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
  27 static NTSTATUS ldapsrv_BindSimple(struct ldapsrv_call *call)
  28 {
  29         struct ldap_BindRequest *req = &call->request->r.BindRequest;
  30         struct ldapsrv_reply *reply;
  31         struct ldap_BindResponse *resp;
  32
  33         DEBUG(10, ("BindSimple dn: %s\n",req->dn));
  34
  35         /* When we add authentication here, we also need to handle telling the backends */
  36
  37         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  38         if (!reply) {
  39                 return NT_STATUS_NO_MEMORY;
  40         }
  41
  42         resp = &reply->msg->r.BindResponse;
  43         resp->response.resultcode = 0;
  44         resp->response.dn = NULL;
  45         resp->response.errormessage = NULL;
  46         resp->response.referral = NULL;
  47         resp->SASL.secblob = data_blob(NULL, 0);
  48
  49         ldapsrv_queue_reply(call, reply);
  50         return NT_STATUS_OK;
  51 }
  52
  53 static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
  54 {
  55         struct ldap_BindRequest *req = &call->request->r.BindRequest;
  56         struct ldapsrv_reply *reply;
  57         struct ldap_BindResponse *resp;
  58         struct ldapsrv_connection *conn;
  59         int result;
  60         const char *errstr;
  61         NTSTATUS status = NT_STATUS_OK;
  62
  63         DEBUG(10, ("BindSASL dn: %s\n",req->dn));
  64
  65         if (!call->conn->gensec) {
  66                 struct cli_credentials *server_credentials;
  67                 call->conn->session_info = NULL;
  68
  69                 status = gensec_server_start(call->conn, &call->conn->gensec,
  70                                              call->conn->connection->event.ctx);
  71                 if (!NT_STATUS_IS_OK(status)) {
  72                         DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
  73                         return status;
  74                 }
  75
  76                 gensec_set_target_service(call->conn->gensec, "ldap");
  77
  78                 server_credentials
  79                         = cli_credentials_init(call);
  80                 if (!server_credentials) {
  81                         DEBUG(1, ("Failed to init server credentials\n"));
  82                         return NT_STATUS_NO_MEMORY;
  83                 }
  84
  85                 cli_credentials_set_conf(server_credentials);
  86                 status = cli_credentials_set_machine_account(server_credentials);
  87                 if (!NT_STATUS_IS_OK(status)) {
  88                         DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
  89                         talloc_free(server_credentials);
  90                         server_credentials = NULL;
  91                 }
  92
  93                 gensec_set_credentials(call->conn->gensec, server_credentials);
  94
  95                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SIGN);
  96                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SEAL);
  97                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_ASYNC_REPLIES);
  98
  99                 status = gensec_start_mech_by_sasl_name(call->conn->gensec, req->creds.SASL.mechanism);
 100                 if (!NT_STATUS_IS_OK(status)) {
 101                         DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
 102                                 req->creds.SASL.mechanism, nt_errstr(status)));
 103                 }
 104         }
 105
 106         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 107         if (!reply) {
 108                 return NT_STATUS_NO_MEMORY;
 109         }
 110         resp = &reply->msg->r.BindResponse;
 111
 112         conn = call->conn;
 113
 114         if (NT_STATUS_IS_OK(status)) {
 115                 status = gensec_update(call->conn->gensec, reply,
 116                                        req->creds.SASL.secblob, &resp->SASL.secblob);
 117         }
 118
 119         if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
 120                 result = LDAP_SASL_BIND_IN_PROGRESS;
 121                 errstr = NULL;
 122         } else if (NT_STATUS_IS_OK(status)) {
 123                 struct ldapsrv_partition *part;
 124                 struct auth_session_info *old_session_info;
 125
 126                 result = LDAP_SUCCESS;
 127                 errstr = NULL;
 128                 if (gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SEAL) ||
 129                     gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SIGN)) {
 130                         call->conn->enable_wrap = True;
 131                 }
 132                 old_session_info = call->conn->session_info;
 133                 call->conn->session_info = NULL;
 134                 status = gensec_session_info(call->conn->gensec, &call->conn->session_info);
 135                 if (!NT_STATUS_IS_OK(status)) {
 136                         call->conn->session_info = old_session_info;
 137                         result = LDAP_OPERATIONS_ERROR;
 138                         errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to get session info: %s", req->creds.SASL.mechanism, nt_errstr(status));
 139                 } else {
 140                         talloc_free(old_session_info);
 141                         for (part = call->conn->partitions; part; part = part->next) {
 142                                 if (!part->ops->Bind) {
 143                                         continue;
 144                                 }
 145                                 status = part->ops->Bind(part, conn);
 146                                 if (!NT_STATUS_IS_OK(status)) {
 147                                         result = LDAP_OPERATIONS_ERROR;
 148                                         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));
 149                                 }
 150                         }
 151                 }
 152         } else {
 153                 status = auth_nt_status_squash(status);
 154                 result = LDAP_INVALID_CREDENTIALS;
 155                 errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
 156         }
 157
 158         resp->response.resultcode = result;
 159         resp->response.dn = NULL;
 160         resp->response.errormessage = errstr;
 161         resp->response.referral = NULL;
 162
 163         ldapsrv_queue_reply(call, reply);
 164         return NT_STATUS_OK;
 165 }
 166
 167 NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
 168 {
 169         struct ldap_BindRequest *req = &call->request->r.BindRequest;
 170         struct ldapsrv_reply *reply;
 171         struct ldap_BindResponse *resp;
 172
 173         switch (req->mechanism) {
 174                 case LDAP_AUTH_MECH_SIMPLE:
 175                         return ldapsrv_BindSimple(call);
 176                 case LDAP_AUTH_MECH_SASL:
 177                         return ldapsrv_BindSASL(call);
 178         }
 179
 180         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 181         if (!reply) {
 182                 return NT_STATUS_NO_MEMORY;
 183         }
 184
 185         resp = &reply->msg->r.BindResponse;
 186         resp->response.resultcode = 7;
 187         resp->response.dn = NULL;
 188         resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
 189         resp->response.referral = NULL;
 190         resp->SASL.secblob = data_blob(NULL, 0);
 191
 192         ldapsrv_queue_reply(call, reply);
 193         return NT_STATUS_OK;
 194 }
 195
 196 NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
 197 {
 198         DEBUG(10, ("UnbindRequest\n"));
 199         return NT_STATUS_OK;
 200 }