Install libsodium-1.0.2 and PECL libsodium on Ubuntu 14.04

install-libsodium.sh

#!/usr/bin/env bash

PECLVER="0.1.1"
LIBSODIUMVER="1.0.2"

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi

gpg --fingerprint 54A2B8892CC3D6A597B92B6C210627AABA709FE1
if [ $? -ne 0 ]; then
    echo -e "\033[33mDownloading PGP Public Key...\033[0m"
    gpg --recv-keys 54A2B8892CC3D6A597B92B6C210627AABA709FE1
    # Jedi/Sector One <j@pureftpd.org>
    gpg --fingerprint 54A2B8892CC3D6A597B92B6C210627AABA709FE1
    if [ $? -ne 0 ]; then
        echo -e "\033[31mCould not download PGP public key for verification\033[0m"
        exit
    fi
fi

# Let's try to install the PECL Extension
pecl install channel://pecl.php.net/libsodium-$PECLVER
if [ $? -ne 0 ]; then
    # We need to install libsodium
    mkdir tmp
    cd tmp
    if [ ! -f libsodium-$LIBSODIUMVER.tar.gz ]; then
        wget https://download.libsodium.org/libsodium/releases/libsodium-$LIBSODIUMVER.tar.gz
    fi
    if [ ! -f libsodium-$LIBSODIUMVER.tar.gz.sig ]; then
        wget https://download.libsodium.org/libsodium/releases/libsodium-$LIBSODIUMVER.tar.gz.sig
    fi
    gpg --verify libsodium-$LIBSODIUMVER.tar.gz.sig libsodium-$LIBSODIUMVER.tar.gz
    if [ $? -eq 0 ]; then
        tar -xvzf libsodium-$LIBSODIUMVER.tar.gz
        cd libsodium-$LIBSODIUMVER
        ./configure
        make && make check
        if [ $? -eq 0 ]; then
            # we passed our tests? let's install libsodium
            make install
            if [ $? -eq 0 ]; then
                # cleanup
                cd ..
                cd ..
                rm -rf tmp
                # now let's install the PECL extension
                pecl install channel://pecl.php.net/libsodium-$PECLVER
            fi
        fi 
    else
        echo -e "\033[31mSignature did not match! Check /tmp/libsodium-$LIBSODIUMVER.tar.gz for trojans\033[0m"
        cd ..
        exit
    fi
fi