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         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  36         if (!reply) {
  37                 return NT_STATUS_NO_MEMORY;
  38         }
  39
  40         resp = &reply->msg->r.BindResponse;
  41         resp->response.resultcode = 0;
  42         resp->response.dn = NULL;
  43         resp->response.errormessage = NULL;
  44         resp->response.referral = NULL;
  45         resp->SASL.secblob = data_blob(NULL, 0);
  46
  47         return ldapsrv_queue_reply(call, reply);
  48 }
  49
  50 static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
  51 {
  52         struct ldap_BindRequest *req = &call->request->r.BindRequest;
  53         struct ldapsrv_reply *reply;
  54         struct ldap_BindResponse *resp;
  55         struct ldapsrv_connection *conn;
  56         int result;
  57         const char *errstr;
  58         NTSTATUS status = NT_STATUS_OK;
  59         NTSTATUS sasl_status;
  60         BOOL ret;
  61
  62         DEBUG(10, ("BindSASL dn: %s\n",req->dn));
  63
  64         if (!call->conn->gensec) {
  65                 call->conn->session_info = NULL;
  66
  67                 status = gensec_server_start(call->conn, &call->conn->gensec,
  68                                              call->conn->connection->event.ctx);
  69                 if (!NT_STATUS_IS_OK(status)) {
  70                         DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
  71                         return status;
  72                 }
  73
  74                 gensec_set_target_service(call->conn->gensec, "ldap");
  75
  76                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SIGN);
  77                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SEAL);
  78
  79
  80                 status = gensec_start_mech_by_sasl_name(call->conn->gensec, req->creds.SASL.mechanism);
  81                 if (!NT_STATUS_IS_OK(status)) {
  82                         DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
  83                                 req->creds.SASL.mechanism, nt_errstr(status)));
  84                         goto reply;
  85                 }
  86         }
  87
  88 reply:
  89         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  90         if (!reply) {
  91                 return NT_STATUS_NO_MEMORY;
  92         }
  93         resp = &reply->msg->r.BindResponse;
  94
  95         conn = call->conn;
  96
  97         if (NT_STATUS_IS_OK(status)) {
  98                 status = gensec_update(call->conn->gensec, reply,
  99                                        req->creds.SASL.secblob, &resp->SASL.secblob);
 100         }
 101
 102         if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
 103                 result = LDAP_SASL_BIND_IN_PROGRESS;
 104                 errstr = NULL;
 105         } else if (NT_STATUS_IS_OK(status)) {
 106                 result = LDAP_SUCCESS;
 107                 errstr = NULL;
 108         } else {
 109                 result = 49;
 110                 errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
 111         }
 112
 113         resp->response.resultcode = result;
 114         resp->response.dn = NULL;
 115         resp->response.errormessage = errstr;
 116         resp->response.referral = NULL;
 117
 118         sasl_status = status;
 119         status = ldapsrv_queue_reply(call, reply);
 120         if (!NT_STATUS_IS_OK(sasl_status) || !NT_STATUS_IS_OK(status)) {
 121                 return status;
 122         }
 123
 124         status = ldapsrv_do_responses(call->conn);
 125         if (!NT_STATUS_IS_OK(status)) {
 126                 return status;
 127         }
 128
 129         ret = ldapsrv_append_to_buf(&conn->sasl_out_buffer, conn->out_buffer.data, conn->out_buffer.length);
 130         if (!ret) {
 131                 return NT_STATUS_NO_MEMORY;
 132         }
 133         ldapsrv_consumed_from_buf(&conn->out_buffer, conn->out_buffer.length);
 134         if (NT_STATUS_IS_OK(status)) {
 135                 status = gensec_session_info(conn->gensec, &conn->session_info);
 136         }
 137
 138         return status;
 139 }
 140
 141 NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
 142 {
 143         struct ldap_BindRequest *req = &call->request->r.BindRequest;
 144         struct ldapsrv_reply *reply;
 145         struct ldap_BindResponse *resp;
 146
 147         switch (req->mechanism) {
 148                 case LDAP_AUTH_MECH_SIMPLE:
 149                         return ldapsrv_BindSimple(call);
 150                 case LDAP_AUTH_MECH_SASL:
 151                         return ldapsrv_BindSASL(call);
 152         }
 153
 154         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 155         if (!reply) {
 156                 return NT_STATUS_NO_MEMORY;
 157         }
 158
 159         resp = &reply->msg->r.BindResponse;
 160         resp->response.resultcode = 7;
 161         resp->response.dn = NULL;
 162         resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
 163         resp->response.referral = NULL;
 164         resp->SASL.secblob = data_blob(NULL, 0);
 165
 166         return ldapsrv_queue_reply(call, reply);
 167 }
 168
 169 NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
 170 {
 171         DEBUG(10, ("UnbindRequest\n"));
 172         return NT_STATUS_OK;
 173 }