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/*
Unix SMB/Netbios implementation.
Version 3.0
handle NLTMSSP, server side
Copyright (C) Andrew Tridgell 2001
Copyright (C) Andrew Bartlett 2001-2003
Copyright (C) Andrew Bartlett 2005 (Updated from gensec).
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 "../auth/ntlmssp/ntlmssp.h"
#include "../auth/ntlmssp/ntlmssp_private.h"
static void debug_ntlmssp_flags_raw(int level, uint32_t flags)
{
#define _PRINT_FLAG_LINE(v) do { \
if (flags & (v)) { \
DEBUGADD(level, (" " #v "\n")); \
} \
} while (0)
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_UNICODE);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_OEM);
_PRINT_FLAG_LINE(NTLMSSP_REQUEST_TARGET);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_SIGN);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_SEAL);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_DATAGRAM);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_LM_KEY);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_NETWARE);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_NTLM);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_NT_ONLY);
_PRINT_FLAG_LINE(NTLMSSP_ANONYMOUS);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_ALWAYS_SIGN);
_PRINT_FLAG_LINE(NTLMSSP_TARGET_TYPE_DOMAIN);
_PRINT_FLAG_LINE(NTLMSSP_TARGET_TYPE_SERVER);
_PRINT_FLAG_LINE(NTLMSSP_TARGET_TYPE_SHARE);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_EXTENDED_SESSIONSECURITY);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_IDENTIFY);
_PRINT_FLAG_LINE(NTLMSSP_REQUEST_NON_NT_SESSION_KEY);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_TARGET_INFO);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_VERSION);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_128);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_KEY_EXCH);
_PRINT_FLAG_LINE(NTLMSSP_NEGOTIATE_56);
}
/**
* Print out the NTLMSSP flags for debugging
* @param neg_flags The flags from the packet
*/
void debug_ntlmssp_flags(uint32_t neg_flags)
{
DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
debug_ntlmssp_flags_raw(4, neg_flags);
}
void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
uint32_t neg_flags, bool allow_lm)
{
if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
ntlmssp_state->unicode = true;
} else {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
ntlmssp_state->unicode = false;
}
if ((neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) && allow_lm) {
/* other end forcing us to use LM */
ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
ntlmssp_state->use_ntlmv2 = false;
} else {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_56)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_56;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_SEAL)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SEAL;
}
if (!(neg_flags & NTLMSSP_NEGOTIATE_VERSION)) {
ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_VERSION;
}
if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
}
}
/* Does this blob looks like it could be NTLMSSP? */
bool ntlmssp_blob_matches_magic(const DATA_BLOB *blob)
{
if (blob->length > 8 && memcmp("NTLMSSP\0", blob->data, 8) == 0) {
return true;
} else {
return false;
}
}
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