source3/winbindd/winbindd_pam_chauthtok.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_PAM_CHAUTHTOK
   4    Copyright (C) Volker Lendecke 2010
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "winbindd.h"
  22
  23 struct winbindd_pam_chauthtok_state {
  24         struct winbindd_request *request;
  25         struct winbindd_response *response;
  26 };
  27
  28 static void winbindd_pam_chauthtok_done(struct tevent_req *subreq);
  29
  30 struct tevent_req *winbindd_pam_chauthtok_send(
  31         TALLOC_CTX *mem_ctx,
  32         struct tevent_context *ev,
  33         struct winbindd_cli_state *cli,
  34         struct winbindd_request *request)
  35 {
  36         struct tevent_req *req, *subreq;
  37         struct winbindd_pam_chauthtok_state *state;
  38         struct winbindd_domain *contact_domain;
  39         fstring domain, user;
  40         char *mapped_user;
  41         NTSTATUS status;
  42
  43         req = tevent_req_create(mem_ctx, &state,
  44                                 struct winbindd_pam_chauthtok_state);
  45         if (req == NULL) {
  46                 return NULL;
  47         }
  48         state->request = request;
  49
  50         /* Ensure null termination */
  51         request->data.chauthtok.user[
  52                 sizeof(request->data.chauthtok.user)-1]='\0';
  53
  54         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)cli->pid,
  55                   request->data.chauthtok.user));
  56
  57         status = normalize_name_unmap(state, request->data.chauthtok.user,
  58                                       &mapped_user);
  59
  60         if (NT_STATUS_IS_OK(status) ||
  61             NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  62                 fstrcpy(request->data.chauthtok.user, mapped_user);
  63         }
  64
  65         if (!canonicalize_username(request->data.chauthtok.user, domain,
  66                                    user)) {
  67                 DEBUG(10, ("winbindd_pam_chauthtok: canonicalize_username %s "
  68                            "failed with\n", request->data.chauthtok.user));
  69                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  70                 return tevent_req_post(req, ev);
  71         }
  72
  73         contact_domain = find_domain_from_name(domain);
  74         if (contact_domain == NULL) {
  75                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] "
  76                           "as %s is not a trusted domain\n",
  77                           request->data.chauthtok.user, domain, user, domain));
  78                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  79                 return tevent_req_post(req, ev);
  80         }
  81
  82         subreq = wb_domain_request_send(state, winbind_event_context(),
  83                                         contact_domain, request);
  84         if (tevent_req_nomem(subreq, req)) {
  85                 return tevent_req_post(req, ev);
  86         }
  87         tevent_req_set_callback(subreq, winbindd_pam_chauthtok_done, req);
  88         return req;
  89 }
  90
  91 static void winbindd_pam_chauthtok_done(struct tevent_req *subreq)
  92 {
  93         struct tevent_req *req = tevent_req_callback_data(
  94                 subreq, struct tevent_req);
  95         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
  96                 req, struct winbindd_pam_chauthtok_state);
  97         int res, err;
  98
  99         res = wb_domain_request_recv(subreq, state, &state->response, &err);
 100         TALLOC_FREE(subreq);
 101         if (res == -1) {
 102                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 103                 return;
 104         }
 105         tevent_req_done(req);
 106 }
 107
 108 NTSTATUS winbindd_pam_chauthtok_recv(struct tevent_req *req,
 109                                      struct winbindd_response *response)
 110 {
 111         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
 112                 req, struct winbindd_pam_chauthtok_state);
 113         NTSTATUS status;
 114
 115         if (tevent_req_is_nterror(req, &status)) {
 116                 set_auth_errors(response, status);
 117                 return status;
 118         }
 119         *response = *state->response;
 120         response->result = WINBINDD_PENDING;
 121         state->response = talloc_move(response, &state->response);
 122
 123         status = NT_STATUS(response->data.auth.nt_status);
 124         if (!NT_STATUS_IS_OK(status)) {
 125                 return status;
 126         }
 127
 128         if (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) {
 129
 130                 /* Update the single sign-on memory creds. */
 131                 status = winbindd_replace_memory_creds(
 132                         state->request->data.chauthtok.user,
 133                         state->request->data.chauthtok.newpass);
 134
 135                 DEBUG(10, ("winbindd_replace_memory_creds returned %s\n",
 136                            nt_errstr(status)));
 137
 138                 /*
 139                  * When we login from gdm or xdm and password expires,
 140                  * we change password, but there are no memory
 141                  * crendentials So, winbindd_replace_memory_creds()
 142                  * returns NT_STATUS_OBJECT_NAME_NOT_FOUND. This is
 143                  * not a failure.  --- BoYang
 144                  */
 145                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 146                         status = NT_STATUS_OK;
 147                 }
 148         }
 149         return status;
 150 }