mirror of
https://github.com/samba-team/samba.git
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64ddd381b7
"nss_token" from my point of view much better reflects what this flag actually
represents
(This used to be commit b121a5acb2
)
450 lines
14 KiB
C
450 lines
14 KiB
C
/*
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Unix SMB/CIFS implementation.
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Password and authentication handling
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Copyright (C) Andrew Tridgell 1992-2000
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Copyright (C) Luke Kenneth Casson Leighton 1996-2000
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Copyright (C) Andrew Bartlett 2001-2003
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Copyright (C) Gerald Carter 2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_AUTH
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/****************************************************************************
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Do a specific test for an smb password being correct, given a smb_password and
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the lanman and NT responses.
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****************************************************************************/
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static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
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TALLOC_CTX *mem_ctx,
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struct samu *sampass,
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const auth_usersupplied_info *user_info,
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DATA_BLOB *user_sess_key,
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DATA_BLOB *lm_sess_key)
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{
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uint32 acct_ctrl;
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const uint8 *lm_pw, *nt_pw;
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const char *username = pdb_get_username(sampass);
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acct_ctrl = pdb_get_acct_ctrl(sampass);
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if (acct_ctrl & ACB_PWNOTREQ) {
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if (lp_null_passwords()) {
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DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
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return NT_STATUS_OK;
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} else {
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DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
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return NT_STATUS_LOGON_FAILURE;
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}
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}
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lm_pw = pdb_get_lanman_passwd(sampass);
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nt_pw = pdb_get_nt_passwd(sampass);
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return ntlm_password_check(mem_ctx, &auth_context->challenge,
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&user_info->lm_resp, &user_info->nt_resp,
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&user_info->lm_interactive_pwd, &user_info->nt_interactive_pwd,
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username,
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user_info->smb_name,
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user_info->client_domain,
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lm_pw, nt_pw, user_sess_key, lm_sess_key);
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}
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/****************************************************************************
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Check if a user is allowed to logon at this time. Note this is the
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servers local time, as logon hours are just specified as a weekly
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bitmask.
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****************************************************************************/
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static bool logon_hours_ok(struct samu *sampass)
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{
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/* In logon hours first bit is Sunday from 12AM to 1AM */
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const uint8 *hours;
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struct tm *utctime;
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time_t lasttime;
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const char *asct;
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uint8 bitmask, bitpos;
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hours = pdb_get_hours(sampass);
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if (!hours) {
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DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
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return True;
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}
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lasttime = time(NULL);
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utctime = gmtime(&lasttime);
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if (!utctime) {
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DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
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pdb_get_username(sampass) ));
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return False;
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}
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/* find the corresponding byte and bit */
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bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
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bitmask = 1 << (bitpos % 8);
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if (! (hours[bitpos/8] & bitmask)) {
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struct tm *t = localtime(&lasttime);
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if (!t) {
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asct = "INVALID TIME";
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} else {
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asct = asctime(t);
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if (!asct) {
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asct = "INVALID TIME";
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}
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}
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DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
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"logon at this time (%s).\n",
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pdb_get_username(sampass), asct ));
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return False;
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}
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asct = asctime(utctime);
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DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
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pdb_get_username(sampass), asct ? asct : "UNKNOWN TIME" ));
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return True;
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}
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/****************************************************************************
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Do a specific test for a struct samu being valid for this connection
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(ie not disabled, expired and the like).
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****************************************************************************/
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static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
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struct samu *sampass,
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const auth_usersupplied_info *user_info)
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{
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uint32 acct_ctrl = pdb_get_acct_ctrl(sampass);
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char *workstation_list;
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time_t kickoff_time;
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DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
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/* Quit if the account was disabled. */
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if (acct_ctrl & ACB_DISABLED) {
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DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
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return NT_STATUS_ACCOUNT_DISABLED;
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}
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/* Quit if the account was locked out. */
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if (acct_ctrl & ACB_AUTOLOCK) {
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DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
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return NT_STATUS_ACCOUNT_LOCKED_OUT;
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}
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/* Quit if the account is not allowed to logon at this time. */
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if (! logon_hours_ok(sampass)) {
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return NT_STATUS_INVALID_LOGON_HOURS;
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}
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/* Test account expire time */
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kickoff_time = pdb_get_kickoff_time(sampass);
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if (kickoff_time != 0 && time(NULL) > kickoff_time) {
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DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
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DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
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return NT_STATUS_ACCOUNT_EXPIRED;
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}
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if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP) && !(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ)) {
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time_t must_change_time = pdb_get_pass_must_change_time(sampass);
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time_t last_set_time = pdb_get_pass_last_set_time(sampass);
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/* check for immediate expiry "must change at next logon" */
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if (last_set_time == 0) {
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DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
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return NT_STATUS_PASSWORD_MUST_CHANGE;
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}
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/* check for expired password */
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if (must_change_time < time(NULL) && must_change_time != 0) {
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DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
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DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
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return NT_STATUS_PASSWORD_EXPIRED;
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}
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}
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/* Test workstation. Workstation list is comma separated. */
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workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
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if (!workstation_list)
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return NT_STATUS_NO_MEMORY;
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if (*workstation_list) {
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bool invalid_ws = True;
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char *tok;
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const char *s = workstation_list;
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const char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name);
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if (machine_name == NULL)
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return NT_STATUS_NO_MEMORY;
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while (next_token_talloc(mem_ctx, &s, &tok, ",")) {
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DEBUG(10,("sam_account_ok: checking for workstation match %s and %s\n",
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tok, user_info->wksta_name));
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if(strequal(tok, user_info->wksta_name)) {
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invalid_ws = False;
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break;
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}
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if (tok[0] == '+') {
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DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
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machine_name, tok + 1));
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if (user_in_group(machine_name, tok + 1)) {
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invalid_ws = False;
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break;
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}
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}
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TALLOC_FREE(tok);
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}
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TALLOC_FREE(tok);
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if (invalid_ws)
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return NT_STATUS_INVALID_WORKSTATION;
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}
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if (acct_ctrl & ACB_DOMTRUST) {
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DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
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return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
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}
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if (acct_ctrl & ACB_SVRTRUST) {
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if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
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DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
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return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
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}
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}
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if (acct_ctrl & ACB_WSTRUST) {
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if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
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DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
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return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
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}
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}
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return NT_STATUS_OK;
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}
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/****************************************************************************
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check if a username/password is OK assuming the password is a 24 byte
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SMB hash supplied in the user_info structure
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return an NT_STATUS constant.
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****************************************************************************/
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static NTSTATUS check_sam_security(const struct auth_context *auth_context,
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void *my_private_data,
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TALLOC_CTX *mem_ctx,
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const auth_usersupplied_info *user_info,
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auth_serversupplied_info **server_info)
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{
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struct samu *sampass=NULL;
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bool ret;
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NTSTATUS nt_status;
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NTSTATUS update_login_attempts_status;
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DATA_BLOB user_sess_key = data_blob_null;
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DATA_BLOB lm_sess_key = data_blob_null;
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bool updated_autolock = False, updated_badpw = False;
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if (!user_info || !auth_context) {
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return NT_STATUS_UNSUCCESSFUL;
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}
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/* the returned struct gets kept on the server_info, by means
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of a steal further down */
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if ( !(sampass = samu_new( mem_ctx )) ) {
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return NT_STATUS_NO_MEMORY;
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}
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/* get the account information */
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become_root();
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ret = pdb_getsampwnam(sampass, user_info->internal_username);
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unbecome_root();
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if (ret == False) {
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DEBUG(3,("check_sam_security: Couldn't find user '%s' in "
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"passdb.\n", user_info->internal_username));
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TALLOC_FREE(sampass);
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return NT_STATUS_NO_SUCH_USER;
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}
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/* see if autolock flag needs to be updated */
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if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
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pdb_update_autolock_flag(sampass, &updated_autolock);
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/* Quit if the account was locked out. */
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if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
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DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass)));
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return NT_STATUS_ACCOUNT_LOCKED_OUT;
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}
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nt_status = sam_password_ok(auth_context, mem_ctx, sampass,
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user_info, &user_sess_key, &lm_sess_key);
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/* Notify passdb backend of login success/failure. If not
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NT_STATUS_OK the backend doesn't like the login */
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update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
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if (!NT_STATUS_IS_OK(nt_status)) {
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if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) &&
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pdb_get_acct_ctrl(sampass) &ACB_NORMAL &&
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NT_STATUS_IS_OK(update_login_attempts_status))
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{
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pdb_increment_bad_password_count(sampass);
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updated_badpw = True;
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} else {
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pdb_update_bad_password_count(sampass,
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&updated_badpw);
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}
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if (updated_autolock || updated_badpw){
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become_root();
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if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
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DEBUG(1, ("Failed to modify entry.\n"));
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unbecome_root();
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}
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data_blob_free(&user_sess_key);
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data_blob_free(&lm_sess_key);
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TALLOC_FREE(sampass);
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return nt_status;
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}
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if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) &&
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(pdb_get_bad_password_count(sampass) > 0)){
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pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
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pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
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updated_badpw = True;
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}
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if (updated_autolock || updated_badpw){
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become_root();
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if(!NT_STATUS_IS_OK(pdb_update_sam_account(sampass)))
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DEBUG(1, ("Failed to modify entry.\n"));
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unbecome_root();
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}
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nt_status = sam_account_ok(mem_ctx, sampass, user_info);
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if (!NT_STATUS_IS_OK(nt_status)) {
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TALLOC_FREE(sampass);
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data_blob_free(&user_sess_key);
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data_blob_free(&lm_sess_key);
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return nt_status;
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}
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become_root();
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nt_status = make_server_info_sam(server_info, sampass);
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unbecome_root();
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if (!NT_STATUS_IS_OK(nt_status)) {
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DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
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data_blob_free(&user_sess_key);
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data_blob_free(&lm_sess_key);
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return nt_status;
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}
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(*server_info)->user_session_key =
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data_blob_talloc(*server_info, user_sess_key.data,
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user_sess_key.length);
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data_blob_free(&user_sess_key);
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(*server_info)->lm_session_key =
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data_blob_talloc(*server_info, lm_sess_key.data,
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lm_sess_key.length);
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data_blob_free(&lm_sess_key);
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(*server_info)->nss_token |= user_info->was_mapped;
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return nt_status;
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}
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/* module initialisation */
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static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
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{
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if (!make_auth_methods(auth_context, auth_method)) {
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return NT_STATUS_NO_MEMORY;
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}
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(*auth_method)->auth = check_sam_security;
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(*auth_method)->name = "sam_ignoredomain";
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return NT_STATUS_OK;
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}
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/****************************************************************************
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Check SAM security (above) but with a few extra checks.
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****************************************************************************/
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static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
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void *my_private_data,
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TALLOC_CTX *mem_ctx,
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const auth_usersupplied_info *user_info,
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auth_serversupplied_info **server_info)
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{
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bool is_local_name, is_my_domain;
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if (!user_info || !auth_context) {
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return NT_STATUS_LOGON_FAILURE;
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}
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is_local_name = is_myname(user_info->domain);
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is_my_domain = strequal(user_info->domain, lp_workgroup());
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/* check whether or not we service this domain/workgroup name */
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switch ( lp_server_role() ) {
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case ROLE_STANDALONE:
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case ROLE_DOMAIN_MEMBER:
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if ( !is_local_name ) {
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DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
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user_info->domain, (lp_server_role() == ROLE_DOMAIN_MEMBER
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? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
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return NT_STATUS_NOT_IMPLEMENTED;
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}
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case ROLE_DOMAIN_PDC:
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case ROLE_DOMAIN_BDC:
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if ( !is_local_name && !is_my_domain ) {
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DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
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user_info->domain));
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return NT_STATUS_NOT_IMPLEMENTED;
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}
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default: /* name is ok */
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break;
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}
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return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
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}
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/* module initialisation */
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static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
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{
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if (!make_auth_methods(auth_context, auth_method)) {
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return NT_STATUS_NO_MEMORY;
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}
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(*auth_method)->auth = check_samstrict_security;
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(*auth_method)->name = "sam";
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return NT_STATUS_OK;
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}
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NTSTATUS auth_sam_init(void)
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{
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smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
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smb_register_auth(AUTH_INTERFACE_VERSION, "sam_ignoredomain", auth_init_sam_ignoredomain);
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return NT_STATUS_OK;
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}
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