validate-path added

spells/cantrips/validate-path

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# POSIX compliant regular expressions
+# Matches any string that contains a null byte or begins or ends with a /
+REGEX1='(^/|/$|\\0)'
+# Matches any string longer than 255 characters (for a single filename)
+REGEX2='^.{256,}$'
+# Matches any string longer than 4096 characters (for a full path)
+REGEX3='^.{4097,}$'
+
+if echo "$1" | grep -Eq "$REGEX1" || echo "$1" | grep -Eq "$REGEX2" || echo "$1" | grep -Eq "$REGEX3"; then
+    # If any regex matches, this is an invalid path
+    exit 1
+else
+    # Otherwise, it's valid
+    exit 0
+fi

spells/cantrips/validate-ssh-key

@@ -0,0 +1,11 @@
+!/bin/sh
+
+read -p "Enter the SSH key: " ssh_key
+
+# Check if the SSH key is in the correct format
+if ! echo "$ssh_key" | grep -E '^ssh-([a-zA-Z0-9]+) ([A-Za-z0-9+/]+=*) ([A-Za-z0-9]+@[A-Za-z0-9]+)?$' > /dev/null; then
+    echo "Invalid SSH key format."
+    exit 1
+fi
+
+echo "Valid SSH key."