--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+ Password and authentication handling
+ Copyright (C) Andrew Tridgell 1992-2000
+ Copyright (C) Luke Kenneth Casson Leighton 1996-2000
+ Copyright (C) Andrew Bartlett 2001-2003
+ Copyright (C) Gerald Carter 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
+ 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 "includes.h"
+
+extern struct timeval smb_last_time;
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_AUTH
+
+/****************************************************************************
+ Do a specific test for an smb password being correct, given a smb_password and
+ the lanman and NT responses.
+****************************************************************************/
+
+static NTSTATUS sam_password_ok(const struct auth_context *auth_context,
+ TALLOC_CTX *mem_ctx,
+ SAM_ACCOUNT *sampass,
+ const auth_usersupplied_info *user_info,
+ DATA_BLOB *user_sess_key,
+ DATA_BLOB *lm_sess_key)
+{
+ uint16 acct_ctrl;
+ const uint8 *lm_pw, *nt_pw;
+ const char *username = pdb_get_username(sampass);
+
+ acct_ctrl = pdb_get_acct_ctrl(sampass);
+ if (acct_ctrl & ACB_PWNOTREQ) {
+ if (lp_null_passwords()) {
+ DEBUG(3,("Account for user '%s' has no password and null passwords are allowed.\n", username));
+ return NT_STATUS_OK;
+ } else {
+ DEBUG(3,("Account for user '%s' has no password and null passwords are NOT allowed.\n", username));
+ return NT_STATUS_LOGON_FAILURE;
+ }
+ }
+
+ lm_pw = pdb_get_lanman_passwd(sampass);
+ nt_pw = pdb_get_nt_passwd(sampass);
+
+ return ntlm_password_check(mem_ctx, &auth_context->challenge,
+ &user_info->lm_resp, &user_info->nt_resp,
+ &user_info->lm_interactive_pwd, &user_info->nt_interactive_pwd,
+ username,
+ user_info->smb_name.str,
+ user_info->client_domain.str,
+ lm_pw, nt_pw, user_sess_key, lm_sess_key);
+}
+
+/****************************************************************************
+ Check if a user is allowed to logon at this time. Note this is the
+ servers local time, as logon hours are just specified as a weekly
+ bitmask.
+****************************************************************************/
+
+static BOOL logon_hours_ok(SAM_ACCOUNT *sampass)
+{
+ /* In logon hours first bit is Sunday from 12AM to 1AM */
+ const uint8 *hours;
+ struct tm *utctime;
+ time_t lasttime;
+ uint8 bitmask, bitpos;
+
+ hours = pdb_get_hours(sampass);
+ if (!hours) {
+ DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n",pdb_get_username(sampass)));
+ return True;
+ }
+
+ lasttime = (time_t)smb_last_time.tv_sec;
+ utctime = gmtime(&lasttime);
+
+ /* find the corresponding byte and bit */
+ bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
+ bitmask = 1 << (bitpos % 8);
+
+ if (! (hours[bitpos/8] & bitmask)) {
+ DEBUG(1,("logon_hours_ok: Account for user %s not allowed to logon at this time (%s).\n",
+ pdb_get_username(sampass),
+ asctime(localtime(&lasttime)) ));
+ return False;
+ }
+
+ DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
+ pdb_get_username(sampass), asctime(utctime) ));
+
+ return True;
+}
+
+/****************************************************************************
+ Do a specific test for a SAM_ACCOUNT being vaild for this connection
+ (ie not disabled, expired and the like).
+****************************************************************************/
+
+static NTSTATUS sam_account_ok(TALLOC_CTX *mem_ctx,
+ SAM_ACCOUNT *sampass,
+ const auth_usersupplied_info *user_info)
+{
+ uint16 acct_ctrl = pdb_get_acct_ctrl(sampass);
+ char *workstation_list;
+ time_t kickoff_time;
+
+ DEBUG(4,("sam_account_ok: Checking SMB password for user %s\n",pdb_get_username(sampass)));
+
+ /* Quit if the account was disabled. */
+ if (acct_ctrl & ACB_DISABLED) {
+ DEBUG(1,("sam_account_ok: Account for user '%s' was disabled.\n", pdb_get_username(sampass)));
+ return NT_STATUS_ACCOUNT_DISABLED;
+ }
+
+ /* Quit if the account was locked out. */
+ if (acct_ctrl & ACB_AUTOLOCK) {
+ DEBUG(1,("sam_account_ok: Account for user %s was locked out.\n", pdb_get_username(sampass)));
+ return NT_STATUS_ACCOUNT_LOCKED_OUT;
+ }
+
+ /* Quit if the account is not allowed to logon at this time. */
+ if (! logon_hours_ok(sampass)) {
+ return NT_STATUS_INVALID_LOGON_HOURS;
+ }
+
+ /* Test account expire time */
+
+ kickoff_time = pdb_get_kickoff_time(sampass);
+ if (kickoff_time != 0 && time(NULL) > kickoff_time) {
+ DEBUG(1,("sam_account_ok: Account for user '%s' has expired.\n", pdb_get_username(sampass)));
+ DEBUG(3,("sam_account_ok: Account expired at '%ld' unix time.\n", (long)kickoff_time));
+ return NT_STATUS_ACCOUNT_EXPIRED;
+ }
+
+ if (!(pdb_get_acct_ctrl(sampass) & ACB_PWNOEXP)) {
+ time_t must_change_time = pdb_get_pass_must_change_time(sampass);
+ time_t last_set_time = pdb_get_pass_last_set_time(sampass);
+
+ /* check for immediate expiry "must change at next logon" */
+ if (must_change_time == 0 && last_set_time != 0) {
+ DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", pdb_get_username(sampass)));
+ return NT_STATUS_PASSWORD_MUST_CHANGE;
+ }
+
+ /* check for expired password */
+ if (must_change_time < time(NULL) && must_change_time != 0) {
+ DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", pdb_get_username(sampass)));
+ DEBUG(1,("sam_account_ok: Password expired at '%s' (%ld) unix time.\n", http_timestring(must_change_time), (long)must_change_time));
+ return NT_STATUS_PASSWORD_EXPIRED;
+ }
+ }
+
+ /* Test workstation. Workstation list is comma separated. */
+
+ workstation_list = talloc_strdup(mem_ctx, pdb_get_workstations(sampass));
+ if (!workstation_list)
+ return NT_STATUS_NO_MEMORY;
+
+ if (*workstation_list) {
+ BOOL invalid_ws = True;
+ fstring tok;
+ const char *s = workstation_list;
+
+ const char *machine_name = talloc_asprintf(mem_ctx, "%s$", user_info->wksta_name.str);
+ if (machine_name == NULL)
+ return NT_STATUS_NO_MEMORY;
+
+
+ while (next_token(&s, tok, ",", sizeof(tok))) {
+ DEBUG(10,("sam_account_ok: checking for workstation match %s and %s (len=%d)\n",
+ tok, user_info->wksta_name.str, user_info->wksta_name.len));
+ if(strequal(tok, user_info->wksta_name.str)) {
+ invalid_ws = False;
+ break;
+ }
+ if (tok[0] == '+') {
+ DEBUG(10,("sam_account_ok: checking for workstation %s in group: %s\n",
+ machine_name, tok + 1));
+ if (user_in_group_list(machine_name, tok + 1, NULL, 0)) {
+ invalid_ws = False;
+ break;
+ }
+ }
+ }
+
+ if (invalid_ws)
+ return NT_STATUS_INVALID_WORKSTATION;
+ }
+
+ if (acct_ctrl & ACB_DOMTRUST) {
+ DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", pdb_get_username(sampass)));
+ return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
+ }
+
+ if (acct_ctrl & ACB_SVRTRUST) {
+ if (!(user_info->logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
+ DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", pdb_get_username(sampass)));
+ return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
+ }
+ }
+
+ if (acct_ctrl & ACB_WSTRUST) {
+ if (!(user_info->logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
+ DEBUG(2,("sam_account_ok: Wksta trust account %s denied by server\n", pdb_get_username(sampass)));
+ return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
+ }
+ }
+ return NT_STATUS_OK;
+}
+
+/****************************************************************************
+check if a username/password is OK assuming the password is a 24 byte
+SMB hash supplied in the user_info structure
+return an NT_STATUS constant.
+****************************************************************************/
+
+static NTSTATUS check_sam_security(const struct auth_context *auth_context,
+ void *my_private_data,
+ TALLOC_CTX *mem_ctx,
+ const auth_usersupplied_info *user_info,
+ auth_serversupplied_info **server_info)
+{
+ SAM_ACCOUNT *sampass=NULL;
+ BOOL ret;
+ NTSTATUS nt_status;
+ NTSTATUS update_login_attempts_status;
+ DATA_BLOB user_sess_key = data_blob(NULL, 0);
+ DATA_BLOB lm_sess_key = data_blob(NULL, 0);
+ BOOL updated_autolock = False, updated_badpw = False;
+
+ if (!user_info || !auth_context) {
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ /* Can't use the talloc version here, because the returned struct gets
+ kept on the server_info */
+ if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
+ return nt_status;
+ }
+
+ /* get the account information */
+
+ become_root();
+ ret = pdb_getsampwnam(sampass, user_info->internal_username.str);
+ unbecome_root();
+
+ if (ret == False) {
+ DEBUG(3,("check_sam_security: Couldn't find user '%s' in passdb.\n", user_info->internal_username.str));
+ pdb_free_sam(&sampass);
+ return NT_STATUS_NO_SUCH_USER;
+ }
+
+ /* see if autolock flag needs to be updated */
+ if (pdb_get_acct_ctrl(sampass) & ACB_NORMAL)
+ pdb_update_autolock_flag(sampass, &updated_autolock);
+ /* Quit if the account was locked out. */
+ if (pdb_get_acct_ctrl(sampass) & ACB_AUTOLOCK) {
+ DEBUG(3,("check_sam_security: Account for user %s was locked out.\n", pdb_get_username(sampass)));
+ return NT_STATUS_ACCOUNT_LOCKED_OUT;
+ }
+
+ nt_status = sam_password_ok(auth_context, mem_ctx, sampass,
+ user_info, &user_sess_key, &lm_sess_key);
+
+ /* Notify passdb backend of login success/failure. If not NT_STATUS_OK the backend doesn't like the login */
+ update_login_attempts_status = pdb_update_login_attempts(sampass, NT_STATUS_IS_OK(nt_status));
+ if (!NT_STATUS_IS_OK(update_login_attempts_status))
+ nt_status = update_login_attempts_status;
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ if (NT_STATUS_EQUAL(nt_status,NT_STATUS_WRONG_PASSWORD) &&
+ pdb_get_acct_ctrl(sampass) &ACB_NORMAL) {
+ pdb_increment_bad_password_count(sampass);
+ updated_badpw = True;
+ } else {
+ pdb_update_bad_password_count(sampass,
+ &updated_badpw);
+ }
+ if (updated_autolock || updated_badpw){
+ become_root();
+ if(!pdb_update_sam_account(sampass))
+ DEBUG(1, ("Failed to modify entry.\n"));
+ unbecome_root();
+ }
+ data_blob_free(&user_sess_key);
+ data_blob_free(&lm_sess_key);
+ pdb_free_sam(&sampass);
+ return nt_status;
+ }
+
+ if ((pdb_get_acct_ctrl(sampass) & ACB_NORMAL) &&
+ (pdb_get_bad_password_count(sampass) > 0)){
+ pdb_set_bad_password_count(sampass, 0, PDB_CHANGED);
+ pdb_set_bad_password_time(sampass, 0, PDB_CHANGED);
+ updated_badpw = True;
+ }
+
+ if (updated_autolock || updated_badpw){
+ become_root();
+ if(!pdb_update_sam_account(sampass))
+ DEBUG(1, ("Failed to modify entry.\n"));
+ unbecome_root();
+ }
+
+ nt_status = sam_account_ok(mem_ctx, sampass, user_info);
+
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ pdb_free_sam(&sampass);
+ data_blob_free(&user_sess_key);
+ data_blob_free(&lm_sess_key);
+ return nt_status;
+ }
+
+ if (!NT_STATUS_IS_OK(nt_status = make_server_info_sam(server_info, sampass))) {
+ DEBUG(0,("check_sam_security: make_server_info_sam() failed with '%s'\n", nt_errstr(nt_status)));
+ data_blob_free(&user_sess_key);
+ data_blob_free(&lm_sess_key);
+ return nt_status;
+ }
+
+ (*server_info)->user_session_key = user_sess_key;
+ (*server_info)->lm_session_key = lm_sess_key;
+
+ return nt_status;
+}
+
+/* module initialisation */
+static NTSTATUS auth_init_sam_ignoredomain(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
+{
+ if (!make_auth_methods(auth_context, auth_method)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ (*auth_method)->auth = check_sam_security;
+ (*auth_method)->name = "sam_ignoredomain";
+ return NT_STATUS_OK;
+}
+
+
+/****************************************************************************
+Check SAM security (above) but with a few extra checks.
+****************************************************************************/
+
+static NTSTATUS check_samstrict_security(const struct auth_context *auth_context,
+ void *my_private_data,
+ TALLOC_CTX *mem_ctx,
+ const auth_usersupplied_info *user_info,
+ auth_serversupplied_info **server_info)
+{
+ BOOL is_local_name, is_my_domain;
+
+ if (!user_info || !auth_context) {
+ return NT_STATUS_LOGON_FAILURE;
+ }
+
+ is_local_name = is_myname(user_info->domain.str);
+ is_my_domain = strequal(user_info->domain.str, lp_workgroup());
+
+ /* check whether or not we service this domain/workgroup name */
+
+ switch ( lp_server_role() ) {
+ case ROLE_STANDALONE:
+ case ROLE_DOMAIN_MEMBER:
+ if ( !is_local_name ) {
+ DEBUG(6,("check_samstrict_security: %s is not one of my local names (%s)\n",
+ user_info->domain.str, (lp_server_role() == ROLE_DOMAIN_MEMBER
+ ? "ROLE_DOMAIN_MEMBER" : "ROLE_STANDALONE") ));
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+ case ROLE_DOMAIN_PDC:
+ case ROLE_DOMAIN_BDC:
+ if ( !is_local_name && !is_my_domain ) {
+ DEBUG(6,("check_samstrict_security: %s is not one of my local names or domain name (DC)\n",
+ user_info->domain.str));
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+ default: /* name is ok */
+ break;
+ }
+
+ return check_sam_security(auth_context, my_private_data, mem_ctx, user_info, server_info);
+}
+
+/* module initialisation */
+static NTSTATUS auth_init_sam(struct auth_context *auth_context, const char *param, auth_methods **auth_method)
+{
+ if (!make_auth_methods(auth_context, auth_method)) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ (*auth_method)->auth = check_samstrict_security;
+ (*auth_method)->name = "sam";
+ return NT_STATUS_OK;
+}
+
+NTSTATUS auth_sam_init(void)
+{
+ smb_register_auth(AUTH_INTERFACE_VERSION, "sam", auth_init_sam);
+ smb_register_auth(AUTH_INTERFACE_VERSION, "sam_ignoredomain", auth_init_sam_ignoredomain);
+ return NT_STATUS_OK;
+}
projects / samba / blobdiff