source4/ldap_server/ldap_bind.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    LDAP server
   4    Copyright (C) Stefan Metzmacher 2004
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19 */
  20
  21 #include "includes.h"
  22 #include "ldap_server/ldap_server.h"
  23 #include "auth/auth.h"
  24 #include "libcli/ldap/ldap.h"
  25 #include "smbd/service_stream.h"
  26 #include "dsdb/samdb/samdb.h"
  27
  28 static NTSTATUS ldapsrv_BindSimple(struct ldapsrv_call *call)
  29 {
  30         struct ldap_BindRequest *req = &call->request->r.BindRequest;
  31         struct ldapsrv_reply *reply;
  32         struct ldap_BindResponse *resp;
  33
  34         int result;
  35         const char *errstr;
  36         const char *nt4_domain, *nt4_account;
  37
  38         struct auth_session_info *session_info;
  39
  40         NTSTATUS status;
  41
  42         DEBUG(10, ("BindSimple dn: %s\n",req->dn));
  43
  44         status = crack_dn_to_nt4_name(call, req->dn, &nt4_domain, &nt4_account);
  45         if (NT_STATUS_IS_OK(status)) {
  46                 status = authenticate_username_pw(call, nt4_domain, nt4_account,
  47                                                   req->creds.password, &session_info);
  48         }
  49
  50         /* When we add authentication here, we also need to handle telling the backends */
  51
  52         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  53         if (!reply) {
  54                 return NT_STATUS_NO_MEMORY;
  55         }
  56
  57         if (NT_STATUS_IS_OK(status)) {
  58                 struct ldapsrv_partition *part;
  59                 result = LDAP_SUCCESS;
  60                 errstr = NULL;
  61
  62                 talloc_free(call->conn->session_info);
  63                 call->conn->session_info = session_info;
  64                 for (part = call->conn->partitions; part; part = part->next) {
  65                         if (!part->ops->Bind) {
  66                                 continue;
  67                         }
  68                         status = part->ops->Bind(part, call->conn);
  69                         if (!NT_STATUS_IS_OK(status)) {
  70                                 result = LDAP_OPERATIONS_ERROR;
  71                                 errstr = talloc_asprintf(reply, "Simple Bind: Failed to advise partition %s of new credentials: %s", part->base_dn, nt_errstr(status));
  72                         }
  73                 }
  74         } else {
  75                 status = auth_nt_status_squash(status);
  76
  77                 result = LDAP_INVALID_CREDENTIALS;
  78                 errstr = talloc_asprintf(reply, "Simple Bind Failed: %s", nt_errstr(status));
  79         }
  80
  81         resp = &reply->msg->r.BindResponse;
  82         resp->response.resultcode = result;
  83         resp->response.errormessage = errstr;
  84         resp->response.dn = NULL;
  85         resp->response.referral = NULL;
  86
  87         /* This looks wrong... */
  88         resp->SASL.secblob = data_blob(NULL, 0);
  89
  90         ldapsrv_queue_reply(call, reply);
  91         return NT_STATUS_OK;
  92 }
  93
  94 static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
  95 {
  96         struct ldap_BindRequest *req = &call->request->r.BindRequest;
  97         struct ldapsrv_reply *reply;
  98         struct ldap_BindResponse *resp;
  99         struct ldapsrv_connection *conn;
 100         int result;
 101         const char *errstr;
 102         NTSTATUS status = NT_STATUS_OK;
 103
 104         DEBUG(10, ("BindSASL dn: %s\n",req->dn));
 105
 106         if (!call->conn->gensec) {
 107                 struct cli_credentials *server_credentials;
 108                 call->conn->session_info = NULL;
 109
 110                 status = gensec_server_start(call->conn, &call->conn->gensec,
 111                                              call->conn->connection->event.ctx);
 112                 if (!NT_STATUS_IS_OK(status)) {
 113                         DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
 114                         return status;
 115                 }
 116
 117                 gensec_set_target_service(call->conn->gensec, "ldap");
 118
 119                 server_credentials
 120                         = cli_credentials_init(call);
 121                 if (!server_credentials) {
 122                         DEBUG(1, ("Failed to init server credentials\n"));
 123                         return NT_STATUS_NO_MEMORY;
 124                 }
 125
 126                 cli_credentials_set_conf(server_credentials);
 127                 status = cli_credentials_set_machine_account(server_credentials);
 128                 if (!NT_STATUS_IS_OK(status)) {
 129                         DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
 130                         talloc_free(server_credentials);
 131                         server_credentials = NULL;
 132                 }
 133
 134                 gensec_set_credentials(call->conn->gensec, server_credentials);
 135
 136                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SIGN);
 137                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SEAL);
 138                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_ASYNC_REPLIES);
 139
 140                 status = gensec_start_mech_by_sasl_name(call->conn->gensec, req->creds.SASL.mechanism);
 141                 if (!NT_STATUS_IS_OK(status)) {
 142                         DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
 143                                 req->creds.SASL.mechanism, nt_errstr(status)));
 144                 }
 145         }
 146
 147         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 148         if (!reply) {
 149                 return NT_STATUS_NO_MEMORY;
 150         }
 151         resp = &reply->msg->r.BindResponse;
 152
 153         conn = call->conn;
 154
 155         if (NT_STATUS_IS_OK(status)) {
 156                 status = gensec_update(call->conn->gensec, reply,
 157                                        req->creds.SASL.secblob, &resp->SASL.secblob);
 158         }
 159
 160         if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
 161                 result = LDAP_SASL_BIND_IN_PROGRESS;
 162                 errstr = NULL;
 163         } else if (NT_STATUS_IS_OK(status)) {
 164                 struct ldapsrv_partition *part;
 165                 struct auth_session_info *old_session_info;
 166
 167                 result = LDAP_SUCCESS;
 168                 errstr = NULL;
 169                 if (gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SEAL) ||
 170                     gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SIGN)) {
 171                         call->conn->enable_wrap = True;
 172                 }
 173                 old_session_info = call->conn->session_info;
 174                 call->conn->session_info = NULL;
 175                 status = gensec_session_info(call->conn->gensec, &call->conn->session_info);
 176                 if (!NT_STATUS_IS_OK(status)) {
 177                         call->conn->session_info = old_session_info;
 178                         result = LDAP_OPERATIONS_ERROR;
 179                         errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to get session info: %s", req->creds.SASL.mechanism, nt_errstr(status));
 180                 } else {
 181                         talloc_free(old_session_info);
 182                         for (part = call->conn->partitions; part; part = part->next) {
 183                                 if (!part->ops->Bind) {
 184                                         continue;
 185                                 }
 186                                 status = part->ops->Bind(part, conn);
 187                                 if (!NT_STATUS_IS_OK(status)) {
 188                                         result = LDAP_OPERATIONS_ERROR;
 189                                         errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to advise partition %s of new credentials: %s", req->creds.SASL.mechanism, part->base_dn, nt_errstr(status));
 190                                 }
 191                         }
 192                 }
 193         } else {
 194                 status = auth_nt_status_squash(status);
 195                 result = LDAP_INVALID_CREDENTIALS;
 196                 errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
 197         }
 198
 199         resp->response.resultcode = result;
 200         resp->response.dn = NULL;
 201         resp->response.errormessage = errstr;
 202         resp->response.referral = NULL;
 203
 204         ldapsrv_queue_reply(call, reply);
 205         return NT_STATUS_OK;
 206 }
 207
 208 NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
 209 {
 210         struct ldap_BindRequest *req = &call->request->r.BindRequest;
 211         struct ldapsrv_reply *reply;
 212         struct ldap_BindResponse *resp;
 213
 214         switch (req->mechanism) {
 215                 case LDAP_AUTH_MECH_SIMPLE:
 216                         return ldapsrv_BindSimple(call);
 217                 case LDAP_AUTH_MECH_SASL:
 218                         return ldapsrv_BindSASL(call);
 219         }
 220
 221         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 222         if (!reply) {
 223                 return NT_STATUS_NO_MEMORY;
 224         }
 225
 226         resp = &reply->msg->r.BindResponse;
 227         resp->response.resultcode = 7;
 228         resp->response.dn = NULL;
 229         resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
 230         resp->response.referral = NULL;
 231         resp->SASL.secblob = data_blob(NULL, 0);
 232
 233         ldapsrv_queue_reply(call, reply);
 234         return NT_STATUS_OK;
 235 }
 236
 237 NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
 238 {
 239         DEBUG(10, ("UnbindRequest\n"));
 240         return NT_STATUS_OK;
 241 }