search for: krb5_cc_get_full_nam

On Thu, 2017-02-09 at 14:45 -0600, Chad William Seys wrote: > Hi Jeff, > Could you look at the following mailing list posting? > > https://lists.samba.org/archive/samba/2017-February/206468.html > > It looks like cifs.upcall has changed its behavior. As described in > that post, I can mount with root / kerberos, but then cannot access with > another user who has

...+ char *cachename; + + if (env_cachename) { + if (setenv(ENV_NAME, env_cachename, 1)) + syslog(LOG_DEBUG, "%s: failed to setenv %d\n", __func__, errno); + } ret = krb5_cc_default(context, &cc); if (ret) { @@ -166,6 +282,14 @@ get_default_cc(void) return NULL; } + ret = krb5_cc_get_full_name(context, cc, &cachename); + if (ret) { + syslog(LOG_DEBUG, "%s: krb5_cc_get_full_name failed: %d\n", __func__, ret); + } else { + syslog(LOG_DEBUG, "%s: default ccache is %s\n", __func__, cachename); + krb5_free_string(context, cachename); + } + if (!get_tgt_time(cc))...

Third respin of this series. Reordered for better safety for bisecting. The environment scraping is now on by default, but can be disabled with "-E" in environments where it's not needed. Also, I've added a patch to make cifs.upcall drop capabilities before doing most of its work. This may help reduce the attack surface of the program. Jeff Layton (4): cifs.upcall: convert

Small respin of the patches that I posted a few days ago. The main difference is the reordering of the series to make it do the group and grouplist manipulation first, and then the patch that makes it grab the KRB5CCNAME from the initiating process. I think the code is sound, my main question is whether we really need the command-line switch for this. Should this just be the default mode of

Apologies for v3 series, I had some extra patches in there. This is the one that should have been sent. Relabeled as v4 for clarity. Third respin of this series. Reordered for better safety for bisecting. The environment scraping is now on by default, but can be disabled with "-E" in environments where it's not needed. Also, I've added a patch to make cifs.upcall drop

...b4a5..dd0843e358b1 100644 --- a/cifs.upcall.c +++ b/cifs.upcall.c @@ -159,6 +159,7 @@ get_default_cc(void) { krb5_error_code ret; krb5_ccache cc; + char *cachename; ret = krb5_cc_default(context, &cc); if (ret) { @@ -166,6 +167,14 @@ get_default_cc(void) return NULL; } + ret = krb5_cc_get_full_name(context, cc, &cachename); + if (ret) { + syslog(LOG_DEBUG, "%s: krb5_cc_get_full_name failed: %d\n", __func__, ret); + } else { + syslog(LOG_DEBUG, "%s: default ccache is %s\n", __func__, cachename); + krb5_free_string(context, cachename); + } + if (!get_tgt_time(cc))...