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-rw-r--r--auth/gensec/ncalrpc.c356
1 files changed, 356 insertions, 0 deletions
diff --git a/auth/gensec/ncalrpc.c b/auth/gensec/ncalrpc.c
new file mode 100644
index 0000000..f845947
--- /dev/null
+++ b/auth/gensec/ncalrpc.c
@@ -0,0 +1,356 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ dcerpc ncalrpc as system operations
+
+ Copyright (C) 2014 Andreas Schneider <asn@samba.org>
+ Copyright (C) 2014 Stefan Metzmacher <metze@samba.org>
+
+ 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/gensec/gensec.h"
+#include "auth/gensec/gensec_internal.h"
+#include "librpc/gen_ndr/dcerpc.h"
+#include "lib/param/param.h"
+#include "tsocket.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+_PUBLIC_ NTSTATUS gensec_ncalrpc_as_system_init(TALLOC_CTX *ctx);
+
+struct gensec_ncalrpc_state {
+ enum {
+ GENSEC_NCALRPC_START,
+ GENSEC_NCALRPC_MORE,
+ GENSEC_NCALRPC_DONE,
+ GENSEC_NCALRPC_ERROR,
+ } step;
+
+ struct auth_user_info_dc *user_info_dc;
+};
+
+static NTSTATUS gensec_ncalrpc_client_start(struct gensec_security *gensec_security)
+{
+ struct gensec_ncalrpc_state *state;
+
+ state = talloc_zero(gensec_security,
+ struct gensec_ncalrpc_state);
+ if (state == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ gensec_security->private_data = state;
+
+ state->step = GENSEC_NCALRPC_START;
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS gensec_ncalrpc_server_start(struct gensec_security *gensec_security)
+{
+ struct gensec_ncalrpc_state *state;
+
+ state = talloc_zero(gensec_security,
+ struct gensec_ncalrpc_state);
+ if (state == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ gensec_security->private_data = state;
+
+ state->step = GENSEC_NCALRPC_START;
+ return NT_STATUS_OK;
+}
+
+struct gensec_ncalrpc_update_state {
+ NTSTATUS status;
+ DATA_BLOB out;
+};
+
+static NTSTATUS gensec_ncalrpc_update_internal(
+ struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB in,
+ DATA_BLOB *out);
+
+static struct tevent_req *gensec_ncalrpc_update_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct gensec_security *gensec_security,
+ const DATA_BLOB in)
+{
+ struct tevent_req *req;
+ struct gensec_ncalrpc_update_state *state = NULL;
+ NTSTATUS status;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct gensec_ncalrpc_update_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ status = gensec_ncalrpc_update_internal(gensec_security,
+ state, in,
+ &state->out);
+ state->status = status;
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ status = NT_STATUS_OK;
+ }
+ if (tevent_req_nterror(req, status)) {
+ return tevent_req_post(req, ev);
+ }
+
+ tevent_req_done(req);
+ return tevent_req_post(req, ev);
+}
+
+static NTSTATUS gensec_ncalrpc_update_internal(
+ struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ const DATA_BLOB in,
+ DATA_BLOB *out)
+{
+ struct gensec_ncalrpc_state *state =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gensec_ncalrpc_state);
+ DATA_BLOB magic_req = data_blob_string_const("NCALRPC_AUTH_TOKEN");
+ DATA_BLOB magic_ok = data_blob_string_const("NCALRPC_AUTH_OK");
+ DATA_BLOB magic_fail = data_blob_string_const("NCALRPC_AUTH_FAIL");
+ char *unix_path = NULL;
+ int cmp;
+ NTSTATUS status;
+
+ *out = data_blob_null;
+
+ if (state->step >= GENSEC_NCALRPC_DONE) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ switch (gensec_security->gensec_role) {
+ case GENSEC_CLIENT:
+ switch (state->step) {
+ case GENSEC_NCALRPC_START:
+ *out = data_blob_dup_talloc(mem_ctx, magic_req);
+ if (out->data == NULL) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ state->step = GENSEC_NCALRPC_MORE;
+ return NT_STATUS_MORE_PROCESSING_REQUIRED;
+
+ case GENSEC_NCALRPC_MORE:
+ cmp = data_blob_cmp(&in, &magic_ok);
+ if (cmp != 0) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ state->step = GENSEC_NCALRPC_DONE;
+ return NT_STATUS_OK;
+
+ case GENSEC_NCALRPC_DONE:
+ case GENSEC_NCALRPC_ERROR:
+ break;
+ }
+
+ state->step = GENSEC_NCALRPC_ERROR;
+ return NT_STATUS_INTERNAL_ERROR;
+
+ case GENSEC_SERVER:
+ if (state->step != GENSEC_NCALRPC_START) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ cmp = data_blob_cmp(&in, &magic_req);
+ if (cmp != 0) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ *out = data_blob_dup_talloc(mem_ctx, magic_fail);
+ if (out->data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ if (gensec_security->remote_addr == NULL) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ *out = data_blob_dup_talloc(mem_ctx, magic_fail);
+ if (out->data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ unix_path = tsocket_address_unix_path(gensec_security->remote_addr,
+ state);
+ if (unix_path == NULL) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ *out = data_blob_dup_talloc(mem_ctx, magic_fail);
+ if (out->data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ cmp = strcmp(unix_path, AS_SYSTEM_MAGIC_PATH_TOKEN);
+ TALLOC_FREE(unix_path);
+ if (cmp != 0) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ *out = data_blob_dup_talloc(mem_ctx, magic_fail);
+ if (out->data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ status = auth_system_user_info_dc(state,
+ lpcfg_netbios_name(gensec_security->settings->lp_ctx),
+ &state->user_info_dc);
+ if (!NT_STATUS_IS_OK(status)) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ *out = data_blob_dup_talloc(mem_ctx, magic_fail);
+ if (out->data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return status;
+ }
+
+ *out = data_blob_dup_talloc(mem_ctx, magic_ok);
+ if (out->data == NULL) {
+ state->step = GENSEC_NCALRPC_ERROR;
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ state->step = GENSEC_NCALRPC_DONE;
+ return NT_STATUS_OK;
+ }
+
+ state->step = GENSEC_NCALRPC_ERROR;
+ return NT_STATUS_INTERNAL_ERROR;
+}
+
+static NTSTATUS gensec_ncalrpc_update_recv(struct tevent_req *req,
+ TALLOC_CTX *out_mem_ctx,
+ DATA_BLOB *out)
+{
+ struct gensec_ncalrpc_update_state *state =
+ tevent_req_data(req,
+ struct gensec_ncalrpc_update_state);
+ NTSTATUS status;
+
+ *out = data_blob_null;
+
+ if (tevent_req_is_nterror(req, &status)) {
+ tevent_req_received(req);
+ return status;
+ }
+
+ status = state->status;
+ talloc_steal(out_mem_ctx, state->out.data);
+ *out = state->out;
+ tevent_req_received(req);
+ return status;
+}
+
+static NTSTATUS gensec_ncalrpc_session_info(struct gensec_security *gensec_security,
+ TALLOC_CTX *mem_ctx,
+ struct auth_session_info **psession_info)
+{
+ struct gensec_ncalrpc_state *state =
+ talloc_get_type_abort(gensec_security->private_data,
+ struct gensec_ncalrpc_state);
+ struct auth4_context *auth_ctx = gensec_security->auth_context;
+ struct auth_session_info *session_info = NULL;
+ uint32_t session_info_flags = 0;
+ NTSTATUS status;
+
+ if (gensec_security->gensec_role != GENSEC_SERVER) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (state->step != GENSEC_NCALRPC_DONE) {
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (auth_ctx == NULL) {
+ DEBUG(0, ("Cannot generate a session_info without the auth_context\n"));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ if (auth_ctx->generate_session_info == NULL) {
+ DEBUG(0, ("Cannot generate a session_info without the generate_session_info hook\n"));
+ return NT_STATUS_INTERNAL_ERROR;
+ }
+
+ if (gensec_security->want_features & GENSEC_FEATURE_UNIX_TOKEN) {
+ session_info_flags |= AUTH_SESSION_INFO_UNIX_TOKEN;
+ }
+
+ session_info_flags |= AUTH_SESSION_INFO_SIMPLE_PRIVILEGES;
+
+ status = auth_ctx->generate_session_info(
+ auth_ctx,
+ mem_ctx,
+ state->user_info_dc,
+ state->user_info_dc->info->account_name,
+ session_info_flags,
+ &session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ *psession_info = session_info;
+ return NT_STATUS_OK;
+}
+
+/* We have no features */
+static bool gensec_ncalrpc_have_feature(struct gensec_security *gensec_security,
+ uint32_t feature)
+{
+ if (feature & GENSEC_FEATURE_DCE_STYLE) {
+ return true;
+ }
+
+ return false;
+}
+
+static const struct gensec_security_ops gensec_ncalrpc_security_ops = {
+ .name = "ncalrpc_as_system",
+ .auth_type = DCERPC_AUTH_TYPE_NCALRPC_AS_SYSTEM,
+ .client_start = gensec_ncalrpc_client_start,
+ .server_start = gensec_ncalrpc_server_start,
+ .update_send = gensec_ncalrpc_update_send,
+ .update_recv = gensec_ncalrpc_update_recv,
+ .session_info = gensec_ncalrpc_session_info,
+ .have_feature = gensec_ncalrpc_have_feature,
+ .enabled = true,
+ .priority = GENSEC_EXTERNAL,
+};
+
+_PUBLIC_ NTSTATUS gensec_ncalrpc_as_system_init(TALLOC_CTX *ctx)
+{
+ NTSTATUS status;
+
+ status = gensec_register(ctx, &gensec_ncalrpc_security_ops);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0, ("Failed to register '%s' gensec backend!\n",
+ gensec_ncalrpc_security_ops.name));
+ return status;
+ }
+
+ return status;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 19:43:46 +0000