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authorMoxie Marlinspike <moxie@thoughtcrime.org>2014-11-24 12:54:30 -0800
committerMoxie Marlinspike <moxie@thoughtcrime.org>2014-11-24 12:54:30 -0800
commit60800e155612bea797eed93c67046a23d26054cc (patch)
treed88368c1c26162e27e790195133ca2b526597afe /jni/ed25519/ge_tobytes.c
Break out into separate repo.
Diffstat (limited to 'jni/ed25519/ge_tobytes.c')
-rw-r--r--jni/ed25519/ge_tobytes.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/jni/ed25519/ge_tobytes.c b/jni/ed25519/ge_tobytes.c
new file mode 100644
index 00000000..31b3d33e
--- /dev/null
+++ b/jni/ed25519/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;
+}