* what we want. Otherwise, return zero and no dirent pointer.
* The caller is responsible for freeing the dirent if one is returned.
*
- * Returns:
- * 0 => could not find an existing entry
- * 1 => found an existing entry
+ * Returns 0 if a valid-looking entry was found and a non-zero error
+ * code otherwise.
*/
static int
gssd_find_existing_krb5_ccache(uid_t uid, char *dirname, struct dirent **d)
char buf[1030];
char *princname = NULL;
char *realm = NULL;
- int score, best_match_score = 0;
+ int score, best_match_score = 0, err = -EACCES;
memset(&best_match_stat, 0, sizeof(best_match_stat));
*d = NULL;
free(namelist[i]);
continue;
}
+ if (uid == 0 && !root_uses_machine_creds &&
+ strstr(namelist[i]->d_name, "_machine_")) {
+ printerr(3, "CC file '%s' not available to root\n",
+ statname);
+ free(namelist[i]);
+ continue;
+ }
if (!query_krb5_ccache(buf, &princname, &realm)) {
printerr(3, "CC file '%s' is expired or corrupt\n",
statname);
free(namelist[i]);
+ err = -EKEYEXPIRED;
continue;
}
}
free(namelist);
}
- if (found)
- {
+ if (found) {
*d = best_match_dir;
+ return 0;
}
- return found;
-}
-
-
-#ifdef HAVE_SET_ALLOWABLE_ENCTYPES
-/*
- * this routine obtains a credentials handle via gss_acquire_cred()
- * then calls gss_krb5_set_allowable_enctypes() to limit the encryption
- * types negotiated.
- *
- * XXX Should call some function to determine the enctypes supported
- * by the kernel. (Only need to do that once!)
- *
- * Returns:
- * 0 => all went well
- * -1 => there was an error
- */
-
-int
-limit_krb5_enctypes(struct rpc_gss_sec *sec, uid_t uid)
-{
- u_int maj_stat, min_stat;
- gss_cred_id_t credh;
- gss_OID_set_desc desired_mechs;
- krb5_enctype enctypes[] = { ENCTYPE_DES_CBC_CRC,
- ENCTYPE_DES_CBC_MD5,
- ENCTYPE_DES_CBC_MD4 };
- int num_enctypes = sizeof(enctypes) / sizeof(enctypes[0]);
-
- /* We only care about getting a krb5 cred */
- desired_mechs.count = 1;
- desired_mechs.elements = &krb5oid;
-
- maj_stat = gss_acquire_cred(&min_stat, NULL, 0,
- &desired_mechs, GSS_C_INITIATE,
- &credh, NULL, NULL);
-
- if (maj_stat != GSS_S_COMPLETE) {
- if (get_verbosity() > 0)
- pgsserr("gss_acquire_cred",
- maj_stat, min_stat, &krb5oid);
- return -1;
- }
-
- maj_stat = gss_set_allowable_enctypes(&min_stat, credh, &krb5oid,
- num_enctypes, &enctypes);
- if (maj_stat != GSS_S_COMPLETE) {
- pgsserr("gss_set_allowable_enctypes",
- maj_stat, min_stat, &krb5oid);
- gss_release_cred(&min_stat, &credh);
- return -1;
- }
- sec->cred = credh;
- return 0;
+ return err;
}
-#endif /* HAVE_SET_ALLOWABLE_ENCTYPES */
/*
* Obtain credentials via a key in the keytab given
* given only a UID. We really need more information, but we
* do the best we can.
*
- * Returns:
- * 0 => a ccache was found
- * 1 => no ccache was found
+ * Returns 0 if a ccache was found, and a non-zero error code otherwise.
*/
int
gssd_setup_krb5_user_gss_ccache(uid_t uid, char *servername, char *dirname)
{
char buf[MAX_NETOBJ_SZ];
struct dirent *d;
+ int err;
printerr(2, "getting credentials for client with uid %u for "
"server %s\n", uid, servername);
memset(buf, 0, sizeof(buf));
- if (gssd_find_existing_krb5_ccache(uid, dirname, &d)) {
- snprintf(buf, sizeof(buf), "FILE:%s/%s", dirname, d->d_name);
- free(d);
- }
- else
- return 1;
+ err = gssd_find_existing_krb5_ccache(uid, dirname, &d);
+ if (err)
+ return err;
+
+ snprintf(buf, sizeof(buf), "FILE:%s/%s", dirname, d->d_name);
+ free(d);
+
printerr(2, "using %s as credentials cache for client with "
"uid %u for server %s\n", buf, uid, servername);
gssd_set_krb5_ccache_name(buf);
- return 0;
+ return err;
}
/*
krb5_free_context(context);
}
+
+#ifdef HAVE_SET_ALLOWABLE_ENCTYPES
+/*
+ * this routine obtains a credentials handle via gss_acquire_cred()
+ * then calls gss_krb5_set_allowable_enctypes() to limit the encryption
+ * types negotiated.
+ *
+ * XXX Should call some function to determine the enctypes supported
+ * by the kernel. (Only need to do that once!)
+ *
+ * Returns:
+ * 0 => all went well
+ * -1 => there was an error
+ */
+
+int
+limit_krb5_enctypes(struct rpc_gss_sec *sec, uid_t uid)
+{
+ u_int maj_stat, min_stat;
+ gss_cred_id_t credh;
+ gss_OID_set_desc desired_mechs;
+ krb5_enctype enctypes[] = { ENCTYPE_DES_CBC_CRC,
+ ENCTYPE_DES_CBC_MD5,
+ ENCTYPE_DES_CBC_MD4 };
+ int num_enctypes = sizeof(enctypes) / sizeof(enctypes[0]);
+ extern int num_krb5_enctypes;
+ extern krb5_enctype *krb5_enctypes;
+
+ /* We only care about getting a krb5 cred */
+ desired_mechs.count = 1;
+ desired_mechs.elements = &krb5oid;
+
+ maj_stat = gss_acquire_cred(&min_stat, NULL, 0,
+ &desired_mechs, GSS_C_INITIATE,
+ &credh, NULL, NULL);
+
+ if (maj_stat != GSS_S_COMPLETE) {
+ if (get_verbosity() > 0)
+ pgsserr("gss_acquire_cred",
+ maj_stat, min_stat, &krb5oid);
+ return -1;
+ }
+
+ /*
+ * If we failed for any reason to produce global
+ * list of supported enctypes, use local default here.
+ */
+ if (krb5_enctypes == NULL)
+ maj_stat = gss_set_allowable_enctypes(&min_stat, credh,
+ &krb5oid, num_enctypes, enctypes);
+ else
+ maj_stat = gss_set_allowable_enctypes(&min_stat, credh,
+ &krb5oid, num_krb5_enctypes, krb5_enctypes);
+
+ if (maj_stat != GSS_S_COMPLETE) {
+ pgsserr("gss_set_allowable_enctypes",
+ maj_stat, min_stat, &krb5oid);
+ gss_release_cred(&min_stat, &credh);
+ return -1;
+ }
+ sec->cred = credh;
+
+ return 0;
+}
+#endif /* HAVE_SET_ALLOWABLE_ENCTYPES */
projects / nfs-utils.git / blobdiff