-/* v3 MD5 fingerprint is 16 characters, v4 SHA-1 fingerprint is 20 */
-#define MAX_FINGERPRINT_LEN 20
+/*
+ * Fingerprint lengths
+ *
+ * v3 MD5 fingerprint is 16 bytes
+ * v4 SHA-1 fingerprint is 20
+ * v5 SHA2-256 fingerprint is 32
+ */
+#define FINGERPRINT_V3_LEN 16
+#define FINGERPRINT_V4_LEN 20
+#define FINGERPRINT_V5_LEN 32
+#define MAX_FINGERPRINT_LEN 32