source3/nsswitch/winbindd_pam.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4
   5    Winbind daemon - pam auth funcions
   6
   7    Copyright (C) Andrew Tridgell 2000
   8    Copyright (C) Tim Potter 2001
   9    Copyright (C) Andrew Bartlett 2001
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 */
  25
  26 #include "winbindd.h"
  27
  28 /* Return a password structure from a username.  */
  29
  30 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
  31 {
  32         NTSTATUS result;
  33         fstring name_domain, name_user;
  34         int passlen;
  35         unsigned char trust_passwd[16];
  36         time_t last_change_time;
  37         uint32 smb_uid_low;
  38         NET_USER_INFO_3 info3;
  39         struct cli_state *cli = NULL;
  40         uchar chal[8];
  41         TALLOC_CTX *mem_ctx;
  42         DATA_BLOB lm_resp;
  43         DATA_BLOB nt_resp;
  44
  45         extern pstring global_myname;
  46
  47         DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
  48                   state->request.data.auth.user));
  49
  50         if (!(mem_ctx = talloc_init_named("winbind pam auth for %s", state->request.data.auth.user))) {
  51                 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
  52                 return WINBINDD_ERROR;
  53         }
  54
  55         /* Parse domain and username */
  56
  57         if (!parse_domain_user(state->request.data.auth.user, name_domain,
  58                                name_user)) {
  59                 DEBUG(5,("no domain seperator (%s) in username (%s) - failing auth\n", lp_winbind_separator(), state->request.data.auth.user));
  60                 talloc_destroy(mem_ctx);
  61                 return WINBINDD_ERROR;
  62         }
  63
  64         passlen = strlen(state->request.data.auth.pass);
  65
  66         if (!*state->request.data.auth.pass) {
  67                 return WINBINDD_ERROR;
  68                 talloc_destroy(mem_ctx);
  69         } else {
  70                 unsigned char local_lm_response[24];
  71                 unsigned char local_nt_response[24];
  72
  73                 generate_random_buffer(chal, 8, False);
  74                 SMBencrypt( (const uchar *)state->request.data.auth.pass, chal, local_lm_response);
  75
  76                 SMBNTencrypt((const uchar *)state->request.data.auth.pass, chal, local_nt_response);
  77
  78                 lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
  79                 nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
  80         }
  81
  82         /*
  83          * Get the machine account password for our primary domain
  84          */
  85
  86         if (!secrets_fetch_trust_account_password(
  87                 lp_workgroup(), trust_passwd, &last_change_time)) {
  88                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
  89                           "password for domain %s\n", lp_workgroup()));
  90                 talloc_destroy(mem_ctx);
  91                 return WINBINDD_ERROR;
  92         }
  93
  94         /* We really don't care what LUID we give the user. */
  95
  96         generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
  97
  98         ZERO_STRUCT(info3);
  99
 100         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 101
 102         if (!NT_STATUS_IS_OK(result)) {
 103                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 104                 goto done;
 105         }
 106
 107         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 108                                                 name_user, name_domain,
 109                                                 global_myname, chal,
 110                                                 lm_resp, nt_resp,
 111                                                 &info3);
 112
 113         uni_group_cache_store_netlogon(mem_ctx, &info3);
 114 done:
 115
 116         if (cli)
 117                 cli_shutdown(cli);
 118
 119         talloc_destroy(mem_ctx);
 120
 121         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 122 }
 123
 124 /* Challenge Response Authentication Protocol */
 125
 126 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 127 {
 128         NTSTATUS result;
 129         unsigned char trust_passwd[16];
 130         time_t last_change_time;
 131         NET_USER_INFO_3 info3;
 132         struct cli_state *cli = NULL;
 133         TALLOC_CTX *mem_ctx;
 134         const char *domain = NULL;
 135
 136         DATA_BLOB lm_resp, nt_resp;
 137
 138         extern pstring global_myname;
 139
 140         DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
 141                   state->request.data.auth_crap.user, state->request.data.auth_crap.user));
 142
 143         if (!(mem_ctx = talloc_init_named("winbind pam auth crap for %s", state->request.data.auth.user))) {
 144                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 145                 return WINBINDD_ERROR;
 146         }
 147
 148         if (*state->request.data.auth_crap.domain) {
 149                 domain = talloc_strdup(mem_ctx, state->request.data.auth_crap.domain);
 150         } else if (lp_winbind_use_default_domain()) {
 151                 domain = talloc_strdup(mem_ctx, lp_workgroup());
 152         } else {
 153                 DEBUG(5,("no domain specified with username (%s) - failing auth\n", state->request.data.auth.user));
 154                 talloc_destroy(mem_ctx);
 155                 return WINBINDD_ERROR;
 156         }
 157
 158         if (!domain) {
 159                 DEBUG(0,("winbindd_pam_auth_crap: talloc_strdup failed!\n"));
 160                 talloc_destroy(mem_ctx);
 161                 return WINBINDD_ERROR;
 162         }
 163
 164         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 165         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 166
 167         /*
 168          * Get the machine account password for our primary domain
 169          */
 170
 171         if (!secrets_fetch_trust_account_password(
 172                 lp_workgroup(), trust_passwd, &last_change_time)) {
 173                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
 174                           "password for domain %s\n", lp_workgroup()));
 175                 talloc_destroy(mem_ctx);
 176                 return WINBINDD_ERROR;
 177         }
 178
 179         ZERO_STRUCT(info3);
 180
 181         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 182
 183         if (!NT_STATUS_IS_OK(result)) {
 184                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 185                 goto done;
 186         }
 187
 188         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 189                                                 state->request.data.auth_crap.user, domain,
 190                                                 global_myname, state->request.data.auth_crap.chal,
 191                                                 lm_resp, nt_resp,
 192                                                 &info3);
 193
 194         uni_group_cache_store_netlogon(mem_ctx, &info3);
 195 done:
 196         talloc_destroy(mem_ctx);
 197
 198         if (cli)
 199                 cli_shutdown(cli);
 200
 201         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 202 }
 203
 204 /* Change a user password */
 205
 206 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 207 {
 208         char *oldpass, *newpass;
 209         fstring domain, user;
 210         uchar nt_oldhash[16];
 211         uchar lm_oldhash[16];
 212         CLI_POLICY_HND *hnd;
 213
 214         DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
 215                 state->request.data.chauthtok.user));
 216
 217         /* Setup crap */
 218
 219         if (state == NULL)
 220                 return WINBINDD_ERROR;
 221
 222         if (!parse_domain_user(state->request.data.chauthtok.user, domain,
 223                                user))
 224                 return WINBINDD_ERROR;
 225
 226         /* Change password */
 227
 228         oldpass = state->request.data.chauthtok.oldpass;
 229         newpass = state->request.data.chauthtok.newpass;
 230
 231         /* Get sam handle */
 232
 233         if (!(hnd = cm_get_sam_handle(domain)))
 234                 return WINBINDD_ERROR;
 235
 236         if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
 237                 DEBUG(0, ("password change failed for user %s/%s\n", domain,
 238                           user));
 239                 return WINBINDD_ERROR;
 240         }
 241
 242         return WINBINDD_OK;
 243 }