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

/*
   Unix SMB/CIFS implementation.
   async implementation of WINBINDD_PAM_AUTH
   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_auth_state {
        struct winbindd_request *request;
        struct winbindd_response *response;
};

static void winbindd_pam_auth_done(struct tevent_req *subreq);

struct tevent_req *winbindd_pam_auth_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_auth_state *state;
        struct winbindd_domain *domain;
        fstring name_domain, name_user;
        char *mapped = NULL;
        NTSTATUS status;

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

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

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

        if (!check_request_flags(request->flags)) {
                tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
                return tevent_req_post(req, ev);
        }

        /* Parse domain and username */

        status = normalize_name_unmap(state, request->data.auth.user, &mapped);

        /* If the name normalization changed something, copy it over the given
           name */

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

        if (!canonicalize_username(request->data.auth.user, name_domain, name_user)) {
                tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
                return tevent_req_post(req, ev);
        }

        domain = find_auth_domain(request->flags, name_domain);
        if (domain == NULL) {
                tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
                return tevent_req_post(req, ev);
        }

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

static void winbindd_pam_auth_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct winbindd_pam_auth_state *state = tevent_req_data(
                req, struct winbindd_pam_auth_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_auth_recv(struct tevent_req *req,
                                struct winbindd_response *response)
{
        struct winbindd_pam_auth_state *state = tevent_req_data(
                req, struct winbindd_pam_auth_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) {

                /* Store in-memory creds for single-signon using ntlm_auth. */

                status = winbindd_add_memory_creds(
                        state->request->data.auth.user,
                        get_uid_from_request(state->request),
                        state->request->data.auth.pass);
                DEBUG(10, ("winbindd_add_memory_creds returned: %s\n",
                           nt_errstr(status)));
        }

        return status;
}