Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

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

1 files changed, 322 insertions, 0 deletions

diff --git a/source4/auth/ntlm/auth_winbind.c b/source4/auth/ntlm/auth_winbind.c
new file mode 100644
index 0000000..719d877
--- /dev/null
+++ b/source4/auth/ntlm/auth_winbind.c
@@ -0,0 +1,322 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Winbind authentication mechnism
+
+   Copyright (C) Tim Potter 2000
+   Copyright (C) Andrew Bartlett 2001 - 2002
+   Copyright (C) Stefan Metzmacher 2005
+   
+   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 <tevent.h>
+#include "../lib/util/tevent_ntstatus.h"
+#include "auth/auth.h"
+#include "auth/ntlm/auth_proto.h"
+#include "librpc/gen_ndr/ndr_winbind_c.h"
+#include "lib/messaging/irpc.h"
+#include "param/param.h"
+#include "nsswitch/libwbclient/wbclient.h"
+#include "auth/auth_sam_reply.h"
+#include "libcli/security/security.h"
+#include "dsdb/samdb/samdb.h"
+#include "auth/auth_sam.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+_PUBLIC_ NTSTATUS auth4_winbind_init(TALLOC_CTX *);
+
+static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
+				   TALLOC_CTX *mem_ctx,
+				   const struct auth_usersupplied_info *user_info)
+{
+	if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	/* TODO: maybe limit the user scope to remote users only */
+	return NT_STATUS_OK;
+}
+
+struct winbind_check_password_state {
+	struct auth_method_context *ctx;
+	const struct auth_usersupplied_info *user_info;
+	struct winbind_SamLogon req;
+	struct auth_user_info_dc *user_info_dc;
+	bool authoritative;
+};
+
+static void winbind_check_password_done(struct tevent_req *subreq);
+
+/*
+ Authenticate a user with a challenge/response
+ using IRPC to the winbind task
+*/
+static struct tevent_req *winbind_check_password_send(TALLOC_CTX *mem_ctx,
+				struct tevent_context *ev,
+				struct auth_method_context *ctx,
+				const struct auth_usersupplied_info *user_info)
+{
+	struct tevent_req *req = NULL;
+	struct winbind_check_password_state *state = NULL;
+	NTSTATUS status;
+	struct dcerpc_binding_handle *irpc_handle;
+	const struct auth_usersupplied_info *user_info_new;
+	struct netr_IdentityInfo *identity_info;
+	struct imessaging_context *msg_ctx;
+	struct tevent_req *subreq = NULL;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct winbind_check_password_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->ctx = ctx;
+	state->user_info = user_info;
+	state->authoritative = true;
+
+	msg_ctx = imessaging_client_init(state, ctx->auth_ctx->lp_ctx, ev);
+	if (msg_ctx == NULL) {
+		DEBUG(1, ("imessaging_init failed\n"));
+		tevent_req_nterror(req, NT_STATUS_INVALID_SERVER_STATE);
+		return tevent_req_post(req, ev);
+	}
+
+	irpc_handle = irpc_binding_handle_by_name(state, msg_ctx,
+						  "winbind_server",
+						  &ndr_table_winbind);
+	if (irpc_handle == NULL) {
+		DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, " 
+			  "no winbind_server running!\n",
+			  user_info->client.domain_name, user_info->client.account_name));
+		tevent_req_nterror(req, NT_STATUS_NO_LOGON_SERVERS);
+		return tevent_req_post(req, ev);
+	}
+
+	/*
+	 * 120 seconds should be enough even for trusted domains.
+	 *
+	 * Currently winbindd has a much lower limit.
+	 * And tests with Windows RODCs show that it
+	 * returns NO_LOGON_SERVERS after 90-100 seconds
+	 * if it can't reach any RWDC.
+	 */
+	dcerpc_binding_handle_set_timeout(irpc_handle, 120);
+
+	if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
+		struct netr_PasswordInfo *password_info;
+
+		status = encrypt_user_info(state, ctx->auth_ctx, AUTH_PASSWORD_HASH,
+					   user_info, &user_info_new);
+		if (tevent_req_nterror(req, status)) {
+			return tevent_req_post(req, ev);
+		}
+		user_info = user_info_new;
+
+		password_info = talloc_zero(state, struct netr_PasswordInfo);
+		if (tevent_req_nomem(password_info, req)) {
+			return tevent_req_post(req, ev);
+		}
+
+		password_info->lmpassword = *user_info->password.hash.lanman;
+		password_info->ntpassword = *user_info->password.hash.nt;
+
+		identity_info = &password_info->identity_info;
+		state->req.in.logon_level	= 1;
+		state->req.in.logon.password= password_info;
+	} else {
+		struct netr_NetworkInfo *network_info;
+		uint8_t chal[8];
+
+		status = encrypt_user_info(state, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
+					   user_info, &user_info_new);
+		if (tevent_req_nterror(req, status)) {
+			return tevent_req_post(req, ev);
+		}
+		user_info = user_info_new;
+
+		network_info = talloc_zero(state, struct netr_NetworkInfo);
+		if (tevent_req_nomem(network_info, req)) {
+			return tevent_req_post(req, ev);
+		}
+
+		status = auth_get_challenge(ctx->auth_ctx, chal);
+		if (tevent_req_nterror(req, status)) {
+			return tevent_req_post(req, ev);
+		}
+
+		memcpy(network_info->challenge, chal, sizeof(network_info->challenge));
+
+		network_info->nt.length = user_info->password.response.nt.length;
+		network_info->nt.data	= user_info->password.response.nt.data;
+
+		network_info->lm.length = user_info->password.response.lanman.length;
+		network_info->lm.data	= user_info->password.response.lanman.data;
+
+		identity_info = &network_info->identity_info;
+		state->req.in.logon_level	= 2;
+		state->req.in.logon.network = network_info;
+	}
+
+	identity_info->domain_name.string	= user_info->client.domain_name;
+	identity_info->parameter_control	= user_info->logon_parameters; /* see MSV1_0_* */
+	identity_info->logon_id			= user_info->logon_id;
+	identity_info->account_name.string	= user_info->client.account_name;
+	identity_info->workstation.string	= user_info->workstation_name;
+
+	state->req.in.validation_level = 6;
+
+	subreq = dcerpc_winbind_SamLogon_r_send(state, ev, irpc_handle,
+						&state->req);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq,
+				winbind_check_password_done,
+				req);
+
+	return req;
+}
+
+static void winbind_check_password_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+		tevent_req_callback_data(subreq,
+		struct tevent_req);
+	struct winbind_check_password_state *state =
+		tevent_req_data(req,
+		struct winbind_check_password_state);
+	struct auth_method_context *ctx = state->ctx;
+	const struct auth_usersupplied_info *user_info = state->user_info;
+	struct ldb_dn *domain_dn = NULL;
+	const char *nt4_domain = NULL;
+	const char *nt4_account = NULL;
+	struct ldb_message *msg = NULL;
+	NTSTATUS status;
+
+	status = dcerpc_winbind_SamLogon_r_recv(subreq, state);
+	if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
+		status = NT_STATUS_NO_LOGON_SERVERS;
+	}
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	status = state->req.out.result;
+	if (!NT_STATUS_IS_OK(status)) {
+		if (!state->req.out.authoritative) {
+			state->authoritative = false;
+		}
+		tevent_req_nterror(req, status);
+		return;
+	}
+
+	status = make_user_info_dc_netlogon_validation(state,
+						      user_info->client.account_name,
+						      state->req.in.validation_level,
+						      &state->req.out.validation,
+						      true, /* This user was authenticated */
+						      &state->user_info_dc);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	nt4_domain = state->user_info_dc->info->domain_name;
+	nt4_account = state->user_info_dc->info->account_name;
+
+	if (lpcfg_is_mydomain(ctx->auth_ctx->lp_ctx, nt4_domain)) {
+		domain_dn = ldb_get_default_basedn(ctx->auth_ctx->sam_ctx);
+	}
+
+	if (domain_dn != NULL) {
+		/*
+		 * At best, reset the badPwdCount to 0 if the account exists.
+		 * This means that lockouts happen at a badPwdCount earlier than
+		 * normal, but makes it more fault tolerant.
+		 */
+		status = authsam_search_account(state, ctx->auth_ctx->sam_ctx,
+						nt4_account, domain_dn, &msg);
+		if (NT_STATUS_IS_OK(status)) {
+			status = authsam_logon_success_accounting(
+				ctx->auth_ctx->sam_ctx, msg,
+				domain_dn,
+				user_info->flags & USER_INFO_INTERACTIVE_LOGON,
+				NULL, NULL);
+			if (tevent_req_nterror(req, status)) {
+				return;
+			}
+		}
+	}
+
+	/*
+	 * We need to expand group memberships within our local domain,
+	 * as the token might be generated by a trusted domain, unless we're
+	 * an RODC.
+	 */
+	status = authsam_update_user_info_dc(state->user_info_dc,
+					     ctx->auth_ctx->sam_ctx,
+					     state->user_info_dc);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	tevent_req_done(req);
+}
+
+static NTSTATUS winbind_check_password_recv(struct tevent_req *req,
+					    TALLOC_CTX *mem_ctx,
+					    struct auth_user_info_dc **user_info_dc,
+					    bool *pauthoritative)
+{
+	struct winbind_check_password_state *state =
+		tevent_req_data(req,
+		struct winbind_check_password_state);
+	NTSTATUS status = NT_STATUS_OK;
+
+	*pauthoritative = state->authoritative;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	*user_info_dc = talloc_move(mem_ctx, &state->user_info_dc);
+
+	tevent_req_received(req);
+	return NT_STATUS_OK;
+}
+
+static const struct auth_operations winbind_ops = {
+	.name			= "winbind",
+	.want_check		= winbind_want_check,
+	.check_password_send	= winbind_check_password_send,
+	.check_password_recv	= winbind_check_password_recv
+};
+
+_PUBLIC_ NTSTATUS auth4_winbind_init(TALLOC_CTX *ctx)
+{
+	NTSTATUS ret;
+
+	ret = auth_register(ctx, &winbind_ops);
+	if (!NT_STATUS_IS_OK(ret)) {
+		DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
+		return ret;
+	}
+
+	return NT_STATUS_OK;
+}