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Diffstat (limited to 'source3/libads/cldap.c')
-rw-r--r--source3/libads/cldap.c368
1 files changed, 368 insertions, 0 deletions
diff --git a/source3/libads/cldap.c b/source3/libads/cldap.c
new file mode 100644
index 0000000000..11565065af
--- /dev/null
+++ b/source3/libads/cldap.c
@@ -0,0 +1,368 @@
+/*
+ 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)
+ Copyright (C) 2008 Guenther Deschner (gd@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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+
+/*
+ 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));
+
+ if (domain) {
+ 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) {
+ DEBUG(2,("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) {
+ DEBUG(2,("failed to send cldap query (%s)\n", strerror(errno)));
+ asn1_free(&data);
+ return -1;
+ }
+
+ asn1_free(&data);
+
+ return 0;
+}
+
+static SIG_ATOMIC_T gotalarm;
+
+/***************************************************************
+ Signal function to tell us we timed out.
+****************************************************************/
+
+static void gotalarm_sig(void)
+{
+ gotalarm = 1;
+}
+
+/*
+ receive a cldap netlogon reply
+*/
+static int recv_cldap_netlogon(TALLOC_CTX *mem_ctx,
+ int sock,
+ uint32_t *nt_version,
+ union nbt_cldap_netlogon **reply)
+{
+ int ret;
+ ASN1_DATA data;
+ DATA_BLOB blob = data_blob_null;
+ DATA_BLOB os1 = data_blob_null;
+ DATA_BLOB os2 = data_blob_null;
+ DATA_BLOB os3 = data_blob_null;
+ int i1;
+ /* half the time of a regular ldap timeout, not less than 3 seconds. */
+ unsigned int al_secs = MAX(3,lp_ldap_timeout()/2);
+ union nbt_cldap_netlogon *r = NULL;
+
+ blob = data_blob(NULL, 8192);
+ if (blob.data == NULL) {
+ DEBUG(1, ("data_blob failed\n"));
+ errno = ENOMEM;
+ return -1;
+ }
+
+ /* Setup timeout */
+ gotalarm = 0;
+ CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
+ alarm(al_secs);
+ /* End setup timeout. */
+
+ ret = read(sock, blob.data, blob.length);
+
+ /* Teardown timeout. */
+ CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
+ alarm(0);
+
+ if (ret <= 0) {
+ DEBUG(1,("no reply received to cldap netlogon\n"));
+ data_blob_free(&blob);
+ 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) {
+ data_blob_free(&blob);
+ data_blob_free(&os1);
+ data_blob_free(&os2);
+ data_blob_free(&os3);
+ asn1_free(&data);
+ DEBUG(1,("Failed to parse cldap reply\n"));
+ return -1;
+ }
+
+ r = TALLOC_ZERO_P(mem_ctx, union nbt_cldap_netlogon);
+ if (!r) {
+ errno = ENOMEM;
+ data_blob_free(&os1);
+ data_blob_free(&os2);
+ data_blob_free(&os3);
+ data_blob_free(&blob);
+ return -1;
+ }
+
+ if (!pull_mailslot_cldap_reply(mem_ctx, &os3, r, nt_version)) {
+ data_blob_free(&os1);
+ data_blob_free(&os2);
+ data_blob_free(&os3);
+ data_blob_free(&blob);
+ TALLOC_FREE(r);
+ return -1;
+ }
+
+ data_blob_free(&os1);
+ data_blob_free(&os2);
+ data_blob_free(&os3);
+ data_blob_free(&blob);
+
+ asn1_free(&data);
+
+ if (reply) {
+ *reply = r;
+ } else {
+ TALLOC_FREE(r);
+ }
+
+ return 0;
+}
+
+/*******************************************************************
+ do a cldap netlogon query. Always 389/udp
+*******************************************************************/
+
+bool ads_cldap_netlogon(TALLOC_CTX *mem_ctx,
+ const char *server,
+ const char *realm,
+ uint32_t *nt_version,
+ union nbt_cldap_netlogon **reply)
+{
+ int sock;
+ int ret;
+
+ sock = open_udp_socket(server, LDAP_PORT );
+ if (sock == -1) {
+ DEBUG(2,("ads_cldap_netlogon: Failed to open udp socket to %s\n",
+ server));
+ return False;
+ }
+
+ ret = send_cldap_netlogon(sock, realm, global_myname(), *nt_version);
+ if (ret != 0) {
+ close(sock);
+ return False;
+ }
+ ret = recv_cldap_netlogon(mem_ctx, sock, nt_version, reply);
+ close(sock);
+
+ if (ret == -1) {
+ return False;
+ }
+
+ return True;
+}
+
+/*******************************************************************
+ do a cldap netlogon query. Always 389/udp
+*******************************************************************/
+
+bool ads_cldap_netlogon_5(TALLOC_CTX *mem_ctx,
+ const char *server,
+ const char *realm,
+ struct nbt_cldap_netlogon_5 *reply5)
+{
+ uint32_t nt_version = NETLOGON_VERSION_5 | NETLOGON_VERSION_5EX;
+ union nbt_cldap_netlogon *reply = NULL;
+ bool ret;
+
+ ret = ads_cldap_netlogon(mem_ctx, server, realm, &nt_version, &reply);
+ if (!ret) {
+ return false;
+ }
+
+ if (nt_version != (NETLOGON_VERSION_5 | NETLOGON_VERSION_5EX)) {
+ return false;
+ }
+
+ *reply5 = reply->logon5;
+
+ return true;
+}
+
+/****************************************************************
+****************************************************************/
+
+bool pull_mailslot_cldap_reply(TALLOC_CTX *mem_ctx,
+ const DATA_BLOB *blob,
+ union nbt_cldap_netlogon *r,
+ uint32_t *nt_version)
+{
+ enum ndr_err_code ndr_err;
+ uint32_t nt_version_query = ((*nt_version) & 0x0000001f);
+ uint16_t command = 0;
+
+ ndr_err = ndr_pull_struct_blob(blob, mem_ctx, &command,
+ (ndr_pull_flags_fn_t)ndr_pull_uint16);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ return false;
+ }
+
+ switch (command) {
+ case 0x13: /* 19 */
+ case 0x15: /* 21 */
+ case 0x17: /* 23 */
+ case 0x19: /* 25 */
+ break;
+ default:
+ DEBUG(1,("got unexpected command: %d (0x%08x)\n",
+ command, command));
+ return false;
+ }
+
+ ndr_err = ndr_pull_union_blob_all(blob, mem_ctx, r, nt_version_query,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_cldap_netlogon);
+ if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ goto done;
+ }
+
+ /* when the caller requested just those nt_version bits that the server
+ * was able to reply to, we are fine and all done. otherwise we need to
+ * assume downgraded replies which are painfully parsed here - gd */
+
+ if (nt_version_query & NETLOGON_VERSION_WITH_CLOSEST_SITE) {
+ nt_version_query &= ~NETLOGON_VERSION_WITH_CLOSEST_SITE;
+ }
+ ndr_err = ndr_pull_union_blob_all(blob, mem_ctx, r, nt_version_query,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_cldap_netlogon);
+ if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ goto done;
+ }
+ if (nt_version_query & NETLOGON_VERSION_5EX_WITH_IP) {
+ nt_version_query &= ~NETLOGON_VERSION_5EX_WITH_IP;
+ }
+ ndr_err = ndr_pull_union_blob_all(blob, mem_ctx, r, nt_version_query,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_cldap_netlogon);
+ if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ goto done;
+ }
+ if (nt_version_query & NETLOGON_VERSION_5EX) {
+ nt_version_query &= ~NETLOGON_VERSION_5EX;
+ }
+ ndr_err = ndr_pull_union_blob_all(blob, mem_ctx, r, nt_version_query,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_cldap_netlogon);
+ if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ goto done;
+ }
+ if (nt_version_query & NETLOGON_VERSION_5) {
+ nt_version_query &= ~NETLOGON_VERSION_5;
+ }
+ ndr_err = ndr_pull_union_blob_all(blob, mem_ctx, r, nt_version_query,
+ (ndr_pull_flags_fn_t)ndr_pull_nbt_cldap_netlogon);
+ if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ goto done;
+ }
+
+ return false;
+
+ done:
+ if (DEBUGLEVEL >= 10) {
+ NDR_PRINT_UNION_DEBUG(nbt_cldap_netlogon, nt_version_query, r);
+ }
+
+ *nt_version = nt_version_query;
+
+ return true;
+}
generated by cgit (git 2.34.1) at 2025-02-09 01:57:54 +0000