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Diffstat (limited to 'plugin/auth_ed25519/ref10/ge_tobytes.c')
-rw-r--r--plugin/auth_ed25519/ref10/ge_tobytes.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/plugin/auth_ed25519/ref10/ge_tobytes.c b/plugin/auth_ed25519/ref10/ge_tobytes.c
new file mode 100644
index 00000000..31b3d33e
--- /dev/null
+++ b/plugin/auth_ed25519/ref10/ge_tobytes.c
@@ -0,0 +1,14 @@
+#include "ge.h"
+
+void ge_tobytes(unsigned char *s,const ge_p2 *h)
+{
+ fe recip;
+ fe x;
+ fe y;
+
+ fe_invert(recip,h->Z);
+ fe_mul(x,h->X,recip);
+ fe_mul(y,h->Y,recip);
+ fe_tobytes(s,y);
+ s[31] ^= fe_isnegative(x) << 7;
+}