wmi-1.3.16 from opsview.com
This commit is contained in:
Are Casilla
@@ -0,0 +1,368 @@
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/*
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Unix SMB/Netbios implementation.
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Version 3.0
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handle NLTMSSP, client server side parsing
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Copyright (C) Andrew Tridgell 2001
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Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
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Copyright (C) Stefan Metzmacher 2005
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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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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/ntlmssp/msrpc_parse.h"
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#include "lib/crypto/crypto.h"
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#include "libcli/auth/libcli_auth.h"
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#include "auth/credentials/credentials.h"
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#include "auth/gensec/gensec.h"
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/*********************************************************************
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Client side NTLMSSP
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*********************************************************************/
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/**
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* Next state function for the Initial packet
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*
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* @param ntlmssp_state NTLMSSP State
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* @param out_mem_ctx The DATA_BLOB *out will be allocated on this context
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* @param in A NULL data blob (input ignored)
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* @param out The initial negotiate request to the server, as an talloc()ed DATA_BLOB, on out_mem_ctx
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* @return Errors or NT_STATUS_OK.
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*/
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NTSTATUS ntlmssp_client_initial(struct gensec_security *gensec_security,
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TALLOC_CTX *out_mem_ctx,
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DATA_BLOB in, DATA_BLOB *out)
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{
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struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
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if (gensec_ntlmssp_state->unicode) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
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} else {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
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}
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if (gensec_ntlmssp_state->use_ntlmv2) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
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}
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/* generate the ntlmssp negotiate packet */
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msrpc_gen(out_mem_ctx,
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out, "CddAA",
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"NTLMSSP",
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NTLMSSP_NEGOTIATE,
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gensec_ntlmssp_state->neg_flags,
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gensec_ntlmssp_state->get_domain(),
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cli_credentials_get_workstation(gensec_security->credentials));
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gensec_ntlmssp_state->expected_state = NTLMSSP_CHALLENGE;
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return NT_STATUS_MORE_PROCESSING_REQUIRED;
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}
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/**
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* Next state function for the Challenge Packet. Generate an auth packet.
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*
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* @param gensec_security GENSEC state
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* @param out_mem_ctx Memory context for *out
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* @param in The server challnege, as a DATA_BLOB. reply.data must be NULL
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* @param out The next request (auth packet) to the server, as an allocated DATA_BLOB, on the out_mem_ctx context
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* @return Errors or NT_STATUS_OK.
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*/
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NTSTATUS ntlmssp_client_challenge(struct gensec_security *gensec_security,
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TALLOC_CTX *out_mem_ctx,
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const DATA_BLOB in, DATA_BLOB *out)
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{
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struct gensec_ntlmssp_state *gensec_ntlmssp_state = gensec_security->private_data;
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uint32_t chal_flags, ntlmssp_command, unkn1, unkn2;
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DATA_BLOB server_domain_blob;
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DATA_BLOB challenge_blob;
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DATA_BLOB target_info = data_blob(NULL, 0);
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char *server_domain;
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const char *chal_parse_string;
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const char *auth_gen_string;
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DATA_BLOB lm_response = data_blob(NULL, 0);
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DATA_BLOB nt_response = data_blob(NULL, 0);
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DATA_BLOB session_key = data_blob(NULL, 0);
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DATA_BLOB lm_session_key = data_blob(NULL, 0);
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DATA_BLOB encrypted_session_key = data_blob(NULL, 0);
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NTSTATUS nt_status;
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int flags = 0;
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const char *user, *domain;
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TALLOC_CTX *mem_ctx = talloc_new(out_mem_ctx);
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if (!mem_ctx) {
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return NT_STATUS_NO_MEMORY;
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}
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if (!msrpc_parse(mem_ctx,
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&in, "CdBd",
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"NTLMSSP",
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&ntlmssp_command,
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&server_domain_blob,
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&chal_flags)) {
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DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#1)\n"));
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dump_data(2, in.data, in.length);
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talloc_free(mem_ctx);
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return NT_STATUS_INVALID_PARAMETER;
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}
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data_blob_free(&server_domain_blob);
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DEBUG(3, ("Got challenge flags:\n"));
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debug_ntlmssp_flags(chal_flags);
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ntlmssp_handle_neg_flags(gensec_ntlmssp_state, chal_flags, gensec_ntlmssp_state->allow_lm_key);
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if (gensec_ntlmssp_state->unicode) {
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if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
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chal_parse_string = "CdUdbddB";
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} else {
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chal_parse_string = "CdUdbdd";
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}
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auth_gen_string = "CdBBUUUBd";
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} else {
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if (chal_flags & NTLMSSP_CHAL_TARGET_INFO) {
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chal_parse_string = "CdAdbddB";
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} else {
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chal_parse_string = "CdAdbdd";
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}
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auth_gen_string = "CdBBAAABd";
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}
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if (!msrpc_parse(mem_ctx,
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&in, chal_parse_string,
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"NTLMSSP",
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&ntlmssp_command,
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&server_domain,
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&chal_flags,
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&challenge_blob, 8,
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&unkn1, &unkn2,
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&target_info)) {
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DEBUG(1, ("Failed to parse the NTLMSSP Challenge: (#2)\n"));
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dump_data(2, in.data, in.length);
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talloc_free(mem_ctx);
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return NT_STATUS_INVALID_PARAMETER;
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}
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gensec_ntlmssp_state->server_domain = server_domain;
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if (challenge_blob.length != 8) {
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talloc_free(mem_ctx);
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return NT_STATUS_INVALID_PARAMETER;
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}
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cli_credentials_get_ntlm_username_domain(gensec_security->credentials, mem_ctx,
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&user, &domain);
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if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_NTLM2) {
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flags |= CLI_CRED_NTLM2;
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}
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if (gensec_ntlmssp_state->use_ntlmv2) {
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flags |= CLI_CRED_NTLMv2_AUTH;
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}
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if (gensec_ntlmssp_state->use_nt_response) {
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flags |= CLI_CRED_NTLM_AUTH;
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}
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if (lp_client_lanman_auth()) {
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flags |= CLI_CRED_LANMAN_AUTH;
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}
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nt_status = cli_credentials_get_ntlm_response(gensec_security->credentials, mem_ctx,
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&flags, challenge_blob, target_info,
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&lm_response, &nt_response,
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&lm_session_key, &session_key);
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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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if (!(flags & CLI_CRED_LANMAN_AUTH)) {
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/* LM Key is still possible, just silly. Fortunetly
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* we require command line options to end up here */
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/* gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY; */
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}
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if (!(flags & CLI_CRED_NTLM2)) {
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/* NTLM2 is incompatible... */
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gensec_ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
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}
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if ((gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
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&& lp_client_lanman_auth() && lm_session_key.length == 16) {
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DATA_BLOB new_session_key = data_blob_talloc(mem_ctx, NULL, 16);
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if (lm_response.length == 24) {
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SMBsesskeygen_lm_sess_key(lm_session_key.data, lm_response.data,
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new_session_key.data);
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} else {
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static const uint8_t zeros[24];
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SMBsesskeygen_lm_sess_key(lm_session_key.data, zeros,
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new_session_key.data);
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}
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session_key = new_session_key;
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dump_data_pw("LM session key\n", session_key.data, session_key.length);
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}
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/* Key exchange encryptes a new client-generated session key with
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the password-derived key */
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if (gensec_ntlmssp_state->neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH) {
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/* Make up a new session key */
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uint8_t client_session_key[16];
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generate_random_buffer(client_session_key, sizeof(client_session_key));
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/* Encrypt the new session key with the old one */
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encrypted_session_key = data_blob_talloc(gensec_ntlmssp_state,
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client_session_key, sizeof(client_session_key));
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dump_data_pw("KEY_EXCH session key:\n", encrypted_session_key.data, encrypted_session_key.length);
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arcfour_crypt(encrypted_session_key.data, session_key.data, encrypted_session_key.length);
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dump_data_pw("KEY_EXCH session key (enc):\n", encrypted_session_key.data, encrypted_session_key.length);
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/* Mark the new session key as the 'real' session key */
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session_key = data_blob_talloc(mem_ctx, client_session_key, sizeof(client_session_key));
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}
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DEBUG(3, ("NTLMSSP: Set final flags:\n"));
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debug_ntlmssp_flags(gensec_ntlmssp_state->neg_flags);
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/* this generates the actual auth packet */
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if (!msrpc_gen(mem_ctx,
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out, auth_gen_string,
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"NTLMSSP",
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NTLMSSP_AUTH,
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lm_response.data, lm_response.length,
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nt_response.data, nt_response.length,
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domain,
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user,
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cli_credentials_get_workstation(gensec_security->credentials),
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encrypted_session_key.data, encrypted_session_key.length,
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gensec_ntlmssp_state->neg_flags)) {
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talloc_free(mem_ctx);
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return NT_STATUS_NO_MEMORY;
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}
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gensec_ntlmssp_state->session_key = session_key;
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talloc_steal(gensec_ntlmssp_state, session_key.data);
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talloc_steal(out_mem_ctx, out->data);
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gensec_ntlmssp_state->chal = challenge_blob;
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gensec_ntlmssp_state->lm_resp = lm_response;
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talloc_steal(gensec_ntlmssp_state->lm_resp.data, lm_response.data);
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gensec_ntlmssp_state->nt_resp = nt_response;
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talloc_steal(gensec_ntlmssp_state->nt_resp.data, nt_response.data);
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gensec_ntlmssp_state->expected_state = NTLMSSP_DONE;
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if (gensec_security->want_features & (GENSEC_FEATURE_SIGN|GENSEC_FEATURE_SEAL)) {
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nt_status = ntlmssp_sign_init(gensec_ntlmssp_state);
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if (!NT_STATUS_IS_OK(nt_status)) {
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DEBUG(1, ("Could not setup NTLMSSP signing/sealing system (error was: %s)\n",
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nt_errstr(nt_status)));
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talloc_free(mem_ctx);
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return nt_status;
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}
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}
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talloc_free(mem_ctx);
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return NT_STATUS_OK;
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}
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NTSTATUS gensec_ntlmssp_client_start(struct gensec_security *gensec_security)
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{
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struct gensec_ntlmssp_state *gensec_ntlmssp_state;
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NTSTATUS nt_status;
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nt_status = gensec_ntlmssp_start(gensec_security);
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NT_STATUS_NOT_OK_RETURN(nt_status);
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gensec_ntlmssp_state = gensec_security->private_data;
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gensec_ntlmssp_state->role = NTLMSSP_CLIENT;
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gensec_ntlmssp_state->get_domain = lp_workgroup;
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gensec_ntlmssp_state->unicode = lp_parm_bool(-1, "ntlmssp_client", "unicode", True);
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gensec_ntlmssp_state->use_nt_response = lp_parm_bool(-1, "ntlmssp_client", "send_nt_reponse", True);
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gensec_ntlmssp_state->allow_lm_key = (lp_client_lanman_auth()
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&& (lp_parm_bool(-1, "ntlmssp_client", "allow_lm_key", False)
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|| lp_parm_bool(-1, "ntlmssp_client", "lm_key", False)));
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gensec_ntlmssp_state->use_ntlmv2 = lp_client_ntlmv2_auth();
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gensec_ntlmssp_state->expected_state = NTLMSSP_INITIAL;
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gensec_ntlmssp_state->neg_flags =
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NTLMSSP_NEGOTIATE_NTLM |
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NTLMSSP_REQUEST_TARGET;
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if (lp_parm_bool(-1, "ntlmssp_client", "128bit", True)) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_128;
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}
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if (lp_parm_bool(-1, "ntlmssp_client", "56bit", False)) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_56;
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}
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if (lp_parm_bool(-1, "ntlmssp_client", "lm_key", False)) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
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}
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if (lp_parm_bool(-1, "ntlmssp_client", "keyexchange", True)) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_KEY_EXCH;
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}
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if (lp_parm_bool(-1, "ntlmssp_client", "alwayssign", True)) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
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}
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if (lp_parm_bool(-1, "ntlmssp_client", "ntlm2", True)) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_NTLM2;
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} else {
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/* apparently we can't do ntlmv2 if we don't do ntlm2 */
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gensec_ntlmssp_state->use_ntlmv2 = False;
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}
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if (gensec_security->want_features & GENSEC_FEATURE_SESSION_KEY) {
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/*
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* We need to set this to allow a later SetPassword
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* via the SAMR pipe to succeed. Strange.... We could
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* also add NTLMSSP_NEGOTIATE_SEAL here. JRA.
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*
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* Without this, Windows will not create the master key
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* that it thinks is only used for NTLMSSP signing and
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* sealing. (It is actually pulled out and used directly)
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*/
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
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}
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if (gensec_security->want_features & GENSEC_FEATURE_SIGN) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
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}
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if (gensec_security->want_features & GENSEC_FEATURE_SEAL) {
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gensec_ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_SEAL;
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}
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gensec_security->private_data = gensec_ntlmssp_state;
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return NT_STATUS_OK;
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}
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