Add cert support for alt names

backend/src/services/certificate-authority/certificate-authority-validators.ts

@@ -6,3 +6,29 @@ const isValidDate = (dateString: string) => {
 };
 
 export const validateCaDateField = z.string().trim().refine(isValidDate, { message: "Invalid date format" });
+
+export const hostnameRegex = /^(?!:\/\/)([a-zA-Z0-9-_]{1,63}\.?)+(?!:\/\/)([a-zA-Z]{2,63})$/;
+export const validateAltNamesField = z
+  .string()
+  .trim()
+  .default("")
+  .transform((data) => {
+    if (data === "") return "";
+    // Trim each alt name and join with ', ' to ensure formatting
+    return data
+      .split(",")
+      .map((id) => id.trim())
+      .join(", ");
+  })
+  .refine(
+    (data) => {
+      if (data === "") return true;
+      // Split and validate each alt name
+      return data.split(", ").every((name) => {
+        return hostnameRegex.test(name) || z.string().email().safeParse(name).success;
+      });
+    },
+    {
+      message: "Each alt name must be a valid hostname or email address"
+    }
+  );