initial

bufferoverrun.go

@@ -0,0 +1,32 @@
+package assetfinder
+
+import (
+	"fmt"
+	"strings"
+)
+
+type BufferOverrun struct{}
+
+func (BufferOverrun) FetchSubDomains(domain string) ([]string, error) {
+	out := make([]string, 0)
+
+	fetchURL := fmt.Sprintf("https://dns.bufferover.run/dns?q=.%s", domain)
+
+	wrapper := struct {
+		Records []string `json:"FDNS_A"`
+	}{}
+	err := fetchJSON(fetchURL, &wrapper)
+	if err != nil {
+		return out, err
+	}
+
+	for _, r := range wrapper.Records {
+		parts := strings.SplitN(r, ",", 2)
+		if len(parts) != 2 {
+			continue
+		}
+		out = append(out, parts[1])
+	}
+
+	return out, nil
+}