ecc: Relax condition for 25519 computations.

* mpi/ec.c (ec_addm_25519, ec_subm_25519, ec_mulm_25519): Check number
of limbs, allocated more is OK.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/mpi/ec.c b/mpi/ec.c
index 21cf78b4..c6419ba9 100644
--- a/mpi/ec.c
+++ b/mpi/ec.c
@@ -396,7 +396,7 @@ ec_addm_25519 (gcry_mpi_t w, gcry_mpi_t u, gcry_mpi_t v, mpi_ec_t ctx)
   mpi_limb_t n[LIMB_SIZE_25519];
   mpi_limb_t borrow;
 
-  if (w->alloced != wsize || u->alloced != wsize || v->alloced != wsize)
+  if (w->nlimbs != wsize || u->nlimbs != wsize || v->nlimbs != wsize)
     log_bug ("addm_25519: different sizes\n");
 
   memset (n, 0, sizeof n);
@@ -419,7 +419,7 @@ ec_subm_25519 (gcry_mpi_t w, gcry_mpi_t u, gcry_mpi_t v, mpi_ec_t ctx)
   mpi_limb_t n[LIMB_SIZE_25519];
   mpi_limb_t borrow;
 
-  if (w->alloced != wsize || u->alloced != wsize || v->alloced != wsize)
+  if (w->nlimbs != wsize || u->nlimbs != wsize || v->nlimbs != wsize)
     log_bug ("subm_25519: different sizes\n");
 
   memset (n, 0, sizeof n);
@@ -444,7 +444,7 @@ ec_mulm_25519 (gcry_mpi_t w, gcry_mpi_t u, gcry_mpi_t v, mpi_ec_t ctx)
   int msb;
 
   (void)ctx;
-  if (w->alloced != wsize || u->alloced != wsize || v->alloced != wsize)
+  if (w->nlimbs != wsize || u->nlimbs != wsize || v->nlimbs != wsize)
     log_bug ("mulm_25519: different sizes\n");
 
   up = u->d;