diff options
Diffstat (limited to 'mpi/mpiutil.c')
| -rw-r--r-- | mpi/mpiutil.c | 21 |
1 files changed, 17 insertions, 4 deletions
diff --git a/mpi/mpiutil.c b/mpi/mpiutil.c index f6f9a8b2..fe1b7617 100644 --- a/mpi/mpiutil.c +++ b/mpi/mpiutil.c @@ -115,17 +115,30 @@ _gcry_mpi_assign_limb_space( gcry_mpi_t a, mpi_ptr_t ap, unsigned int nlimbs ) /**************** - * Resize the array of A to NLIMBS. the additional space is cleared - * (set to 0) [done by gcry_realloc()] + * Resize the array of A to NLIMBS. The additional space is cleared + * (set to 0). */ void _gcry_mpi_resize (gcry_mpi_t a, unsigned nlimbs) { + size_t i; + if (nlimbs <= a->alloced) - return; /* no need to do it */ + { + /* We only need to clear the new space (this is a nop if the + limb space is already of the correct size. */ + for (i=a->nlimbs; i < a->alloced; i++) + a->d[i] = 0; + return; + } + /* Actually resize the limb space. */ if (a->d) - a->d = gcry_xrealloc (a->d, nlimbs * sizeof (mpi_limb_t)); + { + a->d = gcry_xrealloc (a->d, nlimbs * sizeof (mpi_limb_t)); + for (i=a->alloced; i < nlimbs; i++) + a->d[i] = 0; + } else { if (a->flags & 1) |