source: trunk/server/source3/winbindd/winbindd_pam_chauthtok.c

/*
   Unix SMB/CIFS implementation.
   async implementation of WINBINDD_PAM_CHAUTHTOK
   Copyright (C) Volker Lendecke 2010

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "winbindd.h"

struct winbindd_pam_chauthtok_state {
        struct winbindd_request *request;
        struct winbindd_response *response;
};

static void winbindd_pam_chauthtok_done(struct tevent_req *subreq);

struct tevent_req *winbindd_pam_chauthtok_send(
        TALLOC_CTX *mem_ctx,
        struct tevent_context *ev,
        struct winbindd_cli_state *cli,
        struct winbindd_request *request)
{
        struct tevent_req *req, *subreq;
        struct winbindd_pam_chauthtok_state *state;
        struct winbindd_domain *contact_domain;
        fstring domain, user;
        char *mapped_user;
        NTSTATUS status;

        req = tevent_req_create(mem_ctx, &state,
                                struct winbindd_pam_chauthtok_state);
        if (req == NULL) {
                return NULL;
        }
        state->request = request;

        /* Ensure null termination */
        request->data.chauthtok.user[
                sizeof(request->data.chauthtok.user)-1]='\0';

        DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)cli->pid,
                  request->data.chauthtok.user));

        status = normalize_name_unmap(state, request->data.chauthtok.user,
                                      &mapped_user);

        if (NT_STATUS_IS_OK(status) ||
            NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
                fstrcpy(request->data.chauthtok.user, mapped_user);
        }

        if (!canonicalize_username(request->data.chauthtok.user, domain,
                                   user)) {
                DEBUG(10, ("winbindd_pam_chauthtok: canonicalize_username %s "
                           "failed with\n", request->data.chauthtok.user));
                tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
                return tevent_req_post(req, ev);
        }

        contact_domain = find_domain_from_name(domain);
        if (contact_domain == NULL) {
                DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] "
                          "as %s is not a trusted domain\n",
                          request->data.chauthtok.user, domain, user, domain));
                tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
                return tevent_req_post(req, ev);
        }

        subreq = wb_domain_request_send(state, winbind_event_context(),
                                        contact_domain, request);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, winbindd_pam_chauthtok_done, req);
        return req;
}

static void winbindd_pam_chauthtok_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct winbindd_pam_chauthtok_state *state = tevent_req_data(
                req, struct winbindd_pam_chauthtok_state);
        int res, err;

        res = wb_domain_request_recv(subreq, state, &state->response, &err);
        TALLOC_FREE(subreq);
        if (res == -1) {
                tevent_req_nterror(req, map_nt_error_from_unix(err));
                return;
        }
        tevent_req_done(req);
}

NTSTATUS winbindd_pam_chauthtok_recv(struct tevent_req *req,
                                     struct winbindd_response *response)
{
        struct winbindd_pam_chauthtok_state *state = tevent_req_data(
                req, struct winbindd_pam_chauthtok_state);
        NTSTATUS status;

        if (tevent_req_is_nterror(req, &status)) {
                set_auth_errors(response, status);
                return status;
        }
        *response = *state->response;
        response->result = WINBINDD_PENDING;
        state->response = talloc_move(response, &state->response);

        status = NT_STATUS(response->data.auth.nt_status);
        if (!NT_STATUS_IS_OK(status)) {
                return status;
        }

        if (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) {

                /* Update the single sign-on memory creds. */
                status = winbindd_replace_memory_creds(
                        state->request->data.chauthtok.user,
                        state->request->data.chauthtok.newpass);

                DEBUG(10, ("winbindd_replace_memory_creds returned %s\n",
                           nt_errstr(status)));

                /*
                 * When we login from gdm or xdm and password expires,
                 * we change password, but there are no memory
                 * crendentials So, winbindd_replace_memory_creds()
                 * returns NT_STATUS_OBJECT_NAME_NOT_FOUND. This is
                 * not a failure.  --- BoYang
                 */
                if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
                        status = NT_STATUS_OK;
                }
        }
        return status;
}