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/*
Unix SMB/Netbios implementation.
Version 3.0
Winbind daemon - pam auuth funcions
Copyright (C) Andrew Tridgell 2000
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 "winbindd.h"
extern pstring global_myname;
/* Copy of parse_domain_user from winbindd_util.c. Parse a string of the
form DOMAIN/user into a domain and a user */
static void parse_domain_user(char *domuser, fstring domain, fstring user)
{
char *p;
char *sep = lp_winbind_separator();
if (!sep) sep = "\\";
p = strchr(domuser,*sep);
if (!p) p = strchr(domuser,'\\');
if (!p) {
fstrcpy(domain,"");
fstrcpy(user, domuser);
return;
}
fstrcpy(user, p+1);
fstrcpy(domain, domuser);
domain[PTR_DIFF(p, domuser)] = 0;
strupper(domain);
}
/* Return a password structure from a username. Specify whether cached data
can be returned. */
enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
{
BOOL result;
fstring name_domain, name_user;
int passlen;
unsigned char trust_passwd[16];
time_t last_change_time;
unsigned char local_lm_response[24];
unsigned char local_nt_response[24];
auth_usersupplied_info user_info;
auth_serversupplied_info server_info;
AUTH_STR theirdomain, smb_username, wksta_name;
DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
state->request.data.auth.user));
/* Parse domain and username */
parse_domain_user(state->request.data.auth.user, name_domain,
name_user);
/* don't allow the null domain */
if (strcmp(name_domain,"") == 0)
return WINBINDD_ERROR;
passlen = strlen(state->request.data.auth.pass);
ZERO_STRUCT(user_info);
ZERO_STRUCT(theirdomain);
ZERO_STRUCT(smb_username);
ZERO_STRUCT(wksta_name);
theirdomain.str = name_domain;
theirdomain.len = strlen(theirdomain.str);
user_info.requested_domain = theirdomain;
user_info.domain = theirdomain;
user_info.smb_username.str = name_user;
user_info.smb_username.len = strlen(name_user);
user_info.requested_username.str = name_user;
user_info.requested_username.len = strlen(name_user);
user_info.wksta_name.str = global_myname;
user_info.wksta_name.len = strlen(user_info.wksta_name.str);
user_info.wksta_name = wksta_name;
generate_random_buffer( user_info.chal, 8, False);
if (state->request.data.auth.pass) {
SMBencrypt((uchar *)state->request.data.auth.pass, user_info.chal, local_lm_response);
user_info.lm_resp.buffer = (uint8 *)local_lm_response;
user_info.lm_resp.len = 24;
SMBNTencrypt((uchar *)state->request.data.auth.pass, user_info.chal, local_nt_response);
user_info.nt_resp.buffer = (uint8 *)local_nt_response;
user_info.nt_resp.len = 24;
} else {
return WINBINDD_ERROR;
}
/*
* Get the machine account password for our primary domain
*/
if (!secrets_fetch_trust_account_password(lp_workgroup(), trust_passwd, &last_change_time))
{
DEBUG(0, ("winbindd_pam_auth: could not fetch trust account password for domain %s\n", lp_workgroup()));
return WINBINDD_ERROR;
}
/* So domain_client_validate() actually opens a new connection
for each authentication performed. This can theoretically
be optimised to use an already open IPC$ connection. */
result = (domain_client_validate(&user_info, &server_info,
server_state.controller, trust_passwd,
last_change_time) == NT_STATUS_NOPROBLEMO);
return result ? WINBINDD_OK : WINBINDD_ERROR;
}
/* Change a user password */
enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
{
char *oldpass, *newpass;
fstring domain, user;
uchar nt_oldhash[16];
uchar lm_oldhash[16];
DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
state->request.data.chauthtok.user));
/* Setup crap */
if (state == NULL) return WINBINDD_ERROR;
parse_domain_user(state->request.data.chauthtok.user, domain, user);
oldpass = state->request.data.chauthtok.oldpass;
newpass = state->request.data.chauthtok.newpass;
nt_lm_owf_gen(oldpass, nt_oldhash, lm_oldhash);
/* Change password */
#if 0
/* XXX */
if (!msrpc_sam_ntchange_pwd(server_state.controller, domain, user,
lm_oldhash, nt_oldhash, newpass)) {
DEBUG(0, ("password change failed for user %s/%s\n", domain, user));
return WINBINDD_ERROR;
}
#endif
return WINBINDD_OK;
}
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