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8a650243b3
This means we no longer need two different map to guest functions and have consistent logic with fewer layering violations. Andrew Bartlett Signed-off-by: Andrew Tridgell <tridge@samba.org>
260 lines
8.7 KiB
C
260 lines
8.7 KiB
C
/*
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Unix SMB/Netbios implementation.
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Version 3.0
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handle NLTMSSP, server side
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Andrew Bartlett 2001-2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "auth.h"
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#include "../libcli/auth/ntlmssp.h"
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#include "ntlmssp_wrap.h"
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#include "../librpc/gen_ndr/netlogon.h"
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#include "../lib/tsocket/tsocket.h"
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NTSTATUS auth_ntlmssp_steal_session_info(TALLOC_CTX *mem_ctx,
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struct auth_ntlmssp_state *auth_ntlmssp_state,
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struct auth_session_info **session_info)
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{
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NTSTATUS nt_status = create_local_token(mem_ctx,
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auth_ntlmssp_state->server_info,
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&auth_ntlmssp_state->ntlmssp_state->session_key,
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session_info);
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if (!NT_STATUS_IS_OK(nt_status)) {
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DEBUG(10, ("create_local_token failed: %s\n",
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nt_errstr(nt_status)));
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}
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return nt_status;
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}
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/**
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* Return the challenge as determined by the authentication subsystem
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* @return an 8 byte random challenge
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*/
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static NTSTATUS auth_ntlmssp_get_challenge(const struct ntlmssp_state *ntlmssp_state,
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uint8_t chal[8])
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{
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struct auth_ntlmssp_state *auth_ntlmssp_state =
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(struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
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auth_ntlmssp_state->auth_context->get_ntlm_challenge(
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auth_ntlmssp_state->auth_context, chal);
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return NT_STATUS_OK;
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}
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/**
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* Some authentication methods 'fix' the challenge, so we may not be able to set it
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*
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* @return If the effective challenge used by the auth subsystem may be modified
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*/
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static bool auth_ntlmssp_may_set_challenge(const struct ntlmssp_state *ntlmssp_state)
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{
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struct auth_ntlmssp_state *auth_ntlmssp_state =
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(struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
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struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
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return auth_context->challenge_may_be_modified;
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}
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/**
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* NTLM2 authentication modifies the effective challenge,
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* @param challenge The new challenge value
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*/
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static NTSTATUS auth_ntlmssp_set_challenge(struct ntlmssp_state *ntlmssp_state, DATA_BLOB *challenge)
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{
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struct auth_ntlmssp_state *auth_ntlmssp_state =
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(struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
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struct auth_context *auth_context = auth_ntlmssp_state->auth_context;
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SMB_ASSERT(challenge->length == 8);
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auth_context->challenge = data_blob_talloc(auth_context,
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challenge->data, challenge->length);
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auth_context->challenge_set_by = "NTLMSSP callback (NTLM2)";
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DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
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DEBUG(5, ("challenge is: \n"));
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dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
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return NT_STATUS_OK;
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}
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/**
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* Check the password on an NTLMSSP login.
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*
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* Return the session keys used on the connection.
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*/
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static NTSTATUS auth_ntlmssp_check_password(struct ntlmssp_state *ntlmssp_state, TALLOC_CTX *mem_ctx,
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DATA_BLOB *session_key, DATA_BLOB *lm_session_key)
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{
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struct auth_ntlmssp_state *auth_ntlmssp_state =
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(struct auth_ntlmssp_state *)ntlmssp_state->callback_private;
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struct auth_usersupplied_info *user_info = NULL;
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NTSTATUS nt_status;
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bool username_was_mapped;
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/* the client has given us its machine name (which we otherwise would not get on port 445).
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we need to possibly reload smb.conf if smb.conf includes depend on the machine name */
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set_remote_machine_name(auth_ntlmssp_state->ntlmssp_state->client.netbios_name, True);
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/* setup the string used by %U */
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/* sub_set_smb_name checks for weird internally */
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sub_set_smb_name(auth_ntlmssp_state->ntlmssp_state->user);
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lp_load(get_dyn_CONFIGFILE(), false, false, true, true);
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nt_status = make_user_info_map(&user_info,
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auth_ntlmssp_state->ntlmssp_state->user,
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auth_ntlmssp_state->ntlmssp_state->domain,
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auth_ntlmssp_state->ntlmssp_state->client.netbios_name,
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auth_ntlmssp_state->remote_address,
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auth_ntlmssp_state->ntlmssp_state->lm_resp.data ? &auth_ntlmssp_state->ntlmssp_state->lm_resp : NULL,
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auth_ntlmssp_state->ntlmssp_state->nt_resp.data ? &auth_ntlmssp_state->ntlmssp_state->nt_resp : NULL,
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NULL, NULL, NULL,
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AUTH_PASSWORD_RESPONSE);
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if (!NT_STATUS_IS_OK(nt_status)) {
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return nt_status;
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}
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user_info->logon_parameters = MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT | MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT;
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nt_status = auth_ntlmssp_state->auth_context->check_ntlm_password(auth_ntlmssp_state->auth_context,
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user_info, &auth_ntlmssp_state->server_info);
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username_was_mapped = user_info->was_mapped;
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free_user_info(&user_info);
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if (!NT_STATUS_IS_OK(nt_status)) {
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nt_status = do_map_to_guest_server_info(nt_status,
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&auth_ntlmssp_state->server_info,
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auth_ntlmssp_state->ntlmssp_state->user,
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auth_ntlmssp_state->ntlmssp_state->domain);
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return nt_status;
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}
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auth_ntlmssp_state->server_info->nss_token |= username_was_mapped;
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/* Clear out the session keys, and pass them to the caller.
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* They will not be used in this form again - instead the
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* NTLMSSP code will decide on the final correct session key,
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* and put it back here at the end of
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* auth_ntlmssp_steal_server_info */
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if (auth_ntlmssp_state->server_info->session_key.length) {
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DEBUG(10, ("Got NT session key of length %u\n",
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(unsigned int)auth_ntlmssp_state->server_info->session_key.length));
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*session_key = auth_ntlmssp_state->server_info->session_key;
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talloc_steal(mem_ctx, auth_ntlmssp_state->server_info->session_key.data);
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auth_ntlmssp_state->server_info->session_key = data_blob_null;
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}
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if (auth_ntlmssp_state->server_info->lm_session_key.length) {
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DEBUG(10, ("Got LM session key of length %u\n",
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(unsigned int)auth_ntlmssp_state->server_info->lm_session_key.length));
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*lm_session_key = auth_ntlmssp_state->server_info->lm_session_key;
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talloc_steal(mem_ctx, auth_ntlmssp_state->server_info->lm_session_key.data);
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auth_ntlmssp_state->server_info->lm_session_key = data_blob_null;
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}
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return nt_status;
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}
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static int auth_ntlmssp_state_destructor(void *ptr);
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NTSTATUS auth_ntlmssp_start(const struct tsocket_address *remote_address,
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struct auth_ntlmssp_state **auth_ntlmssp_state)
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{
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NTSTATUS nt_status;
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bool is_standalone;
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const char *netbios_name;
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const char *netbios_domain;
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const char *dns_name;
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char *dns_domain;
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struct auth_ntlmssp_state *ans;
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struct auth_context *auth_context;
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if ((enum server_role)lp_server_role() == ROLE_STANDALONE) {
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is_standalone = true;
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} else {
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is_standalone = false;
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}
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netbios_name = lp_netbios_name();
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netbios_domain = lp_workgroup();
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/* This should be a 'netbios domain -> DNS domain' mapping */
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dns_domain = get_mydnsdomname(talloc_tos());
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if (dns_domain) {
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strlower_m(dns_domain);
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}
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dns_name = get_mydnsfullname();
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ans = talloc_zero(NULL, struct auth_ntlmssp_state);
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if (!ans) {
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DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
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return NT_STATUS_NO_MEMORY;
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}
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ans->remote_address = tsocket_address_copy(remote_address, ans);
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if (ans->remote_address == NULL) {
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DEBUG(0,("auth_ntlmssp_start: talloc failed!\n"));
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return NT_STATUS_NO_MEMORY;
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}
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nt_status = ntlmssp_server_start(ans,
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is_standalone,
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netbios_name,
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netbios_domain,
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dns_name,
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dns_domain,
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&ans->ntlmssp_state);
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if (!NT_STATUS_IS_OK(nt_status)) {
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return nt_status;
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}
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nt_status = make_auth_context_subsystem(talloc_tos(), &auth_context);
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if (!NT_STATUS_IS_OK(nt_status)) {
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return nt_status;
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}
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ans->auth_context = talloc_steal(ans, auth_context);
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ans->ntlmssp_state->callback_private = ans;
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ans->ntlmssp_state->get_challenge = auth_ntlmssp_get_challenge;
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ans->ntlmssp_state->may_set_challenge = auth_ntlmssp_may_set_challenge;
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ans->ntlmssp_state->set_challenge = auth_ntlmssp_set_challenge;
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ans->ntlmssp_state->check_password = auth_ntlmssp_check_password;
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talloc_set_destructor((TALLOC_CTX *)ans, auth_ntlmssp_state_destructor);
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*auth_ntlmssp_state = ans;
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return NT_STATUS_OK;
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}
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static int auth_ntlmssp_state_destructor(void *ptr)
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{
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struct auth_ntlmssp_state *ans;
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ans = talloc_get_type(ptr, struct auth_ntlmssp_state);
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TALLOC_FREE(ans->remote_address);
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TALLOC_FREE(ans->server_info);
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TALLOC_FREE(ans->ntlmssp_state);
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return 0;
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}
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