[git] GCRYPT - branch, master, updated. libgcrypt-1.5.0-349-gd1cadd1

[by Jussi Kivilinna]

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      from  ba6bffafd17bea11985afc500022d66da261d59a (commit)

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- Log -----------------------------------------------------------------
commit d1cadd145199040299538891ab2ccd1208f7776e
Author: Jussi Kivilinna <jussi.kivilinna at iki.fi>
Date:   Wed Oct 30 08:57:15 2013 +0200

    bithelp: fix undefined behaviour with rol and ror
    
    * cipher/bithelp.h (rol, ror): Mask shift with 31.
    --
    
    Signed-off-by: Jussi Kivilinna <jussi.kivilinna at iki.fi>

diff --git a/cipher/bithelp.h b/cipher/bithelp.h
index 601ecac..418bdf5 100644
--- a/cipher/bithelp.h
+++ b/cipher/bithelp.h
@@ -26,14 +26,14 @@
 /****************
  * Rotate the 32 bit unsigned integer X by N bits left/right
  */
-static inline u32 rol( u32 x, int n)
+static inline u32 rol(u32 x, int n)
 {
-	return ( (x << n) | (x >> (32-n)) );
+	return ( (x << (n&(32-1))) | (x >> ((32-n)&(32-1))) );
 }
 
 static inline u32 ror(u32 x, int n)
 {
-	return ( (x >> n) | (x << (32-n)) );
+	return ( (x >> (n&(32-1))) | (x << ((32-n)&(32-1))) );
 }
 
 /* Byte swap for 32-bit and 64-bit integers.  If available, use compiler

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

Summary of changes:
 cipher/bithelp.h |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)


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