nginx可以为网站或者目录设置密码认证，密码认证必须是要加密的。使用apache的htpasswd来创建密码！

使用htpasswd创建密码文件

htpasswd -c   第一次创建时使用-c，如果已存在会清空文件内容
                -m  表示以md5格式加密存放

                -D   删除用户

1、测试有无htpasswd命令

[root@localhost conf]# htpasswd
-bash: htpasswd: command not found         

  如果没有此命令可以使用yum -y install httpd来实现

  使用示例：htpasswd -c -m /etc/httpd/conf/htpasswd 用户名，以此输入密码即可

  如不想安装httpd可以使用下面两种方法实现

  1.1、使用perl脚本实现，代码如下

[root@localhost conf]#vi auth_user.pl

#! /usr/bin/perl -w  
#filename: auth_ftp_user.pl  
use strict;  
#  
print "#example: user:passwd\n";  
while () {  
    exit if ($_ =~/^\n/);  
    chomp;  
    (my $user, my $pass) = split /:/, $_, 2;  
    my $crypt = crypt $pass, '$1$' . gensalt(8);  
    print "$user:$crypt\n";  
}  
sub gensalt {  
    my $count = shift;  
    my @salt = ('.', '/', 0 .. 9, 'A' .. 'Z', 'a' .. 'z');  
    my $s;  
    $s .= $salt[rand @salt] for (1 .. $count);  
    return $s;  
} 
脚本创建完成后为脚本添加可执行权限
chmod +x auth_user.pl
脚本使用方法
./auth_user.pl
user:password
将生成的用户名密码粘贴到/usr/local/nginx/conf/nginx_passwd文件中

     1.2、创建类htpasswd脚本文件

wget -c soft.vpser.net/lnmp/ext/htpasswd.sh
下载完成后执行htpasswd文件
[root@localhost passwd]# cat htpasswd.sh
#!/bin/bash
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH

echo "====================================="
echo "# A tool like htpasswd for Nginx    #"
echo "#-----------------------------------#"
echo "# Author:Licess http://www.lnmp.org #"
echo "====================================="

#set UserName

        username=""
        read -p "Please input UserName:" username
        if [ "$username" = "" ]; then
                echo "Error:UserName can't be NULL!"
                exit 1
        fi
        echo "==========================="
        echo "UserName was: $username"
        echo "==========================="

#set password

        unpassword=""
        read -p "Please input the Password:" unpassword
        if [ "$unpassword" = "" ]; then
                echo "Error:Password can't be NULL!"
                exit 1
        fi
        echo "==========================="
        echo "Password was: $unpassword"
        echo "==========================="
password=$(perl -e 'print crypt($ARGV[0], "pwdsalt")' $unpassword)

#set htpasswd file

        htfile=""
        read -p "Please input Auth filename:" htfile
        if [ "$htfile" = "" ]; then
                echo "Error:Auth filename can't be NULL!"
                exit 1
        fi
        echo "==========================="
        echo "Auth File: /usr/local/nginx/conf/$htfile"
        echo "==========================="

        get_char()
        {
        SAVEDSTTY=`stty -g`
        stty -echo
        stty cbreak
        dd if=/dev/tty bs=1 count=1 2> /dev/null
        stty -raw
        stty echo
        stty $SAVEDSTTY
        }
        echo ""
        echo "Press any key to Creat...or Press Ctrl+c to cancel"
        char=`get_char`

if [ ! -f /usr/local/nginx/conf/$htfile.conf ]; then
  echo "Create Auth file......"
cat >/usr/local/nginx/conf/$htfile.conf<$username:$password
eof
echo "Create Auth file successful,auth file path:/usr/local/nginx/conf/$htfile.conf."
else
        echo "File already exists,please run this script again."
        exit 1
按照提示输入用户名密码及认证文件名，脚本既会生成认证文件。


2、在nginx配置文件中添加认证配置

   2.1、如果是给网站添加认证，只需把认证语句添加到server段即可

server  
{  
    listen 80;  
    server_name www.test.com;  
    root /home/src;  
    index index.html index.htm index.php;  
    auth_basic "input you user name and password";  
    auth_basic_user_file /usr/local/nginx/conf/vhost/nginx_passwd;   


   2.2、如果是给网站目录添加认证，在一个单独的location中，并且在该location中嵌套一个解释php的location，否则php文件不会执行并且会被下载。auth_basic在嵌套的location之后。

server  
{  
    listen 80;  
    server_name www.test.com;   
    root /home/src;      
    index index.html index.htm index.php;  
    location ~ ^/admin/.*  
    {  
    location ~ \.php$  
    {  
        fastcgi_pass 127.0.0.1:9000;  
        fastcgi_index index.php;  
        include fastcgi_params;  
    }  

    auth_basic "input you user name and password";   
    auth_basic_user_file /usr/local/nginx/conf/vhost/nginx_passwd;  

    }  
    location ~ .php$  
    {  
        fastcgi_pass 127.0.0.1:9000;  
        fastcgi_index index.php;  
        include fastcgi_params;  
    }   


添加完成后重启nginx即可