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/*
Unix SMB/CIFS mplementation.
LDAP bind calls
Copyright (C) Andrew Tridgell 2005
Copyright (C) Volker Lendecke 2004
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "libcli/ldap/ldap.h"
#include "libcli/ldap/ldap_client.h"
#include "auth/auth.h"
static struct ldap_message *new_ldap_simple_bind_msg(struct ldap_connection *conn,
const char *dn, const char *pw)
{
struct ldap_message *res;
res = new_ldap_message(conn);
if (!res) {
return NULL;
}
res->type = LDAP_TAG_BindRequest;
res->r.BindRequest.version = 3;
res->r.BindRequest.dn = talloc_strdup(res, dn);
res->r.BindRequest.mechanism = LDAP_AUTH_MECH_SIMPLE;
res->r.BindRequest.creds.password = talloc_strdup(res, pw);
return res;
}
/*
perform a simple username/password bind
*/
NTSTATUS ldap_bind_simple(struct ldap_connection *conn,
const char *userdn, const char *password)
{
struct ldap_request *req;
struct ldap_message *msg;
const char *dn, *pw;
NTSTATUS status;
if (conn == NULL) {
return NT_STATUS_INVALID_CONNECTION;
}
if (userdn) {
dn = userdn;
} else {
if (conn->auth_dn) {
dn = conn->auth_dn;
} else {
dn = "";
}
}
if (password) {
pw = password;
} else {
if (conn->simple_pw) {
pw = conn->simple_pw;
} else {
pw = "";
}
}
msg = new_ldap_simple_bind_msg(conn, dn, pw);
NT_STATUS_HAVE_NO_MEMORY(msg);
/* send the request */
req = ldap_request_send(conn, msg);
talloc_free(msg);
NT_STATUS_HAVE_NO_MEMORY(req);
/* wait for replies */
status = ldap_request_wait(req);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return status;
}
/* check its a valid reply */
msg = req->replies[0];
if (msg->type != LDAP_TAG_BindResponse) {
talloc_free(req);
return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
}
status = ldap_check_response(conn, &msg->r.BindResponse.response);
talloc_free(req);
return status;
}
static struct ldap_message *new_ldap_sasl_bind_msg(struct ldap_connection *conn,
const char *sasl_mechanism,
DATA_BLOB *secblob)
{
struct ldap_message *res;
res = new_ldap_message(conn);
if (!res) {
return NULL;
}
res->type = LDAP_TAG_BindRequest;
res->r.BindRequest.version = 3;
res->r.BindRequest.dn = "";
res->r.BindRequest.mechanism = LDAP_AUTH_MECH_SASL;
res->r.BindRequest.creds.SASL.mechanism = talloc_strdup(res, sasl_mechanism);
res->r.BindRequest.creds.SASL.secblob = *secblob;
return res;
}
/*
perform a sasl bind using the given credentials
*/
NTSTATUS ldap_bind_sasl(struct ldap_connection *conn, struct cli_credentials *creds)
{
NTSTATUS status;
TALLOC_CTX *tmp_ctx = NULL;
DATA_BLOB input = data_blob(NULL, 0);
DATA_BLOB output = data_blob(NULL, 0);
status = gensec_client_start(conn, &conn->gensec, NULL);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to start GENSEC engine (%s)\n", nt_errstr(status)));
goto failed;
}
gensec_want_feature(conn->gensec, 0 | GENSEC_FEATURE_SIGN | GENSEC_FEATURE_SEAL);
status = gensec_set_credentials(conn->gensec, creds);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to set GENSEC creds: %s\n",
nt_errstr(status)));
goto failed;
}
status = gensec_set_target_hostname(conn->gensec, conn->host);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to set GENSEC target hostname: %s\n",
nt_errstr(status)));
goto failed;
}
status = gensec_set_target_service(conn->gensec, "ldap");
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to set GENSEC target service: %s\n",
nt_errstr(status)));
goto failed;
}
status = gensec_start_mech_by_sasl_name(conn->gensec, "NTLM");
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to set GENSEC client SPNEGO mechanism: %s\n",
nt_errstr(status)));
goto failed;
}
tmp_ctx = talloc_new(conn);
if (tmp_ctx == NULL) goto failed;
status = gensec_update(conn->gensec, tmp_ctx, input, &output);
while (1) {
struct ldap_message *response;
struct ldap_message *msg;
struct ldap_request *req;
int result = LDAP_OTHER;
if (NT_STATUS_IS_OK(status) && output.length == 0) {
break;
}
if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) &&
!NT_STATUS_IS_OK(status)) {
break;
}
msg = new_ldap_sasl_bind_msg(tmp_ctx, "GSS-SPNEGO", &output);
if (msg == NULL) {
status = NT_STATUS_NO_MEMORY;
goto failed;
}
req = ldap_request_send(conn, msg);
if (req == NULL) {
status = NT_STATUS_NO_MEMORY;
goto failed;
}
talloc_steal(tmp_ctx, req);
status = ldap_result_n(req, 0, &response);
if (!NT_STATUS_IS_OK(status)) {
goto failed;
}
if (response->type != LDAP_TAG_BindResponse) {
status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
goto failed;
}
result = response->r.BindResponse.response.resultcode;
if (result != LDAP_SUCCESS && result != LDAP_SASL_BIND_IN_PROGRESS) {
break;
}
status = gensec_update(conn->gensec, tmp_ctx,
response->r.BindResponse.SASL.secblob,
&output);
}
if (NT_STATUS_IS_OK(status) &&
(gensec_have_feature(conn->gensec, GENSEC_FEATURE_SEAL) ||
gensec_have_feature(conn->gensec, GENSEC_FEATURE_SIGN))) {
conn->enable_wrap = True;
}
talloc_free(tmp_ctx);
return status;
failed:
talloc_free(tmp_ctx);
talloc_free(conn->gensec);
conn->gensec = NULL;
return status;
}
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