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Diffstat (limited to 'source3/utils/net_rpc_join.c')
-rw-r--r--source3/utils/net_rpc_join.c506
1 files changed, 506 insertions, 0 deletions
diff --git a/source3/utils/net_rpc_join.c b/source3/utils/net_rpc_join.c
new file mode 100644
index 0000000000..5bc38f979f
--- /dev/null
+++ b/source3/utils/net_rpc_join.c
@@ -0,0 +1,506 @@
+/*
+ Samba Unix/Linux SMB client library
+ Distributed SMB/CIFS Server Management Utility
+ Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org)
+ Copyright (C) Tim Potter 2001
+ Copyright (C) 2008 Guenther Deschner
+
+ 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"
+#include "utils/net.h"
+
+/* Macro for checking RPC error codes to make things more readable */
+
+#define CHECK_RPC_ERR(rpc, msg) \
+ if (!NT_STATUS_IS_OK(result = rpc)) { \
+ DEBUG(0, (msg ": %s\n", nt_errstr(result))); \
+ goto done; \
+ }
+
+#define CHECK_RPC_ERR_DEBUG(rpc, debug_args) \
+ if (!NT_STATUS_IS_OK(result = rpc)) { \
+ DEBUG(0, debug_args); \
+ goto done; \
+ }
+
+/**
+ * confirm that a domain join is still valid
+ *
+ * @return A shell status integer (0 for success)
+ *
+ **/
+NTSTATUS net_rpc_join_ok(struct net_context *c, const char *domain,
+ const char *server, struct sockaddr_storage *pss)
+{
+ enum security_types sec;
+ unsigned int conn_flags = NET_FLAGS_PDC;
+ uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+ struct cli_state *cli = NULL;
+ struct rpc_pipe_client *pipe_hnd = NULL;
+ struct rpc_pipe_client *netlogon_pipe = NULL;
+ NTSTATUS ntret = NT_STATUS_UNSUCCESSFUL;
+
+ sec = (enum security_types)lp_security();
+
+ if (sec == SEC_ADS) {
+ /* Connect to IPC$ using machine account's credentials. We don't use anonymous
+ connection here, as it may be denied by server's local policy. */
+ net_use_machine_account(c);
+
+ } else {
+ /* some servers (e.g. WinNT) don't accept machine-authenticated
+ smb connections */
+ conn_flags |= NET_FLAGS_ANONYMOUS;
+ }
+
+ /* Connect to remote machine */
+ ntret = net_make_ipc_connection_ex(c, domain, server, pss, conn_flags,
+ &cli);
+ if (!NT_STATUS_IS_OK(ntret)) {
+ return ntret;
+ }
+
+ /* Setup the creds as though we're going to do schannel... */
+ ntret = get_schannel_session_key(cli, domain, &neg_flags,
+ &netlogon_pipe);
+
+ /* We return NT_STATUS_INVALID_NETWORK_RESPONSE if the server is refusing
+ to negotiate schannel, but the creds were set up ok. That'll have to do. */
+
+ if (!NT_STATUS_IS_OK(ntret)) {
+ if (NT_STATUS_EQUAL(ntret, NT_STATUS_INVALID_NETWORK_RESPONSE)) {
+ cli_shutdown(cli);
+ return NT_STATUS_OK;
+ } else {
+ DEBUG(0,("net_rpc_join_ok: failed to get schannel session "
+ "key from server %s for domain %s. Error was %s\n",
+ cli->desthost, domain, nt_errstr(ntret) ));
+ cli_shutdown(cli);
+ return ntret;
+ }
+ }
+
+ /* Only do the rest of the schannel test if the client is allowed to do this. */
+ if (!lp_client_schannel()) {
+ cli_shutdown(cli);
+ /* We're good... */
+ return ntret;
+ }
+
+ ntret = cli_rpc_pipe_open_schannel_with_key(
+ cli, &ndr_table_netlogon.syntax_id, PIPE_AUTH_LEVEL_PRIVACY,
+ domain, netlogon_pipe->dc, &pipe_hnd);
+
+ if (!NT_STATUS_IS_OK(ntret)) {
+ DEBUG(0,("net_rpc_join_ok: failed to open schannel session "
+ "on netlogon pipe to server %s for domain %s. Error was %s\n",
+ cli->desthost, domain, nt_errstr(ntret) ));
+ /*
+ * Note: here, we have:
+ * (pipe_hnd != NULL) if and only if NT_STATUS_IS_OK(ntret)
+ */
+ }
+
+ cli_shutdown(cli);
+ return ntret;
+}
+
+/**
+ * Join a domain using the administrator username and password
+ *
+ * @param argc Standard main() style argc
+ * @param argc Standard main() style argv. Initial components are already
+ * stripped. Currently not used.
+ * @return A shell status integer (0 for success)
+ *
+ **/
+
+int net_rpc_join_newstyle(struct net_context *c, int argc, const char **argv)
+{
+
+ /* libsmb variables */
+
+ struct cli_state *cli;
+ TALLOC_CTX *mem_ctx;
+ uint32 acb_info = ACB_WSTRUST;
+ uint32_t neg_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
+ uint32 sec_channel_type;
+ struct rpc_pipe_client *pipe_hnd = NULL;
+
+ /* rpc variables */
+
+ POLICY_HND lsa_pol, sam_pol, domain_pol, user_pol;
+ DOM_SID *domain_sid;
+ uint32 user_rid;
+
+ /* Password stuff */
+
+ char *clear_trust_password = NULL;
+ struct samr_CryptPassword crypt_pwd;
+ uchar md4_trust_password[16];
+ union samr_UserInfo set_info;
+
+ /* Misc */
+
+ NTSTATUS result;
+ int retval = 1;
+ const char *domain = NULL;
+ char *acct_name;
+ struct lsa_String lsa_acct_name;
+ uint32 acct_flags=0;
+ uint32_t access_granted = 0;
+ union lsa_PolicyInformation *info = NULL;
+ struct samr_Ids user_rids;
+ struct samr_Ids name_types;
+
+ /* check what type of join */
+ if (argc >= 0) {
+ sec_channel_type = get_sec_channel_type(argv[0]);
+ } else {
+ sec_channel_type = get_sec_channel_type(NULL);
+ }
+
+ switch (sec_channel_type) {
+ case SEC_CHAN_WKSTA:
+ acb_info = ACB_WSTRUST;
+ break;
+ case SEC_CHAN_BDC:
+ acb_info = ACB_SVRTRUST;
+ break;
+#if 0
+ case SEC_CHAN_DOMAIN:
+ acb_info = ACB_DOMTRUST;
+ break;
+#endif
+ }
+
+ /* Make authenticated connection to remote machine */
+
+ result = net_make_ipc_connection(c, NET_FLAGS_PDC, &cli);
+ if (!NT_STATUS_IS_OK(result)) {
+ return 1;
+ }
+
+ if (!(mem_ctx = talloc_init("net_rpc_join_newstyle"))) {
+ DEBUG(0, ("Could not initialise talloc context\n"));
+ goto done;
+ }
+
+ /* Fetch domain sid */
+
+ result = cli_rpc_pipe_open_noauth(cli, &ndr_table_lsarpc.syntax_id,
+ &pipe_hnd);
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(0, ("Error connecting to LSA pipe. Error was %s\n",
+ nt_errstr(result) ));
+ goto done;
+ }
+
+
+ CHECK_RPC_ERR(rpccli_lsa_open_policy(pipe_hnd, mem_ctx, true,
+ SEC_RIGHTS_MAXIMUM_ALLOWED,
+ &lsa_pol),
+ "error opening lsa policy handle");
+
+ CHECK_RPC_ERR(rpccli_lsa_QueryInfoPolicy(pipe_hnd, mem_ctx,
+ &lsa_pol,
+ LSA_POLICY_INFO_ACCOUNT_DOMAIN,
+ &info),
+ "error querying info policy");
+
+ domain = info->account_domain.name.string;
+ domain_sid = info->account_domain.sid;
+
+ rpccli_lsa_Close(pipe_hnd, mem_ctx, &lsa_pol);
+ TALLOC_FREE(pipe_hnd); /* Done with this pipe */
+
+ /* Bail out if domain didn't get set. */
+ if (!domain) {
+ DEBUG(0, ("Could not get domain name.\n"));
+ goto done;
+ }
+
+ /* Create domain user */
+ result = cli_rpc_pipe_open_noauth(cli, &ndr_table_samr.syntax_id,
+ &pipe_hnd);
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(0, ("Error connecting to SAM pipe. Error was %s\n",
+ nt_errstr(result) ));
+ goto done;
+ }
+
+ CHECK_RPC_ERR(rpccli_samr_Connect2(pipe_hnd, mem_ctx,
+ pipe_hnd->desthost,
+ SEC_RIGHTS_MAXIMUM_ALLOWED,
+ &sam_pol),
+ "could not connect to SAM database");
+
+
+ CHECK_RPC_ERR(rpccli_samr_OpenDomain(pipe_hnd, mem_ctx,
+ &sam_pol,
+ SEC_RIGHTS_MAXIMUM_ALLOWED,
+ domain_sid,
+ &domain_pol),
+ "could not open domain");
+
+ /* Create domain user */
+ if ((acct_name = talloc_asprintf(mem_ctx, "%s$", global_myname())) == NULL) {
+ result = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+ strlower_m(acct_name);
+
+ init_lsa_String(&lsa_acct_name, acct_name);
+
+ acct_flags = SEC_GENERIC_READ | SEC_GENERIC_WRITE | SEC_GENERIC_EXECUTE |
+ SEC_STD_WRITE_DAC | SEC_STD_DELETE |
+ SAMR_USER_ACCESS_SET_PASSWORD |
+ SAMR_USER_ACCESS_GET_ATTRIBUTES |
+ SAMR_USER_ACCESS_SET_ATTRIBUTES;
+
+ DEBUG(10, ("Creating account with flags: %d\n",acct_flags));
+
+ result = rpccli_samr_CreateUser2(pipe_hnd, mem_ctx,
+ &domain_pol,
+ &lsa_acct_name,
+ acb_info,
+ acct_flags,
+ &user_pol,
+ &access_granted,
+ &user_rid);
+
+ if (!NT_STATUS_IS_OK(result) &&
+ !NT_STATUS_EQUAL(result, NT_STATUS_USER_EXISTS)) {
+ d_fprintf(stderr, "Creation of workstation account failed\n");
+
+ /* If NT_STATUS_ACCESS_DENIED then we have a valid
+ username/password combo but the user does not have
+ administrator access. */
+
+ if (NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED))
+ d_fprintf(stderr, "User specified does not have administrator privileges\n");
+
+ goto done;
+ }
+
+ /* We *must* do this.... don't ask... */
+
+ if (NT_STATUS_IS_OK(result)) {
+ rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol);
+ }
+
+ CHECK_RPC_ERR_DEBUG(rpccli_samr_LookupNames(pipe_hnd, mem_ctx,
+ &domain_pol,
+ 1,
+ &lsa_acct_name,
+ &user_rids,
+ &name_types),
+ ("error looking up rid for user %s: %s\n",
+ acct_name, nt_errstr(result)));
+
+ if (name_types.ids[0] != SID_NAME_USER) {
+ DEBUG(0, ("%s is not a user account (type=%d)\n", acct_name, name_types.ids[0]));
+ goto done;
+ }
+
+ user_rid = user_rids.ids[0];
+
+ /* Open handle on user */
+
+ CHECK_RPC_ERR_DEBUG(
+ rpccli_samr_OpenUser(pipe_hnd, mem_ctx,
+ &domain_pol,
+ SEC_RIGHTS_MAXIMUM_ALLOWED,
+ user_rid,
+ &user_pol),
+ ("could not re-open existing user %s: %s\n",
+ acct_name, nt_errstr(result)));
+
+ /* Create a random machine account password */
+
+ {
+ char *str;
+ str = generate_random_str(DEFAULT_TRUST_ACCOUNT_PASSWORD_LENGTH);
+ clear_trust_password = SMB_STRDUP(str);
+ E_md4hash(clear_trust_password, md4_trust_password);
+ }
+
+ /* Set password on machine account */
+
+ init_samr_CryptPassword(clear_trust_password,
+ &cli->user_session_key,
+ &crypt_pwd);
+
+ init_samr_user_info24(&set_info.info24, crypt_pwd.data, 24);
+
+ CHECK_RPC_ERR(rpccli_samr_SetUserInfo2(pipe_hnd, mem_ctx,
+ &user_pol,
+ 24,
+ &set_info),
+ "error setting trust account password");
+
+ /* Why do we have to try to (re-)set the ACB to be the same as what
+ we passed in the samr_create_dom_user() call? When a NT
+ workstation is joined to a domain by an administrator the
+ acb_info is set to 0x80. For a normal user with "Add
+ workstations to the domain" rights the acb_info is 0x84. I'm
+ not sure whether it is supposed to make a difference or not. NT
+ seems to cope with either value so don't bomb out if the set
+ userinfo2 level 0x10 fails. -tpot */
+
+ set_info.info16.acct_flags = acb_info;
+
+ /* Ignoring the return value is necessary for joining a domain
+ as a normal user with "Add workstation to domain" privilege. */
+
+ result = rpccli_samr_SetUserInfo(pipe_hnd, mem_ctx,
+ &user_pol,
+ 16,
+ &set_info);
+
+ rpccli_samr_Close(pipe_hnd, mem_ctx, &user_pol);
+ TALLOC_FREE(pipe_hnd); /* Done with this pipe */
+
+ /* Now check the whole process from top-to-bottom */
+
+ result = cli_rpc_pipe_open_noauth(cli, &ndr_table_netlogon.syntax_id,
+ &pipe_hnd);
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(0,("Error connecting to NETLOGON pipe. Error was %s\n",
+ nt_errstr(result) ));
+ goto done;
+ }
+
+ result = rpccli_netlogon_setup_creds(pipe_hnd,
+ cli->desthost, /* server name */
+ domain, /* domain */
+ global_myname(), /* client name */
+ global_myname(), /* machine account name */
+ md4_trust_password,
+ sec_channel_type,
+ &neg_flags);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(0, ("Error in domain join verification (credential setup failed): %s\n\n",
+ nt_errstr(result)));
+
+ if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
+ (sec_channel_type == SEC_CHAN_BDC) ) {
+ d_fprintf(stderr, "Please make sure that no computer account\n"
+ "named like this machine (%s) exists in the domain\n",
+ global_myname());
+ }
+
+ goto done;
+ }
+
+ /* We can only check the schannel connection if the client is allowed
+ to do this and the server supports it. If not, just assume success
+ (after all the rpccli_netlogon_setup_creds() succeeded, and we'll
+ do the same again (setup creds) in net_rpc_join_ok(). JRA. */
+
+ if (lp_client_schannel() && (neg_flags & NETLOGON_NEG_SCHANNEL)) {
+ struct rpc_pipe_client *netlogon_schannel_pipe;
+
+ result = cli_rpc_pipe_open_schannel_with_key(
+ cli, &ndr_table_netlogon.syntax_id,
+ PIPE_AUTH_LEVEL_PRIVACY, domain, pipe_hnd->dc,
+ &netlogon_schannel_pipe);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ DEBUG(0, ("Error in domain join verification (schannel setup failed): %s\n\n",
+ nt_errstr(result)));
+
+ if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) &&
+ (sec_channel_type == SEC_CHAN_BDC) ) {
+ d_fprintf(stderr, "Please make sure that no computer account\n"
+ "named like this machine (%s) exists in the domain\n",
+ global_myname());
+ }
+
+ goto done;
+ }
+ TALLOC_FREE(netlogon_schannel_pipe);
+ }
+
+ TALLOC_FREE(pipe_hnd);
+
+ /* Now store the secret in the secrets database */
+
+ strupper_m(CONST_DISCARD(char *, domain));
+
+ if (!secrets_store_domain_sid(domain, domain_sid)) {
+ DEBUG(0, ("error storing domain sid for %s\n", domain));
+ goto done;
+ }
+
+ if (!secrets_store_machine_password(clear_trust_password, domain, sec_channel_type)) {
+ DEBUG(0, ("error storing plaintext domain secrets for %s\n", domain));
+ }
+
+ /* double-check, connection from scratch */
+ result = net_rpc_join_ok(c, domain, cli->desthost, &cli->dest_ss);
+ retval = NT_STATUS_IS_OK(result) ? 0 : -1;
+
+done:
+
+ /* Display success or failure */
+
+ if (domain) {
+ if (retval != 0) {
+ fprintf(stderr,"Unable to join domain %s.\n",domain);
+ } else {
+ printf("Joined domain %s.\n",domain);
+ }
+ }
+
+ cli_shutdown(cli);
+
+ SAFE_FREE(clear_trust_password);
+
+ return retval;
+}
+
+/**
+ * check that a join is OK
+ *
+ * @return A shell status integer (0 for success)
+ *
+ **/
+int net_rpc_testjoin(struct net_context *c, int argc, const char **argv)
+{
+ char *domain = smb_xstrdup(c->opt_target_workgroup);
+ NTSTATUS nt_status;
+
+ if (c->display_usage) {
+ d_printf("Usage\n"
+ "net rpc testjoin\n"
+ " Test if a join is OK\n");
+ return 0;
+ }
+
+ /* Display success or failure */
+ nt_status = net_rpc_join_ok(c, domain, NULL, NULL);
+ if (!NT_STATUS_IS_OK(nt_status)) {
+ fprintf(stderr,"Join to domain '%s' is not valid: %s\n",
+ domain, nt_errstr(nt_status));
+ free(domain);
+ return -1;
+ }
+
+ printf("Join to '%s' is OK\n",domain);
+ free(domain);
+ return 0;
+}
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