| 1 | /* |
| 2 | ** Copyright 1998 - 2009 Double Precision, Inc. See COPYING for |
| 3 | ** distribution information. |
| 4 | */ |
| 5 | |
| 6 | #include "rfc822.h" |
| 7 | #include <stdio.h> |
| 8 | #include <ctype.h> |
| 9 | #include <string.h> |
| 10 | #include <stdlib.h> |
| 11 | #include <errno.h> |
| 12 | |
| 13 | #include "rfc822hdr.h" |
| 14 | #include "rfc2047.h" |
| 15 | #include "../unicode/unicode.h" |
| 16 | |
| 17 | #if LIBIDN |
| 18 | #include <idna.h> |
| 19 | #include <stringprep.h> |
| 20 | #endif |
| 21 | |
| 22 | |
| 23 | static ssize_t rfc822_decode_rfc2047_atom(const char *str, |
| 24 | size_t cnt, |
| 25 | |
| 26 | void (*callback)(const char *, |
| 27 | const char *, |
| 28 | const char *, |
| 29 | size_t, |
| 30 | void *), |
| 31 | void *ptr); |
| 32 | |
| 33 | static int rfc2047_decode_unicode(const char *text, |
| 34 | const char *chset, |
| 35 | void (*callback)(const char *, size_t, |
| 36 | void *), |
| 37 | void *ptr); |
| 38 | |
| 39 | struct decode_unicode_s { |
| 40 | const char *mychset; |
| 41 | |
| 42 | char *bufptr; |
| 43 | size_t bufsize; |
| 44 | } ; |
| 45 | |
| 46 | static void save_unicode_text(const char *p, size_t l, void *ptr) |
| 47 | { |
| 48 | struct decode_unicode_s *s= |
| 49 | (struct decode_unicode_s *)ptr; |
| 50 | |
| 51 | if (s->bufptr) |
| 52 | memcpy(s->bufptr+s->bufsize, p, l); |
| 53 | |
| 54 | s->bufsize += l; |
| 55 | } |
| 56 | |
| 57 | struct rfc822_display_name_s { |
| 58 | const char *chset; |
| 59 | void (*print_func)(const char *, size_t, void *); |
| 60 | void *ptr; |
| 61 | }; |
| 62 | |
| 63 | static void unknown_charset(const char *chset, |
| 64 | const char *tochset, |
| 65 | void (*print_func)(const char *, size_t, void *), |
| 66 | void *ptr) |
| 67 | { |
| 68 | static const char unknown[]="[unknown character set: "; |
| 69 | |
| 70 | (*print_func)(unknown, sizeof(unknown)-1, ptr); |
| 71 | (*print_func)(chset, strlen(chset), ptr); |
| 72 | (*print_func)(" -> ", 4, ptr); |
| 73 | (*print_func)(tochset, strlen(tochset), ptr); |
| 74 | (*print_func)("]", 1, ptr); |
| 75 | } |
| 76 | |
| 77 | static void rfc822_display_addr_cb(const char *chset, |
| 78 | const char *lang, |
| 79 | const char *content, |
| 80 | size_t cnt, |
| 81 | void *dummy) |
| 82 | { |
| 83 | struct rfc822_display_name_s *s= |
| 84 | (struct rfc822_display_name_s *)dummy; |
| 85 | char *ptr; |
| 86 | char *buf; |
| 87 | |
| 88 | buf=malloc(cnt+1); |
| 89 | |
| 90 | if (!buf) |
| 91 | return; |
| 92 | |
| 93 | memcpy(buf, content, cnt); |
| 94 | buf[cnt]=0; |
| 95 | |
| 96 | ptr=libmail_u_convert_tobuf(buf, chset, s->chset, NULL); |
| 97 | free(buf); |
| 98 | |
| 99 | if (ptr) |
| 100 | { |
| 101 | (*s->print_func)(ptr, strlen(ptr), s->ptr); |
| 102 | free(ptr); |
| 103 | } |
| 104 | else |
| 105 | { |
| 106 | unknown_charset(chset, s->chset, s->print_func, s->ptr); |
| 107 | return; |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | static |
| 112 | int rfc822_display_name_int(const struct rfc822a *rfcp, int index, |
| 113 | const char *chset, |
| 114 | void (*print_func)(const char *, size_t, void *), |
| 115 | void *ptr) |
| 116 | { |
| 117 | struct rfc822_display_name_s s; |
| 118 | const struct rfc822addr *addrs; |
| 119 | |
| 120 | struct rfc822token *i; |
| 121 | int prev_isatom=0; |
| 122 | int isatom=0; |
| 123 | ssize_t rc; |
| 124 | |
| 125 | if (index < 0 || index >= rfcp->naddrs) return 0; |
| 126 | |
| 127 | addrs=rfcp->addrs+index; |
| 128 | |
| 129 | if (!addrs->name) |
| 130 | return rfc822_display_addr(rfcp, index, chset, print_func, ptr); |
| 131 | |
| 132 | if (chset == NULL) |
| 133 | { |
| 134 | s.chset="iso-8859-1"; |
| 135 | } |
| 136 | else |
| 137 | { |
| 138 | s.chset=chset; |
| 139 | } |
| 140 | |
| 141 | s.print_func=print_func; |
| 142 | s.ptr=ptr; |
| 143 | |
| 144 | for (i=addrs->name; i; i=i->next, prev_isatom=isatom) |
| 145 | { |
| 146 | isatom=rfc822_is_atom(i->token); |
| 147 | if (isatom && prev_isatom) |
| 148 | (*print_func)(" ", 1, ptr); |
| 149 | |
| 150 | if (i->token == '"' || i->token == '(') |
| 151 | { |
| 152 | size_t l=i->len; |
| 153 | char *p, *q, *r; |
| 154 | |
| 155 | if (i->token == '(') |
| 156 | { |
| 157 | if (l > 2) |
| 158 | l -= 2; |
| 159 | else |
| 160 | l=0; |
| 161 | } |
| 162 | |
| 163 | p=malloc(l+1); |
| 164 | |
| 165 | if (!p) |
| 166 | return -1; |
| 167 | |
| 168 | if (l) |
| 169 | { |
| 170 | if (i->token == '(') |
| 171 | { |
| 172 | memcpy(p, i->ptr+1, l); |
| 173 | } |
| 174 | else |
| 175 | { |
| 176 | memcpy(p, i->ptr, l); |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | |
| 181 | p[l]=0; |
| 182 | |
| 183 | for (q=r=p; *q; *r++ = *q++) |
| 184 | if (*q == '\\' && q[1]) |
| 185 | ++q; |
| 186 | |
| 187 | *r=0; |
| 188 | |
| 189 | if (chset == NULL) |
| 190 | { |
| 191 | (*print_func)(p, strlen(p), ptr); |
| 192 | } |
| 193 | else if (rfc822_display_hdrvalue("subject", |
| 194 | p, s.chset, |
| 195 | print_func, |
| 196 | NULL, ptr) < 0) |
| 197 | { |
| 198 | free(p); |
| 199 | return -1; |
| 200 | } |
| 201 | free(p); |
| 202 | continue; |
| 203 | } |
| 204 | |
| 205 | if (i->token) |
| 206 | { |
| 207 | char c= (char)i->token; |
| 208 | |
| 209 | (*print_func)(&c, 1, ptr); |
| 210 | continue; |
| 211 | } |
| 212 | |
| 213 | rc=chset ? rfc822_decode_rfc2047_atom(i->ptr, i->len, |
| 214 | rfc822_display_addr_cb, |
| 215 | &s):0; |
| 216 | |
| 217 | if (rc < 0) |
| 218 | return -1; |
| 219 | |
| 220 | if (rc == 0) |
| 221 | { |
| 222 | (*print_func)(i->ptr, i->len, ptr); |
| 223 | continue; |
| 224 | } |
| 225 | |
| 226 | if (i->next && i->next->token == 0) |
| 227 | { |
| 228 | rc=rfc822_decode_rfc2047_atom(i->next->ptr, |
| 229 | i->next->len, |
| 230 | NULL, NULL); |
| 231 | |
| 232 | if (rc < 0) |
| 233 | return -1; |
| 234 | |
| 235 | if (rc > 0) |
| 236 | isatom=0; /* Suppress the separating space */ |
| 237 | } |
| 238 | } |
| 239 | return 0; |
| 240 | } |
| 241 | |
| 242 | int rfc822_display_name(const struct rfc822a *rfcp, int index, |
| 243 | const char *chset, |
| 244 | void (*print_func)(const char *, size_t, void *), |
| 245 | void *ptr) |
| 246 | { |
| 247 | const struct rfc822addr *addrs; |
| 248 | |
| 249 | if (index < 0 || index >= rfcp->naddrs) return 0; |
| 250 | |
| 251 | addrs=rfcp->addrs+index; |
| 252 | |
| 253 | if (!addrs->tokens) |
| 254 | return 0; |
| 255 | |
| 256 | return rfc822_display_name_int(rfcp, index, chset, |
| 257 | print_func, ptr); |
| 258 | } |
| 259 | |
| 260 | char *rfc822_display_name_tobuf(const struct rfc822a *rfcp, int index, |
| 261 | const char *chset) |
| 262 | { |
| 263 | struct decode_unicode_s s; |
| 264 | char *p; |
| 265 | |
| 266 | s.bufptr=0; |
| 267 | s.bufsize=1; |
| 268 | |
| 269 | if (rfc822_display_name(rfcp, index, chset, save_unicode_text, &s) < 0) |
| 270 | return NULL; |
| 271 | s.bufptr=p=malloc(s.bufsize); |
| 272 | if (!p) |
| 273 | return (0); |
| 274 | |
| 275 | s.bufsize=0; |
| 276 | if (rfc822_display_name(rfcp, index, chset, save_unicode_text, &s) < 0) |
| 277 | { |
| 278 | free(s.bufptr); |
| 279 | return (0); |
| 280 | } |
| 281 | save_unicode_text("", 1, &s); |
| 282 | |
| 283 | return (p); |
| 284 | } |
| 285 | |
| 286 | int rfc822_display_namelist(const struct rfc822a *rfcp, |
| 287 | const char *chset, |
| 288 | void (*print_func)(const char *, size_t, void *), |
| 289 | void *ptr) |
| 290 | { |
| 291 | int n; |
| 292 | |
| 293 | for (n=0; n<rfcp->naddrs; n++) |
| 294 | { |
| 295 | if (rfcp->addrs[n].tokens) |
| 296 | { |
| 297 | int err=rfc822_display_name(rfcp, n, chset, |
| 298 | print_func, ptr); |
| 299 | |
| 300 | if (err < 0) |
| 301 | return err; |
| 302 | |
| 303 | (*print_func)("\n", 1, ptr); |
| 304 | } |
| 305 | } |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | int rfc822_display_addr_str(const char *tok, |
| 310 | const char *chset, |
| 311 | void (*print_func)(const char *, size_t, void *), |
| 312 | void *ptr) |
| 313 | { |
| 314 | const char *p; |
| 315 | |
| 316 | p=strchr(tok,'@'); |
| 317 | |
| 318 | if (!p) |
| 319 | p=tok; |
| 320 | else |
| 321 | ++p; |
| 322 | |
| 323 | if (chset != NULL) |
| 324 | { |
| 325 | int err=0; |
| 326 | char *utf8_ptr; |
| 327 | |
| 328 | if (p > tok) |
| 329 | (*print_func)(tok, p-tok, ptr); |
| 330 | |
| 331 | #if LIBIDN |
| 332 | /* |
| 333 | ** Invalid UTF-8 can make libidn go off the deep end. Add |
| 334 | ** padding as a workaround. |
| 335 | */ |
| 336 | { |
| 337 | size_t s=strlen(p)+16; |
| 338 | char *cpy=malloc(s); |
| 339 | |
| 340 | if (!cpy) |
| 341 | return 0; |
| 342 | memset(cpy, 0, s); |
| 343 | strcpy(cpy, p); |
| 344 | |
| 345 | err=idna_to_unicode_8z8z(cpy, &utf8_ptr, 0); |
| 346 | free(cpy); |
| 347 | } |
| 348 | |
| 349 | if (err != IDNA_SUCCESS) |
| 350 | utf8_ptr=0; |
| 351 | #else |
| 352 | utf8_ptr=0; |
| 353 | #endif |
| 354 | |
| 355 | if (utf8_ptr == 0) |
| 356 | (*print_func)(p, strlen(p), ptr); |
| 357 | else |
| 358 | { |
| 359 | char *q=libmail_u_convert_tobuf(utf8_ptr, |
| 360 | "utf-8", |
| 361 | chset, NULL); |
| 362 | if (q) |
| 363 | { |
| 364 | (*print_func)(q, strlen(q), ptr); |
| 365 | free(q); |
| 366 | } |
| 367 | else |
| 368 | { |
| 369 | (*print_func)(p, strlen(p), ptr); |
| 370 | } |
| 371 | free(utf8_ptr); |
| 372 | } |
| 373 | } |
| 374 | else |
| 375 | { |
| 376 | (*print_func)(tok, strlen(tok), ptr); |
| 377 | } |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | int rfc822_display_addr(const struct rfc822a *rfcp, int index, |
| 382 | const char *chset, |
| 383 | void (*print_func)(const char *, size_t, void *), |
| 384 | void *ptr) |
| 385 | { |
| 386 | const struct rfc822addr *addrs; |
| 387 | char *tok; |
| 388 | int rc; |
| 389 | |
| 390 | if (index < 0 || index >= rfcp->naddrs) return 0; |
| 391 | |
| 392 | addrs=rfcp->addrs+index; |
| 393 | |
| 394 | if (!addrs->tokens) |
| 395 | return 0; |
| 396 | |
| 397 | tok=rfc822_gettok(addrs->tokens); |
| 398 | |
| 399 | if (!tok) |
| 400 | return 0; |
| 401 | |
| 402 | rc=rfc822_display_addr_str(tok, chset, print_func, ptr); |
| 403 | free(tok); |
| 404 | return rc; |
| 405 | } |
| 406 | |
| 407 | int rfc2047_print_unicodeaddr(const struct rfc822a *a, |
| 408 | const char *charset, |
| 409 | void (*print_func)(char, void *), |
| 410 | void (*print_separator)(const char *, void *), |
| 411 | void *ptr) |
| 412 | { |
| 413 | const char *sep=NULL; |
| 414 | int n; |
| 415 | |
| 416 | for (n=0; n<a->naddrs; ++n) |
| 417 | { |
| 418 | struct decode_unicode_s nbuf; |
| 419 | const struct rfc822addr *addrs; |
| 420 | size_t i=0; |
| 421 | char *cpbuf; |
| 422 | int need_braces=0; |
| 423 | |
| 424 | addrs=a->addrs+n; |
| 425 | |
| 426 | nbuf.bufptr=0; |
| 427 | nbuf.bufsize=1; |
| 428 | |
| 429 | if (rfc822_display_name_int(a, n, charset, |
| 430 | save_unicode_text, &nbuf) < 0) |
| 431 | return -1; |
| 432 | |
| 433 | nbuf.bufptr=malloc(nbuf.bufsize); |
| 434 | nbuf.bufsize=0; |
| 435 | if (!nbuf.bufptr) |
| 436 | return -1; |
| 437 | |
| 438 | if (rfc822_display_name_int(a, n, charset, |
| 439 | save_unicode_text, &nbuf) < 0) |
| 440 | { |
| 441 | free(nbuf.bufptr); |
| 442 | return -1; |
| 443 | } |
| 444 | nbuf.bufptr[nbuf.bufsize]=0; |
| 445 | |
| 446 | if (addrs->tokens == 0) |
| 447 | { |
| 448 | size_t i; |
| 449 | |
| 450 | if (nbuf.bufsize == 1) /* ; */ |
| 451 | sep=0; |
| 452 | |
| 453 | if (sep) |
| 454 | (*print_separator)(sep, ptr); |
| 455 | |
| 456 | for (i=0; i<nbuf.bufsize; ++i) |
| 457 | (*print_func)(nbuf.bufptr[i], ptr); |
| 458 | free(nbuf.bufptr); |
| 459 | if (nbuf.bufsize > 1) |
| 460 | (*print_separator)(" ", ptr); |
| 461 | sep=NULL; |
| 462 | continue; |
| 463 | } |
| 464 | if (sep) |
| 465 | (*print_separator)(sep, ptr); |
| 466 | |
| 467 | if (!addrs->name) |
| 468 | { |
| 469 | nbuf.bufsize=0; |
| 470 | nbuf.bufptr[0]=0; |
| 471 | } |
| 472 | |
| 473 | for (i=0; i<nbuf.bufsize; i++) |
| 474 | if (strchr(RFC822_SPECIALS, nbuf.bufptr[i])) |
| 475 | break; |
| 476 | |
| 477 | cpbuf=libmail_u_convert_tobuf(nbuf.bufptr, "utf-8", charset, |
| 478 | NULL); |
| 479 | |
| 480 | if (!cpbuf) |
| 481 | { |
| 482 | const char *errmsg="\"(unknown character set)\""; |
| 483 | |
| 484 | while (*errmsg) |
| 485 | (*print_func)(*errmsg++, ptr); |
| 486 | need_braces=1; |
| 487 | } |
| 488 | else |
| 489 | { |
| 490 | if (i < nbuf.bufsize) |
| 491 | { |
| 492 | (*print_func)('"', ptr); |
| 493 | |
| 494 | for (i=0; cpbuf[i]; ++i) |
| 495 | { |
| 496 | if (cpbuf[i] == '\\' || |
| 497 | cpbuf[i] == '"') |
| 498 | (*print_func)('\\', ptr); |
| 499 | (*print_func)(cpbuf[i], ptr); |
| 500 | } |
| 501 | (*print_func)('"', ptr); |
| 502 | need_braces=1; |
| 503 | } |
| 504 | else |
| 505 | { |
| 506 | for (i=0; cpbuf[i]; ++i) |
| 507 | { |
| 508 | need_braces=1; |
| 509 | (*print_func)(cpbuf[i], ptr); |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | free(cpbuf); |
| 514 | } |
| 515 | free(nbuf.bufptr); |
| 516 | |
| 517 | if (need_braces) |
| 518 | { |
| 519 | (*print_func)(' ', ptr); |
| 520 | (*print_func)('<', ptr); |
| 521 | } |
| 522 | |
| 523 | nbuf.bufptr=0; |
| 524 | nbuf.bufsize=1; |
| 525 | |
| 526 | if (rfc822_display_addr(a, n, charset, |
| 527 | save_unicode_text, &nbuf) < 0) |
| 528 | return -1; |
| 529 | |
| 530 | nbuf.bufptr=malloc(nbuf.bufsize); |
| 531 | nbuf.bufsize=0; |
| 532 | if (!nbuf.bufptr) |
| 533 | return -1; |
| 534 | |
| 535 | if (rfc822_display_addr(a, n, charset, |
| 536 | save_unicode_text, &nbuf) < 0) |
| 537 | { |
| 538 | free(nbuf.bufptr); |
| 539 | return -1; |
| 540 | } |
| 541 | for (i=0; i<nbuf.bufsize; i++) |
| 542 | (*print_func)(nbuf.bufptr[i], ptr); |
| 543 | |
| 544 | free(nbuf.bufptr); |
| 545 | |
| 546 | if (need_braces) |
| 547 | (*print_func)('>', ptr); |
| 548 | sep=", "; |
| 549 | } |
| 550 | |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | static int rfc2047_print_unicode_addrstr(const char *addrheader, |
| 555 | const char *charset, |
| 556 | void (*print_func)(char, void *), |
| 557 | void (*print_separator)(const char *, void *), |
| 558 | void (*err_func)(const char *, int, void *), |
| 559 | void *ptr) |
| 560 | { |
| 561 | struct rfc822t *t; |
| 562 | struct rfc822a *a; |
| 563 | int rc; |
| 564 | |
| 565 | t=rfc822t_alloc_new(addrheader, err_func, ptr); |
| 566 | |
| 567 | if (!t) |
| 568 | return -1; |
| 569 | |
| 570 | a=rfc822a_alloc(t); |
| 571 | |
| 572 | if (!a) |
| 573 | { |
| 574 | rfc822t_free(t); |
| 575 | return -1; |
| 576 | } |
| 577 | rc=rfc2047_print_unicodeaddr(a, charset, print_func, print_separator, |
| 578 | ptr); |
| 579 | rfc822a_free(a); |
| 580 | rfc822t_free(t); |
| 581 | return (rc); |
| 582 | } |
| 583 | |
| 584 | struct rfc822_display_hdrvalue_s { |
| 585 | |
| 586 | void (*display_func)(const char *, size_t, void *); |
| 587 | void *ptr; |
| 588 | }; |
| 589 | |
| 590 | static void rfc822_display_hdrvalue_print_func(char c, void *ptr) |
| 591 | { |
| 592 | struct rfc822_display_hdrvalue_s *s= |
| 593 | (struct rfc822_display_hdrvalue_s *)ptr; |
| 594 | |
| 595 | (*s->display_func)(&c, 1, s->ptr); |
| 596 | } |
| 597 | |
| 598 | static void rfc822_display_hdrvalue_print_separator(const char *cp, void *ptr) |
| 599 | { |
| 600 | struct rfc822_display_hdrvalue_s *s= |
| 601 | (struct rfc822_display_hdrvalue_s *)ptr; |
| 602 | |
| 603 | (*s->display_func)(cp, strlen(cp), s->ptr); |
| 604 | (*s->display_func)("", 0, s->ptr); /* Signal wrap point */ |
| 605 | } |
| 606 | |
| 607 | int rfc822_display_hdrvalue(const char *hdrname, |
| 608 | const char *hdrvalue, |
| 609 | const char *charset, |
| 610 | void (*display_func)(const char *, size_t, |
| 611 | void *), |
| 612 | void (*err_func)(const char *, int, void *), |
| 613 | void *ptr) |
| 614 | { |
| 615 | struct rfc822_display_hdrvalue_s s; |
| 616 | |
| 617 | s.display_func=display_func; |
| 618 | s.ptr=ptr; |
| 619 | |
| 620 | if (rfc822hdr_is_addr(hdrname)) |
| 621 | { |
| 622 | return rfc2047_print_unicode_addrstr(hdrvalue, |
| 623 | charset, |
| 624 | rfc822_display_hdrvalue_print_func, |
| 625 | rfc822_display_hdrvalue_print_separator, |
| 626 | NULL, |
| 627 | &s); |
| 628 | } |
| 629 | |
| 630 | return rfc2047_decode_unicode(hdrvalue, charset, display_func, ptr); |
| 631 | } |
| 632 | |
| 633 | struct rfc822_display_hdrvalue_tobuf_s { |
| 634 | void (*orig_err_func)(const char *, int, void *); |
| 635 | void *orig_ptr; |
| 636 | |
| 637 | size_t cnt; |
| 638 | char *buf; |
| 639 | }; |
| 640 | |
| 641 | static void rfc822_display_hdrvalue_tobuf_cnt(const char *ptr, size_t cnt, |
| 642 | void *s) |
| 643 | { |
| 644 | ((struct rfc822_display_hdrvalue_tobuf_s *)s)->cnt += cnt; |
| 645 | } |
| 646 | |
| 647 | static void rfc822_display_hdrvalue_tobuf_save(const char *ptr, size_t cnt, |
| 648 | void *s) |
| 649 | { |
| 650 | if (cnt) |
| 651 | memcpy(((struct rfc822_display_hdrvalue_tobuf_s *)s)->buf, |
| 652 | ptr, cnt); |
| 653 | |
| 654 | ((struct rfc822_display_hdrvalue_tobuf_s *)s)->buf += cnt; |
| 655 | } |
| 656 | |
| 657 | static void rfc822_display_hdrvalue_tobuf_errfunc(const char *ptr, int index, |
| 658 | void *s) |
| 659 | { |
| 660 | void (*f)(const char *, int, void *)= |
| 661 | ((struct rfc822_display_hdrvalue_tobuf_s *)s)->orig_err_func; |
| 662 | |
| 663 | if (f) |
| 664 | f(ptr, index, |
| 665 | ((struct rfc822_display_hdrvalue_tobuf_s *)s)->orig_ptr); |
| 666 | } |
| 667 | |
| 668 | char *rfc822_display_addr_tobuf(const struct rfc822a *rfcp, int index, |
| 669 | const char *chset) |
| 670 | { |
| 671 | struct rfc822_display_hdrvalue_tobuf_s nbuf; |
| 672 | int errcode; |
| 673 | char *ptr; |
| 674 | |
| 675 | nbuf.buf=0; |
| 676 | nbuf.cnt=1; |
| 677 | |
| 678 | errcode=rfc822_display_addr(rfcp, index, chset, |
| 679 | rfc822_display_hdrvalue_tobuf_cnt, &nbuf); |
| 680 | |
| 681 | if (errcode < 0) |
| 682 | return NULL; |
| 683 | |
| 684 | ptr=nbuf.buf=malloc(nbuf.cnt); |
| 685 | nbuf.cnt=0; |
| 686 | if (!ptr) |
| 687 | return NULL; |
| 688 | |
| 689 | errcode=rfc822_display_addr(rfcp, index, chset, |
| 690 | rfc822_display_hdrvalue_tobuf_save, &nbuf); |
| 691 | |
| 692 | if (errcode < 0) |
| 693 | { |
| 694 | free(nbuf.buf); |
| 695 | return NULL; |
| 696 | } |
| 697 | *nbuf.buf=0; |
| 698 | return ptr; |
| 699 | } |
| 700 | |
| 701 | char *rfc822_display_hdrvalue_tobuf(const char *hdrname, |
| 702 | const char *hdrvalue, |
| 703 | const char *charset, |
| 704 | void (*err_func)(const char *, int, |
| 705 | void *), |
| 706 | void *ptr) |
| 707 | { |
| 708 | struct rfc822_display_hdrvalue_tobuf_s s; |
| 709 | int errcode; |
| 710 | char *bufptr; |
| 711 | |
| 712 | s.orig_err_func=err_func; |
| 713 | s.orig_ptr=ptr; |
| 714 | s.cnt=1; |
| 715 | |
| 716 | errcode=rfc822_display_hdrvalue(hdrname, hdrvalue, charset, |
| 717 | rfc822_display_hdrvalue_tobuf_cnt, |
| 718 | rfc822_display_hdrvalue_tobuf_errfunc, |
| 719 | &s); |
| 720 | |
| 721 | if (errcode < 0) |
| 722 | return NULL; |
| 723 | |
| 724 | bufptr=s.buf=malloc(s.cnt); |
| 725 | |
| 726 | if (!bufptr) |
| 727 | return NULL; |
| 728 | |
| 729 | errcode=rfc822_display_hdrvalue(hdrname, hdrvalue, charset, |
| 730 | rfc822_display_hdrvalue_tobuf_save, |
| 731 | rfc822_display_hdrvalue_tobuf_errfunc, |
| 732 | &s); |
| 733 | if (errcode) |
| 734 | { |
| 735 | free(bufptr); |
| 736 | return NULL; |
| 737 | } |
| 738 | *s.buf=0; |
| 739 | return bufptr; |
| 740 | } |
| 741 | |
| 742 | char *rfc822_display_addr_str_tobuf(const char *tok, const char *chset) |
| 743 | { |
| 744 | struct rfc822_display_hdrvalue_tobuf_s s; |
| 745 | int errcode; |
| 746 | char *bufptr; |
| 747 | |
| 748 | s.cnt=1; |
| 749 | |
| 750 | errcode=rfc822_display_addr_str(tok, chset, |
| 751 | rfc822_display_hdrvalue_tobuf_cnt, |
| 752 | &s); |
| 753 | |
| 754 | if (errcode < 0) |
| 755 | return NULL; |
| 756 | |
| 757 | bufptr=s.buf=malloc(s.cnt); |
| 758 | |
| 759 | if (!bufptr) |
| 760 | return NULL; |
| 761 | |
| 762 | errcode=rfc822_display_addr_str(tok, chset, |
| 763 | rfc822_display_hdrvalue_tobuf_save, |
| 764 | &s); |
| 765 | if (errcode < 0) |
| 766 | { |
| 767 | free(bufptr); |
| 768 | return NULL; |
| 769 | } |
| 770 | *s.buf=0; |
| 771 | return bufptr; |
| 772 | } |
| 773 | |
| 774 | |
| 775 | static const char xdigit[]="0123456789ABCDEFabcdef"; |
| 776 | |
| 777 | static const unsigned char decode64tab[]={ |
| 778 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 779 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 780 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 62, 0, 0, 0, 63, |
| 781 | 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 0, 0, 0, 99, 0, 0, |
| 782 | 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, |
| 783 | 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 0, 0, 0, 0, 0, |
| 784 | 0, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, |
| 785 | 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 0, 0, 0, 0, 0, |
| 786 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 787 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 788 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 789 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 790 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 791 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 792 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 793 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 |
| 794 | }; |
| 795 | |
| 796 | static int nyb(int c) |
| 797 | { |
| 798 | const char *p; |
| 799 | int n; |
| 800 | |
| 801 | p=strchr(xdigit, c); |
| 802 | |
| 803 | if (!p) |
| 804 | return 0; |
| 805 | |
| 806 | n=p-xdigit; |
| 807 | |
| 808 | if (n > 15) |
| 809 | n -= 6; |
| 810 | |
| 811 | return n; |
| 812 | } |
| 813 | |
| 814 | static size_t decodebase64(const char *ptr, size_t cnt, |
| 815 | char *dec_buf) |
| 816 | { |
| 817 | size_t i, j; |
| 818 | char a,b,c; |
| 819 | size_t k; |
| 820 | |
| 821 | i=cnt / 4; |
| 822 | i=i*4; |
| 823 | k=0; |
| 824 | for (j=0; j<i; j += 4) |
| 825 | { |
| 826 | int w=decode64tab[(int)(unsigned char)ptr[j]]; |
| 827 | int x=decode64tab[(int)(unsigned char)ptr[j+1]]; |
| 828 | int y=decode64tab[(int)(unsigned char)ptr[j+2]]; |
| 829 | int z=decode64tab[(int)(unsigned char)ptr[j+3]]; |
| 830 | |
| 831 | a= (w << 2) | (x >> 4); |
| 832 | b= (x << 4) | (y >> 2); |
| 833 | c= (y << 6) | z; |
| 834 | dec_buf[k++]=a; |
| 835 | if ( ptr[j+2] != '=') |
| 836 | dec_buf[k++]=b; |
| 837 | if ( ptr[j+3] != '=') |
| 838 | dec_buf[k++]=c; |
| 839 | } |
| 840 | return (k); |
| 841 | } |
| 842 | |
| 843 | |
| 844 | static ssize_t rfc822_decode_rfc2047_atom(const char *str, |
| 845 | size_t cnt, |
| 846 | |
| 847 | void (*callback)(const char *, |
| 848 | const char *, |
| 849 | const char *, |
| 850 | size_t, |
| 851 | void *), |
| 852 | void *ptr) |
| 853 | { |
| 854 | const char *chset_str; |
| 855 | const char *enc_str; |
| 856 | const char *content_str; |
| 857 | |
| 858 | char *chset; |
| 859 | char *lang; |
| 860 | |
| 861 | char *content; |
| 862 | |
| 863 | size_t i; |
| 864 | size_t j; |
| 865 | size_t k; |
| 866 | |
| 867 | size_t content_len; |
| 868 | |
| 869 | if (cnt < 2 || str[0] != '=' || str[1] != '?') |
| 870 | return 0; |
| 871 | |
| 872 | chset_str=str+2; |
| 873 | |
| 874 | for (i=2; i<cnt; i++) |
| 875 | if (str[i] == '?') |
| 876 | break; |
| 877 | |
| 878 | if (i >= cnt) |
| 879 | return 0; |
| 880 | |
| 881 | enc_str= str + ++i; |
| 882 | |
| 883 | for (; i < cnt; i++) |
| 884 | if (str[i] == '?') |
| 885 | break; |
| 886 | |
| 887 | if (i >= cnt) |
| 888 | return 0; |
| 889 | |
| 890 | content_str= str + ++i; |
| 891 | |
| 892 | while (1) |
| 893 | { |
| 894 | if (cnt-i < 2) |
| 895 | return 0; |
| 896 | |
| 897 | if (str[i] == '?' && str[i+1] == '=') |
| 898 | break; |
| 899 | ++i; |
| 900 | } |
| 901 | |
| 902 | for (j=0; chset_str[j] != '?'; ++j) |
| 903 | ; |
| 904 | |
| 905 | chset=malloc(j+1); |
| 906 | |
| 907 | if (!chset) |
| 908 | return -1; |
| 909 | |
| 910 | memcpy(chset, chset_str, j); |
| 911 | chset[j]=0; |
| 912 | |
| 913 | lang=strchr(chset, '*'); /* RFC 2231 */ |
| 914 | |
| 915 | if (lang) |
| 916 | *lang++ = 0; |
| 917 | else |
| 918 | lang=""; |
| 919 | |
| 920 | content_len=str + i - content_str; |
| 921 | |
| 922 | content=malloc(content_len+1); |
| 923 | |
| 924 | if (!content) |
| 925 | { |
| 926 | free(chset); |
| 927 | return -1; |
| 928 | } |
| 929 | |
| 930 | switch (*enc_str) { |
| 931 | case 'q': |
| 932 | case 'Q': |
| 933 | |
| 934 | k=0; |
| 935 | for (j=0; j<content_len; j++) |
| 936 | { |
| 937 | char c; |
| 938 | |
| 939 | if (content_str[j] == '=' && i-j >= 3) |
| 940 | { |
| 941 | content[k]=(char)(nyb(content_str[j+1])*16 + |
| 942 | nyb(content_str[j+2])); |
| 943 | ++k; |
| 944 | j += 2; |
| 945 | continue; |
| 946 | } |
| 947 | |
| 948 | c=content_str[j]; |
| 949 | if (c == '_') |
| 950 | c=' '; |
| 951 | content[k]=c; |
| 952 | ++k; |
| 953 | } |
| 954 | break; |
| 955 | |
| 956 | case 'b': |
| 957 | case 'B': |
| 958 | k=decodebase64(content_str, content_len, content); |
| 959 | break; |
| 960 | default: |
| 961 | free(content); |
| 962 | free(chset); |
| 963 | return (0); |
| 964 | } |
| 965 | |
| 966 | if (callback) |
| 967 | (*callback)(chset, lang, content, k, ptr); |
| 968 | free(content); |
| 969 | free(chset); |
| 970 | return i + 2; |
| 971 | } |
| 972 | |
| 973 | int rfc2047_decoder(const char *text, |
| 974 | void (*callback)(const char *chset, |
| 975 | const char *lang, |
| 976 | const char *content, |
| 977 | size_t cnt, |
| 978 | void *dummy), |
| 979 | void *ptr) |
| 980 | { |
| 981 | ssize_t rc; |
| 982 | |
| 983 | while (text && *text) |
| 984 | { |
| 985 | size_t i; |
| 986 | |
| 987 | for (i=0; text[i]; i++) |
| 988 | { |
| 989 | if (text[i] == '=' && text[i+1] == '?') |
| 990 | break; |
| 991 | } |
| 992 | |
| 993 | if (i) |
| 994 | (*callback)("iso-8859-1", "", text, i, ptr); |
| 995 | |
| 996 | text += i; |
| 997 | |
| 998 | if (!*text) |
| 999 | continue; |
| 1000 | |
| 1001 | rc=rfc822_decode_rfc2047_atom(text, strlen(text), |
| 1002 | callback, ptr); |
| 1003 | |
| 1004 | if (rc < 0) |
| 1005 | return -1; |
| 1006 | |
| 1007 | if (rc == 0) |
| 1008 | { |
| 1009 | (*callback)("iso-8859-1", "", text, 2, ptr); |
| 1010 | text += 2; |
| 1011 | continue; |
| 1012 | } |
| 1013 | |
| 1014 | text += rc; |
| 1015 | |
| 1016 | for (i=0; text[i]; i++) |
| 1017 | { |
| 1018 | if (strchr(" \t\r\n", text[i]) == NULL) |
| 1019 | break; |
| 1020 | } |
| 1021 | |
| 1022 | if (text[i] != '=' || text[i+1] != '?') |
| 1023 | continue; |
| 1024 | |
| 1025 | rc=rfc822_decode_rfc2047_atom(text+i, strlen(text+i), NULL, |
| 1026 | NULL); |
| 1027 | |
| 1028 | if (rc < 0) |
| 1029 | return -1; |
| 1030 | if (rc > 0) |
| 1031 | text += i; |
| 1032 | } |
| 1033 | |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | static int rfc2047_decode_unicode(const char *text, |
| 1038 | const char *chset, |
| 1039 | void (*callback)(const char *, size_t, |
| 1040 | void *), |
| 1041 | void *ptr) |
| 1042 | { |
| 1043 | struct rfc822_display_name_s s; |
| 1044 | |
| 1045 | s.chset=chset; |
| 1046 | s.print_func=callback; |
| 1047 | s.ptr=ptr; |
| 1048 | |
| 1049 | return rfc2047_decoder(text, rfc822_display_addr_cb, &s); |
| 1050 | } |