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Use inline functions to convert buffer data to scalars.

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* common/host2net.h (buf16_to_ulong, buf16_to_uint): New.
(buf16_to_ushort, buf16_to_u16): New.
(buf32_to_size_t, buf32_to_ulong, buf32_to_uint, buf32_to_u32): New.
--

Commit 91b826a388 was not enough to
avoid all sign extension on shift problems.  Hanno Böck found a case
with an invalid read due to this problem.  To fix that once and for
all almost all uses of "<< 24" and "<< 8" are changed by this patch to
use an inline function from host2net.h.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2015-02-11 10:27:57 +01:00
parent f0f71a721c
commit 2183683bd6
31 changed files with 220 additions and 210 deletions
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3
scd/app-openpgp.c
View file

@ -67,6 +67,7 @@
#include "iso7816.h"
#include "app-common.h"
#include "tlv.h"
#include "host2net.h"
/* A table describing the DOs of the card. */
@ -876,7 +877,7 @@ send_fprtime_if_not_null (ctrl_t ctrl, const char *keyword,
char numbuf1[50], numbuf2[50];
unsigned long value;
value = (stamp[0] << 24) | (stamp[1]<<16) | (stamp[2]<<8) | stamp[3];
value = buf32_to_ulong (stamp);
if (!value)
return;
sprintf (numbuf1, "%d", number);