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
  26 static NTSTATUS ldapsrv_BindSimple(struct ldapsrv_call *call)
  27 {
  28         struct ldap_BindRequest *req = &call->request.r.BindRequest;
  29         struct ldapsrv_reply *reply;
  30         struct ldap_BindResponse *resp;
  31
  32         DEBUG(10, ("BindSimple dn: %s\n",req->dn));
  33
  34         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  35         if (!reply) {
  36                 return NT_STATUS_NO_MEMORY;
  37         }
  38
  39         resp = &reply->msg.r.BindResponse;
  40         resp->response.resultcode = 0;
  41         resp->response.dn = NULL;
  42         resp->response.errormessage = NULL;
  43         resp->response.referral = NULL;
  44         resp->SASL.secblob = data_blob(NULL, 0);
  45
  46         return ldapsrv_queue_reply(call, reply);
  47 }
  48
  49 static NTSTATUS ldapsrv_BindSASL(struct ldapsrv_call *call)
  50 {
  51         struct ldap_BindRequest *req = &call->request.r.BindRequest;
  52         struct ldapsrv_reply *reply;
  53         struct ldap_BindResponse *resp;
  54         struct ldapsrv_connection *conn;
  55         int result;
  56         const char *errstr;
  57         NTSTATUS status = NT_STATUS_OK;
  58         NTSTATUS sasl_status;
  59         BOOL ret;
  60
  61         DEBUG(10, ("BindSASL dn: %s\n",req->dn));
  62
  63         if (!call->conn->gensec) {
  64                 call->conn->session_info = NULL;
  65
  66                 status = gensec_server_start(call->conn, &call->conn->gensec);
  67                 if (!NT_STATUS_IS_OK(status)) {
  68                         DEBUG(1, ("Failed to start GENSEC server code: %s\n", nt_errstr(status)));
  69                         return status;
  70                 }
  71
  72                 gensec_set_target_service(call->conn->gensec, "ldap");
  73
  74                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SIGN);
  75                 gensec_want_feature(call->conn->gensec, GENSEC_FEATURE_SEAL);
  76
  77                 if (req->creds.SASL.secblob.length >= 7 &&
  78                     strncmp(req->creds.SASL.secblob.data, "NTLMSSP", 7) == 0) {
  79                         status = gensec_start_mech_by_sasl_name(call->conn->gensec, "NTLM");
  80                 } else {
  81                         status = gensec_start_mech_by_sasl_name(call->conn->gensec, req->creds.SASL.mechanism);
  82                 }
  83                 if (!NT_STATUS_IS_OK(status)) {
  84                         DEBUG(1, ("Failed to start GENSEC SASL[%s] server code: %s\n",
  85                                 req->creds.SASL.mechanism, nt_errstr(status)));
  86                         goto reply;
  87                 }
  88         }
  89
  90 reply:
  91         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
  92         if (!reply) {
  93                 return NT_STATUS_NO_MEMORY;
  94         }
  95         resp = &reply->msg.r.BindResponse;
  96
  97         conn = call->conn;
  98
  99         if (NT_STATUS_IS_OK(status)) {
 100                 status = gensec_update(call->conn->gensec, reply,
 101                                        req->creds.SASL.secblob, &resp->SASL.secblob);
 102         }
 103
 104         if (NT_STATUS_EQUAL(NT_STATUS_MORE_PROCESSING_REQUIRED, status)) {
 105                 result = LDAP_SASL_BIND_IN_PROGRESS;
 106                 errstr = NULL;
 107         } else if (NT_STATUS_IS_OK(status)) {
 108                 result = LDAP_SUCCESS;
 109                 errstr = NULL;
 110         } else {
 111                 result = 49;
 112                 errstr = talloc_asprintf(reply, "SASL:[%s]: %s", req->creds.SASL.mechanism, nt_errstr(status));
 113         }
 114
 115         resp->response.resultcode = result;
 116         resp->response.dn = NULL;
 117         resp->response.errormessage = errstr;
 118         resp->response.referral = NULL;
 119
 120         sasl_status = status;
 121         status = ldapsrv_queue_reply(call, reply);
 122         if (!NT_STATUS_IS_OK(sasl_status) || !NT_STATUS_IS_OK(status)) {
 123                 return status;
 124         }
 125
 126         status = ldapsrv_do_responses(call->conn);
 127         if (!NT_STATUS_IS_OK(status)) {
 128                 return status;
 129         }
 130
 131         ret = ldapsrv_append_to_buf(&conn->sasl_out_buffer, conn->out_buffer.data, conn->out_buffer.length);
 132         if (!ret) {
 133                 return NT_STATUS_NO_MEMORY;
 134         }
 135         ldapsrv_consumed_from_buf(&conn->out_buffer, conn->out_buffer.length);
 136         if (NT_STATUS_IS_OK(status)) {
 137                 status = gensec_session_info(conn->gensec, &conn->session_info);
 138         }
 139
 140         return status;
 141 }
 142
 143 NTSTATUS ldapsrv_BindRequest(struct ldapsrv_call *call)
 144 {
 145         struct ldap_BindRequest *req = &call->request.r.BindRequest;
 146         struct ldapsrv_reply *reply;
 147         struct ldap_BindResponse *resp;
 148
 149         switch (req->mechanism) {
 150                 case LDAP_AUTH_MECH_SIMPLE:
 151                         return ldapsrv_BindSimple(call);
 152                 case LDAP_AUTH_MECH_SASL:
 153                         return ldapsrv_BindSASL(call);
 154         }
 155
 156         reply = ldapsrv_init_reply(call, LDAP_TAG_BindResponse);
 157         if (!reply) {
 158                 return NT_STATUS_NO_MEMORY;
 159         }
 160
 161         resp = &reply->msg.r.BindResponse;
 162         resp->response.resultcode = 7;
 163         resp->response.dn = NULL;
 164         resp->response.errormessage = talloc_asprintf(reply, "Bad AuthenticationChoice [%d]", req->mechanism);
 165         resp->response.referral = NULL;
 166         resp->SASL.secblob = data_blob(NULL, 0);
 167
 168         return ldapsrv_queue_reply(call, reply);
 169 }
 170
 171 NTSTATUS ldapsrv_UnbindRequest(struct ldapsrv_call *call)
 172 {
 173         DEBUG(10, ("UnbindRequest\n"));
 174         return NT_STATUS_OK;
 175 }