How to Install Trusted-CGI on OpenBSD

Trusted-CGI is a tool for securing CGI scripts on web servers. It provides a hardened environment for running scripts, preventing common vulnerabilities like SQL injection and file inclusion attacks. In this tutorial, we will cover how to install Trusted-CGI on OpenBSD.

Prerequisites

Before we get started, make sure you have the following:

• An OpenBSD server
• A user account with sudo privileges

Step 1: Install Go

Trusted-CGI is implemented in Go, so we need to install the Go programming language first. We can do this using the following command:

sudo pkg_add go

This will install the latest version of Go from the OpenBSD package repository.

Step 2: Download Trusted-CGI

Next, we need to download the Trusted-CGI source code from GitHub. We can do this using the following command:

git clone https://github.com/reddec/trusted-cgi.git

This will create a directory named trusted-cgi in your current working directory.

Step 3: Build Trusted-CGI

Now that we have the source code, we need to build the Trusted-CGI binary. We can do this using the following commands:

cd trusted-cgi
go build

This will create a binary named trusted-cgi in the trusted-cgi directory.

Step 4: Install Trusted-CGI

To install Trusted-CGI system-wide, we can simply copy the binary to the /usr/local/sbin directory using the following command:

sudo cp trusted-cgi /usr/local/sbin/

This will make the trusted-cgi binary available system-wide.

Step 5: Configure Trusted-CGI

Lastly, we need to configure Trusted-CGI to run our CGI scripts. We can do this by creating a configuration file named trusted-cgi.conf in the /etc/httpd/conf/modules.d directory. Here is an example configuration file:

LoadModule cgi_module /usr/local/lib/httpd/modules/mod_cgi.so

<FilesMatch "\.cgi$">
  SetHandler cgi-script
  Options +ExecCGI
  AuthType Basic
  AuthName "Restricted Area"
  AuthUserFile /etc/httpd/passwd
  Require valid-user

  # Enable Trusted-CGI
  AddHandler cgi-script .cgi
  Action cgi-script /usr/local/sbin/trusted-cgi
</FilesMatch>

This configuration file enables CGI scripts, requires authentication, and enables Trusted-CGI for .cgi files.

Conclusion

That's it! You now have a secure environment for running CGI scripts on your OpenBSD server. Remember to always keep your server up-to-date with security patches, and ensure your web applications are always running the latest version.