| 1 |
/* Mixmaster version 3.0 -- (C) 1999 - 2006 Anonymizer Inc. and others.
|
| 2 |
|
| 3 |
Mixmaster may be redistributed and modified under certain conditions.
|
| 4 |
This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
|
| 5 |
ANY KIND, either express or implied. See the file COPYRIGHT for
|
| 6 |
details.
|
| 7 |
|
| 8 |
Process Cypherpunk remailer messages
|
| 9 |
$Id$ */
|
| 10 |
|
| 11 |
|
| 12 |
#include "mix3.h"
|
| 13 |
#include <ctype.h>
|
| 14 |
#include <time.h>
|
| 15 |
#include <string.h>
|
| 16 |
#include <assert.h>
|
| 17 |
#include <stdlib.h>
|
| 18 |
|
| 19 |
static int t1msg(BUFFER *in, int hdr);
|
| 20 |
|
| 21 |
int isline(BUFFER *line, char *text)
|
| 22 |
{
|
| 23 |
int i;
|
| 24 |
|
| 25 |
if (!bufileft(line, text))
|
| 26 |
return (0);
|
| 27 |
|
| 28 |
for (i = strlen(text); i < line->length; i++)
|
| 29 |
if (!isspace(line->data[i]))
|
| 30 |
return(0);
|
| 31 |
return(1);
|
| 32 |
}
|
| 33 |
|
| 34 |
int t1_decrypt(BUFFER *in)
|
| 35 |
{
|
| 36 |
int ret;
|
| 37 |
|
| 38 |
buf_rewind(in);
|
| 39 |
if (TYPE1[0] == '\0')
|
| 40 |
ret = t1msg(in, 1);
|
| 41 |
else {
|
| 42 |
FILE *f;
|
| 43 |
|
| 44 |
f = openpipe(TYPE1);
|
| 45 |
if (f == NULL)
|
| 46 |
return -1;
|
| 47 |
buf_write(in, f);
|
| 48 |
ret = closepipe(f);
|
| 49 |
}
|
| 50 |
if (ret == 0)
|
| 51 |
stats_log(1);
|
| 52 |
return (ret);
|
| 53 |
}
|
| 54 |
|
| 55 |
#ifdef USE_IDEA
|
| 56 |
void t1_esub(BUFFER *esub, BUFFER *subject)
|
| 57 |
{
|
| 58 |
BUFFER *iv, *out;
|
| 59 |
char hex[33];
|
| 60 |
|
| 61 |
iv = buf_new();
|
| 62 |
out = buf_new();
|
| 63 |
|
| 64 |
buf_appendrnd(iv, 8);
|
| 65 |
id_encode(iv->data, hex);
|
| 66 |
buf_append(out, hex, 16);
|
| 67 |
|
| 68 |
digest_md5(esub, esub);
|
| 69 |
digest_md5(subject, subject);
|
| 70 |
buf_ideacrypt(subject, esub, iv, ENCRYPT);
|
| 71 |
id_encode(subject->data, hex);
|
| 72 |
buf_appends(out, hex);
|
| 73 |
buf_move(subject, out);
|
| 74 |
buf_free(iv);
|
| 75 |
buf_free(out);
|
| 76 |
}
|
| 77 |
#endif /* USE_IDEA */
|
| 78 |
|
| 79 |
void t1_hsub(BUFFER *subject)
|
| 80 |
{
|
| 81 |
BUFFER *iv, *out;
|
| 82 |
char hex[33];
|
| 83 |
|
| 84 |
iv = buf_new();
|
| 85 |
out = buf_new();
|
| 86 |
|
| 87 |
buf_appendrnd(iv, 8);
|
| 88 |
id_encode(iv->data, hex);
|
| 89 |
buf_append(out, hex, 16);
|
| 90 |
|
| 91 |
buf_cat(iv, subject);
|
| 92 |
digest_sha256(iv, iv);
|
| 93 |
id_encode(iv->data, hex);
|
| 94 |
buf_append(out, hex, 32);
|
| 95 |
|
| 96 |
buf_move(subject, out);
|
| 97 |
buf_free(iv);
|
| 98 |
buf_free(out);
|
| 99 |
}
|
| 100 |
|
| 101 |
#define N(X) (isdigit(X) ? (X)-'0' : 0)
|
| 102 |
|
| 103 |
static int readnum(BUFFER *b, int f)
|
| 104 |
{
|
| 105 |
int num = 0;
|
| 106 |
|
| 107 |
if (b->length > 0)
|
| 108 |
sscanf(b->data, "%d", &num);
|
| 109 |
num *= f;
|
| 110 |
if (strchr(b->data, 'r'))
|
| 111 |
num = rnd_number(num) + 1;
|
| 112 |
return (num);
|
| 113 |
}
|
| 114 |
|
| 115 |
static int readdate(BUFFER *b)
|
| 116 |
{
|
| 117 |
int num = -1;
|
| 118 |
|
| 119 |
if (b->length > 0)
|
| 120 |
num = parsedate(b->data);
|
| 121 |
return (num);
|
| 122 |
}
|
| 123 |
|
| 124 |
static int reached_maxcount(BUFFER *md, int maxcount)
|
| 125 |
{
|
| 126 |
FILE *f;
|
| 127 |
char temp[LINELEN];
|
| 128 |
int count = 0;
|
| 129 |
int err = 0;
|
| 130 |
long then;
|
| 131 |
time_t now = time(NULL);
|
| 132 |
|
| 133 |
assert(md->length > 0);
|
| 134 |
|
| 135 |
encode(md, 0);
|
| 136 |
|
| 137 |
f = mix_openfile(PGPMAXCOUNT, "a+"); /* create file if it does not exist */
|
| 138 |
fseek(f,0,SEEK_SET);
|
| 139 |
if (f == NULL) {
|
| 140 |
errlog(ERRORMSG, "Can't open %s!\n", PGPMAXCOUNT);
|
| 141 |
return (-1);
|
| 142 |
}
|
| 143 |
lock(f);
|
| 144 |
while (fgets(temp, sizeof(temp), f) != NULL)
|
| 145 |
if (sscanf(temp, "%ld", &then) &&
|
| 146 |
(then >= now - SECONDSPERDAY) &&
|
| 147 |
strstr (temp, md->data))
|
| 148 |
count++;
|
| 149 |
|
| 150 |
if (count > maxcount)
|
| 151 |
err = 1;
|
| 152 |
else
|
| 153 |
fprintf(f, "%ld %s\n", (long) time(NULL), md->data);
|
| 154 |
|
| 155 |
unlock(f);
|
| 156 |
fclose(f);
|
| 157 |
return (err);
|
| 158 |
}
|
| 159 |
|
| 160 |
static int t1msg(BUFFER *in, int hdr)
|
| 161 |
/* hdr = 1: mail header, hdr = 2: pasted header, hdr = 0: ignore */
|
| 162 |
{
|
| 163 |
BUFFER *field, *content, *line;
|
| 164 |
BUFFER *cutmarks, *to, *newsgroups, *ek, *ekdes, *ekcast, *esub, *subject;
|
| 165 |
BUFFER *temp, *header, *out;
|
| 166 |
BUFFER *test, *testto, *remixto;
|
| 167 |
BUFFER *digest;
|
| 168 |
int err = 0;
|
| 169 |
int encrypted = 0;
|
| 170 |
int type = -1;
|
| 171 |
int latent = 0;
|
| 172 |
int remix = 0, repgp = 0;
|
| 173 |
int inflate = 0;
|
| 174 |
int maxsize = -1;
|
| 175 |
int maxcount = -1;
|
| 176 |
int maxdate = -2; /* -2 not used, -1 parse error */
|
| 177 |
int hsub = 0;
|
| 178 |
|
| 179 |
field = buf_new();
|
| 180 |
content = buf_new();
|
| 181 |
line = buf_new();
|
| 182 |
to = buf_new();
|
| 183 |
remixto = buf_new();
|
| 184 |
cutmarks = buf_new();
|
| 185 |
newsgroups = buf_new();
|
| 186 |
ek = buf_new();
|
| 187 |
ekdes = buf_new();
|
| 188 |
ekcast = buf_new();
|
| 189 |
esub = buf_new();
|
| 190 |
subject = buf_new();
|
| 191 |
temp = buf_new();
|
| 192 |
header = buf_new();
|
| 193 |
out = buf_new();
|
| 194 |
test = buf_new();
|
| 195 |
testto = buf_new();
|
| 196 |
digest = buf_new();
|
| 197 |
|
| 198 |
if (REMIX == 1)
|
| 199 |
remix = 2;
|
| 200 |
if (!UNENCRYPTED)
|
| 201 |
encrypted = -1;
|
| 202 |
|
| 203 |
header:
|
| 204 |
while (buf_getheader(in, field, content) == 0) {
|
| 205 |
if (header->length == 0 && bufieq(content, ":")) /* HDRMARK */
|
| 206 |
hdr = 2;
|
| 207 |
|
| 208 |
if (bufieq(field, "test-to"))
|
| 209 |
buf_set(testto, content);
|
| 210 |
else if (PGP && bufieq(field, "encrypted"))
|
| 211 |
encrypted = 1;
|
| 212 |
else if (bufieq(field, "remix-to")) {
|
| 213 |
remix = 1; repgp = 0;
|
| 214 |
buf_set(remixto, content);
|
| 215 |
if (type == -1)
|
| 216 |
type = MSG_MAIL;
|
| 217 |
} else if (bufieq(field, "encrypt-to")) {
|
| 218 |
repgp = remix = 1;
|
| 219 |
buf_set(remixto, content);
|
| 220 |
if (type == -1)
|
| 221 |
type = MSG_MAIL;
|
| 222 |
} else if (bufieq(field, "anon-to") ||
|
| 223 |
bufieq(field, "request-remailing-to") ||
|
| 224 |
bufieq(field, "remail-to") ||
|
| 225 |
bufieq(field, "anon-send-to")) {
|
| 226 |
if (bufieq(field, "remail-to"))
|
| 227 |
repgp = remix = 0;
|
| 228 |
if (to->length > 0)
|
| 229 |
buf_appendc(to, ',');
|
| 230 |
buf_cat(to, content);
|
| 231 |
if (type == -1)
|
| 232 |
type = MSG_MAIL;
|
| 233 |
} else if (bufieq(field, "anon-post-to") || bufieq(field, "post-to")) {
|
| 234 |
if (newsgroups->length > 0)
|
| 235 |
buf_appendc(newsgroups, ',');
|
| 236 |
buf_cat(newsgroups, content);
|
| 237 |
type = MSG_POST;
|
| 238 |
} else if (bufieq(field, "cutmarks"))
|
| 239 |
buf_set(cutmarks, content);
|
| 240 |
else if (bufieq(field, "latent-time")) {
|
| 241 |
byte *q;
|
| 242 |
int l;
|
| 243 |
|
| 244 |
q = content->data;
|
| 245 |
l = strlen(q);
|
| 246 |
latent = 0;
|
| 247 |
if (q[0] == '+')
|
| 248 |
q++;
|
| 249 |
if (l >= 5 && q[2] == ':')
|
| 250 |
latent = 600 * N(q[0]) + 60 * N(q[1]) + 10 * N(q[3]) + N(q[4]);
|
| 251 |
else if (l >= 4 && q[1] == ':')
|
| 252 |
latent = 60 * N(q[0]) + 10 * N(q[2]) + N(q[3]);
|
| 253 |
else if (l >= 3 && q[0] == ':')
|
| 254 |
latent = 10 * N(q[1]) + N(q[2]);
|
| 255 |
if (!bufleft(content, "+")) {
|
| 256 |
time_t now;
|
| 257 |
|
| 258 |
time(&now);
|
| 259 |
latent -= localtime(&now)->tm_hour * 60;
|
| 260 |
if (latent < 0)
|
| 261 |
latent += 24 * 60;
|
| 262 |
}
|
| 263 |
if (q[l - 1] == 'r')
|
| 264 |
latent = rnd_number(latent);
|
| 265 |
} else if (bufieq(field, "null"))
|
| 266 |
type = MSG_NULL;
|
| 267 |
#ifdef USE_IDEA
|
| 268 |
else if (bufieq(field, "encrypt-key") || bufieq(field, "encrypt-idea"))
|
| 269 |
buf_set(ek, content);
|
| 270 |
#else
|
| 271 |
else if (bufieq(field, "encrypt-key") || bufieq(field, "encrypt-idea"))
|
| 272 |
buf_set(ekdes, content);
|
| 273 |
#endif
|
| 274 |
else if (bufieq(field, "encrypt-des") || bufieq(field, "encrypt-3des"))
|
| 275 |
buf_set(ekdes, content);
|
| 276 |
else if (bufieq(field, "encrypt-cast") || bufieq(field, "encrypt-cast5"))
|
| 277 |
buf_set(ekcast, content);
|
| 278 |
else if (bufieq(field, "encrypt-subject"))
|
| 279 |
buf_set(esub, content);
|
| 280 |
else if (bufieq(field, "hash-subject") && bufieq(content, "yes"))
|
| 281 |
hsub = 1;
|
| 282 |
else if (bufieq(field, "inflate")) {
|
| 283 |
inflate = readnum(content, 1024);
|
| 284 |
if (inflate > INFLATEMAX * 1024)
|
| 285 |
inflate = INFLATEMAX * 1024;
|
| 286 |
} else if (bufieq(field, "rand-hop")) {
|
| 287 |
int randhops, i;
|
| 288 |
randhops = readnum(content, 1);
|
| 289 |
if (randhops > MAXRANDHOPS)
|
| 290 |
randhops = MAXRANDHOPS;
|
| 291 |
buf_clear(temp);
|
| 292 |
if (remixto->length)
|
| 293 |
buf_move(temp, remixto);
|
| 294 |
for (i = 0; i < randhops; i++) {
|
| 295 |
if (remixto->length > 0)
|
| 296 |
buf_appendc(remixto, ',');
|
| 297 |
buf_appendc(remixto, '*');
|
| 298 |
}
|
| 299 |
if (temp->length) {
|
| 300 |
buf_appendc(remixto, ',');
|
| 301 |
buf_cat(remixto, temp);
|
| 302 |
}
|
| 303 |
} else if (bufieq(field, "max-size") || bufieq(field, "maxsize"))
|
| 304 |
maxsize = readnum(content, 1024);
|
| 305 |
else if (bufieq(field, "max-count") || bufieq(field, "maxcount"))
|
| 306 |
maxcount = readnum(content, 1);
|
| 307 |
else if (bufieq(field, "max-date") || bufieq(field, "maxdate"))
|
| 308 |
maxdate = readdate(content);
|
| 309 |
#if USE_NSUB
|
| 310 |
else if (bufieq(field, "subject"))
|
| 311 |
buf_set(subject, content);
|
| 312 |
#endif /* USE_NSUB */
|
| 313 |
}
|
| 314 |
|
| 315 |
if (cutmarks->length > 0) {
|
| 316 |
BUFFER *cut;
|
| 317 |
|
| 318 |
cut = buf_new();
|
| 319 |
buf_clear(temp);
|
| 320 |
|
| 321 |
while ((err = buf_getline(in, line)) != -1 && !buf_eq(line, cutmarks)) {
|
| 322 |
buf_cat(temp, line);
|
| 323 |
buf_nl(temp);
|
| 324 |
}
|
| 325 |
while (err != -1) {
|
| 326 |
err = buf_getline(in, line);
|
| 327 |
if (err == -1 || buf_eq(line, cutmarks)) {
|
| 328 |
t1msg(cut, 0);
|
| 329 |
buf_clear(cut);
|
| 330 |
} else {
|
| 331 |
buf_cat(cut, line);
|
| 332 |
buf_nl(cut);
|
| 333 |
}
|
| 334 |
}
|
| 335 |
buf_move(in, temp);
|
| 336 |
buf_clear(cutmarks);
|
| 337 |
}
|
| 338 |
if (encrypted == 1) {
|
| 339 |
#ifdef USE_PGP
|
| 340 |
err = pgp_dearmor(in, temp);
|
| 341 |
if (err == 0) {
|
| 342 |
BUFFER *pass;
|
| 343 |
digest_sha1(temp, digest);
|
| 344 |
|
| 345 |
pass = buf_new();
|
| 346 |
buf_sets(pass, PASSPHRASE);
|
| 347 |
err = pgp_decrypt(temp, pass, NULL, NULL, NULL);
|
| 348 |
buf_free(pass);
|
| 349 |
}
|
| 350 |
if (err != -1 && temp->length == 0) {
|
| 351 |
errlog(ERRORMSG, "Empty PGP message.\n");
|
| 352 |
err = -1;
|
| 353 |
goto end;
|
| 354 |
}
|
| 355 |
if (err != -1) {
|
| 356 |
buf_rest(temp, in); /* dangerous, but required for reply blocks */
|
| 357 |
buf_move(in, temp);
|
| 358 |
encrypted = 0;
|
| 359 |
hdr = 0;
|
| 360 |
goto header;
|
| 361 |
}
|
| 362 |
#endif /* USE_PGP */
|
| 363 |
if (testto->length == 0)
|
| 364 |
errlog(ERRORMSG, "Can't decrypt PGP message.\n");
|
| 365 |
buf_appends(test, "Can't decrypt PGP message.\n");
|
| 366 |
}
|
| 367 |
while ((err = buf_lookahead(in, line)) == 1)
|
| 368 |
buf_getline(in, line);
|
| 369 |
#if 0
|
| 370 |
if (err == -1)
|
| 371 |
goto end;
|
| 372 |
#endif /* 0 */
|
| 373 |
|
| 374 |
if (isline(line, HDRMARK) && (hdr == 0 || hdr == 1)) {
|
| 375 |
buf_getline(in, NULL);
|
| 376 |
hdr = 2;
|
| 377 |
goto header;
|
| 378 |
} else if (isline(line, HASHMARK)) {
|
| 379 |
buf_getline(in, NULL);
|
| 380 |
for (;;) {
|
| 381 |
if (buf_lookahead(in, line) == 0 && bufileft(line, "subject:")) {
|
| 382 |
buf_getheader(in, field, content);
|
| 383 |
buf_set(subject, content);
|
| 384 |
}
|
| 385 |
if (buf_getline(in, line) != 0)
|
| 386 |
break;
|
| 387 |
buf_cat(header, line);
|
| 388 |
buf_nl(header);
|
| 389 |
}
|
| 390 |
}
|
| 391 |
if (encrypted == -1) {
|
| 392 |
if (testto->length == 0)
|
| 393 |
errlog(LOG, "Unencrypted message detected.\n");
|
| 394 |
buf_appends(test, "Unencrypted message detected.\n");
|
| 395 |
err = -2;
|
| 396 |
goto end;
|
| 397 |
}
|
| 398 |
if (maxdate == -1) {
|
| 399 |
if (testto->length == 0)
|
| 400 |
errlog(LOG, "Could not parse Max-Date: header.\n");
|
| 401 |
buf_appends(test, "Could not parse Max-Date: header.\n");
|
| 402 |
err = -2;
|
| 403 |
goto end;
|
| 404 |
} else if (maxdate >= 0 && maxdate <= time(NULL)) {
|
| 405 |
if (testto->length == 0)
|
| 406 |
errlog(LOG, "Message is expired.\n");
|
| 407 |
buf_appends(test, "Message is expired.\n");
|
| 408 |
err = -2;
|
| 409 |
goto end;
|
| 410 |
}
|
| 411 |
if (maxsize >= 0 && in->length >= maxsize) {
|
| 412 |
if (testto->length == 0)
|
| 413 |
errlog(LOG, "Message Size exceeds Max-Size.\n");
|
| 414 |
buf_appends(test, "Message Size exceeds Max-Size.\n");
|
| 415 |
err = -2;
|
| 416 |
goto end;
|
| 417 |
}
|
| 418 |
if (maxcount >= 0) {
|
| 419 |
if (digest->length == 0) {
|
| 420 |
if (testto->length == 0)
|
| 421 |
errlog(LOG, "Max-Count yet not encrypted.\n");
|
| 422 |
buf_appends(test, "Max-Count yet not encrypted.\n");
|
| 423 |
err = -2;
|
| 424 |
goto end;
|
| 425 |
}
|
| 426 |
if (reached_maxcount(digest, maxcount)) {
|
| 427 |
if (testto->length == 0)
|
| 428 |
errlog(LOG, "Max-Count reached - discarding message.\n");
|
| 429 |
buf_appends(test, "Max-Count reached - discarding message.\n");
|
| 430 |
err = -2;
|
| 431 |
goto end;
|
| 432 |
}
|
| 433 |
}
|
| 434 |
|
| 435 |
if (type == MSG_POST && subject->length == 0)
|
| 436 |
buf_sets(subject, "(no subject)");
|
| 437 |
|
| 438 |
if (to->length > 0)
|
| 439 |
buf_appendf(out, "To: %b\n", to);
|
| 440 |
else if (remixto->length > 0)
|
| 441 |
buf_appendf(out, "To: %b\n", remixto);
|
| 442 |
if (newsgroups->length > 0)
|
| 443 |
buf_appendf(out, "Newsgroups: %b\n", newsgroups);
|
| 444 |
if (subject->length > 0) {
|
| 445 |
#ifdef USE_IDEA
|
| 446 |
if (esub->length > 0)
|
| 447 |
t1_esub(esub, subject);
|
| 448 |
#endif /* USE_IDEA */
|
| 449 |
if (hsub == 1)
|
| 450 |
t1_hsub(subject);
|
| 451 |
buf_appendf(out, "Subject: %b\n", subject);
|
| 452 |
}
|
| 453 |
buf_cat(out, header);
|
| 454 |
buf_nl(out);
|
| 455 |
|
| 456 |
#if 0
|
| 457 |
inflate -= in->length;
|
| 458 |
#endif /* 0 */
|
| 459 |
if (inflate > 0) {
|
| 460 |
buf_setrnd(temp, inflate * 3 / 4);
|
| 461 |
encode(temp, 64);
|
| 462 |
buf_appends(in, "\n-----BEGIN GARBAGE-----\n");
|
| 463 |
buf_cat(in, temp);
|
| 464 |
buf_appends(in, "-----END GARBAGE-----\n");
|
| 465 |
}
|
| 466 |
|
| 467 |
if (!(ek->length || ekdes->length || ekcast->length))
|
| 468 |
buf_rest(out, in);
|
| 469 |
else {
|
| 470 |
err = 0;
|
| 471 |
buf_clear(temp);
|
| 472 |
while (buf_getline(in, line) != -1) {
|
| 473 |
if (isline(line, EKMARK)) {
|
| 474 |
buf_cat(out, temp);
|
| 475 |
buf_clear(temp);
|
| 476 |
buf_rest(temp, in);
|
| 477 |
break;
|
| 478 |
}
|
| 479 |
else {
|
| 480 |
buf_cat(temp, line);
|
| 481 |
buf_nl(temp);
|
| 482 |
}
|
| 483 |
}
|
| 484 |
#ifdef USE_PGP
|
| 485 |
if (ekcast->length) {
|
| 486 |
err = pgp_encrypt(PGP_CONVCAST | PGP_TEXT, temp, ekcast, NULL, NULL,
|
| 487 |
NULL, NULL);
|
| 488 |
buf_clear(ekcast);
|
| 489 |
}
|
| 490 |
if (ekdes->length) {
|
| 491 |
err = pgp_encrypt(PGP_CONV3DES | PGP_TEXT, temp, ekdes, NULL, NULL,
|
| 492 |
NULL, NULL);
|
| 493 |
buf_clear(ekdes);
|
| 494 |
}
|
| 495 |
if (ek->length) {
|
| 496 |
err = pgp_encrypt(PGP_CONVENTIONAL | PGP_TEXT, temp, ek, NULL, NULL,
|
| 497 |
NULL, NULL);
|
| 498 |
buf_clear(ek);
|
| 499 |
}
|
| 500 |
buf_appends(out, EKMARK);
|
| 501 |
buf_nl(out);
|
| 502 |
buf_cat(out, temp);
|
| 503 |
#else /* end of USE_PGP */
|
| 504 |
err = -1;
|
| 505 |
#endif /* Else if not USE_PGP */
|
| 506 |
}
|
| 507 |
|
| 508 |
if (type == -1) {
|
| 509 |
buf_appends(test, "No destination.\n");
|
| 510 |
err = -1;
|
| 511 |
}
|
| 512 |
|
| 513 |
end:
|
| 514 |
if (testto->length) {
|
| 515 |
BUFFER *report;
|
| 516 |
int i;
|
| 517 |
|
| 518 |
report = buf_new();
|
| 519 |
buf_sets(report,
|
| 520 |
"Subject: remailer test report\n\nThis is an automated response to the test message you sent to ");
|
| 521 |
buf_appends(report, SHORTNAME);
|
| 522 |
buf_appends(report, ".\nYour test message results follow:\n\n");
|
| 523 |
buf_appends(report, remailer_type);
|
| 524 |
buf_appends(report, VERSION);
|
| 525 |
buf_appends(report, "\n\n");
|
| 526 |
if (err == 0) {
|
| 527 |
err = filtermsg(out);
|
| 528 |
if (err == -1)
|
| 529 |
buf_appends(report, "This remailer cannot deliver the message.\n\n");
|
| 530 |
else {
|
| 531 |
buf_appends(report, "Valid ");
|
| 532 |
buf_appends(report, type == MSG_POST ? "Usenet" : "mail");
|
| 533 |
buf_appends(report, " message.\n");
|
| 534 |
if (remixto->length) {
|
| 535 |
if (remix && MIX)
|
| 536 |
buf_appends(report, "Delivery via Mixmaster: ");
|
| 537 |
else if (remix)
|
| 538 |
buf_appends(report, "Error! Can't remix: ");
|
| 539 |
else
|
| 540 |
buf_appends(report, "Delivery via Cypherpunk remailer: ");
|
| 541 |
buf_cat(report, remixto);
|
| 542 |
buf_nl(report);
|
| 543 |
}
|
| 544 |
else if (type == MSG_POST && strchr(NEWS, '@') && !strchr(NEWS, ' ')) {
|
| 545 |
buf_appendf(report, "News gateway: %s\n", NEWS);
|
| 546 |
}
|
| 547 |
buf_appends(report,
|
| 548 |
"\n=========================================================================\nThe first 20 lines of the message follow:\n");
|
| 549 |
if (err != 1)
|
| 550 |
buf_appendf(report, "From: %s\n", ANONNAME);
|
| 551 |
if (type == MSG_POST && ORGANIZATION[0] != '\0')
|
| 552 |
buf_appendf(report, "Organization: %s\n", ORGANIZATION);
|
| 553 |
}
|
| 554 |
for (i = 0; i < 20 && buf_getline(out, test) != -1; i++)
|
| 555 |
buf_cat(report, test), buf_nl(report);
|
| 556 |
} else {
|
| 557 |
buf_appends(report, "The remailer message is invalid.\n\n");
|
| 558 |
if (test->length) {
|
| 559 |
buf_appends(report, "The following error occurred: ");
|
| 560 |
buf_cat(report, test);
|
| 561 |
buf_nl(report);
|
| 562 |
}
|
| 563 |
}
|
| 564 |
buf_appends(report,
|
| 565 |
"=========================================================================\nThe first 20 lines of your message to the remailer follow:\n");
|
| 566 |
buf_rewind(in);
|
| 567 |
for (i = 0; i < 20 && buf_getline(in, test) != -1; i++)
|
| 568 |
buf_cat(report, test), buf_nl(report);
|
| 569 |
|
| 570 |
sendmail(report, REMAILERNAME, testto);
|
| 571 |
err = 0;
|
| 572 |
buf_free(report);
|
| 573 |
} else if (err == 0 && type != MSG_NULL) {
|
| 574 |
err = 1;
|
| 575 |
if (bufieq(to, REMAILERADDR)) /* don't remix to ourselves */
|
| 576 |
remix = 0;
|
| 577 |
if (remix && remixto->length == 0)
|
| 578 |
buf_set(remixto, to);
|
| 579 |
if (remixto->length > 0) {
|
| 580 |
/* check that the remix-to path isn't too long */
|
| 581 |
int remixcount = 1;
|
| 582 |
char *tmp = remixto->data;
|
| 583 |
while ((tmp = strchr(tmp+1, ','))) {
|
| 584 |
remixcount ++;
|
| 585 |
if (remixcount > MAXRANDHOPS) {
|
| 586 |
*tmp = '\0';
|
| 587 |
break;
|
| 588 |
}
|
| 589 |
};
|
| 590 |
}
|
| 591 |
if (remix && !repgp && remixto->length != 0)
|
| 592 |
err = mix_encrypt(type, out, remixto->data, 1, line);
|
| 593 |
if (err != 0) {
|
| 594 |
if (remix == 1 && !repgp)
|
| 595 |
errlog(NOTICE, "Can't remix -- %b\n", line);
|
| 596 |
else {
|
| 597 |
if (remixto->length)
|
| 598 |
err = t1_encrypt(type, out, remixto->data, 0, 0, line);
|
| 599 |
if (err != 0 && repgp)
|
| 600 |
errlog(NOTICE, "Can't repgp -- %b\n", line);
|
| 601 |
else
|
| 602 |
err = mix_pool(out, type, latent * 60);
|
| 603 |
}
|
| 604 |
}
|
| 605 |
}
|
| 606 |
|
| 607 |
buf_free(field);
|
| 608 |
buf_free(content);
|
| 609 |
buf_free(line);
|
| 610 |
buf_free(to);
|
| 611 |
buf_free(remixto);
|
| 612 |
buf_free(newsgroups);
|
| 613 |
buf_free(subject);
|
| 614 |
buf_free(ek);
|
| 615 |
buf_free(ekcast);
|
| 616 |
buf_free(ekdes);
|
| 617 |
buf_free(esub);
|
| 618 |
buf_free(cutmarks);
|
| 619 |
buf_free(temp);
|
| 620 |
buf_free(out);
|
| 621 |
buf_free(header);
|
| 622 |
buf_free(test);
|
| 623 |
buf_free(testto);
|
| 624 |
buf_free(digest);
|
| 625 |
return (err);
|
| 626 |
}
|
Parent Directory
| 
Revision Log