--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ negprot reply code
+ Copyright (C) Andrew Tridgell 1992-1998
+
+ 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
+ (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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+
+extern fstring remote_proto;
+extern enum protocol_types Protocol;
+extern int max_recv;
+
+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])
+{
+ NTSTATUS nt_status;
+ const uint8 *cryptkey;
+
+ /* We might be called more than once, muliple negprots are premitted */
+ if (negprot_global_auth_context) {
+ DEBUG(3, ("get challenge: is this a secondary negprot? negprot_global_auth_context is non-NULL!\n"));
+ (negprot_global_auth_context->free)(&negprot_global_auth_context);
+ }
+
+ 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");
+ }
+ DEBUG(10, ("get challenge: getting challenge\n"));
+ cryptkey = negprot_global_auth_context->get_ntlm_challenge(negprot_global_auth_context);
+ memcpy(buff, cryptkey, 8);
+}
+
+/****************************************************************************
+ Reply for the core protocol.
+****************************************************************************/
+
+static int reply_corep(char *inbuf, char *outbuf)
+{
+ int outsize = set_message(outbuf,1,0,True);
+
+ Protocol = PROTOCOL_CORE;
+
+ return outsize;
+}
+
+/****************************************************************************
+ Reply for the coreplus protocol.
+****************************************************************************/
+
+static int reply_coreplus(char *inbuf, char *outbuf)
+{
+ int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
+ int outsize = set_message(outbuf,13,0,True);
+ SSVAL(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 */
+
+ Protocol = PROTOCOL_COREPLUS;
+
+ return outsize;
+}
+
+/****************************************************************************
+ Reply for the lanman 1.0 protocol.
+****************************************************************************/
+
+static int reply_lanman1(char *inbuf, char *outbuf)
+{
+ int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
+ int secword=0;
+ time_t t = time(NULL);
+
+ global_encrypted_passwords_negotiated = lp_encrypted_passwords();
+
+ if (lp_security()>=SEC_USER)
+ secword |= NEGOTIATE_SECURITY_USER_LEVEL;
+ if (global_encrypted_passwords_negotiated)
+ secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
+
+ set_message(outbuf,13,global_encrypted_passwords_negotiated?8:0,True);
+ SSVAL(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);
+ }
+
+ 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
+ readbraw writebraw (possibly) */
+ SIVAL(outbuf,smb_vwv6,sys_getpid());
+ SSVAL(outbuf,smb_vwv10, set_server_zone_offset(t)/60);
+
+ srv_put_dos_date(outbuf,smb_vwv8,t);
+
+ return (smb_len(outbuf)+4);
+}
+
+/****************************************************************************
+ Reply for the lanman 2.0 protocol.
+****************************************************************************/
+
+static int reply_lanman2(char *inbuf, char *outbuf)
+{
+ int raw = (lp_readraw()?1:0) | (lp_writeraw()?2:0);
+ int secword=0;
+ time_t t = time(NULL);
+
+ global_encrypted_passwords_negotiated = lp_encrypted_passwords();
+
+ if (lp_security()>=SEC_USER)
+ secword |= NEGOTIATE_SECURITY_USER_LEVEL;
+ if (global_encrypted_passwords_negotiated)
+ secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
+
+ set_message(outbuf,13,global_encrypted_passwords_negotiated?8:0,True);
+ SSVAL(outbuf,smb_vwv1,secword);
+ SIVAL(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);
+ }
+
+ 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);
+}
+
+/****************************************************************************
+ Generate the spnego negprot reply blob. Return the number of bytes used.
+****************************************************************************/
+
+static int negprot_spnego(char *p, uint8 *pkeylen)
+{
+ DATA_BLOB blob;
+ nstring dos_name;
+ fstring unix_name;
+ char guid[17];
+ const char *OIDs_krb5[] = {OID_KERBEROS5,
+ OID_KERBEROS5_OLD,
+ OID_NTLMSSP,
+ NULL};
+ const char *OIDs_plain[] = {OID_NTLMSSP, NULL};
+ int len;
+
+ global_spnego_negotiated = True;
+
+ ZERO_STRUCT(guid);
+
+ safe_strcpy(unix_name, global_myname(), sizeof(unix_name)-1);
+ strlower_m(unix_name);
+ push_ascii_nstring(dos_name, unix_name);
+ safe_strcpy(guid, dos_name, sizeof(guid)-1);
+
+#ifdef DEVELOPER
+ /* valgrind fixer... */
+ {
+ size_t sl = strlen(guid);
+ if (sizeof(guid)-sl)
+ memset(&guid[sl], '\0', sizeof(guid)-sl);
+ }
+#endif
+
+ /* strangely enough, NT does not sent the single OID NTLMSSP when
+ not a ADS member, it sends no OIDs at all
+
+ OLD COMMENT : "we can't do this until we teach our sesssion setup parser to know
+ about raw NTLMSSP (clients send no ASN.1 wrapping if we do this)"
+
+ Our sessionsetup code now handles raw NTLMSSP connects, so we can go
+ back to doing what W2K3 does here. This is needed to make PocketPC 2003
+ CIFS connections work with SPNEGO. See bugzilla bugs #1828 and #3133
+ for details. JRA.
+
+ */
+
+ if (lp_security() != SEC_ADS && !lp_use_kerberos_keytab()) {
+#if 0
+ /* Code for PocketPC client */
+ blob = data_blob(guid, 16);
+#else
+ /* Code for standalone WXP client */
+ blob = spnego_gen_negTokenInit(guid, OIDs_plain, "NONE");
+#endif
+ } else {
+ fstring myname;
+ char *host_princ_s = NULL;
+ name_to_fqdn(myname, global_myname());
+ strlower_m(myname);
+ asprintf(&host_princ_s, "cifs/%s@%s", myname, lp_realm());
+ blob = spnego_gen_negTokenInit(guid, OIDs_krb5, host_princ_s);
+ SAFE_FREE(host_princ_s);
+ }
+
+ memcpy(p, blob.data, blob.length);
+ len = blob.length;
+ if (len > 256) {
+ DEBUG(0,("negprot_spnego: blob length too long (%d)\n", len));
+ len = 255;
+ }
+ data_blob_free(&blob);
+
+ if (lp_security() != SEC_ADS && !lp_use_kerberos_keytab()) {
+ *pkeylen = 0;
+ } else {
+ *pkeylen = len;
+ }
+ return len;
+}
+
+/****************************************************************************
+ Reply for the nt protocol.
+****************************************************************************/
+
+static int reply_nt1(char *inbuf, char *outbuf)
+{
+ /* dual names + lock_and_read + nt SMBs + remote API calls */
+ int capabilities = CAP_NT_FIND|CAP_LOCK_AND_READ|
+ CAP_LEVEL_II_OPLOCKS;
+
+ int secword=0;
+ char *p, *q;
+ BOOL negotiate_spnego = False;
+ time_t t = time(NULL);
+
+ global_encrypted_passwords_negotiated = lp_encrypted_passwords();
+
+ /* 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)) {
+ 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);
+ }
+
+ capabilities |= CAP_NT_SMBS|CAP_RPC_REMOTE_APIS|CAP_UNICODE;
+
+ if (lp_unix_extensions()) {
+ capabilities |= CAP_UNIX;
+ }
+
+ if (lp_large_readwrite() && (SMB_OFF_T_BITS == 64))
+ capabilities |= CAP_LARGE_READX|CAP_LARGE_WRITEX|CAP_W2K_SMBS;
+
+ if (SMB_OFF_T_BITS == 64)
+ capabilities |= CAP_LARGE_FILES;
+
+ if (lp_readraw() && lp_writeraw())
+ capabilities |= CAP_RAW_MODE;
+
+ if (lp_nt_status_support())
+ capabilities |= CAP_STATUS32;
+
+ if (lp_host_msdfs())
+ capabilities |= CAP_DFS;
+
+ if (lp_security() >= SEC_USER)
+ secword |= NEGOTIATE_SECURITY_USER_LEVEL;
+ if (global_encrypted_passwords_negotiated)
+ secword |= NEGOTIATE_SECURITY_CHALLENGE_RESPONSE;
+
+ if (lp_server_signing()) {
+ if (lp_security() >= SEC_USER) {
+ secword |= NEGOTIATE_SECURITY_SIGNATURES_ENABLED;
+ /* No raw mode with smb signing. */
+ capabilities &= ~CAP_RAW_MODE;
+ if (lp_server_signing() == Required)
+ secword |=NEGOTIATE_SECURITY_SIGNATURES_REQUIRED;
+ srv_set_signing_negotiated();
+ } else {
+ DEBUG(0,("reply_nt1: smb signing is incompatible with share level security !\n"));
+ if (lp_server_signing() == Required) {
+ exit_server("reply_nt1: smb signing required and share level security selected.");
+ }
+ }
+ }
+
+ set_message(outbuf,17,0,True);
+
+ SCVAL(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);
+
+ p = q = smb_buf(outbuf);
+ if (!negotiate_spnego) {
+ /* Create a token value and add it to the outgoing packet. */
+ if (global_encrypted_passwords_negotiated) {
+ /* 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;
+ }
+ p += srvstr_push(outbuf, p, lp_workgroup(), -1,
+ STR_UNICODE|STR_TERMINATE|STR_NOALIGN);
+ DEBUG(3,("not using SPNEGO\n"));
+ } else {
+ uint8 keylen;
+ int len = negprot_spnego(p, &keylen);
+
+ SCVAL(outbuf,smb_vwv16+1,keylen);
+ p += len;
+ DEBUG(3,("using SPNEGO\n"));
+ }
+
+ SSVAL(outbuf,smb_vwv17, p - q); /* length of challenge+domain strings */
+ set_message_end(outbuf, p);
+
+ return (smb_len(outbuf)+4);
+}
+
+/* these are the protocol lists used for auto architecture detection:
+
+WinNT 3.51:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [XENIX CORE]
+protocol [MICROSOFT NETWORKS 1.03]
+protocol [LANMAN1.0]
+protocol [Windows for Workgroups 3.1a]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+protocol [NT LM 0.12]
+
+Win95:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [XENIX CORE]
+protocol [MICROSOFT NETWORKS 1.03]
+protocol [LANMAN1.0]
+protocol [Windows for Workgroups 3.1a]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+protocol [NT LM 0.12]
+
+Win2K:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [LANMAN1.0]
+protocol [Windows for Workgroups 3.1a]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+protocol [NT LM 0.12]
+
+OS/2:
+protocol [PC NETWORK PROGRAM 1.0]
+protocol [XENIX CORE]
+protocol [LANMAN1.0]
+protocol [LM1.2X002]
+protocol [LANMAN2.1]
+*/
+
+/*
+ * Modified to recognize the architecture of the remote machine better.
+ *
+ * This appears to be the matrix of which protocol is used by which
+ * MS product.
+ Protocol WfWg Win95 WinNT Win2K OS/2
+ PC NETWORK PROGRAM 1.0 1 1 1 1 1
+ XENIX CORE 2 2
+ MICROSOFT NETWORKS 3.0 2 2
+ DOS LM1.2X002 3 3
+ MICROSOFT NETWORKS 1.03 3
+ DOS LANMAN2.1 4 4
+ LANMAN1.0 4 2 3
+ Windows for Workgroups 3.1a 5 5 5 3
+ LM1.2X002 6 4 4
+ LANMAN2.1 7 5 5
+ NT LM 0.12 6 8 6
+ *
+ * tim@fsg.com 09/29/95
+ * Win2K added by matty 17/7/99
+ */
+
+#define ARCH_WFWG 0x3 /* This is a fudge because WfWg is like Win95 */
+#define ARCH_WIN95 0x2
+#define ARCH_WINNT 0x4
+#define ARCH_WIN2K 0xC /* Win2K is like NT */
+#define ARCH_OS2 0x14 /* Again OS/2 is like NT */
+#define ARCH_SAMBA 0x20
+#define ARCH_CIFSFS 0x40
+
+#define ARCH_ALL 0x7F
+
+/* List of supported protocols, most desired first */
+static const struct {
+ const char *proto_name;
+ const char *short_name;
+ int (*proto_reply_fn)(char *, char *);
+ int protocol_level;
+} supported_protocols[] = {
+ {"NT LANMAN 1.0", "NT1", reply_nt1, PROTOCOL_NT1},
+ {"NT LM 0.12", "NT1", reply_nt1, PROTOCOL_NT1},
+ {"POSIX 2", "NT1", reply_nt1, PROTOCOL_NT1},
+ {"LANMAN2.1", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
+ {"LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
+ {"Samba", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
+ {"DOS LM1.2X002", "LANMAN2", reply_lanman2, PROTOCOL_LANMAN2},
+ {"LANMAN1.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
+ {"MICROSOFT NETWORKS 3.0", "LANMAN1", reply_lanman1, PROTOCOL_LANMAN1},
+ {"MICROSOFT NETWORKS 1.03", "COREPLUS", reply_coreplus, PROTOCOL_COREPLUS},
+ {"PC NETWORK PROGRAM 1.0", "CORE", reply_corep, PROTOCOL_CORE},
+ {NULL,NULL,NULL,0},
+};
+
+/****************************************************************************
+ Reply to a negprot.
+****************************************************************************/
+
+int reply_negprot(connection_struct *conn,
+ char *inbuf,char *outbuf, int dum_size,
+ int dum_buffsize)
+{
+ int outsize = set_message(outbuf,1,0,True);
+ int Index=0;
+ int choice= -1;
+ int protocol;
+ char *p;
+ int bcc = SVAL(smb_buf(inbuf),-2);
+ int arch = ARCH_ALL;
+
+ static BOOL done_negprot = False;
+
+ START_PROFILE(SMBnegprot);
+
+ if (done_negprot) {
+ END_PROFILE(SMBnegprot);
+ exit_server("multiple negprot's are not permitted");
+ }
+ 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"))
+ arch &= ( ARCH_WFWG | ARCH_WIN95 );
+ else if (strcsequal(p,"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,"LANMAN2.1"))
+ arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
+ else if (strcsequal(p,"LM1.2X002"))
+ arch &= ( ARCH_WINNT | ARCH_WIN2K | ARCH_OS2 );
+ else if (strcsequal(p,"MICROSOFT NETWORKS 1.03"))
+ arch &= ARCH_WINNT;
+ else if (strcsequal(p,"XENIX CORE"))
+ arch &= ( ARCH_WINNT | ARCH_OS2 );
+ else if (strcsequal(p,"Samba")) {
+ arch = ARCH_SAMBA;
+ break;
+ } else if (strcsequal(p,"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)) {
+ arch = ARCH_CIFSFS;
+ }
+
+ switch ( arch ) {
+ case ARCH_CIFSFS:
+ set_remote_arch(RA_CIFSFS);
+ break;
+ case ARCH_SAMBA:
+ set_remote_arch(RA_SAMBA);
+ break;
+ case ARCH_WFWG:
+ set_remote_arch(RA_WFWG);
+ break;
+ case ARCH_WIN95:
+ set_remote_arch(RA_WIN95);
+ break;
+ case ARCH_WINNT:
+ if(SVAL(inbuf,smb_flg2)==FLAGS2_WIN2K_SIGNATURE)
+ set_remote_arch(RA_WIN2K);
+ else
+ set_remote_arch(RA_WINNT);
+ break;
+ case ARCH_WIN2K:
+ set_remote_arch(RA_WIN2K);
+ break;
+ case ARCH_OS2:
+ set_remote_arch(RA_OS2);
+ break;
+ default:
+ set_remote_arch(RA_UNKNOWN);
+ break;
+ }
+
+ /* possibly reload - change of architecture */
+ reload_services(True);
+
+ /* moved from the netbios session setup code since we don't have that
+ 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);
+
+ /* Check for protocols, most desirable first */
+ for (protocol = 0; supported_protocols[protocol].proto_name; protocol++) {
+ p = smb_buf(inbuf)+1;
+ Index = 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;
+ }
+ 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);
+ DEBUG(3,("Selected protocol %s\n",supported_protocols[protocol].proto_name));
+ } else {
+ DEBUG(0,("No protocol supported !\n"));
+ }
+ SSVAL(outbuf,smb_vwv0,choice);
+
+ DEBUG( 5, ( "negprot index=%d\n", choice ) );
+
+ if ((lp_server_signing() == Required) && (Protocol < PROTOCOL_NT1)) {
+ exit_server("SMB signing is required and client negotiated a downlevel protocol");
+ }
+
+ END_PROFILE(SMBnegprot);
+ return(outsize);
+}
projects / samba / blobdiff