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, 12 insertions, 0 deletions

diff --git a/src/ext/ed25519/ref10/ge_p3_dbl.c b/src/ext/ed25519/ref10/ge_p3_dbl.c
new file mode 100644
index 0000000000..0d8a05915d
--- /dev/null
+++ b/src/ext/ed25519/ref10/ge_p3_dbl.c
@@ -0,0 +1,12 @@
+#include "ge.h"
+
+/*
+r = 2 * p
+*/
+
+void ge_p3_dbl(ge_p1p1 *r,const ge_p3 *p)
+{
+  ge_p2 q;
+  ge_p3_to_p2(&q,p);
+  ge_p2_dbl(r,&q);
+}