dlls/secur32/util.c

   1 /*
   2  * Copyright 2006 Kai Blin
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  17  *
  18  * This file contains various helper functions needed for NTLM and maybe others
  19  */
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22 #include "windef.h"
  23 #include "winbase.h"
  24 #include "rpc.h"
  25 #include "sspi.h"
  26 #include "secur32_priv.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(ntlm);
  30
  31 /* The CRC32 code is copyright (C) 1986 Gary S. Brown and was placed in the
  32  * public domain.
  33  * CRC polynomial 0xedb88320
  34  */
  35 static const ULONG CRC_table[256] =
  36 {
  37     0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
  38     0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  39     0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
  40     0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  41     0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
  42     0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  43     0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
  44     0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  45     0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
  46     0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  47     0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
  48     0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  49     0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
  50     0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  51     0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
  52     0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  53     0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
  54     0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  55     0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
  56     0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  57     0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
  58     0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  59     0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
  60     0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  61     0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
  62     0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  63     0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
  64     0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  65     0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
  66     0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  67     0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
  68     0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  69     0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
  70     0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  71     0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
  72     0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  73     0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
  74     0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  75     0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
  76     0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
  77     0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
  78     0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
  79     0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d
  80 };
  81
  82 static const char client_to_server_sign_constant[] = "session key to client-to-server signing key magic constant";
  83 static const char client_to_server_seal_constant[] = "session key to client-to-server sealing key magic constant";
  84 static const char server_to_client_sign_constant[] = "session key to server-to-client signing key magic constant";
  85 static const char server_to_client_seal_constant[] = "session key to server-to-client sealing key magic constant";
  86
  87 typedef struct
  88 {
  89     unsigned int buf[4];
  90     unsigned int i[2];
  91     unsigned char in[64];
  92     unsigned char digest[16];
  93 } MD4_CTX;
  94
  95 /* And now the same with a different memory layout. */
  96 typedef struct
  97 {
  98     unsigned int i[2];
  99     unsigned int buf[4];
 100     unsigned char in[64];
 101     unsigned char digest[16];
 102 } MD5_CTX;
 103
 104 VOID WINAPI MD4Init( MD4_CTX *ctx );
 105 VOID WINAPI MD4Update( MD4_CTX *ctx, const unsigned char *buf, unsigned int len );
 106 VOID WINAPI MD4Final( MD4_CTX *ctx );
 107 VOID WINAPI MD5Init( MD5_CTX *ctx );
 108 VOID WINAPI MD5Update( MD5_CTX *ctx, const unsigned char *buf, unsigned int len );
 109 VOID WINAPI MD5Final( MD5_CTX *ctx );
 110
 111 ULONG ComputeCrc32(const BYTE *pData, INT iLen, ULONG initial_crc)
 112 {
 113   ULONG crc = ~initial_crc;
 114
 115   while (iLen > 0)
 116   {
 117     crc = CRC_table[(crc ^ *pData) & 0xff] ^ (crc >> 8);
 118     pData++;
 119     iLen--;
 120   }
 121   return ~crc;
 122 }
 123
 124 SECURITY_STATUS SECUR32_CreateNTLMv1SessionKey(PBYTE password, int len, PBYTE session_key)
 125 {
 126     MD4_CTX ctx;
 127     BYTE ntlm_hash[16];
 128
 129     TRACE("(%p, %p)\n", password, session_key);
 130
 131     MD4Init(&ctx);
 132     MD4Update(&ctx, password, len);
 133     MD4Final(&ctx);
 134
 135     memcpy(ntlm_hash, ctx.digest, 0x10);
 136
 137     MD4Init(&ctx);
 138     MD4Update(&ctx, ntlm_hash, 0x10u);
 139     MD4Final(&ctx);
 140
 141     memcpy(session_key, ctx.digest, 0x10);
 142
 143     return SEC_E_OK;
 144 }
 145
 146 static void SECUR32_CalcNTLMv2Subkey(const BYTE *session_key, const char *magic, PBYTE subkey)
 147 {
 148     MD5_CTX ctx;
 149
 150     MD5Init(&ctx);
 151     MD5Update(&ctx, session_key, 16);
 152     MD5Update(&ctx, (const unsigned char*)magic, lstrlenA(magic)+1);
 153     MD5Final(&ctx);
 154     memcpy(subkey, ctx.digest, 16);
 155 }
 156
 157 /* This assumes we do have a valid NTLM2 user session key */
 158 SECURITY_STATUS SECUR32_CreateNTLMv2SubKeys(PNegoHelper helper)
 159 {
 160     helper->crypt.ntlm2.send_sign_key = HeapAlloc(GetProcessHeap(), 0, 16);
 161     helper->crypt.ntlm2.send_seal_key = HeapAlloc(GetProcessHeap(), 0, 16);
 162     helper->crypt.ntlm2.recv_sign_key = HeapAlloc(GetProcessHeap(), 0, 16);
 163     helper->crypt.ntlm2.recv_seal_key = HeapAlloc(GetProcessHeap(), 0, 16);
 164
 165     if(helper->mode == NTLM_CLIENT)
 166     {
 167         SECUR32_CalcNTLMv2Subkey(helper->session_key, client_to_server_sign_constant,
 168                 helper->crypt.ntlm2.send_sign_key);
 169         SECUR32_CalcNTLMv2Subkey(helper->session_key, client_to_server_seal_constant,
 170                 helper->crypt.ntlm2.send_seal_key);
 171         SECUR32_CalcNTLMv2Subkey(helper->session_key, server_to_client_sign_constant,
 172                 helper->crypt.ntlm2.recv_sign_key);
 173         SECUR32_CalcNTLMv2Subkey(helper->session_key, server_to_client_seal_constant,
 174                 helper->crypt.ntlm2.recv_seal_key);
 175     }
 176     else
 177     {
 178         SECUR32_CalcNTLMv2Subkey(helper->session_key, server_to_client_sign_constant,
 179                 helper->crypt.ntlm2.send_sign_key);
 180         SECUR32_CalcNTLMv2Subkey(helper->session_key, server_to_client_seal_constant,
 181                 helper->crypt.ntlm2.send_seal_key);
 182         SECUR32_CalcNTLMv2Subkey(helper->session_key, client_to_server_sign_constant,
 183                 helper->crypt.ntlm2.recv_sign_key);
 184         SECUR32_CalcNTLMv2Subkey(helper->session_key, client_to_server_seal_constant,
 185                 helper->crypt.ntlm2.recv_seal_key);
 186     }
 187
 188     return SEC_E_OK;
 189 }
 190
 191 arc4_info *SECUR32_arc4Alloc(void)
 192 {
 193     arc4_info *a4i = HeapAlloc(GetProcessHeap(), 0, sizeof(arc4_info));
 194     return a4i;
 195 }
 196
 197 /*
 198  * The arc4 code is based on dlls/advapi32/crypt_arc4.c by Mike McCormack,
 199  * which in turn is based on public domain code by Wei Dai
 200  */
 201 void SECUR32_arc4Init(arc4_info *a4i, const BYTE *key, unsigned int keyLen)
 202 {
 203     unsigned int keyIndex = 0, stateIndex = 0;
 204     unsigned int i, a;
 205
 206     TRACE("(%p, %p, %d)\n", a4i, key, keyLen);
 207
 208         a4i->x = a4i->y = 0;
 209
 210     for (i=0; i<256; i++)
 211         a4i->state[i] = i;
 212
 213     for (i=0; i<256; i++)
 214     {
 215         a = a4i->state[i];
 216         stateIndex += key[keyIndex] + a;
 217         stateIndex &= 0xff;
 218         a4i->state[i] = a4i->state[stateIndex];
 219         a4i->state[stateIndex] = a;
 220         if (++keyIndex >= keyLen)
 221             keyIndex = 0;
 222     }
 223
 224 }
 225
 226 void SECUR32_arc4Process(arc4_info *a4i, BYTE *inoutString, unsigned int length)
 227 {
 228     BYTE *const s=a4i->state;
 229     unsigned int x = a4i->x;
 230     unsigned int y = a4i->y;
 231     unsigned int a, b;
 232
 233     while(length--)
 234     {
 235         x = (x+1) & 0xff;
 236         a = s[x];
 237         y = (y+a) & 0xff;
 238         b = s[y];
 239         s[x] = b;
 240         s[y] = a;
 241         *inoutString++ ^= s[(a+b) & 0xff];
 242     }
 243
 244     a4i->x = x;
 245     a4i->y = y;
 246 }
 247
 248 void SECUR32_arc4Cleanup(arc4_info *a4i)
 249 {
 250     HeapFree(GetProcessHeap(), 0, a4i);
 251 }