summaryrefslogtreecommitdiffstats
path: root/netwerk/test/ReadNTLM.cpp
blob: 73c02923a76965aeb59fc8ce34176746db192f5e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>

#include "plbase64.h"
#include "nsStringAPI.h"
#include "prmem.h"

/*
 * ReadNTLM : reads NTLM messages.
 *
 * based on http://davenport.sourceforge.net/ntlm.html
 */

#define kNegotiateUnicode               0x00000001
#define kNegotiateOEM                   0x00000002
#define kRequestTarget                  0x00000004
#define kUnknown1                       0x00000008
#define kNegotiateSign                  0x00000010
#define kNegotiateSeal                  0x00000020
#define kNegotiateDatagramStyle         0x00000040
#define kNegotiateLanManagerKey         0x00000080
#define kNegotiateNetware               0x00000100
#define kNegotiateNTLMKey               0x00000200
#define kUnknown2                       0x00000400
#define kUnknown3                       0x00000800
#define kNegotiateDomainSupplied        0x00001000
#define kNegotiateWorkstationSupplied   0x00002000
#define kNegotiateLocalCall             0x00004000
#define kNegotiateAlwaysSign            0x00008000
#define kTargetTypeDomain               0x00010000
#define kTargetTypeServer               0x00020000
#define kTargetTypeShare                0x00040000
#define kNegotiateNTLM2Key              0x00080000
#define kRequestInitResponse            0x00100000
#define kRequestAcceptResponse          0x00200000
#define kRequestNonNTSessionKey         0x00400000
#define kNegotiateTargetInfo            0x00800000
#define kUnknown4                       0x01000000
#define kUnknown5                       0x02000000
#define kUnknown6                       0x04000000
#define kUnknown7                       0x08000000
#define kUnknown8                       0x10000000
#define kNegotiate128                   0x20000000
#define kNegotiateKeyExchange           0x40000000
#define kNegotiate56                    0x80000000

static const char NTLM_SIGNATURE[] = "NTLMSSP";
static const char NTLM_TYPE1_MARKER[] = { 0x01, 0x00, 0x00, 0x00 };
static const char NTLM_TYPE2_MARKER[] = { 0x02, 0x00, 0x00, 0x00 };
static const char NTLM_TYPE3_MARKER[] = { 0x03, 0x00, 0x00, 0x00 };

#define NTLM_MARKER_LEN 4
#define NTLM_TYPE1_HEADER_LEN 32
#define NTLM_TYPE2_HEADER_LEN 32
#define NTLM_TYPE3_HEADER_LEN 64

#define LM_HASH_LEN 16
#define LM_RESP_LEN 24

#define NTLM_HASH_LEN 16
#define NTLM_RESP_LEN 24

static void PrintFlags(uint32_t flags)
{
#define TEST(_flag) \
  if (flags & k ## _flag) \
    printf("    0x%08x (" # _flag ")\n", k ## _flag)

  TEST(NegotiateUnicode);
  TEST(NegotiateOEM);
  TEST(RequestTarget);
  TEST(Unknown1);
  TEST(NegotiateSign);
  TEST(NegotiateSeal);
  TEST(NegotiateDatagramStyle);
  TEST(NegotiateLanManagerKey);
  TEST(NegotiateNetware);
  TEST(NegotiateNTLMKey);
  TEST(Unknown2);
  TEST(Unknown3);
  TEST(NegotiateDomainSupplied);
  TEST(NegotiateWorkstationSupplied);
  TEST(NegotiateLocalCall);
  TEST(NegotiateAlwaysSign);
  TEST(TargetTypeDomain);
  TEST(TargetTypeServer);
  TEST(TargetTypeShare);
  TEST(NegotiateNTLM2Key);
  TEST(RequestInitResponse);
  TEST(RequestAcceptResponse);
  TEST(RequestNonNTSessionKey);
  TEST(NegotiateTargetInfo);
  TEST(Unknown4);
  TEST(Unknown5);
  TEST(Unknown6);
  TEST(Unknown7);
  TEST(Unknown8);
  TEST(Negotiate128);
  TEST(NegotiateKeyExchange);
  TEST(Negotiate56);

#undef TEST
}

static void
PrintBuf(const char *tag, const uint8_t *buf, uint32_t bufLen)
{
  int i;

  printf("%s =\n", tag);
  while (bufLen > 0)
  {
    int count = bufLen;
    if (count > 8)
      count = 8;

    printf("    ");
    for (i=0; i<count; ++i)
    {
      printf("0x%02x ", int(buf[i]));
    }
    for (; i<8; ++i)
    {
      printf("     ");
    }

    printf("   ");
    for (i=0; i<count; ++i)
    {
      if (isprint(buf[i]))
        printf("%c", buf[i]);
      else
        printf(".");
    }
    printf("\n");

    bufLen -= count;
    buf += count;
  }
}

static uint16_t
ReadUint16(const uint8_t *&buf)
{
  uint16_t x;
#ifdef IS_BIG_ENDIAN
  x = ((uint16_t) buf[1]) | ((uint16_t) buf[0] << 8);
#else
  x = ((uint16_t) buf[0]) | ((uint16_t) buf[1] << 8);
#endif
  buf += sizeof(x);
  return x;
}

static uint32_t
ReadUint32(const uint8_t *&buf)
{
  uint32_t x;
#ifdef IS_BIG_ENDIAN
  x = ( (uint32_t) buf[3])        |
      (((uint32_t) buf[2]) << 8)  |
      (((uint32_t) buf[1]) << 16) |
      (((uint32_t) buf[0]) << 24);
#else
  x = ( (uint32_t) buf[0])        |
      (((uint32_t) buf[1]) << 8)  |
      (((uint32_t) buf[2]) << 16) |
      (((uint32_t) buf[3]) << 24);
#endif
  buf += sizeof(x);
  return x;
}

typedef struct {
  uint16_t length;
  uint16_t capacity;
  uint32_t offset;
} SecBuf;

static void
ReadSecBuf(SecBuf *s, const uint8_t *&buf)
{
  s->length = ReadUint16(buf);
  s->capacity = ReadUint16(buf);
  s->offset = ReadUint32(buf);
}

static void
ReadType1MsgBody(const uint8_t *inBuf, uint32_t start)
{
  const uint8_t *cursor = inBuf + start;
  uint32_t flags;

  PrintBuf("flags", cursor, 4);
  // read flags
  flags = ReadUint32(cursor);
  PrintFlags(flags);

  // type 1 message may not include trailing security buffers
  if ((flags & kNegotiateDomainSupplied) | 
      (flags & kNegotiateWorkstationSupplied))
  {
    SecBuf secbuf;
    ReadSecBuf(&secbuf, cursor);
    PrintBuf("supplied domain", inBuf + secbuf.offset, secbuf.length);

    ReadSecBuf(&secbuf, cursor);
    PrintBuf("supplied workstation", inBuf + secbuf.offset, secbuf.length);
  }
}

static void
ReadType2MsgBody(const uint8_t *inBuf, uint32_t start)
{
  uint16_t targetLen, offset;
  uint32_t flags;
  const uint8_t *target;
  const uint8_t *cursor = inBuf + start;

  // read target name security buffer
  targetLen = ReadUint16(cursor);
  ReadUint16(cursor); // discard next 16-bit value
  offset = ReadUint32(cursor); // get offset from inBuf
  target = inBuf + offset;

  PrintBuf("target", target, targetLen);

  PrintBuf("flags", cursor, 4);
  // read flags
  flags = ReadUint32(cursor);
  PrintFlags(flags);

  // read challenge
  PrintBuf("challenge", cursor, 8);
  cursor += 8;

  PrintBuf("context", cursor, 8);
  cursor += 8;

  SecBuf secbuf;
  ReadSecBuf(&secbuf, cursor);
  PrintBuf("target information", inBuf + secbuf.offset, secbuf.length);
}

static void
ReadType3MsgBody(const uint8_t *inBuf, uint32_t start)
{
  const uint8_t *cursor = inBuf + start;

  SecBuf secbuf;

  ReadSecBuf(&secbuf, cursor); // LM response
  PrintBuf("LM response", inBuf + secbuf.offset, secbuf.length);

  ReadSecBuf(&secbuf, cursor); // NTLM response
  PrintBuf("NTLM response", inBuf + secbuf.offset, secbuf.length);

  ReadSecBuf(&secbuf, cursor); // domain name
  PrintBuf("domain name", inBuf + secbuf.offset, secbuf.length);

  ReadSecBuf(&secbuf, cursor); // user name
  PrintBuf("user name", inBuf + secbuf.offset, secbuf.length);

  ReadSecBuf(&secbuf, cursor); // workstation name
  PrintBuf("workstation name", inBuf + secbuf.offset, secbuf.length);

  ReadSecBuf(&secbuf, cursor); // session key
  PrintBuf("session key", inBuf + secbuf.offset, secbuf.length);

  uint32_t flags = ReadUint32(cursor);
  PrintBuf("flags", (const uint8_t *) &flags, sizeof(flags));
  PrintFlags(flags);
}

static void
ReadMsg(const char *base64buf, uint32_t bufLen)
{
  uint8_t *inBuf = (uint8_t *) PL_Base64Decode(base64buf, bufLen, nullptr);
  if (!inBuf)
  {
    printf("PL_Base64Decode failed\n");
    return;
  }

  const uint8_t *cursor = inBuf;

  PrintBuf("signature", cursor, 8);

  // verify NTLMSSP signature
  if (memcmp(cursor, NTLM_SIGNATURE, sizeof(NTLM_SIGNATURE)) != 0)
  {
    printf("### invalid or corrupt NTLM signature\n");
  }
  cursor += sizeof(NTLM_SIGNATURE);

  PrintBuf("message type", cursor, 4);

  if (memcmp(cursor, NTLM_TYPE1_MARKER, sizeof(NTLM_MARKER_LEN)) == 0)
    ReadType1MsgBody(inBuf, 12);
  else if (memcmp(cursor, NTLM_TYPE2_MARKER, sizeof(NTLM_MARKER_LEN)) == 0)
    ReadType2MsgBody(inBuf, 12);
  else if (memcmp(cursor, NTLM_TYPE3_MARKER, sizeof(NTLM_MARKER_LEN)) == 0)
    ReadType3MsgBody(inBuf, 12);
  else
    printf("### invalid or unknown message type\n"); 

  PR_Free(inBuf);
}

int main(int argc, char **argv)
{
  if (argc == 1)
  {
    printf("usage: ntlmread <msg>\n");
    return -1;
  }
  ReadMsg(argv[1], (uint32_t) strlen(argv[1]));
  return 0;
}