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4f43030482
In handling the WINBINDD_PAM_AUTH message winbindd canonicalizes a *copy* of the mapped username, but fails to canonicalize the actual username sent to the backend domain process. When "winbind default domain" is set this can lead to credentials being cached with an index of user: user, not DOMAIN\user. All other code paths that use canonicalize_username() (WINBINDD_PAM_CHAUTHTOK, WINBINDD_PAM_LOGOFF) correctly canonicalize the data sent to the backend. All calls the can cause credentials to be looked up (PAM_CHAUTHTOK etc.) correctly call canonicalize_username() to create the credential lookup key. Jeremy.
144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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async implementation of WINBINDD_PAM_AUTH
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Copyright (C) Volker Lendecke 2010
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "winbindd.h"
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struct winbindd_pam_auth_state {
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struct winbindd_request *request;
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struct winbindd_response *response;
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};
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static void winbindd_pam_auth_done(struct tevent_req *subreq);
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struct tevent_req *winbindd_pam_auth_send(TALLOC_CTX *mem_ctx,
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struct tevent_context *ev,
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struct winbindd_cli_state *cli,
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struct winbindd_request *request)
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{
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struct tevent_req *req, *subreq;
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struct winbindd_pam_auth_state *state;
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struct winbindd_domain *domain;
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fstring name_domain, name_user;
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char *mapped = NULL;
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NTSTATUS status;
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req = tevent_req_create(mem_ctx, &state,
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struct winbindd_pam_auth_state);
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if (req == NULL) {
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return NULL;
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}
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state->request = request;
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/* Ensure null termination */
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request->data.auth.user[sizeof(request->data.auth.user)-1] = '\0';
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request->data.auth.pass[sizeof(request->data.auth.pass)-1] = '\0';
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DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)cli->pid,
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request->data.auth.user));
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if (!check_request_flags(request->flags)) {
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tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER_MIX);
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return tevent_req_post(req, ev);
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}
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/* Parse domain and username */
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status = normalize_name_unmap(state, request->data.auth.user, &mapped);
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/* If the name normalization changed something, copy it over the given
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name */
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if (NT_STATUS_IS_OK(status)
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|| NT_STATUS_EQUAL(status, NT_STATUS_FILE_RENAMED)) {
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fstrcpy(request->data.auth.user, mapped);
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}
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if (!canonicalize_username(request->data.auth.user, name_domain, name_user)) {
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tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
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return tevent_req_post(req, ev);
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}
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domain = find_auth_domain(request->flags, name_domain);
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if (domain == NULL) {
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tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
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return tevent_req_post(req, ev);
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}
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subreq = wb_domain_request_send(state, winbind_event_context(), domain,
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request);
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if (tevent_req_nomem(subreq, req)) {
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return tevent_req_post(req, ev);
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}
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tevent_req_set_callback(subreq, winbindd_pam_auth_done, req);
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return req;
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}
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static void winbindd_pam_auth_done(struct tevent_req *subreq)
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{
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struct tevent_req *req = tevent_req_callback_data(
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subreq, struct tevent_req);
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struct winbindd_pam_auth_state *state = tevent_req_data(
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req, struct winbindd_pam_auth_state);
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int res, err;
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res = wb_domain_request_recv(subreq, state, &state->response, &err);
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TALLOC_FREE(subreq);
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if (res == -1) {
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tevent_req_nterror(req, map_nt_error_from_unix(err));
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return;
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}
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tevent_req_done(req);
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}
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NTSTATUS winbindd_pam_auth_recv(struct tevent_req *req,
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struct winbindd_response *response)
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{
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struct winbindd_pam_auth_state *state = tevent_req_data(
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req, struct winbindd_pam_auth_state);
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NTSTATUS status;
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if (tevent_req_is_nterror(req, &status)) {
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set_auth_errors(response, status);
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return status;
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}
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*response = *state->response;
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response->result = WINBINDD_PENDING;
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state->response = talloc_move(response, &state->response);
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status = NT_STATUS(response->data.auth.nt_status);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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if (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) {
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/* Store in-memory creds for single-signon using ntlm_auth. */
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status = winbindd_add_memory_creds(
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state->request->data.auth.user,
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get_uid_from_request(state->request),
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state->request->data.auth.pass);
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DEBUG(10, ("winbindd_add_memory_creds returned: %s\n",
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nt_errstr(status)));
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}
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return status;
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}
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