struct outstanding_packet_lookup *prev, *next;
};
-/* Store the data for an ongoing trans/trans2/nttrans operation. */
-struct trans_info_context {
- uint16 mid;
- uint32 send_seq_num;
- uint32 reply_seq_num;
-};
-
struct smb_basic_signing_context {
DATA_BLOB mac_key;
uint32 send_seq_num;
- struct trans_info_context *trans_info;
struct outstanding_packet_lookup *outstanding_packet_list;
};
{
unsigned char calc_md5_mac[16];
struct smb_basic_signing_context *data = si->signing_context;
- uint32 send_seq_num;
if (!si->doing_signing)
return;
/* mark the packet as signed - BEFORE we sign it...*/
mark_packet_signed(outbuf);
- if (data->trans_info)
- send_seq_num = data->trans_info->send_seq_num;
- else
- send_seq_num = data->send_seq_num;
-
- simple_packet_signature(data, (const unsigned char *)outbuf, send_seq_num, calc_md5_mac);
+ simple_packet_signature(data, (const unsigned char *)outbuf,
+ data->send_seq_num, calc_md5_mac);
DEBUG(10, ("client_sign_outgoing_message: sent SMB signature of\n"));
dump_data(10, (const char *)calc_md5_mac, 8);
/* cli->outbuf[smb_ss_field+2]=0;
Uncomment this to test if the remote server actually verifies signatures...*/
- if (data->trans_info)
- return;
-
- data->send_seq_num++;
- store_sequence_for_reply(&data->outstanding_packet_list,
- SVAL(outbuf,smb_mid), data->send_seq_num);
- data->send_seq_num++;
+ data->send_seq_num += 2;
}
/***********************************************************
{
BOOL good;
uint32 reply_seq_number;
- uint32 saved_seq;
unsigned char calc_md5_mac[16];
unsigned char *server_sent_mac;
return False;
}
- if (data->trans_info) {
- reply_seq_number = data->trans_info->reply_seq_num;
- } else if (!get_sequence_for_reply(&data->outstanding_packet_list,
- SVAL(inbuf, smb_mid), &reply_seq_number)) {
- DEBUG(1, ("client_check_incoming_message: failed to get sequence number %u for reply.\n",
- (unsigned int) SVAL(inbuf, smb_mid) ));
- return False;
- }
-
- saved_seq = reply_seq_number;
- simple_packet_signature(data, (const unsigned char *)inbuf, reply_seq_number, calc_md5_mac);
+ reply_seq_number = data->send_seq_num - 1;
+ simple_packet_signature(data, (const unsigned char *)inbuf,
+ reply_seq_number, calc_md5_mac);
server_sent_mac = (unsigned char *)&inbuf[smb_ss_field];
good = (memcmp(server_sent_mac, calc_md5_mac, 8) == 0);
#if 1 /* JRATEST */
{
int i;
- reply_seq_number -= 5;
- for (i = 0; i < 10; i++, reply_seq_number++) {
- simple_packet_signature(data, (const unsigned char *)inbuf, reply_seq_number, calc_md5_mac);
+ for (i = -5; i < 5; i++) {
+ simple_packet_signature(data, (const unsigned char *)inbuf, reply_seq_number+i, calc_md5_mac);
if (memcmp(server_sent_mac, calc_md5_mac, 8) == 0) {
DEBUG(0,("client_check_incoming_message: out of seq. seq num %u matches. \
-We were expecting seq %u\n", reply_seq_number, saved_seq ));
+We were expecting seq %u\n", reply_seq_number+i, reply_seq_number ));
break;
}
}
DEBUG(10, ("client_check_incoming_message: seq %u: got good SMB signature of\n", (unsigned int)reply_seq_number));
dump_data(10, (const char *)server_sent_mac, 8);
}
- return signing_good(inbuf, si, good, saved_seq, must_be_ok);
+ return signing_good(inbuf, si, good, reply_seq_number, must_be_ok);
}
/***********************************************************
data_blob_free(&data->mac_key);
- if (data->trans_info) {
- SAFE_FREE(data->trans_info);
- }
-
SAFE_FREE(si->signing_context);
return;
return True;
}
-/***********************************************************
- Tell client code we are in a multiple trans reply state.
- We call this after the last outgoing trans2 packet (which
- has incremented the sequence numbers), so we must save the
- current mid and sequence number -2.
-************************************************************/
-
-void cli_signing_trans_start(struct cli_state *cli, uint16 mid)
-{
- struct smb_basic_signing_context *data = cli->sign_info.signing_context;
- uint32 reply_seq_num;
-
- if (!cli->sign_info.doing_signing || !data)
- return;
-
- data->trans_info = SMB_XMALLOC_P(struct trans_info_context);
- ZERO_STRUCTP(data->trans_info);
-
- /* This ensures the sequence is pulled off the outstanding packet list */
- if (!get_sequence_for_reply(&data->outstanding_packet_list,
- mid, &reply_seq_num)) {
- DEBUG(1, ("get_sequence_for_reply failed - did we enter the trans signing state without sending a packet?\n"));
- return;
- }
-
- data->trans_info->send_seq_num = reply_seq_num - 1;
- data->trans_info->mid = mid;
- data->trans_info->reply_seq_num = reply_seq_num;
-
- DEBUG(10,("cli_signing_trans_start: storing mid = %u, reply_seq_num = %u, send_seq_num = %u \
-data->send_seq_num = %u\n",
- (unsigned int)data->trans_info->mid,
- (unsigned int)data->trans_info->reply_seq_num,
- (unsigned int)data->trans_info->send_seq_num,
- (unsigned int)data->send_seq_num ));
-}
-
-/***********************************************************
- Tell client code we are out of a multiple trans reply state.
-************************************************************/
-
-void cli_signing_trans_stop(struct cli_state *cli)
-{
- struct smb_basic_signing_context *data = cli->sign_info.signing_context;
-
- if (!cli->sign_info.doing_signing || !data)
- return;
-
- DEBUG(10,("cli_signing_trans_stop: freeing mid = %u, reply_seq_num = %u, send_seq_num = %u \
-data->send_seq_num = %u\n",
- (unsigned int)data->trans_info->mid,
- (unsigned int)data->trans_info->reply_seq_num,
- (unsigned int)data->trans_info->send_seq_num,
- (unsigned int)data->send_seq_num ));
-
- SAFE_FREE(data->trans_info);
- data->trans_info = NULL;
-}
-
/***********************************************************
SMB signing - TEMP implementation - calculate a MAC to send.
************************************************************/
{
unsigned char calc_md5_mac[16];
struct smb_basic_signing_context *data = si->signing_context;
- uint32 send_seq_number = data->send_seq_num;
- BOOL was_deferred_packet = False;
+ uint32 send_seq_number = data->send_seq_num-1;
uint16 mid;
if (!si->doing_signing) {
mid = SVAL(outbuf, smb_mid);
/* See if this is a reply for a deferred packet. */
- was_deferred_packet = get_sequence_for_reply(&data->outstanding_packet_list, mid, &send_seq_number);
-
- if (data->trans_info && (data->trans_info->mid == mid)) {
- /* This is a reply in a trans stream. Use the sequence
- * number associated with the stream mid. */
- send_seq_number = data->trans_info->send_seq_num;
- }
+ get_sequence_for_reply(&data->outstanding_packet_list, mid, &send_seq_number);
simple_packet_signature(data, (const unsigned char *)outbuf, send_seq_number, calc_md5_mac);
/* cli->outbuf[smb_ss_field+2]=0;
Uncomment this to test if the remote client actually verifies signatures...*/
-
- /* Don't mess with the sequence number for a deferred packet. */
- if (was_deferred_packet) {
- return;
- }
-
- if (!data->trans_info) {
- /* Always increment if not in a trans stream. */
- data->send_seq_num++;
- } else if ((data->trans_info->send_seq_num == data->send_seq_num) || (data->trans_info->mid != mid)) {
- /* Increment if this is the first reply in a trans stream or a
- * packet that doesn't belong to this stream (different mid). */
- data->send_seq_num++;
- }
-}
-
-/***********************************************************
- Is an incoming packet an oplock break reply ?
-************************************************************/
-
-static BOOL is_oplock_break(char *inbuf)
-{
- if (CVAL(inbuf,smb_com) != SMBlockingX)
- return False;
-
- if (!(CVAL(inbuf,smb_vwv3) & LOCKING_ANDX_OPLOCK_RELEASE))
- return False;
-
- DEBUG(10,("is_oplock_break: Packet is oplock break\n"));
- return True;
}
/***********************************************************
mid = SVAL(inbuf, smb_mid);
- /* Is this part of a trans stream ? */
- if (data->trans_info && (data->trans_info->mid == mid)) {
- /* If so we don't increment the sequence. */
- reply_seq_number = data->trans_info->reply_seq_num;
- } else {
- /* We always increment the sequence number. */
- data->send_seq_num++;
-
- /* If we get an asynchronous oplock break reply and there
- * isn't a reply pending we need to re-sync the sequence
- * number.
- */
- if (is_oplock_break(inbuf)) {
- DEBUG(10,("srv_check_incoming_message: oplock break at seq num %u\n", data->send_seq_num));
- data->send_seq_num++;
- }
- }
+ /* We always increment the sequence number. */
+ data->send_seq_num += 2;
saved_seq = reply_seq_number;
simple_packet_signature(data, (const unsigned char *)inbuf, reply_seq_number, calc_md5_mac);
* Ensure we only store this mid reply once...
*/
- if (store_sequence_for_reply(&data->outstanding_packet_list, mid, data->send_seq_num)) {
- data->send_seq_num++;
- }
+ store_sequence_for_reply(&data->outstanding_packet_list, mid,
+ data->send_seq_num-1);
}
/***********************************************************
return True;
}
-
-/***********************************************************
- Tell server code we are in a multiple trans reply state.
-************************************************************/
-
-void srv_signing_trans_start(uint16 mid)
-{
- struct smb_basic_signing_context *data;
-
- if (!srv_sign_info.doing_signing)
- return;
-
- data = (struct smb_basic_signing_context *)srv_sign_info.signing_context;
- if (!data)
- return;
-
- data->trans_info = SMB_XMALLOC_P(struct trans_info_context);
- ZERO_STRUCTP(data->trans_info);
-
- data->trans_info->reply_seq_num = data->send_seq_num-1;
- data->trans_info->mid = mid;
- data->trans_info->send_seq_num = data->send_seq_num;
-
- DEBUG(10,("srv_signing_trans_start: storing mid = %u, reply_seq_num = %u, send_seq_num = %u \
-data->send_seq_num = %u\n",
- (unsigned int)mid,
- (unsigned int)data->trans_info->reply_seq_num,
- (unsigned int)data->trans_info->send_seq_num,
- (unsigned int)data->send_seq_num ));
-}
-
-/***********************************************************
- Tell server code we are out of a multiple trans reply state.
-************************************************************/
-
-void srv_signing_trans_stop(void)
-{
- struct smb_basic_signing_context *data;
-
- if (!srv_sign_info.doing_signing)
- return;
-
- data = (struct smb_basic_signing_context *)srv_sign_info.signing_context;
- if (!data || !data->trans_info)
- return;
-
- DEBUG(10,("srv_signing_trans_stop: removing mid = %u, reply_seq_num = %u, send_seq_num = %u \
-data->send_seq_num = %u\n",
- (unsigned int)data->trans_info->mid,
- (unsigned int)data->trans_info->reply_seq_num,
- (unsigned int)data->trans_info->send_seq_num,
- (unsigned int)data->send_seq_num ));
-
- SAFE_FREE(data->trans_info);
- data->trans_info = NULL;
-}
-
/***********************************************************
Turn on signing from this packet onwards.
************************************************************/
git.samba.org / ira / wip.git / blobdiff