add a version of ge_double_scalarmult_precomp_vartime with A precomp

1 files changed, 8 insertions, 3 deletions

diff --git a/src/crypto/crypto-ops.c b/src/crypto/crypto-ops.c
index 1e4969558..b5c62bce4 100644
--- a/src/crypto/crypto-ops.c
+++ b/src/crypto/crypto-ops.c
@@ -2000,17 +2000,15 @@ void ge_scalarmult(ge_p2 *r, const unsigned char *a, const ge_p3 *A) {
   }
 }
 
-void ge_double_scalarmult_precomp_vartime(ge_p2 *r, const unsigned char *a, const ge_p3 *A, const unsigned char *b, const ge_dsmp Bi) {
+void ge_double_scalarmult_precomp_vartime2(ge_p2 *r, const unsigned char *a, const ge_dsmp Ai, const unsigned char *b, const ge_dsmp Bi) {
   signed char aslide[256];
   signed char bslide[256];
-  ge_dsmp Ai; /* A, 3A, 5A, 7A, 9A, 11A, 13A, 15A */
   ge_p1p1 t;
   ge_p3 u;
   int i;
 
   slide(aslide, a);
   slide(bslide, b);
-  ge_dsm_precomp(Ai, A);
 
   ge_p2_0(r);
 
@@ -2041,6 +2039,13 @@ void ge_double_scalarmult_precomp_vartime(ge_p2 *r, const unsigned char *a, cons
   }
 }
 
+void ge_double_scalarmult_precomp_vartime(ge_p2 *r, const unsigned char *a, const ge_p3 *A, const unsigned char *b, const ge_dsmp Bi) {
+  ge_dsmp Ai; /* A, 3A, 5A, 7A, 9A, 11A, 13A, 15A */
+
+  ge_dsm_precomp(Ai, A);
+  ge_double_scalarmult_precomp_vartime2(r, a, Ai, b, Bi);
+}
+
 void ge_mul8(ge_p1p1 *r, const ge_p2 *t) {
   ge_p2 u;
   ge_p2_dbl(r, t);