/*
- Unix SMB/Netbios implementation.
- Version 3.0
+ Unix SMB/CIFS implementation.
handle SMBsessionsetup
Copyright (C) Andrew Tridgell 1998-2001
Copyright (C) Andrew Bartlett 2001
+ Copyright (C) Jim McDonough 2002
+ Copyright (C) Luke Howard 2003
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
#include "includes.h"
-#if HAVE_KRB5
+uint32 global_client_caps = 0;
+
+static struct auth_ntlmssp_state *global_ntlmssp_state;
+
+/*
+ on a logon error possibly map the error to success if "map to guest"
+ is set approriately
+*/
+static NTSTATUS do_map_to_guest(NTSTATUS status, auth_serversupplied_info **server_info,
+ const char *user, const char *domain)
+{
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NO_SUCH_USER)) {
+ if ((lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_USER) ||
+ (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD)) {
+ DEBUG(3,("No such user %s [%s] - using guest account\n",
+ user, domain));
+ status = make_server_info_guest(server_info);
+ }
+ }
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_WRONG_PASSWORD)) {
+ if (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD) {
+ DEBUG(3,("Registered username %s for guest access\n",user));
+ status = make_server_info_guest(server_info);
+ }
+ }
+
+ return status;
+}
+
+
+/****************************************************************************
+ Add the standard 'Samba' signature to the end of the session setup.
+****************************************************************************/
+static int add_signature(char *outbuf, char *p)
+{
+ char *start = p;
+ fstring lanman;
+
+ snprintf( lanman, sizeof(lanman), "Samba %s", VERSION );
+
+ p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
+ p += srvstr_push(outbuf, p, lanman, -1, STR_TERMINATE);
+ p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
+
+ return PTR_DIFF(p, start);
+}
+
+/****************************************************************************
+send a security blob via a session setup reply
+****************************************************************************/
+static BOOL reply_sesssetup_blob(connection_struct *conn, char *outbuf,
+ DATA_BLOB blob, NTSTATUS nt_status)
+{
+ char *p;
+
+ set_message(outbuf,4,0,True);
+
+ nt_status = nt_status_squash(nt_status);
+ SIVAL(outbuf, smb_rcls, NT_STATUS_V(nt_status));
+ SSVAL(outbuf, smb_vwv0, 0xFF); /* no chaining possible */
+ SSVAL(outbuf, smb_vwv3, blob.length);
+ p = smb_buf(outbuf);
+
+ /* should we cap this? */
+ memcpy(p, blob.data, blob.length);
+ p += blob.length;
+
+ p += add_signature( outbuf, p );
+
+ set_message_end(outbuf,p);
+
+ return send_smb(smbd_server_fd(),outbuf);
+}
+
+/****************************************************************************
+ Do a 'guest' logon, getting back the
+****************************************************************************/
+static NTSTATUS check_guest_password(auth_serversupplied_info **server_info)
+{
+ struct auth_context *auth_context;
+ auth_usersupplied_info *user_info = NULL;
+
+ NTSTATUS nt_status;
+ unsigned char chal[8];
+
+ ZERO_STRUCT(chal);
+
+ DEBUG(3,("Got anonymous request\n"));
+
+ if (!NT_STATUS_IS_OK(nt_status = make_auth_context_fixed(&auth_context, chal))) {
+ return nt_status;
+ }
+
+ if (!make_user_info_guest(&user_info)) {
+ (auth_context->free)(&auth_context);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ nt_status = auth_context->check_ntlm_password(auth_context, user_info, server_info);
+ (auth_context->free)(&auth_context);
+ free_user_info(&user_info);
+ return nt_status;
+}
+
+
+#ifdef HAVE_KRB5
/****************************************************************************
reply to a session setup spnego negotiate packet for kerberos
****************************************************************************/
DATA_BLOB *secblob)
{
DATA_BLOB ticket;
- krb5_context context;
- krb5_principal server;
- krb5_auth_context auth_context = NULL;
- krb5_keytab keytab = NULL;
- krb5_data packet;
- krb5_ticket *tkt = NULL;
- int ret;
- char *realm, *client, *p;
- fstring service;
- extern pstring global_myname;
+ char *client, *p;
const struct passwd *pw;
char *user;
- gid_t gid;
- uid_t uid;
- char *full_name;
int sess_vuid;
-
- realm = lp_realm();
-
- if (!spnego_parse_krb5_wrap(*secblob, &ticket)) {
+ NTSTATUS ret;
+ DATA_BLOB auth_data;
+ DATA_BLOB ap_rep, ap_rep_wrapped, response;
+ auth_serversupplied_info *server_info = NULL;
+ ADS_STRUCT *ads;
+ uint8 session_key[16];
+ uint8 tok_id[2];
+ BOOL foreign = False;
+
+ ZERO_STRUCT(ticket);
+ ZERO_STRUCT(auth_data);
+ ZERO_STRUCT(ap_rep);
+ ZERO_STRUCT(ap_rep_wrapped);
+ ZERO_STRUCT(response);
+
+ if (!spnego_parse_krb5_wrap(*secblob, &ticket, tok_id)) {
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
- /* the service is the wins name lowercase with $ tacked on */
- fstrcpy(service, global_myname);
- strlower(service);
- fstrcat(service, "$");
-
- ret = krb5_init_context(&context);
- if (ret) {
- DEBUG(1,("krb5_init_context failed (%s)\n", error_message(ret)));
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
+ ads = ads_init_simple();
- ret = krb5_build_principal(context, &server, strlen(realm),
- realm, service, NULL);
- if (ret) {
- DEBUG(1,("krb5_build_principal failed (%s)\n", error_message(ret)));
+ if (!ads) {
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
- packet.length = ticket.length;
- packet.data = (krb5_pointer)ticket.data;
+ ads->auth.realm = strdup(lp_realm());
- if ((ret = krb5_rd_req(context, &auth_context, &packet,
- server, keytab, NULL, &tkt))) {
- DEBUG(3,("krb5_rd_req failed (%s)\n",
- error_message(ret)));
+ ret = ads_verify_ticket(ads, &ticket, &client, &auth_data, &ap_rep, session_key);
+ if (!NT_STATUS_IS_OK(ret)) {
+ DEBUG(1,("Failed to verify incoming ticket!\n"));
+ ads_destroy(&ads);
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
- if ((ret = krb5_unparse_name(context, tkt->enc_part2->client,
- &client))) {
- DEBUG(3,("krb5_unparse_name failed (%s)\n",
- error_message(ret)));
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
+ data_blob_free(&auth_data);
DEBUG(3,("Ticket name is [%s]\n", client));
p = strchr_m(client, '@');
if (!p) {
- DEBUG(3,("Doesn't look like a valid principle\n"));
+ DEBUG(3,("Doesn't look like a valid principal\n"));
+ ads_destroy(&ads);
+ data_blob_free(&ap_rep);
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
*p = 0;
- if (strcasecmp(p+1, realm) != 0) {
- DEBUG(3,("Ticket for incorrect realm %s\n", p+1));
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ if (strcasecmp(p+1, ads->auth.realm) != 0) {
+ DEBUG(3,("Ticket for foreign realm %s@%s\n", client, p+1));
+ if (!lp_allow_trusted_domains()) {
+ data_blob_free(&ap_rep);
+ return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ }
+ foreign = True;
}
+
+ /* this gives a fully qualified user name (ie. with full realm).
+ that leads to very long usernames, but what else can we do? */
+ asprintf(&user, "%s%s%s", p+1, lp_winbind_separator(), client);
- user = client;
+ pw = Get_Pwnam(user);
+ if (!pw && !foreign) {
+ pw = Get_Pwnam(client);
+ SAFE_FREE(user);
+ user = smb_xstrdup(client);
+ }
+
+ ads_destroy(&ads);
+
+ /* setup the string used by %U */
+ sub_set_smb_name(user);
+
+ reload_services(True);
- /* the password is good - let them in */
- pw = smb_getpwnam(user,False);
if (!pw) {
DEBUG(1,("Username %s is invalid on this system\n",user));
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ data_blob_free(&ap_rep);
+ return ERROR_NT(NT_STATUS_NO_SUCH_USER);
}
- gid = pw->pw_gid;
- uid = pw->pw_uid;
- full_name = pw->pw_gecos;
-
- sess_vuid = register_vuid(uid,gid,user,user,realm,False, full_name);
+
+ if (!NT_STATUS_IS_OK(ret = make_server_info_pw(&server_info,pw))) {
+ DEBUG(1,("make_server_info_from_pw failed!\n"));
+ data_blob_free(&ap_rep);
+ return ERROR_NT(ret);
+ }
+
+ /* Copy out the session key from the AP_REQ. */
+ memcpy(server_info->session_key, session_key, sizeof(session_key));
+
+ /* register_vuid keeps the server info */
+ sess_vuid = register_vuid(server_info, user);
+
+ free(user);
if (sess_vuid == -1) {
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ ret = NT_STATUS_LOGON_FAILURE;
+ } else {
+ set_message(outbuf,4,0,True);
+ SSVAL(outbuf, smb_vwv3, 0);
+
+ if (server_info->guest) {
+ SSVAL(outbuf,smb_vwv2,1);
+ }
+
+ SSVAL(outbuf, smb_uid, sess_vuid);
}
- set_message(outbuf,4,0,True);
- SSVAL(outbuf, smb_vwv3, 0);
- p = smb_buf(outbuf);
- p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
- set_message_end(outbuf,p);
-
- SSVAL(outbuf,smb_uid,sess_vuid);
- SSVAL(inbuf,smb_uid,sess_vuid);
-
- return chain_reply(inbuf,outbuf,length,bufsize);
+ /* wrap that up in a nice GSS-API wrapping */
+ if (NT_STATUS_IS_OK(ret)) {
+ ap_rep_wrapped = spnego_gen_krb5_wrap(ap_rep, TOK_ID_KRB_AP_REP);
+ } else {
+ ap_rep_wrapped = data_blob(NULL, 0);
+ }
+ response = spnego_gen_auth_response(&ap_rep_wrapped, ret, OID_KERBEROS5_OLD);
+ reply_sesssetup_blob(conn, outbuf, response, ret);
+
+ data_blob_free(&ap_rep);
+ data_blob_free(&ap_rep_wrapped);
+ data_blob_free(&response);
+
+ return -1; /* already replied */
}
#endif
/****************************************************************************
-send a security blob via a session setup reply
-****************************************************************************/
-static BOOL reply_sesssetup_blob(connection_struct *conn, char *outbuf,
- DATA_BLOB blob)
+ send a session setup reply, wrapped in SPNEGO.
+ get vuid and check first.
+ end the NTLMSSP exchange context if we are OK/complete fail
+***************************************************************************/
+static BOOL reply_spnego_ntlmssp(connection_struct *conn, char *outbuf,
+ AUTH_NTLMSSP_STATE **auth_ntlmssp_state,
+ DATA_BLOB *ntlmssp_blob, NTSTATUS nt_status)
{
- char *p;
+ BOOL ret;
+ DATA_BLOB response;
+ struct auth_serversupplied_info *server_info = NULL;
- set_message(outbuf,4,0,True);
+ if (NT_STATUS_IS_OK(nt_status)) {
+ server_info = (*auth_ntlmssp_state)->server_info;
+ } else {
+ nt_status = do_map_to_guest(nt_status,
+ &server_info,
+ (*auth_ntlmssp_state)->ntlmssp_state->user,
+ (*auth_ntlmssp_state)->ntlmssp_state->domain);
+ }
- /* we set NT_STATUS_MORE_PROCESSING_REQUIRED to tell the other end
- that we aren't finished yet */
+ if (NT_STATUS_IS_OK(nt_status)) {
+ int sess_vuid;
+ /* register_vuid keeps the server info */
+ sess_vuid = register_vuid(server_info, (*auth_ntlmssp_state)->ntlmssp_state->user);
+ (*auth_ntlmssp_state)->server_info = NULL;
- SIVAL(outbuf, smb_rcls, NT_STATUS_V(NT_STATUS_MORE_PROCESSING_REQUIRED));
- SSVAL(outbuf, smb_vwv0, 0xFF); /* no chaining possible */
- SSVAL(outbuf, smb_vwv3, blob.length);
- p = smb_buf(outbuf);
- memcpy(p, blob.data, blob.length);
- p += blob.length;
- p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
- set_message_end(outbuf,p);
-
- return send_smb(smbd_server_fd(),outbuf);
+ if (sess_vuid == -1) {
+ nt_status = NT_STATUS_LOGON_FAILURE;
+ } else {
+
+ set_message(outbuf,4,0,True);
+ SSVAL(outbuf, smb_vwv3, 0);
+
+ if (server_info->guest) {
+ SSVAL(outbuf,smb_vwv2,1);
+ }
+
+ SSVAL(outbuf,smb_uid,sess_vuid);
+ }
+ }
+
+ response = spnego_gen_auth_response(ntlmssp_blob, nt_status, OID_NTLMSSP);
+ ret = reply_sesssetup_blob(conn, outbuf, response, nt_status);
+ data_blob_free(&response);
+
+ /* NT_STATUS_MORE_PROCESSING_REQUIRED from our NTLMSSP code tells us,
+ and the other end, that we are not finished yet. */
+
+ if (!ret || !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
+ auth_ntlmssp_end(auth_ntlmssp_state);
+ }
+
+ return ret;
}
/****************************************************************************
char *OIDs[ASN1_MAX_OIDS];
DATA_BLOB secblob;
int i;
- uint32 ntlmssp_command, neg_flags;
- DATA_BLOB sess_key, chal, spnego_chal;
- uint8 cryptkey[8];
+ DATA_BLOB chal;
BOOL got_kerberos = False;
+ NTSTATUS nt_status;
/* parse out the OIDs and the first sec blob */
if (!parse_negTokenTarg(blob1, OIDs, &secblob)) {
for (i=0;OIDs[i];i++) {
DEBUG(3,("Got OID %s\n", OIDs[i]));
- if (strcmp(OID_KERBEROS5_OLD, OIDs[i]) == 0) {
+ if (strcmp(OID_KERBEROS5, OIDs[i]) == 0 ||
+ strcmp(OID_KERBEROS5_OLD, OIDs[i]) == 0) {
got_kerberos = True;
}
free(OIDs[i]);
}
DEBUG(3,("Got secblob of size %d\n", secblob.length));
-#if HAVE_KRB5
- if (got_kerberos) {
+#ifdef HAVE_KRB5
+ if (got_kerberos && (SEC_ADS == lp_security())) {
int ret = reply_spnego_kerberos(conn, inbuf, outbuf,
length, bufsize, &secblob);
data_blob_free(&secblob);
}
#endif
- /* parse the NTLMSSP packet */
-#if 0
- file_save("secblob.dat", secblob.data, secblob.length);
-#endif
-
- if (!msrpc_parse(&secblob, "CddB",
- "NTLMSSP",
- &ntlmssp_command,
- &neg_flags,
- &sess_key)) {
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ if (global_ntlmssp_state) {
+ auth_ntlmssp_end(&global_ntlmssp_state);
}
- data_blob_free(&secblob);
- data_blob_free(&sess_key);
-
- if (ntlmssp_command != NTLMSSP_NEGOTIATE) {
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ nt_status = auth_ntlmssp_start(&global_ntlmssp_state);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return ERROR_NT(nt_status);
}
- DEBUG(3,("Got neg_flags=%08x\n", neg_flags));
+ nt_status = auth_ntlmssp_update(global_ntlmssp_state,
+ secblob, &chal);
- if (!last_challenge(cryptkey)) {
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
-
- /* Give them the challenge. For now, ignore neg_flags and just
- return the flags we want. Obviously this is not correct */
-
- neg_flags = NTLMSSP_NEGOTIATE_UNICODE |
- NTLMSSP_NEGOTIATE_LM_KEY |
- NTLMSSP_NEGOTIATE_NTLM;
-
- msrpc_gen(&chal, "Cddddbdddd",
- "NTLMSSP",
- NTLMSSP_CHALLENGE,
- 0,
- 0x30, /* ?? */
- neg_flags,
- cryptkey, 8,
- 0, 0, 0,
- 0x3000); /* ?? */
-
- if (!spnego_gen_challenge(&spnego_chal, &chal, &chal)) {
- DEBUG(3,("Failed to generate challenge\n"));
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
-
- /* now tell the client to send the auth packet */
- reply_sesssetup_blob(conn, outbuf, spnego_chal);
+ data_blob_free(&secblob);
+ reply_spnego_ntlmssp(conn, outbuf, &global_ntlmssp_state,
+ &chal, nt_status);
+
data_blob_free(&chal);
- data_blob_free(&spnego_chal);
- /* and tell smbd that we have already replied to this packet */
+ /* already replied */
return -1;
}
int length, int bufsize,
DATA_BLOB blob1)
{
- DATA_BLOB auth;
- char *workgroup, *user, *machine;
- DATA_BLOB lmhash, nthash, sess_key;
- uint32 ntlmssp_command, neg_flags;
- NTSTATUS nt_status;
- int sess_vuid;
- gid_t gid;
- uid_t uid;
- char *full_name;
- char *p;
- const struct passwd *pw;
+ DATA_BLOB auth, auth_reply;
+ NTSTATUS nt_status = NT_STATUS_INVALID_PARAMETER;
if (!spnego_parse_auth(blob1, &auth)) {
#if 0
file_save("auth.dat", blob1.data, blob1.length);
#endif
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
-
- /* now the NTLMSSP encoded auth hashes */
- if (!msrpc_parse(&auth, "CdBBUUUBd",
- "NTLMSSP",
- &ntlmssp_command,
- &lmhash,
- &nthash,
- &workgroup,
- &user,
- &machine,
- &sess_key,
- &neg_flags)) {
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
-
- data_blob_free(&auth);
- data_blob_free(&sess_key);
- DEBUG(3,("Got user=[%s] workgroup=[%s] machine=[%s] len1=%d len2=%d\n",
- user, workgroup, machine, lmhash.length, nthash.length));
-
-#if 0
- file_save("nthash1.dat", nthash.data, nthash.length);
- file_save("lmhash1.dat", lmhash.data, lmhash.length);
-#endif
-
- nt_status = pass_check_smb(user, user,
- workgroup, machine,
- lmhash.data,
- lmhash.length,
- nthash.data,
- nthash.length);
-
- data_blob_free(&nthash);
- data_blob_free(&lmhash);
-
- if (!NT_STATUS_IS_OK(nt_status)) {
- return ERROR_NT(nt_status);
- }
-
- /* the password is good - let them in */
- pw = smb_getpwnam(user,False);
- if (!pw) {
- DEBUG(1,("Username %s is invalid on this system\n",user));
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ if (!global_ntlmssp_state) {
+ /* auth before negotiatiate? */
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
- gid = pw->pw_gid;
- uid = pw->pw_uid;
- full_name = pw->pw_gecos;
+
+ nt_status = auth_ntlmssp_update(global_ntlmssp_state,
+ auth, &auth_reply);
- sess_vuid = register_vuid(uid,gid,user,user,workgroup,False, full_name);
+ data_blob_free(&auth);
- free(user);
- free(workgroup);
- free(machine);
-
- if (sess_vuid == -1) {
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
+ reply_spnego_ntlmssp(conn, outbuf, &global_ntlmssp_state,
+ &auth_reply, nt_status);
+
+ data_blob_free(&auth_reply);
- set_message(outbuf,4,0,True);
- SSVAL(outbuf, smb_vwv3, 0);
- p = smb_buf(outbuf);
- p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
- set_message_end(outbuf,p);
-
- SSVAL(outbuf,smb_uid,sess_vuid);
- SSVAL(inbuf,smb_uid,sess_vuid);
-
- return chain_reply(inbuf,outbuf,length,bufsize);
+ /* and tell smbd that we have already replied to this packet */
+ return -1;
}
/****************************************************************************
reply to a session setup command
****************************************************************************/
-static int reply_sesssetup_and_X_spnego(connection_struct *conn, char *inbuf,char *outbuf,
+static int reply_sesssetup_and_X_spnego(connection_struct *conn, char *inbuf,
+ char *outbuf,
int length,int bufsize)
{
uint8 *p;
DATA_BLOB blob1;
- extern uint32 global_client_caps;
int ret;
+ size_t bufrem;
+ fstring native_os, native_lanman;
+ char *p2;
+ uint16 data_blob_len = SVAL(inbuf, smb_vwv7);
+ enum remote_arch_types ra_type = get_remote_arch();
+
+ DEBUG(3,("Doing spnego session setup\n"));
if (global_client_caps == 0) {
global_client_caps = IVAL(inbuf,smb_vwv10);
}
- p = smb_buf(inbuf);
+ p = (uint8 *)smb_buf(inbuf);
+ if (data_blob_len == 0) {
+ /* an invalid request */
+ return ERROR_NT(NT_STATUS_LOGON_FAILURE);
+ }
+
+ bufrem = smb_bufrem(inbuf, p);
/* pull the spnego blob */
- blob1 = data_blob(p, SVAL(inbuf, smb_vwv7));
-
+ blob1 = data_blob(p, MIN(bufrem, data_blob_len));
+
#if 0
- chdir("/home/tridge");
file_save("negotiate.dat", blob1.data, blob1.length);
#endif
+ p2 = inbuf + smb_vwv13 + data_blob_len;
+ p2 += srvstr_pull_buf(inbuf, native_os, p2, sizeof(native_os), STR_TERMINATE);
+ p2 += srvstr_pull_buf(inbuf, native_lanman, p2, sizeof(native_lanman), STR_TERMINATE);
+ DEBUG(3,("NativeOS=[%s] NativeLanMan=[%s]\n", native_os, native_lanman));
+
+ if ( ra_type == RA_WIN2K )
+ ra_lanman_string( native_lanman );
+
if (blob1.data[0] == ASN1_APPLICATION(0)) {
/* its a negTokenTarg packet */
ret = reply_spnego_negotiate(conn, inbuf, outbuf, length, bufsize, blob1);
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
+/****************************************************************************
+ On new VC == 0, shutdown *all* old connections and users.
+ It seems that only NT4.x does this. At W2K and above (XP etc.).
+ a new session setup with VC==0 is ignored.
+****************************************************************************/
+
+static void setup_new_vc_session(void)
+{
+ DEBUG(2,("setup_new_vc_session: New VC == 0, if NT4.x compatible we would close all old resources.\n"));
+#if 0
+ conn_close_all();
+ invalidate_all_vuids();
+#endif
+}
/****************************************************************************
reply to a session setup command
int length,int bufsize)
{
int sess_vuid;
- gid_t gid;
- uid_t uid;
- char* full_name;
int smb_bufsize;
- int smb_apasslen = 0;
- pstring smb_apasswd;
- int smb_ntpasslen = 0;
- pstring smb_ntpasswd;
- pstring user;
- pstring orig_user;
+ DATA_BLOB lm_resp;
+ DATA_BLOB nt_resp;
+ DATA_BLOB plaintext_password;
+ fstring user;
+ fstring sub_user; /* Sainitised username for substituion */
fstring domain;
fstring native_os;
fstring native_lanman;
- BOOL guest=False;
static BOOL done_sesssetup = False;
extern BOOL global_encrypted_passwords_negotiated;
- extern uint32 global_client_caps;
+ extern BOOL global_spnego_negotiated;
extern int Protocol;
- extern fstring remote_machine;
- extern userdom_struct current_user_info;
extern int max_send;
+
+ auth_usersupplied_info *user_info = NULL;
+ extern struct auth_context *negprot_global_auth_context;
+ auth_serversupplied_info *server_info = NULL;
+
+ NTSTATUS nt_status;
+
BOOL doencrypt = global_encrypted_passwords_negotiated;
- START_PROFILE(SMBsesssetupX);
- if (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY) {
- /* it's a SPNEGO session setup */
+ START_PROFILE(SMBsesssetupX);
+
+ ZERO_STRUCT(lm_resp);
+ ZERO_STRUCT(nt_resp);
+ ZERO_STRUCT(plaintext_password);
+
+ DEBUG(3,("wct=%d flg2=0x%x\n", CVAL(inbuf, smb_wct), SVAL(inbuf, smb_flg2)));
+
+ /* a SPNEGO session setup has 12 command words, whereas a normal
+ NT1 session setup has 13. See the cifs spec. */
+ if (CVAL(inbuf, smb_wct) == 12 &&
+ (SVAL(inbuf, smb_flg2) & FLAGS2_EXTENDED_SECURITY)) {
+ if (!global_spnego_negotiated) {
+ DEBUG(0,("reply_sesssetup_and_X: Rejecting attempt at SPNEGO session setup when it was not negoitiated.\n"));
+ return ERROR_NT(NT_STATUS_UNSUCCESSFUL);
+ }
+
+ if (SVAL(inbuf,smb_vwv4) == 0) {
+ setup_new_vc_session();
+ }
return reply_sesssetup_and_X_spnego(conn, inbuf, outbuf, length, bufsize);
}
- *smb_apasswd = *smb_ntpasswd = 0;
-
smb_bufsize = SVAL(inbuf,smb_vwv2);
-
+
if (Protocol < PROTOCOL_NT1) {
- smb_apasslen = SVAL(inbuf,smb_vwv7);
- if (smb_apasslen > MAX_PASS_LEN) {
- return ERROR_DOS(ERRDOS,ERRbuftoosmall);
+ uint16 passlen1 = SVAL(inbuf,smb_vwv7);
+ if ((passlen1 > MAX_PASS_LEN) || (passlen1 > smb_bufrem(inbuf, smb_buf(inbuf)))) {
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
- memcpy(smb_apasswd,smb_buf(inbuf),smb_apasslen);
- srvstr_pull(inbuf, user, smb_buf(inbuf)+smb_apasslen, sizeof(user), -1, STR_TERMINATE);
-
- if (!doencrypt && (lp_security() != SEC_SERVER)) {
- smb_apasslen = strlen(smb_apasswd);
+ if (doencrypt) {
+ lm_resp = data_blob(smb_buf(inbuf), passlen1);
+ } else {
+ plaintext_password = data_blob(smb_buf(inbuf), passlen1+1);
+ /* Ensure null termination */
+ plaintext_password.data[passlen1] = 0;
}
+
+ srvstr_pull_buf(inbuf, user, smb_buf(inbuf)+passlen1, sizeof(user), STR_TERMINATE);
+ *domain = 0;
+
} else {
uint16 passlen1 = SVAL(inbuf,smb_vwv7);
uint16 passlen2 = SVAL(inbuf,smb_vwv8);
enum remote_arch_types ra_type = get_remote_arch();
char *p = smb_buf(inbuf);
-
+
if(global_client_caps == 0)
global_client_caps = IVAL(inbuf,smb_vwv11);
set_remote_arch( RA_WIN95);
}
}
-
- if (passlen1 != 24 && passlen2 < 24)
- doencrypt = False;
-
- if (passlen1 > MAX_PASS_LEN) {
- return ERROR_DOS(ERRDOS,ERRbuftoosmall);
- }
-
- passlen1 = MIN(passlen1, MAX_PASS_LEN);
- passlen2 = MIN(passlen2, MAX_PASS_LEN);
-
+
if (!doencrypt) {
/* both Win95 and WinNT stuff up the password lengths for
non-encrypting systems. Uggh.
passlen2 = 0;
}
- if (lp_restrict_anonymous()) {
- /* there seems to be no reason behind the
- * differences in MS clients formatting
- * various info like the domain, NativeOS, and
- * NativeLanMan fields. Win95 in particular
- * seems to have an extra null byte between
- * the username and the domain, or the
- * password length calculation is wrong, which
- * throws off the string extraction routines
- * below. This makes the value of domain be
- * the empty string, which fails the restrict
- * anonymous check further down. This
- * compensates for that, and allows browsing
- * to work in mixed NT and win95 environments
- * even when restrict anonymous is true. AAB
- * */
- dump_data(100, p, 0x70);
- DEBUG(9, ("passlen1=%d, passlen2=%d\n", passlen1, passlen2));
- if (ra_type == RA_WIN95 && !passlen1 && !passlen2 && p[0] == 0 && p[1] == 0) {
- DEBUG(0, ("restrict anonymous parameter used in a win95 environment!\n"));
- DEBUG(0, ("client is win95 and broken passlen1 offset -- attempting fix\n"));
- DEBUG(0, ("if win95 cilents are having difficulty browsing, you will be unable to use restrict anonymous\n"));
- passlen1 = 1;
- }
+ /* check for nasty tricks */
+ if (passlen1 > MAX_PASS_LEN || passlen1 > smb_bufrem(inbuf, p)) {
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
}
- /* Save the lanman2 password and the NT md4 password. */
- smb_apasslen = passlen1;
- memcpy(smb_apasswd,p,smb_apasslen);
+ if (passlen2 > MAX_PASS_LEN || passlen2 > smb_bufrem(inbuf, p+passlen1)) {
+ return ERROR_NT(NT_STATUS_INVALID_PARAMETER);
+ }
- smb_ntpasslen = passlen2;
- memcpy(smb_ntpasswd,p+passlen1,smb_ntpasslen);
+ /* Save the lanman2 password and the NT md4 password. */
+
+ if ((doencrypt) && (passlen1 != 0) && (passlen1 != 24)) {
+ doencrypt = False;
+ }
- if (smb_apasslen != 24 || !doencrypt) {
- /* trim the password */
- smb_apasslen = strlen(smb_apasswd);
-
- /* wfwg sometimes uses a space instead of a null */
- if (strequal(smb_apasswd," ")) {
- smb_apasslen = 0;
- *smb_apasswd = 0;
- }
+ if (doencrypt) {
+ lm_resp = data_blob(p, passlen1);
+ nt_resp = data_blob(p+passlen1, passlen2);
+ } else {
+ pstring pass;
+ BOOL unic;
+ unic=SVAL(inbuf, smb_flg2) & FLAGS2_UNICODE_STRINGS;
+ srvstr_pull(inbuf, pass, smb_buf(inbuf),
+ sizeof(pass), unic ? passlen2 : passlen1,
+ STR_TERMINATE);
+ plaintext_password = data_blob(pass, strlen(pass)+1);
}
p += passlen1 + passlen2;
- p += srvstr_pull(inbuf, user, p, sizeof(user), -1,
- STR_TERMINATE);
- p += srvstr_pull(inbuf, domain, p, sizeof(domain),
- -1, STR_TERMINATE);
- p += srvstr_pull(inbuf, native_os, p, sizeof(native_os),
- -1, STR_TERMINATE);
- p += srvstr_pull(inbuf, native_lanman, p, sizeof(native_lanman),
- -1, STR_TERMINATE);
+ p += srvstr_pull_buf(inbuf, user, p, sizeof(user), STR_TERMINATE);
+ p += srvstr_pull_buf(inbuf, domain, p, sizeof(domain), STR_TERMINATE);
+ p += srvstr_pull_buf(inbuf, native_os, p, sizeof(native_os), STR_TERMINATE);
+ p += srvstr_pull_buf(inbuf, native_lanman, p, sizeof(native_lanman), STR_TERMINATE);
DEBUG(3,("Domain=[%s] NativeOS=[%s] NativeLanMan=[%s]\n",
domain,native_os,native_lanman));
+
+ if ( ra_type == RA_WIN2K )
+ ra_lanman_string( native_lanman );
+
}
- /* don't allow for weird usernames or domains */
- alpha_strcpy(user, user, ". _-$", sizeof(user));
- alpha_strcpy(domain, domain, ". _-", sizeof(domain));
- if (strstr(user, "..") || strstr(domain,"..")) {
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
-
- if (lp_security() == SEC_SHARE) {
- /* in share level we should ignore any passwords */
- smb_ntpasslen = 0;
- smb_apasslen = 0;
- guest = True;
+ if (SVAL(inbuf,smb_vwv4) == 0) {
+ setup_new_vc_session();
}
+ DEBUG(3,("sesssetupX:name=[%s]\\[%s]@[%s]\n", domain, user, get_remote_machine_name()));
- DEBUG(3,("sesssetupX:name=[%s]\\[%s]@[%s]\n",user, domain, remote_machine));
-
- if (done_sesssetup && lp_restrict_anonymous()) {
- /* tests show that even if browsing is done over
- * already validated connections without a username
- * and password the domain is still provided, which it
- * wouldn't be if it was a purely anonymous
- * connection. So, in order to restrict anonymous, we
- * only deny connections that have no session
- * information. If a domain has been provided, then
- * it's not a purely anonymous connection. AAB */
- if (!*user && !*smb_apasswd && !*domain) {
- DEBUG(0, ("restrict anonymous is True and anonymous connection attempted. Denying access.\n"));
- END_PROFILE(SMBsesssetupX);
- return ERROR_DOS(ERRDOS,ERRnoaccess);
+ if (*user) {
+ if (global_spnego_negotiated) {
+
+ /* This has to be here, because this is a perfectly valid behaviour for guest logons :-( */
+
+ DEBUG(0,("reply_sesssetup_and_X: Rejecting attempt at 'normal' session setup after negotiating spnego.\n"));
+ return ERROR_NT(NT_STATUS_UNSUCCESSFUL);
}
- }
+ fstrcpy(sub_user, user);
- /* If no username is sent use the guest account */
- if (!*user) {
- pstrcpy(user,lp_guestaccount(-1));
- guest = True;
+ /* setup the string used by %U */
+ sub_set_smb_name(user);
+ } else {
+ fstrcpy(sub_user, lp_guestaccount());
}
-
- pstrcpy(current_user_info.smb_name,user);
-
+
+ sub_set_smb_name(sub_user);
+
reload_services(True);
- /*
- * Save the username before mapping. We will use
- * the original username sent to us for security=server
- * and security=domain checking.
- */
-
- pstrcpy( orig_user, user);
-
- /*
- * Always try the "DOMAIN\user" lookup first, as this is the most
- * specific case. If this fails then try the simple "user" lookup.
- * But don't do this for guests, as this is always a local user.
- */
+ if (lp_security() == SEC_SHARE) {
+ /* in share level we should ignore any passwords */
+
+ data_blob_free(&lm_resp);
+ data_blob_free(&nt_resp);
+ data_blob_clear_free(&plaintext_password);
+
+ map_username(sub_user);
+ add_session_user(sub_user);
+ /* Then force it to null for the benfit of the code below */
+ *user = 0;
+ }
- if (!guest) {
- pstring dom_user;
-
- /* Work out who's who */
-
- slprintf(dom_user, sizeof(dom_user) - 1,"%s%s%s",
- domain, lp_winbind_separator(), user);
-
- if (sys_getpwnam(dom_user) != NULL) {
- pstrcpy(user, dom_user);
- DEBUG(3,("Using unix username %s\n", dom_user));
+ if (!*user) {
+
+ nt_status = check_guest_password(&server_info);
+
+ } else if (doencrypt) {
+ if (!negprot_global_auth_context) {
+ DEBUG(0, ("reply_sesssetup_and_X: Attempted encrypted session setup without negprot denied!\n"));
+ return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
+ nt_status = make_user_info_for_reply_enc(&user_info, user, domain,
+ lm_resp, nt_resp);
+ if (NT_STATUS_IS_OK(nt_status)) {
+ nt_status = negprot_global_auth_context->check_ntlm_password(negprot_global_auth_context,
+ user_info,
+ &server_info);
+ }
+ } else {
+ struct auth_context *plaintext_auth_context = NULL;
+ const uint8 *chal;
+ if (NT_STATUS_IS_OK(nt_status = make_auth_context_subsystem(&plaintext_auth_context))) {
+ chal = plaintext_auth_context->get_ntlm_challenge(plaintext_auth_context);
+
+ if (!make_user_info_for_reply(&user_info,
+ user, domain, chal,
+ plaintext_password)) {
+ nt_status = NT_STATUS_NO_MEMORY;
+ }
- /*
- * Pass the user through the NT -> unix user mapping
- * function.
- */
-
- (void)map_username(user);
-
- /*
- * Do any UNIX username case mangling.
- */
- smb_getpwnam(user, True);
+ if (NT_STATUS_IS_OK(nt_status)) {
+ nt_status = plaintext_auth_context->check_ntlm_password(plaintext_auth_context,
+ user_info,
+ &server_info);
+
+ (plaintext_auth_context->free)(&plaintext_auth_context);
+ }
+ }
}
+
+ free_user_info(&user_info);
- add_session_user(user);
+ data_blob_free(&lm_resp);
+ data_blob_free(&nt_resp);
+ data_blob_clear_free(&plaintext_password);
- if (!guest) {
- NTSTATUS nt_status;
- nt_status = pass_check_smb(orig_user, user,
- domain, remote_machine,
- (unsigned char *)smb_apasswd,
- smb_apasslen,
- (unsigned char *)smb_ntpasswd,
- smb_ntpasslen);
-
- if NT_STATUS_IS_OK(nt_status) {
-
- } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
- if ((lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_USER) ||
- (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD)) {
- DEBUG(3,("No such user %s [%s] - using guest account\n",user, domain));
- pstrcpy(user,lp_guestaccount(-1));
- guest = True;
- } else {
- /* Match WinXP and don't give the game away */
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
- } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
- if (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_PASSWORD) {
- pstrcpy(user,lp_guestaccount(-1));
- DEBUG(3,("Registered username %s for guest access\n",user));
- guest = True;
- } else {
- /* Match WinXP and don't give the game away */
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
- } else {
- return ERROR_NT(nt_status);
- }
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ nt_status = do_map_to_guest(nt_status, &server_info, user, domain);
}
- if (!strequal(user,lp_guestaccount(-1)) &&
- lp_servicenumber(user) < 0) {
- add_home_service(user,get_user_home_dir(user));
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ return ERROR_NT(nt_status_squash(nt_status));
}
-
-
+
/* it's ok - setup a reply */
- if (Protocol < PROTOCOL_NT1) {
- set_message(outbuf,3,0,True);
- } else {
- char *p;
- set_message(outbuf,3,0,True);
- p = smb_buf(outbuf);
- p += srvstr_push(outbuf, p, "Unix", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, "Samba", -1, STR_TERMINATE);
- p += srvstr_push(outbuf, p, lp_workgroup(), -1, STR_TERMINATE);
- set_message_end(outbuf,p);
+ set_message(outbuf,3,0,True);
+ if (Protocol >= PROTOCOL_NT1) {
+ char *p = smb_buf( outbuf );
+ p += add_signature( outbuf, p );
+ set_message_end( outbuf, p );
/* perhaps grab OS version here?? */
}
- /* Set the correct uid in the outgoing and incoming packets
- We will use this on future requests to determine which
- user we should become.
- */
- {
- const struct passwd *pw = smb_getpwnam(user,False);
- if (!pw) {
- DEBUG(1,("Username %s is invalid on this system\n",user));
- END_PROFILE(SMBsesssetupX);
- return ERROR_NT(NT_STATUS_LOGON_FAILURE);
- }
- gid = pw->pw_gid;
- uid = pw->pw_uid;
- full_name = pw->pw_gecos;
- }
-
- if (guest)
+ if (server_info->guest) {
SSVAL(outbuf,smb_vwv2,1);
-
+ }
+
/* register the name and uid as being validated, so further connections
to a uid can get through without a password, on the same VC */
-
- sess_vuid = register_vuid(uid,gid,user,orig_user,domain,guest, full_name);
-
+
+ /* register_vuid keeps the server info */
+ sess_vuid = register_vuid(server_info, sub_user);
+
if (sess_vuid == -1) {
return ERROR_NT(NT_STATUS_LOGON_FAILURE);
}
-
SSVAL(outbuf,smb_uid,sess_vuid);
SSVAL(inbuf,smb_uid,sess_vuid);
git.samba.org / sfrench / samba-autobuild / .git / blobdiff