How do I install OpenSSL 1.0.2 version in Debian (Raspberry Pi3) OS. It just installs OpenSSL 1.0.1 automatically. I require version later than this i.e. 1.0.2* which supports DTLS.

Please help how to install latest version

  • I know Debian's jessie-backports includes 1.0.2 - never tried installing it on a pi, but you could try adding deb http://ftp.debian.org/debian jessie-backports main to /etc/apt/sources.list – Jaromanda X May 7 '17 at 1:52
  • My question is how do I upgrade to new openssl version (i.e.latest openssl version 1.0.2* or higher which supports DTLS) ? My current setting in Pi3 is /usr/lib/arm-linux-gnueabihf/openssl-1.0.0. It seems this version does not support DTLS as I am getting 'DTLS_Server_method' not found as below: AttributeError: /usr/lib/arm-linux-gnueabihf/libssl.so.1.0.0: undefined symbol: DTLS_server_method. – Jyoti Raj Sharma May 10 '17 at 17:03
  • Continue..... step 1: I put 'deb ftp.debian.org/debian jessie-backports main' inside /etc/apt/source.list step 2: sudo apt-get update step 3: apt-get -t jessie-backports install "package" Question 1: what should be the package name ? I am not able to find. Question 2: After that I tried installing 'sudo apt-get install openssl' but still install openssl.1.0.0 which does not have DTLS method. Question 3: How do I upgrade to new openssl version (i.e.latest openssl version 1.0.2* or higher which supports DTLS) ? – Jyoti Raj Sharma May 10 '17 at 17:14
  • on second thoughts, don't use debian backports, because they'll probably break something anyway – Jaromanda X May 10 '17 at 23:58

If you really need it but can't obtain it from the repos, you could always try compiling from source. Install git and build-essentials (if you don't have it already) and run the following:

git clone git://git.openssl.org/openssl.git --depth 1
cd openssl
make test
sudo make install

NOTE: On some distros (e.g. Ubuntu 19.10), you may need to run the config step as ./config --prefix=/usr. This puts the compiled binaries in /usr/bin, not /usr/local/bin.

  • Thanks for your comment. Will this method dynamically link to /usr/bin/openssl ? Last time, I installed similarly but after installation, I could not see libssl.1.0.0 when I checked for $ ldd /usr/bin/openssl. Please help to confirm. – Jyoti Raj Sharma May 9 '17 at 19:39
  • 1
    It probably puts it in /usr/local/bin/openssl, that is a standard for user-compiled applications. If you really need it in /usr, replace ./config with ./config --prefix=/usr – randomdude999 May 10 '17 at 20:23
  • I want to install inside /usr/lib/arm-linux-gnueabhihf as my Raspberry pi is taking openssl lib from this path. Will the following command work ? $ ./config --prefix=/usr/lib/arm-linux-gnueabihf --openssldir=/usr/lib/arm-linux-gnueabihf – Jyoti Raj Sharma May 11 '17 at 4:00
  • I'm not really sure. The prefix will set the main prefix, setting that to /usr/lib/arm-linux-gnueabihf will create subfolders bin, lib and share inside it. That is probably not what you want. If the distibution openssl puts the libs in /usr/lib/arm-linux-whatever then the self-compiled version will probably also do that. – randomdude999 May 11 '17 at 4:28
  • @randomdude999 you should add a note about the install prefix. Things worked for me when I set the prefix to /usr. – VarunAgrawal Jun 22 '19 at 16:58

Debian jessie-backports would contain the required openssl with version 1.0.2. However you should not directly install the package from jessie-backports since it was compiled for ARMv7-A while Raspbian is compiled for ARMv6. Luckily, you can get the source from jessie-backports and build packages with the proper compiler options for Raspbian.

Using the cross compilation toolchain described here you can proceed as follows:

Add jessie-backports sources to your apt sources list:

echo "deb-src http://httpredir.debian.org/debian jessie-backports main contrib non-free" | sudo tee /etc/apt/sources.list.d/jessie-backports.list
sudo apt update

Get the openssl source code from jessie-backports:

apt-get source openssl/jessie-backports

Build the openssl Debian packages:

cd openssl-1.0.2k/
export DEB_BUILD_OPTIONS=nocheck; debuild -us -uc -aarmhf

Copy the resulting packages to your Raspberry Pi:

scp libssl1.0.0_1.0.2k-1~bpo8+1_armhf.deb  pi@raspberrypi:
scp openssl_1.0.2k-1~bpo8+1_armhf.deb pi@raspberrypi:

Enter the Raspberry Pi and install the new packages:

ssh pi@raspberrypi
sudo dpkg -i libssl1.0.0_1.0.2k-1~bpo8+1_armhf.deb
sudo dpkg -i openssl_1.0.2k-1~bpo8+1_armhf.deb


  • Do not forget to recompile your openssl packages as soon as there are security updates!
  • Installing Debian packages is a lot cleaner than doing a make install.
  • If you do not want to install a cross compilation toolchain, you can also do the above steps directly on a Raspberry Pi. On the Pi 3 Model B the compilation takes about 35 minutes.
  • I will try with this method. Thanks for your comment. – Jyoti Raj Sharma May 15 '17 at 18:06
  • Is it safe to use debian backport? The first post suggests not to use backport as it might break something. Please suggest. – Jyoti Raj Sharma Jul 30 '17 at 5:51
  • You should definitely not take binaries from jessie-backports as they are compiled for a slightly different CPU. However, you can take the source code from jessie-backports and compile it for the Raspbian CPU. This is what is being described above - and from my point of view this should be ok. – Matthias Lüscher Jul 31 '17 at 21:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.