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                 DEBUG(5,("no domain seperator (%s) in username (%s) - failing fauth\n", lp_winbind_separator(), state->request.data.auth.user));
  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         } else {
  68                 unsigned char local_lm_response[24];
  69                 unsigned char local_nt_response[24];
  70
  71                 generate_random_buffer(chal, 8, False);
  72                 SMBencrypt( (const uchar *)state->request.data.auth.pass, chal, local_lm_response);
  73
  74                 SMBNTencrypt((const uchar *)state->request.data.auth.pass, chal, local_nt_response);
  75
  76                 lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
  77                 nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
  78         }
  79
  80         /*
  81          * Get the machine account password for our primary domain
  82          */
  83
  84         if (!secrets_fetch_trust_account_password(
  85                 lp_workgroup(), trust_passwd, &last_change_time)) {
  86                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
  87                           "password for domain %s\n", lp_workgroup()));
  88                 return WINBINDD_ERROR;
  89         }
  90
  91         /* We really don't care what LUID we give the user. */
  92
  93         generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
  94
  95         ZERO_STRUCT(info3);
  96
  97         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
  98
  99         if (!NT_STATUS_IS_OK(result)) {
 100                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 101                 goto done;
 102         }
 103
 104         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 105                                                 name_user, name_domain,
 106                                                 global_myname, chal,
 107                                                 lm_resp, nt_resp,
 108                                                 &info3);
 109
 110 done:
 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         unsigned char trust_passwd[16];
 125         time_t last_change_time;
 126         NET_USER_INFO_3 info3;
 127         struct cli_state *cli;
 128         TALLOC_CTX *mem_ctx;
 129
 130         DATA_BLOB lm_resp, nt_resp;
 131
 132         extern pstring global_myname;
 133
 134         DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
 135                   state->request.data.auth_crap.user, state->request.data.auth_crap.user));
 136
 137         if (!(mem_ctx = talloc_init_named("winbind pam auth crap for %s", state->request.data.auth.user))) {
 138                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 139                 return WINBINDD_ERROR;
 140         }
 141
 142         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 143         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 144
 145         /*
 146          * Get the machine account password for our primary domain
 147          */
 148
 149         if (!secrets_fetch_trust_account_password(
 150                 lp_workgroup(), trust_passwd, &last_change_time)) {
 151                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
 152                           "password for domain %s\n", lp_workgroup()));
 153                 return WINBINDD_ERROR;
 154         }
 155
 156         ZERO_STRUCT(info3);
 157
 158         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 159
 160         if (!NT_STATUS_IS_OK(result)) {
 161                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 162                 goto done;
 163         }
 164
 165         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 166                                                 state->request.data.auth_crap.user, state->request.data.auth_crap.domain,
 167                                                 global_myname, state->request.data.auth_crap.chal,
 168                                                 lm_resp, nt_resp,
 169                                                 &info3);
 170
 171 done:
 172         talloc_destroy(mem_ctx);
 173
 174         cli_shutdown(cli);
 175
 176         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 177 }
 178
 179 /* Change a user password */
 180
 181 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 182 {
 183         char *oldpass, *newpass;
 184         fstring domain, user;
 185         uchar nt_oldhash[16];
 186         uchar lm_oldhash[16];
 187
 188         DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
 189                 state->request.data.chauthtok.user));
 190
 191         /* Setup crap */
 192
 193         if (state == NULL)
 194                 return WINBINDD_ERROR;
 195
 196         if (!parse_domain_user(state->request.data.chauthtok.user, domain, user))
 197                 return WINBINDD_ERROR;
 198
 199         oldpass = state->request.data.chauthtok.oldpass;
 200         newpass = state->request.data.chauthtok.newpass;
 201
 202         nt_lm_owf_gen(oldpass, nt_oldhash, lm_oldhash);
 203
 204         /* Change password */
 205
 206 #if 0
 207
 208         /* XXX */
 209
 210         if (!msrpc_sam_ntchange_pwd(server_state.controller, domain, user,
 211                 lm_oldhash, nt_oldhash, newpass)) {
 212                 DEBUG(0, ("password change failed for user %s/%s\n", domain, user));
 213                 return WINBINDD_ERROR;
 214         }
 215 #endif
 216
 217         return WINBINDD_OK;
 218 }