security-and-privacy/gnupg
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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-nks.c
View file

@ -56,6 +56,7 @@
#include "app-common.h"
#include "tlv.h"
#include "apdu.h"
#include "host2net.h"
static char const aid_nks[] = { 0xD2, 0x76, 0x00, 0x00, 0x03, 0x01, 0x02 };
static char const aid_sigg[] = { 0xD2, 0x76, 0x00, 0x00, 0x66, 0x01 };
@ -278,7 +279,7 @@ get_chv_status (app_t app, int sigg, int pwid)
rc = -1; /* Error. */
else
{
unsigned int sw = ((result[resultlen-2] << 8) | result[resultlen-1]);
unsigned int sw = buf16_to_uint (result+resultlen-2);
if (sw == 0x6a88)
rc = -2; /* No such PIN. */