This has most of the features needed to act as a kinit that uses GSS
APIs, specifically gss_acquire_cred_from() and gss_store_cred_into2().
It's missing some functionality, such as being able to drive prompts
from AS responses (if we add minor status codes for representing KDC
pre-auth proposals, then we do drive prompts, but we would have to
encode a lot of mechanism-specific knowledge into gsstool).
The point of this commit is to explore:
- GSS functionality for kinit-like actions
- credential store key/value pairs supported by the mechanisms
- document the credential store key/value pairs (in gsstool.1)
that might lead to further enhancements. But gsstool acquire-cred
is quite functional at this point!
We must switch to OpenSSL 3.x, and getting lib/hcrypto to provide
OpenSSL 3.x APIs is too large an undertaking. Plus the hcrypto backend
is not safe, not secure (probably has timing leaks galore), and no one
has the resources to make it a world-class crypto library, so it just
has to go.
There were cases where we weren't negotiating SANON where we should
have. But we really don't want to overdo it. In particular we really
never ever want a user with expired or absent Kerberos credentials (say)
to accidentally negotiate SANON as that will then lead to authorization
errors down the line, and those would be hard to diagnose as they would
be masking the real issue (expired or absent credentials).
So basically either the user passes GSS_C_ANON_FLAG or (and/or) they
call gss_set_neg_mechs() to explicitly request SANON.
Partly authored by me, partly authored by Claude with heavy human
guidance, and reviewed by me.
To speed up tests/gss/check-gssmask we need to remove the `sleep 10`
found there, and to do that we need to make the gssmask daemons use
roken_detach_prep()/roken_detach_finish(), and to do that we need to
split up mini_inetd_addrinfo().
This commit authored by Claude with human guidance and review.
Windows clients forget GSS_C_MUTUAL_FLAG in some situations where they
use GSS_C_DCE_STYLE, in the assumption that GSS_C_MUTUAL_FLAG is
implied.
Both Windows and MIT as server already imply GSS_C_MUTUAL_FLAG
when GSS_C_DCE_STYLE is used.
BUG: https://bugzilla.samba.org/show_bug.cgi?id=15740
Signed-off-by: Stefan Metzmacher <metze@samba.org>
