[git] GnuPG - branch, STABLE-BRANCH-1-4, updated. gnupg-1.4.14-5-g9dc6dd0

[by Werner Koch]

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- Log -----------------------------------------------------------------
commit 9dc6dd0572102a2fa27df28ba4d66728827eb03d
Author: Werner Koch <wk at gnupg.org>
Date:   Mon Sep 16 15:57:01 2013 +0200

    Fix bug in 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>
    
    (back ported from Libgcrypt
     commit 7f7a5ef59962ae1a819b5060f9b781469bfe27d5)

diff --git a/mpi/mpi-internal.h b/mpi/mpi-internal.h
index c1df30a..46da08d 100644
--- a/mpi/mpi-internal.h
+++ b/mpi/mpi-internal.h
@@ -104,7 +104,7 @@ 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:
 mpi/mpi-internal.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)


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