1 #include <stdlib.h>
2 #include <string.h>
3 #include <stdio.h>
4
5 extern long read(int, void*, long);
6 typedef unsigned char uchar;
7 typedef unsigned long ulong;
8 #define NAMELEN 28
9
10 /*********** auth.h ************/
11 typedef struct Ticket Ticket;
12 typedef struct Ticketreq Ticketreq;
13 typedef struct Authenticator Authenticator;
14 typedef struct Nvrsafe Nvrsafe;
15 typedef struct Passwordreq Passwordreq;
16 typedef struct Chalstate Chalstate;
17
18 enum
19 {
20 DOMLEN= 48, /* length of an authentication domain name */
21 DESKEYLEN= 7, /* length of a des key for encrypt/decrypt */
22 CHALLEN= 8, /* length of a challenge */
23 NETCHLEN= 16, /* max network challenge length */
24 CONFIGLEN= 14,
25
26 KEYDBLEN= NAMELEN+DESKEYLEN+4+2
27 };
28
29 /* encryption numberings (anti-replay) */
30 enum
31 {
32 AuthTreq=1, /* ticket request */
33 AuthChal=2, /* challenge box request */
34 AuthPass=3, /* change password */
35
36 AuthOK=4, /* reply follows */
37 AuthErr=5, /* error follows */
38
39 AuthTs=64, /* ticket encrypted with server's key */
40 AuthTc, /* ticket encrypted with client's key */
41 AuthAs, /* server generated authenticator */
42 AuthAc /* client generated authenticator */
43 };
44
45 struct Ticketreq
46 {
47 char type;
48 char authid[NAMELEN]; /* server's encryption id */
49 char authdom[DOMLEN]; /* server's authentication domain */
50 char chal[CHALLEN]; /* challenge from server */
51 char hostid[NAMELEN]; /* host's encryption id */
52 char uid[NAMELEN]; /* uid of requesting user on host */
53 };
54 #define TICKREQLEN (3*NAMELEN+CHALLEN+DOMLEN+1)
55
56 struct Ticket
57 {
58 char num; /* replay protection */
59 char chal[CHALLEN]; /* server challenge */
60 char cuid[NAMELEN]; /* uid on client */
61 char suid[NAMELEN]; /* uid on server */
62 char key[DESKEYLEN]; /* nonce DES key */
63 };
64 #define TICKETLEN (CHALLEN+2*NAMELEN+DESKEYLEN+1)
65
66 struct Authenticator
67 {
68 char num; /* replay protection */
69 char chal[CHALLEN];
70 ulong id; /* authenticator id, ++'d with each auth */
71 };
72 #define AUTHENTLEN (CHALLEN+4+1)
73
74 struct Passwordreq
75 {
76 char num;
77 char old[NAMELEN];
78 char new[NAMELEN];
79 };
80 #define PASSREQLEN (2*NAMELEN+1)
81
82 struct Nvrsafe
83 {
84 char machkey[DESKEYLEN];
85 uchar machsum;
86 char authkey[DESKEYLEN];
87 uchar authsum;
88 char config[CONFIGLEN];
89 uchar configsum;
90 char authid[NAMELEN];
91 uchar authidsum;
92 char authdom[DOMLEN];
93 uchar authdomsum;
94 };
95
96 struct Chalstate
97 {
98 int afd; /* /dev/authenticate */
99 int asfd; /* authdial() */
100 char chal[NETCHLEN]; /* challenge/response */
101 };
102
103
104 /************ crypt.c *************/
105 /*
106 * Data Encryption Standard
107 * D.P.Mitchell 83/06/08.
108 *
109 * block_cipher(key, block, decrypting)
110 */
111 static long ip_low(char [8]);
112 static long ip_high(char [8]);
113 static void fp(long, long, char[8]);
114 static void key_setup(char[DESKEYLEN], char[128]);
115 static void block_cipher(char[128], char[8], int);
116
117 /*
118 * destructively encrypt the buffer, which
119 * must be at least 8 characters long.
120 */
121 int
encrypt9(void * key,void * vbuf,int n)122 encrypt9(void *key, void *vbuf, int n)
123 {
124 char ekey[128], *buf;
125 int i, r;
126
127 if(n < 8)
128 return 0;
129 key_setup(key, ekey);
130 buf = vbuf;
131 n--;
132 r = n % 7;
133 n /= 7;
134 for(i = 0; i < n; i++){
135 block_cipher(ekey, buf, 0);
136 buf += 7;
137 }
138 if(r)
139 block_cipher(ekey, buf - 7 + r, 0);
140 return 1;
141 }
142
143 /*
144 * destructively decrypt the buffer, which
145 * must be at least 8 characters long.
146 */
147 int
decrypt(void * key,void * vbuf,int n)148 decrypt(void *key, void *vbuf, int n)
149 {
150 char ekey[128], *buf;
151 int i, r;
152
153 if(n < 8)
154 return 0;
155 key_setup(key, ekey);
156 buf = vbuf;
157 n--;
158 r = n % 7;
159 n /= 7;
160 buf += n * 7;
161 if(r)
162 block_cipher(ekey, buf - 7 + r, 1);
163 for(i = 0; i < n; i++){
164 buf -= 7;
165 block_cipher(ekey, buf, 1);
166 }
167 return 1;
168 }
169
170 /*
171 * Tables for Combined S and P Boxes
172 */
173
174 static long s0p[] = {
175 0x00410100,0x00010000,0x40400000,0x40410100,0x00400000,0x40010100,0x40010000,0x40400000,
176 0x40010100,0x00410100,0x00410000,0x40000100,0x40400100,0x00400000,0x00000000,0x40010000,
177 0x00010000,0x40000000,0x00400100,0x00010100,0x40410100,0x00410000,0x40000100,0x00400100,
178 0x40000000,0x00000100,0x00010100,0x40410000,0x00000100,0x40400100,0x40410000,0x00000000,
179 0x00000000,0x40410100,0x00400100,0x40010000,0x00410100,0x00010000,0x40000100,0x00400100,
180 0x40410000,0x00000100,0x00010100,0x40400000,0x40010100,0x40000000,0x40400000,0x00410000,
181 0x40410100,0x00010100,0x00410000,0x40400100,0x00400000,0x40000100,0x40010000,0x00000000,
182 0x00010000,0x00400000,0x40400100,0x00410100,0x40000000,0x40410000,0x00000100,0x40010100,
183 };
184
185 static long s1p[] = {
186 0x08021002,0x00000000,0x00021000,0x08020000,0x08000002,0x00001002,0x08001000,0x00021000,
187 0x00001000,0x08020002,0x00000002,0x08001000,0x00020002,0x08021000,0x08020000,0x00000002,
188 0x00020000,0x08001002,0x08020002,0x00001000,0x00021002,0x08000000,0x00000000,0x00020002,
189 0x08001002,0x00021002,0x08021000,0x08000002,0x08000000,0x00020000,0x00001002,0x08021002,
190 0x00020002,0x08021000,0x08001000,0x00021002,0x08021002,0x00020002,0x08000002,0x00000000,
191 0x08000000,0x00001002,0x00020000,0x08020002,0x00001000,0x08000000,0x00021002,0x08001002,
192 0x08021000,0x00001000,0x00000000,0x08000002,0x00000002,0x08021002,0x00021000,0x08020000,
193 0x08020002,0x00020000,0x00001002,0x08001000,0x08001002,0x00000002,0x08020000,0x00021000,
194 };
195
196 static long s2p[] = {
197 0x20800000,0x00808020,0x00000020,0x20800020,0x20008000,0x00800000,0x20800020,0x00008020,
198 0x00800020,0x00008000,0x00808000,0x20000000,0x20808020,0x20000020,0x20000000,0x20808000,
199 0x00000000,0x20008000,0x00808020,0x00000020,0x20000020,0x20808020,0x00008000,0x20800000,
200 0x20808000,0x00800020,0x20008020,0x00808000,0x00008020,0x00000000,0x00800000,0x20008020,
201 0x00808020,0x00000020,0x20000000,0x00008000,0x20000020,0x20008000,0x00808000,0x20800020,
202 0x00000000,0x00808020,0x00008020,0x20808000,0x20008000,0x00800000,0x20808020,0x20000000,
203 0x20008020,0x20800000,0x00800000,0x20808020,0x00008000,0x00800020,0x20800020,0x00008020,
204 0x00800020,0x00000000,0x20808000,0x20000020,0x20800000,0x20008020,0x00000020,0x00808000,
205 };
206
207 static long s3p[] = {
208 0x00080201,0x02000200,0x00000001,0x02080201,0x00000000,0x02080000,0x02000201,0x00080001,
209 0x02080200,0x02000001,0x02000000,0x00000201,0x02000001,0x00080201,0x00080000,0x02000000,
210 0x02080001,0x00080200,0x00000200,0x00000001,0x00080200,0x02000201,0x02080000,0x00000200,
211 0x00000201,0x00000000,0x00080001,0x02080200,0x02000200,0x02080001,0x02080201,0x00080000,
212 0x02080001,0x00000201,0x00080000,0x02000001,0x00080200,0x02000200,0x00000001,0x02080000,
213 0x02000201,0x00000000,0x00000200,0x00080001,0x00000000,0x02080001,0x02080200,0x00000200,
214 0x02000000,0x02080201,0x00080201,0x00080000,0x02080201,0x00000001,0x02000200,0x00080201,
215 0x00080001,0x00080200,0x02080000,0x02000201,0x00000201,0x02000000,0x02000001,0x02080200,
216 };
217
218 static long s4p[] = {
219 0x01000000,0x00002000,0x00000080,0x01002084,0x01002004,0x01000080,0x00002084,0x01002000,
220 0x00002000,0x00000004,0x01000004,0x00002080,0x01000084,0x01002004,0x01002080,0x00000000,
221 0x00002080,0x01000000,0x00002004,0x00000084,0x01000080,0x00002084,0x00000000,0x01000004,
222 0x00000004,0x01000084,0x01002084,0x00002004,0x01002000,0x00000080,0x00000084,0x01002080,
223 0x01002080,0x01000084,0x00002004,0x01002000,0x00002000,0x00000004,0x01000004,0x01000080,
224 0x01000000,0x00002080,0x01002084,0x00000000,0x00002084,0x01000000,0x00000080,0x00002004,
225 0x01000084,0x00000080,0x00000000,0x01002084,0x01002004,0x01002080,0x00000084,0x00002000,
226 0x00002080,0x01002004,0x01000080,0x00000084,0x00000004,0x00002084,0x01002000,0x01000004,
227 };
228
229 static long s5p[] = {
230 0x10000008,0x00040008,0x00000000,0x10040400,0x00040008,0x00000400,0x10000408,0x00040000,
231 0x00000408,0x10040408,0x00040400,0x10000000,0x10000400,0x10000008,0x10040000,0x00040408,
232 0x00040000,0x10000408,0x10040008,0x00000000,0x00000400,0x00000008,0x10040400,0x10040008,
233 0x10040408,0x10040000,0x10000000,0x00000408,0x00000008,0x00040400,0x00040408,0x10000400,
234 0x00000408,0x10000000,0x10000400,0x00040408,0x10040400,0x00040008,0x00000000,0x10000400,
235 0x10000000,0x00000400,0x10040008,0x00040000,0x00040008,0x10040408,0x00040400,0x00000008,
236 0x10040408,0x00040400,0x00040000,0x10000408,0x10000008,0x10040000,0x00040408,0x00000000,
237 0x00000400,0x10000008,0x10000408,0x10040400,0x10040000,0x00000408,0x00000008,0x10040008,
238 };
239
240 static long s6p[] = {
241 0x00000800,0x00000040,0x00200040,0x80200000,0x80200840,0x80000800,0x00000840,0x00000000,
242 0x00200000,0x80200040,0x80000040,0x00200800,0x80000000,0x00200840,0x00200800,0x80000040,
243 0x80200040,0x00000800,0x80000800,0x80200840,0x00000000,0x00200040,0x80200000,0x00000840,
244 0x80200800,0x80000840,0x00200840,0x80000000,0x80000840,0x80200800,0x00000040,0x00200000,
245 0x80000840,0x00200800,0x80200800,0x80000040,0x00000800,0x00000040,0x00200000,0x80200800,
246 0x80200040,0x80000840,0x00000840,0x00000000,0x00000040,0x80200000,0x80000000,0x00200040,
247 0x00000000,0x80200040,0x00200040,0x00000840,0x80000040,0x00000800,0x80200840,0x00200000,
248 0x00200840,0x80000000,0x80000800,0x80200840,0x80200000,0x00200840,0x00200800,0x80000800,
249 };
250
251 static long s7p[] = {
252 0x04100010,0x04104000,0x00004010,0x00000000,0x04004000,0x00100010,0x04100000,0x04104010,
253 0x00000010,0x04000000,0x00104000,0x00004010,0x00104010,0x04004010,0x04000010,0x04100000,
254 0x00004000,0x00104010,0x00100010,0x04004000,0x04104010,0x04000010,0x00000000,0x00104000,
255 0x04000000,0x00100000,0x04004010,0x04100010,0x00100000,0x00004000,0x04104000,0x00000010,
256 0x00100000,0x00004000,0x04000010,0x04104010,0x00004010,0x04000000,0x00000000,0x00104000,
257 0x04100010,0x04004010,0x04004000,0x00100010,0x04104000,0x00000010,0x00100010,0x04004000,
258 0x04104010,0x00100000,0x04100000,0x04000010,0x00104000,0x00004010,0x04004010,0x04100000,
259 0x00000010,0x04104000,0x00104010,0x00000000,0x04000000,0x04100010,0x00004000,0x00104010,
260 };
261
262 /*
263 * DES electronic codebook encryption of one block
264 */
265 static void
block_cipher(char expanded_key[128],char text[8],int decrypting)266 block_cipher(char expanded_key[128], char text[8], int decrypting)
267 {
268 char *key;
269 long crypto, temp, right, left;
270 int i, key_offset;
271
272 key = expanded_key;
273 left = ip_low(text);
274 right = ip_high(text);
275 if (decrypting) {
276 key_offset = 16;
277 key = key + 128 - 8;
278 } else
279 key_offset = 0;
280 for (i = 0; i < 16; i++) {
281 temp = (right << 1) | ((right >> 31) & 1);
282 crypto = s0p[(temp & 0x3f) ^ *key++];
283 crypto |= s1p[((temp >> 4) & 0x3f) ^ *key++];
284 crypto |= s2p[((temp >> 8) & 0x3f) ^ *key++];
285 crypto |= s3p[((temp >> 12) & 0x3f) ^ *key++];
286 crypto |= s4p[((temp >> 16) & 0x3f) ^ *key++];
287 crypto |= s5p[((temp >> 20) & 0x3f) ^ *key++];
288 crypto |= s6p[((temp >> 24) & 0x3f) ^ *key++];
289 temp = ((right & 1) << 5) | ((right >> 27) & 0x1f);
290 crypto |= s7p[temp ^ *key++];
291 temp = left;
292 left = right;
293 right = temp ^ crypto;
294 key -= key_offset;
295 }
296 /*
297 * standard final permutation (IPI)
298 * left and right are reversed here
299 */
300 fp(right, left, text);
301 }
302
303 /*
304 * Initial Permutation
305 */
306 static long iptab[] = {
307 0x00000000, 0x00008000, 0x00000000, 0x00008000,
308 0x00000080, 0x00008080, 0x00000080, 0x00008080
309 };
310
311 static long
ip_low(char block[8])312 ip_low(char block[8])
313 {
314 int i;
315 long l;
316
317 l = 0;
318 for(i = 0; i < 8; i++){
319 l |= iptab[(block[i] >> 4) & 7] >> i;
320 l |= iptab[block[i] & 7] << (16 - i);
321 }
322 return l;
323 }
324
325 static long
ip_high(char block[8])326 ip_high(char block[8])
327 {
328 int i;
329 long l;
330
331 l = 0;
332 for(i = 0; i < 8; i++){
333 l |= iptab[(block[i] >> 5) & 7] >> i;
334 l |= iptab[(block[i] >> 1) & 7] << (16 - i);
335 }
336 return l;
337 }
338
339 /*
340 * Final Permutation
341 */
342 static unsigned long fptab[] = {
343 0x00000000,0x80000000,0x00800000,0x80800000,0x00008000,0x80008000,0x00808000,0x80808000,
344 0x00000080,0x80000080,0x00800080,0x80800080,0x00008080,0x80008080,0x00808080,0x80808080,
345 };
346
347 static void
fp(long left,long right,char text[8])348 fp(long left, long right, char text[8])
349 {
350 unsigned long ta[2], t, v[2];
351 int i, j, sh;
352
353 ta[0] = right;
354 ta[1] = left;
355 v[0] = v[1] = 0;
356 for(i = 0; i < 2; i++){
357 t = ta[i];
358 sh = i;
359 for(j = 0; j < 4; j++){
360 v[1] |= fptab[t & 0xf] >> sh;
361 t >>= 4;
362 v[0] |= fptab[t & 0xf] >> sh;
363 t >>= 4;
364 sh += 2;
365 }
366 }
367 for(i = 0; i < 2; i++)
368 for(j = 0; j < 4; j++){
369 *text++ = (char)(v[i]&0xff);
370 v[i] >>= 8;
371 }
372 }
373
374 /*
375 * Key set-up
376 */
377 static uchar keyexpand[][15][2] = {
378 { 3, 2, 9, 8, 18, 8, 27, 32, 33, 2, 42, 16, 48, 8, 65, 16,
379 74, 2, 80, 2, 89, 4, 99, 16, 104, 4, 122, 32, 0, 0, },
380 { 1, 4, 8, 1, 18, 4, 25, 32, 34, 32, 41, 8, 50, 8, 59, 32,
381 64, 16, 75, 4, 90, 1, 97, 16, 106, 2, 112, 2, 123, 1, },
382 { 2, 1, 19, 8, 35, 1, 40, 1, 50, 4, 57, 32, 75, 2, 80, 32,
383 89, 1, 96, 16, 107, 4, 120, 8, 0, 0, 0, 0, 0, 0, },
384 { 4, 32, 20, 2, 31, 4, 37, 32, 47, 1, 54, 1, 63, 2, 68, 1,
385 78, 4, 84, 8, 101, 16, 108, 4, 119, 16, 126, 8, 0, 0, },
386 { 5, 4, 15, 4, 21, 32, 31, 1, 38, 1, 47, 2, 53, 2, 68, 8,
387 85, 16, 92, 4, 103, 16, 108, 32, 118, 32, 124, 2, 0, 0, },
388 { 15, 2, 21, 2, 39, 8, 46, 16, 55, 32, 61, 1, 71, 16, 76, 32,
389 86, 32, 93, 4, 102, 2, 108, 16, 117, 8, 126, 1, 0, 0, },
390 { 14, 16, 23, 32, 29, 1, 38, 8, 52, 2, 63, 4, 70, 2, 76, 16,
391 85, 8, 100, 1, 110, 4, 116, 8, 127, 8, 0, 0, 0, 0, },
392 { 1, 8, 8, 32, 17, 1, 24, 16, 35, 4, 50, 1, 57, 16, 67, 8,
393 83, 1, 88, 1, 98, 4, 105, 32, 114, 32, 123, 2, 0, 0, },
394 { 0, 1, 11, 16, 16, 4, 35, 2, 40, 32, 49, 1, 56, 16, 65, 2,
395 74, 16, 80, 8, 99, 8, 115, 1, 121, 4, 0, 0, 0, 0, },
396 { 9, 16, 18, 2, 24, 2, 33, 4, 43, 16, 48, 4, 66, 32, 73, 8,
397 82, 8, 91, 32, 97, 2, 106, 16, 112, 8, 122, 1, 0, 0, },
398 { 14, 32, 21, 4, 30, 2, 36, 16, 45, 8, 60, 1, 69, 2, 87, 8,
399 94, 16, 103, 32, 109, 1, 118, 8, 124, 32, 0, 0, 0, 0, },
400 { 7, 4, 14, 2, 20, 16, 29, 8, 44, 1, 54, 4, 60, 8, 71, 8,
401 78, 16, 87, 32, 93, 1, 102, 8, 116, 2, 125, 4, 0, 0, },
402 { 7, 2, 12, 1, 22, 4, 28, 8, 45, 16, 52, 4, 63, 16, 70, 8,
403 84, 2, 95, 4, 101, 32, 111, 1, 118, 1, 0, 0, 0, 0, },
404 { 6, 16, 13, 16, 20, 4, 31, 16, 36, 32, 46, 32, 53, 4, 62, 2,
405 69, 32, 79, 1, 86, 1, 95, 2, 101, 2, 119, 8, 0, 0, },
406 { 0, 32, 10, 8, 19, 32, 25, 2, 34, 16, 40, 8, 59, 8, 66, 2,
407 72, 2, 81, 4, 91, 16, 96, 4, 115, 2, 121, 8, 0, 0, },
408 { 3, 16, 10, 4, 17, 32, 26, 32, 33, 8, 42, 8, 51, 32, 57, 2,
409 67, 4, 82, 1, 89, 16, 98, 2, 104, 2, 113, 4, 120, 1, },
410 { 1, 16, 11, 8, 27, 1, 32, 1, 42, 4, 49, 32, 58, 32, 67, 2,
411 72, 32, 81, 1, 88, 16, 99, 4, 114, 1, 0, 0, 0, 0, },
412 { 6, 32, 12, 2, 23, 4, 29, 32, 39, 1, 46, 1, 55, 2, 61, 2,
413 70, 4, 76, 8, 93, 16, 100, 4, 111, 16, 116, 32, 0, 0, },
414 { 6, 2, 13, 32, 23, 1, 30, 1, 39, 2, 45, 2, 63, 8, 77, 16,
415 84, 4, 95, 16, 100, 32, 110, 32, 117, 4, 127, 4, 0, 0, },
416 { 4, 1, 13, 2, 31, 8, 38, 16, 47, 32, 53, 1, 62, 8, 68, 32,
417 78, 32, 85, 4, 94, 2, 100, 16, 109, 8, 127, 2, 0, 0, },
418 { 5, 16, 15, 32, 21, 1, 30, 8, 44, 2, 55, 4, 61, 32, 68, 16,
419 77, 8, 92, 1, 102, 4, 108, 8, 126, 16, 0, 0, 0, 0, },
420 { 2, 8, 9, 1, 16, 16, 27, 4, 42, 1, 49, 16, 58, 2, 75, 1,
421 80, 1, 90, 4, 97, 32, 106, 32, 113, 8, 120, 32, 0, 0, },
422 { 2, 4, 8, 4, 27, 2, 32, 32, 41, 1, 48, 16, 59, 4, 66, 16,
423 72, 8, 91, 8, 107, 1, 112, 1, 123, 16, 0, 0, 0, 0, },
424 { 3, 8, 10, 2, 16, 2, 25, 4, 35, 16, 40, 4, 59, 2, 65, 8,
425 74, 8, 83, 32, 89, 2, 98, 16, 104, 8, 121, 16, 0, 0, },
426 { 4, 2, 13, 4, 22, 2, 28, 16, 37, 8, 52, 1, 62, 4, 79, 8,
427 86, 16, 95, 32, 101, 1, 110, 8, 126, 32, 0, 0, 0, 0, },
428 { 5, 32, 12, 16, 21, 8, 36, 1, 46, 4, 52, 8, 70, 16, 79, 32,
429 85, 1, 94, 8, 108, 2, 119, 4, 126, 2, 0, 0, 0, 0, },
430 { 5, 2, 14, 4, 20, 8, 37, 16, 44, 4, 55, 16, 60, 32, 76, 2,
431 87, 4, 93, 32, 103, 1, 110, 1, 119, 2, 124, 1, 0, 0, },
432 { 7, 32, 12, 4, 23, 16, 28, 32, 38, 32, 45, 4, 54, 2, 60, 16,
433 71, 1, 78, 1, 87, 2, 93, 2, 111, 8, 118, 16, 125, 16, },
434 { 1, 1, 11, 32, 17, 2, 26, 16, 32, 8, 51, 8, 64, 2, 73, 4,
435 83, 16, 88, 4, 107, 2, 112, 32, 122, 8, 0, 0, 0, 0, },
436 { 0, 4, 9, 32, 18, 32, 25, 8, 34, 8, 43, 32, 49, 2, 58, 16,
437 74, 1, 81, 16, 90, 2, 96, 2, 105, 4, 115, 16, 122, 4, },
438 { 2, 2, 19, 1, 24, 1, 34, 4, 41, 32, 50, 32, 57, 8, 64, 32,
439 73, 1, 80, 16, 91, 4, 106, 1, 113, 16, 123, 8, 0, 0, },
440 { 3, 4, 10, 16, 16, 8, 35, 8, 51, 1, 56, 1, 67, 16, 72, 4,
441 91, 2, 96, 32, 105, 1, 112, 16, 121, 2, 0, 0, 0, 0, },
442 { 4, 16, 15, 1, 22, 1, 31, 2, 37, 2, 55, 8, 62, 16, 69, 16,
443 76, 4, 87, 16, 92, 32, 102, 32, 109, 4, 118, 2, 125, 32, },
444 { 6, 4, 23, 8, 30, 16, 39, 32, 45, 1, 54, 8, 70, 32, 77, 4,
445 86, 2, 92, 16, 101, 8, 116, 1, 125, 2, 0, 0, 0, 0, },
446 { 4, 4, 13, 1, 22, 8, 36, 2, 47, 4, 53, 32, 63, 1, 69, 8,
447 84, 1, 94, 4, 100, 8, 117, 16, 127, 32, 0, 0, 0, 0, },
448 { 3, 32, 8, 16, 19, 4, 34, 1, 41, 16, 50, 2, 56, 2, 67, 1,
449 72, 1, 82, 4, 89, 32, 98, 32, 105, 8, 114, 8, 121, 1, },
450 { 1, 32, 19, 2, 24, 32, 33, 1, 40, 16, 51, 4, 64, 8, 83, 8,
451 99, 1, 104, 1, 114, 4, 120, 4, 0, 0, 0, 0, 0, 0, },
452 { 8, 2, 17, 4, 27, 16, 32, 4, 51, 2, 56, 32, 66, 8, 75, 32,
453 81, 2, 90, 16, 96, 8, 115, 8, 122, 2, 0, 0, 0, 0, },
454 { 2, 16, 18, 1, 25, 16, 34, 2, 40, 2, 49, 4, 59, 16, 66, 4,
455 73, 32, 82, 32, 89, 8, 98, 8, 107, 32, 113, 2, 123, 4, },
456 { 7, 1, 13, 8, 28, 1, 38, 4, 44, 8, 61, 16, 71, 32, 77, 1,
457 86, 8, 100, 2, 111, 4, 117, 32, 124, 16, 0, 0, 0, 0, },
458 { 12, 8, 29, 16, 36, 4, 47, 16, 52, 32, 62, 32, 68, 2, 79, 4,
459 85, 32, 95, 1, 102, 1, 111, 2, 117, 2, 126, 4, 0, 0, },
460 { 5, 1, 15, 16, 20, 32, 30, 32, 37, 4, 46, 2, 52, 16, 61, 8,
461 70, 1, 79, 2, 85, 2, 103, 8, 110, 16, 119, 32, 124, 4, },
462 { 0, 16, 9, 2, 18, 16, 24, 8, 43, 8, 59, 1, 65, 4, 75, 16,
463 80, 4, 99, 2, 104, 32, 113, 1, 123, 32, 0, 0, 0, 0, },
464 { 10, 32, 17, 8, 26, 8, 35, 32, 41, 2, 50, 16, 56, 8, 66, 1,
465 73, 16, 82, 2, 88, 2, 97, 4, 107, 16, 112, 4, 121, 32, },
466 { 0, 2, 11, 1, 16, 1, 26, 4, 33, 32, 42, 32, 49, 8, 58, 8,
467 65, 1, 72, 16, 83, 4, 98, 1, 105, 16, 114, 2, 0, 0, },
468 { 8, 8, 27, 8, 43, 1, 48, 1, 58, 4, 64, 4, 83, 2, 88, 32,
469 97, 1, 104, 16, 115, 4, 122, 16, 0, 0, 0, 0, 0, 0, },
470 { 5, 8, 14, 1, 23, 2, 29, 2, 47, 8, 54, 16, 63, 32, 68, 4,
471 79, 16, 84, 32, 94, 32, 101, 4, 110, 2, 116, 16, 127, 1, },
472 { 4, 8, 15, 8, 22, 16, 31, 32, 37, 1, 46, 8, 60, 2, 69, 4,
473 78, 2, 84, 16, 93, 8, 108, 1, 118, 4, 0, 0, 0, 0, },
474 { 7, 16, 14, 8, 28, 2, 39, 4, 45, 32, 55, 1, 62, 1, 76, 1,
475 86, 4, 92, 8, 109, 16, 116, 4, 125, 1, 0, 0, 0, 0, },
476 { 1, 2, 11, 4, 26, 1, 33, 16, 42, 2, 48, 2, 57, 4, 64, 1,
477 74, 4, 81, 32, 90, 32, 97, 8, 106, 8, 115, 32, 120, 16, },
478 { 2, 32, 11, 2, 16, 32, 25, 1, 32, 16, 43, 4, 58, 1, 75, 8,
479 91, 1, 96, 1, 106, 4, 113, 32, 0, 0, 0, 0, 0, 0, },
480 { 3, 1, 9, 4, 19, 16, 24, 4, 43, 2, 48, 32, 57, 1, 67, 32,
481 73, 2, 82, 16, 88, 8, 107, 8, 120, 2, 0, 0, 0, 0, },
482 { 0, 8, 10, 1, 17, 16, 26, 2, 32, 2, 41, 4, 51, 16, 56, 4,
483 65, 32, 74, 32, 81, 8, 90, 8, 99, 32, 105, 2, 114, 16, },
484 { 6, 1, 20, 1, 30, 4, 36, 8, 53, 16, 60, 4, 69, 1, 78, 8,
485 92, 2, 103, 4, 109, 32, 119, 1, 125, 8, 0, 0, 0, 0, },
486 { 7, 8, 21, 16, 28, 4, 39, 16, 44, 32, 54, 32, 61, 4, 71, 4,
487 77, 32, 87, 1, 94, 1, 103, 2, 109, 2, 124, 8, 0, 0, },
488 { 6, 8, 12, 32, 22, 32, 29, 4, 38, 2, 44, 16, 53, 8, 71, 2,
489 77, 2, 95, 8, 102, 16, 111, 32, 117, 1, 127, 16, 0, 0, }
490 };
491
492 static void
key_setup(char key[DESKEYLEN],char * ek)493 key_setup(char key[DESKEYLEN], char *ek)
494 {
495 int i, j, k, mask;
496 uchar (*x)[2];
497
498 memset(ek, 0, 128);
499 x = keyexpand[0];
500 for(i = 0; i < 7; i++){
501 k = key[i];
502 for(mask = 0x80; mask; mask >>= 1){
503 if(k & mask)
504 for(j = 0; j < 15; j++)
505 ek[x[j][0]] |= x[j][1];
506 x += 15;
507 }
508 }
509 }
510
511
512 /************ netkey main.c *************/
513 int
passtokey(char * key,char * p)514 passtokey(char *key, char *p)
515 {
516 uchar buf[NAMELEN], *t;
517 int i, n;
518
519 n = strlen(p);
520 if(n >= NAMELEN)
521 n = NAMELEN-1;
522 memset(buf, ' ', 8);
523 t = buf;
524 strncpy((char*)t, p, n);
525 t[n] = '\0';
526 memset(key, 0, DESKEYLEN);
527 for(;;){
528 for(i = 0; i < DESKEYLEN; i++)
529 key[i] = (t[i] >> i) + (t[i+1] << (8 - (i+1)));
530 if(n <= 8)
531 return 1;
532 n -= 8;
533 t += 8;
534 if(n < 8){
535 t -= 8 - n;
536 n = 8;
537 }
538 encrypt9(key, t, 8);
539 }
540 }
541
542 int
netcrypt(void * key,void * chal)543 netcrypt(void *key, void *chal)
544 {
545 uchar buf[8], *p;
546
547 strncpy((char*)buf, chal, 7);
548 buf[7] = '\0';
549 for(p = buf; *p && *p != '\n'; p++)
550 ;
551 *p = '\0';
552 encrypt9(key, buf, 8);
553 sprintf(chal, "%.2x%.2x%.2x%.2x", buf[0], buf[1], buf[2], buf[3]);
554 return 1;
555 }
556
557 void
main(int argc,char * argv[])558 main(int argc, char *argv[])
559 {
560 char buf[32], pass[32], key[DESKEYLEN];
561 int n;
562
563 printf("Run this directly on the local processor, NOT in a\n");
564 printf(" window to a computer across the network.\n");
565 printf("Type when no one else is looking.\n\n");
566 printf("password: ");
567 fflush(stdout);
568 n = read(0, pass, sizeof pass - 1);
569 if(n <= 0)
570 exit(0);
571 pass[n] = 0;
572 if(pass[n-1]=='\n')
573 pass[--n] = 0;
574 if(pass[n-1]=='\r')
575 pass[--n] = 0;
576 passtokey(key,pass);
577 for(;;){
578 printf("challenge: ");
579 fflush(stdout);
580 n = read(0, buf, sizeof buf - 1);
581 if(n <= 0)
582 exit(0);
583 buf[n] = '\0';
584 netcrypt(key, buf);
585 printf("response: %s\n", buf);
586 }
587 }
588