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subystem. The particular aim is to modularized the interface - so that we can have arbitrary password back-ends. This code adds one such back-end, a 'winbind' module to authenticate against the winbind_auth_crap functionality. While fully-functional this code is mainly useful as a demonstration, because we don't get back the info3 as we would for direct ntdomain authentication. This commit introduced the new 'auth methods' parameter, in the spirit of the 'auth order' discussed on the lists. It is renamed because not all the methods may be consulted, even if previous methods fail - they may not have a suitable challenge for example. Also, we have a 'local' authentication method, for old-style 'unix if plaintext, sam if encrypted' authentication and a 'guest' module to handle guest logins in a single place. While this current design is not ideal, I feel that it does provide a better infrastructure than the current design, and can be built upon. The following parameters have changed: - use rhosts = This has been replaced by the 'rhosts' authentication method, and can be specified like 'auth methods = guest rhosts' - hosts equiv = This needs both this parameter and an 'auth methods' entry to be effective. (auth methods = guest hostsequiv ....) - plaintext to smbpasswd = This is replaced by specifying 'sam' rather than 'local' in the auth methods. The security = parameter is unchanged, and now provides defaults for the 'auth methods' parameter. The available auth methods are: guest rhosts hostsequiv sam (passdb direct hash access) unix (PAM, crypt() etc) local (the combination of the above, based on encryption) smbserver (old security=server) ntdomain (old security=domain) winbind (use winbind to cache DC connections) Assistance in testing, or the production of new and interesting authentication modules is always appreciated. Andrew Bartlett
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207 lines
5.8 KiB
C
207 lines
5.8 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 3.0
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Winbind daemon - pam auth funcions
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Copyright (C) Andrew Tridgell 2000
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Copyright (C) Tim Potter 2001
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Copyright (C) Andrew Bartlett 2001
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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "winbindd.h"
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/* Return a password structure from a username. Specify whether cached data
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can be returned. */
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enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
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{
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NTSTATUS result;
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fstring name_domain, name_user;
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int passlen;
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unsigned char trust_passwd[16];
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time_t last_change_time;
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auth_usersupplied_info *user_info;
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uint32 smb_uid_low;
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NET_USER_INFO_3 info3;
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NET_ID_INFO_CTR ctr;
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struct cli_state *cli;
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uchar chal[8];
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DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
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state->request.data.auth.user));
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/* Parse domain and username */
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parse_domain_user(state->request.data.auth.user, name_domain,
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name_user);
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/* don't allow the null domain */
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if (strcmp(name_domain,"") == 0)
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return WINBINDD_ERROR;
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passlen = strlen(state->request.data.auth.pass);
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if (state->request.data.auth.pass[0])
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make_user_info_winbind(&user_info,
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name_user, name_domain,
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state->request.data.auth.pass,
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chal);
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else
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return WINBINDD_ERROR;
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/*
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* Get the machine account password for our primary domain
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*/
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if (!secrets_fetch_trust_account_password(
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lp_workgroup(), trust_passwd, &last_change_time)) {
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DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
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"password for domain %s\n", lp_workgroup()));
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return WINBINDD_ERROR;
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}
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/* We really don't care what LUID we give the user. */
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generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
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ZERO_STRUCT(info3);
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result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
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if (!NT_STATUS_IS_OK(result)) {
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DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
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goto done;
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}
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result = cli_nt_login_network(cli, user_info, chal, smb_uid_low,
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&ctr, &info3);
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free_user_info(&user_info);
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cli_shutdown(cli);
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done:
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return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
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}
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/* Challenge Response Authentication Protocol */
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enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
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{
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NTSTATUS result;
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fstring name_domain, name_user;
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unsigned char trust_passwd[16];
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time_t last_change_time;
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auth_usersupplied_info *user_info;
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uint32 smb_uid_low;
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NET_USER_INFO_3 info3;
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NET_ID_INFO_CTR ctr;
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struct cli_state *cli;
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DEBUG(3, ("[%5d]: pam auth crap %s\n", state->pid,
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state->request.data.auth_crap.user));
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/* Parse domain and username */
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parse_domain_user(state->request.data.auth_crap.user, name_domain,
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name_user);
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make_user_info_winbind_crap(
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&user_info, name_user,
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name_domain,
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(uchar *)state->request.data.auth_crap.lm_resp,
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state->request.data.auth_crap.lm_resp_len,
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(uchar *)state->request.data.auth_crap.nt_resp,
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state->request.data.auth_crap.nt_resp_len);
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/*
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* Get the machine account password for our primary domain
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*/
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if (!secrets_fetch_trust_account_password(
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lp_workgroup(), trust_passwd, &last_change_time)) {
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DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
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"password for domain %s\n", lp_workgroup()));
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return WINBINDD_ERROR;
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}
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/* We really don't care what LUID we give the user. */
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generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
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ZERO_STRUCT(info3);
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result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
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if (!NT_STATUS_IS_OK(result)) {
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DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
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goto done;
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}
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result = cli_nt_login_network(cli, user_info, state->request.data.auth_crap.chal,
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smb_uid_low, &ctr, &info3);
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free_user_info(&user_info);
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cli_shutdown(cli);
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done:
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return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
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}
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/* Change a user password */
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enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
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{
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char *oldpass, *newpass;
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fstring domain, user;
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uchar nt_oldhash[16];
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uchar lm_oldhash[16];
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DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
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state->request.data.chauthtok.user));
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/* Setup crap */
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if (state == NULL) return WINBINDD_ERROR;
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parse_domain_user(state->request.data.chauthtok.user, domain, user);
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oldpass = state->request.data.chauthtok.oldpass;
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newpass = state->request.data.chauthtok.newpass;
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nt_lm_owf_gen(oldpass, nt_oldhash, lm_oldhash);
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/* Change password */
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#if 0
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/* XXX */
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if (!msrpc_sam_ntchange_pwd(server_state.controller, domain, user,
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lm_oldhash, nt_oldhash, newpass)) {
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DEBUG(0, ("password change failed for user %s/%s\n", domain, user));
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return WINBINDD_ERROR;
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}
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#endif
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return WINBINDD_OK;
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}
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