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                 call->conn->session_info = NULL;
  67
  68                 status = gensec_server_start(call->conn, &call->conn->gensec,
  69                                              call->conn->connection->event.ctx);
  70                 if (!NT_STATUS_IS_OK(status)) {
  71                         DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
  72                         return status;
  73                 }
  74
  75                 gensec_set_target_service(call->conn->gensec, "ldap");
  76
  77                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SIGN);
  78                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SEAL);
  79                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_ASYNC_REPLIES);
  80
  81                 status = gensec_start_mech_by_sasl_name(call->conn->gensec, req->creds.SASL.mechanism);
  82                 if (!NT_STATUS_IS_OK(status)) {
  83                         DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
  84                                 req->creds.SASL.mechanism, nt_errstr(status)));
  85                         goto reply;
  86                 }
  87         }
  88
  89 reply:
  90         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  91         if (!reply) {
  92                 return NT_STATUS_NO_MEMORY;
  93         }
  94         resp = &reply->msg->r.BindResponse;
  95
  96         conn = call->conn;
  97
  98         if (NT_STATUS_IS_OK(status)) {
  99                 status = gensec_update(call->conn->gensec, reply,
 100                                        req->creds.SASL.secblob, &resp->SASL.secblob);
 101         }
 102
 103         if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
 104                 result = LDAP_SASL_BIND_IN_PROGRESS;
 105                 errstr = NULL;
 106         } else if (NT_STATUS_IS_OK(status)) {
 107                 struct ldapsrv_partition *part;
 108                 struct auth_session_info *old_session_info;
 109
 110                 result = LDAP_SUCCESS;
 111                 errstr = NULL;
 112                 if (gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SEAL) ||
 113                     gensec_have_feature(call->conn->gensec, GENSEC_FEATURE_SIGN)) {
 114                         call->conn->enable_wrap = True;
 115                 }
 116                 old_session_info = call->conn->session_info;
 117                 call->conn->session_info = NULL;
 118                 status = gensec_session_info(call->conn->gensec, &call->conn->session_info);
 119                 if (!NT_STATUS_IS_OK(status)) {
 120                         call->conn->session_info = old_session_info;
 121                         result = LDAP_OPERATIONS_ERROR;
 122                         errstr = talloc_asprintf(reply, "SASL:[%s]: Failed to get session info: %s", req->creds.SASL.mechanism, nt_errstr(status));
 123                 } else {
 124                         talloc_free(old_session_info);
 125                         for (part = call->conn->partitions; part; part = part->next) {
 126                                 if (!part->ops->Bind) {
 127                                         continue;
 128                                 }
 129                                 status = part->ops->Bind(part, conn);
 130                                 if (!NT_STATUS_IS_OK(status)) {
 131                                         result = LDAP_OPERATIONS_ERROR;
 132                                         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));
 133                                 }
 134                         }
 135                 }
 136         } else {
 137                 status = auth_nt_status_squash(status);
 138                 result = LDAP_INVALID_CREDENTIALS;
 139                 errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
 140         }
 141
 142         resp->response.resultcode = result;
 143         resp->response.dn = NULL;
 144         resp->response.errormessage = errstr;
 145         resp->response.referral = NULL;
 146
 147         ldapsrv_queue_reply(call, reply);
 148         return NT_STATUS_OK;
 149 }
 150
 151 NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
 152 {
 153         struct ldap_BindRequest *req = &call->request->r.BindRequest;
 154         struct ldapsrv_reply *reply;
 155         struct ldap_BindResponse *resp;
 156
 157         switch (req->mechanism) {
 158                 case LDAP_AUTH_MECH_SIMPLE:
 159                         return ldapsrv_BindSimple(call);
 160                 case LDAP_AUTH_MECH_SASL:
 161                         return ldapsrv_BindSASL(call);
 162         }
 163
 164         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 165         if (!reply) {
 166                 return NT_STATUS_NO_MEMORY;
 167         }
 168
 169         resp = &reply->msg->r.BindResponse;
 170         resp->response.resultcode = 7;
 171         resp->response.dn = NULL;
 172         resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
 173         resp->response.referral = NULL;
 174         resp->SASL.secblob = data_blob(NULL, 0);
 175
 176         ldapsrv_queue_reply(call, reply);
 177         return NT_STATUS_OK;
 178 }
 179
 180 NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
 181 {
 182         DEBUG(10, ("UnbindRequest\n"));
 183         return NT_STATUS_OK;
 184 }