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 separator (%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         /* Don't shut this down - it belongs to the connection cache code */
  98         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
  99
 100         if (!NT_STATUS_IS_OK(result)) {
 101                 DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 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 done:
 112
 113         state->response.data.auth.nt_status = NT_STATUS_V(result);
 114         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 115         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 116         state->response.data.auth.pam_error = nt_status_to_pam(result);
 117
 118         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authenticaion for user %s returned %s (PAM: %d)\n",
 119               state->request.data.auth.user,
 120               state->response.data.auth.nt_status_string,
 121               state->response.data.auth.pam_error));
 122
 123         if (mem_ctx)
 124                 talloc_destroy(mem_ctx);
 125
 126         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 127 }
 128
 129 #ifdef WITH_WINBIND_AUTH_CRAP
 130 /* Challenge Response Authentication Protocol */
 131
 132 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 133 {
 134         NTSTATUS result;
 135         unsigned char trust_passwd[16];
 136         time_t last_change_time;
 137         NET_USER_INFO_3 info3;
 138         struct cli_state *cli = NULL;
 139         TALLOC_CTX *mem_ctx = NULL;
 140         const char *domain = NULL;
 141
 142         DATA_BLOB lm_resp, nt_resp;
 143
 144         extern pstring global_myname;
 145
 146         DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
 147                   state->request.data.auth_crap.domain, state->request.data.auth_crap.user));
 148
 149         if (!(mem_ctx = talloc_init_named("winbind pam auth crap for %s", state->request.data.auth.user))) {
 150                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 151                 result = NT_STATUS_NO_MEMORY;
 152                 goto done;
 153         }
 154
 155         if (*state->request.data.auth_crap.domain) {
 156                 domain = talloc_strdup(mem_ctx, state->request.data.auth_crap.domain);
 157         } else if (lp_winbind_use_default_domain()) {
 158                 domain = talloc_strdup(mem_ctx, lp_workgroup());
 159         } else {
 160                 DEBUG(5,("no domain specified with username (%s) - failing auth\n", state->request.data.auth.user));
 161                 result = NT_STATUS_INVALID_PARAMETER;
 162                 goto done;
 163         }
 164
 165         if (!domain) {
 166                 DEBUG(0,("winbindd_pam_auth_crap: talloc_strdup failed!\n"));
 167                 result = NT_STATUS_NO_MEMORY;
 168                 goto done;
 169         }
 170
 171         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 172         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 173
 174         /*
 175          * Get the machine account password for our primary domain
 176          */
 177
 178         if (!secrets_fetch_trust_account_password(
 179                 lp_workgroup(), trust_passwd, &last_change_time)) {
 180                 DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
 181                           "password for domain %s\n", lp_workgroup()));
 182                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 183                 goto done;
 184         }
 185
 186         ZERO_STRUCT(info3);
 187
 188         /* Don't shut this down - it belongs to the connection cache code */
 189         result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
 190
 191         if (!NT_STATUS_IS_OK(result)) {
 192                 DEBUG(3, ("could not open handle to NETLOGON pipe (%s)\n", nt_errstr(result)));
 193                 goto done;
 194         }
 195
 196         result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 197                                                 state->request.data.auth_crap.user, domain,
 198                                                 global_myname, state->request.data.auth_crap.chal,
 199                                                 lm_resp, nt_resp,
 200                                                 &info3);
 201
 202 done:
 203
 204         state->response.data.auth.nt_status = NT_STATUS_V(result);
 205         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 206         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 207         state->response.data.auth.pam_error = nt_status_to_pam(result);
 208
 209         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("NTLM CRAP authenticaion for user [%s]\\[%s] returned %s (PAM: %d)\n",
 210               state->request.data.auth_crap.domain,
 211               state->request.data.auth_crap.user,
 212               state->response.data.auth.nt_status_string,
 213               state->response.data.auth.pam_error));
 214
 215         if (mem_ctx)
 216                 talloc_destroy(mem_ctx);
 217
 218         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 219 }
 220
 221 #endif  /* WITH_WINBIND_AUTH_CRAP */
 222
 223 /* Change a user password */
 224
 225 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 226 {
 227         NTSTATUS result;
 228         char *oldpass, *newpass;
 229         fstring domain, user;
 230         CLI_POLICY_HND *hnd;
 231
 232         DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
 233                 state->request.data.chauthtok.user));
 234
 235         /* Setup crap */
 236
 237         if (state == NULL)
 238                 return WINBINDD_ERROR;
 239
 240         if (!parse_domain_user(state->request.data.chauthtok.user, domain,
 241                                user)) {
 242                 result = NT_STATUS_INVALID_PARAMETER;
 243                 goto done;
 244         }
 245
 246         /* Change password */
 247
 248         oldpass = state->request.data.chauthtok.oldpass;
 249         newpass = state->request.data.chauthtok.newpass;
 250
 251         /* Get sam handle */
 252
 253         if (!(hnd = cm_get_sam_handle(domain))) {
 254                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
 255                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
 256                 goto done;
 257         }
 258
 259         if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
 260                 DEBUG(1, ("password change failed for user %s/%s\n", domain,
 261                           user));
 262                 result = NT_STATUS_WRONG_PASSWORD;
 263         } else {
 264                 result = NT_STATUS_OK;
 265         }
 266
 267 done:
 268         state->response.data.auth.nt_status = NT_STATUS_V(result);
 269         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 270         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 271         state->response.data.auth.pam_error = nt_status_to_pam(result);
 272
 273         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 274 }