Bin: analyse-headers: better csp, x-xss, referer-policy and simple mode

The changes amount to the following.

x-xss-protection now "passes" if it's set to 1; mode=block

The CSP now fails if it doesn't have either a script-src or a
default-src.

It now checks for referrer-policy

simple mode is available which doesn't use colours, and instead prepends
each line with either "Misconfigured", "Good", or "Missing. Useful for
automating"

bin/.bin/webtest/analyse-headers

@@ -65,11 +65,20 @@ drawInBox(){
 # 1 = yellow
 # 2 = red
 getColour(){
-	case "$1" in
-		0) echo -en "$GREEN" ;;
-		1) echo -en "$YELLOW" ;;
-		2) echo -en "$RED" ;;
-	esac
+	if [ "$simple" == "true" ]; then
+		case "$1" in
+			0) echo "Good - " ;;
+			1) echo "Misconfigured - " ;;
+			2) echo "Missing - " ;;
+		esac
+
+	else
+		case "$1" in
+			0) echo -en "$GREEN" ;;
+			1) echo -en "$YELLOW" ;;
+			2) echo -en "$RED" ;;
+		esac
+	fi
 }
 
 printKey(){
@@ -126,8 +135,8 @@ test_x-powered-by(){
 
 test_x-xss-protection(){
 	local value
-	value="$(echo "$1" | cut -d ':' -f 2 | grep -oE '[0-9]+' )"
-	if [ "$value" = "0" ]; then
+	value="$(echo "$1" | cut -d ':' -f 2 | trimWhitespace )"
+	if [ "$value" = "0" ] || [ "$value" = "1; mode=block" ]; then
 		return 0
 	else
 		echo "X-XSS-Protection" | drawInBox
@@ -387,6 +396,7 @@ attacks (XSS).\n\n"
 		
 		local reportURI=false
 		local reportTO=false
+		local scriptOrDefaultSrc=false
 
 		[ -f "$lotsfile" ] || message+="WARNING: Lots file not available. Run with --fetch-lots in order to get it\n\n"
 
@@ -398,6 +408,9 @@ attacks (XSS).\n\n"
 				"report-to" ) reportTO=true ;;
 				*"-src")
 					# check sources
+					if [ "$directiveName" = "script-src" ] | [ "$directiveName" = "default-src" ]; then
+						scriptOrDefaultSrc=true;
+					fi
 					while read source; do
 						sourcemessage=''
 						case "$source" in
@@ -462,6 +475,12 @@ Eventually the report-to header will deprecate this directive, but it is not \
 yet supported in most browsers so including both is recomended.\n\n"
 			ret=$((ret>1 ? ret : 1))
 		fi
+		if [ "$scriptOrDefaultSrc" == "false" ]; then
+			message+="The content security policy doesn't include the \
+${ORANGE}script-src${NC} or ${ORANGE}script-src${NC} directive which are used \
+add allowed script sources. Without either, any scripts are allowed by default.\n\n"
+			ret=$((ret>1 ? ret : 1))
+		fi
 	 	
 	#	elif echo "$value" | grep -q 'unsafe-eval'; then
 	#		ret=$((ret>1 ? ret : 1))
@@ -715,6 +734,17 @@ they should not be cached. In order to enforce this, add the no-store directive.
 
 }
 
+test_referrer-policy(){
+	local value
+	value="$(echo "$1" | cut -d ':' -f 2- | trimWhitespace)"
+	if [ -z "$1" ] || ! echo "$value" | grep -q "strict-origin"; then
+		echo "Referrer-policy" | drawInBox
+		wecho "This allows control over what information is sent to another site within the referrer header. The referrer header is commonly used in site analytics to understand where traffic to a site is coming from.\n"
+		echo -e "https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cache-Control\n\n"
+		[ -z "$1" ] && return 2 || return 1
+	fi
+
+}
 
 usage(){
 	echo -n "analyse-headers [OPTIONS]... URL
@@ -767,6 +797,7 @@ set -- "${options[@]}"
 unset options
 
 insecure=""
+simple="false"
 
 windowsjoke=false
 if grep -q Microsoft /proc/version; then
@@ -778,6 +809,7 @@ while [[ $1 = -?* ]]; do
 	case $1 in
 		-h|--help) usage; exit;;
 		-k|--insecure) insecure="-k" ;;
+		--simple) simple="true" ;;
 		--fetch-lots ) fetchLots; exit ;;
 		--nojoke ) windowsjoke=false ;;
 		--) shift; break ;;
@@ -806,7 +838,8 @@ x-xss-protection
 x-content-type-options
 permissions-policy
 feature-policy
-cache-control"
+cache-control
+referrer-policy"
 
 tmpfile="$(mktemp)"
 touch "$tmpfile"
@@ -815,9 +848,11 @@ if [ "$windowsjoke" == "true" ]; then
   echo "Why would you use windows, do you hate yourself?"
 fi
 
-printKey
-
+if [ "$simple" == "false" ]; then
+	printKey
 echo ""
+fi
+
 
 echo "$headers" | sed -n '1p'
 
@@ -837,19 +872,27 @@ while read -r line; do
 		colour="$(getColour "$?")"
 		echo -e "${colour}$line${NC}"
 	else
-		echo "$line"
+		if [ "$simple" == "false" ]; then
+			echo "$line"
+		fi
 	fi
 done<<<"$(echo "$headers" | sed '1d')" # We don't want the initial http banner
 
 echo "$missingHeaders" | while read -r line; do
-	echo -e "${RED}$line${NC}"
+	if [ "$simple" == "false" ]; then
+		echo -e "${RED}$line${NC}"
+	else
+		echo "Missing - $line"
+	fi
 	functionName="test_$line"
 	"$functionName" >> "$tmpfile"
 done
 
 echo ""
 
-cat "$tmpfile"
+if [ "$simple" == "false" ]; then
+	cat "$tmpfile"
+fi
 rm "$tmpfile"