fix hmac

test/python/hmac/test_hmac.py

@@ -0,0 +1,16 @@
+import hmac
+
+secret = "0123456789"
+payload = "helloworld"
+
+h = hmac.new(secret.encode(),digestmod="hmac-md5")
+h.update(payload.encode())
+print("hmac-md5:",h.hexdigest())
+
+h = hmac.new(secret.encode(),digestmod="hmac-sha1")
+h.update(payload.encode())
+print("hmac-sha1:",h.hexdigest())
+
+h = hmac.new(secret.encode(),digestmod="hmac-sha256")
+h.update(payload.encode())
+print("hmac-sha256:",h.hexdigest())