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
  23 struct winbindd_pam_auth_state {
  24         struct winbindd_request *request;
  25         struct winbindd_response *response;
  26 };
  27
  28 static void winbindd_pam_auth_done(struct tevent_req *subreq);
  29
  30 struct tevent_req *winbindd_pam_auth_send(TALLOC_CTX *mem_ctx,
  31                                           struct tevent_context *ev,
  32                                           struct winbindd_cli_state *cli,
  33                                           struct winbindd_request *request)
  34 {
  35         struct tevent_req *req, *subreq;
  36         struct winbindd_pam_auth_state *state;
  37         struct winbindd_domain *domain;
  38         fstring name_domain, name_user, mapped_user;
  39         char *mapped = NULL;
  40         NTSTATUS status;
  41
  42         req = tevent_req_create(mem_ctx, &state,
  43                                 struct winbindd_pam_auth_state);
  44         if (req == NULL) {
  45                 return NULL;
  46         }
  47         state->request = request;
  48
  49         /* Ensure null termination */
  50         request->data.auth.user[sizeof(request->data.auth.user)-1] = '\0';
  51         request->data.auth.pass[sizeof(request->data.auth.pass)-1] = '\0';
  52
  53         DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)cli->pid,
  54                   request->data.auth.user));
  55
  56         if (!check_request_flags(request->flags)) {
  57                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
  58                 return tevent_req_post(req, ev);
  59         }
  60
  61         /* Parse domain and username */
  62
  63         status = normalize_name_unmap(state, request->data.auth.user, &mapped);
  64
  65         /* If the name normalization didnt' actually do anything,
  66            just use the original name */
  67
  68         if (NT_STATUS_IS_OK(status)
  69             || NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  70                 fstrcpy(mapped_user, mapped);
  71         } else {
  72                 fstrcpy(mapped_user, request->data.auth.user);
  73         }
  74
  75         if (!canonicalize_username(mapped_user, name_domain, name_user)) {
  76                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  77                 return tevent_req_post(req, ev);
  78         }
  79
  80         domain = find_auth_domain(request->flags, name_domain);
  81         if (domain == NULL) {
  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, winbind_event_context(), domain,
  87                                         request);
  88         if (tevent_req_nomem(subreq, req)) {
  89                 return tevent_req_post(req, ev);
  90         }
  91         tevent_req_set_callback(subreq, winbindd_pam_auth_done, req);
  92         return req;
  93 }
  94
  95 static void winbindd_pam_auth_done(struct tevent_req *subreq)
  96 {
  97         struct tevent_req *req = tevent_req_callback_data(
  98                 subreq, struct tevent_req);
  99         struct winbindd_pam_auth_state *state = tevent_req_data(
 100                 req, struct winbindd_pam_auth_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_auth_recv(struct tevent_req *req,
 113                                 struct winbindd_response *response)
 114 {
 115         struct winbindd_pam_auth_state *state = tevent_req_data(
 116                 req, struct winbindd_pam_auth_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                 /* Store in-memory creds for single-signon using ntlm_auth. */
 135
 136                 status = winbindd_add_memory_creds(
 137                         state->request->data.auth.user,
 138                         get_uid_from_request(state->request),
 139                         state->request->data.auth.pass);
 140                 DEBUG(10, ("winbindd_add_memory_creds returned: %s\n",
 141                            nt_errstr(status)));
 142         }
 143
 144         return status;
 145 }