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Add the capability to set "smb encrypt = required"

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on a share (or global) and have the server reply with
ACCESS_DENIED for all non-encrypted traffic (except
that used to query encryption requirements and set
encryption state).
Jeremy.
(This used to be commit d241bfa577)
This commit is contained in:
Jeremy Allison 2007-12-27 23:51:03 -08:00
parent 33f01360e0
commit afce2b245a
5 changed files with 60 additions and 3 deletions
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17
source3/client/client.c
View File

@ -2466,17 +2466,30 @@ static int cmd_posix(void)
return 1;
}
}
if (caplow & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP) {
caps = talloc_asprintf_append(caps, "posix_encrypt ");
if (!caps) {
return 1;
}
}
if (caplow & CIFS_UNIX_TRANSPORT_ENCRYPTION_MANDATORY_CAP) {
caps = talloc_asprintf_append(caps, "mandatory_posix_encrypt ");
if (!caps) {
return 1;
}
}
if (*caps && caps[strlen(caps)-1] == ' ') {
caps[strlen(caps)-1] = '\0';
}
d_printf("Server supports CIFS capabilities %s\n", caps);
if (!cli_set_unix_extensions_capabilities(cli, major, minor, caplow, caphigh)) {
d_printf("Can't set UNIX CIFS extensions capabilities. %s.\n", cli_errstr(cli));
return 1;
}
d_printf("Selecting server supported CIFS capabilities %s\n", caps);
if (caplow & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
CLI_DIRSEP_CHAR = '/';
*CLI_DIRSEP_STR = '/';

1
source3/include/smb.h
View File

@ -658,6 +658,7 @@ typedef struct connection_struct {
bool used;
int num_files_open;
unsigned int num_smb_operations; /* Count of smb operations on this tree. */
int encrypt_level;
/* Semantics requested by the client or forced by the server config. */
bool case_sensitive;

10
source3/smbd/process.c
View File

@ -1457,6 +1457,16 @@ static void switch_message(uint8 type, struct smb_request *req, int size)
reply_doserror(req, ERRSRV, ERRaccess);
return;
}
if (conn->encrypt_level == Required && SVAL(req->inbuf,4) != 0x45FF ) {
/* An encrypted packet has 0xFF 'E' at offset 4
* which is little endian 0x45FF */
uint8 com = CVAL(req->inbuf,smb_com);
if (com != SMBtrans2 && com != SMBtranss2) {
reply_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
}
conn->num_smb_operations++;
}

2
source3/smbd/service.c
View File

@ -795,6 +795,8 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
conn->case_preserve = lp_preservecase(snum);
conn->short_case_preserve = lp_shortpreservecase(snum);
conn->encrypt_level = lp_smb_encrypt(snum);
conn->veto_list = NULL;
conn->hide_list = NULL;
conn->veto_oplock_list = NULL;

33
source3/smbd/trans2.c
View File

@ -2430,6 +2430,16 @@ static void call_trans2qfsinfo(connection_struct *conn,
info_level = SVAL(params,0);
if (conn->encrypt_level == Required && SVAL(req->inbuf,4) != 0x45FF ) {
if (info_level != SMB_QUERY_CIFS_UNIX_INFO) {
DEBUG(0,("call_trans2qfsinfo: encryption required "
"and info level 0x%x sent.\n",
(unsigned int)info_level));
reply_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
}
DEBUG(3,("call_trans2qfsinfo: level = %d\n", info_level));
if(SMB_VFS_STAT(conn,".",&st)!=0) {
@ -2736,7 +2746,7 @@ cBytesSector=%u, cUnitTotal=%u, cUnitAvail=%d\n", (unsigned int)bsize, (unsigned
return;
}
switch (lp_smb_encrypt(SNUM(conn))) {
switch (conn->encrypt_level) {
case 0:
encrypt_caps = 0;
break;
@ -2968,6 +2978,16 @@ static void call_trans2setfsinfo(connection_struct *conn,
info_level = SVAL(params,2);
if (conn->encrypt_level == Required && SVAL(req->inbuf,4) != 0x45FF ) {
if (info_level != SMB_REQUEST_TRANSPORT_ENCRYPTION) {
DEBUG(0,("call_trans2setfsinfo: encryption required "
"and info level 0x%x sent.\n",
(unsigned int)info_level));
reply_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
}
switch(info_level) {
case SMB_SET_CIFS_UNIX_INFO:
{
@ -7060,6 +7080,17 @@ static void handle_trans2(connection_struct *conn, struct smb_request *req,
SSVAL(req->inbuf,smb_flg2,req->flags2);
}
if (conn->encrypt_level == Required && SVAL(req->inbuf,4) != 0x45FF ) {
if (state->call != TRANSACT2_QFSINFO &&
state->call != TRANSACT2_SETFSINFO) {
DEBUG(0,("handle_trans2: encryption required "
"with call 0x%x\n",
(unsigned int)state->call));
reply_nterror(req, NT_STATUS_ACCESS_DENIED);
return;
}
}
/* Now we must call the relevant TRANS2 function */
switch(state->call) {
case TRANSACT2_OPEN: