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;
  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                 return WINBINDD_ERROR;
  60
  61         passlen = strlen(state->request.data.auth.pass);
  62
  63         if (!*state->request.data.auth.pass) {
  64                 return WINBINDD_ERROR;
  65         } else {
  66                 unsigned char local_lm_response[24];
  67                 unsigned char local_nt_response[24];
  68
  69                 generate_random_buffer(chal, 8, False);
  70                 SMBencrypt( (const uchar *)state->request.data.auth.pass, chal, local_lm_response);
  71
  72                 SMBNTencrypt((const uchar *)state->request.data.auth.pass, chal, local_nt_response);
  73
  74                 lm_resp = data_blob(local_lm_response, sizeof(local_lm_response));
  75                 nt_resp = data_blob(local_nt_response, sizeof(local_nt_response));
  76         }
  77
  78         /*
  79          * Get the machine account password for our primary domain
  80          */
  81
  82         if (!secrets_fetch_trust_account_password(
  83                 lp_workgroup(), trust_passwd, &last_change_time)) {
  84                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
  85                           "password for domain %s\n", lp_workgroup()));
  86                 return WINBINDD_ERROR;
  87         }
  88
  89         /* We really don't care what LUID we give the user. */
  90
  91         generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
  92
  93         ZERO_STRUCT(info3);
  94
  95         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
  96
  97         if (!NT_STATUS_IS_OK(result)) {
  98                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
  99                 goto done;
 100         }
 101
 102         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 103                                                 name_user, name_domain,
 104                                                 global_myname, chal,
 105                                                 lm_resp, nt_resp,
 106                                                 &info3);
 107
 108 done:
 109         data_blob_free(&lm_resp);
 110         data_blob_free(&nt_resp);
 111
 112         cli_shutdown(cli);
 113
 114         talloc_destroy(mem_ctx);
 115
 116         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 117 }
 118
 119 /* Challenge Response Authentication Protocol */
 120
 121 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 122 {
 123         NTSTATUS result;
 124         fstring name_domain, name_user;
 125         unsigned char trust_passwd[16];
 126         time_t last_change_time;
 127         NET_USER_INFO_3 info3;
 128         struct cli_state *cli;
 129         TALLOC_CTX *mem_ctx;
 130
 131         DATA_BLOB lm_resp, nt_resp;
 132
 133         extern pstring global_myname;
 134
 135         DEBUG(3, ("[%5d]: pam auth crap %s\n", state->pid,
 136                   state->request.data.auth_crap.user));
 137
 138         if (!(mem_ctx = talloc_init_named("winbind pam auth for %s", state->request.data.auth.user))) {
 139                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 140                 return WINBINDD_ERROR;
 141         }
 142
 143         /* Parse domain and username */
 144         if (!parse_domain_user(state->request.data.auth_crap.user, name_domain,
 145                                name_user))
 146                 return WINBINDD_ERROR;
 147
 148
 149
 150         lm_resp = data_blob(state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 151         nt_resp = data_blob(state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 152
 153         /*
 154          * Get the machine account password for our primary domain
 155          */
 156
 157         if (!secrets_fetch_trust_account_password(
 158                 lp_workgroup(), trust_passwd, &last_change_time)) {
 159                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
 160                           "password for domain %s\n", lp_workgroup()));
 161                 return WINBINDD_ERROR;
 162         }
 163
 164         ZERO_STRUCT(info3);
 165
 166         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 167
 168         if (!NT_STATUS_IS_OK(result)) {
 169                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 170                 goto done;
 171         }
 172
 173         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 174                                                 name_user, name_domain,
 175                                                 global_myname, state->request.data.auth_crap.chal,
 176                                                 lm_resp, nt_resp,
 177                                                 &info3);
 178
 179 done:
 180         talloc_destroy(mem_ctx);
 181
 182         cli_shutdown(cli);
 183
 184         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 185 }
 186
 187 /* Change a user password */
 188
 189 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 190 {
 191         char *oldpass, *newpass;
 192         fstring domain, user;
 193         uchar nt_oldhash[16];
 194         uchar lm_oldhash[16];
 195
 196         DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
 197                 state->request.data.chauthtok.user));
 198
 199         /* Setup crap */
 200
 201         if (state == NULL)
 202                 return WINBINDD_ERROR;
 203
 204         if (!parse_domain_user(state->request.data.chauthtok.user, domain, user))
 205                 return WINBINDD_ERROR;
 206
 207         oldpass = state->request.data.chauthtok.oldpass;
 208         newpass = state->request.data.chauthtok.newpass;
 209
 210         nt_lm_owf_gen(oldpass, nt_oldhash, lm_oldhash);
 211
 212         /* Change password */
 213
 214 #if 0
 215
 216         /* XXX */
 217
 218         if (!msrpc_sam_ntchange_pwd(server_state.controller, domain, user,
 219                 lm_oldhash, nt_oldhash, newpass)) {
 220                 DEBUG(0, ("password change failed for user %s/%s\n", domain, user));
 221                 return WINBINDD_ERROR;
 222         }
 223 #endif
 224
 225         return WINBINDD_OK;
 226 }