Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 183 insertions, 0 deletions

diff --git a/source3/winbindd/winbindd_pam_logoff.c b/source3/winbindd/winbindd_pam_logoff.c
new file mode 100644
index 0000000..c799eb5
--- /dev/null
+++ b/source3/winbindd/winbindd_pam_logoff.c
@@ -0,0 +1,183 @@
+/*
+   Unix SMB/CIFS implementation.
+   async implementation of WINBINDD_PAM_LOGOFF
+   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 "util/debug.h"
+#include "winbindd.h"
+#include "lib/global_contexts.h"
+#include "librpc/gen_ndr/ndr_winbind_c.h"
+#include "lib/util/string_wrappers.h"
+
+struct winbindd_pam_logoff_state {
+	struct wbint_PamLogOff r;
+};
+
+static void winbindd_pam_logoff_done(struct tevent_req *subreq);
+
+struct tevent_req *winbindd_pam_logoff_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_logoff_state *state;
+	struct winbindd_domain *domain;
+	char *name_namespace = NULL;
+	char *name_domain = NULL;
+	char *user = NULL;
+	char *logoff_user = NULL;
+
+	uid_t caller_uid;
+	gid_t caller_gid;
+	int res;
+	bool ok;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct winbindd_pam_logoff_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	D_NOTICE("[%s (%u)] Winbind external command PAM_LOGOFF start.\n"
+		 "Username '%s' is used during logoff.\n",
+		 cli->client_name,
+		 (unsigned int)cli->pid,
+		 request->data.auth.user);
+	/* Ensure null termination */
+	/* Ensure null termination */
+	request->data.logoff.user[sizeof(request->data.logoff.user)-1]='\0';
+	request->data.logoff.krb5ccname[
+		sizeof(request->data.logoff.krb5ccname)-1]='\0';
+
+	if (request->data.logoff.uid == (uid_t)-1) {
+		goto failed;
+	}
+
+	logoff_user = request->data.logoff.user;
+
+	ok = canonicalize_username(req,
+				   &logoff_user,
+				   &name_namespace,
+				   &name_domain,
+				   &user);
+	if (!ok) {
+		goto failed;
+	}
+
+	fstrcpy(request->data.logoff.user, logoff_user);
+
+	domain = find_auth_domain(request->flags, name_namespace);
+	if (domain == NULL) {
+		goto failed;
+	}
+
+	caller_uid = (uid_t)-1;
+
+	res = getpeereid(cli->sock, &caller_uid, &caller_gid);
+	if (res != 0) {
+		D_WARNING("winbindd_pam_logoff: failed to check peerid: %s\n",
+			strerror(errno));
+		goto failed;
+	}
+
+	switch (caller_uid) {
+	case -1:
+		goto failed;
+	case 0:
+		/* root must be able to logoff any user - gd */
+		break;
+	default:
+		if (caller_uid != request->data.logoff.uid) {
+			D_WARNING("caller requested invalid uid\n");
+			goto failed;
+		}
+		break;
+	}
+
+	state->r.in.client_name = talloc_strdup(state, request->client_name);
+	if (tevent_req_nomem(state->r.in.client_name, req)) {
+		return tevent_req_post(req, ev);
+	}
+	state->r.in.client_pid = request->pid;
+
+	state->r.in.flags = request->flags;
+	state->r.in.user = talloc_strdup(state, request->data.logoff.user);
+	if (tevent_req_nomem(state->r.in.user, req)) {
+		return tevent_req_post(req, ev);
+	}
+	state->r.in.uid = request->data.logoff.uid;
+	state->r.in.krb5ccname = talloc_strdup(state,
+					request->data.logoff.krb5ccname);
+	if (tevent_req_nomem(state->r.in.krb5ccname, req)) {
+		return tevent_req_post(req, ev);
+	}
+
+	subreq = dcerpc_wbint_PamLogOff_r_send(state,
+					       global_event_context(),
+					       dom_child_handle(domain),
+					       &state->r);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, winbindd_pam_logoff_done, req);
+	return req;
+
+failed:
+	tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
+	return tevent_req_post(req, ev);
+}
+
+static void winbindd_pam_logoff_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct winbindd_pam_logoff_state *state = tevent_req_data(
+		req, struct winbindd_pam_logoff_state);
+	NTSTATUS status;
+
+	status = dcerpc_wbint_PamLogOff_r_recv(subreq, state);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	tevent_req_done(req);
+}
+
+NTSTATUS winbindd_pam_logoff_recv(struct tevent_req *req,
+				  struct winbindd_response *response)
+{
+	struct winbindd_pam_logoff_state *state = tevent_req_data(
+		req, struct winbindd_pam_logoff_state);
+	NTSTATUS status = NT_STATUS_OK;
+
+	D_NOTICE("Winbind external command PAM_LOGOFF end.\n");
+	if (tevent_req_is_nterror(req, &status)) {
+		set_auth_errors(response, status);
+		return status;
+	}
+
+	response->result = WINBINDD_PENDING;
+	set_auth_errors(response, state->r.out.result);
+
+	if (NT_STATUS_IS_OK(state->r.out.result)) {
+		winbindd_delete_memory_creds(state->r.in.user);
+	}
+
+	return NT_STATUS(response->data.auth.nt_status);
+}