Software & AppsOperating SystemLinux

How To Build Curl with the Latest OpenSSL

Ubuntu 14

In this article, we will delve into the process of building curl with the latest OpenSSL version. This is a common requirement for system administrators and developers who want to ensure that they are using the most secure version of OpenSSL with curl.

Quick Answer

To build curl with the latest OpenSSL, you need to first build and install the latest version of OpenSSL. Then, you can proceed to build and install curl with the newly installed OpenSSL version. Finally, verify the installation by checking the OpenSSL and curl versions.

Prerequisites

Before we begin, ensure that you have the following:

  • Basic understanding of the Linux command line.
  • Access to a Linux system.
  • Sufficient privileges to install software on the system.

Overview of Curl and OpenSSL

Curl is a command-line tool for transferring data using various protocols. It is open-source and can be used on a wide variety of operating systems.

OpenSSL is a robust, commercial-grade, and full-featured toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols. It is used to secure communications over computer networks.

Step 1: Build and Install OpenSSL

The first step is to build and install the latest version of OpenSSL. Here are the commands you need to run:

./config
make
sudo make install
sudo ln -sf /usr/local/ssl/bin/openssl `which openssl`

Let’s break down these commands:

  • ./config: This command configures the OpenSSL source code for building.
  • make: This command compiles the source code.
  • sudo make install: This command installs the compiled code to the system.
  • sudo ln -sf /usr/local/ssl/bin/openssl which openssl“: This command creates a symbolic link to the newly installed OpenSSL binary.

Step 2: Build and Install Curl

The next step is to build and install curl with the newly installed OpenSSL version. Here are the commands you need to run:

./configure --with-ssl
make
sudo make install

Here’s what these commands do:

  • ./configure --with-ssl: This command configures the curl source code for building with SSL support.
  • make: This command compiles the source code.
  • sudo make install: This command installs the compiled code to the system.

Step 3: Verify the Installation

After completing the installation, you can check the OpenSSL and curl versions to verify if the latest version is being used.

To check the OpenSSL version, run:

openssl version

To check the curl version, run:

curl --version

If the curl version still shows the old OpenSSL version, there are a few additional options you can try:

  1. Specify the path to the OpenSSL include directory:
./configure --with-ssl=/usr/local/ssl/include/openssl
  1. Set the PKG_CONFIG_PATH environment variable:
PKG_CONFIG_PATH=/usr/local/ssl/lib/pkgconfig ./configure
  1. Use the --with-libssl-prefix option:
./configure --with-ssl --with-libssl-prefix=/usr/local/ssl

Try each of these options one by one and rebuild curl to see if it picks up the latest OpenSSL version.

Conclusion

Building curl with the latest OpenSSL version can be a bit tricky, but with the right commands and options, you can get it done. Remember to always use the latest versions of both curl and OpenSSL to ensure the highest level of security. If you encounter any issues, don’t hesitate to seek help from the respective communities.

What is the purpose of building curl with the latest OpenSSL version?

Building curl with the latest OpenSSL version ensures that you are using the most up-to-date and secure encryption protocols for transferring data over computer networks.

Can I build curl with the latest OpenSSL version on Windows?

The steps provided in this article are specifically for building curl with OpenSSL on Linux systems. However, you can also build curl with OpenSSL on Windows using similar steps, but the commands and paths may be different.

Leave a Comment

Your email address will not be published. Required fields are marked *