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|
/*
* Unix SMB/Netbios implementation.
* Version 1.9.
* RPC Pipe client / server routines
* Copyright (C) Andrew Tridgell 1992-1997,
* Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
* Copyright (C) Paul Ashton 1997.
* Copyright (C) Jeremy Allison 1998-2001.
*
* 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.
*/
/* This is the implementation of the netlogon pipe. */
#include "includes.h"
extern int DEBUGLEVEL;
extern BOOL sam_logon_in_ssb;
extern pstring samlogon_user;
extern pstring global_myname;
extern DOM_SID global_sam_sid;
/*************************************************************************
init_net_r_req_chal:
*************************************************************************/
static void init_net_r_req_chal(NET_R_REQ_CHAL *r_c,
DOM_CHAL *srv_chal, int status)
{
DEBUG(6,("init_net_r_req_chal: %d\n", __LINE__));
memcpy(r_c->srv_chal.data, srv_chal->data, sizeof(srv_chal->data));
r_c->status = status;
}
/*************************************************************************
error messages cropping up when using nltest.exe...
*************************************************************************/
#define ERROR_NO_SUCH_DOMAIN 0x54b
#define ERROR_NO_LOGON_SERVERS 0x51f
/*************************************************************************
net_reply_logon_ctrl:
*************************************************************************/
/* Some flag values reverse engineered from NLTEST.EXE */
#define LOGON_CTRL_IN_SYNC 0x00
#define LOGON_CTRL_REPL_NEEDED 0x01
#define LOGON_CTRL_REPL_IN_PROGRESS 0x02
uint32 _net_logon_ctrl(pipes_struct *p, NET_Q_LOGON_CTRL *q_u,
NET_R_LOGON_CTRL *r_u)
{
uint32 flags = 0x0;
uint32 pdc_connection_status = 0x00; /* Maybe a win32 error code? */
/* Setup the Logon Control response */
init_net_r_logon_ctrl(r_u, q_u->query_level, flags,
pdc_connection_status);
return r_u->status;
}
/*************************************************************************
net_reply_logon_ctrl2:
*************************************************************************/
uint32 _net_logon_ctrl2(pipes_struct *p, NET_Q_LOGON_CTRL2 *q_u, NET_R_LOGON_CTRL2 *r_u)
{
/* lkclXXXX - guess what - absolutely no idea what these are! */
uint32 flags = 0x0;
uint32 pdc_connection_status = 0x0;
uint32 logon_attempts = 0x0;
uint32 tc_status = ERROR_NO_LOGON_SERVERS;
char *trusted_domain = "test_domain";
DEBUG(6,("_net_logon_ctrl2: %d\n", __LINE__));
/* set up the Logon Control2 response */
init_net_r_logon_ctrl2(r_u, q_u->query_level,
flags, pdc_connection_status, logon_attempts,
tc_status, trusted_domain);
DEBUG(6,("_net_logon_ctrl2: %d\n", __LINE__));
return r_u->status;
}
/*************************************************************************
net_reply_trust_dom_list:
*************************************************************************/
uint32 _net_trust_dom_list(pipes_struct *p, NET_Q_TRUST_DOM_LIST *q_u, NET_R_TRUST_DOM_LIST *r_u)
{
char *trusted_domain = "test_domain";
uint32 num_trust_domains = 1;
DEBUG(6,("_net_trust_dom_list: %d\n", __LINE__));
/* set up the Trusted Domain List response */
init_r_trust_dom(r_u, num_trust_domains, trusted_domain);
DEBUG(6,("_net_trust_dom_list: %d\n", __LINE__));
return r_u->status;
}
/***********************************************************************************
init_net_r_srv_pwset:
***********************************************************************************/
static void init_net_r_srv_pwset(NET_R_SRV_PWSET *r_s,
DOM_CRED *srv_cred, int status)
{
DEBUG(5,("init_net_r_srv_pwset: %d\n", __LINE__));
memcpy(&r_s->srv_cred, srv_cred, sizeof(r_s->srv_cred));
r_s->status = status;
DEBUG(5,("init_net_r_srv_pwset: %d\n", __LINE__));
}
/******************************************************************
gets a machine password entry. checks access rights of the host.
******************************************************************/
static BOOL get_md4pw(char *md4pw, char *mach_acct)
{
SAM_ACCOUNT *sampass = NULL;
uint8 *pass;
BOOL ret;
#if 0
/*
* Currently this code is redundent as we already have a filter
* by hostname list. What this code really needs to do is to
* get a hosts allowed/hosts denied list from the SAM database
* on a per user basis, and make the access decision there.
* I will leave this code here for now as a reminder to implement
* this at a later date. JRA.
*/
if (!allow_access(lp_domain_hostsdeny(), lp_domain_hostsallow(),
client_name(), client_addr()))
{
DEBUG(0,("get_md4pw: Workstation %s denied access to domain\n", mach_acct));
return False;
}
#endif /* 0 */
if(!pdb_init_sam(&sampass))
return False;
/* JRA. This is ok as it is only used for generating the challenge. */
become_root();
ret=pdb_getsampwnam(sampass, mach_acct);
unbecome_root();
if (ret==False) {
DEBUG(0,("get_md4pw: Workstation %s: no account in domain\n", mach_acct));
pdb_free_sam(sampass);
return False;
}
if (!(pdb_get_acct_ctrl(sampass) & ACB_DISABLED) && ((pass=pdb_get_nt_passwd(sampass)) != NULL)) {
memcpy(md4pw, pass, 16);
dump_data(5, md4pw, 16);
pdb_free_sam(sampass);
return True;
}
DEBUG(0,("get_md4pw: Workstation %s: no account in domain\n", mach_acct));
pdb_free_sam(sampass);
return False;
}
/*************************************************************************
_net_req_chal
*************************************************************************/
uint32 _net_req_chal(pipes_struct *p, NET_Q_REQ_CHAL *q_u, NET_R_REQ_CHAL *r_u)
{
uint32 status = NT_STATUS_NOPROBLEMO;
fstring mach_acct;
if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER;
rpcstr_pull(mach_acct,q_u->uni_logon_clnt.buffer,sizeof(fstring),q_u->uni_logon_clnt.uni_str_len*2,0);
strlower(mach_acct);
fstrcat(mach_acct, "$");
if (get_md4pw((char *)p->dc.md4pw, mach_acct)) {
/* copy the client credentials */
memcpy(p->dc.clnt_chal.data , q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
memcpy(p->dc.clnt_cred.challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
/* create a server challenge for the client */
/* Set these to random values. */
generate_random_buffer(p->dc.srv_chal.data, 8, False);
memcpy(p->dc.srv_cred.challenge.data, p->dc.srv_chal.data, 8);
memset((char *)p->dc.sess_key, '\0', sizeof(p->dc.sess_key));
/* from client / server challenges and md4 password, generate sess key */
cred_session_key(&p->dc.clnt_chal, &p->dc.srv_chal,
(char *)p->dc.md4pw, p->dc.sess_key);
/* Save the machine account name. */
fstrcpy(p->dc.mach_acct, mach_acct);
} else {
/* lkclXXXX take a guess at a good error message to return :-) */
status = NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
}
/* set up the LSA REQUEST CHALLENGE response */
init_net_r_req_chal(r_u, &p->dc.srv_chal, status);
return r_u->status;
}
/*************************************************************************
init_net_r_auth:
*************************************************************************/
static void init_net_r_auth(NET_R_AUTH *r_a, DOM_CHAL *resp_cred, int status)
{
memcpy(r_a->srv_chal.data, resp_cred->data, sizeof(resp_cred->data));
r_a->status = status;
}
/*************************************************************************
_net_auth
*************************************************************************/
uint32 _net_auth(pipes_struct *p, NET_Q_AUTH *q_u, NET_R_AUTH *r_u)
{
uint32 status = NT_STATUS_NOPROBLEMO;
DOM_CHAL srv_cred;
UTIME srv_time;
if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER;
srv_time.time = 0;
/* check that the client credentials are valid */
if (cred_assert(&q_u->clnt_chal, p->dc.sess_key, &p->dc.clnt_cred.challenge, srv_time)) {
/* create server challenge for inclusion in the reply */
cred_create(p->dc.sess_key, &p->dc.srv_cred.challenge, srv_time, &srv_cred);
/* copy the received client credentials for use next time */
memcpy(p->dc.clnt_cred.challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
memcpy(p->dc.srv_cred .challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
} else {
status = NT_STATUS_ACCESS_DENIED;
}
/* set up the LSA AUTH 2 response */
init_net_r_auth(r_u, &srv_cred, status);
return r_u->status;
}
/*************************************************************************
init_net_r_auth_2:
*************************************************************************/
static void init_net_r_auth_2(NET_R_AUTH_2 *r_a,
DOM_CHAL *resp_cred, NEG_FLAGS *flgs, int status)
{
memcpy(r_a->srv_chal.data, resp_cred->data, sizeof(resp_cred->data));
memcpy(&r_a->srv_flgs, flgs, sizeof(r_a->srv_flgs));
r_a->status = status;
}
/*************************************************************************
_net_auth_2
*************************************************************************/
uint32 _net_auth_2(pipes_struct *p, NET_Q_AUTH_2 *q_u, NET_R_AUTH_2 *r_u)
{
uint32 status = NT_STATUS_NOPROBLEMO;
DOM_CHAL srv_cred;
UTIME srv_time;
NEG_FLAGS srv_flgs;
if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER;
srv_time.time = 0;
/* check that the client credentials are valid */
if (cred_assert(&q_u->clnt_chal, p->dc.sess_key, &p->dc.clnt_cred.challenge, srv_time)) {
/* create server challenge for inclusion in the reply */
cred_create(p->dc.sess_key, &p->dc.srv_cred.challenge, srv_time, &srv_cred);
/* copy the received client credentials for use next time */
memcpy(p->dc.clnt_cred.challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
memcpy(p->dc.srv_cred .challenge.data, q_u->clnt_chal.data, sizeof(q_u->clnt_chal.data));
} else {
status = NT_STATUS_ACCESS_DENIED;
}
srv_flgs.neg_flags = 0x000001ff;
/* set up the LSA AUTH 2 response */
init_net_r_auth_2(r_u, &srv_cred, &srv_flgs, status);
return r_u->status;
}
/*************************************************************************
_net_srv_pwset
*************************************************************************/
uint32 _net_srv_pwset(pipes_struct *p, NET_Q_SRV_PWSET *q_u, NET_R_SRV_PWSET *r_u)
{
uint32 status = NT_STATUS_WRONG_PASSWORD;
DOM_CRED srv_cred;
pstring mach_acct;
SAM_ACCOUNT *sampass=NULL;
BOOL ret = False;
unsigned char pwd[16];
int i;
if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER;
/* checks and updates credentials. creates reply credentials */
if (!deal_with_creds(p->dc.sess_key, &p->dc.clnt_cred, &q_u->clnt_id.cred, &srv_cred))
return NT_STATUS_INVALID_HANDLE;
memcpy(&p->dc.srv_cred, &p->dc.clnt_cred, sizeof(p->dc.clnt_cred));
DEBUG(5,("_net_srv_pwset: %d\n", __LINE__));
rpcstr_pull(mach_acct,q_u->clnt_id.login.uni_acct_name.buffer,
sizeof(mach_acct),q_u->clnt_id.login.uni_acct_name.uni_str_len*2,0);
DEBUG(3,("Server Password Set Wksta:[%s]\n", mach_acct));
pdb_init_sam(&sampass);
become_root();
ret=pdb_getsampwnam(sampass, mach_acct);
unbecome_root();
/* Ensure the account exists and is a machine account. */
if (ret==False || !(pdb_get_acct_ctrl(sampass) & ACB_WSTRUST)) {
pdb_free_sam(sampass);
return NT_STATUS_NO_SUCH_USER;
}
/*
* Check the machine account name we're changing is the same
* as the one we've authenticated from. This prevents arbitrary
* machines changing other machine account passwords.
*/
if (!strequal(mach_acct, p->dc.mach_acct)) {
pdb_free_sam(sampass);
return NT_STATUS_ACCESS_DENIED;
}
DEBUG(100,("Server password set : new given value was :\n"));
for(i = 0; i < 16; i++)
DEBUG(100,("%02X ", q_u->pwd[i]));
DEBUG(100,("\n"));
cred_hash3( pwd, q_u->pwd, p->dc.sess_key, 0);
/* lies! nt and lm passwords are _not_ the same: don't care */
pdb_set_lanman_passwd (sampass, pwd);
pdb_set_nt_passwd (sampass, pwd);
pdb_set_acct_ctrl (sampass, ACB_WSTRUST);
become_root();
ret = pdb_update_sam_account (sampass,False);
unbecome_root();
if (ret)
status = NT_STATUS_NOPROBLEMO;
/* set up the LSA Server Password Set response */
init_net_r_srv_pwset(r_u, &srv_cred, status);
pdb_free_sam(sampass);
return r_u->status;
}
/*************************************************************************
_net_sam_logoff:
*************************************************************************/
uint32 _net_sam_logoff(pipes_struct *p, NET_Q_SAM_LOGOFF *q_u, NET_R_SAM_LOGOFF *r_u)
{
DOM_CRED srv_cred;
if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER;
/* checks and updates credentials. creates reply credentials */
if (!deal_with_creds(p->dc.sess_key, &p->dc.clnt_cred,
&q_u->sam_id.client.cred, &srv_cred))
return NT_STATUS_INVALID_HANDLE;
memcpy(&p->dc.srv_cred, &p->dc.clnt_cred, sizeof(p->dc.clnt_cred));
/* XXXX maybe we want to say 'no', reject the client's credentials */
r_u->buffer_creds = 1; /* yes, we have valid server credentials */
memcpy(&r_u->srv_creds, &srv_cred, sizeof(r_u->srv_creds));
r_u->status = NT_STATUS_NOPROBLEMO;
return r_u->status;
}
/*************************************************************************
_net_logon_any: Use the new authentications subsystem to log in.
*************************************************************************/
static uint32 _net_logon_any(NET_ID_INFO_CTR *ctr, char *user, char *domain, char *sess_key)
{
uint32 nt_status = NT_STATUS_LOGON_FAILURE;
unsigned char local_lm_response[24];
unsigned char local_nt_response[24];
auth_usersupplied_info user_info;
auth_serversupplied_info server_info;
AUTH_STR ourdomain, theirdomain, smb_username, wksta_name;
DEBUG(5, ("_net_logon_any: entered with user %s and domain %s\n", user, domain));
ZERO_STRUCT(user_info);
ZERO_STRUCT(server_info);
ZERO_STRUCT(ourdomain);
ZERO_STRUCT(theirdomain);
ZERO_STRUCT(smb_username);
ZERO_STRUCT(wksta_name);
ourdomain.str = lp_workgroup();
ourdomain.len = strlen(ourdomain.str);
theirdomain.str = domain;
theirdomain.len = strlen(theirdomain.str);
user_info.requested_domain = theirdomain;
user_info.domain = ourdomain;
smb_username.str = user;
smb_username.len = strlen(smb_username.str);
user_info.requested_username = smb_username; /* For the time-being */
user_info.smb_username = smb_username;
#if 0
user_info.wksta_name.str = cleint_name();
user_info.wksta_name.len = strlen(client_name());
user_info.wksta_name = wksta_name;
#endif
DEBUG(10,("_net_logon_any: Attempting validation level %d.\n", ctr->switch_value));
switch (ctr->switch_value) {
case NET_LOGON_TYPE:
/* Standard challange/response authenticaion */
user_info.lm_resp.buffer = (uint8 *)ctr->auth.id2.lm_chal_resp.buffer;
user_info.lm_resp.len = ctr->auth.id2.lm_chal_resp.str_str_len;
user_info.nt_resp.buffer = (uint8 *)ctr->auth.id2.nt_chal_resp.buffer;
user_info.nt_resp.len = ctr->auth.id2.nt_chal_resp.str_str_len;
memcpy(user_info.chal, ctr->auth.id2.lm_chal, 8);
break;
case INTERACTIVE_LOGON_TYPE:
/* 'Interactive' autheticaion, supplies the password in its MD4 form, encrypted
with the session key. We will convert this to challange/responce for the
auth subsystem to chew on */
{
char nt_pwd[16];
char lm_pwd[16];
unsigned char key[16];
memset(key, 0, 16);
memcpy(key, sess_key, 8);
memcpy(lm_pwd, ctr->auth.id1.lm_owf.data, 16);
memcpy(nt_pwd, ctr->auth.id1.nt_owf.data, 16);
#ifdef DEBUG_PASSWORD
DEBUG(100,("key:"));
dump_data(100, (char *)key, 16);
DEBUG(100,("lm owf password:"));
dump_data(100, lm_pwd, 16);
DEBUG(100,("nt owf password:"));
dump_data(100, nt_pwd, 16);
#endif
SamOEMhash((uchar *)lm_pwd, key, 16);
SamOEMhash((uchar *)nt_pwd, key, 16);
#ifdef DEBUG_PASSWORD
DEBUG(100,("decrypt of lm owf password:"));
dump_data(100, lm_pwd, 16);
DEBUG(100,("decrypt of nt owf password:"));
dump_data(100, nt_pwd, 16);
#endif
generate_random_buffer(user_info.chal, 8, False);
SMBOWFencrypt(lm_pwd, user_info.chal, local_lm_response);
SMBOWFencrypt(nt_pwd, user_info.chal, local_nt_response);
user_info.lm_resp.buffer = (uint8 *)local_lm_response;
user_info.lm_resp.len = 24;
user_info.nt_resp.buffer = (uint8 *)local_nt_response;
user_info.nt_resp.len = 24;
break;
}
default:
DEBUG(2,("SAM Logon: unsupported switch value\n"));
return NT_STATUS_INVALID_INFO_CLASS;
} /* end switch */
nt_status = check_password(&user_info, &server_info);
DEBUG(5, ("_net_logon_any: exited with status %d\n", nt_status));
return nt_status;
}
/*************************************************************************
_net_sam_logon
*************************************************************************/
uint32 _net_sam_logon(pipes_struct *p, NET_Q_SAM_LOGON *q_u, NET_R_SAM_LOGON *r_u)
{
uint32 status = NT_STATUS_NOPROBLEMO;
NET_USER_INFO_3 *usr_info = NULL;
DOM_CRED srv_cred;
SAM_ACCOUNT *sampass = NULL;
UNISTR2 *uni_samlogon_user = NULL;
UNISTR2 *uni_samlogon_domain = NULL;
fstring nt_username;
fstring nt_domain;
BOOL ret;
usr_info = (NET_USER_INFO_3 *)talloc(p->mem_ctx, sizeof(NET_USER_INFO_3));
if (!usr_info)
return NT_STATUS_NO_MEMORY;
ZERO_STRUCTP(usr_info);
if (!get_valid_user_struct(p->vuid))
return NT_STATUS_NO_SUCH_USER;
/* checks and updates credentials. creates reply credentials */
if (!deal_with_creds(p->dc.sess_key, &p->dc.clnt_cred, &q_u->sam_id.client.cred, &srv_cred))
return NT_STATUS_INVALID_HANDLE;
else
memcpy(&p->dc.srv_cred, &p->dc.clnt_cred, sizeof(p->dc.clnt_cred));
r_u->buffer_creds = 1; /* yes, we have valid server credentials */
memcpy(&r_u->srv_creds, &srv_cred, sizeof(r_u->srv_creds));
/* store the user information, if there is any. */
r_u->user = usr_info;
r_u->switch_value = 0; /* indicates no info */
r_u->auth_resp = 1; /* authoritative response */
r_u->switch_value = 3; /* indicates type of validation user info */
/* find the username */
switch (q_u->sam_id.logon_level) {
case INTERACTIVE_LOGON_TYPE:
uni_samlogon_user = &q_u->sam_id.ctr->auth.id1.uni_user_name;
uni_samlogon_domain = &q_u->sam_id.ctr->auth.id1.uni_domain_name;
DEBUG(3,("SAM Logon (Interactive). Domain:[%s]. ", lp_workgroup()));
break;
case NET_LOGON_TYPE:
uni_samlogon_user = &q_u->sam_id.ctr->auth.id2.uni_user_name;
uni_samlogon_domain = &q_u->sam_id.ctr->auth.id2.uni_domain_name;
DEBUG(3,("SAM Logon (Network). Domain:[%s]. ", lp_workgroup()));
break;
default:
DEBUG(2,("SAM Logon: unsupported switch value\n"));
return NT_STATUS_INVALID_INFO_CLASS;
} /* end switch */
/* check username exists */
rpcstr_pull(nt_username,uni_samlogon_user->buffer,sizeof(nt_username),uni_samlogon_user->uni_str_len*2,0);
rpcstr_pull(nt_domain,uni_samlogon_domain->buffer,sizeof(nt_domain),uni_samlogon_domain->uni_str_len*2,0);
DEBUG(3,("User:[%s] Requested Domain:[%s]\n", nt_username, nt_domain));
/*
* Convert to a UNIX username.
*/
map_username(nt_username);
DEBUG(10,("Attempting validation level %d for mapped username %s.\n", q_u->sam_id.ctr->switch_value, nt_username));
status = _net_logon_any(q_u->sam_id.ctr, nt_username, nt_domain, p->dc.sess_key);
/* Check account and password */
if (status != NT_STATUS_NOPROBLEMO)
return status;
pdb_init_sam(&sampass);
/* get the account information */
become_root();
ret = pdb_getsampwnam(sampass, nt_username);
unbecome_root();
if (ret == False){
pdb_free_sam(sampass);
return NT_STATUS_NO_SUCH_USER;
}
/* lkclXXXX this is the point at which, if the login was
successful, that the SAM Local Security Authority should
record that the user is logged in to the domain.
*/
{
DOM_GID *gids = NULL;
int num_gids = 0;
pstring my_name;
pstring my_workgroup;
pstring domain_groups;
/* set up pointer indicating user/password failed to be found */
usr_info->ptr_user_info = 0;
/* XXXX hack to get standard_sub_basic() to use sam logon username */
/* possibly a better way would be to do a become_user() call */
sam_logon_in_ssb = True;
pstrcpy(samlogon_user, nt_username);
pstrcpy(my_workgroup, lp_workgroup());
pstrcpy(my_name, global_myname);
strupper(my_name);
/*
* This is the point at which we get the group
* database - we should be getting the gid_t list
* from /etc/group and then turning the uids into
* rids and then into machine sids for this user.
* JRA.
*/
get_domain_user_groups(domain_groups, nt_username);
/*
* make_dom_gids allocates the gids array. JRA.
*/
gids = NULL;
num_gids = make_dom_gids(p->mem_ctx, domain_groups, &gids);
sam_logon_in_ssb = False;
init_net_user_info3(p->mem_ctx, usr_info, sampass,
0, /* logon_count */
0, /* bad_pw_count */
num_gids, /* uint32 num_groups */
gids , /* DOM_GID *gids */
0x20 , /* uint32 user_flgs (?) */
NULL, /* char sess_key[16] */
my_name , /* char *logon_srv */
my_workgroup, /* char *logon_dom */
&global_sam_sid, /* DOM_SID *dom_sid */
NULL); /* char *other_sids */
}
pdb_free_sam(sampass);
return status;
}
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