1 files changed, 13 insertions, 0 deletions
diff --git a/ext/util.h b/ext/util.h
new file mode 100644
index 0000000..c67972e
--- /dev/null
+++ b/ext/util.h
@@ -0,0 +1,13 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+int bin2hex(char *hex, size_t hexsize, const uint8_t *bin, size_t binlen);
+int hex2bin(uint8_t *bin, size_t binsize, const char *hex, size_t hexlen);
+
+void randombytes(uint8_t *buf, uint64_t n);
+void memzero(void *ptr, size_t num);
+
+#endif /* end of include guard: UTIL_H */