[git] GCRYPT - branch, LIBGCRYPT-1-5-BRANCH, updated. libgcrypt-1.5.3-2-g497478c

[by Werner Koch]

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- Log -----------------------------------------------------------------
commit 497478c79711eee5a032ea91e9d7ad02a5a961cd
Author: Werner Koch <wk at gnupg.org>
Date:   Sat Sep 7 10:06:46 2013 +0200

    Fix bug in _gcry_mpi_tdiv_q_2exp.
    
    * mpi/mpi-internal.h (MPN_COPY_INCR): Make it work.
    --
    
    This bug has been with us since the version 0.0.0 of GnuPG.
    Fortunately it only affects an optimized code path which is rarely
    used in practice: If the shift size matches the size of a
    limb (i.e.. 32 or 64); this is is_prime in primegen.c.  Over there the
    Rabin-Miller test may fail with a probability of 2^-31 (that is if the
    to be tested prime - 1 has the low 32 bits cleared).  In practice the
    probability is even much less because we first do a Fermat test on the
    randomly generated candidates which sorts out the majority of
    composite numbers.
    
    The bug in MPN_COPY_INCR was found by Sven Bjorn.
    
    Signed-off-by: Werner Koch <wk at gnupg.org>
    
    (cherry picked from commit a7a9cdcaaf3979baa18dad51e722882581349f45)

diff --git a/THANKS b/THANKS
index 0f47d4f..6a44ead 100644
--- a/THANKS
+++ b/THANKS
@@ -135,6 +135,7 @@ Steffen Ullrich 	   ccrlphr at xensei.com
 Steffen Zahn		   zahn at berlin.snafu.de
 Steven Bakker		   steven at icoe.att.com
 Susanne Schultz 	   schultz at hsp.de
+Sven Bjorn
 Szakats Istvan             szaki.ms at gmail.com
 Thiago Jung Bauermann	   jungmann at cwb.matrix.com.br
 Thomas Roessler 	   roessler at guug.de
diff --git a/mpi/mpi-internal.h b/mpi/mpi-internal.h
index e75b7c6..8ba1d79 100644
--- a/mpi/mpi-internal.h
+++ b/mpi/mpi-internal.h
@@ -92,7 +92,7 @@ typedef int mpi_size_t;        /* (must be a signed type) */
     do {				\
 	mpi_size_t _i;			\
 	for( _i = 0; _i < (n); _i++ )	\
-	    (d)[_i] = (d)[_i];		\
+	    (d)[_i] = (s)[_i];		\
     } while (0)
 
 #define MPN_COPY_DECR( d, s, n ) \

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

Summary of changes:
 THANKS             |    1 +
 mpi/mpi-internal.h |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)


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