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https://github.com/itiligent/Easy-Guacamole-Installer.git
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215 lines
7.5 KiB
Bash
215 lines
7.5 KiB
Bash
#!/bin/bash
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#######################################################################################################################
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# Add self signed TLS certificates to Guacamole with Nginx reverse proxy
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# For Ubuntu / Debian / Raspbian
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# 4a of 4
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# David Harrop
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# April 2023
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#######################################################################################################################
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# Prepare text output colours
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GREY='\033[0;37m'
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DGREY='\033[0;90m'
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GREYB='\033[1;37m'
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LRED='\033[0;91m'
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LGREEN='\033[0;92m'
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LYELLOW='\033[0;93m'
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NC='\033[0m' #No Colour
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echo
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echo
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echo -e "${LGREEN}Setting up self signed TLS certificates for Nginx...${GREY}"
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echo
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# Setup script cmd line arguments for proxy site and certificate days
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TLSNAME=$1
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TLSDAYS=$2
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# Set default certificate file destinations.
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DIR_SSL_CERT="/etc/nginx/ssl/cert"
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DIR_SSL_KEY="/etc/nginx/ssl/private"
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# Make directories to place TLS Certificate if they don't exist
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if [[ ! -d $DIR_SSL_KEY ]]; then
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sudo mkdir -p $DIR_SSL_KEY
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fi
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if [[ ! -d $DIR_SSL_CERT ]]; then
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sudo mkdir -p $DIR_SSL_CERT
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fi
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# Discover IPv4 interface
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DEFAULT_IP=$(ip addr show $(ip route | awk '/default/ { print $5 }') | grep "inet" | head -n 1 | awk '/inet/ {print $2}' | cut -d'/' -f1)
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echo -e "${GREY}New self signed TLS certificate attributes are shown below...${DGREY}"
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# Display the new TLS cert parameters.
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cat <<EOF | tee $TMP_DIR/cert_attributes.txt
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[req]
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distinguished_name = req_distinguished_name
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x509_extensions = v3_req
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prompt = no
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string_mask = utf8only
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[req_distinguished_name]
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C = $CERT_COUNTRY
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ST = $CERT_STATE
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L = $CERT_LOCATION
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O = $CERT_ORG
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OU = $CERT_OU
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CN = $TLSNAME
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[v3_req]
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keyUsage = nonRepudiation, digitalSignature, keyEncipherment
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extendedKeyUsage = serverAuth, clientAuth, codeSigning, emailProtection
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subjectAltName = @alt_names
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[alt_names]
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DNS.1 = $TLSNAME
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IP.1 = $DEFAULT_IP
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EOF
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echo
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echo "{$GREY}Creating a new Nginx TLS Certificate..."
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openssl req -x509 -nodes -newkey rsa:2048 -keyout $TLSNAME.key -out $TLSNAME.crt -days $TLSDAYS -config $TMP_DIR/cert_attributes.txt
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if [ $? -ne 0 ]; then
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echo -e "${LRED}Failed. See ${INSTALL_LOG}${GREY}" 1>&2
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exit 1
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else
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echo -e "${LGREEN}OK${GREY}"
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echo
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fi
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# Place TLS Certificate into the defined application path
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sudo cp $TLSNAME.key $DIR_SSL_KEY/$TLSNAME.key
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sudo cp $TLSNAME.crt $DIR_SSL_CERT/$TLSNAME.crt
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# Create a PFX formatted key for easier import to Windows hosts and change permissions to enable copying elsewhere
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echo -e "${GREY}Converting client certificates for Windows & Linux...${GREY}"
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sudo openssl pkcs12 -export -out $TLSNAME.pfx -inkey $TLSNAME.key -in $TLSNAME.crt -password pass:1234
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if [ $? -ne 0 ]; then
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echo -e "${LRED}Failed. See ${INSTALL_LOG}${GREY}" 1>&2
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exit 1
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else
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echo -e "${LGREEN}OK${GREY}"
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echo
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fi
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# Change of permissions so certs can be copied via WinSCP.
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sudo chown $SUDO_USER:root $TLSNAME.pfx
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sudo chown $SUDO_USER:root $TLSNAME.crt
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sudo chown $SUDO_USER:root $TLSNAME.key
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# Backup the current Nginx config before update
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echo -e "${GREY}Backing up previous Nginx proxy to $DOWNLOAD_DIR/$TLSNAME-nginx.bak"
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cp /etc/nginx/sites-enabled/${TLSNAME} $DOWNLOAD_DIR/${TLSNAME}-nginx.bak
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if [ $? -ne 0 ]; then
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echo -e "${LRED}Failed. See ${INSTALL_LOG}${GREY}" 1>&2
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exit 1
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else
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echo -e "${LGREEN}OK${GREY}"
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echo
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fi
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# Update Nginx config to accept the new certificates
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echo -e "${GREY}Configuring Nginx proxy to use the self signed TLS certificate and setting up HTTP redirect...${DGREY}"
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cat <<EOF | tee /etc/nginx/sites-available/$TLSNAME
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server {
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#listen 80 default_server;
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root /var/www/html;
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index index.html index.htm index.nginx-debian.html;
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server_name $TLSNAME;
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location / {
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proxy_pass $GUAC_URL;
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proxy_buffering off;
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proxy_http_version 1.1;
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proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
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proxy_set_header Upgrade \$http_upgrade;
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proxy_set_header Connection \$http_connection;
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access_log off;
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}
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listen 443 ssl;
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ssl_certificate /etc/nginx/ssl/cert/$TLSNAME.crt;
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ssl_certificate_key /etc/nginx/ssl/private/$TLSNAME.key;
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ssl_session_cache shared:SSL:1m;
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ssl_session_timeout 5m;
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}
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server {
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return 301 https://\$host\$request_uri;
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listen 80 default_server;
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root /var/www/html;
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index index.html index.htm index.nginx-debian.html;
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server_name $TLSNAME;
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location / {
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proxy_pass $GUAC_URL;
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proxy_buffering off;
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proxy_http_version 1.1;
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proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
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proxy_set_header Upgrade \$http_upgrade;
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proxy_set_header Connection \$http_connection;
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access_log off;
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}
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}
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EOF
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if [ $? -ne 0 ]; then
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echo -e "${LRED}Failed. See ${INSTALL_LOG}${GREY}" 1>&2
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exit 1
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else
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echo -e "${LGREEN}OK${GREY}"
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echo
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fi
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# Update general ufw rules so force traffic via reverse proxy. Only Nginx and SSH will be available over the network.
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echo -e "${GREY}Updating firewall rules to allow only SSH and tcp 80/443..."
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sudo ufw default allow outgoing >/dev/null 2>&1
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sudo ufw default deny incoming >/dev/null 2>&1
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sudo ufw allow OpenSSH >/dev/null 2>&1
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sudo ufw allow 80/tcp >/dev/null 2>&1
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sudo ufw allow 443/tcp >/dev/null 2>&1
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echo "y" | sudo ufw enable >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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echo -e "${LRED}Failed. See ${INSTALL_LOG}${GREY}" 1>&2
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exit 1
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else
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echo -e "${LGREEN}OK${GREY}"
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echo
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fi
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# Reload everything
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echo -e "${GREY}Restaring Guacamole & Ngnix..."
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sudo systemctl restart $TOMCAT_VERSION
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sudo systemctl restart guacd
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sudo systemctl restart nginx
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if [ $? -ne 0 ]; then
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echo -e "${LRED}Failed. See ${INSTALL_LOG}${GREY}" 1>&2
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exit 1
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else
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echo -e "${LGREEN}OK${GREY}"
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echo
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fi
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# Hack to assist with displaying "$" symbols and " ' quotes in a (cut/paste-able) bash screen output format
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SHOWASTEXT1='$mypwd'
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SHOWASTEXT2='"Cert:\LocalMachine\Root"'
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printf "${GREY}+-------------------------------------------------------------------------------------------------------------
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${LGREEN}+ WINDOWS CLIENT SELF SIGNED TLS BROWSER CONFIG - SAVE THIS BEFORE CONTINUING!${GREY}
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+
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+ 1. In ${DOWNLOAD_DIR} is a Windows version of the new certificate ${LYELLOW}$TLSNAME.pfx${GREY}
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+ 2. Import this PFX file into your Windows client with the below Powershell commands (as Administrator):
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\n"
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echo -e "${SHOWASTEXT1} = ConvertTo-SecureString -String "1234" -Force -AsPlainText"
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echo -e "Import-pfxCertificate -FilePath $TLSNAME.pfx -Password "${SHOWASTEXT1}" -CertStoreLocation "${SHOWASTEXT2}""
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printf "${GREY}+-------------------------------------------------------------------------------------------------------------
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${LGREEN}+ LINUX CLIENT SELF SIGNED TLS BROWSER CONFIG - SAVE THIS BEFORE CONTINUING!${GREY}
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+
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+ 1. In ${DOWNLOAD_DIR} is a new Linux native OpenSSL certificate ${LYELLOW}$TLSNAME.crt${GREY}
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+ 2. Import the CRT file into your Linux client certificate store with the below command:
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\n"
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echo -e "(If certutil is not installed, run apt-get install libnss3-tools)"
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echo -e "mkdir -p $HOME/.pki/nssdb && certutil -d $HOME/.pki/nssdb -N"
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echo -e "certutil -d sql:$HOME/.pki/nssdb -A -t "CT,C,c" -n $TLSNAME -i $TLSNAME.crt"
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printf "+-------------------------------------------------------------------------------------------------------------\n"
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echo -e "${LYELLOW}The above TLS browser config instructions are saved in ${LGREEN}$INSTALL_LOG${GREY}"
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# Done
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echo -e ${NC}
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