1 /* $OpenBSD: fetch.c,v 1.162 2017/03/02 09:29:53 sthen Exp $ */ 2 /* $NetBSD: fetch.c,v 1.14 1997/08/18 10:20:20 lukem Exp $ */ 3 4 /*- 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason Thorpe and Luke Mewburn. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * FTP User Program -- Command line file retrieval 35 */ 36 37 #include <sys/types.h> 38 #include <sys/socket.h> 39 #include <sys/stat.h> 40 41 #include <netinet/in.h> 42 43 #include <arpa/ftp.h> 44 #include <arpa/inet.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <libgen.h> 49 #include <netdb.h> 50 #include <fcntl.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #include <stdarg.h> 54 #include <errno.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <util.h> 59 #include <resolv.h> 60 61 #ifndef NOSSL 62 #include <tls.h> 63 #else /* !NOSSL */ 64 struct tls; 65 #endif /* !NOSSL */ 66 67 #include "ftp_var.h" 68 #include "cmds.h" 69 70 static int url_get(const char *, const char *, const char *, int); 71 void aborthttp(int); 72 void abortfile(int); 73 char hextochar(const char *); 74 char *urldecode(const char *); 75 char *recode_credentials(const char *_userinfo); 76 int ftp_printf(FILE *, struct tls *, const char *, ...) __attribute__((format(printf, 3, 4))); 77 char *ftp_readline(FILE *, struct tls *, size_t *); 78 size_t ftp_read(FILE *, struct tls *, char *, size_t); 79 #ifndef NOSSL 80 int proxy_connect(int, char *, char *); 81 int SSL_vprintf(struct tls *, const char *, va_list); 82 char *SSL_readline(struct tls *, size_t *); 83 #endif /* !NOSSL */ 84 85 #define FTP_URL "ftp://" /* ftp URL prefix */ 86 #define HTTP_URL "http://" /* http URL prefix */ 87 #define HTTPS_URL "https://" /* https URL prefix */ 88 #define FILE_URL "file:" /* file URL prefix */ 89 #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */ 90 #define HTTP_PROXY "http_proxy" /* env var with http proxy location */ 91 92 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 93 94 static const char at_encoding_warning[] = 95 "Extra `@' characters in usernames and passwords should be encoded as %%40"; 96 97 jmp_buf httpabort; 98 99 static int redirect_loop; 100 101 /* 102 * Determine whether the character needs encoding, per RFC1738: 103 * - No corresponding graphic US-ASCII. 104 * - Unsafe characters. 105 */ 106 static int 107 unsafe_char(const char *c0) 108 { 109 const char *unsafe_chars = " <>\"#{}|\\^~[]`"; 110 const unsigned char *c = (const unsigned char *)c0; 111 112 /* 113 * No corresponding graphic US-ASCII. 114 * Control characters and octets not used in US-ASCII. 115 */ 116 return (iscntrl(*c) || !isascii(*c) || 117 118 /* 119 * Unsafe characters. 120 * '%' is also unsafe, if is not followed by two 121 * hexadecimal digits. 122 */ 123 strchr(unsafe_chars, *c) != NULL || 124 (*c == '%' && (!isxdigit(*++c) || !isxdigit(*++c)))); 125 } 126 127 /* 128 * Encode given URL, per RFC1738. 129 * Allocate and return string to the caller. 130 */ 131 static char * 132 url_encode(const char *path) 133 { 134 size_t i, length, new_length; 135 char *epath, *epathp; 136 137 length = new_length = strlen(path); 138 139 /* 140 * First pass: 141 * Count unsafe characters, and determine length of the 142 * final URL. 143 */ 144 for (i = 0; i < length; i++) 145 if (unsafe_char(path + i)) 146 new_length += 2; 147 148 epath = epathp = malloc(new_length + 1); /* One more for '\0'. */ 149 if (epath == NULL) 150 err(1, "Can't allocate memory for URL encoding"); 151 152 /* 153 * Second pass: 154 * Encode, and copy final URL. 155 */ 156 for (i = 0; i < length; i++) 157 if (unsafe_char(path + i)) { 158 snprintf(epathp, 4, "%%" "%02x", 159 (unsigned char)path[i]); 160 epathp += 3; 161 } else 162 *(epathp++) = path[i]; 163 164 *epathp = '\0'; 165 return (epath); 166 } 167 168 /* ARGSUSED */ 169 static void 170 tooslow(int signo) 171 { 172 dprintf(STDERR_FILENO, "%s: connect taking too long\n", __progname); 173 _exit(2); 174 } 175 176 /* 177 * Retrieve URL, via the proxy in $proxyvar if necessary. 178 * Modifies the string argument given. 179 * Returns -1 on failure, 0 on success 180 */ 181 static int 182 url_get(const char *origline, const char *proxyenv, const char *outfile, int lastfile) 183 { 184 char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST], *cp, *portnum, *path, ststr[4]; 185 char *hosttail, *cause = "unknown", *newline, *host, *port, *buf = NULL; 186 char *epath, *redirurl, *loctail, *h, *p; 187 int error, i, isftpurl = 0, isfileurl = 0, isredirect = 0, rval = -1; 188 struct addrinfo hints, *res0, *res; 189 const char * volatile savefile; 190 char * volatile proxyurl = NULL; 191 char *credentials = NULL; 192 volatile int s = -1, out; 193 volatile sig_t oldintr, oldinti; 194 FILE *fin = NULL; 195 off_t hashbytes; 196 const char *errstr; 197 ssize_t len, wlen; 198 char *proxyhost = NULL; 199 #ifndef NOSSL 200 char *sslpath = NULL, *sslhost = NULL; 201 char *full_host = NULL; 202 const char *scheme; 203 int ishttpurl = 0, ishttpsurl = 0; 204 #endif /* !NOSSL */ 205 #ifndef SMALL 206 char *locbase; 207 struct addrinfo *ares = NULL; 208 #endif 209 struct tls *tls = NULL; 210 int status; 211 int save_errno; 212 const size_t buflen = 128 * 1024; 213 214 direction = "received"; 215 216 newline = strdup(origline); 217 if (newline == NULL) 218 errx(1, "Can't allocate memory to parse URL"); 219 if (strncasecmp(newline, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 220 host = newline + sizeof(HTTP_URL) - 1; 221 #ifndef SMALL 222 ishttpurl = 1; 223 scheme = HTTP_URL; 224 #endif /* !SMALL */ 225 } else if (strncasecmp(newline, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 226 host = newline + sizeof(FTP_URL) - 1; 227 isftpurl = 1; 228 #ifndef SMALL 229 scheme = FTP_URL; 230 #endif /* !SMALL */ 231 } else if (strncasecmp(newline, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 232 host = newline + sizeof(FILE_URL) - 1; 233 isfileurl = 1; 234 #ifndef NOSSL 235 scheme = FILE_URL; 236 } else if (strncasecmp(newline, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0) { 237 host = newline + sizeof(HTTPS_URL) - 1; 238 ishttpsurl = 1; 239 scheme = HTTPS_URL; 240 #endif /* !NOSSL */ 241 } else 242 errx(1, "url_get: Invalid URL '%s'", newline); 243 244 if (isfileurl) { 245 path = host; 246 } else { 247 path = strchr(host, '/'); /* Find path */ 248 if (EMPTYSTRING(path)) { 249 if (outfile) { /* No slash, but */ 250 path=strchr(host,'\0'); /* we have outfile. */ 251 goto noslash; 252 } 253 if (isftpurl) 254 goto noftpautologin; 255 warnx("No `/' after host (use -o): %s", origline); 256 goto cleanup_url_get; 257 } 258 *path++ = '\0'; 259 if (EMPTYSTRING(path) && !outfile) { 260 if (isftpurl) 261 goto noftpautologin; 262 warnx("No filename after host (use -o): %s", origline); 263 goto cleanup_url_get; 264 } 265 } 266 267 noslash: 268 269 #ifndef NOSSL 270 /* 271 * Look for auth header in host, since now host does not 272 * contain the path. Basic auth from RFC 2617, valid 273 * characters for path are in RFC 3986 section 3.3. 274 */ 275 if (proxyenv == NULL && (ishttpurl || ishttpsurl)) { 276 if ((p = strchr(host, '@')) != NULL) { 277 *p = '\0'; 278 credentials = recode_credentials(host); 279 host = p + 1; 280 } 281 } 282 #endif /* NOSSL */ 283 284 if (outfile) 285 savefile = outfile; 286 else { 287 if (path[strlen(path) - 1] == '/') /* Consider no file */ 288 savefile = NULL; /* after dir invalid. */ 289 else 290 savefile = basename(path); 291 } 292 293 if (EMPTYSTRING(savefile)) { 294 if (isftpurl) 295 goto noftpautologin; 296 warnx("No filename after directory (use -o): %s", origline); 297 goto cleanup_url_get; 298 } 299 300 #ifndef SMALL 301 if (resume && pipeout) { 302 warnx("can't append to stdout"); 303 goto cleanup_url_get; 304 } 305 #endif /* !SMALL */ 306 307 if (!isfileurl && proxyenv != NULL) { /* use proxy */ 308 #ifndef NOSSL 309 if (ishttpsurl) { 310 sslpath = strdup(path); 311 sslhost = strdup(host); 312 if (! sslpath || ! sslhost) 313 errx(1, "Can't allocate memory for https path/host."); 314 } 315 #endif /* !NOSSL */ 316 proxyhost = strdup(host); 317 if (proxyhost == NULL) 318 errx(1, "Can't allocate memory for proxy host."); 319 proxyurl = strdup(proxyenv); 320 if (proxyurl == NULL) 321 errx(1, "Can't allocate memory for proxy URL."); 322 if (strncasecmp(proxyurl, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 323 host = proxyurl + sizeof(HTTP_URL) - 1; 324 else if (strncasecmp(proxyurl, FTP_URL, sizeof(FTP_URL) - 1) == 0) 325 host = proxyurl + sizeof(FTP_URL) - 1; 326 else { 327 warnx("Malformed proxy URL: %s", proxyenv); 328 goto cleanup_url_get; 329 } 330 if (EMPTYSTRING(host)) { 331 warnx("Malformed proxy URL: %s", proxyenv); 332 goto cleanup_url_get; 333 } 334 if (*--path == '\0') 335 *path = '/'; /* add / back to real path */ 336 path = strchr(host, '/'); /* remove trailing / on host */ 337 if (!EMPTYSTRING(path)) 338 *path++ = '\0'; /* i guess this ++ is useless */ 339 340 path = strchr(host, '@'); /* look for credentials in proxy */ 341 if (!EMPTYSTRING(path)) { 342 *path = '\0'; 343 if (strchr(host, ':') == NULL) { 344 warnx("Malformed proxy URL: %s", proxyenv); 345 goto cleanup_url_get; 346 } 347 credentials = recode_credentials(host); 348 *path = '@'; /* restore @ in proxyurl */ 349 350 /* 351 * This removes the password from proxyurl, 352 * filling with stars 353 */ 354 for (host = 1 + strchr(proxyurl + 5, ':'); *host != '@'; 355 host++) 356 *host = '*'; 357 358 host = path + 1; 359 } 360 361 path = newline; 362 } 363 364 if (isfileurl) { 365 struct stat st; 366 367 s = open(path, O_RDONLY); 368 if (s == -1) { 369 warn("Can't open file %s", path); 370 goto cleanup_url_get; 371 } 372 373 if (fstat(s, &st) == -1) 374 filesize = -1; 375 else 376 filesize = st.st_size; 377 378 /* Open the output file. */ 379 if (!pipeout) { 380 #ifndef SMALL 381 if (resume) 382 out = open(savefile, O_CREAT | O_WRONLY | 383 O_APPEND, 0666); 384 385 else 386 #endif /* !SMALL */ 387 out = open(savefile, O_CREAT | O_WRONLY | 388 O_TRUNC, 0666); 389 if (out < 0) { 390 warn("Can't open %s", savefile); 391 goto cleanup_url_get; 392 } 393 } else 394 out = fileno(stdout); 395 396 #ifndef SMALL 397 if (resume) { 398 if (fstat(out, &st) == -1) { 399 warn("Can't fstat %s", savefile); 400 goto cleanup_url_get; 401 } 402 if (lseek(s, st.st_size, SEEK_SET) == -1) { 403 warn("Can't lseek %s", path); 404 goto cleanup_url_get; 405 } 406 restart_point = st.st_size; 407 } 408 #endif /* !SMALL */ 409 410 /* Trap signals */ 411 oldintr = NULL; 412 oldinti = NULL; 413 if (setjmp(httpabort)) { 414 if (oldintr) 415 (void)signal(SIGINT, oldintr); 416 if (oldinti) 417 (void)signal(SIGINFO, oldinti); 418 goto cleanup_url_get; 419 } 420 oldintr = signal(SIGINT, abortfile); 421 422 bytes = 0; 423 hashbytes = mark; 424 progressmeter(-1, path); 425 426 if ((buf = malloc(buflen)) == NULL) 427 errx(1, "Can't allocate memory for transfer buffer"); 428 429 /* Finally, suck down the file. */ 430 i = 0; 431 oldinti = signal(SIGINFO, psummary); 432 while ((len = read(s, buf, buflen)) > 0) { 433 bytes += len; 434 for (cp = buf; len > 0; len -= i, cp += i) { 435 if ((i = write(out, cp, len)) == -1) { 436 warn("Writing %s", savefile); 437 signal(SIGINFO, oldinti); 438 goto cleanup_url_get; 439 } 440 else if (i == 0) 441 break; 442 } 443 if (hash && !progress) { 444 while (bytes >= hashbytes) { 445 (void)putc('#', ttyout); 446 hashbytes += mark; 447 } 448 (void)fflush(ttyout); 449 } 450 } 451 signal(SIGINFO, oldinti); 452 if (hash && !progress && bytes > 0) { 453 if (bytes < mark) 454 (void)putc('#', ttyout); 455 (void)putc('\n', ttyout); 456 (void)fflush(ttyout); 457 } 458 if (len != 0) { 459 warn("Reading from file"); 460 goto cleanup_url_get; 461 } 462 progressmeter(1, NULL); 463 if (verbose) 464 ptransfer(0); 465 (void)signal(SIGINT, oldintr); 466 467 rval = 0; 468 goto cleanup_url_get; 469 } 470 471 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 472 (hosttail[1] == '\0' || hosttail[1] == ':')) { 473 host++; 474 *hosttail++ = '\0'; 475 #ifndef SMALL 476 if (asprintf(&full_host, "[%s]", host) == -1) 477 errx(1, "Cannot allocate memory for hostname"); 478 #endif /* !SMALL */ 479 } else 480 hosttail = host; 481 482 portnum = strrchr(hosttail, ':'); /* find portnum */ 483 if (portnum != NULL) 484 *portnum++ = '\0'; 485 #ifndef NOSSL 486 port = portnum ? portnum : (ishttpsurl ? httpsport : httpport); 487 #else /* !NOSSL */ 488 port = portnum ? portnum : httpport; 489 #endif /* !NOSSL */ 490 491 #ifndef SMALL 492 if (full_host == NULL) 493 if ((full_host = strdup(host)) == NULL) 494 errx(1, "Cannot allocate memory for hostname"); 495 if (debug) 496 fprintf(ttyout, "host %s, port %s, path %s, " 497 "save as %s, auth %s.\n", host, port, path, 498 savefile, credentials ? credentials : "none"); 499 #endif /* !SMALL */ 500 501 memset(&hints, 0, sizeof(hints)); 502 hints.ai_family = family; 503 hints.ai_socktype = SOCK_STREAM; 504 error = getaddrinfo(host, port, &hints, &res0); 505 /* 506 * If the services file is corrupt/missing, fall back 507 * on our hard-coded defines. 508 */ 509 if (error == EAI_SERVICE && port == httpport) { 510 snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT); 511 error = getaddrinfo(host, pbuf, &hints, &res0); 512 #ifndef NOSSL 513 } else if (error == EAI_SERVICE && port == httpsport) { 514 snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT); 515 error = getaddrinfo(host, pbuf, &hints, &res0); 516 #endif /* !NOSSL */ 517 } 518 if (error) { 519 warnx("%s: %s", host, gai_strerror(error)); 520 goto cleanup_url_get; 521 } 522 523 #ifndef SMALL 524 if (srcaddr) { 525 hints.ai_flags |= AI_NUMERICHOST; 526 error = getaddrinfo(srcaddr, NULL, &hints, &ares); 527 if (error) { 528 warnx("%s: %s", srcaddr, gai_strerror(error)); 529 goto cleanup_url_get; 530 } 531 } 532 #endif /* !SMALL */ 533 534 /* ensure consistent order of the output */ 535 if (verbose) 536 setvbuf(ttyout, NULL, _IOLBF, 0); 537 538 s = -1; 539 for (res = res0; res; res = res->ai_next) { 540 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 541 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 542 strlcpy(hbuf, "(unknown)", sizeof(hbuf)); 543 if (verbose) 544 fprintf(ttyout, "Trying %s...\n", hbuf); 545 546 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 547 if (s == -1) { 548 cause = "socket"; 549 continue; 550 } 551 552 #ifndef SMALL 553 if (srcaddr) { 554 if (ares->ai_family != res->ai_family) { 555 close(s); 556 s = -1; 557 errno = EINVAL; 558 cause = "bind"; 559 continue; 560 } 561 if (bind(s, ares->ai_addr, ares->ai_addrlen) < 0) { 562 save_errno = errno; 563 close(s); 564 errno = save_errno; 565 s = -1; 566 cause = "bind"; 567 continue; 568 } 569 } 570 #endif /* !SMALL */ 571 572 if (connect_timeout) { 573 (void)signal(SIGALRM, tooslow); 574 alarmtimer(connect_timeout); 575 } 576 577 for (error = connect(s, res->ai_addr, res->ai_addrlen); 578 error != 0 && errno == EINTR; error = connect_wait(s)) 579 continue; 580 if (error != 0) { 581 save_errno = errno; 582 close(s); 583 errno = save_errno; 584 s = -1; 585 cause = "connect"; 586 continue; 587 } 588 589 /* get port in numeric */ 590 if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0, 591 pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0) 592 port = pbuf; 593 else 594 port = NULL; 595 596 #ifndef NOSSL 597 if (proxyenv && sslhost) 598 proxy_connect(s, sslhost, credentials); 599 #endif /* !NOSSL */ 600 break; 601 } 602 freeaddrinfo(res0); 603 #ifndef SMALL 604 if (srcaddr) 605 freeaddrinfo(ares); 606 #endif /* !SMALL */ 607 if (s < 0) { 608 warn("%s", cause); 609 goto cleanup_url_get; 610 } 611 612 #ifndef NOSSL 613 if (ishttpsurl) { 614 if (proxyenv && sslpath) { 615 ishttpsurl = 0; 616 proxyurl = NULL; 617 path = sslpath; 618 } 619 if (sslhost == NULL) { 620 sslhost = strdup(host); 621 if (sslhost == NULL) 622 errx(1, "Can't allocate memory for https host."); 623 } 624 if ((tls = tls_client()) == NULL) { 625 fprintf(ttyout, "failed to create SSL client\n"); 626 goto cleanup_url_get; 627 } 628 if (tls_configure(tls, tls_config) != 0) { 629 fprintf(ttyout, "SSL configuration failure: %s\n", 630 tls_error(tls)); 631 goto cleanup_url_get; 632 } 633 if (tls_connect_socket(tls, s, sslhost) != 0) { 634 fprintf(ttyout, "SSL failure: %s\n", tls_error(tls)); 635 goto cleanup_url_get; 636 } 637 } else { 638 fin = fdopen(s, "r+"); 639 } 640 #else /* !NOSSL */ 641 fin = fdopen(s, "r+"); 642 #endif /* !NOSSL */ 643 644 #ifdef SMALL 645 if (lastfile) { 646 if (pipeout) { 647 if (pledge("stdio rpath inet dns tty", NULL) == -1) 648 err(1, "pledge"); 649 } else { 650 if (pledge("stdio rpath wpath cpath inet dns tty", NULL) == -1) 651 err(1, "pledge"); 652 } 653 } 654 #endif 655 656 if (connect_timeout) { 657 signal(SIGALRM, SIG_DFL); 658 alarmtimer(0); 659 } 660 661 /* 662 * Construct and send the request. Proxy requests don't want leading /. 663 */ 664 #ifndef NOSSL 665 cookie_get(host, path, ishttpsurl, &buf); 666 #endif /* !NOSSL */ 667 668 epath = url_encode(path); 669 if (proxyurl) { 670 if (verbose) { 671 fprintf(ttyout, "Requesting %s (via %s)\n", 672 origline, proxyurl); 673 } 674 /* 675 * Host: directive must use the destination host address for 676 * the original URI (path). 677 */ 678 if (credentials) 679 ftp_printf(fin, tls, "GET %s HTTP/1.0\r\n" 680 "Proxy-Authorization: Basic %s\r\n" 681 "Host: %s\r\n%s%s\r\n\r\n", 682 epath, credentials, 683 proxyhost, buf ? buf : "", httpuseragent); 684 else 685 ftp_printf(fin, tls, "GET %s HTTP/1.0\r\n" 686 "Host: %s\r\n%s%s\r\n\r\n", 687 epath, proxyhost, buf ? buf : "", httpuseragent); 688 } else { 689 if (verbose) 690 fprintf(ttyout, "Requesting %s\n", origline); 691 #ifndef SMALL 692 if (resume) { 693 struct stat stbuf; 694 695 if (stat(savefile, &stbuf) == 0) 696 restart_point = stbuf.st_size; 697 else 698 restart_point = 0; 699 } 700 #endif /* SMALL */ 701 #ifndef NOSSL 702 if (credentials) { 703 ftp_printf(fin, tls, 704 "GET /%s %s\r\nAuthorization: Basic %s\r\nHost: ", 705 epath, restart_point ? 706 "HTTP/1.1\r\nConnection: close" : "HTTP/1.0", 707 credentials); 708 free(credentials); 709 credentials = NULL; 710 } else 711 #endif /* NOSSL */ 712 ftp_printf(fin, tls, "GET /%s %s\r\nHost: ", epath, 713 #ifndef SMALL 714 restart_point ? "HTTP/1.1\r\nConnection: close" : 715 #endif /* !SMALL */ 716 "HTTP/1.0"); 717 if (proxyhost) { 718 ftp_printf(fin, tls, "%s", proxyhost); 719 port = NULL; 720 } else if (strchr(host, ':')) { 721 /* 722 * strip off scoped address portion, since it's 723 * local to node 724 */ 725 h = strdup(host); 726 if (h == NULL) 727 errx(1, "Can't allocate memory."); 728 if ((p = strchr(h, '%')) != NULL) 729 *p = '\0'; 730 ftp_printf(fin, tls, "[%s]", h); 731 free(h); 732 } else 733 ftp_printf(fin, tls, "%s", host); 734 735 /* 736 * Send port number only if it's specified and does not equal 737 * 80. Some broken HTTP servers get confused if you explicitly 738 * send them the port number. 739 */ 740 #ifndef NOSSL 741 if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0) 742 ftp_printf(fin, tls, ":%s", port); 743 if (restart_point) 744 ftp_printf(fin, tls, "\r\nRange: bytes=%lld-", 745 (long long)restart_point); 746 #else /* !NOSSL */ 747 if (port && strcmp(port, "80") != 0) 748 ftp_printf(fin, tls, ":%s", port); 749 #endif /* !NOSSL */ 750 ftp_printf(fin, tls, "\r\n%s%s\r\n\r\n", 751 buf ? buf : "", httpuseragent); 752 } 753 free(epath); 754 755 #ifndef NOSSL 756 free(buf); 757 #endif /* !NOSSL */ 758 buf = NULL; 759 760 if (fin != NULL && fflush(fin) == EOF) { 761 warn("Writing HTTP request"); 762 goto cleanup_url_get; 763 } 764 if ((buf = ftp_readline(fin, tls, &len)) == NULL) { 765 warn("Receiving HTTP reply"); 766 goto cleanup_url_get; 767 } 768 769 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 770 buf[--len] = '\0'; 771 #ifndef SMALL 772 if (debug) 773 fprintf(ttyout, "received '%s'\n", buf); 774 #endif /* !SMALL */ 775 776 cp = strchr(buf, ' '); 777 if (cp == NULL) 778 goto improper; 779 else 780 cp++; 781 782 strlcpy(ststr, cp, sizeof(ststr)); 783 status = strtonum(ststr, 200, 416, &errstr); 784 if (errstr) { 785 warnx("Error retrieving file: %s", cp); 786 goto cleanup_url_get; 787 } 788 789 switch (status) { 790 case 200: /* OK */ 791 #ifndef SMALL 792 /* 793 * When we request a partial file, and we receive an HTTP 200 794 * it is a good indication that the server doesn't support 795 * range requests, and is about to send us the entire file. 796 * If the restart_point == 0, then we are not actually 797 * requesting a partial file, and an HTTP 200 is appropriate. 798 */ 799 if (resume && restart_point != 0) { 800 warnx("Server does not support resume."); 801 restart_point = resume = 0; 802 } 803 /* FALLTHROUGH */ 804 case 206: /* Partial Content */ 805 #endif /* !SMALL */ 806 break; 807 case 301: /* Moved Permanently */ 808 case 302: /* Found */ 809 case 303: /* See Other */ 810 case 307: /* Temporary Redirect */ 811 isredirect++; 812 if (redirect_loop++ > 10) { 813 warnx("Too many redirections requested"); 814 goto cleanup_url_get; 815 } 816 break; 817 #ifndef SMALL 818 case 416: /* Requested Range Not Satisfiable */ 819 warnx("File is already fully retrieved."); 820 goto cleanup_url_get; 821 #endif /* !SMALL */ 822 default: 823 warnx("Error retrieving file: %s", cp); 824 goto cleanup_url_get; 825 } 826 827 /* 828 * Read the rest of the header. 829 */ 830 free(buf); 831 filesize = -1; 832 833 for (;;) { 834 if ((buf = ftp_readline(fin, tls, &len)) == NULL) { 835 warn("Receiving HTTP reply"); 836 goto cleanup_url_get; 837 } 838 839 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 840 buf[--len] = '\0'; 841 if (len == 0) 842 break; 843 #ifndef SMALL 844 if (debug) 845 fprintf(ttyout, "received '%s'\n", buf); 846 #endif /* !SMALL */ 847 848 /* Look for some headers */ 849 cp = buf; 850 #define CONTENTLEN "Content-Length: " 851 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 852 size_t s; 853 cp += sizeof(CONTENTLEN) - 1; 854 if ((s = strcspn(cp, " \t"))) 855 *(cp+s) = 0; 856 filesize = strtonum(cp, 0, LLONG_MAX, &errstr); 857 if (errstr != NULL) 858 goto improper; 859 #ifndef SMALL 860 if (restart_point) 861 filesize += restart_point; 862 #endif /* !SMALL */ 863 #define LOCATION "Location: " 864 } else if (isredirect && 865 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 866 cp += sizeof(LOCATION) - 1; 867 /* 868 * If there is a colon before the first slash, this URI 869 * is not relative. RFC 3986 4.2 870 */ 871 if (cp[strcspn(cp, ":/")] != ':') { 872 #ifdef SMALL 873 errx(1, "Relative redirect not supported"); 874 #else /* SMALL */ 875 /* XXX doesn't handle protocol-relative URIs */ 876 if (*cp == '/') { 877 locbase = NULL; 878 cp++; 879 } else { 880 locbase = strdup(path); 881 if (locbase == NULL) 882 errx(1, "Can't allocate memory" 883 " for location base"); 884 loctail = strchr(locbase, '#'); 885 if (loctail != NULL) 886 *loctail = '\0'; 887 loctail = strchr(locbase, '?'); 888 if (loctail != NULL) 889 *loctail = '\0'; 890 loctail = strrchr(locbase, '/'); 891 if (loctail == NULL) { 892 free(locbase); 893 locbase = NULL; 894 } else 895 loctail[1] = '\0'; 896 } 897 /* Contruct URL from relative redirect */ 898 if (asprintf(&redirurl, "%s%s%s%s/%s%s", 899 scheme, full_host, 900 portnum ? ":" : "", 901 portnum ? portnum : "", 902 locbase ? locbase : "", 903 cp) == -1) 904 errx(1, "Cannot build " 905 "redirect URL"); 906 free(locbase); 907 #endif /* SMALL */ 908 } else if ((redirurl = strdup(cp)) == NULL) 909 errx(1, "Cannot allocate memory for URL"); 910 loctail = strchr(redirurl, '#'); 911 if (loctail != NULL) 912 *loctail = '\0'; 913 if (verbose) 914 fprintf(ttyout, "Redirected to %s\n", redirurl); 915 if (fin != NULL) 916 fclose(fin); 917 else if (s != -1) 918 close(s); 919 rval = url_get(redirurl, proxyenv, savefile, lastfile); 920 free(redirurl); 921 goto cleanup_url_get; 922 } 923 free(buf); 924 } 925 926 /* Open the output file. */ 927 if (!pipeout) { 928 #ifndef SMALL 929 if (resume) 930 out = open(savefile, O_CREAT | O_WRONLY | O_APPEND, 931 0666); 932 else 933 #endif /* !SMALL */ 934 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 935 0666); 936 if (out < 0) { 937 warn("Can't open %s", savefile); 938 goto cleanup_url_get; 939 } 940 } else { 941 out = fileno(stdout); 942 #ifdef SMALL 943 if (lastfile) { 944 if (pledge("stdio tty", NULL) == -1) 945 err(1, "pledge"); 946 } 947 #endif 948 } 949 950 /* Trap signals */ 951 oldintr = NULL; 952 oldinti = NULL; 953 if (setjmp(httpabort)) { 954 if (oldintr) 955 (void)signal(SIGINT, oldintr); 956 if (oldinti) 957 (void)signal(SIGINFO, oldinti); 958 goto cleanup_url_get; 959 } 960 oldintr = signal(SIGINT, aborthttp); 961 962 bytes = 0; 963 hashbytes = mark; 964 progressmeter(-1, path); 965 966 free(buf); 967 968 /* Finally, suck down the file. */ 969 if ((buf = malloc(buflen)) == NULL) 970 errx(1, "Can't allocate memory for transfer buffer"); 971 i = 0; 972 len = 1; 973 oldinti = signal(SIGINFO, psummary); 974 while (len > 0) { 975 len = ftp_read(fin, tls, buf, buflen); 976 bytes += len; 977 for (cp = buf, wlen = len; wlen > 0; wlen -= i, cp += i) { 978 if ((i = write(out, cp, wlen)) == -1) { 979 warn("Writing %s", savefile); 980 signal(SIGINFO, oldinti); 981 goto cleanup_url_get; 982 } 983 else if (i == 0) 984 break; 985 } 986 if (hash && !progress) { 987 while (bytes >= hashbytes) { 988 (void)putc('#', ttyout); 989 hashbytes += mark; 990 } 991 (void)fflush(ttyout); 992 } 993 } 994 signal(SIGINFO, oldinti); 995 if (hash && !progress && bytes > 0) { 996 if (bytes < mark) 997 (void)putc('#', ttyout); 998 (void)putc('\n', ttyout); 999 (void)fflush(ttyout); 1000 } 1001 if (len != 0) { 1002 warn("Reading from socket"); 1003 goto cleanup_url_get; 1004 } 1005 progressmeter(1, NULL); 1006 if ( 1007 #ifndef SMALL 1008 !resume && 1009 #endif /* !SMALL */ 1010 filesize != -1 && len == 0 && bytes != filesize) { 1011 if (verbose) 1012 fputs("Read short file.\n", ttyout); 1013 goto cleanup_url_get; 1014 } 1015 1016 if (verbose) 1017 ptransfer(0); 1018 (void)signal(SIGINT, oldintr); 1019 1020 rval = 0; 1021 goto cleanup_url_get; 1022 1023 noftpautologin: 1024 warnx( 1025 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 1026 goto cleanup_url_get; 1027 1028 improper: 1029 warnx("Improper response from %s", host); 1030 1031 cleanup_url_get: 1032 #ifndef NOSSL 1033 if (tls != NULL) { 1034 tls_close(tls); 1035 tls_free(tls); 1036 } 1037 free(full_host); 1038 free(sslhost); 1039 #endif /* !NOSSL */ 1040 if (fin != NULL) 1041 fclose(fin); 1042 else if (s != -1) 1043 close(s); 1044 if (out >= 0 && out != fileno(stdout)) 1045 close(out); 1046 free(buf); 1047 free(proxyhost); 1048 free(proxyurl); 1049 free(newline); 1050 free(credentials); 1051 return (rval); 1052 } 1053 1054 /* 1055 * Abort a http retrieval 1056 */ 1057 /* ARGSUSED */ 1058 void 1059 aborthttp(int signo) 1060 { 1061 1062 alarmtimer(0); 1063 fputs("\nhttp fetch aborted.\n", ttyout); 1064 (void)fflush(ttyout); 1065 longjmp(httpabort, 1); 1066 } 1067 1068 /* 1069 * Abort a http retrieval 1070 */ 1071 /* ARGSUSED */ 1072 void 1073 abortfile(int signo) 1074 { 1075 1076 alarmtimer(0); 1077 fputs("\nfile fetch aborted.\n", ttyout); 1078 (void)fflush(ttyout); 1079 longjmp(httpabort, 1); 1080 } 1081 1082 /* 1083 * Retrieve multiple files from the command line, transferring 1084 * files of the form "host:path", "ftp://host/path" using the 1085 * ftp protocol, and files of the form "http://host/path" using 1086 * the http protocol. 1087 * If path has a trailing "/", then return (-1); 1088 * the path will be cd-ed into and the connection remains open, 1089 * and the function will return -1 (to indicate the connection 1090 * is alive). 1091 * If an error occurs the return value will be the offset+1 in 1092 * argv[] of the file that caused a problem (i.e, argv[x] 1093 * returns x+1) 1094 * Otherwise, 0 is returned if all files retrieved successfully. 1095 */ 1096 int 1097 auto_fetch(int argc, char *argv[], char *outfile) 1098 { 1099 char *xargv[5]; 1100 char *cp, *url, *host, *dir, *file, *portnum; 1101 char *username, *pass, *pathstart; 1102 char *ftpproxy, *httpproxy; 1103 int rval, xargc, lastfile; 1104 volatile int argpos; 1105 int dirhasglob, filehasglob, oautologin; 1106 char rempath[PATH_MAX]; 1107 1108 argpos = 0; 1109 1110 if (setjmp(toplevel)) { 1111 if (connected) 1112 disconnect(0, NULL); 1113 return (argpos + 1); 1114 } 1115 (void)signal(SIGINT, (sig_t)intr); 1116 (void)signal(SIGPIPE, (sig_t)lostpeer); 1117 1118 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 1119 ftpproxy = NULL; 1120 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 1121 httpproxy = NULL; 1122 1123 /* 1124 * Loop through as long as there's files to fetch. 1125 */ 1126 username = pass = NULL; 1127 for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) { 1128 if (strchr(argv[argpos], ':') == NULL) 1129 break; 1130 1131 free(username); 1132 free(pass); 1133 host = dir = file = portnum = username = pass = NULL; 1134 1135 lastfile = (argv[argpos+1] == NULL); 1136 1137 /* 1138 * We muck with the string, so we make a copy. 1139 */ 1140 url = strdup(argv[argpos]); 1141 if (url == NULL) 1142 errx(1, "Can't allocate memory for auto-fetch."); 1143 1144 /* 1145 * Try HTTP URL-style arguments first. 1146 */ 1147 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1148 #ifndef NOSSL 1149 /* even if we compiled without SSL, url_get will check */ 1150 strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0 || 1151 #endif /* !NOSSL */ 1152 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 1153 redirect_loop = 0; 1154 if (url_get(url, httpproxy, outfile, lastfile) == -1) 1155 rval = argpos + 1; 1156 continue; 1157 } 1158 1159 /* 1160 * Try FTP URL-style arguments next. If ftpproxy is 1161 * set, use url_get() instead of standard ftp. 1162 * Finally, try host:file. 1163 */ 1164 host = url; 1165 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1166 char *passend, *passagain, *userend; 1167 1168 if (ftpproxy) { 1169 if (url_get(url, ftpproxy, outfile, lastfile) == -1) 1170 rval = argpos + 1; 1171 continue; 1172 } 1173 host += sizeof(FTP_URL) - 1; 1174 dir = strchr(host, '/'); 1175 1176 /* Look for [user:pass@]host[:port] */ 1177 1178 /* check if we have "user:pass@" */ 1179 userend = strchr(host, ':'); 1180 passend = strchr(host, '@'); 1181 if (passend && userend && userend < passend && 1182 (!dir || passend < dir)) { 1183 username = host; 1184 pass = userend + 1; 1185 host = passend + 1; 1186 *userend = *passend = '\0'; 1187 passagain = strchr(host, '@'); 1188 if (strchr(pass, '@') != NULL || 1189 (passagain != NULL && passagain < dir)) { 1190 warnx(at_encoding_warning); 1191 username = pass = NULL; 1192 goto bad_ftp_url; 1193 } 1194 1195 if (EMPTYSTRING(username)) { 1196 bad_ftp_url: 1197 warnx("Invalid URL: %s", argv[argpos]); 1198 rval = argpos + 1; 1199 username = pass = NULL; 1200 continue; 1201 } 1202 username = urldecode(username); 1203 pass = urldecode(pass); 1204 } 1205 1206 /* check [host]:port, or [host] */ 1207 if (host[0] == '[') { 1208 cp = strchr(host, ']'); 1209 if (cp && (!dir || cp < dir)) { 1210 if (cp + 1 == dir || cp[1] == ':') { 1211 host++; 1212 *cp++ = '\0'; 1213 } else 1214 cp = NULL; 1215 } else 1216 cp = host; 1217 } else 1218 cp = host; 1219 1220 /* split off host[:port] if there is */ 1221 if (cp) { 1222 portnum = strchr(cp, ':'); 1223 pathstart = strchr(cp, '/'); 1224 /* : in path is not a port # indicator */ 1225 if (portnum && pathstart && 1226 pathstart < portnum) 1227 portnum = NULL; 1228 1229 if (!portnum) 1230 ; 1231 else { 1232 if (!dir) 1233 ; 1234 else if (portnum + 1 < dir) { 1235 *portnum++ = '\0'; 1236 /* 1237 * XXX should check if portnum 1238 * is decimal number 1239 */ 1240 } else { 1241 /* empty portnum */ 1242 goto bad_ftp_url; 1243 } 1244 } 1245 } else 1246 portnum = NULL; 1247 } else { /* classic style `host:file' */ 1248 dir = strchr(host, ':'); 1249 } 1250 if (EMPTYSTRING(host)) { 1251 rval = argpos + 1; 1252 continue; 1253 } 1254 1255 /* 1256 * If dir is NULL, the file wasn't specified 1257 * (URL looked something like ftp://host) 1258 */ 1259 if (dir != NULL) 1260 *dir++ = '\0'; 1261 1262 /* 1263 * Extract the file and (if present) directory name. 1264 */ 1265 if (!EMPTYSTRING(dir)) { 1266 cp = strrchr(dir, '/'); 1267 if (cp != NULL) { 1268 *cp++ = '\0'; 1269 file = cp; 1270 } else { 1271 file = dir; 1272 dir = NULL; 1273 } 1274 } 1275 #ifndef SMALL 1276 if (debug) 1277 fprintf(ttyout, 1278 "user %s:%s host %s port %s dir %s file %s\n", 1279 username, pass ? "XXXX" : NULL, host, portnum, 1280 dir, file); 1281 #endif /* !SMALL */ 1282 1283 /* 1284 * Set up the connection. 1285 */ 1286 if (connected) 1287 disconnect(0, NULL); 1288 xargv[0] = __progname; 1289 xargv[1] = host; 1290 xargv[2] = NULL; 1291 xargc = 2; 1292 if (!EMPTYSTRING(portnum)) { 1293 xargv[2] = portnum; 1294 xargv[3] = NULL; 1295 xargc = 3; 1296 } 1297 oautologin = autologin; 1298 if (username == NULL) 1299 anonftp = 1; 1300 else { 1301 anonftp = 0; 1302 autologin = 0; 1303 } 1304 setpeer(xargc, xargv); 1305 autologin = oautologin; 1306 if (connected == 0 || 1307 (connected == 1 && autologin && (username == NULL || 1308 !ftp_login(host, username, pass)))) { 1309 warnx("Can't connect or login to host `%s'", host); 1310 rval = argpos + 1; 1311 continue; 1312 } 1313 1314 /* Always use binary transfers. */ 1315 setbinary(0, NULL); 1316 1317 dirhasglob = filehasglob = 0; 1318 if (doglob) { 1319 if (!EMPTYSTRING(dir) && 1320 strpbrk(dir, "*?[]{}") != NULL) 1321 dirhasglob = 1; 1322 if (!EMPTYSTRING(file) && 1323 strpbrk(file, "*?[]{}") != NULL) 1324 filehasglob = 1; 1325 } 1326 1327 /* Change directories, if necessary. */ 1328 if (!EMPTYSTRING(dir) && !dirhasglob) { 1329 xargv[0] = "cd"; 1330 xargv[1] = dir; 1331 xargv[2] = NULL; 1332 cd(2, xargv); 1333 if (!dirchange) { 1334 rval = argpos + 1; 1335 continue; 1336 } 1337 } 1338 1339 if (EMPTYSTRING(file)) { 1340 #ifndef SMALL 1341 rval = -1; 1342 #else /* !SMALL */ 1343 recvrequest("NLST", "-", NULL, "w", 0, 0); 1344 rval = 0; 1345 #endif /* !SMALL */ 1346 continue; 1347 } 1348 1349 if (verbose) 1350 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 1351 1352 if (dirhasglob) { 1353 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1354 file = rempath; 1355 } 1356 1357 /* Fetch the file(s). */ 1358 xargc = 2; 1359 xargv[0] = "get"; 1360 xargv[1] = file; 1361 xargv[2] = NULL; 1362 if (dirhasglob || filehasglob) { 1363 int ointeractive; 1364 1365 ointeractive = interactive; 1366 interactive = 0; 1367 xargv[0] = "mget"; 1368 #ifndef SMALL 1369 if (resume) { 1370 xargc = 3; 1371 xargv[1] = "-c"; 1372 xargv[2] = file; 1373 xargv[3] = NULL; 1374 } 1375 #endif /* !SMALL */ 1376 mget(xargc, xargv); 1377 interactive = ointeractive; 1378 } else { 1379 if (outfile != NULL) { 1380 xargv[2] = outfile; 1381 xargv[3] = NULL; 1382 xargc++; 1383 } 1384 #ifndef SMALL 1385 if (resume) 1386 reget(xargc, xargv); 1387 else 1388 #endif /* !SMALL */ 1389 get(xargc, xargv); 1390 } 1391 1392 if ((code / 100) != COMPLETE) 1393 rval = argpos + 1; 1394 } 1395 if (connected && rval != -1) 1396 disconnect(0, NULL); 1397 return (rval); 1398 } 1399 1400 char * 1401 urldecode(const char *str) 1402 { 1403 char *ret, c; 1404 int i, reallen; 1405 1406 if (str == NULL) 1407 return NULL; 1408 if ((ret = malloc(strlen(str)+1)) == NULL) 1409 err(1, "Can't allocate memory for URL decoding"); 1410 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 1411 c = str[i]; 1412 if (c == '+') { 1413 *ret = ' '; 1414 continue; 1415 } 1416 1417 /* Cannot use strtol here because next char 1418 * after %xx may be a digit. 1419 */ 1420 if (c == '%' && isxdigit((unsigned char)str[i+1]) && 1421 isxdigit((unsigned char)str[i+2])) { 1422 *ret = hextochar(&str[i+1]); 1423 i+=2; 1424 continue; 1425 } 1426 *ret = c; 1427 } 1428 *ret = '\0'; 1429 1430 return ret-reallen; 1431 } 1432 1433 char * 1434 recode_credentials(const char *userinfo) 1435 { 1436 char *ui, *creds; 1437 size_t ulen, credsize; 1438 1439 /* url-decode the user and pass */ 1440 ui = urldecode(userinfo); 1441 1442 ulen = strlen(ui); 1443 credsize = (ulen + 2) / 3 * 4 + 1; 1444 creds = malloc(credsize); 1445 if (creds == NULL) 1446 errx(1, "out of memory"); 1447 if (b64_ntop(ui, ulen, creds, credsize) == -1) 1448 errx(1, "error in base64 encoding"); 1449 free(ui); 1450 return (creds); 1451 } 1452 1453 char 1454 hextochar(const char *str) 1455 { 1456 unsigned char c, ret; 1457 1458 c = str[0]; 1459 ret = c; 1460 if (isalpha(c)) 1461 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1462 else 1463 ret -= '0'; 1464 ret *= 16; 1465 1466 c = str[1]; 1467 ret += c; 1468 if (isalpha(c)) 1469 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1470 else 1471 ret -= '0'; 1472 return ret; 1473 } 1474 1475 int 1476 isurl(const char *p) 1477 { 1478 1479 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 1480 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1481 #ifndef NOSSL 1482 strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 || 1483 #endif /* !NOSSL */ 1484 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 1485 strstr(p, ":/")) 1486 return (1); 1487 return (0); 1488 } 1489 1490 char * 1491 ftp_readline(FILE *fp, struct tls *tls, size_t *lenp) 1492 { 1493 if (fp != NULL) 1494 return fparseln(fp, lenp, NULL, "\0\0\0", 0); 1495 #ifndef NOSSL 1496 else if (tls != NULL) 1497 return SSL_readline(tls, lenp); 1498 #endif /* !NOSSL */ 1499 else 1500 return NULL; 1501 } 1502 1503 size_t 1504 ftp_read(FILE *fp, struct tls *tls, char *buf, size_t len) 1505 { 1506 #ifndef NOSSL 1507 ssize_t tret; 1508 #endif 1509 size_t ret = 0; 1510 1511 if (fp != NULL) 1512 ret = fread(buf, sizeof(char), len, fp); 1513 #ifndef NOSSL 1514 else if (tls != NULL) { 1515 do { 1516 tret = tls_read(tls, buf, len); 1517 } while (tret == TLS_WANT_POLLIN || tret == TLS_WANT_POLLOUT); 1518 if (tret < 0) 1519 errx(1, "SSL read error: %s", tls_error(tls)); 1520 ret = (size_t)tret; 1521 } 1522 #endif /* !NOSSL */ 1523 return (ret); 1524 } 1525 1526 int 1527 ftp_printf(FILE *fp, struct tls *tls, const char *fmt, ...) 1528 { 1529 int ret; 1530 va_list ap; 1531 1532 va_start(ap, fmt); 1533 1534 if (fp != NULL) 1535 ret = vfprintf(fp, fmt, ap); 1536 #ifndef NOSSL 1537 else if (tls != NULL) 1538 ret = SSL_vprintf(tls, fmt, ap); 1539 #endif /* !NOSSL */ 1540 else 1541 ret = 0; 1542 1543 va_end(ap); 1544 #ifndef SMALL 1545 if (debug) { 1546 va_start(ap, fmt); 1547 ret = vfprintf(ttyout, fmt, ap); 1548 va_end(ap); 1549 } 1550 #endif /* !SMALL */ 1551 return (ret); 1552 } 1553 1554 #ifndef NOSSL 1555 int 1556 SSL_vprintf(struct tls *tls, const char *fmt, va_list ap) 1557 { 1558 char *string, *buf; 1559 size_t len; 1560 int ret; 1561 1562 if ((ret = vasprintf(&string, fmt, ap)) == -1) 1563 return ret; 1564 buf = string; 1565 len = ret; 1566 while (len > 0) { 1567 ret = tls_write(tls, buf, len); 1568 if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) 1569 continue; 1570 if (ret < 0) 1571 errx(1, "SSL write error: %s", tls_error(tls)); 1572 buf += ret; 1573 len -= ret; 1574 } 1575 free(string); 1576 return ret; 1577 } 1578 1579 char * 1580 SSL_readline(struct tls *tls, size_t *lenp) 1581 { 1582 size_t i, len; 1583 char *buf, *q, c; 1584 int ret; 1585 1586 len = 128; 1587 if ((buf = malloc(len)) == NULL) 1588 errx(1, "Can't allocate memory for transfer buffer"); 1589 for (i = 0; ; i++) { 1590 if (i >= len - 1) { 1591 if ((q = reallocarray(buf, len, 2)) == NULL) 1592 errx(1, "Can't expand transfer buffer"); 1593 buf = q; 1594 len *= 2; 1595 } 1596 do { 1597 ret = tls_read(tls, &c, 1); 1598 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1599 if (ret < 0) 1600 errx(1, "SSL read error: %s", tls_error(tls)); 1601 1602 buf[i] = c; 1603 if (c == '\n') { 1604 buf[i] = '\0'; 1605 break; 1606 } 1607 } 1608 *lenp = i; 1609 return (buf); 1610 } 1611 1612 int 1613 proxy_connect(int socket, char *host, char *cookie) 1614 { 1615 int l; 1616 char buf[1024]; 1617 char *connstr, *hosttail, *port; 1618 1619 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 1620 (hosttail[1] == '\0' || hosttail[1] == ':')) { 1621 host++; 1622 *hosttail++ = '\0'; 1623 } else 1624 hosttail = host; 1625 1626 port = strrchr(hosttail, ':'); /* find portnum */ 1627 if (port != NULL) 1628 *port++ = '\0'; 1629 if (!port) 1630 port = "443"; 1631 1632 if (cookie) { 1633 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1634 "Proxy-Authorization: Basic %s\r\n%s\r\n\r\n", 1635 host, port, cookie, HTTP_USER_AGENT); 1636 } else { 1637 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n%s\r\n\r\n", 1638 host, port, HTTP_USER_AGENT); 1639 } 1640 1641 if (l == -1) 1642 errx(1, "Could not allocate memory to assemble connect string!"); 1643 #ifndef SMALL 1644 if (debug) 1645 printf("%s", connstr); 1646 #endif /* !SMALL */ 1647 if (write(socket, connstr, l) != l) 1648 err(1, "Could not send connect string"); 1649 read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */ 1650 free(connstr); 1651 return(200); 1652 } 1653 #endif /* !NOSSL */ 1654