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https://github.com/samba-team/samba.git
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c0fc6a6d7f
We now include a MsvAvTimestamp in our target info as indication for the client to include a NTLMSSP_MIC in the AUTH_MESSAGE. If the client uses NTLMv2 we check NTLMSSP_AVFLAG_MIC_IN_AUTHENTICATE_MESSAGE and require a valid MIC. This is still disabled if the "map to guest" feature is used. BUG: https://bugzilla.samba.org/show_bug.cgi?id=11644 Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Günther Deschner <gd@samba.org>
247 lines
6.7 KiB
C
247 lines
6.7 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Version 3.0
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* NTLMSSP Signing routines
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* Copyright (C) Luke Kenneth Casson Leighton 1996-2001
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* Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003-2005
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*
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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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*
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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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*
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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/ntlmssp/ntlmssp.h"
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#include "auth/gensec/gensec.h"
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#include "auth/gensec/gensec_internal.h"
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#include "auth/ntlmssp/ntlmssp_private.h"
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NTSTATUS gensec_ntlmssp_magic(struct gensec_security *gensec_security,
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const DATA_BLOB *first_packet)
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{
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if (ntlmssp_blob_matches_magic(first_packet)) {
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return NT_STATUS_OK;
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} else {
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return NT_STATUS_INVALID_PARAMETER;
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}
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}
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/**
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* Return the NTLMSSP master session key
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*
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* @param ntlmssp_state NTLMSSP State
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*/
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NTSTATUS gensec_ntlmssp_session_key(struct gensec_security *gensec_security,
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TALLOC_CTX *mem_ctx,
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DATA_BLOB *session_key)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
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if (ntlmssp_state->expected_state != NTLMSSP_DONE) {
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return NT_STATUS_NO_USER_SESSION_KEY;
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}
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if (!ntlmssp_state->session_key.data) {
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return NT_STATUS_NO_USER_SESSION_KEY;
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}
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*session_key = data_blob_talloc(mem_ctx, ntlmssp_state->session_key.data, ntlmssp_state->session_key.length);
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if (!session_key->data) {
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return NT_STATUS_NO_MEMORY;
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}
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return NT_STATUS_OK;
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}
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bool gensec_ntlmssp_have_feature(struct gensec_security *gensec_security,
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uint32_t feature)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
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if (feature & GENSEC_FEATURE_SIGN) {
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if (!ntlmssp_state->session_key.length) {
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return false;
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}
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN) {
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return true;
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}
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}
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if (feature & GENSEC_FEATURE_SEAL) {
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if (!ntlmssp_state->session_key.length) {
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return false;
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}
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SEAL) {
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return true;
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}
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}
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if (feature & GENSEC_FEATURE_SESSION_KEY) {
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if (ntlmssp_state->session_key.length) {
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return true;
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}
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}
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if (feature & GENSEC_FEATURE_DCE_STYLE) {
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return true;
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}
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if (feature & GENSEC_FEATURE_ASYNC_REPLIES) {
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if (ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
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return true;
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}
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}
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if (feature & GENSEC_FEATURE_SIGN_PKT_HEADER) {
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return true;
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}
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if (feature & GENSEC_FEATURE_NEW_SPNEGO) {
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if (!ntlmssp_state->session_key.length) {
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return false;
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}
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if (!(ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
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return false;
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}
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return ntlmssp_state->new_spnego;
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}
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return false;
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}
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NTSTATUS gensec_ntlmssp_start(struct gensec_security *gensec_security)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp;
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gensec_ntlmssp = talloc_zero(gensec_security,
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struct gensec_ntlmssp_context);
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if (!gensec_ntlmssp) {
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return NT_STATUS_NO_MEMORY;
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}
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gensec_security->private_data = gensec_ntlmssp;
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return NT_STATUS_OK;
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}
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NTSTATUS gensec_ntlmssp_sign_packet(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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const uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_sign_packet(gensec_ntlmssp->ntlmssp_state,
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sig_mem_ctx,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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NTSTATUS gensec_ntlmssp_check_packet(struct gensec_security *gensec_security,
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const uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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const DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_check_packet(gensec_ntlmssp->ntlmssp_state,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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NTSTATUS gensec_ntlmssp_seal_packet(struct gensec_security *gensec_security,
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TALLOC_CTX *sig_mem_ctx,
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uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_seal_packet(gensec_ntlmssp->ntlmssp_state,
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sig_mem_ctx,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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/*
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wrappers for the ntlmssp_*() functions
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*/
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NTSTATUS gensec_ntlmssp_unseal_packet(struct gensec_security *gensec_security,
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uint8_t *data, size_t length,
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const uint8_t *whole_pdu, size_t pdu_length,
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const DATA_BLOB *sig)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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NTSTATUS nt_status;
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nt_status = ntlmssp_unseal_packet(gensec_ntlmssp->ntlmssp_state,
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data, length,
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whole_pdu, pdu_length,
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sig);
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return nt_status;
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}
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size_t gensec_ntlmssp_sig_size(struct gensec_security *gensec_security, size_t data_size)
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{
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return NTLMSSP_SIG_SIZE;
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}
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NTSTATUS gensec_ntlmssp_wrap(struct gensec_security *gensec_security,
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TALLOC_CTX *out_mem_ctx,
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const DATA_BLOB *in,
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DATA_BLOB *out)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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return ntlmssp_wrap(gensec_ntlmssp->ntlmssp_state,
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out_mem_ctx,
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in, out);
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}
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NTSTATUS gensec_ntlmssp_unwrap(struct gensec_security *gensec_security,
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TALLOC_CTX *out_mem_ctx,
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const DATA_BLOB *in,
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DATA_BLOB *out)
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{
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struct gensec_ntlmssp_context *gensec_ntlmssp =
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talloc_get_type_abort(gensec_security->private_data,
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struct gensec_ntlmssp_context);
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return ntlmssp_unwrap(gensec_ntlmssp->ntlmssp_state,
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out_mem_ctx,
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in, out);
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}
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