/* Unix SMB/CIFS implementation. NT Domain Authentication SMB / MSRPC client Copyright (C) Andrew Tridgell 1992-2000 Copyright (C) Jeremy Allison 1998. Largely re-written by Jeremy Allison (C) 2005. Copyright (C) Guenther Deschner 2008. 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 . */ #include "includes.h" #include "system/filesys.h" #include "libsmb/libsmb.h" #include "rpc_client/rpc_client.h" #include "rpc_client/cli_pipe.h" #include "../libcli/auth/libcli_auth.h" #include "../libcli/auth/netlogon_creds_cli.h" #include "../librpc/gen_ndr/ndr_netlogon_c.h" #include "../librpc/gen_ndr/schannel.h" #include "rpc_client/cli_netlogon.h" #include "rpc_client/util_netlogon.h" #include "../libcli/security/security.h" #include "lib/param/param.h" #include "libcli/smb/smbXcli_base.h" #include "dbwrap/dbwrap.h" #include "dbwrap/dbwrap_open.h" #include "util_tdb.h" #include "lib/crypto/gnutls_helpers.h" NTSTATUS rpccli_pre_open_netlogon_creds(void) { static bool already_open = false; TALLOC_CTX *frame; struct loadparm_context *lp_ctx; char *fname; struct db_context *global_db; NTSTATUS status; if (already_open) { return NT_STATUS_OK; } frame = talloc_stackframe(); lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers()); if (lp_ctx == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } fname = lpcfg_private_db_path(frame, lp_ctx, "netlogon_creds_cli"); if (fname == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } global_db = db_open(frame, fname, 0, TDB_CLEAR_IF_FIRST|TDB_INCOMPATIBLE_HASH, O_RDWR|O_CREAT, 0600, DBWRAP_LOCK_ORDER_2, DBWRAP_FLAG_OPTIMIZE_READONLY_ACCESS); if (global_db == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } status = netlogon_creds_cli_set_global_db(&global_db); TALLOC_FREE(frame); if (!NT_STATUS_IS_OK(status)) { return status; } already_open = true; return NT_STATUS_OK; } static NTSTATUS rpccli_create_netlogon_creds( const char *server_computer, const char *server_netbios_domain, const char *server_dns_domain, const char *client_account, enum netr_SchannelType sec_chan_type, struct messaging_context *msg_ctx, TALLOC_CTX *mem_ctx, struct netlogon_creds_cli_context **netlogon_creds) { TALLOC_CTX *frame = talloc_stackframe(); struct loadparm_context *lp_ctx; NTSTATUS status; status = rpccli_pre_open_netlogon_creds(); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); return status; } lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers()); if (lp_ctx == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } status = netlogon_creds_cli_context_global(lp_ctx, msg_ctx, client_account, sec_chan_type, server_computer, server_netbios_domain, server_dns_domain, mem_ctx, netlogon_creds); TALLOC_FREE(frame); if (!NT_STATUS_IS_OK(status)) { return status; } return NT_STATUS_OK; } NTSTATUS rpccli_create_netlogon_creds_ctx( struct cli_credentials *creds, const char *server_computer, struct messaging_context *msg_ctx, TALLOC_CTX *mem_ctx, struct netlogon_creds_cli_context **creds_ctx) { enum netr_SchannelType sec_chan_type; const char *server_netbios_domain; const char *server_dns_domain; const char *client_account; sec_chan_type = cli_credentials_get_secure_channel_type(creds); client_account = cli_credentials_get_username(creds); server_netbios_domain = cli_credentials_get_domain(creds); server_dns_domain = cli_credentials_get_realm(creds); return rpccli_create_netlogon_creds(server_computer, server_netbios_domain, server_dns_domain, client_account, sec_chan_type, msg_ctx, mem_ctx, creds_ctx); } NTSTATUS rpccli_setup_netlogon_creds_locked( struct cli_state *cli, enum dcerpc_transport_t transport, struct netlogon_creds_cli_context *creds_ctx, bool force_reauth, struct cli_credentials *cli_creds, uint32_t *negotiate_flags) { TALLOC_CTX *frame = talloc_stackframe(); struct rpc_pipe_client *netlogon_pipe = NULL; struct netlogon_creds_CredentialState *creds = NULL; uint8_t num_nt_hashes = 0; const struct samr_Password *nt_hashes[2] = { NULL, NULL }; uint8_t idx_nt_hashes = 0; NTSTATUS status; const char *remote_name = NULL; const struct sockaddr_storage *remote_sockaddr = NULL; status = netlogon_creds_cli_get(creds_ctx, frame, &creds); if (NT_STATUS_IS_OK(status)) { const char *action = "using"; if (force_reauth) { action = "overwrite"; } if (cli != NULL) { remote_name = smbXcli_conn_remote_name(cli->conn); } else { remote_name = ""; } DEBUG(5,("%s: %s cached netlogon_creds cli[%s/%s] to %s\n", __FUNCTION__, action, creds->account_name, creds->computer_name, remote_name)); if (!force_reauth) { goto done; } TALLOC_FREE(creds); } nt_hashes[0] = cli_credentials_get_nt_hash(cli_creds, talloc_tos()); if (nt_hashes[0] == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } num_nt_hashes = 1; nt_hashes[1] = cli_credentials_get_old_nt_hash(cli_creds, talloc_tos()); if (nt_hashes[1] != NULL) { num_nt_hashes = 2; } remote_name = smbXcli_conn_remote_name(cli->conn); remote_sockaddr = smbXcli_conn_remote_sockaddr(cli->conn); status = cli_rpc_pipe_open_noauth_transport(cli, transport, &ndr_table_netlogon, remote_name, remote_sockaddr, &netlogon_pipe); if (!NT_STATUS_IS_OK(status)) { DEBUG(5,("%s: failed to open noauth netlogon connection to %s - %s\n", __FUNCTION__, remote_name, nt_errstr(status))); TALLOC_FREE(frame); return status; } talloc_steal(frame, netlogon_pipe); status = netlogon_creds_cli_auth(creds_ctx, netlogon_pipe->binding_handle, num_nt_hashes, nt_hashes, &idx_nt_hashes); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); return status; } status = netlogon_creds_cli_get(creds_ctx, frame, &creds); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); return NT_STATUS_INTERNAL_ERROR; } DEBUG(5,("%s: using new netlogon_creds cli[%s/%s] to %s\n", __FUNCTION__, creds->account_name, creds->computer_name, remote_name)); done: if (negotiate_flags != NULL) { *negotiate_flags = creds->negotiate_flags; } TALLOC_FREE(frame); return NT_STATUS_OK; } NTSTATUS rpccli_setup_netlogon_creds( struct cli_state *cli, enum dcerpc_transport_t transport, struct netlogon_creds_cli_context *creds_ctx, bool force_reauth, struct cli_credentials *cli_creds) { TALLOC_CTX *frame = talloc_stackframe(); struct netlogon_creds_cli_lck *lck; NTSTATUS status; status = netlogon_creds_cli_lck( creds_ctx, NETLOGON_CREDS_CLI_LCK_EXCLUSIVE, frame, &lck); if (!NT_STATUS_IS_OK(status)) { DBG_WARNING("netlogon_creds_cli_lck failed: %s\n", nt_errstr(status)); TALLOC_FREE(frame); return status; } status = rpccli_setup_netlogon_creds_locked( cli, transport, creds_ctx, force_reauth, cli_creds, NULL); TALLOC_FREE(frame); return status; } NTSTATUS rpccli_connect_netlogon( struct cli_state *cli, enum dcerpc_transport_t transport, struct netlogon_creds_cli_context *creds_ctx, bool force_reauth, struct cli_credentials *trust_creds, struct rpc_pipe_client **_rpccli) { TALLOC_CTX *frame = talloc_stackframe(); struct netlogon_creds_CredentialState *creds = NULL; enum netlogon_creds_cli_lck_type lck_type; enum netr_SchannelType sec_chan_type; struct netlogon_creds_cli_lck *lck = NULL; uint32_t negotiate_flags; uint8_t found_session_key[16] = {0}; bool found_existing_creds = false; bool do_serverauth; struct rpc_pipe_client *rpccli; NTSTATUS status; bool retry = false; const char *remote_name = NULL; const struct sockaddr_storage *remote_sockaddr = NULL; sec_chan_type = cli_credentials_get_secure_channel_type(trust_creds); if (sec_chan_type == SEC_CHAN_NULL) { DBG_ERR("secure_channel_type gave SEC_CHAN_NULL\n"); status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO; goto fail; } again: /* * See whether we can use existing netlogon_creds or * whether we have to serverauthenticate. */ status = netlogon_creds_cli_get(creds_ctx, frame, &creds); if (NT_STATUS_IS_OK(status)) { int cmp = memcmp(found_session_key, creds->session_key, sizeof(found_session_key)); found_existing_creds = (cmp != 0); memcpy(found_session_key, creds->session_key, sizeof(found_session_key)); TALLOC_FREE(creds); } lck_type = (force_reauth || !found_existing_creds) ? NETLOGON_CREDS_CLI_LCK_EXCLUSIVE : NETLOGON_CREDS_CLI_LCK_SHARED; status = netlogon_creds_cli_lck(creds_ctx, lck_type, frame, &lck); if (!NT_STATUS_IS_OK(status)) { DBG_DEBUG("netlogon_creds_cli_lck failed: %s\n", nt_errstr(status)); goto fail; } if (!found_existing_creds) { /* * Try to find creds under the lock again. Someone * else might have done it for us. */ status = netlogon_creds_cli_get(creds_ctx, frame, &creds); if (NT_STATUS_IS_OK(status)) { int cmp = memcmp(found_session_key, creds->session_key, sizeof(found_session_key)); found_existing_creds = (cmp != 0); memcpy(found_session_key, creds->session_key, sizeof(found_session_key)); TALLOC_FREE(creds); } } remote_name = smbXcli_conn_remote_name(cli->conn); remote_sockaddr = smbXcli_conn_remote_sockaddr(cli->conn); do_serverauth = force_reauth || !found_existing_creds; if (!do_serverauth) { /* * Do the quick schannel bind without a reauth */ status = cli_rpc_pipe_open_bind_schannel(cli, &ndr_table_netlogon, transport, creds_ctx, remote_name, remote_sockaddr, &rpccli); if (!retry && NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_ACCESS_DENIED)) { DBG_DEBUG("Retrying with serverauthenticate\n"); TALLOC_FREE(lck); retry = true; goto again; } if (!NT_STATUS_IS_OK(status)) { DBG_DEBUG("cli_rpc_pipe_open_bind_schannel " "failed: %s\n", nt_errstr(status)); goto fail; } goto done; } if (cli_credentials_is_anonymous(trust_creds)) { DBG_WARNING("get_trust_credential for %s only gave anonymous," "unable to negotiate NETLOGON credentials\n", netlogon_creds_cli_debug_string( creds_ctx, frame)); status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO; goto fail; } status = rpccli_setup_netlogon_creds_locked( cli, transport, creds_ctx, true, trust_creds, &negotiate_flags); if (!NT_STATUS_IS_OK(status)) { DBG_DEBUG("rpccli_setup_netlogon_creds failed for %s, " "unable to setup NETLOGON credentials: %s\n", netlogon_creds_cli_debug_string( creds_ctx, frame), nt_errstr(status)); goto fail; } if (!(negotiate_flags & NETLOGON_NEG_AUTHENTICATED_RPC)) { if (lp_winbind_sealed_pipes() || lp_require_strong_key()) { status = NT_STATUS_DOWNGRADE_DETECTED; DBG_WARNING("Unwilling to make connection to %s" "without connection level security, " "must set 'winbind sealed pipes = false'" " and 'require strong key = false' " "to proceed: %s\n", netlogon_creds_cli_debug_string( creds_ctx, frame), nt_errstr(status)); goto fail; } status = cli_rpc_pipe_open_noauth_transport(cli, transport, &ndr_table_netlogon, remote_name, remote_sockaddr, &rpccli); if (!NT_STATUS_IS_OK(status)) { DBG_DEBUG("cli_rpc_pipe_open_noauth_transport " "failed: %s\n", nt_errstr(status)); goto fail; } goto done; } status = cli_rpc_pipe_open_bind_schannel(cli, &ndr_table_netlogon, transport, creds_ctx, remote_name, remote_sockaddr, &rpccli); if (!NT_STATUS_IS_OK(status)) { DBG_DEBUG("cli_rpc_pipe_open_bind_schannel " "failed: %s\n", nt_errstr(status)); goto fail; } status = netlogon_creds_cli_check(creds_ctx, rpccli->binding_handle, NULL); if (!NT_STATUS_IS_OK(status)) { DBG_WARNING("netlogon_creds_cli_check failed: %s\n", nt_errstr(status)); goto fail; } done: *_rpccli = rpccli; status = NT_STATUS_OK; fail: ZERO_STRUCT(found_session_key); TALLOC_FREE(lck); TALLOC_FREE(frame); return status; } /* Logon domain user */ NTSTATUS rpccli_netlogon_password_logon( struct netlogon_creds_cli_context *creds_ctx, struct dcerpc_binding_handle *binding_handle, TALLOC_CTX *mem_ctx, uint32_t logon_parameters, const char *domain, const char *username, const char *password, const char *workstation, const uint64_t logon_id, enum netr_LogonInfoClass logon_type, uint8_t *authoritative, uint32_t *flags, uint16_t *_validation_level, union netr_Validation **_validation) { TALLOC_CTX *frame = talloc_stackframe(); NTSTATUS status; union netr_LogonLevel *logon; uint16_t validation_level = 0; union netr_Validation *validation = NULL; char *workstation_slash = NULL; unsigned char local_nt_response[24]; unsigned char local_lm_response[24]; struct samr_Password lmpassword = {.hash = {0}}; struct samr_Password ntpassword = {.hash = {0}}; struct netr_ChallengeResponse lm = {0}; struct netr_ChallengeResponse nt = {0}; logon = talloc_zero(frame, union netr_LogonLevel); if (logon == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } if (workstation == NULL) { workstation = lp_netbios_name(); } workstation_slash = talloc_asprintf(frame, "\\\\%s", workstation); if (workstation_slash == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } /* Initialise input parameters */ switch (logon_type) { case NetlogonInteractiveInformation: case NetlogonInteractiveTransitiveInformation: { struct netr_PasswordInfo *password_info; password_info = talloc_zero(frame, struct netr_PasswordInfo); if (password_info == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } nt_lm_owf_gen(password, ntpassword.hash, lmpassword.hash); password_info->identity_info.domain_name.string = domain; password_info->identity_info.parameter_control = logon_parameters; password_info->identity_info.logon_id = logon_id; password_info->identity_info.account_name.string = username; password_info->identity_info.workstation.string = workstation_slash; password_info->lmpassword = lmpassword; password_info->ntpassword = ntpassword; logon->password = password_info; break; } case NetlogonNetworkInformation: case NetlogonNetworkTransitiveInformation: { struct netr_NetworkInfo *network_info; uint8_t chal[8]; int rc; ZERO_STRUCT(lm); ZERO_STRUCT(nt); network_info = talloc_zero(frame, struct netr_NetworkInfo); if (network_info == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } generate_random_buffer(chal, 8); SMBencrypt(password, chal, local_lm_response); rc = SMBNTencrypt(password, chal, local_nt_response); if (rc != 0) { TALLOC_FREE(frame); return gnutls_error_to_ntstatus(rc, NT_STATUS_ACCESS_DISABLED_BY_POLICY_OTHER); } lm.length = 24; lm.data = local_lm_response; nt.length = 24; nt.data = local_nt_response; network_info->identity_info.domain_name.string = domain; network_info->identity_info.parameter_control = logon_parameters; network_info->identity_info.logon_id = logon_id; network_info->identity_info.account_name.string = username; network_info->identity_info.workstation.string = workstation_slash; memcpy(network_info->challenge, chal, 8); network_info->nt = nt; network_info->lm = lm; logon->network = network_info; break; } default: DEBUG(0, ("switch value %d not supported\n", logon_type)); TALLOC_FREE(frame); return NT_STATUS_INVALID_INFO_CLASS; } status = netlogon_creds_cli_LogonSamLogon(creds_ctx, binding_handle, logon_type, logon, mem_ctx, &validation_level, &validation, authoritative, flags); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); return status; } TALLOC_FREE(frame); *_validation_level = validation_level; *_validation = validation; return NT_STATUS_OK; } /** * Logon domain user with an 'network' SAM logon * * @param info3 Pointer to a NET_USER_INFO_3 already allocated by the caller. **/ NTSTATUS rpccli_netlogon_network_logon( struct netlogon_creds_cli_context *creds_ctx, struct dcerpc_binding_handle *binding_handle, TALLOC_CTX *mem_ctx, uint32_t logon_parameters, const char *username, const char *domain, const char *workstation, const uint64_t logon_id, const uint8_t chal[8], DATA_BLOB lm_response, DATA_BLOB nt_response, enum netr_LogonInfoClass logon_type, uint8_t *authoritative, uint32_t *flags, uint16_t *_validation_level, union netr_Validation **_validation) { NTSTATUS status; const char *workstation_name_slash; union netr_LogonLevel *logon = NULL; struct netr_NetworkInfo *network_info; uint16_t validation_level = 0; union netr_Validation *validation = NULL; struct netr_ChallengeResponse lm; struct netr_ChallengeResponse nt; *_validation = NULL; ZERO_STRUCT(lm); ZERO_STRUCT(nt); switch (logon_type) { case NetlogonNetworkInformation: case NetlogonNetworkTransitiveInformation: break; default: DEBUG(0, ("switch value %d not supported\n", logon_type)); return NT_STATUS_INVALID_INFO_CLASS; } logon = talloc_zero(mem_ctx, union netr_LogonLevel); if (!logon) { return NT_STATUS_NO_MEMORY; } network_info = talloc_zero(mem_ctx, struct netr_NetworkInfo); if (!network_info) { return NT_STATUS_NO_MEMORY; } if (workstation[0] != '\\' && workstation[1] != '\\') { workstation_name_slash = talloc_asprintf(mem_ctx, "\\\\%s", workstation); } else { workstation_name_slash = workstation; } if (!workstation_name_slash) { DEBUG(0, ("talloc_asprintf failed!\n")); return NT_STATUS_NO_MEMORY; } /* Initialise input parameters */ lm.data = lm_response.data; lm.length = lm_response.length; nt.data = nt_response.data; nt.length = nt_response.length; network_info->identity_info.domain_name.string = domain; network_info->identity_info.parameter_control = logon_parameters; network_info->identity_info.logon_id = logon_id; network_info->identity_info.account_name.string = username; network_info->identity_info.workstation.string = workstation_name_slash; memcpy(network_info->challenge, chal, 8); network_info->nt = nt; network_info->lm = lm; logon->network = network_info; /* Marshall data and send request */ status = netlogon_creds_cli_LogonSamLogon(creds_ctx, binding_handle, logon_type, logon, mem_ctx, &validation_level, &validation, authoritative, flags); if (!NT_STATUS_IS_OK(status)) { return status; } *_validation_level = validation_level; *_validation = validation; return NT_STATUS_OK; } NTSTATUS rpccli_netlogon_interactive_logon( struct netlogon_creds_cli_context *creds_ctx, struct dcerpc_binding_handle *binding_handle, TALLOC_CTX *mem_ctx, uint32_t logon_parameters, const char *username, const char *domain, const char *workstation, const uint64_t logon_id, DATA_BLOB lm_hash, DATA_BLOB nt_hash, enum netr_LogonInfoClass logon_type, uint8_t *authoritative, uint32_t *flags, uint16_t *_validation_level, union netr_Validation **_validation) { TALLOC_CTX *frame = talloc_stackframe(); NTSTATUS status; const char *workstation_name_slash; union netr_LogonLevel *logon = NULL; struct netr_PasswordInfo *password_info = NULL; uint16_t validation_level = 0; union netr_Validation *validation = NULL; struct netr_ChallengeResponse lm; struct netr_ChallengeResponse nt; *_validation = NULL; ZERO_STRUCT(lm); ZERO_STRUCT(nt); switch (logon_type) { case NetlogonInteractiveInformation: case NetlogonInteractiveTransitiveInformation: break; default: DEBUG(0, ("switch value %d not supported\n", logon_type)); TALLOC_FREE(frame); return NT_STATUS_INVALID_INFO_CLASS; } logon = talloc_zero(mem_ctx, union netr_LogonLevel); if (logon == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } password_info = talloc_zero(logon, struct netr_PasswordInfo); if (password_info == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } if (workstation[0] != '\\' && workstation[1] != '\\') { workstation_name_slash = talloc_asprintf(frame, "\\\\%s", workstation); } else { workstation_name_slash = workstation; } if (workstation_name_slash == NULL) { TALLOC_FREE(frame); return NT_STATUS_NO_MEMORY; } /* Initialise input parameters */ password_info->identity_info.domain_name.string = domain; password_info->identity_info.parameter_control = logon_parameters; password_info->identity_info.logon_id = logon_id; password_info->identity_info.account_name.string = username; password_info->identity_info.workstation.string = workstation_name_slash; if (nt_hash.length != sizeof(password_info->ntpassword.hash)) { TALLOC_FREE(frame); return NT_STATUS_INVALID_PARAMETER; } memcpy(password_info->ntpassword.hash, nt_hash.data, nt_hash.length); if (lm_hash.length != 0) { if (lm_hash.length != sizeof(password_info->lmpassword.hash)) { TALLOC_FREE(frame); return NT_STATUS_INVALID_PARAMETER; } memcpy(password_info->lmpassword.hash, lm_hash.data, lm_hash.length); } logon->password = password_info; /* Marshall data and send request */ status = netlogon_creds_cli_LogonSamLogon(creds_ctx, binding_handle, logon_type, logon, mem_ctx, &validation_level, &validation, authoritative, flags); if (!NT_STATUS_IS_OK(status)) { TALLOC_FREE(frame); return status; } *_validation_level = validation_level; *_validation = validation; TALLOC_FREE(frame); return NT_STATUS_OK; }