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px5g: creates certificates that expire in the past

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the attached patch fixes a bug of px5g when instructed to build
certificates that expire after 2038-01-19, caused a multiplication that
may overflow the "to" variable of type time_t

Attached patch checks if "to" precedes "from": if so sets "to" to its
maximum value. Pretty rude, but works well even if certificate is set to
expire in a century

Signed-off-by: Federico Fissore <federico@fissore.org>
Patchork: http://patchwork.openwrt.org/patch/3749/

SVN-Revision: 37165
This commit is contained in:
John Crispin 2013-07-04 13:31:32 +00:00
parent a1734998ee
commit 62cd76ab2c
1 changed files with 3 additions and 0 deletions
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package/utils/px5g/src/px5g.c
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@ -22,6 +22,7 @@
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <limits.h>
#include "polarssl/havege.h"
#include "polarssl/bignum.h"
#include "polarssl/x509.h"
@ -157,6 +158,8 @@ int selfsigned(char **arg) {
from = (from < 1000000000) ? 1000000000 : from;
strftime(fstr, sizeof(fstr), "%F %H:%M:%S", gmtime(&from));
to = from + 60 * 60 * 24 * days;
if (to < from)
to = INT_MAX;
strftime(tstr, sizeof(tstr), "%F %H:%M:%S", gmtime(&to));
x509_raw cert;