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_domain, name_user;
  40         char *mapped = NULL;
  41         NTSTATUS status;
  42
  43         req = tevent_req_create(mem_ctx, &state,
  44                                 struct winbindd_pam_auth_state);
  45         if (req == NULL) {
  46                 return NULL;
  47         }
  48         state->request = request;
  49
  50         /* Ensure null termination */
  51         request->data.auth.user[sizeof(request->data.auth.user)-1] = '\0';
  52         request->data.auth.pass[sizeof(request->data.auth.pass)-1] = '\0';
  53
  54         DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)cli->pid,
  55                   request->data.auth.user));
  56
  57         if (!check_request_flags(request->flags)) {
  58                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
  59                 return tevent_req_post(req, ev);
  60         }
  61
  62         /* Parse domain and username */
  63
  64         status = normalize_name_unmap(state, request->data.auth.user, &mapped);
  65
  66         /* If the name normalization changed something, copy it over the given
  67            name */
  68
  69         if (NT_STATUS_IS_OK(status)
  70             || NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
  71                 fstrcpy(request->data.auth.user, mapped);
  72         }
  73
  74         if (!canonicalize_username(request->data.auth.user, name_domain, name_user)) {
  75                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  76                 return tevent_req_post(req, ev);
  77         }
  78
  79         domain = find_auth_domain(request->flags, name_domain);
  80         if (domain == NULL) {
  81                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
  82                 return tevent_req_post(req, ev);
  83         }
  84
  85         subreq = wb_domain_request_send(state, server_event_context(), domain,
  86                                         request);
  87         if (tevent_req_nomem(subreq, req)) {
  88                 return tevent_req_post(req, ev);
  89         }
  90         tevent_req_set_callback(subreq, winbindd_pam_auth_done, req);
  91         return req;
  92 }
  93
  94 static void winbindd_pam_auth_done(struct tevent_req *subreq)
  95 {
  96         struct tevent_req *req = tevent_req_callback_data(
  97                 subreq, struct tevent_req);
  98         struct winbindd_pam_auth_state *state = tevent_req_data(
  99                 req, struct winbindd_pam_auth_state);
 100         int res, err;
 101
 102         res = wb_domain_request_recv(subreq, state, &state->response, &err);
 103         TALLOC_FREE(subreq);
 104         if (res == -1) {
 105                 tevent_req_nterror(req, map_nt_error_from_unix(err));
 106                 return;
 107         }
 108         tevent_req_done(req);
 109 }
 110
 111 NTSTATUS winbindd_pam_auth_recv(struct tevent_req *req,
 112                                 struct winbindd_response *response)
 113 {
 114         struct winbindd_pam_auth_state *state = tevent_req_data(
 115                 req, struct winbindd_pam_auth_state);
 116         NTSTATUS status;
 117
 118         if (tevent_req_is_nterror(req, &status)) {
 119                 set_auth_errors(response, status);
 120                 return status;
 121         }
 122         *response = *state->response;
 123         response->result = WINBINDD_PENDING;
 124         state->response = talloc_move(response, &state->response);
 125
 126         status = NT_STATUS(response->data.auth.nt_status);
 127         if (!NT_STATUS_IS_OK(status)) {
 128                 return status;
 129         }
 130
 131         if (state->request->flags & WBFLAG_PAM_INFO3_TEXT) {
 132                 bool ok;
 133
 134                 ok = add_trusted_domain_from_auth(
 135                         state->response->data.auth.validation_level,
 136                         &state->response->data.auth.info3,
 137                         &state->response->data.auth.info6);
 138                 if (!ok) {
 139                         DBG_ERR("add_trusted_domain_from_auth failed\n");
 140                         set_auth_errors(response, NT_STATUS_LOGON_FAILURE);
 141                         return NT_STATUS_LOGON_FAILURE;
 142                 }
 143         }
 144
 145         if (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) {
 146
 147                 /* Store in-memory creds for single-signon using ntlm_auth. */
 148
 149                 status = winbindd_add_memory_creds(
 150                         state->request->data.auth.user,
 151                         get_uid_from_request(state->request),
 152                         state->request->data.auth.pass);
 153                 DEBUG(10, ("winbindd_add_memory_creds returned: %s\n",
 154                            nt_errstr(status)));
 155         }
 156
 157         return status;
 158 }