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
|
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <ntlm.h>
#include "getargs.h"
int from64tobits(char *out, const char *in);
void to64frombits(unsigned char *out, const unsigned char *in, int inlen);
int dumpReq;
int dumpChal;
int dumpResp;
int genResp;
int dumpRaw;
int dumpb64only;
int genReq;
char *username = "joeuser";
char *password = "joespw";
argSpec argSpecArray[] =
{
{'q', OptionBoolean, &dumpReq, NULL, "dump NTLM request", NULL},
{'Q', OptionBoolean, &genReq, NULL, "generate (and dump) NTLM request", NULL},
{'c', OptionBoolean, &dumpChal, NULL, "dump NTLM challange", NULL},
{'g', OptionBoolean, &genResp, NULL, "generate (and dump) NTLM response given a challenge", NULL},
{'r', OptionBoolean, &dumpResp, NULL, "dump NTLM response", NULL},
{'R', OptionBoolean, &dumpRaw, NULL, "dump raw bytes", NULL},
{'6', OptionBoolean, &dumpb64only, NULL, "dump generated base64 only", NULL},
{'u', OptionString, &username, NULL, "username", NULL},
{'p', OptionString, &password, NULL, "password", NULL},
};
int argSpecCount = (sizeof argSpecArray / sizeof argSpecArray[0]);
char *progName;
void usage(void)
{
printf("usage: %s [options] [base-64-string]\n", progName);
printf(" %s -? will display options\n", progName);
}
unsigned char buf[4096];
unsigned char buf2[4096];
int main(int argc, char *argv[])
{
int rawLen = 0;
int argsUsed;
int i;
progName = argv[0];
argsUsed = getargs(argc, argv, argSpecArray, argSpecCount);
if (argsUsed < 0)
{
usage();
exit(1);
}
argc -= argsUsed;
argv += argsUsed;
if (argc != 1 && argc != 0)
{
usage();
exit(1);
}
if (argc == 1)
{
rawLen = from64tobits(buf,argv[0]);
if (genReq)
fprintf(stderr,"%s: extra argument with -Q ignored\n",progName);
}
else
{
if (dumpReq || dumpChal || dumpResp || dumpRaw)
{
fprintf(stderr,"%s: -q -r -c -R specified but no base64 data\n",progName);
return 1;
}
}
printf("Converted base64 string to %d data bytes\n",rawLen);
if (dumpReq)
dumpSmbNtlmAuthRequest(stdout,(tSmbNtlmAuthRequest*)buf);
else if (dumpChal)
dumpSmbNtlmAuthChallenge(stdout,(tSmbNtlmAuthChallenge*)buf);
else if (dumpResp)
dumpSmbNtlmAuthResponse(stdout,(tSmbNtlmAuthResponse*)buf);
if (dumpRaw)
for (i=0; i<rawLen; ++i)
printf("%3d: %02x\n",i,buf[i]);
if (genReq)
{
buildSmbNtlmAuthRequest((tSmbNtlmAuthRequest*)buf2,username,NULL);
to64frombits(buf, buf2, SmbLength((tSmbNtlmAuthResponse*)buf2));
printf("%s\n",buf);
if (!dumpb64only)
dumpSmbNtlmAuthRequest(stdout,(tSmbNtlmAuthRequest*)buf2);
}
if (genResp)
{
buildSmbNtlmAuthResponse((tSmbNtlmAuthChallenge*)buf,
(tSmbNtlmAuthResponse*)buf2,
username,password);
to64frombits(buf, buf2, SmbLength((tSmbNtlmAuthResponse*)buf2));
printf("%s\n",buf);
if (!dumpb64only)
dumpSmbNtlmAuthResponse(stdout,(tSmbNtlmAuthResponse*)buf2);
}
return 0;
}
/*
* base64.c -- base-64 conversion routines.
*
* For license terms, see the file COPYING in this directory.
*
* This base 64 encoding is defined in RFC2045 section 6.8,
* "Base64 Content-Transfer-Encoding", but lines must not be broken in the
* scheme used here.
*/
/*
* This code borrowed from fetchmail sources
*/
static const char base64digits[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
#define BAD -1
static const char base64val[] = {
BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD,
BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD,
BAD,BAD,BAD,BAD, BAD,BAD,BAD,BAD, BAD,BAD,BAD, 62, BAD,BAD,BAD, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61,BAD,BAD, BAD,BAD,BAD,BAD,
BAD, 0, 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,BAD, BAD,BAD,BAD,BAD,
BAD, 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,BAD, BAD,BAD,BAD,BAD
};
#define DECODE64(c) (isascii(c) ? base64val[c] : BAD)
void to64frombits(unsigned char *out, const unsigned char *in, int inlen)
/* raw bytes in quasi-big-endian order to base 64 string (NUL-terminated) */
{
for (; inlen >= 3; inlen -= 3)
{
*out++ = base64digits[in[0] >> 2];
*out++ = base64digits[((in[0] << 4) & 0x30) | (in[1] >> 4)];
*out++ = base64digits[((in[1] << 2) & 0x3c) | (in[2] >> 6)];
*out++ = base64digits[in[2] & 0x3f];
in += 3;
}
if (inlen > 0)
{
unsigned char fragment;
*out++ = base64digits[in[0] >> 2];
fragment = (in[0] << 4) & 0x30;
if (inlen > 1)
fragment |= in[1] >> 4;
*out++ = base64digits[fragment];
*out++ = (inlen < 2) ? '=' : base64digits[(in[1] << 2) & 0x3c];
*out++ = '=';
}
*out = '\0';
}
int from64tobits(char *out, const char *in)
/* base 64 to raw bytes in quasi-big-endian order, returning count of bytes */
{
int len = 0;
register unsigned char digit1, digit2, digit3, digit4;
if (in[0] == '+' && in[1] == ' ')
in += 2;
if (*in == '\r')
return(0);
do {
digit1 = in[0];
if (DECODE64(digit1) == BAD)
return(-1);
digit2 = in[1];
if (DECODE64(digit2) == BAD)
return(-1);
digit3 = in[2];
if (digit3 != '=' && DECODE64(digit3) == BAD)
return(-1);
digit4 = in[3];
if (digit4 != '=' && DECODE64(digit4) == BAD)
return(-1);
in += 4;
*out++ = (DECODE64(digit1) << 2) | (DECODE64(digit2) >> 4);
++len;
if (digit3 != '=')
{
*out++ = ((DECODE64(digit2) << 4) & 0xf0) | (DECODE64(digit3) >> 2);
++len;
if (digit4 != '=')
{
*out++ = ((DECODE64(digit3) << 6) & 0xc0) | DECODE64(digit4);
++len;
}
}
} while
(*in && *in != '\r' && digit4 != '=');
return (len);
}
/* base64.c ends here */
|
