extended input validation

certbotinstall

@@ -33,6 +33,7 @@ printf -- "sudo ./certbotinstall -p 1234AkkbdceewEFJK\n\n"
 #
 clear
 
+
 #
 # Check if no arguments were given
 #
@@ -52,10 +53,17 @@ while [[ $# -gt 0 ]]; do
             fi
             apitoken="$1"
 
-            # Validate token at least 20 chars alphanum + - _
+            #
-            if [[ ! "$apitoken" =~ ^[A-Za-z0-9_-]{20,}$ ]]; then
+            # Validate Cloudflare API token format
-                echo "ERROR: API token format seems invalid."
+            #
-                echo "Cloudflare API tokens are usually long strings with letters, numbers, - and _."
+            if [[ "$apitoken" =~ [[:space:]] ]]; then
+                printf "\nERROR: API token cannot contain spaces or line breaks.\n\n"
+                exit 1
+            fi
+
+            if [[ ! "$apitoken" =~ ^[A-Za-z0-9_-]{20,120}$ ]]; then
+                printf "\nERROR: Invalid API token format.\n"
+                printf "Expected 20–120 characters (A–Z, a–z, 0–9, - or _).\n\n"
                 exit 1
             fi