[git] GCRYPT - branch, LIBGCRYPT-1-6-BRANCH, updated. libgcrypt-1.6.5-5-gc03cc00

[by NIIBE Yutaka]

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "The GNU crypto library".

The branch, LIBGCRYPT-1-6-BRANCH has been updated
       via  c03cc004133ab261e514ddd37ca40da17df7e6d8 (commit)
      from  53695204acb315deb10705ad35f133815418aa8b (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
commit c03cc004133ab261e514ddd37ca40da17df7e6d8
Author: NIIBE Yutaka <gniibe at fsij.org>
Date:   Thu Feb 25 12:01:10 2016 +0900

    mpi: Normalize EXPO for mpi_powm.
    
    * mpi/mpi-pow.c (gcry_mpi_powm): Normalize EP.
    
    --
    (backport from master
     commit fdfa5bfefdde316688a3c8021bd3528c5273b0f4)
    
    Thanks to Dan Fandrich for the report with a reproducible test case.
    
    GnuPG-bug-id: 2256
    
    Signed-off-by: NIIBE Yutaka <gniibe at fsij.org>

diff --git a/mpi/mpi-pow.c b/mpi/mpi-pow.c
index 70bf9e8..2dcd654 100644
--- a/mpi/mpi-pow.c
+++ b/mpi/mpi-pow.c
@@ -83,6 +83,7 @@ _gcry_mpi_powm (gcry_mpi_t res,
 
   rp = res->d;
   ep = expo->d;
+  MPN_NORMALIZE(ep, esize);
 
   if (!msize)
     _gcry_divide_by_zero();
@@ -429,6 +430,9 @@ _gcry_mpi_powm (gcry_mpi_t res,
   size = 2 * msize;
   msign = mod->sign;
 
+  ep = expo->d;
+  MPN_NORMALIZE(ep, esize);
+
   if (esize * BITS_PER_MPI_LIMB > 512)
     W = 5;
   else if (esize * BITS_PER_MPI_LIMB > 256)
@@ -445,7 +449,6 @@ _gcry_mpi_powm (gcry_mpi_t res,
   bsec = mpi_is_secure(base);
 
   rp = res->d;
-  ep = expo->d;
 
   if (!msize)
     _gcry_divide_by_zero();

-----------------------------------------------------------------------

Summary of changes:
 mpi/mpi-pow.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)


hooks/post-receive
-- 
The GNU crypto library
http://git.gnupg.org