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/*
Unix SMB/CIFS implementation.
Password and authentication handling
Copyright (C) Andrew Bartlett 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../librpc/gen_ndr/samr.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/**
* update the encrypted smbpasswd file from the plaintext username and password
*
* this ugly hack needs to die, but not quite yet, I think people still use it...
**/
static bool update_smbpassword_file(const char *user, const char *password)
{
struct samu *sampass;
bool ret;
if ( !(sampass = samu_new( NULL )) ) {
return False;
}
become_root();
ret = pdb_getsampwnam(sampass, user);
unbecome_root();
if(ret == False) {
DEBUG(0,("pdb_getsampwnam returned NULL\n"));
TALLOC_FREE(sampass);
return False;
}
/*
* Remove the account disabled flag - we are updating the
* users password from a login.
*/
if (!pdb_set_acct_ctrl(sampass, pdb_get_acct_ctrl(sampass) & ~ACB_DISABLED, PDB_CHANGED)) {
TALLOC_FREE(sampass);
return False;
}
if (!pdb_set_plaintext_passwd (sampass, password)) {
TALLOC_FREE(sampass);
return False;
}
/* Now write it into the file. */
become_root();
ret = NT_STATUS_IS_OK(pdb_update_sam_account (sampass));
unbecome_root();
if (ret) {
DEBUG(3,("pdb_update_sam_account returned %d\n",ret));
}
TALLOC_FREE(sampass);
return ret;
}
/** Check a plaintext username/password
*
* Cannot deal with an encrupted password in any manner whatsoever,
* unless the account has a null password.
**/
static NTSTATUS check_unix_security(const struct auth_context *auth_context,
void *my_private_data,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info,
struct auth_serversupplied_info **server_info)
{
NTSTATUS nt_status;
struct passwd *pass = NULL;
DEBUG(10, ("Check auth for: [%s]\n", user_info->mapped.account_name));
become_root();
pass = Get_Pwnam_alloc(talloc_tos(), user_info->mapped.account_name);
/** @todo This call assumes a ASCII password, no charset transformation is
done. We may need to revisit this **/
nt_status = pass_check(pass,
pass ? pass->pw_name : user_info->mapped.account_name,
user_info->password.plaintext,
lp_update_encrypted() ?
update_smbpassword_file : NULL,
True);
unbecome_root();
if (NT_STATUS_IS_OK(nt_status)) {
if (pass) {
/* if a real user check pam account restrictions */
/* only really perfomed if "obey pam restriction" is true */
nt_status = smb_pam_accountcheck(pass->pw_name);
if ( !NT_STATUS_IS_OK(nt_status)) {
DEBUG(1, ("PAM account restriction prevents user login\n"));
} else {
make_server_info_pw(server_info, pass->pw_name, pass);
}
} else {
/* we need to do somthing more useful here */
nt_status = NT_STATUS_NO_SUCH_USER;
}
}
TALLOC_FREE(pass);
return nt_status;
}
/* module initialisation */
static NTSTATUS auth_init_unix(struct auth_context *auth_context, const char* param, auth_methods **auth_method)
{
struct auth_methods *result;
result = TALLOC_ZERO_P(auth_context, struct auth_methods);
if (result == NULL) {
return NT_STATUS_NO_MEMORY;
}
result->name = "unix";
result->auth = check_unix_security;
*auth_method = result;
return NT_STATUS_OK;
}
NTSTATUS auth_unix_init(void)
{
return smb_register_auth(AUTH_INTERFACE_VERSION, "unix", auth_init_unix);
}
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