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 #include "lib/util/string_wrappers.h"
  23 #include "lib/global_contexts.h"
  24 #include "librpc/gen_ndr/ndr_winbind_c.h"
  25
  26 static void fill_in_password_policy(struct winbindd_response *r,
  27                                     const struct samr_DomInfo1 *p)
  28 {
  29         r->data.auth.policy.min_length_password =
  30                 p->min_password_length;
  31         r->data.auth.policy.password_history =
  32                 p->password_history_length;
  33         r->data.auth.policy.password_properties =
  34                 p->password_properties;
  35         r->data.auth.policy.expire      =
  36                 nt_time_to_unix_abs((const NTTIME *)&(p->max_password_age));
  37         r->data.auth.policy.min_passwordage =
  38                 nt_time_to_unix_abs((const NTTIME *)&(p->min_password_age));
  39 }
  40
  41 struct winbindd_pam_chauthtok_state {
  42         struct wbint_PamAuthChangePassword r;
  43 };
  44
  45 static void winbindd_pam_chauthtok_done(struct tevent_req *subreq);
  46
  47 struct tevent_req *winbindd_pam_chauthtok_send(
  48         TALLOC_CTX *mem_ctx,
  49         struct tevent_context *ev,
  50         struct winbindd_cli_state *cli,
  51         struct winbindd_request *request)
  52 {
  53         struct tevent_req *req, *subreq;
  54         struct winbindd_pam_chauthtok_state *state;
  55         struct winbindd_domain *contact_domain;
  56         char *namespace = NULL;
  57         char *domain = NULL;
  58         char *user = NULL;
  59         char *chauthtok_user = NULL;
  60         char *mapped_user;
  61         NTSTATUS status;
  62         bool ok;
  63
  64         req = tevent_req_create(mem_ctx, &state,
  65                                 struct winbindd_pam_chauthtok_state);
  66         if (req == NULL) {
  67                 return NULL;
  68         }
  69
  70         /* Ensure null termination */
  71         request->data.chauthtok.user[
  72                 sizeof(request->data.chauthtok.user)-1]='\0';
  73
  74         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)cli->pid,
  75                   request->data.chauthtok.user));
  76
  77         status = normalize_name_unmap(state, request->data.chauthtok.user,
  78                                       &mapped_user);
  79
  80         if (NT_STATUS_IS_OK(status) ||
  81             NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  82                 fstrcpy(request->data.chauthtok.user, mapped_user);
  83         }
  84
  85         chauthtok_user = request->data.chauthtok.user;
  86         ok = canonicalize_username(req,
  87                                    &chauthtok_user,
  88                                    &namespace,
  89                                    &domain,
  90                                    &user);
  91         if (!ok) {
  92                 DEBUG(10, ("winbindd_pam_chauthtok: canonicalize_username %s "
  93                            "failed with\n", request->data.chauthtok.user));
  94                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  95                 return tevent_req_post(req, ev);
  96         }
  97
  98         fstrcpy(request->data.chauthtok.user, chauthtok_user);
  99
 100         contact_domain = find_domain_from_name(namespace);
 101         if (contact_domain == NULL) {
 102                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] "
 103                           "as %s is not a trusted domain\n",
 104                           request->data.chauthtok.user, domain, user, domain));
 105                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
 106                 return tevent_req_post(req, ev);
 107         }
 108
 109         state->r.in.client_pid = request->pid;
 110         state->r.in.flags = request->flags;
 111
 112         state->r.in.client_name = talloc_strdup(state, request->client_name);
 113         if (tevent_req_nomem(state->r.in.client_name, req)) {
 114                 return tevent_req_post(req, ev);
 115         }
 116
 117         state->r.in.user = talloc_strdup(state, request->data.chauthtok.user);
 118         if (tevent_req_nomem(state->r.in.user, req)) {
 119                 return tevent_req_post(req, ev);
 120         }
 121
 122         state->r.in.old_password = talloc_strdup(state,
 123                         request->data.chauthtok.oldpass);
 124         if (tevent_req_nomem(state->r.in.old_password, req)) {
 125                 return tevent_req_post(req, ev);
 126         }
 127
 128         state->r.in.new_password = talloc_strdup(state,
 129                         request->data.chauthtok.newpass);
 130         if (tevent_req_nomem(state->r.in.new_password, req)) {
 131                 return tevent_req_post(req, ev);
 132         }
 133
 134         subreq = dcerpc_wbint_PamAuthChangePassword_r_send(state,
 135                                         global_event_context(),
 136                                         dom_child_handle(contact_domain),
 137                                         &state->r);
 138         if (tevent_req_nomem(subreq, req)) {
 139                 return tevent_req_post(req, ev);
 140         }
 141         tevent_req_set_callback(subreq, winbindd_pam_chauthtok_done, req);
 142         return req;
 143 }
 144
 145 static void winbindd_pam_chauthtok_done(struct tevent_req *subreq)
 146 {
 147         struct tevent_req *req = tevent_req_callback_data(
 148                 subreq, struct tevent_req);
 149         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
 150                 req, struct winbindd_pam_chauthtok_state);
 151         NTSTATUS status;
 152
 153         status = dcerpc_wbint_PamAuthChangePassword_r_recv(subreq, state);
 154         TALLOC_FREE(subreq);
 155         if (tevent_req_nterror(req, status)) {
 156                 return;
 157         }
 158
 159         tevent_req_done(req);
 160 }
 161
 162 NTSTATUS winbindd_pam_chauthtok_recv(struct tevent_req *req,
 163                                      struct winbindd_response *response)
 164 {
 165         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
 166                 req, struct winbindd_pam_chauthtok_state);
 167         NTSTATUS status = NT_STATUS_OK;
 168
 169         if (tevent_req_is_nterror(req, &status)) {
 170                 set_auth_errors(response, status);
 171                 return status;
 172         }
 173
 174         response->result = WINBINDD_PENDING;
 175
 176         set_auth_errors(response, state->r.out.result);
 177         if (*state->r.out.dominfo != NULL) {
 178                 fill_in_password_policy(response, *state->r.out.dominfo);
 179         }
 180         response->data.auth.reject_reason = *state->r.out.reject_reason;
 181
 182         if (state->r.in.flags & WBFLAG_PAM_CACHED_LOGIN) {
 183
 184                 /* Update the single sign-on memory creds. */
 185                 status = winbindd_replace_memory_creds(
 186                         state->r.in.user, state->r.in.new_password);
 187
 188                 DEBUG(10, ("winbindd_replace_memory_creds returned %s\n",
 189                            nt_errstr(status)));
 190
 191                 /*
 192                  * When we login from gdm or xdm and password expires,
 193                  * we change password, but there are no memory
 194                  * credentials. So, winbindd_replace_memory_creds()
 195                  * returns NT_STATUS_OBJECT_NAME_NOT_FOUND. This is
 196                  * not a failure.  --- BoYang
 197                  */
 198                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 199                         status = NT_STATUS_OK;
 200                 }
 201         }
 202
 203         return NT_STATUS(response->data.auth.nt_status);
 204 }