initial

certspotter.go

@@ -0,0 +1,25 @@
+package assetfinder
+
+import "fmt"
+
+type CertSpotter struct{}
+
+func (CertSpotter) FetchSubDomains(domain string) ([]string, error) {
+	out := make([]string, 0)
+
+	fetchURL := fmt.Sprintf("https://certspotter.com/api/v0/certs?domain=%s", domain)
+
+	wrapper := []struct {
+		DNSNames []string `json:"dns_names"`
+	}{}
+	err := fetchJSON(fetchURL, &wrapper)
+	if err != nil {
+		return out, err
+	}
+
+	for _, w := range wrapper {
+		out = append(out, w.DNSNames...)
+	}
+
+	return out, nil
+}