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 2001-2002
   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 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_WINBIND
  29
  30 /* Return a password structure from a username.  */
  31
  32 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
  33 {
  34         NTSTATUS result;
  35         fstring name_domain, name_user;
  36         int passlen;
  37         unsigned char trust_passwd[16];
  38         time_t last_change_time;
  39         uint32 smb_uid_low;
  40         NET_USER_INFO_3 info3;
  41         struct cli_state *cli = NULL;
  42         uchar chal[8];
  43         TALLOC_CTX *mem_ctx = NULL;
  44         DATA_BLOB lm_resp;
  45         DATA_BLOB nt_resp;
  46
  47         extern pstring global_myname;
  48
  49         DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
  50                   state->request.data.auth.user));
  51
  52         if (!(mem_ctx = talloc_init_named("winbind pam auth for %s", state->request.data.auth.user))) {
  53                 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
  54                 result = NT_STATUS_NO_MEMORY;
  55                 goto done;
  56         }
  57
  58         /* Parse domain and username */
  59
  60         if (!parse_domain_user(state->request.data.auth.user, name_domain,
  61                                name_user)) {
  62                 DEBUG(5,("no domain separator (%s) in username (%s) - failing auth\n", lp_winbind_separator(), state->request.data.auth.user));
  63                 result = NT_STATUS_INVALID_PARAMETER;
  64                 goto done;
  65         }
  66
  67         passlen = strlen(state->request.data.auth.pass);
  68
  69         {
  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                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
  91                 goto done;
  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         /* Don't shut this down - it belongs to the connection cache code */
 101         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 102
 103         if (!NT_STATUS_IS_OK(result)) {
 104                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 105                 goto done;
 106         }
 107
 108         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 109                                                 name_user, name_domain,
 110                                                 global_myname, chal,
 111                                                 lm_resp, nt_resp,
 112                                                 &info3);
 113
 114         uni_group_cache_store_netlogon(mem_ctx, &info3);
 115 done:
 116
 117         state->response.data.auth.nt_status = NT_STATUS_V(result);
 118         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 119         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 120         state->response.data.auth.pam_error = nt_status_to_pam(result);
 121
 122         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 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         /* Don't shut this down - it belongs to the connection cache code */
 192         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 193
 194         if (!NT_STATUS_IS_OK(result)) {
 195                 DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n", nt_errstr(result)));
 196                 goto done;
 197         }
 198
 199         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 200                                                 state->request.data.auth_crap.user, domain,
 201                                                 global_myname, state->request.data.auth_crap.chal,
 202                                                 lm_resp, nt_resp,
 203                                                 &info3);
 204
 205         if (NT_STATUS_IS_OK(result)) {
 206                 uni_group_cache_store_netlogon(mem_ctx, &info3);
 207         }
 208
 209 done:
 210
 211         state->response.data.auth.nt_status = NT_STATUS_V(result);
 212         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 213         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 214         state->response.data.auth.pam_error = nt_status_to_pam(result);
 215
 216         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("NTLM CRAP authenticaion for user [%s]\\[%s] returned %s (PAM: %d)\n",
 217               state->request.data.auth_crap.domain,
 218               state->request.data.auth_crap.user,
 219               state->response.data.auth.nt_status_string,
 220               state->response.data.auth.pam_error));
 221
 222         if (mem_ctx)
 223                 talloc_destroy(mem_ctx);
 224
 225         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 226 }
 227
 228 /* Change a user password */
 229
 230 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 231 {
 232         NTSTATUS result;
 233         char *oldpass, *newpass;
 234         fstring domain, user;
 235         CLI_POLICY_HND *hnd;
 236
 237         DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
 238                 state->request.data.chauthtok.user));
 239
 240         /* Setup crap */
 241
 242         if (state == NULL)
 243                 return WINBINDD_ERROR;
 244
 245         if (!parse_domain_user(state->request.data.chauthtok.user, domain,
 246                                user)) {
 247                 result = NT_STATUS_INVALID_PARAMETER;
 248                 goto done;
 249         }
 250
 251         /* Change password */
 252
 253         oldpass = state->request.data.chauthtok.oldpass;
 254         newpass = state->request.data.chauthtok.newpass;
 255
 256         /* Get sam handle */
 257
 258         if (!(hnd = cm_get_sam_handle(domain))) {
 259                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
 260                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 261                 goto done;
 262         }
 263
 264         if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
 265                 DEBUG(1, ("password change failed for user %s/%s\n", domain,
 266                           user));
 267                 result = NT_STATUS_WRONG_PASSWORD;
 268         } else {
 269                 result = NT_STATUS_OK;
 270         }
 271
 272 done:
 273         state->response.data.auth.nt_status = NT_STATUS_V(result);
 274         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 275         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 276         state->response.data.auth.pam_error = nt_status_to_pam(result);
 277
 278         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 279 }