diff options
Diffstat (limited to 'mpi/mpi-div.c')
| -rw-r--r-- | mpi/mpi-div.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/mpi/mpi-div.c b/mpi/mpi-div.c index 2955575a8..2b39cb4cf 100644 --- a/mpi/mpi-div.c +++ b/mpi/mpi-div.c @@ -1,5 +1,6 @@ /* mpi-div.c - MPI functions * Copyright (c) 1997 by Werner Koch (dd9jn) + * Copyright (C) 1994, 1996 Free Software Foundation, Inc. * * This file is part of G10. * @@ -16,6 +17,14 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + * + * Note: This code is heavily based on the GNU MP Library. + * Actually it's the same code with only minor changes in the + * way the data is stored; this is to support the abstraction + * of an optional secure memory allocation which may be used + * to avoid revealing of sensitive data due to paging etc. + * The GNU MP Library itself is published under the LGPL; + * however I decided to publish this code under the plain GPL. */ #include <config.h> @@ -189,7 +198,7 @@ mpi_tdiv_qr( MPI quot, MPI rem, MPI num, MPI den) /* Make sure QP and NP point to different objects. Otherwise the * numerator would be gradually overwritten by the quotient limbs. */ if(qp == np) { /* Copy NP object to temporary space. */ - np = marker[markidx++] = mpi_alloc_limb_space(nsize); + np = marker[markidx++] = mpi_alloc_limb_space(nsize,quot->secure); MPN_COPY(np, qp, nsize); } } @@ -209,7 +218,7 @@ mpi_tdiv_qr( MPI quot, MPI rem, MPI num, MPI den) /* Shift up the denominator setting the most significant bit of * the most significant word. Use temporary storage not to clobber * the original contents of the denominator. */ - tp = marker[markidx++] = mpi_alloc_limb_space(dsize); + tp = marker[markidx++] = mpi_alloc_limb_space(dsize,den->secure); mpihelp_lshift( tp, dp, dsize, normalization_steps ); dp = tp; @@ -230,7 +239,7 @@ mpi_tdiv_qr( MPI quot, MPI rem, MPI num, MPI den) if( dp == rp || (quot && (dp == qp))) { mpi_ptr_t tp; - tp = marker[markidx++] = mpi_alloc_limb_space(dsize); + tp = marker[markidx++] = mpi_alloc_limb_space(dsize, den->secure); MPN_COPY( tp, dp, dsize ); dp = tp; } |