sm: Add special case for expired intermediate certificates.
* sm/gpgsm.h (struct server_control_s): Add field 'current_time'. * sm/certchain.c (find_up_search_by_keyid): Detect a corner case. Also simplify by using ref-ed cert objects in place of an anyfound var.
See the code for a description of the problem. Tested using the certs
from the bug report and various command lines
gpgsm --faked-system-time=XXXX --disable-crl-checks \ -ea -v --debug x509 -r 0x95599828
with XXXX being 20190230T000000 -> target cert too young
with XXXX being 20190330T000000 -> okay
with XXXX being 20190830T000000 -> okay, using the long term cert
with XXXX being 20220330T000000 -> target cert expired
The --disabled-crl-checks option is required because in our a simple
test setting dirmngr does not know about the faked time.
- GnuPG-bug-id: T4696
- Signed-off-by: Werner Koch <email@example.com>