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         fstring namespace, domain, user;
  57         char *mapped_user;
  58         NTSTATUS status;
  59         bool ok;
  60
  61         req = tevent_req_create(mem_ctx, &state,
  62                                 struct winbindd_pam_chauthtok_state);
  63         if (req == NULL) {
  64                 return NULL;
  65         }
  66
  67         /* Ensure null termination */
  68         request->data.chauthtok.user[
  69                 sizeof(request->data.chauthtok.user)-1]='\0';
  70
  71         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)cli->pid,
  72                   request->data.chauthtok.user));
  73
  74         status = normalize_name_unmap(state, request->data.chauthtok.user,
  75                                       &mapped_user);
  76
  77         if (NT_STATUS_IS_OK(status) ||
  78             NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  79                 fstrcpy(request->data.chauthtok.user, mapped_user);
  80         }
  81
  82         ok = canonicalize_username(request->data.chauthtok.user,
  83                                    namespace,
  84                                    domain,
  85                                    user);
  86         if (!ok) {
  87                 DEBUG(10, ("winbindd_pam_chauthtok: canonicalize_username %s "
  88                            "failed with\n", request->data.chauthtok.user));
  89                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  90                 return tevent_req_post(req, ev);
  91         }
  92
  93         contact_domain = find_domain_from_name(namespace);
  94         if (contact_domain == NULL) {
  95                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] "
  96                           "as %s is not a trusted domain\n",
  97                           request->data.chauthtok.user, domain, user, domain));
  98                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  99                 return tevent_req_post(req, ev);
 100         }
 101
 102         state->r.in.client_pid = request->pid;
 103         state->r.in.flags = request->flags;
 104
 105         state->r.in.client_name = talloc_strdup(state, request->client_name);
 106         if (tevent_req_nomem(state->r.in.client_name, req)) {
 107                 return tevent_req_post(req, ev);
 108         }
 109
 110         state->r.in.user = talloc_strdup(state, request->data.chauthtok.user);
 111         if (tevent_req_nomem(state->r.in.user, req)) {
 112                 return tevent_req_post(req, ev);
 113         }
 114
 115         state->r.in.old_password = talloc_strdup(state,
 116                         request->data.chauthtok.oldpass);
 117         if (tevent_req_nomem(state->r.in.old_password, req)) {
 118                 return tevent_req_post(req, ev);
 119         }
 120
 121         state->r.in.new_password = talloc_strdup(state,
 122                         request->data.chauthtok.newpass);
 123         if (tevent_req_nomem(state->r.in.new_password, req)) {
 124                 return tevent_req_post(req, ev);
 125         }
 126
 127         subreq = dcerpc_wbint_PamAuthChangePassword_r_send(state,
 128                                         global_event_context(),
 129                                         dom_child_handle(contact_domain),
 130                                         &state->r);
 131         if (tevent_req_nomem(subreq, req)) {
 132                 return tevent_req_post(req, ev);
 133         }
 134         tevent_req_set_callback(subreq, winbindd_pam_chauthtok_done, req);
 135         return req;
 136 }
 137
 138 static void winbindd_pam_chauthtok_done(struct tevent_req *subreq)
 139 {
 140         struct tevent_req *req = tevent_req_callback_data(
 141                 subreq, struct tevent_req);
 142         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
 143                 req, struct winbindd_pam_chauthtok_state);
 144         NTSTATUS status;
 145
 146         status = dcerpc_wbint_PamAuthChangePassword_r_recv(subreq, state);
 147         TALLOC_FREE(subreq);
 148         if (tevent_req_nterror(req, status)) {
 149                 return;
 150         }
 151
 152         tevent_req_done(req);
 153 }
 154
 155 NTSTATUS winbindd_pam_chauthtok_recv(struct tevent_req *req,
 156                                      struct winbindd_response *response)
 157 {
 158         struct winbindd_pam_chauthtok_state *state = tevent_req_data(
 159                 req, struct winbindd_pam_chauthtok_state);
 160         NTSTATUS status = NT_STATUS_OK;
 161
 162         if (tevent_req_is_nterror(req, &status)) {
 163                 set_auth_errors(response, status);
 164                 return status;
 165         }
 166
 167         response->result = WINBINDD_PENDING;
 168
 169         set_auth_errors(response, state->r.out.result);
 170         if (*state->r.out.dominfo != NULL) {
 171                 fill_in_password_policy(response, *state->r.out.dominfo);
 172         }
 173         response->data.auth.reject_reason = *state->r.out.reject_reason;
 174
 175         if (state->r.in.flags & WBFLAG_PAM_CACHED_LOGIN) {
 176
 177                 /* Update the single sign-on memory creds. */
 178                 status = winbindd_replace_memory_creds(
 179                         state->r.in.user, state->r.in.new_password);
 180
 181                 DEBUG(10, ("winbindd_replace_memory_creds returned %s\n",
 182                            nt_errstr(status)));
 183
 184                 /*
 185                  * When we login from gdm or xdm and password expires,
 186                  * we change password, but there are no memory
 187                  * crendentials So, winbindd_replace_memory_creds()
 188                  * returns NT_STATUS_OBJECT_NAME_NOT_FOUND. This is
 189                  * not a failure.  --- BoYang
 190                  */
 191                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
 192                         status = NT_STATUS_OK;
 193                 }
 194         }
 195
 196         return NT_STATUS(response->data.auth.nt_status);
 197 }