s3:libsmb: add smb2cli_negprot*()

Based on the initial patch from Volker Lendecke <vl@samba.org>.

metze

2 files changed, 192 insertions, 0 deletions

diff --git a/source3/libsmb/smb2cli.h b/source3/libsmb/smb2cli.h
new file mode 100644
index 0000000000..f4fd97c801
--- /dev/null
+++ b/source3/libsmb/smb2cli.h
@@ -0,0 +1,29 @@
+/*
+   Unix SMB/CIFS implementation.
+   smb2 client routines
+   Copyright (C) Volker Lendecke 2011
+
+   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/>.
+*/
+
+#ifndef __SMB2CLI_H__
+#define __SMB2CLI_H__
+
+struct tevent_req *smb2cli_negprot_send(TALLOC_CTX *mem_ctx,
+					 struct tevent_context *ev,
+					 struct cli_state *cli);
+NTSTATUS smb2cli_negprot_recv(struct tevent_req *req);
+NTSTATUS smb2cli_negprot(struct cli_state *cli);
+
+#endif /* __SMB2CLI_H__ */
diff --git a/source3/libsmb/smb2cli_negprot.c b/source3/libsmb/smb2cli_negprot.c
new file mode 100644
index 0000000000..305632283f
--- /dev/null
+++ b/source3/libsmb/smb2cli_negprot.c
@@ -0,0 +1,163 @@
+/*
+   Unix SMB/CIFS implementation.
+   smb2 lib
+   Copyright (C) Volker Lendecke 2011
+
+   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 "client.h"
+#include "async_smb.h"
+#include "smb2cli_base.h"
+#include "smb2cli.h"
+#include "libsmb/proto.h"
+#include "librpc/ndr/libndr.h"
+#include "lib/util/tevent_ntstatus.h"
+
+struct smb2cli_negprot_state {
+	struct cli_state *cli;
+	uint8_t fixed[36];
+	uint8_t dyn[4];
+};
+
+static void smb2cli_negprot_done(struct tevent_req *subreq);
+
+struct tevent_req *smb2cli_negprot_send(TALLOC_CTX *mem_ctx,
+					struct tevent_context *ev,
+					struct cli_state *cli)
+{
+	struct tevent_req *req, *subreq;
+	struct smb2cli_negprot_state *state;
+	uint8_t *buf;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct smb2cli_negprot_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->cli = cli;
+
+	buf = state->fixed;
+	SSVAL(buf, 0, 36);
+	SSVAL(buf, 2, 2);	/* DialectCount */
+	if (client_is_signing_mandatory(cli)) {
+		SSVAL(buf, 4, SMB2_NEGOTIATE_SIGNING_REQUIRED);
+	} else {
+		SSVAL(buf, 4, SMB2_NEGOTIATE_SIGNING_ENABLED);
+	}
+	SSVAL(buf, 6, 0);	/* Reserved */
+	SSVAL(buf, 8, 0); 	/* Capabilities */
+	memset(buf+12, 0, 16);	/* ClientGuid */
+	SBVAL(buf, 28, 0);	/* ClientStartTime */
+
+	buf = state->dyn;
+	SSVAL(buf, 0, 0x202);	/* SMB2.002 */
+	SSVAL(buf, 2, 0x210);	/* SMB2.1 */
+
+	subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_NEGPROT, 0,
+				  state->fixed, sizeof(state->fixed),
+				  state->dyn, sizeof(state->dyn));
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, smb2cli_negprot_done, req);
+	return req;
+}
+
+static void smb2cli_negprot_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+		tevent_req_callback_data(subreq,
+		struct tevent_req);
+	struct smb2cli_negprot_state *state =
+		tevent_req_data(req,
+		struct smb2cli_negprot_state);
+	struct cli_state *cli = state->cli;
+	size_t security_offset, security_length;
+	DATA_BLOB blob;
+	NTSTATUS status;
+	struct iovec *iov;
+	uint8_t *body;
+
+	status = smb2cli_req_recv(subreq, talloc_tos(), &iov, 65);
+	if (!NT_STATUS_IS_OK(status)) {
+		TALLOC_FREE(subreq);
+		tevent_req_nterror(req, status);
+		return;
+	}
+	body = (uint8_t *)iov[1].iov_base;
+
+	cli->smb2.security_mode		= SVAL(body, 2);
+	cli->smb2.dialect_revision	= SVAL(body, 4);
+
+	blob = data_blob_const(body + 8, 16);
+	GUID_from_data_blob(&blob, &cli->smb2.server_guid);
+
+	cli->smb2.server_capabilities	= IVAL(body, 24);
+	cli->smb2.max_transact_size	= IVAL(body, 28);
+	cli->smb2.max_read_size		= IVAL(body, 32);
+	cli->smb2.max_write_size	= IVAL(body, 36);
+	cli->smb2.system_time		= interpret_long_date((char *)body + 40);
+	cli->smb2.server_start_time	= interpret_long_date((char *)body + 48);
+
+	security_offset		= SVAL(body, 56);
+	security_length		= SVAL(body, 58);
+
+	if ((security_offset != SMB2_HDR_BODY + iov[1].iov_len) ||
+	    (security_length > iov[2].iov_len)) {
+		tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
+		return;
+	}
+	cli->secblob = data_blob(iov[1].iov_base, security_length);
+
+	tevent_req_done(req);
+}
+
+NTSTATUS smb2cli_negprot_recv(struct tevent_req *req)
+{
+	return tevent_req_simple_recv_ntstatus(req);
+}
+
+NTSTATUS smb2cli_negprot(struct cli_state *cli)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct event_context *ev;
+	struct tevent_req *req;
+	NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+	if (cli_has_async_calls(cli)) {
+		/*
+		 * Can't use sync call while an async call is in flight
+		 */
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto fail;
+	}
+	ev = event_context_init(frame);
+	if (ev == NULL) {
+		goto fail;
+	}
+	req = smb2cli_negprot_send(frame, ev, cli);
+	if (req == NULL) {
+		goto fail;
+	}
+	if (!tevent_req_poll_ntstatus(req, ev, &status)) {
+		goto fail;
+	}
+	status = smb2cli_negprot_recv(req);
+ fail:
+	TALLOC_FREE(frame);
+	return status;
+}
+