1 files changed, 27 insertions, 0 deletions
diff --git a/util/hashes.lua b/util/hashes.lua
new file mode 100644
index 00000000..64374a8f
--- /dev/null
+++ b/util/hashes.lua
@@ -0,0 +1,27 @@
+
+local softreq = function (...) return select(2, pcall(require, ...)); end
+
+module "hashes"
+
+local md5 = softreq("md5");
+if md5 then
+	if md5.digest then
+		local md5_digest = md5.digest;
+		local sha1_digest = sha1.digest;
+		function _M.md5(input)
+			return md5_digest(input);
+		end
+		function _M.sha1(input)
+			return sha1_digest(input);
+		end
+	elseif md5.sumhexa then
+		local md5_sumhexa = md5.sumhexa;
+		function _M.md5(input)
+			return md5_sumhexa(input);
+		end
+	else
+		error("md5 library found, but unrecognised... no hash functions will be available", 0);
+	end
+end
+
+return _M;