Add the ed25519 ref10 code verbatim from supercop-20140622

We might use libsodium or ed25519-donna later on, but for now, let's
see whether this is fast enough.  We should use it in all cases when
performance doesn't matter.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/ext/ed25519/ref10/fe_invert.c b/src/ext/ed25519/ref10/fe_invert.c
new file mode 100644
index 0000000000..bcfdb8ff87
--- /dev/null
+++ b/src/ext/ed25519/ref10/fe_invert.c
@@ -0,0 +1,14 @@
+#include "fe.h"
+
+void fe_invert(fe out,const fe z)
+{
+  fe t0;
+  fe t1;
+  fe t2;
+  fe t3;
+  int i;
+
+#include "pow225521.h"
+
+  return;
+}