auth/ntlmssp/ntlmssp_util.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 3.0
   4    handle NLTMSSP, server side
   5
   6    Copyright (C) Andrew Tridgell      2001
   7    Copyright (C) Andrew Bartlett 2001-2003
   8    Copyright (C) Andrew Bartlett 2005 (Updated from gensec).
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "../auth/ntlmssp/ntlmssp.h"
  26 #include "../auth/ntlmssp/ntlmssp_private.h"
  27
  28 /**
  29  * Print out the NTLMSSP flags for debugging
  30  * @param neg_flags The flags from the packet
  31  */
  32 void debug_ntlmssp_flags(uint32_t neg_flags)
  33 {
  34         DEBUG(3,("Got NTLMSSP neg_flags=0x%08x\n", neg_flags));
  35
  36         if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE)
  37                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_UNICODE\n"));
  38         if (neg_flags & NTLMSSP_NEGOTIATE_OEM)
  39                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_OEM\n"));
  40         if (neg_flags & NTLMSSP_REQUEST_TARGET)
  41                 DEBUGADD(4, ("  NTLMSSP_REQUEST_TARGET\n"));
  42         if (neg_flags & NTLMSSP_NEGOTIATE_SIGN)
  43                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_SIGN\n"));
  44         if (neg_flags & NTLMSSP_NEGOTIATE_SEAL)
  45                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_SEAL\n"));
  46         if (neg_flags & NTLMSSP_NEGOTIATE_DATAGRAM)
  47                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_DATAGRAM\n"));
  48         if (neg_flags & NTLMSSP_NEGOTIATE_LM_KEY)
  49                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_LM_KEY\n"));
  50         if (neg_flags & NTLMSSP_NEGOTIATE_NETWARE)
  51                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NETWARE\n"));
  52         if (neg_flags & NTLMSSP_NEGOTIATE_NTLM)
  53                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NTLM\n"));
  54         if (neg_flags & NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED)
  55                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_OEM_DOMAIN_SUPPLIED\n"));
  56         if (neg_flags & NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED)
  57                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_OEM_WORKSTATION_SUPPLIED\n"));
  58         if (neg_flags & NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL)
  59                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_THIS_IS_LOCAL_CALL\n"));
  60         if (neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)
  61                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_ALWAYS_SIGN\n"));
  62         if (neg_flags & NTLMSSP_REQUEST_NON_NT_SESSION_KEY)
  63                 DEBUGADD(4, ("  NTLMSSP_REQUEST_NON_NT_SESSION_KEY\n"));
  64         if (neg_flags & NTLMSSP_NEGOTIATE_NTLM2)
  65                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_NTLM2\n"));
  66         if (neg_flags & NTLMSSP_NEGOTIATE_TARGET_INFO)
  67                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_TARGET_INFO\n"));
  68         if (neg_flags & NTLMSSP_NEGOTIATE_VERSION)
  69                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_VERSION\n"));
  70         if (neg_flags & NTLMSSP_NEGOTIATE_128)
  71                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_128\n"));
  72         if (neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)
  73                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_KEY_EXCH\n"));
  74         if (neg_flags & NTLMSSP_NEGOTIATE_56)
  75                 DEBUGADD(4, ("  NTLMSSP_NEGOTIATE_56\n"));
  76 }
  77
  78 void ntlmssp_handle_neg_flags(struct ntlmssp_state *ntlmssp_state,
  79                               uint32_t neg_flags, bool allow_lm)
  80 {
  81         if (neg_flags & NTLMSSP_NEGOTIATE_UNICODE) {
  82                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_UNICODE;
  83                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_OEM;
  84                 ntlmssp_state->unicode = true;
  85         } else {
  86                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_UNICODE;
  87                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_OEM;
  88                 ntlmssp_state->unicode = false;
  89         }
  90
  91         if ((neg_flags & NTLMSSP_NEGOTIATE_LM_KEY) && allow_lm) {
  92                 /* other end forcing us to use LM */
  93                 ntlmssp_state->neg_flags |= NTLMSSP_NEGOTIATE_LM_KEY;
  94                 ntlmssp_state->use_ntlmv2 = false;
  95         } else {
  96                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_LM_KEY;
  97         }
  98
  99         if (!(neg_flags & NTLMSSP_NEGOTIATE_ALWAYS_SIGN)) {
 100                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_ALWAYS_SIGN;
 101         }
 102
 103         if (!(neg_flags & NTLMSSP_NEGOTIATE_NTLM2)) {
 104                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_NTLM2;
 105         }
 106
 107         if (!(neg_flags & NTLMSSP_NEGOTIATE_128)) {
 108                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_128;
 109         }
 110
 111         if (!(neg_flags & NTLMSSP_NEGOTIATE_56)) {
 112                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_56;
 113         }
 114
 115         if (!(neg_flags & NTLMSSP_NEGOTIATE_KEY_EXCH)) {
 116                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_KEY_EXCH;
 117         }
 118
 119         if (!(neg_flags & NTLMSSP_NEGOTIATE_SIGN)) {
 120                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SIGN;
 121         }
 122
 123         if (!(neg_flags & NTLMSSP_NEGOTIATE_SEAL)) {
 124                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_SEAL;
 125         }
 126
 127         if (!(neg_flags & NTLMSSP_NEGOTIATE_VERSION)) {
 128                 ntlmssp_state->neg_flags &= ~NTLMSSP_NEGOTIATE_VERSION;
 129         }
 130
 131         if ((neg_flags & NTLMSSP_REQUEST_TARGET)) {
 132                 ntlmssp_state->neg_flags |= NTLMSSP_REQUEST_TARGET;
 133         }
 134 }
 135
 136 /* Does this blob looks like it could be NTLMSSP? */
 137 bool ntlmssp_blob_matches_magic(const DATA_BLOB *blob)
 138 {
 139         if (blob->length > 8 && memcmp("NTLMSSP\0", blob->data, 8) == 0) {
 140                 return true;
 141         } else {
 142                 return false;
 143         }
 144 }