diff --git a/yespower.c b/yespower.c
new file mode 100644
index 0000000..9582f6b
--- /dev/null
+++ b/yespower.c
@@ -0,0 +1,16 @@
+#include "yespower.h"
+#include "sysendian.h"
+
+static const yespower_params_t v1 = {YESPOWER_0_5, 4096, 16, "Client Key", 10};
+
+static const yespower_params_t v2 = {YESPOWER_1_0, 4096, 16, NULL, 0};
+
+int yespower_hash(const char *input, char *output)
+{
+    uint32_t time = le32dec(&input[68]);
+    if (time > 1553904000) {
+        return yespower_tls(input, 80, &v2, (yespower_binary_t *) output);
+    } else {
+        return yespower_tls(input, 80, &v1, (yespower_binary_t *) output);
+    }
+}
\ No newline at end of file