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-rw-r--r--source3/smbd/globals.h22
-rw-r--r--source3/smbd/smb2_server.c9
-rw-r--r--source3/smbd/smb2_sesssetup.c190
3 files changed, 220 insertions, 1 deletions
diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h
index 93075ad901..5a7ad7d9e3 100644
--- a/source3/smbd/globals.h
+++ b/source3/smbd/globals.h
@@ -221,6 +221,7 @@ NTSTATUS smbd_smb2_request_done(struct smbd_smb2_request *req,
DATA_BLOB body, DATA_BLOB *dyn);
NTSTATUS smbd_smb2_request_process_negprot(struct smbd_smb2_request *req);
+NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req);
NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
struct smbd_smb2_request {
@@ -276,6 +277,16 @@ struct smbd_smb2_request {
} out;
};
+struct smbd_server_connection;
+
+struct smbd_smb2_session {
+ struct smbd_smb2_session *prev, *next;
+ struct smbd_server_connection *conn;
+ NTSTATUS status;
+ uint64_t vuid;
+ AUTH_NTLMSSP_STATE *auth_ntlmssp_state;
+};
+
struct smbd_server_connection {
struct fd_event *fde;
uint64_t num_requests;
@@ -286,6 +297,17 @@ struct smbd_server_connection {
struct tevent_queue *recv_queue;
struct tevent_queue *send_queue;
struct tstream_context *stream;
+ struct {
+ /* an id tree used to allocate vuids */
+ /* this holds info on session vuids that are already
+ * validated for this VC */
+ struct idr_context *idtree;
+
+ /* this is the limit of vuid values for this connection */
+ uint64_t limit;
+
+ struct smbd_smb2_session *list;
+ } sessions;
} smb2;
};
diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c
index 68c812b37f..6d8961eebb 100644
--- a/source3/smbd/smb2_server.c
+++ b/source3/smbd/smb2_server.c
@@ -55,6 +55,13 @@ static NTSTATUS smbd_initialize_smb2(struct smbd_server_connection *conn)
return NT_STATUS_NO_MEMORY;
}
+ conn->smb2.sessions.idtree = idr_init(conn);
+ if (conn->smb2.sessions.idtree == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ conn->smb2.sessions.limit = 0x0000FFFF;
+ conn->smb2.sessions.list = NULL;
+
ret = tstream_bsd_existing_socket(conn, smbd_server_fd(),
&conn->smb2.stream);
if (ret == -1) {
@@ -293,7 +300,7 @@ static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
return smbd_smb2_request_process_negprot(req);
case SMB2_OP_SESSSETUP:
- return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
+ return smbd_smb2_request_process_sesssetup(req);
case SMB2_OP_LOGOFF:
return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
diff --git a/source3/smbd/smb2_sesssetup.c b/source3/smbd/smb2_sesssetup.c
new file mode 100644
index 0000000000..6c4da393e1
--- /dev/null
+++ b/source3/smbd/smb2_sesssetup.c
@@ -0,0 +1,190 @@
+/*
+ Unix SMB/CIFS implementation.
+ Core SMB2 server
+
+ Copyright (C) Stefan Metzmacher 2009
+
+ 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 "smbd/globals.h"
+#include "../source4/libcli/smb2/smb2_constants.h"
+
+static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *req,
+ uint64_t in_session_id,
+ DATA_BLOB in_security_buffer,
+ DATA_BLOB *out_security_buffer,
+ uint64_t *out_session_id);
+
+NTSTATUS smbd_smb2_request_process_sesssetup(struct smbd_smb2_request *req)
+{
+ const uint8_t *inhdr;
+ const uint8_t *inbody;
+ int i = req->current_idx;
+ uint8_t *outhdr;
+ DATA_BLOB outbody;
+ DATA_BLOB outdyn;
+ size_t expected_body_size = 0x19;
+ size_t body_size;
+ uint64_t in_session_id;
+ uint16_t in_security_offset;
+ uint16_t in_security_length;
+ DATA_BLOB in_security_buffer;
+ uint64_t out_session_id;
+ uint16_t out_security_offset;
+ DATA_BLOB out_security_buffer;
+ NTSTATUS status;
+
+ inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
+
+ if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+
+ body_size = SVAL(inbody, 0x00);
+ if (body_size != expected_body_size) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ in_security_offset = SVAL(inbody, 0x0C);
+ in_security_length = SVAL(inbody, 0x0E);
+
+ if (in_security_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ if (in_security_length > req->in.vector[i+2].iov_len) {
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ in_session_id = SVAL(inhdr, SMB2_HDR_SESSION_ID);
+ in_security_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
+ in_security_buffer.length = in_security_length;
+
+ status = smbd_smb2_session_setup(req,
+ in_session_id,
+ in_security_buffer,
+ &out_security_buffer,
+ &out_session_id);
+ if (!NT_STATUS_IS_OK(status) &&
+ !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ status = nt_status_squash(status);
+ return smbd_smb2_request_error(req, status);
+ }
+
+ out_security_offset = SMB2_HDR_BODY + 0x08;
+
+ outhdr = (uint8_t *)req->out.vector[i].iov_base;
+
+ outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
+ if (outbody.data == NULL) {
+ return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ }
+
+ SBVAL(outhdr, SMB2_HDR_SESSION_ID, out_session_id);
+
+ SSVAL(outbody.data, 0x00, 0x08 + 1); /* struct size */
+ SSVAL(outbody.data, 0x02, 0); /* session flags */
+ SSVAL(outbody.data, 0x04,
+ out_security_offset); /* security buffer offset */
+ SSVAL(outbody.data, 0x06,
+ out_security_buffer.length); /* security buffer length */
+
+ outdyn = out_security_buffer;
+
+ return smbd_smb2_request_done_ex(req, status, outbody, &outdyn);
+}
+
+static int smbd_smb2_session_destructor(struct smbd_smb2_session *session)
+{
+ if (session->conn == NULL) {
+ return 0;
+ }
+
+ idr_remove(session->conn->smb2.sessions.idtree, session->vuid);
+ DLIST_REMOVE(session->conn->smb2.sessions.list, session);
+
+ return 0;
+}
+
+static NTSTATUS smbd_smb2_session_setup(struct smbd_smb2_request *req,
+ uint64_t in_session_id,
+ DATA_BLOB in_security_buffer,
+ DATA_BLOB *out_security_buffer,
+ uint64_t *out_session_id)
+{
+ struct smbd_smb2_session *session;
+ NTSTATUS status;
+
+ if (in_session_id == 0) {
+ int id;
+
+ /* create a new session */
+ session = talloc_zero(req->conn, struct smbd_smb2_session);
+ if (session == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ session->status = NT_STATUS_MORE_PROCESSING_REQUIRED;
+ id = idr_get_new_random(req->conn->smb2.sessions.idtree,
+ session,
+ req->conn->smb2.sessions.limit);
+ if (id == -1) {
+ return NT_STATUS_INSUFFICIENT_RESOURCES;
+ }
+ session->vuid = id;
+ DLIST_ADD_END(req->conn->smb2.sessions.list, session,
+ struct smbd_smb2_session *);
+ session->conn = req->conn;
+ talloc_set_destructor(session, smbd_smb2_session_destructor);
+ } else {
+ void *p;
+
+ /* lookup an existing session */
+ p = idr_find(req->conn->smb2.sessions.idtree, in_session_id);
+ if (p == NULL) {
+ return NT_STATUS_USER_SESSION_DELETED;
+ }
+ session = talloc_get_type_abort(p, struct smbd_smb2_session);
+ }
+
+ if (NT_STATUS_IS_OK(session->status)) {
+ return NT_STATUS_REQUEST_NOT_ACCEPTED;
+ }
+
+ if (session->auth_ntlmssp_state == NULL) {
+ status = auth_ntlmssp_start(&session->auth_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ }
+
+ status = auth_ntlmssp_update(session->auth_ntlmssp_state,
+ in_security_buffer,
+ out_security_buffer);
+ if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ /* nothing to do */
+ } else if (NT_STATUS_IS_OK(status)) {
+ /* TODO: setup session key for signing */
+ session->status = NT_STATUS_OK;
+ } else {
+ return status;
+ }
+
+ *out_session_id = session->vuid;
+ return status;
+}
+
generated by cgit (git 2.34.1) at 2024-12-02 00:23:45 +0000