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 namespace, domain, user;
  40         char *mapped_user;
  41         NTSTATUS status;
  42         bool ok;
  43
  44         req = tevent_req_create(mem_ctx, &state,
  45                                 struct winbindd_pam_chauthtok_state);
  46         if (req == NULL) {
  47                 return NULL;
  48         }
  49         state->request = request;
  50
  51         /* Ensure null termination */
  52         request->data.chauthtok.user[
  53                 sizeof(request->data.chauthtok.user)-1]='\0';
  54
  55         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)cli->pid,
  56                   request->data.chauthtok.user));
  57
  58         status = normalize_name_unmap(state, request->data.chauthtok.user,
  59                                       &mapped_user);
  60
  61         if (NT_STATUS_IS_OK(status) ||
  62             NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  63                 fstrcpy(request->data.chauthtok.user, mapped_user);
  64         }
  65
  66         ok = canonicalize_username(request->data.chauthtok.user,
  67                                    namespace,
  68                                    domain,
  69                                    user);
  70         if (!ok) {
  71                 DEBUG(10, ("winbindd_pam_chauthtok: canonicalize_username %s "
  72                            "failed with\n", request->data.chauthtok.user));
  73                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  74                 return tevent_req_post(req, ev);
  75         }
  76
  77         contact_domain = find_domain_from_name(namespace);
  78         if (contact_domain == NULL) {
  79                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] "
  80                           "as %s is not a trusted domain\n",
  81                           request->data.chauthtok.user, domain, user, domain));
  82                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  83                 return tevent_req_post(req, ev);
  84         }
  85
  86         subreq = wb_domain_request_send(state, server_event_context(),
  87                                         contact_domain, request);
  88         if (tevent_req_nomem(subreq, req)) {
  89                 return tevent_req_post(req, ev);
  90         }
  91         tevent_req_set_callback(subreq, winbindd_pam_chauthtok_done, req);
  92         return req;
  93 }
  94
  95 static void winbindd_pam_chauthtok_done(struct tevent_req *subreq)
  96 {
  97         struct tevent_req *req = tevent_req_callback_data(
  98                 subreq, struct tevent_req);
  99         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
 100                 req, struct winbindd_pam_chauthtok_state);
 101         int res, err;
 102
 103         res = wb_domain_request_recv(subreq, state, &state->response, &err);
 104         TALLOC_FREE(subreq);
 105         if (res == -1) {
 106                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 107                 return;
 108         }
 109         tevent_req_done(req);
 110 }
 111
 112 NTSTATUS winbindd_pam_chauthtok_recv(struct tevent_req *req,
 113                                      struct winbindd_response *response)
 114 {
 115         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
 116                 req, struct winbindd_pam_chauthtok_state);
 117         NTSTATUS status;
 118
 119         if (tevent_req_is_nterror(req, &status)) {
 120                 set_auth_errors(response, status);
 121                 return status;
 122         }
 123         *response = *state->response;
 124         response->result = WINBINDD_PENDING;
 125         state->response = talloc_move(response, &state->response);
 126
 127         status = NT_STATUS(response->data.auth.nt_status);
 128         if (!NT_STATUS_IS_OK(status)) {
 129                 return status;
 130         }
 131
 132         if (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) {
 133
 134                 /* Update the single sign-on memory creds. */
 135                 status = winbindd_replace_memory_creds(
 136                         state->request->data.chauthtok.user,
 137                         state->request->data.chauthtok.newpass);
 138
 139                 DEBUG(10, ("winbindd_replace_memory_creds returned %s\n",
 140                            nt_errstr(status)));
 141
 142                 /*
 143                  * When we login from gdm or xdm and password expires,
 144                  * we change password, but there are no memory
 145                  * crendentials So, winbindd_replace_memory_creds()
 146                  * returns NT_STATUS_OBJECT_NAME_NOT_FOUND. This is
 147                  * not a failure.  --- BoYang
 148                  */
 149                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 150                         status = NT_STATUS_OK;
 151                 }
 152         }
 153         return status;
 154 }