代码如下:
PHP:
复制代码 代码如下:
-
-
- // 说明：PHP 写的加密函数,支持私人密钥
- // 整理：https://www.jb51.net
-
- function
keyED(
$txt
,$encrypt_key
)
- {
- $encrypt_key
= md5
(
$encrypt_key
)
; - $ctr
=0
; - $tmp
= ""
; - for
(
$i
=0
;$i
)
;$i
++)
- {
- if
(
$ctr
==strlen
(
$encrypt_key
)
)
$ctr
=0
; - $tmp
.= substr
(
$txt
,$i
,1
)
^ substr
(
$encrypt_key
,$ctr
,1
)
; - $ctr
++; - }
- return
$tmp
; - }
-
- function
encrypt(
$txt
,$key
)
- {
- srand
(
(
double)
microtime
(
)
*1000000
)
; - $encrypt_key
= md5
(
rand
(
0
,32000
)
)
; - $ctr
=0
; - $tmp
= ""
; - for
(
$i
=0
;$i
)
;$i
++)
- {
- if
(
$ctr
==strlen
(
$encrypt_key
)
)
$ctr
=0
; - $tmp
.= substr
(
$encrypt_key
,$ctr
,1
)
. (
substr
(
$txt
,$i
,1
)
^ substr
(
$encrypt_key
,$ctr
,1
)
)
; - $ctr
++; - }
- return
keyED(
$tmp
,$key
)
; - }
-
- function
decrypt(
$txt
,$key
)
- {
- $txt
= keyED(
$txt
,$key
)
; - $tmp
= ""
; - for
(
$i
=0
;$i
)
;$i
++)
- {
- $md5
= substr
(
$txt
,$i
,1
)
; - $i
++; - $tmp
.= (
substr
(
$txt
,$i
,1
)
^ $md5
)
; - }
- return
$tmp
; - }
-
- $key
= "www.yitu.org"
; - $string
= "我是加密字符"
; -
- // encrypt $string, and store it in $enc_text
- $enc_text
= encrypt(
$string
,$key
)
; -
- // decrypt the encrypted text $enc_text, and store it in $dec_text
- $dec_text
= decrypt(
$enc_text
,$key
)
; -
- print
"加密的 text : $enc_text
"
; - print
"解密的 text : $dec_text
"
; - ?>
-
每一次加密后的结果是不一样的,大大加强了密码的安全性.
