我们利用Serv-U的obdc功能，可以把FTP用户信息存在数据库中，这样对Web操作方便了很多，下面是在线更改密码的列子，数据库为Access，表和字段的设计请参考Serv-U的帮助文件。
加密算法为随机码与MD5 32 位加密，例如：
两个随机字母：ab
用户输入密码：123456
生成的密码为：ab + MD5(ab123456)
参考：手把手教你使用 Serv-U的ODBC功能
补充：md5返回为32位的大写字符
提示：代码仅实现更改密码的功能，并不一定完全符合或达到您的需求。
以下是代码片段：
<!--#include file='conn.asp'-->
<!--#include file='include/md5.asp'-->
<%
dim act,UserName,OldPassword,NewPassword,reNewPassword
act = Request.form("act")
if act = "update" then
UserName = Request.form("UserName")
OldPassword = Request.form("OldPassword")
NewPassword = Request.form("NewPassword")
reNewPassword = Request.form("reNewPassword")
UserName = Replace(UserName,"'","'")
if len(UserName)<1 or len(OldPassword)<1 or len(NewPassword)<1 or len(reNewPassword)<1 then
alert("表单没有填写完整")
end if
if trim(NewPassword)<>trim(reNewPassword) then
alert("密码与确认密码不一样")
end if
Sql0 = "select top 1 name,[password] from [useraccounts] where name = '"& UserName &"'"
set rs0 = conn.execute(Sql0)
if rs0.eof and rs0.bof then
alert("用户名不存在")
else
dbname = rs0("name")
dbpassword = rs0("password")
end if
cdbpassword = left(dbpassword,2) & md5(left(dbpassword,2) & OldPassword)
if trim(cdbpassword) <> trim(dbpassword) then
alert("密码错误")
else
rndstr = MyRandc(2) '两位随机字母
newdbpassword = rndstr & md5(rndstr & NewPassword)
sql2 = "update [useraccounts] set [password] = '"& newdbpassword &"' where name='"& UserName &"'"
conn.execute(sql2)
alert("密码已经更改，可能要几钟后才能生效")
end if
end if
function alert(x)
response.write "<script language='JavaScript'>alert('"& replace(x,"""","""") &"');history.go(-1);</script>"
conn.close
set conn = nothing
response.end
end function
function MyRandc(n)'生成随机字符，n为字符的个数
thechr = ""
for i=1 to n
Randomize timer
zNum = cint(25*Rnd)
if zNum mod 2 = 0 then
zNum = zNum + 97
else
zNum = zNum + 65
end if
thechr = thechr & chr(zNum)
next
MyRandc = thechr
end function
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<META NAME="Author" CONTENT="海娃(51windows)">
<META NAME="Keywords" CONTENT="http://www.51windows.Net">
<title>更改FTP (Serv-U) 密码 - 51windows.net</title>
</head>
<body>
<form method="POST" action="" name="form" autocomplete="off">
<input type="hidden" name="act" value="update">
<div align="center">
<center>
<table border="0" width="480" cellpadding="2" cellspacing="1" class="table" style="border: 1 solid #336699;font-size:14px;">
<tr>
<td width="100%" align="center" colspan="2" class="title" style="background:#336699;color:#FFFFFF;">更改FTP (Serv-U) 密码</td>
</tr>
<tr>
<td width="30%" align="left">用户名[√]：</td>
<td width="70%"><input class="input" type="text" maxlength=20 name="UserName" size="25" value="" /> (FTP登陆用户名)</td>
</tr>
<tr>
<td width="30%" align="left">旧密码[√]：</td>
<td width="70%"><input class="input" type="password" maxlength=20 name="OldPassword" size="25" value="" /> (必须输入旧密码)</td>
</tr>
<tr>
<td width="30%" align="left">新密码[√]：</td>
<td width="70%"><input class="input" type="password" name="NewPassword" size="25" value="" /> (输入新密码)</td>
</tr>
<tr>
<td width="30%" align="left">确认[√]：</td>
<td width="70%"><input class="input" type="password" name="reNewPassword" size="25" value="" /> (再次输入新密码)</td>
</tr>
<tr>
<td width="100%" height="30" align="center" colspan="2"><input style="font-size:14px;" type="submit" size="10" value="确 定" class=button></td>
</tr>
</table>
</center>
</div>
</html>
<%
set rs = nothing
conn.close
set conn = nothing
%>
仔细研究一下，我们能够很容易的移植到php对serv-u的控制中去。