source/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 2001-2002
   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 = NULL;
  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                 result = NT_STATUS_NO_MEMORY;
  52                 goto done;
  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                 result = NT_STATUS_INVALID_PARAMETER;
  61                 goto done;
  62         }
  63
  64         passlen = strlen(state->request.data.auth.pass);
  65
  66         {
  67                 unsigned char local_lm_response[24];
  68                 unsigned char local_nt_response[24];
  69
  70                 generate_random_buffer(chal, 8, False);
  71                 SMBencrypt( (const uchar *)state->request.data.auth.pass, chal, local_lm_response);
  72
  73                 SMBNTencrypt((const uchar *)state->request.data.auth.pass, chal, local_nt_response);
  74
  75                 lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
  76                 nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
  77         }
  78
  79         /*
  80          * Get the machine account password for our primary domain
  81          */
  82
  83         if (!secrets_fetch_trust_account_password(
  84                 lp_workgroup(), trust_passwd, &last_change_time)) {
  85                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
  86                           "password for domain %s\n", lp_workgroup()));
  87                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
  88                 goto done;
  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                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 102                 goto done;
 103         }
 104
 105         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 106                                                 name_user, name_domain,
 107                                                 global_myname, chal,
 108                                                 lm_resp, nt_resp,
 109                                                 &info3);
 110
 111         uni_group_cache_store_netlogon(mem_ctx, &info3);
 112 done:
 113
 114         if (cli)
 115                 cli_shutdown(cli);
 116
 117         state->response.data.auth.nt_status = NT_STATUS_V(result);
 118         fstrcpy(state->response.data.auth.nt_status_string, get_nt_error_msg(result));
 119         fstrcpy(state->response.data.auth.error_string, get_nt_error_msg(result));
 120         state->response.data.auth.pam_error = nt_status_to_pam(result);
 121
 122         DEBUG(2, ("Plain-text authenticaion for user %s returned %s (PAM: %d)\n",
 123               state->request.data.auth.user,
 124               state->response.data.auth.nt_status_string,
 125               state->response.data.auth.pam_error));
 126
 127         if (mem_ctx)
 128                 talloc_destroy(mem_ctx);
 129
 130         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 131 }
 132
 133 /* Challenge Response Authentication Protocol */
 134
 135 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 136 {
 137         NTSTATUS result;
 138         unsigned char trust_passwd[16];
 139         time_t last_change_time;
 140         NET_USER_INFO_3 info3;
 141         struct cli_state *cli = NULL;
 142         TALLOC_CTX *mem_ctx = NULL;
 143         const char *domain = NULL;
 144
 145         DATA_BLOB lm_resp, nt_resp;
 146
 147         extern pstring global_myname;
 148
 149         DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
 150                   state->request.data.auth_crap.domain, state->request.data.auth_crap.user));
 151
 152         if (!(mem_ctx = talloc_init_named("winbind pam auth crap for %s", state->request.data.auth.user))) {
 153                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 154                 result = NT_STATUS_NO_MEMORY;
 155                 goto done;
 156         }
 157
 158         if (*state->request.data.auth_crap.domain) {
 159                 domain = talloc_strdup(mem_ctx, state->request.data.auth_crap.domain);
 160         } else if (lp_winbind_use_default_domain()) {
 161                 domain = talloc_strdup(mem_ctx, lp_workgroup());
 162         } else {
 163                 DEBUG(5,("no domain specified with username (%s) - failing auth\n", state->request.data.auth.user));
 164                 result = NT_STATUS_INVALID_PARAMETER;
 165                 goto done;
 166         }
 167
 168         if (!domain) {
 169                 DEBUG(0,("winbindd_pam_auth_crap: talloc_strdup failed!\n"));
 170                 result = NT_STATUS_NO_MEMORY;
 171                 goto done;
 172         }
 173
 174         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 175         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 176
 177         /*
 178          * Get the machine account password for our primary domain
 179          */
 180
 181         if (!secrets_fetch_trust_account_password(
 182                 lp_workgroup(), trust_passwd, &last_change_time)) {
 183                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
 184                           "password for domain %s\n", lp_workgroup()));
 185                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 186                 goto done;
 187         }
 188
 189         ZERO_STRUCT(info3);
 190
 191         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 192
 193         if (!NT_STATUS_IS_OK(result)) {
 194                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 195                 goto done;
 196         }
 197
 198         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 199                                                 state->request.data.auth_crap.user, domain,
 200                                                 global_myname, state->request.data.auth_crap.chal,
 201                                                 lm_resp, nt_resp,
 202                                                 &info3);
 203
 204         if (NT_STATUS_IS_OK(result)) {
 205                 uni_group_cache_store_netlogon(mem_ctx, &info3);
 206         }
 207
 208 done:
 209
 210         if (cli)
 211                 cli_shutdown(cli);
 212
 213         state->response.data.auth.nt_status = NT_STATUS_V(result);
 214         fstrcpy(state->response.data.auth.nt_status_string, get_nt_error_msg(result));
 215         fstrcpy(state->response.data.auth.error_string, get_nt_error_msg(result));
 216         state->response.data.auth.pam_error = nt_status_to_pam(result);
 217
 218         DEBUG(2, ("NTLM CRAP authenticaion for user [%s]\\[%s] returned %s (PAM: %d)\n",
 219               state->request.data.auth_crap.domain,
 220               state->request.data.auth_crap.user,
 221               state->response.data.auth.nt_status_string,
 222               state->response.data.auth.pam_error));
 223
 224         if (mem_ctx)
 225                 talloc_destroy(mem_ctx);
 226
 227         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 228 }
 229
 230 /* Change a user password */
 231
 232 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 233 {
 234         NTSTATUS result;
 235         char *oldpass, *newpass;
 236         fstring domain, user;
 237         CLI_POLICY_HND *hnd;
 238
 239         DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
 240                 state->request.data.chauthtok.user));
 241
 242         /* Setup crap */
 243
 244         if (state == NULL)
 245                 return WINBINDD_ERROR;
 246
 247         if (!parse_domain_user(state->request.data.chauthtok.user, domain,
 248                                user)) {
 249                 result = NT_STATUS_INVALID_PARAMETER;
 250                 goto done;
 251         }
 252
 253         /* Change password */
 254
 255         oldpass = state->request.data.chauthtok.oldpass;
 256         newpass = state->request.data.chauthtok.newpass;
 257
 258         /* Get sam handle */
 259
 260         if (!(hnd = cm_get_sam_handle(domain))) {
 261                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
 262                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 263                 goto done;
 264         }
 265
 266         if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
 267                 DEBUG(1, ("password change failed for user %s/%s\n", domain,
 268                           user));
 269                 result = NT_STATUS_WRONG_PASSWORD;
 270         } else {
 271                 result = NT_STATUS_OK;
 272         }
 273
 274 done:
 275         state->response.data.auth.nt_status = NT_STATUS_V(result);
 276         fstrcpy(state->response.data.auth.nt_status_string, get_nt_error_msg(result));
 277         fstrcpy(state->response.data.auth.error_string, get_nt_error_msg(result));
 278         state->response.data.auth.pam_error = nt_status_to_pam(result);
 279
 280         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 281 }