[SSSD-users] sss_ssh_authorizedkeys returning "Error looking up public keys"

[Philip Colmer]

We are using Ubuntu 18.04 with sssd 1.16.1-1ubuntu1.8.

sssd is being used to allow users to sign in with SSH keys matched against keys stored in OpenLDAP. This has been used for several years but, just recently, a couple of users were reporting that they could not SSH to the server. Further investigation showed that running "sss_ssh_authorizedkeys" for these specific users returned "Error looking up public keys". The tool continues to work correctly for other users.

I cannot find any information that might suggest why the tool is not managing to get the keys for these users.

I have tried building the code from the GitHub source but it errors out with this:

In file included from ./src/util/sss_pam_data.h:33:0,
                 from src/util/sss_pam_data.c:27:
./src/util/debug.h:92:44: error: unknown type name ‘uid_t’; did you mean ‘__id_t’?
 int chown_debug_file(const char *filename, uid_t uid, gid_t gid);
                                            ^~~~~
                                            __id_t
./src/util/debug.h:92:55: error: unknown type name ‘gid_t’; did you mean ‘__id_t’?
 int chown_debug_file(const char *filename, uid_t uid, gid_t gid);
                                                       ^~~~~
                                                       __id_t
Makefile:22359: recipe for target 'src/util/libsss_util_la-sss_pam_data.lo' failed

Can anyone suggest how I can troubleshoot this tool in order to fix the error or how I can get it to build on Ubuntu?

Thanks.

Philip