#include "../lib/util/tevent_ntstatus.h"
#include "../lib/util/tevent_unix.h"
#include "lib/util/util_net.h"
+#include "lib/util/dlinklist.h"
#include "../libcli/smb/smb_common.h"
#include "../libcli/smb/smb_seal.h"
#include "../libcli/smb/smb_signing.h"
#include "smbXcli_base.h"
#include "librpc/ndr/libndr.h"
+struct smbXcli_conn;
+struct smbXcli_req;
+struct smbXcli_session;
+
struct smbXcli_conn {
- int fd;
+ int read_fd;
+ int write_fd;
struct sockaddr_storage local_ss;
struct sockaddr_storage remote_ss;
const char *remote_name;
struct smb_signing_state *signing;
struct smb_trans_enc_state *trans_enc;
+
+ struct tevent_req *read_braw_req;
} smb1;
struct {
struct {
+ uint32_t capabilities;
uint16_t security_mode;
struct GUID guid;
} client;
} server;
uint64_t mid;
+ uint16_t cur_credits;
+ uint16_t max_credits;
+ } smb2;
+
+ struct smbXcli_session *sessions;
+};
+
+struct smbXcli_session {
+ struct smbXcli_session *prev, *next;
+ struct smbXcli_conn *conn;
+
+ struct {
+ uint64_t session_id;
+ uint16_t session_flags;
+ DATA_BLOB application_key;
+ DATA_BLOB signing_key;
+ bool should_sign;
+ bool should_encrypt;
+ DATA_BLOB encryption_key;
+ DATA_BLOB decryption_key;
+ uint64_t channel_nonce;
+ uint64_t channel_next;
+ DATA_BLOB channel_signing_key;
} smb2;
};
struct smbXcli_req_state {
struct tevent_context *ev;
struct smbXcli_conn *conn;
+ struct smbXcli_session *session; /* maybe NULL */
uint8_t length_hdr[4];
uint16_t *vwv;
uint8_t bytecount_buf[2];
-#define MAX_SMB_IOV 5
+#define MAX_SMB_IOV 10
/* length_hdr, hdr, words, byte_count, buffers */
struct iovec iov[1 + 3 + MAX_SMB_IOV];
int iov_count;
+ bool one_way_seqnum;
uint32_t seqnum;
struct tevent_req **chained_requests;
const uint8_t *dyn;
uint32_t dyn_len;
- uint8_t hdr[64];
+ uint8_t hdr[SMB2_HDR_BODY];
uint8_t pad[7]; /* padding space for compounding */
- /* always an array of 3 talloc elements */
+ /*
+ * always an array of 3 talloc elements
+ * (without a SMB2_TRANSFORM header!)
+ *
+ * HDR, BODY, DYN
+ */
struct iovec *recv_iov;
+
+ uint16_t credit_charge;
+
+ bool should_sign;
+
+ bool signing_skipped;
+ bool notify_async;
+ bool got_async;
} smb2;
};
*/
smbXcli_conn_disconnect(conn, NT_STATUS_OK);
+ while (conn->sessions) {
+ conn->sessions->conn = NULL;
+ DLIST_REMOVE(conn->sessions, conn->sessions);
+ }
+
if (conn->smb1.trans_enc) {
- common_free_encryption_state(&conn->smb1.trans_enc);
+ TALLOC_FREE(conn->smb1.trans_enc);
}
return 0;
const char *remote_name,
enum smb_signing_setting signing_state,
uint32_t smb1_capabilities,
- struct GUID *client_guid)
+ struct GUID *client_guid,
+ uint32_t smb2_capabilities)
{
struct smbXcli_conn *conn = NULL;
void *ss = NULL;
return NULL;
}
+ conn->read_fd = fd;
+ conn->write_fd = dup(fd);
+ if (conn->write_fd == -1) {
+ goto error;
+ }
+
conn->remote_name = talloc_strdup(conn, remote_name);
if (conn->remote_name == NULL) {
goto error;
}
- conn->fd = fd;
ss = (void *)&conn->local_ss;
sa = (struct sockaddr *)ss;
if (client_guid) {
conn->smb2.client.guid = *client_guid;
}
+ conn->smb2.client.capabilities = smb2_capabilities;
+
+ conn->smb2.cur_credits = 1;
+ conn->smb2.max_credits = 0;
talloc_set_destructor(conn, smbXcli_conn_destructor);
return conn;
error:
+ if (conn->write_fd != -1) {
+ close(conn->write_fd);
+ }
TALLOC_FREE(conn);
return NULL;
}
return false;
}
- if (conn->fd == -1) {
+ if (conn->read_fd == -1) {
return false;
}
void smbXcli_conn_set_sockopt(struct smbXcli_conn *conn, const char *options)
{
- set_socket_options(conn->fd, options);
+ set_socket_options(conn->read_fd, options);
}
const struct sockaddr_storage *smbXcli_conn_local_sockaddr(struct smbXcli_conn *conn)
return &conn->smb1.server.guid;
}
+struct smbXcli_conn_samba_suicide_state {
+ struct smbXcli_conn *conn;
+ struct iovec iov;
+ uint8_t buf[9];
+};
+
+static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq);
+
+struct tevent_req *smbXcli_conn_samba_suicide_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct smbXcli_conn *conn,
+ uint8_t exitcode)
+{
+ struct tevent_req *req, *subreq;
+ struct smbXcli_conn_samba_suicide_state *state;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct smbXcli_conn_samba_suicide_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->conn = conn;
+ SIVAL(state->buf, 4, 0x74697865);
+ SCVAL(state->buf, 8, exitcode);
+ _smb_setlen_nbt(state->buf, sizeof(state->buf)-4);
+
+ state->iov.iov_base = state->buf;
+ state->iov.iov_len = sizeof(state->buf);
+
+ subreq = writev_send(state, ev, conn->outgoing, conn->write_fd,
+ false, &state->iov, 1);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, smbXcli_conn_samba_suicide_done, req);
+ return req;
+}
+
+static void smbXcli_conn_samba_suicide_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct smbXcli_conn_samba_suicide_state *state = tevent_req_data(
+ req, struct smbXcli_conn_samba_suicide_state);
+ ssize_t nwritten;
+ int err;
+
+ nwritten = writev_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (nwritten == -1) {
+ NTSTATUS status = map_nt_error_from_unix_common(err);
+ smbXcli_conn_disconnect(state->conn, status);
+ return;
+ }
+ tevent_req_done(req);
+}
+
+NTSTATUS smbXcli_conn_samba_suicide_recv(struct tevent_req *req)
+{
+ return tevent_req_simple_recv_ntstatus(req);
+}
+
+NTSTATUS smbXcli_conn_samba_suicide(struct smbXcli_conn *conn,
+ uint8_t exitcode)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct tevent_context *ev;
+ struct tevent_req *req;
+ NTSTATUS status = NT_STATUS_NO_MEMORY;
+ bool ok;
+
+ if (smbXcli_conn_has_async_calls(conn)) {
+ /*
+ * Can't use sync call while an async call is in flight
+ */
+ status = NT_STATUS_INVALID_PARAMETER_MIX;
+ goto fail;
+ }
+ ev = tevent_context_init(frame);
+ if (ev == NULL) {
+ goto fail;
+ }
+ req = smbXcli_conn_samba_suicide_send(frame, ev, conn, exitcode);
+ if (req == NULL) {
+ goto fail;
+ }
+ ok = tevent_req_poll(req, ev);
+ if (!ok) {
+ status = map_nt_error_from_unix_common(errno);
+ goto fail;
+ }
+ status = smbXcli_conn_samba_suicide_recv(req);
+ fail:
+ TALLOC_FREE(frame);
+ return status;
+}
+
uint32_t smb1cli_conn_capabilities(struct smbXcli_conn *conn)
{
return conn->smb1.capabilities;
return conn->smb1.server.security_mode;
}
+bool smb1cli_conn_server_readbraw(struct smbXcli_conn *conn)
+{
+ return conn->smb1.server.readbraw;
+}
+
+bool smb1cli_conn_server_writebraw(struct smbXcli_conn *conn)
+{
+ return conn->smb1.server.writebraw;
+}
+
+bool smb1cli_conn_server_lockread(struct smbXcli_conn *conn)
+{
+ return conn->smb1.server.lockread;
+}
+
+bool smb1cli_conn_server_writeunlock(struct smbXcli_conn *conn)
+{
+ return conn->smb1.server.writeunlock;
+}
+
int smb1cli_conn_server_time_zone(struct smbXcli_conn *conn)
{
return conn->smb1.server.time_zone;
{
/* Replace the old state, if any. */
if (conn->smb1.trans_enc) {
- common_free_encryption_state(&conn->smb1.trans_enc);
+ TALLOC_FREE(conn->smb1.trans_enc);
}
conn->smb1.trans_enc = es;
}
return 0;
}
+static bool smb1cli_req_cancel(struct tevent_req *req);
+static bool smb2cli_req_cancel(struct tevent_req *req);
+
+static bool smbXcli_req_cancel(struct tevent_req *req)
+{
+ struct smbXcli_req_state *state =
+ tevent_req_data(req,
+ struct smbXcli_req_state);
+
+ if (!smbXcli_conn_is_connected(state->conn)) {
+ return false;
+ }
+
+ if (state->conn->protocol == PROTOCOL_NONE) {
+ return false;
+ }
+
+ if (state->conn->protocol >= PROTOCOL_SMB2_02) {
+ return smb2cli_req_cancel(req);
+ }
+
+ return smb1cli_req_cancel(req);
+}
+
static bool smbXcli_conn_receive_next(struct smbXcli_conn *conn);
bool smbXcli_req_set_pending(struct tevent_req *req)
pending[num_pending] = req;
conn->pending = pending;
talloc_set_destructor(req, smbXcli_req_destructor);
+ tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
if (!smbXcli_conn_receive_next(conn)) {
/*
* We're the first ones, add the read_smb request that waits for the
* answer from the server
*/
- conn->read_smb_req = read_smb_send(conn->pending, state->ev, conn->fd);
+ conn->read_smb_req = read_smb_send(conn->pending,
+ state->ev,
+ conn->read_fd);
if (conn->read_smb_req == NULL) {
return false;
}
void smbXcli_conn_disconnect(struct smbXcli_conn *conn, NTSTATUS status)
{
- if (conn->fd != -1) {
- close(conn->fd);
+ tevent_queue_stop(conn->outgoing);
+
+ if (conn->read_fd != -1) {
+ close(conn->read_fd);
}
- conn->fd = -1;
+ if (conn->write_fd != -1) {
+ close(conn->write_fd);
+ }
+ conn->read_fd = -1;
+ conn->write_fd = -1;
/*
* Cancel all pending requests. We do not do a for-loop walking
/*
* we need to defer the callback, because we may notify
- * more then one caller.
+ * more than one caller.
*/
tevent_req_defer_callback(req, state->ev);
tevent_req_nterror(req, status);
*_flags2 = flags2;
}
+static void smb1cli_req_cancel_done(struct tevent_req *subreq);
+
+static bool smb1cli_req_cancel(struct tevent_req *req)
+{
+ struct smbXcli_req_state *state =
+ tevent_req_data(req,
+ struct smbXcli_req_state);
+ uint8_t flags;
+ uint16_t flags2;
+ uint32_t pid;
+ uint16_t tid;
+ uint16_t uid;
+ uint16_t mid;
+ struct tevent_req *subreq;
+ NTSTATUS status;
+
+ flags = CVAL(state->smb1.hdr, HDR_FLG);
+ flags2 = SVAL(state->smb1.hdr, HDR_FLG2);
+ pid = SVAL(state->smb1.hdr, HDR_PID);
+ pid |= SVAL(state->smb1.hdr, HDR_PIDHIGH)<<16;
+ tid = SVAL(state->smb1.hdr, HDR_TID);
+ uid = SVAL(state->smb1.hdr, HDR_UID);
+ mid = SVAL(state->smb1.hdr, HDR_MID);
+
+ subreq = smb1cli_req_create(state, state->ev,
+ state->conn,
+ SMBntcancel,
+ flags, 0,
+ flags2, 0,
+ 0, /* timeout */
+ pid, tid, uid,
+ 0, NULL, /* vwv */
+ 0, NULL); /* bytes */
+ if (subreq == NULL) {
+ return false;
+ }
+ smb1cli_req_set_mid(subreq, mid);
+
+ status = smb1cli_req_chain_submit(&subreq, 1);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(subreq);
+ return false;
+ }
+ smb1cli_req_set_mid(subreq, 0);
+
+ tevent_req_set_callback(subreq, smb1cli_req_cancel_done, NULL);
+
+ return true;
+}
+
+static void smb1cli_req_cancel_done(struct tevent_req *subreq)
+{
+ /* we do not care about the result */
+ TALLOC_FREE(subreq);
+}
+
struct tevent_req *smb1cli_req_create(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
SSVAL(state->smb1.hdr, HDR_PID, pid);
SSVAL(state->smb1.hdr, HDR_UID, uid);
SSVAL(state->smb1.hdr, HDR_MID, 0); /* this comes later */
- SSVAL(state->smb1.hdr, HDR_WCT, wct);
+ SCVAL(state->smb1.hdr, HDR_WCT, wct);
state->smb1.vwv = vwv;
case SMBtranss:
case SMBtranss2:
case SMBnttranss:
+ state->one_way = true;
+ break;
case SMBntcancel:
state->one_way = true;
+ state->smb1.one_way_seqnum = true;
break;
case SMBlockingX:
if ((wct == 8) &&
static NTSTATUS smb1cli_conn_signv(struct smbXcli_conn *conn,
struct iovec *iov, int iov_count,
- uint32_t *seqnum)
+ uint32_t *seqnum,
+ bool one_way_seqnum)
{
+ TALLOC_CTX *frame = NULL;
uint8_t *buf;
/*
return NT_STATUS_INVALID_PARAMETER_MIX;
}
- buf = smbXcli_iov_concat(talloc_tos(), iov, iov_count);
+ frame = talloc_stackframe();
+
+ buf = smbXcli_iov_concat(frame, iov, iov_count);
if (buf == NULL) {
return NT_STATUS_NO_MEMORY;
}
- *seqnum = smb_signing_next_seqnum(conn->smb1.signing, false);
+ *seqnum = smb_signing_next_seqnum(conn->smb1.signing,
+ one_way_seqnum);
smb_signing_sign_pdu(conn->smb1.signing, buf, *seqnum);
memcpy(iov[1].iov_base, buf+4, iov[1].iov_len);
- TALLOC_FREE(buf);
+ TALLOC_FREE(frame);
return NT_STATUS_OK;
}
{
struct tevent_req *subreq;
NTSTATUS status;
+ uint8_t cmd;
uint16_t mid;
if (!smbXcli_conn_is_connected(state->conn)) {
return NT_STATUS_INVALID_PARAMETER_MIX;
}
+ cmd = CVAL(iov[1].iov_base, HDR_COM);
+ if (cmd == SMBreadBraw) {
+ if (smbXcli_conn_has_async_calls(state->conn)) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+ state->conn->smb1.read_braw_req = req;
+ }
+
if (state->smb1.mid != 0) {
mid = state->smb1.mid;
} else {
_smb_setlen_nbt(iov[0].iov_base, smbXcli_iov_len(&iov[1], iov_count-1));
status = smb1cli_conn_signv(state->conn, iov, iov_count,
- &state->smb1.seqnum);
+ &state->smb1.seqnum,
+ state->smb1.one_way_seqnum);
if (!NT_STATUS_IS_OK(status)) {
return status;
state->conn->dispatch_incoming = smb1cli_conn_dispatch_incoming;
}
+ tevent_req_set_cancel_fn(req, smbXcli_req_cancel);
+
subreq = writev_send(state, state->ev, state->conn->outgoing,
- state->conn->fd, false, iov, iov_count);
+ state->conn->write_fd, false, iov, iov_count);
if (subreq == NULL) {
return NT_STATUS_NO_MEMORY;
}
size_t num_chained = 0;
size_t num_responses = 0;
+ if (conn->smb1.read_braw_req != NULL) {
+ req = conn->smb1.read_braw_req;
+ conn->smb1.read_braw_req = NULL;
+ state = tevent_req_data(req, struct smbXcli_req_state);
+
+ smbXcli_req_unset_pending(req);
+
+ if (state->smb1.recv_iov == NULL) {
+ /*
+ * For requests with more than
+ * one response, we have to readd the
+ * recv_iov array.
+ */
+ state->smb1.recv_iov = talloc_zero_array(state,
+ struct iovec,
+ 3);
+ if (tevent_req_nomem(state->smb1.recv_iov, req)) {
+ return NT_STATUS_OK;
+ }
+ }
+
+ state->smb1.recv_iov[0].iov_base = (void *)(inbuf + NBT_HDR_SIZE);
+ state->smb1.recv_iov[0].iov_len = smb_len_nbt(inbuf);
+ ZERO_STRUCT(state->smb1.recv_iov[1]);
+ ZERO_STRUCT(state->smb1.recv_iov[2]);
+
+ state->smb1.recv_cmd = SMBreadBraw;
+ state->smb1.recv_status = NT_STATUS_OK;
+ state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
+
+ tevent_req_done(req);
+ return NT_STATUS_OK;
+ }
+
if ((IVAL(inhdr, 0) != SMB_MAGIC) /* 0xFF"SMB" */
&& (SVAL(inhdr, 0) != 0x45ff)) /* 0xFF"E" */ {
DEBUG(10, ("Got non-SMB PDU\n"));
smbXcli_req_unset_pending(req);
+ if (state->smb1.recv_iov == NULL) {
+ /*
+ * For requests with more than
+ * one response, we have to readd the
+ * recv_iov array.
+ */
+ state->smb1.recv_iov = talloc_zero_array(state,
+ struct iovec,
+ 3);
+ if (tevent_req_nomem(state->smb1.recv_iov, req)) {
+ return NT_STATUS_OK;
+ }
+ }
+
state->smb1.recv_cmd = cmd;
state->smb1.recv_status = status;
state->inbuf = talloc_move(state->smb1.recv_iov, &inbuf);
continue;
}
+ if (state->smb1.recv_iov == NULL) {
+ /*
+ * For requests with more than
+ * one response, we have to readd the
+ * recv_iov array.
+ */
+ state->smb1.recv_iov = talloc_zero_array(state,
+ struct iovec,
+ 3);
+ if (tevent_req_nomem(state->smb1.recv_iov, req)) {
+ continue;
+ }
+ }
+
state->smb1.recv_cmd = cmd;
if (i == (num_responses - 1)) {
if (state->inbuf != NULL) {
recv_iov = state->smb1.recv_iov;
- hdr = (uint8_t *)recv_iov[0].iov_base;
- wct = recv_iov[1].iov_len/2;
- vwv = (uint16_t *)recv_iov[1].iov_base;
- vwv_offset = PTR_DIFF(vwv, hdr);
- num_bytes = recv_iov[2].iov_len;
- bytes = (uint8_t *)recv_iov[2].iov_base;
- bytes_offset = PTR_DIFF(bytes, hdr);
+ state->smb1.recv_iov = NULL;
+ if (state->smb1.recv_cmd != SMBreadBraw) {
+ hdr = (uint8_t *)recv_iov[0].iov_base;
+ wct = recv_iov[1].iov_len/2;
+ vwv = (uint16_t *)recv_iov[1].iov_base;
+ vwv_offset = PTR_DIFF(vwv, hdr);
+ num_bytes = recv_iov[2].iov_len;
+ bytes = (uint8_t *)recv_iov[2].iov_base;
+ bytes_offset = PTR_DIFF(bytes, hdr);
+ }
}
if (tevent_req_is_nterror(req, &status)) {
return conn->smb2.server.max_write_size;
}
+void smb2cli_conn_set_max_credits(struct smbXcli_conn *conn,
+ uint16_t max_credits)
+{
+ conn->smb2.max_credits = max_credits;
+}
+
+static void smb2cli_req_cancel_done(struct tevent_req *subreq);
+
+static bool smb2cli_req_cancel(struct tevent_req *req)
+{
+ struct smbXcli_req_state *state =
+ tevent_req_data(req,
+ struct smbXcli_req_state);
+ uint32_t flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
+ uint32_t pid = IVAL(state->smb2.hdr, SMB2_HDR_PID);
+ uint32_t tid = IVAL(state->smb2.hdr, SMB2_HDR_TID);
+ uint64_t mid = BVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID);
+ uint64_t aid = BVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID);
+ struct smbXcli_session *session = state->session;
+ uint8_t *fixed = state->smb2.pad;
+ uint16_t fixed_len = 4;
+ struct tevent_req *subreq;
+ struct smbXcli_req_state *substate;
+ NTSTATUS status;
+
+ SSVAL(fixed, 0, 0x04);
+ SSVAL(fixed, 2, 0);
+
+ subreq = smb2cli_req_create(state, state->ev,
+ state->conn,
+ SMB2_OP_CANCEL,
+ flags, 0,
+ 0, /* timeout */
+ pid, tid, session,
+ fixed, fixed_len,
+ NULL, 0);
+ if (subreq == NULL) {
+ return false;
+ }
+ substate = tevent_req_data(subreq, struct smbXcli_req_state);
+
+ if (flags & SMB2_HDR_FLAG_ASYNC) {
+ mid = 0;
+ }
+
+ SIVAL(substate->smb2.hdr, SMB2_HDR_FLAGS, flags);
+ SIVAL(substate->smb2.hdr, SMB2_HDR_PID, pid);
+ SIVAL(substate->smb2.hdr, SMB2_HDR_TID, tid);
+ SBVAL(substate->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
+ SBVAL(substate->smb2.hdr, SMB2_HDR_ASYNC_ID, aid);
+
+ status = smb2cli_req_compound_submit(&subreq, 1);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(subreq);
+ return false;
+ }
+
+ tevent_req_set_callback(subreq, smb2cli_req_cancel_done, NULL);
+
+ return true;
+}
+
+static void smb2cli_req_cancel_done(struct tevent_req *subreq)
+{
+ /* we do not care about the result */
+ TALLOC_FREE(subreq);
+}
+
struct tevent_req *smb2cli_req_create(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec,
uint32_t pid,
uint32_t tid,
- uint64_t uid,
+ struct smbXcli_session *session,
const uint8_t *fixed,
uint16_t fixed_len,
const uint8_t *dyn,
struct tevent_req *req;
struct smbXcli_req_state *state;
uint32_t flags = 0;
+ uint64_t uid = 0;
req = tevent_req_create(mem_ctx, &state,
struct smbXcli_req_state);
state->ev = ev;
state->conn = conn;
+ state->session = session;
+
+ if (session) {
+ uid = session->smb2.session_id;
+
+ state->smb2.should_sign = session->smb2.should_sign;
+
+ if (cmd == SMB2_OP_SESSSETUP &&
+ session->smb2.signing_key.length != 0) {
+ state->smb2.should_sign = true;
+ }
+ }
state->smb2.recv_iov = talloc_zero_array(state, struct iovec, 3);
if (state->smb2.recv_iov == NULL) {
SIVAL(state->smb2.hdr, SMB2_HDR_PROTOCOL_ID, SMB2_MAGIC);
SSVAL(state->smb2.hdr, SMB2_HDR_LENGTH, SMB2_HDR_BODY);
- SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, 1);
- SIVAL(state->smb2.hdr, SMB2_HDR_STATUS, NT_STATUS_V(NT_STATUS_OK));
SSVAL(state->smb2.hdr, SMB2_HDR_OPCODE, cmd);
- SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, 31);
SIVAL(state->smb2.hdr, SMB2_HDR_FLAGS, flags);
SIVAL(state->smb2.hdr, SMB2_HDR_PID, pid);
SIVAL(state->smb2.hdr, SMB2_HDR_TID, tid);
return req;
}
-static void smb2cli_writev_done(struct tevent_req *subreq);
+void smb2cli_req_set_notify_async(struct tevent_req *req)
+{
+ struct smbXcli_req_state *state =
+ tevent_req_data(req,
+ struct smbXcli_req_state);
+
+ state->smb2.notify_async = true;
+}
+
+static void smb2cli_req_writev_done(struct tevent_req *subreq);
static NTSTATUS smb2cli_conn_dispatch_incoming(struct smbXcli_conn *conn,
TALLOC_CTX *tmp_mem,
uint8_t *inbuf);
nbt_len = 0;
for (i=0; i<num_reqs; i++) {
+ int hdr_iov;
size_t reqlen;
bool ret;
+ uint16_t opcode;
+ uint64_t avail;
+ uint16_t charge;
+ uint16_t credits;
uint64_t mid;
+ const DATA_BLOB *signing_key = NULL;
if (!tevent_req_is_in_progress(reqs[i])) {
return NT_STATUS_INTERNAL_ERROR;
return NT_STATUS_REVISION_MISMATCH;
}
- if (state->conn->smb2.mid == UINT64_MAX) {
- return NT_STATUS_CONNECTION_ABORTED;
+ opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
+ if (opcode == SMB2_OP_CANCEL) {
+ goto skip_credits;
}
- mid = state->conn->smb2.mid;
- state->conn->smb2.mid += 1;
+ avail = UINT64_MAX - state->conn->smb2.mid;
+ if (avail < 1) {
+ return NT_STATUS_CONNECTION_ABORTED;
+ }
- SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
+ if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
+ charge = (MAX(state->smb2.dyn_len, 1) - 1)/ 65536 + 1;
+ } else {
+ charge = 1;
+ }
- iov[num_iov].iov_base = state->smb2.hdr;
- iov[num_iov].iov_len = sizeof(state->smb2.hdr);
- num_iov += 1;
+ charge = MAX(state->smb2.credit_charge, charge);
- iov[num_iov].iov_base = discard_const(state->smb2.fixed);
- iov[num_iov].iov_len = state->smb2.fixed_len;
- num_iov += 1;
+ avail = MIN(avail, state->conn->smb2.cur_credits);
+ if (avail < charge) {
+ return NT_STATUS_INTERNAL_ERROR;
+ }
- if (state->smb2.dyn != NULL) {
- iov[num_iov].iov_base = discard_const(state->smb2.dyn);
- iov[num_iov].iov_len = state->smb2.dyn_len;
- num_iov += 1;
+ credits = 0;
+ if (state->conn->smb2.max_credits > state->conn->smb2.cur_credits) {
+ credits = state->conn->smb2.max_credits -
+ state->conn->smb2.cur_credits;
+ }
+ if (state->conn->smb2.max_credits >= state->conn->smb2.cur_credits) {
+ credits += 1;
}
- reqlen = sizeof(state->smb2.hdr);
+ mid = state->conn->smb2.mid;
+ state->conn->smb2.mid += charge;
+ state->conn->smb2.cur_credits -= charge;
+
+ if (state->conn->smb2.server.capabilities & SMB2_CAP_LARGE_MTU) {
+ SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT_CHARGE, charge);
+ }
+ SSVAL(state->smb2.hdr, SMB2_HDR_CREDIT, credits);
+ SBVAL(state->smb2.hdr, SMB2_HDR_MESSAGE_ID, mid);
+
+skip_credits:
+ if (state->session) {
+ /*
+ * We prefer the channel signing key if it is
+ * already there.
+ */
+ if (state->smb2.should_sign) {
+ signing_key = &state->session->smb2.channel_signing_key;
+ }
+
+ /*
+ * If it is a channel binding, we already have the main
+ * signing key and try that one.
+ */
+ if (signing_key && signing_key->length == 0) {
+ signing_key = &state->session->smb2.signing_key;
+ }
+
+ /*
+ * If we do not have any session key yet, we skip the
+ * signing of SMB2_OP_SESSSETUP requests.
+ */
+ if (signing_key && signing_key->length == 0) {
+ signing_key = NULL;
+ }
+ }
+
+ hdr_iov = num_iov;
+ iov[num_iov].iov_base = state->smb2.hdr;
+ iov[num_iov].iov_len = sizeof(state->smb2.hdr);
+ num_iov += 1;
+
+ iov[num_iov].iov_base = discard_const(state->smb2.fixed);
+ iov[num_iov].iov_len = state->smb2.fixed_len;
+ num_iov += 1;
+
+ if (state->smb2.dyn != NULL) {
+ iov[num_iov].iov_base = discard_const(state->smb2.dyn);
+ iov[num_iov].iov_len = state->smb2.dyn_len;
+ num_iov += 1;
+ }
+
+ reqlen = sizeof(state->smb2.hdr);
reqlen += state->smb2.fixed_len;
reqlen += state->smb2.dyn_len;
}
nbt_len += reqlen;
+ if (signing_key) {
+ NTSTATUS status;
+
+ status = smb2_signing_sign_pdu(*signing_key,
+ state->session->conn->protocol,
+ &iov[hdr_iov], num_iov - hdr_iov);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+ }
+
ret = smbXcli_req_set_pending(reqs[i]);
if (!ret) {
return NT_STATUS_NO_MEMORY;
}
}
- /*
- * TODO: Do signing here
- */
-
state = tevent_req_data(reqs[0], struct smbXcli_req_state);
_smb_setlen_tcp(state->length_hdr, nbt_len);
iov[0].iov_base = state->length_hdr;
}
subreq = writev_send(state, state->ev, state->conn->outgoing,
- state->conn->fd, false, iov, num_iov);
+ state->conn->write_fd, false, iov, num_iov);
if (subreq == NULL) {
return NT_STATUS_NO_MEMORY;
}
- tevent_req_set_callback(subreq, smb2cli_writev_done, reqs[0]);
+ tevent_req_set_callback(subreq, smb2cli_req_writev_done, reqs[0]);
return NT_STATUS_OK;
}
+void smb2cli_req_set_credit_charge(struct tevent_req *req, uint16_t charge)
+{
+ struct smbXcli_req_state *state =
+ tevent_req_data(req,
+ struct smbXcli_req_state);
+
+ state->smb2.credit_charge = charge;
+}
+
struct tevent_req *smb2cli_req_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbXcli_conn *conn,
uint32_t timeout_msec,
uint32_t pid,
uint32_t tid,
- uint64_t uid,
+ struct smbXcli_session *session,
const uint8_t *fixed,
uint16_t fixed_len,
const uint8_t *dyn,
req = smb2cli_req_create(mem_ctx, ev, conn, cmd,
additional_flags, clear_flags,
timeout_msec,
- pid, tid, uid,
+ pid, tid, session,
fixed, fixed_len, dyn, dyn_len);
if (req == NULL) {
return NULL;
return req;
}
-static void smb2cli_writev_done(struct tevent_req *subreq)
+static void smb2cli_req_writev_done(struct tevent_req *subreq)
{
struct tevent_req *req =
tevent_req_callback_data(subreq,
}
}
-static NTSTATUS smb2cli_inbuf_parse_compound(uint8_t *buf, TALLOC_CTX *mem_ctx,
+static NTSTATUS smb2cli_inbuf_parse_compound(struct smbXcli_conn *conn,
+ uint8_t *buf,
+ size_t buflen,
+ TALLOC_CTX *mem_ctx,
struct iovec **piov, int *pnum_iov)
{
struct iovec *iov;
- int num_iov;
- size_t buflen;
- size_t taken;
- uint8_t *first_hdr;
-
- num_iov = 0;
+ int num_iov = 0;
+ size_t taken = 0;
+ uint8_t *first_hdr = buf;
iov = talloc_array(mem_ctx, struct iovec, num_iov);
if (iov == NULL) {
return NT_STATUS_NO_MEMORY;
}
- buflen = smb_len_tcp(buf);
- taken = 0;
- first_hdr = buf + NBT_HDR_SIZE;
-
while (taken < buflen) {
+ uint8_t *tf = NULL;
+ size_t tf_len = 0;
size_t len = buflen - taken;
uint8_t *hdr = first_hdr + taken;
struct iovec *cur;
uint16_t body_size;
struct iovec *iov_tmp;
+ if (len < 4) {
+ DEBUG(10, ("%d bytes left, expected at least %d\n",
+ (int)len, 4));
+ goto inval;
+ }
+ if (IVAL(hdr, 0) == SMB2_TF_MAGIC) {
+ struct smbXcli_session *s;
+ uint64_t uid;
+ struct iovec tf_iov[2];
+ NTSTATUS status;
+
+ if (len < SMB2_TF_HDR_SIZE) {
+ DEBUG(10, ("%d bytes left, expected at least %d\n",
+ (int)len, SMB2_TF_HDR_SIZE));
+ goto inval;
+ }
+ tf = hdr;
+ tf_len = SMB2_TF_HDR_SIZE;
+ taken += tf_len;
+
+ hdr = first_hdr + taken;
+ len = IVAL(tf, SMB2_TF_MSG_SIZE);
+ uid = BVAL(tf, SMB2_TF_SESSION_ID);
+
+ s = conn->sessions;
+ for (; s; s = s->next) {
+ if (s->smb2.session_id != uid) {
+ continue;
+ }
+ break;
+ }
+
+ if (s == NULL) {
+ DEBUG(10, ("unknown session_id %llu\n",
+ (unsigned long long)uid));
+ goto inval;
+ }
+
+ tf_iov[0].iov_base = (void *)tf;
+ tf_iov[0].iov_len = tf_len;
+ tf_iov[1].iov_base = (void *)hdr;
+ tf_iov[1].iov_len = len;
+
+ status = smb2_signing_decrypt_pdu(s->smb2.decryption_key,
+ conn->protocol,
+ tf_iov, 2);
+ if (!NT_STATUS_IS_OK(status)) {
+ TALLOC_FREE(iov);
+ return status;
+ }
+ }
+
/*
* We need the header plus the body length field
*/
if (next_command_ofs > full_size) {
goto inval;
}
+ if (tf && next_command_ofs < len) {
+ goto inval;
+ }
full_size = next_command_ofs;
}
if (body_size < 2) {
}
iov_tmp = talloc_realloc(mem_ctx, iov, struct iovec,
- num_iov + 3);
+ num_iov + 4);
if (iov_tmp == NULL) {
TALLOC_FREE(iov);
return NT_STATUS_NO_MEMORY;
}
iov = iov_tmp;
cur = &iov[num_iov];
- num_iov += 3;
+ num_iov += 4;
- cur[0].iov_base = hdr;
- cur[0].iov_len = SMB2_HDR_BODY;
- cur[1].iov_base = hdr + SMB2_HDR_BODY;
- cur[1].iov_len = body_size;
- cur[2].iov_base = hdr + SMB2_HDR_BODY + body_size;
- cur[2].iov_len = full_size - (SMB2_HDR_BODY + body_size);
+ cur[0].iov_base = tf;
+ cur[0].iov_len = tf_len;
+ cur[1].iov_base = hdr;
+ cur[1].iov_len = SMB2_HDR_BODY;
+ cur[2].iov_base = hdr + SMB2_HDR_BODY;
+ cur[2].iov_len = body_size;
+ cur[3].iov_base = hdr + SMB2_HDR_BODY + body_size;
+ cur[3].iov_len = full_size - (SMB2_HDR_BODY + body_size);
taken += full_size;
}
int i, num_iov;
NTSTATUS status;
bool defer = true;
+ struct smbXcli_session *last_session = NULL;
+ size_t inbuf_len = smb_len_tcp(inbuf);
- status = smb2cli_inbuf_parse_compound(inbuf, tmp_mem,
+ status = smb2cli_inbuf_parse_compound(conn,
+ inbuf + NBT_HDR_SIZE,
+ inbuf_len,
+ tmp_mem,
&iov, &num_iov);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
- for (i=0; i<num_iov; i+=3) {
+ for (i=0; i<num_iov; i+=4) {
uint8_t *inbuf_ref = NULL;
struct iovec *cur = &iov[i];
- uint8_t *inhdr = (uint8_t *)cur[0].iov_base;
+ uint8_t *inhdr = (uint8_t *)cur[1].iov_base;
uint16_t opcode = SVAL(inhdr, SMB2_HDR_OPCODE);
uint32_t flags = IVAL(inhdr, SMB2_HDR_FLAGS);
uint64_t mid = BVAL(inhdr, SMB2_HDR_MESSAGE_ID);
uint16_t req_opcode;
+ uint32_t req_flags;
+ uint16_t credits = SVAL(inhdr, SMB2_HDR_CREDIT);
+ uint32_t new_credits;
+ struct smbXcli_session *session = NULL;
+ const DATA_BLOB *signing_key = NULL;
+
+ new_credits = conn->smb2.cur_credits;
+ new_credits += credits;
+ if (new_credits > UINT16_MAX) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+ conn->smb2.cur_credits += credits;
req = smb2cli_conn_find_pending(conn, mid);
if (req == NULL) {
}
state = tevent_req_data(req, struct smbXcli_req_state);
+ state->smb2.got_async = false;
+
req_opcode = SVAL(state->smb2.hdr, SMB2_HDR_OPCODE);
if (opcode != req_opcode) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
+ req_flags = SVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
if (!(flags & SMB2_HDR_FLAG_REDIRECT)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
status = NT_STATUS(IVAL(inhdr, SMB2_HDR_STATUS));
if ((flags & SMB2_HDR_FLAG_ASYNC) &&
NT_STATUS_EQUAL(status, STATUS_PENDING)) {
- uint32_t req_flags = IVAL(state->smb2.hdr, SMB2_HDR_FLAGS);
uint64_t async_id = BVAL(inhdr, SMB2_HDR_ASYNC_ID);
+ /*
+ * async interim responses are not signed,
+ * even if the SMB2_HDR_FLAG_SIGNED flag
+ * is set.
+ */
req_flags |= SMB2_HDR_FLAG_ASYNC;
SBVAL(state->smb2.hdr, SMB2_HDR_FLAGS, req_flags);
SBVAL(state->smb2.hdr, SMB2_HDR_ASYNC_ID, async_id);
+
+ if (state->smb2.notify_async) {
+ state->smb2.got_async = true;
+ tevent_req_defer_callback(req, state->ev);
+ tevent_req_notify_callback(req);
+ }
continue;
}
+ session = state->session;
+ if (req_flags & SMB2_HDR_FLAG_CHAINED) {
+ session = last_session;
+ }
+ last_session = session;
+
+ if (state->smb2.should_sign) {
+ if (!(flags & SMB2_HDR_FLAG_SIGNED)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ }
+
+ if (flags & SMB2_HDR_FLAG_SIGNED) {
+ uint64_t uid = BVAL(inhdr, SMB2_HDR_SESSION_ID);
+
+ if (session == NULL) {
+ struct smbXcli_session *s;
+
+ s = state->conn->sessions;
+ for (; s; s = s->next) {
+ if (s->smb2.session_id != uid) {
+ continue;
+ }
+
+ session = s;
+ break;
+ }
+ }
+
+ if (session == NULL) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
+ last_session = session;
+ signing_key = &session->smb2.channel_signing_key;
+ }
+
+ if (opcode == SMB2_OP_SESSSETUP) {
+ /*
+ * We prefer the channel signing key, if it is
+ * already there.
+ *
+ * If we do not have a channel signing key yet,
+ * we try the main signing key, if it is not
+ * the final response.
+ */
+ if (signing_key && signing_key->length == 0 &&
+ !NT_STATUS_IS_OK(status)) {
+ signing_key = &session->smb2.signing_key;
+ }
+
+ if (signing_key && signing_key->length == 0) {
+ /*
+ * If we do not have a session key to
+ * verify the signature, we defer the
+ * signing check to the caller.
+ *
+ * The caller gets NT_STATUS_OK, it
+ * has to call
+ * smb2cli_session_set_session_key()
+ * or
+ * smb2cli_session_set_channel_key()
+ * which will check the signature
+ * with the channel signing key.
+ */
+ signing_key = NULL;
+ }
+ }
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_USER_SESSION_DELETED)) {
+ /*
+ * if the server returns NT_STATUS_USER_SESSION_DELETED
+ * the response is not signed and we should
+ * propagate the NT_STATUS_USER_SESSION_DELETED
+ * status to the caller.
+ */
+ signing_key = NULL;
+ }
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_NAME_DELETED) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_FILE_CLOSED) ||
+ NT_STATUS_EQUAL(status, NT_STATUS_INVALID_PARAMETER)) {
+ /*
+ * if the server returns
+ * NT_STATUS_NETWORK_NAME_DELETED
+ * NT_STATUS_FILE_CLOSED
+ * NT_STATUS_INVALID_PARAMETER
+ * the response might not be signed
+ * as this happens before the signing checks.
+ *
+ * If server echos the signature (or all zeros)
+ * we should report the status from the server
+ * to the caller.
+ */
+ if (signing_key) {
+ int cmp;
+
+ cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
+ state->smb2.hdr+SMB2_HDR_SIGNATURE,
+ 16);
+ if (cmp == 0) {
+ state->smb2.signing_skipped = true;
+ signing_key = NULL;
+ }
+ }
+ if (signing_key) {
+ int cmp;
+ static const uint8_t zeros[16];
+
+ cmp = memcmp(inhdr+SMB2_HDR_SIGNATURE,
+ zeros,
+ 16);
+ if (cmp == 0) {
+ state->smb2.signing_skipped = true;
+ signing_key = NULL;
+ }
+ }
+ }
+
+ if (signing_key) {
+ status = smb2_signing_check_pdu(*signing_key,
+ state->conn->protocol,
+ &cur[1], 3);
+ if (!NT_STATUS_IS_OK(status)) {
+ /*
+ * If the signing check fails, we disconnect
+ * the connection.
+ */
+ return status;
+ }
+ }
+
smbXcli_req_unset_pending(req);
/*
* There might be more than one response
* we need to defer the notifications
*/
- if ((num_iov == 4) && (talloc_array_length(conn->pending) == 0)) {
+ if ((num_iov == 5) && (talloc_array_length(conn->pending) == 0)) {
defer = false;
}
}
/* copy the related buffers */
- state->smb2.recv_iov[0] = cur[0];
- state->smb2.recv_iov[1] = cur[1];
- state->smb2.recv_iov[2] = cur[2];
+ state->smb2.recv_iov[0] = cur[1];
+ state->smb2.recv_iov[1] = cur[2];
+ state->smb2.recv_iov[2] = cur[3];
tevent_req_done(req);
}
*piov = NULL;
}
+ if (state->smb2.got_async) {
+ return STATUS_PENDING;
+ }
+
if (tevent_req_is_nterror(req, &status)) {
for (i=0; i < num_expected; i++) {
if (NT_STATUS_EQUAL(status, expected[i].status)) {
return status;
}
+ if (state->smb2.signing_skipped) {
+ if (num_expected > 0) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ if (!NT_STATUS_IS_ERR(status)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ }
+
if (!found_size) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
} smb2cli_prots[] = {
{PROTOCOL_SMB2_02, SMB2_DIALECT_REVISION_202},
{PROTOCOL_SMB2_10, SMB2_DIALECT_REVISION_210},
+ {PROTOCOL_SMB2_22, SMB2_DIALECT_REVISION_222},
+ {PROTOCOL_SMB2_24, SMB2_DIALECT_REVISION_224},
+ {PROTOCOL_SMB3_00, SMB3_DIALECT_REVISION_300},
};
struct smbXcli_negprot_state {
SSVAL(buf, 2, dialect_count);
SSVAL(buf, 4, state->conn->smb2.client.security_mode);
SSVAL(buf, 6, 0); /* Reserved */
- SSVAL(buf, 8, 0); /* Capabilities */
+ if (state->max_protocol >= PROTOCOL_SMB2_22) {
+ SIVAL(buf, 8, state->conn->smb2.client.capabilities);
+ } else {
+ SIVAL(buf, 8, 0); /* Capabilities */
+ }
if (state->max_protocol >= PROTOCOL_SMB2_10) {
NTSTATUS status;
DATA_BLOB blob;
state->conn, SMB2_OP_NEGPROT,
0, 0, /* flags */
state->timeout_msec,
- 0xFEFF, 0, 0, /* pid, tid, uid */
+ 0xFEFF, 0, NULL, /* pid, tid, session */
state->smb2.fixed, sizeof(state->smb2.fixed),
state->smb2.dyn, dialect_count*2);
}
/*
* send a SMB2 negprot, in order to negotiate
- * the SMB2 dialect. This needs to use the
- * message id 1.
+ * the SMB2 dialect.
*/
- state->conn->smb2.mid = 1;
subreq = smbXcli_negprot_smb2_subreq(state);
if (tevent_req_nomem(subreq, req)) {
return;
struct tevent_req *subreq;
struct smbXcli_req_state *substate;
struct tevent_req *req;
- struct smbXcli_negprot_state *state;
- uint32_t protocol_magic = IVAL(inbuf, 4);
+ uint32_t protocol_magic;
+ size_t inbuf_len = smb_len_nbt(inbuf);
if (num_pending != 1) {
return NT_STATUS_INTERNAL_ERROR;
}
+ if (inbuf_len < 4) {
+ return NT_STATUS_INVALID_NETWORK_RESPONSE;
+ }
+
subreq = conn->pending[0];
substate = tevent_req_data(subreq, struct smbXcli_req_state);
req = tevent_req_callback_data(subreq, struct tevent_req);
- state = tevent_req_data(req, struct smbXcli_negprot_state);
+
+ protocol_magic = IVAL(inbuf, 4);
switch (protocol_magic) {
case SMB_MAGIC:
substate->smb1.recv_iov = NULL;
}
+ /*
+ * we got an SMB2 answer, which consumed sequence number 0
+ * so we need to use 1 as the next one
+ */
+ conn->smb2.mid = 1;
tevent_req_set_callback(subreq, smbXcli_negprot_smb2_done, req);
conn->dispatch_incoming = smb2cli_conn_dispatch_incoming;
return smb2cli_conn_dispatch_incoming(conn, tmp_mem, inbuf);
TALLOC_FREE(frame);
return status;
}
+
+static int smbXcli_session_destructor(struct smbXcli_session *session)
+{
+ if (session->conn == NULL) {
+ return 0;
+ }
+
+ DLIST_REMOVE(session->conn->sessions, session);
+ return 0;
+}
+
+struct smbXcli_session *smbXcli_session_create(TALLOC_CTX *mem_ctx,
+ struct smbXcli_conn *conn)
+{
+ struct smbXcli_session *session;
+
+ session = talloc_zero(mem_ctx, struct smbXcli_session);
+ if (session == NULL) {
+ return NULL;
+ }
+ talloc_set_destructor(session, smbXcli_session_destructor);
+
+ DLIST_ADD_END(conn->sessions, session, struct smbXcli_session *);
+ session->conn = conn;
+
+ return session;
+}
+
+uint8_t smb2cli_session_security_mode(struct smbXcli_session *session)
+{
+ struct smbXcli_conn *conn = session->conn;
+ uint8_t security_mode = 0;
+
+ if (conn == NULL) {
+ return security_mode;
+ }
+
+ security_mode = SMB2_NEGOTIATE_SIGNING_ENABLED;
+ if (conn->mandatory_signing) {
+ security_mode |= SMB2_NEGOTIATE_SIGNING_REQUIRED;
+ }
+
+ return security_mode;
+}
+
+uint64_t smb2cli_session_current_id(struct smbXcli_session *session)
+{
+ return session->smb2.session_id;
+}
+
+uint16_t smb2cli_session_get_flags(struct smbXcli_session *session)
+{
+ return session->smb2.session_flags;
+}
+
+NTSTATUS smb2cli_session_application_key(struct smbXcli_session *session,
+ TALLOC_CTX *mem_ctx,
+ DATA_BLOB *key)
+{
+ *key = data_blob_null;
+
+ if (session->smb2.application_key.length == 0) {
+ return NT_STATUS_NO_USER_SESSION_KEY;
+ }
+
+ *key = data_blob_dup_talloc(mem_ctx, session->smb2.application_key);
+ if (key->data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ return NT_STATUS_OK;
+}
+
+void smb2cli_session_set_id_and_flags(struct smbXcli_session *session,
+ uint64_t session_id,
+ uint16_t session_flags)
+{
+ session->smb2.session_id = session_id;
+ session->smb2.session_flags = session_flags;
+}
+
+NTSTATUS smb2cli_session_set_session_key(struct smbXcli_session *session,
+ const DATA_BLOB _session_key,
+ const struct iovec *recv_iov)
+{
+ struct smbXcli_conn *conn = session->conn;
+ uint16_t no_sign_flags;
+ uint8_t session_key[16];
+ NTSTATUS status;
+
+ if (conn == NULL) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+
+ no_sign_flags = SMB2_SESSION_FLAG_IS_GUEST | SMB2_SESSION_FLAG_IS_NULL;
+
+ if (session->smb2.session_flags & no_sign_flags) {
+ session->smb2.should_sign = false;
+ return NT_STATUS_OK;
+ }
+
+ if (session->smb2.signing_key.length != 0) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+
+ ZERO_STRUCT(session_key);
+ memcpy(session_key, _session_key.data,
+ MIN(_session_key.length, sizeof(session_key)));
+
+ session->smb2.signing_key = data_blob_talloc(session,
+ session_key,
+ sizeof(session_key));
+ if (session->smb2.signing_key.data == NULL) {
+ ZERO_STRUCT(session_key);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (conn->protocol >= PROTOCOL_SMB2_24) {
+ const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
+ const DATA_BLOB context = data_blob_string_const_null("SmbSign");
+
+ smb2_key_derivation(session_key, sizeof(session_key),
+ label.data, label.length,
+ context.data, context.length,
+ session->smb2.signing_key.data);
+ }
+
+ session->smb2.encryption_key = data_blob_dup_talloc(session,
+ session->smb2.signing_key);
+ if (session->smb2.encryption_key.data == NULL) {
+ ZERO_STRUCT(session_key);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (conn->protocol >= PROTOCOL_SMB2_24) {
+ const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
+ const DATA_BLOB context = data_blob_string_const_null("ServerIn ");
+
+ smb2_key_derivation(session_key, sizeof(session_key),
+ label.data, label.length,
+ context.data, context.length,
+ session->smb2.encryption_key.data);
+ }
+
+ session->smb2.decryption_key = data_blob_dup_talloc(session,
+ session->smb2.signing_key);
+ if (session->smb2.decryption_key.data == NULL) {
+ ZERO_STRUCT(session_key);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (conn->protocol >= PROTOCOL_SMB2_24) {
+ const DATA_BLOB label = data_blob_string_const_null("SMB2AESCCM");
+ const DATA_BLOB context = data_blob_string_const_null("ServerOut");
+
+ smb2_key_derivation(session_key, sizeof(session_key),
+ label.data, label.length,
+ context.data, context.length,
+ session->smb2.decryption_key.data);
+ }
+
+ session->smb2.application_key = data_blob_dup_talloc(session,
+ session->smb2.signing_key);
+ if (session->smb2.application_key.data == NULL) {
+ ZERO_STRUCT(session_key);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (conn->protocol >= PROTOCOL_SMB2_24) {
+ const DATA_BLOB label = data_blob_string_const_null("SMB2APP");
+ const DATA_BLOB context = data_blob_string_const_null("SmbRpc");
+
+ smb2_key_derivation(session_key, sizeof(session_key),
+ label.data, label.length,
+ context.data, context.length,
+ session->smb2.application_key.data);
+ }
+ ZERO_STRUCT(session_key);
+
+ session->smb2.channel_signing_key = data_blob_dup_talloc(session,
+ session->smb2.signing_key);
+ if (session->smb2.channel_signing_key.data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ status = smb2_signing_check_pdu(session->smb2.channel_signing_key,
+ session->conn->protocol,
+ recv_iov, 3);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ session->smb2.should_sign = false;
+ session->smb2.should_encrypt = false;
+
+ if (conn->desire_signing) {
+ session->smb2.should_sign = true;
+ }
+
+ if (conn->smb2.server.security_mode & SMB2_NEGOTIATE_SIGNING_REQUIRED) {
+ session->smb2.should_sign = true;
+ }
+
+ generate_random_buffer((uint8_t *)&session->smb2.channel_nonce,
+ sizeof(session->smb2.channel_nonce));
+ session->smb2.channel_next = 1;
+
+ return NT_STATUS_OK;
+}
+
+NTSTATUS smb2cli_session_create_channel(TALLOC_CTX *mem_ctx,
+ struct smbXcli_session *session1,
+ struct smbXcli_conn *conn,
+ struct smbXcli_session **_session2)
+{
+ struct smbXcli_session *session2;
+
+ if (session1->smb2.signing_key.length == 0) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+
+ if (session1->smb2.channel_next == 0) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+
+ if (conn == NULL) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+
+ session2 = talloc_zero(mem_ctx, struct smbXcli_session);
+ if (session2 == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+ session2->smb2.session_id = session1->smb2.session_id;
+ session2->smb2.session_flags = session1->smb2.session_flags;
+
+ session2->smb2.signing_key = data_blob_dup_talloc(session2,
+ session1->smb2.signing_key);
+ if (session2->smb2.signing_key.data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ session2->smb2.application_key = data_blob_dup_talloc(session2,
+ session1->smb2.application_key);
+ if (session2->smb2.application_key.data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ session2->smb2.should_sign = session1->smb2.should_sign;
+ session2->smb2.should_encrypt = session1->smb2.should_encrypt;
+
+ session2->smb2.channel_nonce = session1->smb2.channel_nonce;
+ session2->smb2.channel_nonce += session1->smb2.channel_next;
+ session1->smb2.channel_next++;
+
+ session2->smb2.encryption_key = data_blob_dup_talloc(session2,
+ session1->smb2.encryption_key);
+ if (session2->smb2.encryption_key.data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ session2->smb2.decryption_key = data_blob_dup_talloc(session2,
+ session1->smb2.decryption_key);
+ if (session2->smb2.decryption_key.data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ talloc_set_destructor(session2, smbXcli_session_destructor);
+ DLIST_ADD_END(conn->sessions, session2, struct smbXcli_session *);
+ session2->conn = conn;
+
+ *_session2 = session2;
+ return NT_STATUS_OK;
+}
+
+NTSTATUS smb2cli_session_set_channel_key(struct smbXcli_session *session,
+ const DATA_BLOB _channel_key,
+ const struct iovec *recv_iov)
+{
+ struct smbXcli_conn *conn = session->conn;
+ uint8_t channel_key[16];
+ NTSTATUS status;
+
+ if (conn == NULL) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+
+ if (session->smb2.channel_signing_key.length != 0) {
+ return NT_STATUS_INVALID_PARAMETER_MIX;
+ }
+
+ ZERO_STRUCT(channel_key);
+ memcpy(channel_key, _channel_key.data,
+ MIN(_channel_key.length, sizeof(channel_key)));
+
+ session->smb2.channel_signing_key = data_blob_talloc(session,
+ channel_key,
+ sizeof(channel_key));
+ if (session->smb2.channel_signing_key.data == NULL) {
+ ZERO_STRUCT(channel_key);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ if (conn->protocol >= PROTOCOL_SMB2_24) {
+ const DATA_BLOB label = data_blob_string_const_null("SMB2AESCMAC");
+ const DATA_BLOB context = data_blob_string_const_null("SmbSign");
+
+ smb2_key_derivation(channel_key, sizeof(channel_key),
+ label.data, label.length,
+ context.data, context.length,
+ session->smb2.channel_signing_key.data);
+ }
+ ZERO_STRUCT(channel_key);
+
+ status = smb2_signing_check_pdu(session->smb2.channel_signing_key,
+ session->conn->protocol,
+ recv_iov, 3);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
+
+ return NT_STATUS_OK;
+}
git.samba.org / kai / samba.git / blobdiff