Bash 脚本 - 如何将输出定向到 OpenVPN 中的多个输入?

Bash 脚本 - 如何将输出定向到 OpenVPN 中的多个输入?

所以我正在尝试编写一个脚本来简化连接到 OpenVPN 服务器的过程。

所以当我写时:

openvpn --config vpnbook-pl226-udp53.ovpn

它提示我输入用户名和密码:

Wed Apr  1 21:23:28 2020 OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] 
[EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Feb 20 2019
Wed Apr  1 21:23:28 2020 library versions: OpenSSL 1.1.1d  10 Sep 2019, LZO 2.10
Enter Auth Username:            
Enter Auth Password: 

在这里,我希望我的脚本自动将用户名和密码发送到 OpenVPN。

我进行了以下尝试:

尝试1:

{ echo "vpnbook"; echo "3vze4vd"; } | openvpn --config vpnbook-pl226-udp53.ovpn

尝试2:

echo -e "vpnbook\n3vze4vd" | openvpn --config vpnbook-pl226-udp53.ovpn

尝试3:

(echo $username; echo $password;) | openvpn --config vpnbook-pl226-udp53.ovpn

但它们都不起作用,我得到以下输出:

Wed Apr  1 21:38:14 2020 OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Feb 20 2019
Wed Apr  1 21:38:14 2020 library versions: OpenSSL 1.1.1d  10 Sep 2019, LZO 2.10

然后什么也没有发生。

有人可以给我一个提示吗?

答案1

您可以将用户名和密码添加到安全文件(只有所有者才能读取的文件)。auth-user-pass在 OpenVPN 文档中查找该通行证的详细信息 ( man openvpn):

cat > /path/to/secret <<'X'
myusername
verysecret
X
chmod u=rw,go= /path/to/secret

现在在您的 OpenVPN 配置文件中找到该auth-user-pass指令并像这样扩展它

auth-user-pass /path/to/secret

答案2

这看起来像是一份工作预计

为了演示的目的,我编写了一个简短的脚本来模拟 openvpn 命令的行为:

#! /usr/bin/env bash
echo "Wed Apr  1 21:23:28 2020 OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4]"
echo "[EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Feb 20 2019"
echo "Wed Apr  1 21:23:28 2020 library versions: OpenSSL 1.1.1d  10 Sep 2019, LZO 2.10"
read -r -p 'Enter Auth Username: ' USERNAME
read -rs -p 'Enter Auth Password: ' PASSWORD

echo
echo "username was $USERNAME"
echo "password was $PASSWORD"

这是一个响应这些提示的简短的期望脚本:

#! /usr/bin/env expect

spawn ./fakevpn --config vpnbook-pl226-udp53.ovpn

expect "Enter Auth Username: " { send Hello\r } # \r is the "return" character.
expect "Enter Auth Password: " { send World\r } # It simulates hitting the Enter key.
expect eof # This ensures expect won't exit until there's no more output.

输出如下所示:

[gnubeard@mothership: ~/vpn]$ ./vpn_expect
spawn ./fakevpn --config vpnbook-pl226-udp53.ovpn
Wed Apr  1 21:23:28 2020 OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4]
[EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Feb 20 2019
Wed Apr  1 21:23:28 2020 library versions: OpenSSL 1.1.1d  10 Sep 2019, LZO 2.10
Enter Auth Username: Hello
Enter Auth Password:
username was Hello
password was World

编辑:出于安全原因,roiama 的解决方案优于此解决方案。我将保留这一点,以防它对试图弄清楚如何自动化交互式命令的人有帮助。

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