source3/nsswitch/winbindd_pam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon - pam auth funcions
   5
   6    Copyright (C) Andrew Tridgell 2000
   7    Copyright (C) Tim Potter 2001
   8    Copyright (C) Andrew Bartlett 2001
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "winbindd.h"
  26
  27 /* Return a password structure from a username.  */
  28
  29 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
  30 {
  31         NTSTATUS result;
  32         fstring name_domain, name_user;
  33         int passlen;
  34         unsigned char trust_passwd[16];
  35         time_t last_change_time;
  36         uint32 smb_uid_low;
  37         NET_USER_INFO_3 info3;
  38         struct cli_state *cli = NULL;
  39         uchar chal[8];
  40         TALLOC_CTX *mem_ctx;
  41         DATA_BLOB lm_resp;
  42         DATA_BLOB nt_resp;
  43
  44         extern pstring global_myname;
  45
  46         DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
  47                   state->request.data.auth.user));
  48
  49         if (!(mem_ctx = talloc_init_named("winbind pam auth for %s", state->request.data.auth.user))) {
  50                 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
  51                 return WINBINDD_ERROR;
  52         }
  53
  54         /* Parse domain and username */
  55
  56         if (!parse_domain_user(state->request.data.auth.user, name_domain,
  57                                name_user)) {
  58                 DEBUG(5,("no domain seperator (%s) in username (%s) - failing auth\n", lp_winbind_separator(), state->request.data.auth.user));
  59                 talloc_destroy(mem_ctx);
  60                 return WINBINDD_ERROR;
  61         }
  62
  63         passlen = strlen(state->request.data.auth.pass);
  64
  65         if (!*state->request.data.auth.pass) {
  66                 return WINBINDD_ERROR;
  67                 talloc_destroy(mem_ctx);
  68         } else {
  69                 unsigned char local_lm_response[24];
  70                 unsigned char local_nt_response[24];
  71
  72                 generate_random_buffer(chal, 8, False);
  73                 SMBencrypt( (const uchar *)state->request.data.auth.pass, chal, local_lm_response);
  74
  75                 SMBNTencrypt((const uchar *)state->request.data.auth.pass, chal, local_nt_response);
  76
  77                 lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
  78                 nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
  79         }
  80
  81         /*
  82          * Get the machine account password for our primary domain
  83          */
  84
  85         if (!secrets_fetch_trust_account_password(
  86                 lp_workgroup(), trust_passwd, &last_change_time)) {
  87                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
  88                           "password for domain %s\n", lp_workgroup()));
  89                 talloc_destroy(mem_ctx);
  90                 return WINBINDD_ERROR;
  91         }
  92
  93         /* We really don't care what LUID we give the user. */
  94
  95         generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
  96
  97         ZERO_STRUCT(info3);
  98
  99         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 100
 101         if (!NT_STATUS_IS_OK(result)) {
 102                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 103                 goto done;
 104         }
 105
 106         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 107                                                 name_user, name_domain,
 108                                                 global_myname, chal,
 109                                                 lm_resp, nt_resp,
 110                                                 &info3);
 111
 112         uni_group_cache_store_netlogon(mem_ctx, &info3);
 113 done:
 114
 115         if (cli)
 116                 cli_shutdown(cli);
 117
 118         talloc_destroy(mem_ctx);
 119
 120         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 121 }
 122
 123 /* Challenge Response Authentication Protocol */
 124
 125 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 126 {
 127         NTSTATUS result;
 128         unsigned char trust_passwd[16];
 129         time_t last_change_time;
 130         NET_USER_INFO_3 info3;
 131         struct cli_state *cli = NULL;
 132         TALLOC_CTX *mem_ctx;
 133         const char *domain = NULL;
 134
 135         DATA_BLOB lm_resp, nt_resp;
 136
 137         extern pstring global_myname;
 138
 139         DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
 140                   state->request.data.auth_crap.user, state->request.data.auth_crap.user));
 141
 142         if (!(mem_ctx = talloc_init_named("winbind pam auth crap for %s", state->request.data.auth.user))) {
 143                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 144                 return WINBINDD_ERROR;
 145         }
 146
 147         if (*state->request.data.auth_crap.domain) {
 148                 domain = talloc_strdup(mem_ctx, state->request.data.auth_crap.domain);
 149         } else if (lp_winbind_use_default_domain()) {
 150                 domain = talloc_strdup(mem_ctx, lp_workgroup());
 151         } else {
 152                 DEBUG(5,("no domain specified with username (%s) - failing auth\n", state->request.data.auth.user));
 153                 talloc_destroy(mem_ctx);
 154                 return WINBINDD_ERROR;
 155         }
 156
 157         if (!domain) {
 158                 DEBUG(0,("winbindd_pam_auth_crap: talloc_strdup failed!\n"));
 159                 talloc_destroy(mem_ctx);
 160                 return WINBINDD_ERROR;
 161         }
 162
 163         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 164         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 165
 166         /*
 167          * Get the machine account password for our primary domain
 168          */
 169
 170         if (!secrets_fetch_trust_account_password(
 171                 lp_workgroup(), trust_passwd, &last_change_time)) {
 172                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
 173                           "password for domain %s\n", lp_workgroup()));
 174                 talloc_destroy(mem_ctx);
 175                 return WINBINDD_ERROR;
 176         }
 177
 178         ZERO_STRUCT(info3);
 179
 180         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 181
 182         if (!NT_STATUS_IS_OK(result)) {
 183                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 184                 goto done;
 185         }
 186
 187         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 188                                                 state->request.data.auth_crap.user, domain,
 189                                                 global_myname, state->request.data.auth_crap.chal,
 190                                                 lm_resp, nt_resp,
 191                                                 &info3);
 192
 193         uni_group_cache_store_netlogon(mem_ctx, &info3);
 194 done:
 195         talloc_destroy(mem_ctx);
 196
 197         if (cli)
 198                 cli_shutdown(cli);
 199
 200         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 201 }
 202
 203 /* Change a user password */
 204
 205 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 206 {
 207         char *oldpass, *newpass;
 208         fstring domain, user;
 209         uchar nt_oldhash[16];
 210         uchar lm_oldhash[16];
 211         CLI_POLICY_HND *hnd;
 212
 213         DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
 214                 state->request.data.chauthtok.user));
 215
 216         /* Setup crap */
 217
 218         if (state == NULL)
 219                 return WINBINDD_ERROR;
 220
 221         if (!parse_domain_user(state->request.data.chauthtok.user, domain,
 222                                user))
 223                 return WINBINDD_ERROR;
 224
 225         /* Change password */
 226
 227         oldpass = state->request.data.chauthtok.oldpass;
 228         newpass = state->request.data.chauthtok.newpass;
 229
 230         /* Get sam handle */
 231
 232         if (!(hnd = cm_get_sam_handle(domain)))
 233                 return WINBINDD_ERROR;
 234
 235         if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
 236                 DEBUG(0, ("password change failed for user %s/%s\n", domain,
 237                           user));
 238                 return WINBINDD_ERROR;
 239         }
 240
 241         return WINBINDD_OK;
 242 }