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samba-mirror/source3/utils/net_ads_cldap.c
Tim Potter b4cf9e9505 r2835: Since we always have -I. and -I$(srcdir) in CFLAGS, we can get rid of
'..' from all #include preprocessor commands.   This fixes bugzilla #1880
where OpenVMS gets confused about the '.' characters.
(This used to be commit 7f161702fa)
2007-10-10 10:52:55 -05:00

366 lines
9.6 KiB
C

/*
Samba Unix/Linux SMB client library
net ads cldap functions
Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
Copyright (C) 2003 Jim McDonough (jmcd@us.ibm.com)
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
#define MAX_DNS_LABEL 255 + 1
struct cldap_netlogon_reply {
uint32 type;
uint32 flags;
UUID_FLAT guid;
char forest[MAX_DNS_LABEL];
char domain[MAX_DNS_LABEL];
char hostname[MAX_DNS_LABEL];
char netbios_domain[MAX_DNS_LABEL];
char netbios_hostname[MAX_DNS_LABEL];
char unk[MAX_DNS_LABEL];
char user_name[MAX_DNS_LABEL];
char site_name[MAX_DNS_LABEL];
char site_name_2[MAX_DNS_LABEL];
uint32 version;
uint16 lmnt_token;
uint16 lm20_token;
};
/*
These seem to be strings as described in RFC1035 4.1.4 and can be:
- a sequence of labels ending in a zero octet
- a pointer
- a sequence of labels ending with a pointer
A label is a byte where the first two bits must be zero and the remaining
bits represent the length of the label followed by the label itself.
Therefore, the length of a label is at max 64 bytes. Under RFC1035, a
sequence of labels cannot exceed 255 bytes.
A pointer consists of a 14 bit offset from the beginning of the data.
struct ptr {
unsigned ident:2; // must be 11
unsigned offset:14; // from the beginning of data
};
This is used as a method to compress the packet by eliminated duplicate
domain components. Since a UDP packet should probably be < 512 bytes and a
DNS name can be up to 255 bytes, this actually makes a lot of sense.
*/
static unsigned pull_netlogon_string(char *ret, const char *ptr,
const char *data)
{
char *pret = ret;
int followed_ptr = 0;
unsigned ret_len = 0;
memset(pret, 0, MAX_DNS_LABEL);
do {
if ((*ptr & 0xc0) == 0xc0) {
uint16 len;
if (!followed_ptr) {
ret_len += 2;
followed_ptr = 1;
}
len = ((ptr[0] & 0x3f) << 8) | ptr[1];
ptr = data + len;
} else if (*ptr) {
uint8 len = (uint8)*(ptr++);
if ((pret - ret + len + 1) >= MAX_DNS_LABEL) {
d_printf("DC returning too long DNS name\n");
return 0;
}
if (pret != ret) {
*pret = '.';
pret++;
}
memcpy(pret, ptr, len);
pret += len;
ptr += len;
if (!followed_ptr) {
ret_len += (len + 1);
}
}
} while (*ptr);
return followed_ptr ? ret_len : ret_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];
#ifdef CLDAP_USER_QUERY
char aac[4];
SIVAL(aac, 0, 0x00000180);
#endif
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);
#ifdef CLDAP_USER_QUERY
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "User", 4);
asn1_write_OctetString(&data, "SAMBA$", 6);
asn1_pop_tag(&data);
asn1_push_tag(&data, ASN1_CONTEXT(3));
asn1_write_OctetString(&data, "AAC", 4);
asn1_write_OctetString(&data, aac, 4);
asn1_pop_tag(&data);
#endif
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) != (ssize_t)data.length) {
d_printf("failed to send cldap query (%s)\n", strerror(errno));
}
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;
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;
}
p = (char *)os3.data;
reply->type = IVAL(p, 0); p += 4;
reply->flags = IVAL(p, 0); p += 4;
memcpy(&reply->guid.info, p, UUID_FLAT_SIZE);
p += UUID_FLAT_SIZE;
p += pull_netlogon_string(reply->forest, p, (const char *)os3.data);
p += pull_netlogon_string(reply->domain, p, (const char *)os3.data);
p += pull_netlogon_string(reply->hostname, p, (const char *)os3.data);
p += pull_netlogon_string(reply->netbios_domain, p, (const char *)os3.data);
p += pull_netlogon_string(reply->netbios_hostname, p, (const char *)os3.data);
p += pull_netlogon_string(reply->unk, p, (const char *)os3.data);
if (reply->type == SAMLOGON_AD_R) {
p += pull_netlogon_string(reply->user_name, p, (const char *)os3.data);
} else {
*reply->user_name = 0;
}
p += pull_netlogon_string(reply->site_name, p, (const char *)os3.data);
p += pull_netlogon_string(reply->site_name_2, p, (const char *)os3.data);
reply->version = IVAL(p, 0);
reply->lmnt_token = SVAL(p, 4);
reply->lm20_token = SVAL(p, 6);
data_blob_free(&os1);
data_blob_free(&os2);
data_blob_free(&os3);
data_blob_free(&blob);
return 0;
}
/*
do a cldap netlogon query
*/
int ads_cldap_netlogon(ADS_STRUCT *ads)
{
int sock;
int ret;
struct cldap_netlogon_reply reply;
const char *target = opt_host ? opt_host : inet_ntoa(ads->ldap_ip);
sock = open_udp_socket(target, 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("Information for Domain Controller: %s\n\n",
ads->config.ldap_server_name);
d_printf("Response Type: ");
switch (reply.type) {
case SAMLOGON_AD_UNK_R:
d_printf("SAMLOGON\n");
break;
case SAMLOGON_AD_R:
d_printf("SAMLOGON_USER\n");
break;
default:
d_printf("0x%x\n", reply.type);
break;
}
d_printf("GUID: %s\n",
smb_uuid_string_static(smb_uuid_unpack_static(reply.guid)));
d_printf("Flags:\n"
"\tIs a PDC: %s\n"
"\tIs a GC of the forest: %s\n"
"\tIs an LDAP server: %s\n"
"\tSupports DS: %s\n"
"\tIs running a KDC: %s\n"
"\tIs running time services: %s\n"
"\tIs the closest DC: %s\n"
"\tIs writable: %s\n"
"\tHas a hardware clock: %s\n"
"\tIs a non-domain NC serviced by LDAP server: %s\n",
(reply.flags & ADS_PDC) ? "yes" : "no",
(reply.flags & ADS_GC) ? "yes" : "no",
(reply.flags & ADS_LDAP) ? "yes" : "no",
(reply.flags & ADS_DS) ? "yes" : "no",
(reply.flags & ADS_KDC) ? "yes" : "no",
(reply.flags & ADS_TIMESERV) ? "yes" : "no",
(reply.flags & ADS_CLOSEST) ? "yes" : "no",
(reply.flags & ADS_WRITABLE) ? "yes" : "no",
(reply.flags & ADS_GOOD_TIMESERV) ? "yes" : "no",
(reply.flags & ADS_NDNC) ? "yes" : "no");
printf("Forest:\t\t\t%s\n", reply.forest);
printf("Domain:\t\t\t%s\n", reply.domain);
printf("Domain Controller:\t%s\n", reply.hostname);
printf("Pre-Win2k Domain:\t%s\n", reply.netbios_domain);
printf("Pre-Win2k Hostname:\t%s\n", reply.netbios_hostname);
if (*reply.unk) printf("Unk:\t\t\t%s\n", reply.unk);
if (*reply.user_name) printf("User name:\t%s\n", reply.user_name);
printf("Site Name:\t\t%s\n", reply.site_name);
printf("Site Name (2):\t\t%s\n", reply.site_name_2);
d_printf("NT Version: %d\n", reply.version);
d_printf("LMNT Token: %.2x\n", reply.lmnt_token);
d_printf("LM20 Token: %.2x\n", reply.lm20_token);
return ret;
}
#endif