initital commit

internal/handlers/keygen.go

@@ -0,0 +1,18 @@
+package handlers
+
+import (
+	"crypto/rand"
+	"fmt"
+	"strings"
+)
+
+// GenerateKey produces a license key in the format XXXX-XXXX-XXXX-XXXX
+func GenerateKey() string {
+	b := make([]byte, 8)
+	rand.Read(b)
+	hex := fmt.Sprintf("%X", b)
+	parts := []string{
+		hex[0:4], hex[4:8], hex[8:12], hex[12:16],
+	}
+	return strings.Join(parts, "-")
+}