AWS EC2 standard AWS AMI with PHP 7.0 - install libsodium recipe - php-7

Question

(edited for clarity - rolled in accepted answer)
Libsodium has been prepped for PHP 7. In doing this, the namespace was removed and a prefix of sodium_ for methods and SODIUM_ for constants was added. Also the version methods were removed.
This github page documents all the new functions and constants and the project provides backward compatibility with the \Sodium namespace: https://github.com/Firehed/sodium/blob/master/src/we_cant_have_nice_things.php
Recipe: install Libsodium on PHP 7 on and AWS AMI
# PHP 7.0 Libsodium install AWS AMI
yum install -y php7-pear re2c php70-devel
yum groupinstall -y "Development Tools"
pecl7 install libsodium
vi /etc/php-7.0.d/20-libsodium.ini
; Enable libsodium extension module
extension=sodium.so
service httpd restart
command line test to verify sodium is installed
php7 --info | grep sodium
test php function to verify calling pattern for password hash
<?php
$password = "hello";
$hash_str = sodium_crypto_pwhash_str(
$password,
\SODIUM_CRYPTO_PWHASH_OPSLIMIT_INTERACTIVE,
\SODIUM_CRYPTO_PWHASH_MEMLIMIT_INTERACTIVE
);
var_dump($password, $hash_str);
Thanks to #GracefulRestart for the help.

Answer 1

I see a couple problems here, the first is that your test file appears to be non-functional.
Running your test code with libsodium working in PHP 7 returns the following error:
PHP Fatal error: Uncaught Error: Call to undefined function Sodium\\library_version_major()
If you want to check the version, it may be easier to search the data from the phpinfo() function:
<?php phpinfo(); ?>
# or from CLI
php7 --info |grep sodium
The other problem I notice is in your install steps, you install libsodium both from source and from PECL. The make install command by default places the libraries in /usr/local/lib, while pecl7 install libsodium will normally install libraries into the default PHP modules directory.
If you were attempting to install from source, your /etc/php-7.0.d/20-libsodium.ini file is incorrect as that is loading the libsodium libraries you installed from PECL (you can check which directory it is loading from by check the extension_dir ini setting from phpinfo()).
If you only need to install from PECL, you do not need all of the development packages or any manual compiling.
EDIT I modified your posted recipe to remove the extraneous steps of downloading the source and just do everything with PECL:
yum install -y php7-pear re2c php70-devel
yum groupinstall -y "Development Tools"
# PHP 7.0
pecl7 install libsodium
vi /etc/php-7.0.d/20-libsodium.ini
; Enable libsodium extension module
extension=sodium.so
service httpd restart
If the YUM repositories for your distribution offer the php7-libsodium package, that would be an even smaller recipe
Hope that helps

Answer 2

Here's my solution to this recipe.
wget -c https://download.libsodium.org/libsodium/releases/libsodium-1.0.18.tar.gz
tar -xvf libsodium-1.0.18.tar.gz
cd libsodium-1.0.18
./configure
make && make check
make install
sudo pecl7 install -f libsodium
pecl7 should install and modify the php.ini file to include the following in the php.ini
extension="sodium.so"
If you running PHP in Elastic Beanstalk, the following file ./ebextentions/script.config :
files:
"/opt/elasticbeanstalk/hooks/appdeploy/pre/001_libsodium.sh":
mode: "000755"
owner: root
group: root
content: |
#!/usr/bin/env bash
wget -c https://download.libsodium.org/libsodium/releases/libsodium-1.0.18.tar.gz && tar -xvf libsodium-1.0.18.tar.gz && cd libsodium-1.0.18 && ./configure && make && make check && sudo make install && sudo pecl7 install -f libsodium