Install old OpenSSL for use with PHPBrew and old PHP versions (e.g. 5.3)

old_openssl.sh

#!/bin/sh
#
# Build old OpenSSL for usage in old PHP builds
# (e.g. PHP 5.3).
#
# This solution was originally found at:
#   https://gist.github.com/marulitua/f8932064ec5bfe6a5be9fadac7c5a141
#
# Relevant discussions:
#   https://github.com/phpbrew/phpbrew/issues/418
#   https://www.php.net/manual/en/openssl.installation.php#115909
#
# This script is tested with Ubuntu 20.04, but
# it should work on most Linux systems that work
# with phpbrew.
#

set -e

PHPBREW_HOME="${PHPBREW_HOME:-$HOME/.phpbrew}"

if [ ! -d "${PHPBREW_HOME}" ]; then
    echo "${PHPBREW_HOME} does not exist"
    exit 1
fi

HACKS_DIR="${PHPBREW_HOME}/hacks"
HACK_OPENSSL_DIR="${HACKS_DIR}/openssl"

OPENSSL_TARBALL="openssl-1.0.2o.tar.gz"
OPENSSL_BASENAME="${OPENSSL_TARBALL%.tar.gz}"
OPENSSL_URL="https://www.openssl.org/source/${OPENSSL_TARBALL}"
OPENSSL_MD5="44279b8557c3247cbe324e2322ecd114"
OPENSSL_BUILD_DIR="${HACK_OPENSSL_DIR}/${OPENSSL_BASENAME}"
OPENSSL_DIR="${HACK_OPENSSL_DIR}/openssl"

mkdir -p "${HACK_OPENSSL_DIR}"
cd "${HACK_OPENSSL_DIR}"

if [ ! -f "${OPENSSL_TARBALL}" ]; then
    wget "${OPENSSL_URL}" -O "${OPENSSL_TARBALL}"
fi

if ! echo "${OPENSSL_MD5}  ${OPENSSL_TARBALL}" | md5sum --check ; then
    echo "md5sum (${OPENSSL_MD5}) check failed for ${OPENSSL_TARBALL}"
    exit 1
fi

tar xzf "${OPENSSL_TARBALL}"

cd "${OPENSSL_BUILD_DIR}"

./config -fPIC shared --prefix="${HACK_OPENSSL_DIR}" --openssldir="${OPENSSL_DIR}"

make -j $(nproc)

make test

make install

ln -sf "${HACK_OPENSSL_DIR}/lib" "${HACK_OPENSSL_DIR}/lib/x86_64-linux-gnu"

echo
echo "${OPENSSL_BASENAME} is ready at ${OPENSSL_DIR}"
echo "Now you can use it in a phpbrew build:"
echo "  phpbrew install 5.3 +openssl=${HACK_OPENSSL_DIR}"
echo