diff --git a/src/util/crypto.cpp b/src/util/crypto.cpp
new file mode 100644
index 0000000..ce17259
--- /dev/null
+++ b/src/util/crypto.cpp
@@ -0,0 +1,19 @@
+/**
+ * Copyright (C) 2013 Regents of the University of California.
+ * @author: Jeff Thompson <jefft0@remap.ucla.edu>
+ * See COPYING for copyright and distribution information.
+ */
+
+#include "ndn-cpp-dev/util/crypto.hpp"
+
+namespace ndn {
+
+void ndn_digestSha256(const uint8_t *data, size_t dataLength, uint8_t *digest)
+{
+  SHA256_CTX sha256;
+  SHA256_Init(&sha256);
+  SHA256_Update(&sha256, data, dataLength);
+  SHA256_Final(digest, &sha256);
+}
+
+} // namespace ndn