source3/winbindd/winbindd_pam_auth.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    async implementation of WINBINDD_PAM_AUTH
   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 "libcli/security/dom_sid.h"
  23
  24 struct winbindd_pam_auth_state {
  25         struct winbindd_request *request;
  26         struct winbindd_response *response;
  27 };
  28
  29 static void winbindd_pam_auth_done(struct tevent_req *subreq);
  30
  31 struct tevent_req *winbindd_pam_auth_send(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_auth_state *state;
  38         struct winbindd_domain *domain;
  39         fstring name_namespace, name_domain, name_user;
  40         char *mapped = NULL;
  41         NTSTATUS status;
  42         bool ok;
  43
  44         req = tevent_req_create(mem_ctx, &state,
  45                                 struct winbindd_pam_auth_state);
  46         if (req == NULL) {
  47                 return NULL;
  48         }
  49         state->request = request;
  50
  51         /* Ensure null termination */
  52         request->data.auth.user[sizeof(request->data.auth.user)-1] = '\0';
  53         request->data.auth.pass[sizeof(request->data.auth.pass)-1] = '\0';
  54
  55         DBG_NOTICE("[%s (%u)]: pam auth %s\n",
  56                    cli->client_name,
  57                    (unsigned int)cli->pid,
  58                    request->data.auth.user);
  59
  60         if (!check_request_flags(request->flags)) {
  61                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
  62                 return tevent_req_post(req, ev);
  63         }
  64
  65         /* Parse domain and username */
  66
  67         status = normalize_name_unmap(state, request->data.auth.user, &mapped);
  68
  69         /* If the name normalization changed something, copy it over the given
  70            name */
  71
  72         if (NT_STATUS_IS_OK(status)
  73             || NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  74                 fstrcpy(request->data.auth.user, mapped);
  75         }
  76
  77         ok = canonicalize_username(request->data.auth.user,
  78                                    name_namespace,
  79                                    name_domain,
  80                                    name_user);
  81         if (!ok) {
  82                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  83                 return tevent_req_post(req, ev);
  84         }
  85
  86         domain = find_auth_domain(request->flags, name_namespace);
  87         if (domain == NULL) {
  88                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  89                 return tevent_req_post(req, ev);
  90         }
  91
  92         subreq = wb_domain_request_send(state, global_event_context(), domain,
  93                                         request);
  94         if (tevent_req_nomem(subreq, req)) {
  95                 return tevent_req_post(req, ev);
  96         }
  97         tevent_req_set_callback(subreq, winbindd_pam_auth_done, req);
  98         return req;
  99 }
 100
 101 static void winbindd_pam_auth_done(struct tevent_req *subreq)
 102 {
 103         struct tevent_req *req = tevent_req_callback_data(
 104                 subreq, struct tevent_req);
 105         struct winbindd_pam_auth_state *state = tevent_req_data(
 106                 req, struct winbindd_pam_auth_state);
 107         int res, err;
 108
 109         res = wb_domain_request_recv(subreq, state, &state->response, &err);
 110         TALLOC_FREE(subreq);
 111         if (res == -1) {
 112                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 113                 return;
 114         }
 115         tevent_req_done(req);
 116 }
 117
 118 NTSTATUS winbindd_pam_auth_recv(struct tevent_req *req,
 119                                 struct winbindd_response *response)
 120 {
 121         struct winbindd_pam_auth_state *state = tevent_req_data(
 122                 req, struct winbindd_pam_auth_state);
 123         NTSTATUS status;
 124
 125         if (tevent_req_is_nterror(req, &status)) {
 126                 set_auth_errors(response, status);
 127                 return status;
 128         }
 129         *response = *state->response;
 130         response->result = WINBINDD_PENDING;
 131         state->response = talloc_move(response, &state->response);
 132
 133         status = NT_STATUS(response->data.auth.nt_status);
 134         if (!NT_STATUS_IS_OK(status)) {
 135                 return status;
 136         }
 137
 138         if (state->request->flags & WBFLAG_PAM_INFO3_TEXT) {
 139                 bool ok;
 140
 141                 ok = add_trusted_domain_from_auth(
 142                         state->response->data.auth.validation_level,
 143                         &state->response->data.auth.info3,
 144                         &state->response->data.auth.info6);
 145                 if (!ok) {
 146                         DBG_ERR("add_trusted_domain_from_auth failed\n");
 147                         set_auth_errors(response, NT_STATUS_LOGON_FAILURE);
 148                         return NT_STATUS_LOGON_FAILURE;
 149                 }
 150         }
 151
 152         if (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) {
 153
 154                 /* Store in-memory creds for single-signon using ntlm_auth. */
 155
 156                 status = winbindd_add_memory_creds(
 157                         state->request->data.auth.user,
 158                         get_uid_from_request(state->request),
 159                         state->request->data.auth.pass);
 160                 DEBUG(10, ("winbindd_add_memory_creds returned: %s\n",
 161                            nt_errstr(status)));
 162         }
 163
 164         return status;
 165 }