[openbsc 2/4] gprs: Use RAND_bytes for p-tmsi

From: Daniel Willmann dwillmann@sysmocom.de

--- openbsc/src/gprs/gprs_sgsn.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/openbsc/src/gprs/gprs_sgsn.c b/openbsc/src/gprs/gprs_sgsn.c index f40de0b..2af1e97 100644 --- a/openbsc/src/gprs/gprs_sgsn.c +++ b/openbsc/src/gprs/gprs_sgsn.c @@ -525,7 +525,9 @@ uint32_t sgsn_alloc_ptmsi(void) int max_retries = 100;

restart: - ptmsi = rand(); + if (RAND_bytes(&ptmsi, sizeof(ptmsi)) != 1) + goto failed; + /* Enforce that the 2 MSB are set without loosing the distance between * identical values. Since rand() has no duplicate values within a * period (because the size of the state is the same like the size of