source/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 "lib/ldb/include/ldb.h"
  27 #include "lib/ldb/include/ldb_errors.h"
  28 #include "dsdb/samdb/samdb.h"
  29
  30 static NTSTATUS ldapsrv_BindSimple(struct ldapsrv_call *call)
  31 {
  32         struct ldap_BindRequest *req = &call->request->r.BindRequest;
  33         struct ldapsrv_reply *reply;
  34         struct ldap_BindResponse *resp;
  35
  36         int result;
  37         const char *errstr;
  38         const char *nt4_domain, *nt4_account;
  39
  40         struct auth_session_info *session_info;
  41
  42         NTSTATUS status;
  43
  44         DEBUG(10, ("BindSimple dn: %s\n",req->dn));
  45
  46         status = crack_dn_to_nt4_name(call, req->dn, &nt4_domain, &nt4_account);
  47         if (NT_STATUS_IS_OK(status)) {
  48                 status = authenticate_username_pw(call, nt4_domain, nt4_account,
  49                                                   req->creds.password, &session_info);
  50         }
  51
  52         /* When we add authentication here, we also need to handle telling the backends */
  53
  54         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  55         if (!reply) {
  56                 return NT_STATUS_NO_MEMORY;
  57         }
  58
  59         if (NT_STATUS_IS_OK(status)) {
  60                 result = LDAP_SUCCESS;
  61                 errstr = NULL;
  62
  63                 talloc_free(call->conn->session_info);
  64                 call->conn->session_info = session_info;
  65
  66                 /* don't leak the old LDB */
  67                 talloc_free(call->conn->ldb);
  68
  69                 status = ldapsrv_backend_Init(call->conn);
  70
  71                 if (!NT_STATUS_IS_OK(status)) {
  72                         result = LDAP_OPERATIONS_ERROR;
  73                         errstr = talloc_asprintf(reply, "Simple Bind: Failed to advise ldb new credentials: %s", nt_errstr(status));
  74                 }
  75         } else {
  76                 status = auth_nt_status_squash(status);
  77
  78                 result = LDAP_INVALID_CREDENTIALS;
  79                 errstr = talloc_asprintf(reply, "Simple Bind Failed: %s", nt_errstr(status));
  80         }
  81
  82         resp = &reply->msg->r.BindResponse;
  83         resp->response.resultcode = result;
  84         resp->response.errormessage = errstr;
  85         resp->response.dn = NULL;
  86         resp->response.referral = NULL;
  87
  88         /* This looks wrong... */
  89         resp->SASL.secblob = data_blob(NULL, 0);
  90
  91         ldapsrv_queue_reply(call, reply);
  92         return NT_STATUS_OK;
  93 }
  94
  95 static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
  96 {
  97         struct ldap_BindRequest *req = &call->request->r.BindRequest;
  98         struct ldapsrv_reply *reply;
  99         struct ldap_BindResponse *resp;
 100         struct ldapsrv_connection *conn;
 101         int result;
 102         const char *errstr;
 103         NTSTATUS status = NT_STATUS_OK;
 104
 105         DEBUG(10, ("BindSASL dn: %s\n",req->dn));
 106
 107         if (!call->conn->gensec) {
 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                 gensec_set_credentials(call->conn->gensec, call->conn->server_credentials);
 120
 121                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SIGN);
 122                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SEAL);
 123                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_ASYNC_REPLIES);
 124
 125                 status = gensec_start_mech_by_sasl_name(call->conn->gensec, req->creds.SASL.mechanism);
 126                 if (!NT_STATUS_IS_OK(status)) {
 127                         DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
 128                                 req->creds.SASL.mechanism, nt_errstr(status)));
 129                 }
 130         }
 131
 132         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 133         if (!reply) {
 134                 return NT_STATUS_NO_MEMORY;
 135         }
 136         resp = &reply->msg->r.BindResponse;
 137
 138         conn = call->conn;
 139
 140         if (NT_STATUS_IS_OK(status)) {
 141                 status = gensec_update(call->conn->gensec, reply,
 142                                        req->creds.SASL.secblob, &resp->SASL.secblob);
 143         }
 144
 145         if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
 146                 result = LDAP_SASL_BIND_IN_PROGRESS;
 147                 errstr = NULL;
 148         } else if (NT_STATUS_IS_OK(status)) {
 149                 struct auth_session_info *old_session_info;
 150
 151                 result = LDAP_SUCCESS;
 152                 errstr = NULL;
 153                 if (gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SEAL) ||
 154                     gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SIGN)) {
 155                         call->conn->enable_wrap = True;
 156                 }
 157                 old_session_info = call->conn->session_info;
 158                 call->conn->session_info = NULL;
 159                 status = gensec_session_info(call->conn->gensec, &call->conn->session_info);
 160                 if (!NT_STATUS_IS_OK(status)) {
 161                         call->conn->session_info = old_session_info;
 162                         result = LDAP_OPERATIONS_ERROR;
 163                         errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to get session info: %s", req->creds.SASL.mechanism, nt_errstr(status));
 164                 } else {
 165                         talloc_free(old_session_info);
 166
 167                         /* don't leak the old LDB */
 168                         talloc_free(call->conn->ldb);
 169
 170                         status = ldapsrv_backend_Init(call->conn);
 171
 172                         if (!NT_STATUS_IS_OK(status)) {
 173                                 result = LDAP_OPERATIONS_ERROR;
 174                                 errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to advise samdb of new credentials: %s", req->creds.SASL.mechanism, nt_errstr(status));
 175                         }
 176                 }
 177         } else {
 178                 status = auth_nt_status_squash(status);
 179                 result = LDAP_INVALID_CREDENTIALS;
 180                 errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
 181         }
 182
 183         resp->response.resultcode = result;
 184         resp->response.dn = NULL;
 185         resp->response.errormessage = errstr;
 186         resp->response.referral = NULL;
 187
 188         ldapsrv_queue_reply(call, reply);
 189         return NT_STATUS_OK;
 190 }
 191
 192 NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
 193 {
 194         struct ldap_BindRequest *req = &call->request->r.BindRequest;
 195         struct ldapsrv_reply *reply;
 196         struct ldap_BindResponse *resp;
 197
 198         switch (req->mechanism) {
 199                 case LDAP_AUTH_MECH_SIMPLE:
 200                         return ldapsrv_BindSimple(call);
 201                 case LDAP_AUTH_MECH_SASL:
 202                         return ldapsrv_BindSASL(call);
 203         }
 204
 205         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 206         if (!reply) {
 207                 return NT_STATUS_NO_MEMORY;
 208         }
 209
 210         resp = &reply->msg->r.BindResponse;
 211         resp->response.resultcode = 7;
 212         resp->response.dn = NULL;
 213         resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
 214         resp->response.referral = NULL;
 215         resp->SASL.secblob = data_blob(NULL, 0);
 216
 217         ldapsrv_queue_reply(call, reply);
 218         return NT_STATUS_OK;
 219 }
 220
 221 NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
 222 {
 223         DEBUG(10, ("UnbindRequest\n"));
 224         return NT_STATUS_OK;
 225 }