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-rw-r--r--source/utils/net_ads_cldap.c364
1 files changed, 364 insertions, 0 deletions
diff --git a/source/utils/net_ads_cldap.c b/source/utils/net_ads_cldap.c
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index 00000000000..1903172cf75
--- /dev/null
+++ b/source/utils/net_ads_cldap.c
@@ -0,0 +1,364 @@
+/*
+ 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;
+
+ 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("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
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