Unix SMB/CIFS implementation.
negprot reply code
Copyright (C) Andrew Tridgell 1992-1998
+ Copyright (C) Volker Lendecke 2007
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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
extern enum protocol_types Protocol;
extern int max_recv;
-BOOL global_encrypted_passwords_negotiated = False;
-BOOL global_spnego_negotiated = False;
+bool global_encrypted_passwords_negotiated = False;
+bool global_spnego_negotiated = False;
struct auth_context *negprot_global_auth_context = NULL;
-static void get_challenge(char buff[8])
+static void get_challenge(uint8 buff[8])
{
NTSTATUS nt_status;
const uint8 *cryptkey;
DEBUG(10, ("get challenge: creating negprot_global_auth_context\n"));
if (!NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&negprot_global_auth_context))) {
DEBUG(0, ("make_auth_context_subsystem returned %s", nt_errstr(nt_status)));
- smb_panic("cannot make_negprot_global_auth_context!\n");
+ smb_panic("cannot make_negprot_global_auth_context!");
}
DEBUG(10, ("get challenge: getting challenge\n"));
cryptkey = negprot_global_auth_context->get_ntlm_challenge(negprot_global_auth_context);
Reply for the core protocol.
****************************************************************************/
-static int reply_corep(char *inbuf, char *outbuf)
+static void reply_corep(struct smb_request *req, uint16 choice)
{
- int outsize = set_message(inbuf,outbuf,1,0,True);
+ reply_outbuf(req, 1, 0);
+ SSVAL(req->outbuf, smb_vwv0, choice);
Protocol = PROTOCOL_CORE;
-
- return outsize;
}
/****************************************************************************
Reply for the coreplus protocol.
****************************************************************************/
-static int reply_coreplus(char *inbuf, char *outbuf)
+static void reply_coreplus(struct smb_request *req, uint16 choice)
{
int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
- int outsize = set_message(inbuf,outbuf,13,0,True);
- SSVAL(outbuf,smb_vwv5,raw); /* tell redirector we support
+
+ reply_outbuf(req, 13, 0);
+
+ SSVAL(req->outbuf,smb_vwv0,choice);
+ SSVAL(req->outbuf,smb_vwv5,raw); /* tell redirector we support
readbraw and writebraw (possibly) */
/* Reply, SMBlockread, SMBwritelock supported. */
- SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
- SSVAL(outbuf,smb_vwv1,0x1); /* user level security, don't encrypt */
-
+ SCVAL(req->outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
+ SSVAL(req->outbuf,smb_vwv1,0x1); /* user level security, don't
+ * encrypt */
Protocol = PROTOCOL_COREPLUS;
-
- return outsize;
}
/****************************************************************************
Reply for the lanman 1.0 protocol.
****************************************************************************/
-static int reply_lanman1(char *inbuf, char *outbuf)
+static void reply_lanman1(struct smb_request *req, uint16 choice)
{
int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
int secword=0;
if (global_encrypted_passwords_negotiated)
secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
- set_message(inbuf,outbuf,13,global_encrypted_passwords_negotiated?8:0,True);
- SSVAL(outbuf,smb_vwv1,secword);
+ reply_outbuf(req, 13, global_encrypted_passwords_negotiated?8:0);
+
+ SSVAL(req->outbuf,smb_vwv0,choice);
+ SSVAL(req->outbuf,smb_vwv1,secword);
/* Create a token value and add it to the outgoing packet. */
if (global_encrypted_passwords_negotiated) {
- get_challenge(smb_buf(outbuf));
- SSVAL(outbuf,smb_vwv11, 8);
+ get_challenge((uint8 *)smb_buf(req->outbuf));
+ SSVAL(req->outbuf,smb_vwv11, 8);
}
Protocol = PROTOCOL_LANMAN1;
/* Reply, SMBlockread, SMBwritelock supported. */
- SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
- SSVAL(outbuf,smb_vwv2,max_recv);
- SSVAL(outbuf,smb_vwv3,lp_maxmux()); /* maxmux */
- SSVAL(outbuf,smb_vwv4,1);
- SSVAL(outbuf,smb_vwv5,raw); /* tell redirector we support
+ SCVAL(req->outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
+ SSVAL(req->outbuf,smb_vwv2,max_recv);
+ SSVAL(req->outbuf,smb_vwv3,lp_maxmux()); /* maxmux */
+ SSVAL(req->outbuf,smb_vwv4,1);
+ SSVAL(req->outbuf,smb_vwv5,raw); /* tell redirector we support
readbraw writebraw (possibly) */
- SIVAL(outbuf,smb_vwv6,sys_getpid());
- SSVAL(outbuf,smb_vwv10, set_server_zone_offset(t)/60);
+ SIVAL(req->outbuf,smb_vwv6,sys_getpid());
+ SSVAL(req->outbuf,smb_vwv10, set_server_zone_offset(t)/60);
- srv_put_dos_date(outbuf,smb_vwv8,t);
+ srv_put_dos_date((char *)req->outbuf,smb_vwv8,t);
- return (smb_len(outbuf)+4);
+ return;
}
/****************************************************************************
Reply for the lanman 2.0 protocol.
****************************************************************************/
-static int reply_lanman2(char *inbuf, char *outbuf)
+static void reply_lanman2(struct smb_request *req, uint16 choice)
{
int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
int secword=0;
if (global_encrypted_passwords_negotiated)
secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
- set_message(inbuf,outbuf,13,global_encrypted_passwords_negotiated?8:0,True);
- SSVAL(outbuf,smb_vwv1,secword);
- SIVAL(outbuf,smb_vwv6,sys_getpid());
+ reply_outbuf(req, 13, global_encrypted_passwords_negotiated?8:0);
+
+ SSVAL(req->outbuf,smb_vwv0,choice);
+ SSVAL(req->outbuf,smb_vwv1,secword);
+ SIVAL(req->outbuf,smb_vwv6,sys_getpid());
/* Create a token value and add it to the outgoing packet. */
if (global_encrypted_passwords_negotiated) {
- get_challenge(smb_buf(outbuf));
- SSVAL(outbuf,smb_vwv11, 8);
+ get_challenge((uint8 *)smb_buf(req->outbuf));
+ SSVAL(req->outbuf,smb_vwv11, 8);
}
Protocol = PROTOCOL_LANMAN2;
/* Reply, SMBlockread, SMBwritelock supported. */
- SCVAL(outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
- SSVAL(outbuf,smb_vwv2,max_recv);
- SSVAL(outbuf,smb_vwv3,lp_maxmux());
- SSVAL(outbuf,smb_vwv4,1);
- SSVAL(outbuf,smb_vwv5,raw); /* readbraw and/or writebraw */
- SSVAL(outbuf,smb_vwv10, set_server_zone_offset(t)/60);
- srv_put_dos_date(outbuf,smb_vwv8,t);
-
- return (smb_len(outbuf)+4);
+ SCVAL(req->outbuf,smb_flg,FLAG_REPLY|FLAG_SUPPORT_LOCKREAD);
+ SSVAL(req->outbuf,smb_vwv2,max_recv);
+ SSVAL(req->outbuf,smb_vwv3,lp_maxmux());
+ SSVAL(req->outbuf,smb_vwv4,1);
+ SSVAL(req->outbuf,smb_vwv5,raw); /* readbraw and/or writebraw */
+ SSVAL(req->outbuf,smb_vwv10, set_server_zone_offset(t)/60);
+ srv_put_dos_date((char *)req->outbuf,smb_vwv8,t);
}
/****************************************************************************
char *host_princ_s = NULL;
name_to_fqdn(myname, global_myname());
strlower_m(myname);
- asprintf(&host_princ_s, "cifs/%s@%s", myname, lp_realm());
- if (host_princ_s == NULL) {
- blob = data_blob(NULL, 0);
- return blob;
+ if (asprintf(&host_princ_s, "cifs/%s@%s", myname, lp_realm())
+ == -1) {
+ return data_blob_null;
}
blob = spnego_gen_negTokenInit(guid, OIDs_krb5, host_princ_s);
SAFE_FREE(host_princ_s);
Reply for the nt protocol.
****************************************************************************/
-static int reply_nt1(char *inbuf, char *outbuf)
+static void reply_nt1(struct smb_request *req, uint16 choice)
{
/* dual names + lock_and_read + nt SMBs + remote API calls */
int capabilities = CAP_NT_FIND|CAP_LOCK_AND_READ|
int secword=0;
char *p, *q;
- BOOL negotiate_spnego = False;
+ bool negotiate_spnego = False;
time_t t = time(NULL);
+ ssize_t ret;
global_encrypted_passwords_negotiated = lp_encrypted_passwords();
WinXP sets it and Vista does not. But we have to
distinguish from NT which doesn't set it either. */
- if ( (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY) &&
- ((SVAL(inbuf, smb_flg2) & FLAGS2_UNKNOWN_BIT4) == 0) )
+ if ( (req->flags2 & FLAGS2_EXTENDED_SECURITY) &&
+ ((req->flags2 & FLAGS2_UNKNOWN_BIT4) == 0) )
{
if (get_remote_arch() != RA_SAMBA) {
set_remote_arch( RA_VISTA );
}
}
+ reply_outbuf(req,17,0);
+
/* do spnego in user level security if the client
supports it and we can do encrypted passwords */
if (global_encrypted_passwords_negotiated &&
(lp_security() != SEC_SHARE) &&
lp_use_spnego() &&
- (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY)) {
+ (req->flags2 & FLAGS2_EXTENDED_SECURITY)) {
negotiate_spnego = True;
capabilities |= CAP_EXTENDED_SECURITY;
add_to_common_flags2(FLAGS2_EXTENDED_SECURITY);
- /* Ensure FLAGS2_EXTENDED_SECURITY gets set in this reply (already
- partially constructed. */
- SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2) | FLAGS2_EXTENDED_SECURITY);
+ /* Ensure FLAGS2_EXTENDED_SECURITY gets set in this reply
+ (already partially constructed. */
+ SSVAL(req->outbuf, smb_flg2,
+ req->flags2 | FLAGS2_EXTENDED_SECURITY);
}
capabilities |= CAP_NT_SMBS|CAP_RPC_REMOTE_APIS|CAP_UNICODE;
}
}
- set_message(inbuf,outbuf,17,0,True);
-
- SCVAL(outbuf,smb_vwv1,secword);
+ SSVAL(req->outbuf,smb_vwv0,choice);
+ SCVAL(req->outbuf,smb_vwv1,secword);
Protocol = PROTOCOL_NT1;
- SSVAL(outbuf,smb_vwv1+1,lp_maxmux()); /* maxmpx */
- SSVAL(outbuf,smb_vwv2+1,1); /* num vcs */
- SIVAL(outbuf,smb_vwv3+1,max_recv); /* max buffer. LOTS! */
- SIVAL(outbuf,smb_vwv5+1,0x10000); /* raw size. full 64k */
- SIVAL(outbuf,smb_vwv7+1,sys_getpid()); /* session key */
- SIVAL(outbuf,smb_vwv9+1,capabilities); /* capabilities */
- put_long_date(outbuf+smb_vwv11+1,t);
- SSVALS(outbuf,smb_vwv15+1,set_server_zone_offset(t)/60);
+ SSVAL(req->outbuf,smb_vwv1+1,lp_maxmux()); /* maxmpx */
+ SSVAL(req->outbuf,smb_vwv2+1,1); /* num vcs */
+ SIVAL(req->outbuf,smb_vwv3+1,max_recv); /* max buffer. LOTS! */
+ SIVAL(req->outbuf,smb_vwv5+1,0x10000); /* raw size. full 64k */
+ SIVAL(req->outbuf,smb_vwv7+1,sys_getpid()); /* session key */
+ SIVAL(req->outbuf,smb_vwv9+1,capabilities); /* capabilities */
+ put_long_date((char *)req->outbuf+smb_vwv11+1,t);
+ SSVALS(req->outbuf,smb_vwv15+1,set_server_zone_offset(t)/60);
- p = q = smb_buf(outbuf);
+ p = q = smb_buf(req->outbuf);
if (!negotiate_spnego) {
/* Create a token value and add it to the outgoing packet. */
if (global_encrypted_passwords_negotiated) {
+ uint8 chal[8];
/* note that we do not send a challenge at all if
we are using plaintext */
- get_challenge(p);
- SCVAL(outbuf,smb_vwv16+1,8);
- p += 8;
+ get_challenge(chal);
+ ret = message_push_blob(
+ &req->outbuf, data_blob_const(chal, sizeof(chal)));
+ if (ret == -1) {
+ DEBUG(0, ("Could not push challenge\n"));
+ reply_nterror(req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+ SCVAL(req->outbuf, smb_vwv16+1, ret);
+ p += ret;
+ }
+ ret = message_push_string(&req->outbuf, lp_workgroup(),
+ STR_UNICODE|STR_TERMINATE
+ |STR_NOALIGN);
+ if (ret == -1) {
+ DEBUG(0, ("Could not push challenge\n"));
+ reply_nterror(req, NT_STATUS_NO_MEMORY);
+ return;
}
- p += srvstr_push(outbuf, p, lp_workgroup(), -1,
- STR_UNICODE|STR_TERMINATE|STR_NOALIGN);
DEBUG(3,("not using SPNEGO\n"));
} else {
DATA_BLOB spnego_blob = negprot_spnego();
if (spnego_blob.data == NULL) {
- return ERROR_NT(NT_STATUS_NO_MEMORY);
+ reply_nterror(req, NT_STATUS_NO_MEMORY);
+ return;
}
- memcpy(p, spnego_blob.data, spnego_blob.length);
- p += spnego_blob.length;
+ ret = message_push_blob(&req->outbuf, spnego_blob);
+ if (ret == -1) {
+ DEBUG(0, ("Could not push spnego blob\n"));
+ reply_nterror(req, NT_STATUS_NO_MEMORY);
+ return;
+ }
+ p += ret;
data_blob_free(&spnego_blob);
- SCVAL(outbuf,smb_vwv16+1, 0);
+ SCVAL(req->outbuf,smb_vwv16+1, 0);
DEBUG(3,("using SPNEGO\n"));
}
- SSVAL(outbuf,smb_vwv17, p - q); /* length of challenge+domain strings */
- set_message_end(inbuf,outbuf, p);
-
- return (smb_len(outbuf)+4);
+ SSVAL(req->outbuf,smb_vwv17, p - q); /* length of challenge+domain
+ * strings */
+
+ return;
}
/* these are the protocol lists used for auto architecture detection:
static const struct {
const char *proto_name;
const char *short_name;
- int (*proto_reply_fn)(char *, char *);
+ void (*proto_reply_fn)(struct smb_request *req, uint16 choice);
int protocol_level;
} supported_protocols[] = {
{"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1},
conn POINTER CAN BE NULL HERE !
****************************************************************************/
-int reply_negprot(connection_struct *conn,
- char *inbuf,char *outbuf, int dum_size,
- int dum_buffsize)
+void reply_negprot(struct smb_request *req)
{
- int outsize = set_message(inbuf,outbuf,1,0,True);
- int Index=0;
+ size_t size = smb_len(req->inbuf) + 4;
int choice= -1;
int protocol;
char *p;
- int bcc = SVAL(smb_buf(inbuf),-2);
+ int bcc = SVAL(smb_buf(req->inbuf),-2);
int arch = ARCH_ALL;
+ int num_cliprotos;
+ char **cliprotos;
+ int i;
- static BOOL done_negprot = False;
+ static bool done_negprot = False;
START_PROFILE(SMBnegprot);
}
done_negprot = True;
- p = smb_buf(inbuf)+1;
- while (p < (smb_buf(inbuf) + bcc)) {
- Index++;
- DEBUG(3,("Requested protocol [%s]\n",p));
- if (strcsequal(p,"Windows for Workgroups 3.1a"))
- arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K );
- else if (strcsequal(p,"DOS LM1.2X002"))
+ if (req->inbuf[size-1] != '\0') {
+ DEBUG(0, ("negprot protocols not 0-terminated\n"));
+ reply_nterror(req, NT_STATUS_INVALID_PARAMETER);
+ END_PROFILE(SMBnegprot);
+ return;
+ }
+
+ p = smb_buf(req->inbuf) + 1;
+
+ num_cliprotos = 0;
+ cliprotos = NULL;
+
+ while (p < (smb_buf(req->inbuf) + bcc)) {
+
+ char **tmp;
+
+ tmp = TALLOC_REALLOC_ARRAY(talloc_tos(), cliprotos, char *,
+ num_cliprotos+1);
+ if (tmp == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ TALLOC_FREE(cliprotos);
+ reply_nterror(req, NT_STATUS_NO_MEMORY);
+ END_PROFILE(SMBnegprot);
+ return;
+ }
+
+ cliprotos = tmp;
+
+ if (pull_ascii_talloc(cliprotos, &cliprotos[num_cliprotos], p)
+ == (size_t)-1) {
+ DEBUG(0, ("pull_ascii_talloc failed\n"));
+ TALLOC_FREE(cliprotos);
+ reply_nterror(req, NT_STATUS_NO_MEMORY);
+ END_PROFILE(SMBnegprot);
+ return;
+ }
+
+ DEBUG(3, ("Requested protocol [%s]\n",
+ cliprotos[num_cliprotos]));
+
+ num_cliprotos += 1;
+ p += strlen(p) + 2;
+ }
+
+ for (i=0; i<num_cliprotos; i++) {
+ if (strcsequal(cliprotos[i], "Windows for Workgroups 3.1a"))
+ arch &= ( ARCH_WFWG | ARCH_WIN95 | ARCH_WINNT
+ | ARCH_WIN2K );
+ else if (strcsequal(cliprotos[i], "DOS LM1.2X002"))
arch &= ( ARCH_WFWG | ARCH_WIN95 );
- else if (strcsequal(p,"DOS LANMAN2.1"))
+ else if (strcsequal(cliprotos[i], "DOS LANMAN2.1"))
arch &= ( ARCH_WFWG | ARCH_WIN95 );
- else if (strcsequal(p,"NT LM 0.12"))
- arch &= ( ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K | ARCH_CIFSFS);
- else if (strcsequal(p,"SMB 2.001"))
+ else if (strcsequal(cliprotos[i], "NT LM 0.12"))
+ arch &= ( ARCH_WIN95 | ARCH_WINNT | ARCH_WIN2K
+ | ARCH_CIFSFS);
+ else if (strcsequal(cliprotos[i], "SMB 2.001"))
arch = ARCH_VISTA;
- else if (strcsequal(p,"LANMAN2.1"))
+ else if (strcsequal(cliprotos[i], "LANMAN2.1"))
arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
- else if (strcsequal(p,"LM1.2X002"))
+ else if (strcsequal(cliprotos[i], "LM1.2X002"))
arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
- else if (strcsequal(p,"MICROSOFT NETWORKS 1.03"))
+ else if (strcsequal(cliprotos[i], "MICROSOFT NETWORKS 1.03"))
arch &= ARCH_WINNT;
- else if (strcsequal(p,"XENIX CORE"))
+ else if (strcsequal(cliprotos[i], "XENIX CORE"))
arch &= ( ARCH_WINNT | ARCH_OS2 );
- else if (strcsequal(p,"Samba")) {
+ else if (strcsequal(cliprotos[i], "Samba")) {
arch = ARCH_SAMBA;
break;
- } else if (strcsequal(p,"POSIX 2")) {
+ } else if (strcsequal(cliprotos[i], "POSIX 2")) {
arch = ARCH_CIFSFS;
break;
}
-
- p += strlen(p) + 2;
}
/* CIFSFS can send one arch only, NT LM 0.12. */
- if (Index == 1 && (arch & ARCH_CIFSFS)) {
+ if (i == 1 && (arch & ARCH_CIFSFS)) {
arch = ARCH_CIFSFS;
}
set_remote_arch(RA_WIN95);
break;
case ARCH_WINNT:
- if(SVAL(inbuf,smb_flg2)==FLAGS2_WIN2K_SIGNATURE)
+ if(req->flags2 == FLAGS2_WIN2K_SIGNATURE)
set_remote_arch(RA_WIN2K);
else
set_remote_arch(RA_WINNT);
when the client connects to port 445. Of course there is a small
window where we are listening to messages -- jerry */
- claim_connection(NULL,"",0,True,FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_PRINT_GENERAL);
+ claim_connection(
+ NULL,"",FLAG_MSG_GENERAL|FLAG_MSG_SMBD|FLAG_MSG_PRINT_GENERAL);
/* Check for protocols, most desirable first */
for (protocol = 0; supported_protocols[protocol].proto_name; protocol++) {
- p = smb_buf(inbuf)+1;
- Index = 0;
+ i = 0;
if ((supported_protocols[protocol].protocol_level <= lp_maxprotocol()) &&
(supported_protocols[protocol].protocol_level >= lp_minprotocol()))
- while (p < (smb_buf(inbuf) + bcc)) {
- if (strequal(p,supported_protocols[protocol].proto_name))
- choice = Index;
- Index++;
- p += strlen(p) + 2;
+ while (i < num_cliprotos) {
+ if (strequal(cliprotos[i],supported_protocols[protocol].proto_name))
+ choice = i;
+ i++;
}
if(choice != -1)
break;
}
- SSVAL(outbuf,smb_vwv0,choice);
if(choice != -1) {
fstrcpy(remote_proto,supported_protocols[protocol].short_name);
reload_services(True);
- outsize = supported_protocols[protocol].proto_reply_fn(inbuf, outbuf);
+ supported_protocols[protocol].proto_reply_fn(req, choice);
DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name));
} else {
DEBUG(0,("No protocol supported !\n"));
+ reply_outbuf(req, 1, 0);
+ SSVAL(req->outbuf, smb_vwv0, choice);
}
- SSVAL(outbuf,smb_vwv0,choice);
DEBUG( 5, ( "negprot index=%d\n", choice ) );
"client negotiated a downlevel protocol");
}
+ TALLOC_FREE(cliprotos);
END_PROFILE(SMBnegprot);
- return(outsize);
+ return;
}