通过PHP修改Linux或Unix口令的方法分享_PHP
需要的工具和安装:
你必须安装下面的工具和软件:
–修改口令的Shell脚本;
– Sudo访问权;
– Apache or Lighttpd web服务器;
– PHP服务端程序。
步骤1:安装可以修改用户口令的shell脚本
该脚本可以实际用于修改Linux用户的口令(已在Linux和FreeBSD测试)。
例子: shell脚本代码
#!/bin/sh # \ exec expect -f “$0″ ${1+”$@”} set password [lindex $argv 1] spawn passwd [lindex $argv 0] sleep 1 expect “assword:” send “$password\r” expect “assword:” send “$password\r” expect eof运行shell脚本(下载链接):
$ chpasswd username password下载该脚本,然后拷贝到你的web根目录或者web服务器的其它位置(用户可读):
$ cp chpasswd /var/www/或者,如果你使用Lighttpd web服务器:
$ cp chpasswd /home/lighttpd步骤2:通过sudo以root身份执行命令
Apache或Lighttpd web服务器进入后台运行后会马上使用非root权限。这样可以很好的防止口令修改,就像passwd命令需要root权限才能修改其它用户帐号的口令。
通常, Apache 2使用www-data用户, Lighttpd使用lighttpd用户(皆为普通用户,非root用户)。使用root用户登陆,然后执行下面的命令:
# visudo现在你的web服务器允许执行口令修改脚本(chpasswd)。如果你使用Apache web服务器,执行下面的命令:
www-data ALL=NOPASSWD: /var/www/chpasswd或者,如果你使用Lighttpd web服务器,执行下面的命令:
httpd ALL=NOPASSWD: /home/lighttpd/chpasswd保存和退出文件。
步骤3.创建一个基于PHP的接口
现在你需要写一个php脚本。这里有一个php脚本实例。你可以根据你的需要来修改。至少你需要正确设置好的shell脚本位置。打开php脚本和找到shellscript一行:
$shellscript = “sudo /home/lighttpd/chpasswd”;修改shellscript指向到正确的位置。PHP的源代码从这里下载:
步骤4:运行脚本
在你的web浏览器地址栏输入网地址,你将会看到用户名和口令提示:
如果口令修改成功,你会得到的确认提示:
由于一些原因,如果口令修改失败,你可以参考下面提示获得更多详细的错误信息:
步骤5:安全
◆永远不要通过http协议直接运行上面的脚本.而是使用https协议。
◆把脚本放入到受口令保护的目录。
◆永远不要信任用户的输入。上面的php脚本只是一个例子。在现实的生产环境中,你需要考虑采用更强大的用户输入确认。讨论PHP编程的安全超出了本文的范围。你可以参考一本好的PHP书籍或者使用你喜欢的搜索引擎搜索相关的网站。

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