Import osmo_{encode,decode}_big_endian() from openbsc
diff --git a/include/osmocom/core/utils.h b/include/osmocom/core/utils.h
index 27e1e18..dbc454f 100644
--- a/include/osmocom/core/utils.h
+++ b/include/osmocom/core/utils.h
@@ -76,4 +76,8 @@
 	*dst = talloc_strdup(ctx, newstr);
 }
 
+int osmo_constant_time_cmp(const uint8_t *exp, const uint8_t *rel, const int count);
+uint64_t osmo_decode_big_endian(const uint8_t *data, size_t data_len);
+uint8_t *osmo_encode_big_endian(uint64_t value, size_t data_len);
+
 /*! @} */