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-rw-r--r--source4/libcli/smb_composite/connect.c528
1 files changed, 528 insertions, 0 deletions
diff --git a/source4/libcli/smb_composite/connect.c b/source4/libcli/smb_composite/connect.c
new file mode 100644
index 0000000..ad50ae0
--- /dev/null
+++ b/source4/libcli/smb_composite/connect.c
@@ -0,0 +1,528 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Copyright (C) Andrew Tridgell 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/>.
+*/
+/*
+ a composite API for making a full SMB connection
+*/
+
+#include "includes.h"
+#include "libcli/raw/libcliraw.h"
+#include "libcli/raw/raw_proto.h"
+#include "libcli/composite/composite.h"
+#include "libcli/smb_composite/smb_composite.h"
+#include "lib/events/events.h"
+#include "libcli/resolve/resolve.h"
+#include "auth/credentials/credentials.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "param/param.h"
+#include "lib/util/util_net.h"
+#include "libcli/smb/smbXcli_base.h"
+
+/* the stages of this call */
+enum connect_stage {CONNECT_SOCKET,
+ CONNECT_NEGPROT,
+ CONNECT_SESSION_SETUP,
+ CONNECT_SESSION_SETUP_ANON,
+ CONNECT_TCON,
+ CONNECT_DONE
+};
+
+struct connect_state {
+ enum connect_stage stage;
+ struct smbcli_socket *sock;
+ struct smbcli_transport *transport;
+ struct smbcli_session *session;
+ struct smb_composite_connect *io;
+ union smb_tcon *io_tcon;
+ struct smb_composite_sesssetup *io_setup;
+ struct smbcli_request *req;
+ struct composite_context *creq;
+ struct tevent_req *subreq;
+ struct nbt_name calling, called;
+};
+
+
+static void request_handler(struct smbcli_request *);
+static void composite_handler(struct composite_context *);
+static void subreq_handler(struct tevent_req *subreq);
+
+/*
+ a tree connect request has completed
+*/
+static NTSTATUS connect_tcon(struct composite_context *c,
+ struct smb_composite_connect *io)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+ NTSTATUS status;
+
+ status = smb_raw_tcon_recv(state->req, c, state->io_tcon);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ if (state->io_tcon->tconx.out.options & SMB_EXTENDED_SIGNATURES) {
+ smb1cli_session_protect_session_key(io->out.tree->session->smbXcli);
+ }
+
+ io->out.tree->tid = state->io_tcon->tconx.out.tid;
+ if (state->io_tcon->tconx.out.dev_type) {
+ io->out.tree->device = talloc_strdup(io->out.tree,
+ state->io_tcon->tconx.out.dev_type);
+ }
+ if (state->io_tcon->tconx.out.fs_type) {
+ io->out.tree->fs_type = talloc_strdup(io->out.tree,
+ state->io_tcon->tconx.out.fs_type);
+ }
+
+ state->stage = CONNECT_DONE;
+
+ return NT_STATUS_OK;
+}
+
+
+/*
+ a session setup request with anonymous fallback has completed
+*/
+static NTSTATUS connect_session_setup_anon(struct composite_context *c,
+ struct smb_composite_connect *io)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+ NTSTATUS status;
+
+ status = smb_composite_sesssetup_recv(state->creq);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ io->out.anonymous_fallback_done = true;
+
+ state->session->vuid = state->io_setup->out.vuid;
+
+ /* setup for a tconx */
+ state->io_tcon = talloc(c, union smb_tcon);
+ NT_STATUS_HAVE_NO_MEMORY(state->io_tcon);
+
+ /* connect to a share using a tree connect */
+ state->io_tcon->generic.level = RAW_TCON_TCONX;
+ state->io_tcon->tconx.in.flags = TCONX_FLAG_EXTENDED_RESPONSE;
+ state->io_tcon->tconx.in.password = data_blob(NULL, 0);
+
+ state->io_tcon->tconx.in.path = talloc_asprintf(state->io_tcon,
+ "\\\\%s\\%s",
+ io->in.called_name,
+ io->in.service);
+ NT_STATUS_HAVE_NO_MEMORY(state->io_tcon->tconx.in.path);
+ if (!io->in.service_type) {
+ state->io_tcon->tconx.in.device = "?????";
+ } else {
+ state->io_tcon->tconx.in.device = io->in.service_type;
+ }
+
+ state->req = smb_raw_tcon_send(io->out.tree, state->io_tcon);
+ NT_STATUS_HAVE_NO_MEMORY(state->req);
+ if (state->req->state == SMBCLI_REQUEST_ERROR) {
+ return state->req->status;
+ }
+
+ state->req->async.fn = request_handler;
+ state->req->async.private_data = c;
+ state->stage = CONNECT_TCON;
+
+ return NT_STATUS_OK;
+}
+
+/*
+ a session setup request has completed
+*/
+static NTSTATUS connect_session_setup(struct composite_context *c,
+ struct smb_composite_connect *io)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+ NTSTATUS status;
+
+ status = smb_composite_sesssetup_recv(state->creq);
+
+ if (!NT_STATUS_IS_OK(status) &&
+ !cli_credentials_is_anonymous(state->io->in.credentials) &&
+ io->in.fallback_to_anonymous) {
+
+ state->io_setup->in.credentials = cli_credentials_init(state);
+ NT_STATUS_HAVE_NO_MEMORY(state->io_setup->in.credentials);
+ cli_credentials_set_workstation(state->io_setup->in.credentials,
+ cli_credentials_get_workstation(state->io->in.credentials),
+ CRED_SPECIFIED);
+ cli_credentials_set_anonymous(state->io_setup->in.credentials);
+
+ /* If the preceding attempt was with extended security, we
+ * have been given a uid in the NTLMSSP_CHALLENGE reply. This
+ * would lead to an invalid uid in the anonymous fallback */
+ state->session->vuid = 0;
+ talloc_free(state->session->gensec);
+ state->session->gensec = NULL;
+
+ state->creq = smb_composite_sesssetup_send(state->session,
+ state->io_setup);
+ NT_STATUS_HAVE_NO_MEMORY(state->creq);
+ if (state->creq->state == COMPOSITE_STATE_ERROR) {
+ return state->creq->status;
+ }
+ state->creq->async.fn = composite_handler;
+ state->creq->async.private_data = c;
+ state->stage = CONNECT_SESSION_SETUP_ANON;
+
+ return NT_STATUS_OK;
+ }
+
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ state->session->vuid = state->io_setup->out.vuid;
+
+ /* If we don't have a remote share name then this indicates that
+ * we don't want to do a tree connect */
+ if (!io->in.service) {
+ state->stage = CONNECT_DONE;
+ return NT_STATUS_OK;
+ }
+
+ state->io_tcon = talloc(c, union smb_tcon);
+ NT_STATUS_HAVE_NO_MEMORY(state->io_tcon);
+
+ /* connect to a share using a tree connect */
+ state->io_tcon->generic.level = RAW_TCON_TCONX;
+ state->io_tcon->tconx.in.flags = TCONX_FLAG_EXTENDED_RESPONSE;
+ state->io_tcon->tconx.in.flags |= TCONX_FLAG_EXTENDED_SIGNATURES;
+ state->io_tcon->tconx.in.password = data_blob(NULL, 0);
+
+ state->io_tcon->tconx.in.path = talloc_asprintf(state->io_tcon,
+ "\\\\%s\\%s",
+ io->in.called_name,
+ io->in.service);
+ NT_STATUS_HAVE_NO_MEMORY(state->io_tcon->tconx.in.path);
+ if (!io->in.service_type) {
+ state->io_tcon->tconx.in.device = "?????";
+ } else {
+ state->io_tcon->tconx.in.device = io->in.service_type;
+ }
+
+ state->req = smb_raw_tcon_send(io->out.tree, state->io_tcon);
+ NT_STATUS_HAVE_NO_MEMORY(state->req);
+ if (state->req->state == SMBCLI_REQUEST_ERROR) {
+ return state->req->status;
+ }
+
+ state->req->async.fn = request_handler;
+ state->req->async.private_data = c;
+ state->stage = CONNECT_TCON;
+
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS connect_send_session(struct composite_context *c,
+ struct smb_composite_connect *io)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+
+ /* next step is a session setup */
+ state->session = smbcli_session_init(state->transport, state, true, io->in.session_options);
+ NT_STATUS_HAVE_NO_MEMORY(state->session);
+
+ /* setup for a tconx (or at least have the structure ready to
+ * return, if we won't go that far) */
+ io->out.tree = smbcli_tree_init(state->session, state, true);
+ NT_STATUS_HAVE_NO_MEMORY(io->out.tree);
+
+ /* If we don't have any credentials then this indicates that
+ * we don't want to do a session setup */
+ if (!io->in.credentials) {
+ state->stage = CONNECT_DONE;
+ return NT_STATUS_OK;
+ }
+
+ state->io_setup = talloc(c, struct smb_composite_sesssetup);
+ NT_STATUS_HAVE_NO_MEMORY(state->io_setup);
+
+ /* prepare a session setup to establish a security context */
+ state->io_setup->in.sesskey = state->transport->negotiate.sesskey;
+ state->io_setup->in.capabilities = state->transport->negotiate.capabilities;
+ state->io_setup->in.credentials = io->in.credentials;
+ state->io_setup->in.workgroup = io->in.workgroup;
+ state->io_setup->in.gensec_settings = io->in.gensec_settings;
+
+ state->creq = smb_composite_sesssetup_send(state->session, state->io_setup);
+ NT_STATUS_HAVE_NO_MEMORY(state->creq);
+ if (state->creq->state == COMPOSITE_STATE_ERROR) {
+ return state->creq->status;
+ }
+
+ state->creq->async.fn = composite_handler;
+ state->creq->async.private_data = c;
+
+ state->stage = CONNECT_SESSION_SETUP;
+
+ return NT_STATUS_OK;
+}
+
+/*
+ a negprot request has completed
+*/
+static NTSTATUS connect_negprot(struct composite_context *c,
+ struct smb_composite_connect *io)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+ NTSTATUS status;
+
+ status = smb_raw_negotiate_recv(state->subreq);
+ TALLOC_FREE(state->subreq);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ return connect_send_session(c, io);
+}
+
+/*
+ setup a negprot send
+*/
+static NTSTATUS connect_send_negprot(struct composite_context *c,
+ struct smb_composite_connect *io)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+
+ /* the socket is up - we can initialise the smbcli transport layer */
+ state->transport = smbcli_transport_init(state->sock, state, true,
+ &io->in.options);
+ NT_STATUS_HAVE_NO_MEMORY(state->transport);
+
+ state->subreq = smb_raw_negotiate_send(state,
+ state->transport->ev,
+ state->transport,
+ state->transport->options.min_protocol,
+ state->transport->options.max_protocol);
+ NT_STATUS_HAVE_NO_MEMORY(state->subreq);
+ tevent_req_set_callback(state->subreq, subreq_handler, c);
+ state->stage = CONNECT_NEGPROT;
+
+ return NT_STATUS_OK;
+}
+
+/*
+ a socket connection operation has completed
+*/
+static NTSTATUS connect_socket(struct composite_context *c,
+ struct smb_composite_connect *io)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+ NTSTATUS status;
+
+ status = smbcli_sock_connect_recv(state->creq, state, &state->sock);
+ NT_STATUS_NOT_OK_RETURN(status);
+
+ if (is_ipaddress(state->sock->hostname) &&
+ (state->io->in.called_name != NULL)) {
+ /* If connecting to an IP address, we might want the real name
+ * of the host for later kerberos. The called name is a better
+ * approximation */
+ state->sock->hostname =
+ talloc_strdup(state->sock, io->in.called_name);
+ NT_STATUS_HAVE_NO_MEMORY(state->sock->hostname);
+ }
+
+ /* next step is a negprot */
+ return connect_send_negprot(c, io);
+}
+
+
+/*
+ handle and dispatch state transitions
+*/
+static void state_handler(struct composite_context *c)
+{
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+
+ switch (state->stage) {
+ case CONNECT_SOCKET:
+ c->status = connect_socket(c, state->io);
+ break;
+ case CONNECT_NEGPROT:
+ c->status = connect_negprot(c, state->io);
+ break;
+ case CONNECT_SESSION_SETUP:
+ c->status = connect_session_setup(c, state->io);
+ break;
+ case CONNECT_SESSION_SETUP_ANON:
+ c->status = connect_session_setup_anon(c, state->io);
+ break;
+ case CONNECT_TCON:
+ c->status = connect_tcon(c, state->io);
+ break;
+ case CONNECT_DONE:
+ break;
+ }
+
+ if (state->stage == CONNECT_DONE) {
+ /* all done! */
+ composite_done(c);
+ } else {
+ composite_is_ok(c);
+ }
+}
+
+
+/*
+ handler for completion of a smbcli_request sub-request
+*/
+static void request_handler(struct smbcli_request *req)
+{
+ struct composite_context *c = talloc_get_type(req->async.private_data,
+ struct composite_context);
+ state_handler(c);
+}
+
+/*
+ handler for completion of a smbcli_composite sub-request
+*/
+static void composite_handler(struct composite_context *creq)
+{
+ struct composite_context *c = talloc_get_type(creq->async.private_data,
+ struct composite_context);
+ state_handler(c);
+}
+
+/*
+ handler for completion of a tevent_req sub-request
+*/
+static void subreq_handler(struct tevent_req *subreq)
+{
+ struct composite_context *c =
+ tevent_req_callback_data(subreq,
+ struct composite_context);
+ state_handler(c);
+}
+
+/*
+ a function to establish a smbcli_tree from scratch
+*/
+struct composite_context *smb_composite_connect_send(struct smb_composite_connect *io,
+ TALLOC_CTX *mem_ctx,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *event_ctx)
+{
+ struct composite_context *c;
+ struct connect_state *state;
+
+ c = talloc_zero(mem_ctx, struct composite_context);
+ if (c == NULL) {
+ goto nomem;
+ }
+
+ state = talloc_zero(c, struct connect_state);
+ if (state == NULL) {
+ goto nomem;
+ }
+
+ c->event_ctx = event_ctx;
+ if (c->event_ctx == NULL) {
+ composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
+ return c;
+ }
+
+ if (io->in.gensec_settings == NULL) {
+ composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
+ return c;
+ }
+ state->io = io;
+
+ c->state = COMPOSITE_STATE_IN_PROGRESS;
+ c->private_data = state;
+
+ make_nbt_name_client(&state->calling,
+ cli_credentials_get_workstation(io->in.credentials));
+
+ nbt_choose_called_name(state, &state->called,
+ io->in.called_name, NBT_NAME_SERVER);
+
+ if (io->in.existing_conn != NULL) {
+ NTSTATUS status;
+
+ status = smbcli_transport_raw_init(state,
+ c->event_ctx,
+ &io->in.existing_conn,
+ &io->in.options,
+ &state->transport);
+ if (!NT_STATUS_IS_OK(status)) {
+ composite_error(c, status);
+ return c;
+ }
+
+ status = connect_send_session(c, io);
+ if (!NT_STATUS_IS_OK(status)) {
+ composite_error(c, status);
+ return c;
+ }
+
+ return c;
+ }
+
+ state->creq = smbcli_sock_connect_send(state,
+ NULL,
+ io->in.dest_ports,
+ io->in.dest_host,
+ resolve_ctx, c->event_ctx,
+ io->in.socket_options,
+ &state->calling,
+ &state->called);
+ if (state->creq == NULL) {
+ composite_error(c, NT_STATUS_NO_MEMORY);
+ return c;
+ }
+
+ state->stage = CONNECT_SOCKET;
+ state->creq->async.private_data = c;
+ state->creq->async.fn = composite_handler;
+
+ return c;
+nomem:
+ TALLOC_FREE(c);
+ return NULL;
+}
+
+/*
+ recv half of async composite connect code
+*/
+NTSTATUS smb_composite_connect_recv(struct composite_context *c, TALLOC_CTX *mem_ctx)
+{
+ NTSTATUS status;
+
+ status = composite_wait(c);
+
+ if (NT_STATUS_IS_OK(status)) {
+ struct connect_state *state = talloc_get_type(c->private_data, struct connect_state);
+ talloc_steal(mem_ctx, state->io->out.tree);
+ }
+
+ talloc_free(c);
+ return status;
+}
+
+/*
+ sync version of smb_composite_connect
+*/
+NTSTATUS smb_composite_connect(struct smb_composite_connect *io, TALLOC_CTX *mem_ctx,
+ struct resolve_context *resolve_ctx,
+ struct tevent_context *ev)
+{
+ struct composite_context *c = smb_composite_connect_send(io, mem_ctx, resolve_ctx, ev);
+ if (c == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ return smb_composite_connect_recv(c, mem_ctx);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 09:27:37 +0000