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/*
Samba Unix/Linux SMB client library
net ads cldap functions
Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
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 "../utils/net.h"
#ifdef HAVE_ADS
struct cldap_netlogon_reply {
uint32 version;
uint32 flags;
GUID guid;
char *domain;
char *server_name;
char *domain_flatname;
char *server_flatname;
char *dns_name;
uint32 unknown2[2];
};
/*
pull a length prefixed string from a packet
return number of bytes consumed
*/
static unsigned pull_len_string(char **ret, const char *p)
{
unsigned len = *p;
(*ret) = NULL;
if (len == 0) return 1;
(*ret) = smb_xstrndup(p+1, len);
return len+1;
}
/*
pull a dotted string from a packet
return number of bytes consumed
*/
static unsigned pull_dotted_string(char **ret, const char *p)
{
char *s;
unsigned len, total_len=0;
(*ret) = NULL;
while ((len = pull_len_string(&s, p)) > 1) {
if (total_len) {
char *s2;
asprintf(&s2, "%s.%s", *ret, s);
SAFE_FREE(*ret);
(*ret) = s2;
} else {
(*ret) = s;
}
total_len += len;
p += len;
}
return total_len + 1;
}
/*
do a cldap netlogon query
*/
static int send_cldap_netlogon(int sock, const char *domain,
const char *hostname, unsigned ntversion)
{
ASN1_DATA data;
char ntver[4];
SIVAL(ntver, 0, ntversion);
memset(&data, 0, sizeof(data));
asn1_push_tag(&data,ASN1_SEQUENCE(0));
asn1_write_Integer(&data, 4);
asn1_push_tag(&data, ASN1_APPLICATION(3));
asn1_write_OctetString(&data, NULL, 0);
asn1_write_enumerated(&data, 0);
asn1_write_enumerated(&data, 0);
asn1_write_Integer(&data, 0);
asn1_write_Integer(&data, 0);
asn1_write_BOOLEAN2(&data, False);
asn1_push_tag(&data, ASN1_CONTEXT(0));
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "DnsDomain", 9);
asn1_write_OctetString(&data, domain, strlen(domain));
asn1_pop_tag(&data);
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "Host", 4);
asn1_write_OctetString(&data, hostname, strlen(hostname));
asn1_pop_tag(&data);
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "NtVer", 5);
asn1_write_OctetString(&data, ntver, 4);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_push_tag(&data,ASN1_SEQUENCE(0));
asn1_write_OctetString(&data, "NetLogon", 8);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
asn1_pop_tag(&data);
if (data.has_error) {
d_printf("Failed to build cldap netlogon at offset %d\n", (int)data.ofs);
asn1_free(&data);
return -1;
}
if (write(sock, data.data, data.length) != data.length) {
d_printf("failed to send cldap query (%s)\n", strerror(errno));
}
file_save("cldap_query.dat", data.data, data.length);
asn1_free(&data);
return 0;
}
/*
receive a cldap netlogon reply
*/
static int recv_cldap_netlogon(int sock, struct cldap_netlogon_reply *reply)
{
int ret;
ASN1_DATA data;
DATA_BLOB blob;
DATA_BLOB os1, os2, os3;
uint32 i1;
char *p;
blob = data_blob(NULL, 8192);
ret = read(sock, blob.data, blob.length);
if (ret <= 0) {
d_printf("no reply received to cldap netlogon\n");
return -1;
}
blob.length = ret;
file_save("cldap_reply.dat", blob.data, blob.length);
asn1_load(&data, blob);
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_read_Integer(&data, &i1);
asn1_start_tag(&data, ASN1_APPLICATION(4));
asn1_read_OctetString(&data, &os1);
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_start_tag(&data, ASN1_SEQUENCE(0));
asn1_read_OctetString(&data, &os2);
asn1_start_tag(&data, ASN1_SET);
asn1_read_OctetString(&data, &os3);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
asn1_end_tag(&data);
if (data.has_error) {
d_printf("Failed to parse cldap reply\n");
return -1;
}
file_save("cldap_reply_core.dat", os3.data, os3.length);
p = os3.data;
reply->version = IVAL(p, 0); p += 4;
reply->flags = IVAL(p, 0); p += 4;
memcpy(&reply->guid.info, p, GUID_SIZE);
p += GUID_SIZE;
p += pull_dotted_string(&reply->domain, p);
p += 2; /* 0xc018 - whats this? */
p += pull_len_string(&reply->server_name, p);
p += 2; /* 0xc018 - whats this? */
p += pull_len_string(&reply->domain_flatname, p);
p += 1;
p += pull_len_string(&reply->server_flatname, p);
p += 2;
p += pull_len_string(&reply->dns_name, p);
data_blob_free(&os1);
data_blob_free(&os2);
data_blob_free(&os3);
data_blob_free(&blob);
return 0;
}
/*
free a cldap reply packet
*/
static void cldap_reply_free(struct cldap_netlogon_reply *reply)
{
SAFE_FREE(reply->domain);
SAFE_FREE(reply->server_name);
SAFE_FREE(reply->domain_flatname);
SAFE_FREE(reply->server_flatname);
SAFE_FREE(reply->dns_name);
}
/*
do a cldap netlogon query
*/
int ads_cldap_netlogon(ADS_STRUCT *ads)
{
int sock;
int ret;
struct cldap_netlogon_reply reply;
sock = open_udp_socket(inet_ntoa(ads->ldap_ip), ads->ldap_port);
if (sock == -1) {
d_printf("Failed to open udp socket to %s:%u\n",
inet_ntoa(ads->ldap_ip),
ads->ldap_port);
return -1;
}
ret = send_cldap_netlogon(sock, ads->config.realm, global_myname(), 6);
if (ret != 0) {
return ret;
}
ret = recv_cldap_netlogon(sock, &reply);
close(sock);
if (ret == -1) {
return -1;
}
d_printf("Version: 0x%x\n", reply.version);
d_printf("GUID: ");
print_guid(&reply.guid);
d_printf("Flags: 0x%x\n", reply.flags);
d_printf("Domain: %s\n", reply.domain);
d_printf("Server Name: %s\n", reply.server_name);
d_printf("Flatname: %s\n", reply.domain_flatname);
d_printf("Server Name2: %s\n", reply.server_flatname);
d_printf("DNS Name: %s\n", reply.dns_name);
cldap_reply_free(&reply);
return ret;
}
#endif
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