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Do not use monotonic time for AKA sequence numbers, it has an undefined starting point

This commit is contained in:
Martin Willi 2009-10-09 09:03:13 +02:00
parent 655728621b
commit 424ddf801c
1 changed files with 4 additions and 6 deletions
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10
src/charon/plugins/eap_aka_3gpp2/eap_aka_3gpp2_provider.c
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@ -75,14 +75,12 @@ void eap_aka_3gpp2_get_sqn(char sqn[AKA_SQN_LEN], int offset)
{
timeval_t time;
time_monotonic(&time);
/* set sqn to an integer containing seconds followed by most
* significant useconds */
gettimeofday(&time, NULL);
/* set sqn to an integer containing 4 bytes seconds + 2 bytes usecs */
time.tv_sec = htonl(time.tv_sec + offset);
/* usec's are never larger than 0x000f423f, so we shift the 12 first bits */
time.tv_usec <<= 12;
time.tv_usec = htonl(time.tv_usec);
memcpy(sqn, &time.tv_sec, 4);
time.tv_usec = htonl(time.tv_usec << 12);
memcpy(sqn, (char*)&time.tv_sec + sizeof(time_t) - 4, 4);
memcpy(sqn + 4, &time.tv_usec, 2);
}