域名授权与加密问题
现在有这么一套PHP系统,可以对指定的域名进行安装授权,未授权的域名则无法安装使用.
我的域名ipinge.com的安装授权文件(license.key)的内容为:
GcGuHiPneUPtjA$r%nTJH+HiG1fRXujm0HN9RGUxu5sJYnDtsfCgs3$r%n9bad236918$r%nSMn4GSa0ehXv3WRRf9cUTE+8$r%nT8euHnK1eEfq22gPLoEWSUy6$r%nTsj/GSq1eUa632pVfoJARx/q$r%nT8b8GyHheBrk2DhTLNQTSRi8$r%nR5H2SCLoehXqim0Af9NAGB/r$r%nHZT2HiHhehrpjjlULoZEGxq5$r%nTZSuTCHofEC93W1RItVIG0u8$r%nR5b3GnKzfkfoh2lRLYEURxzt$r%nRsL7EyTpdhG6i2xRKNYVSh/v$r%nSMT3Eiq0fEe1zjVZfYFeHUXj$r%nSZT3TCO3fxTvjW4BeYFBSEi2$r%nHsb4GSS3LhPo2mQELdJDGBq9$r%nTZarTybleUC5hmQEfocUSxO6$r%nHpT8G3XlKhTtimgGe9MVRhrv$r%nTMj3SCrmeES9jGwAI4BGSRm5$r%nGsOpTiboLBHoi2pRftQVRxrv$r%nTMWtHia0fxq92DkCe9VGTBm9$r%nSsj6GiG3fhrkiG8CeddHHx23$r%nGsH3GHXkehXo3W8ALIFHT0/t$r%nHcWpHXDhfBDv2G9VKocVSRrs$r%nHcP9TifjdkO+3GQBedxESxzo$r%nR5GqEyK3dhe5i2QOKtITTBO4$r%nGsmsHibieka+h2hSedxEGxnv$r%nTcT2HSPpLBDojm5TftVHT068$r%nHZatE3HlKRPpiWwEKIUSSB+3$r%nScf2TCLifBDqh2VWLdUVGh65$r%nTMj5EyDkfBLs32sBLocTS0jt$r%nGsj/Tne0f0a4iGgOf4ZCHEjq$r%nTsWpHHLmfRq9221RKNBETkvs$r%nS8j9TCroexO62GkAfNRBSxO5$r%nRpKrGyXkehvkh2VRLdNHR0+9$r%nHsH9HSu0KRu4jT5UfNIUGh7q$r%nHZL9HCTgexK6h2pSeNVEHUi+$r%nHcj/SCu3ehPk3GwCItBCT063$r%nSpL3T3LhLhe/imUPLYJBTxm8$r%nS8esEifodke/3WUCeNZDSx65$r%nR8D8SSO0fhfqiGwEI9BIG0vq$r%nSMX4EiXjeBPpjz0FLNdDSRzv$r%nT8T2TyvmK0G52DgOedIVSkm+$r%nGcGtGXDpdhG4j2gBLdNBRk/q$r%nR8X+HyHndhDk3GtSIoJHGkvv$r%nRsSqG3bgK0S42D1TLN1AHRy/$r%nT8D+GCOzfxO52GVVL91ASRu5$r%nHsn4HyLnehbu3G1VL9NHGh+2$r%nRsmpG3HjfhTkjGRSL9BHTBm+$r%nT5KtGivmfhS42mUPK4VEGx68$r%nHsT5SyO0ehfqiWsEK4UUGBq6$r%nT5b8GSO0fUa63WkFeNcVHBzv$r%nHpSpGHe0K0O4iz0Gf4EVH0jr$r%nSJb+T3Dhdha+jjkBLNREHEu3$r%nSJH4HiPpLhHvijgEftEVTxK5$r%nGsL5SSqzfUO6iW5Te9ZFSRi5
请问这种加密是如何实现的?
我现在要实现同样的功能,可以对指定域名生成license.key授权文件.
------解决方案--------------------
“生成授权文件”并不是要点,要点在于“如何使用授权文件”。
一般而言,应该是你那套“PHP系统”在什么地方来读取这个授权文件,从里面提取出指定的域名,再跟实际运行时的主机域名相比较。
至于这个授权文件本身,无非是对某些授权信息(当然包括指定的域名,也许会有用户信息、授权时间限制等等)进行某种可逆的编码转换。如果你的“PHP系统”没有经过混淆加密的话,读一下源程序,这些就很容易搞清楚了。
------解决方案--------------------
顶楼上,
最好读读php代码操作key文件那部分
不过我估计你php代码肯定混淆过了吧
zend很方便解密,百度一下就有好多解密工具
Ioncube加密 就麻烦了,前段时间研究过,国内国外转了个遍,没啥进展

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。


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