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public
function
php_encrypt(
$txt
) {
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srand((double)microtime() * 1000000);
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$encrypt_key
= md5(rand(0,32000));
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$ctr
= 0;
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$tmp
=
''
;
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for
(
$i
= 0;
$i
strlen
(
$txt
);
$i
++) {
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$ctr
=
$ctr
==
strlen
(
$encrypt_key
) ? 0 :
$ctr
;
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$tmp
.=
$encrypt_key
[
$ctr
].(
$txt
[
$i
]^
$encrypt_key
[
$ctr
++]);
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}
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return
base64_encode
(self::__key(
$tmp
,
$this
-> crypt_key));
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}
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public
function
php_decrypt(
$txt
) {
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$txt
= self::__key(
base64_decode
(
$txt
),
$this
-> crypt_key);
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$tmp
=
''
;
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for
(
$i
= 0;
$i
strlen
(
$txt
);
$i
++) {
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$md5
=
$txt
[
$i
];
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$tmp
.=
$txt
[++
$i
] ^
$md5
;
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}
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return
$tmp
;
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}
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private
function
__key(
$txt
,
$encrypt_key
) {
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$encrypt_key
= md5(
$encrypt_key
);
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$ctr
= 0;
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$tmp
=
''
;
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for
(
$i
= 0;
$i
strlen
(
$txt
);
$i
++) {
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$ctr
=
$ctr
==
strlen
(
$encrypt_key
) ? 0 :
$ctr
;
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$tmp
.=
$txt
[
$i
] ^
$encrypt_key
[
$ctr
++];
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}
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return
$tmp
;
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}
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public
function
__destruct() {
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$this
-> crypt_key = null;
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}
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}
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$sc
=
new
SysCrypt(
'phpwms'
);
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$text
=
'110'
;
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print(
$sc
-> php_encrypt(
$text
));
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print(
'
'
);
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print(
$sc
-> php_decrypt(
$sc
-> php_encrypt(
$text
)));
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?>
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