source4/auth/ntlm/auth_winbind.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind authentication mechnism
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Andrew Bartlett 2001 - 2002
   8    Copyright (C) Stefan Metzmacher 2005
   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 3 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, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "auth/auth.h"
  26 #include "auth/ntlm/auth_proto.h"
  27 #include "librpc/gen_ndr/ndr_winbind_c.h"
  28 #include "lib/messaging/irpc.h"
  29 #include "param/param.h"
  30 #include "nsswitch/libwbclient/wbclient.h"
  31 #include "auth/auth_sam_reply.h"
  32 #include "libcli/security/security.h"
  33
  34 _PUBLIC_ NTSTATUS auth4_winbind_init(void);
  35
  36 static NTSTATUS winbind_want_check(struct auth_method_context *ctx,
  37                                    TALLOC_CTX *mem_ctx,
  38                                    const struct auth_usersupplied_info *user_info)
  39 {
  40         if (!user_info->mapped.account_name || !*user_info->mapped.account_name) {
  41                 return NT_STATUS_NOT_IMPLEMENTED;
  42         }
  43
  44         /* TODO: maybe limit the user scope to remote users only */
  45         return NT_STATUS_OK;
  46 }
  47
  48 struct winbind_check_password_state {
  49         struct winbind_SamLogon req;
  50 };
  51
  52 /*
  53  Authenticate a user with a challenge/response
  54  using IRPC to the winbind task
  55 */
  56 static NTSTATUS winbind_check_password(struct auth_method_context *ctx,
  57                                        TALLOC_CTX *mem_ctx,
  58                                        const struct auth_usersupplied_info *user_info,
  59                                        struct auth_user_info_dc **user_info_dc)
  60 {
  61         NTSTATUS status;
  62         struct dcerpc_binding_handle *irpc_handle;
  63         struct winbind_check_password_state *s;
  64         const struct auth_usersupplied_info *user_info_new;
  65         struct netr_IdentityInfo *identity_info;
  66
  67         if (!ctx->auth_ctx->msg_ctx) {
  68                 DEBUG(0,("winbind_check_password: auth_context_create was called with out messaging context\n"));
  69                 return NT_STATUS_INTERNAL_ERROR;
  70         }
  71
  72         s = talloc(mem_ctx, struct winbind_check_password_state);
  73         NT_STATUS_HAVE_NO_MEMORY(s);
  74
  75         irpc_handle = irpc_binding_handle_by_name(s, ctx->auth_ctx->msg_ctx,
  76                                                   "winbind_server",
  77                                                   &ndr_table_winbind);
  78         if (irpc_handle == NULL) {
  79                 DEBUG(0, ("Winbind authentication for [%s]\\[%s] failed, "
  80                           "no winbind_server running!\n",
  81                           user_info->client.domain_name, user_info->client.account_name));
  82                 return NT_STATUS_NO_LOGON_SERVERS;
  83         }
  84
  85         if (user_info->flags & USER_INFO_INTERACTIVE_LOGON) {
  86                 struct netr_PasswordInfo *password_info;
  87
  88                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_HASH,
  89                                            user_info, &user_info_new);
  90                 NT_STATUS_NOT_OK_RETURN(status);
  91                 user_info = user_info_new;
  92
  93                 password_info = talloc(s, struct netr_PasswordInfo);
  94                 NT_STATUS_HAVE_NO_MEMORY(password_info);
  95
  96                 password_info->lmpassword = *user_info->password.hash.lanman;
  97                 password_info->ntpassword = *user_info->password.hash.nt;
  98
  99                 identity_info = &password_info->identity_info;
 100                 s->req.in.logon_level   = 1;
 101                 s->req.in.logon.password= password_info;
 102         } else {
 103                 struct netr_NetworkInfo *network_info;
 104                 uint8_t chal[8];
 105
 106                 status = encrypt_user_info(s, ctx->auth_ctx, AUTH_PASSWORD_RESPONSE,
 107                                            user_info, &user_info_new);
 108                 NT_STATUS_NOT_OK_RETURN(status);
 109                 user_info = user_info_new;
 110
 111                 network_info = talloc(s, struct netr_NetworkInfo);
 112                 NT_STATUS_HAVE_NO_MEMORY(network_info);
 113
 114                 status = auth_get_challenge(ctx->auth_ctx, chal);
 115                 NT_STATUS_NOT_OK_RETURN(status);
 116
 117                 memcpy(network_info->challenge, chal, sizeof(network_info->challenge));
 118
 119                 network_info->nt.length = user_info->password.response.nt.length;
 120                 network_info->nt.data   = user_info->password.response.nt.data;
 121
 122                 network_info->lm.length = user_info->password.response.lanman.length;
 123                 network_info->lm.data   = user_info->password.response.lanman.data;
 124
 125                 identity_info = &network_info->identity_info;
 126                 s->req.in.logon_level   = 2;
 127                 s->req.in.logon.network = network_info;
 128         }
 129
 130         identity_info->domain_name.string       = user_info->client.domain_name;
 131         identity_info->parameter_control        = user_info->logon_parameters; /* see MSV1_0_* */
 132         identity_info->logon_id_low             = 0;
 133         identity_info->logon_id_high            = 0;
 134         identity_info->account_name.string      = user_info->client.account_name;
 135         identity_info->workstation.string       = user_info->workstation_name;
 136
 137         s->req.in.validation_level      = 3;
 138
 139         /* Note: this makes use of nested event loops... */
 140         dcerpc_binding_handle_set_sync_ev(irpc_handle, ctx->auth_ctx->event_ctx);
 141         status = dcerpc_winbind_SamLogon_r(irpc_handle, s, &s->req);
 142         NT_STATUS_NOT_OK_RETURN(status);
 143
 144         status = make_user_info_dc_netlogon_validation(mem_ctx,
 145                                                       user_info->client.account_name,
 146                                                       s->req.in.validation_level,
 147                                                       &s->req.out.validation,
 148                                                        true, /* This user was authenticated */
 149                                                       user_info_dc);
 150         NT_STATUS_NOT_OK_RETURN(status);
 151
 152         return NT_STATUS_OK;
 153 }
 154
 155 /*
 156  Authenticate a user with a challenge/response
 157  using the samba3 winbind protocol via libwbclient
 158 */
 159 static NTSTATUS winbind_check_password_wbclient(struct auth_method_context *ctx,
 160                                                 TALLOC_CTX *mem_ctx,
 161                                                 const struct auth_usersupplied_info *user_info,
 162                                                 struct auth_user_info_dc **user_info_dc)
 163 {
 164         struct wbcAuthUserParams params;
 165         struct wbcAuthUserInfo *info = NULL;
 166         struct wbcAuthErrorInfo *err = NULL;
 167         wbcErr wbc_status;
 168         NTSTATUS nt_status;
 169         struct netr_SamInfo3 *info3;
 170         union netr_Validation validation;
 171
 172
 173         /* Send off request */
 174         const struct auth_usersupplied_info *user_info_temp;
 175         nt_status = encrypt_user_info(mem_ctx, ctx->auth_ctx,
 176                                       AUTH_PASSWORD_RESPONSE,
 177                                       user_info, &user_info_temp);
 178         if (!NT_STATUS_IS_OK(nt_status)) {
 179                 return nt_status;
 180         }
 181         user_info = user_info_temp;
 182
 183         ZERO_STRUCT(params);
 184         ZERO_STRUCT(info3);
 185         /*params.flags = WBFLAG_PAM_INFO3_NDR;*/
 186
 187         params.parameter_control = user_info->logon_parameters;
 188         params.parameter_control |= WBC_MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT |
 189                                     WBC_MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT;
 190         params.level = WBC_AUTH_USER_LEVEL_RESPONSE;
 191
 192         params.account_name     = user_info->client.account_name;
 193         params.domain_name      = user_info->client.domain_name;
 194         params.workstation_name = user_info->workstation_name;
 195
 196         d_fprintf(stderr, "looking up %s@%s logging in from %s\n",
 197                   params.account_name, params.domain_name,
 198                   params.workstation_name);
 199
 200         memcpy(params.password.response.challenge,
 201                ctx->auth_ctx->challenge.data.data,
 202                sizeof(params.password.response.challenge));
 203
 204         params.password.response.lm_length =
 205                 user_info->password.response.lanman.length;
 206         params.password.response.nt_length =
 207                 user_info->password.response.nt.length;
 208
 209         params.password.response.lm_data =
 210                 user_info->password.response.lanman.data;
 211         params.password.response.nt_data =
 212                 user_info->password.response.nt.data;
 213
 214         wbc_status = wbcAuthenticateUserEx(&params, &info, &err);
 215         if (wbc_status == WBC_ERR_AUTH_ERROR) {
 216                 DEBUG(1, ("error was %s (0x%08x)\nerror message was '%s'\n",
 217                       err->nt_string, err->nt_status, err->display_string));
 218
 219                 nt_status = NT_STATUS(err->nt_status);
 220                 wbcFreeMemory(err);
 221                 NT_STATUS_NOT_OK_RETURN(nt_status);
 222         } else if (!WBC_ERROR_IS_OK(wbc_status)) {
 223                 DEBUG(1, ("wbcAuthenticateUserEx: failed with %u - %s\n",
 224                         wbc_status, wbcErrorString(wbc_status)));
 225                 return NT_STATUS_LOGON_FAILURE;
 226         }
 227         info3 = wbcAuthUserInfo_to_netr_SamInfo3(mem_ctx, info);
 228         wbcFreeMemory(info);
 229         if (!info3) {
 230                 DEBUG(1, ("wbcAuthUserInfo_to_netr_SamInfo3 failed\n"));
 231                 return NT_STATUS_NO_MEMORY;
 232         }
 233
 234         validation.sam3 = info3;
 235         nt_status = make_user_info_dc_netlogon_validation(mem_ctx,
 236                                                           user_info->client.account_name,
 237                                                           3, &validation,
 238                                                           true, /* This user was authenticated */
 239                                                           user_info_dc);
 240         return nt_status;
 241
 242 }
 243
 244 static const struct auth_operations winbind_ops = {
 245         .name           = "winbind",
 246         .want_check     = winbind_want_check,
 247         .check_password = winbind_check_password
 248 };
 249
 250 static const struct auth_operations winbind_wbclient_ops = {
 251         .name           = "winbind_wbclient",
 252         .want_check     = winbind_want_check,
 253         .check_password = winbind_check_password_wbclient
 254 };
 255
 256 _PUBLIC_ NTSTATUS auth4_winbind_init(void)
 257 {
 258         NTSTATUS ret;
 259
 260         ret = auth_register(&winbind_ops);
 261         if (!NT_STATUS_IS_OK(ret)) {
 262                 DEBUG(0,("Failed to register 'winbind' auth backend!\n"));
 263                 return ret;
 264         }
 265
 266         ret = auth_register(&winbind_wbclient_ops);
 267         if (!NT_STATUS_IS_OK(ret)) {
 268                 DEBUG(0,("Failed to register 'winbind_wbclient' auth backend!\n"));
 269                 return ret;
 270         }
 271
 272         return NT_STATUS_OK;
 273 }