1 /* $OpenBSD: fetch.c,v 1.200 2021/02/02 12:58:42 robert 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 <vis.h> 53 #include <stdio.h> 54 #include <stdarg.h> 55 #include <errno.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 #include <util.h> 60 #include <resolv.h> 61 #include <utime.h> 62 63 #ifndef NOSSL 64 #include <tls.h> 65 #else /* !NOSSL */ 66 struct tls; 67 #endif /* !NOSSL */ 68 69 #include "ftp_var.h" 70 #include "cmds.h" 71 72 static int file_get(const char *, const char *); 73 static int url_get(const char *, const char *, const char *, int); 74 static int save_chunked(FILE *, struct tls *, int , char *, size_t); 75 static void aborthttp(int); 76 static char hextochar(const char *); 77 static char *urldecode(const char *); 78 static char *recode_credentials(const char *_userinfo); 79 static char *ftp_readline(FILE *, size_t *); 80 static void ftp_close(FILE **, struct tls **, int *); 81 static const char *sockerror(struct tls *); 82 #ifdef SMALL 83 #define ftp_printf(fp, ...) fprintf(fp, __VA_ARGS__) 84 #else 85 static int ftp_printf(FILE *, const char *, ...); 86 #endif /* SMALL */ 87 #ifndef NOSSL 88 static int proxy_connect(int, char *, char *); 89 static int stdio_tls_write_wrapper(void *, const char *, int); 90 static int stdio_tls_read_wrapper(void *, char *, int); 91 #endif /* !NOSSL */ 92 93 #define FTP_URL "ftp://" /* ftp URL prefix */ 94 #define HTTP_URL "http://" /* http URL prefix */ 95 #define HTTPS_URL "https://" /* https URL prefix */ 96 #define FILE_URL "file:" /* file URL prefix */ 97 #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */ 98 #define HTTP_PROXY "http_proxy" /* env var with http proxy location */ 99 100 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 101 102 static const char at_encoding_warning[] = 103 "Extra `@' characters in usernames and passwords should be encoded as %%40"; 104 105 static jmp_buf httpabort; 106 107 static int redirect_loop; 108 static int retried; 109 110 /* 111 * Determine whether the character needs encoding, per RFC1738: 112 * - No corresponding graphic US-ASCII. 113 * - Unsafe characters. 114 */ 115 static int 116 unsafe_char(const char *c0) 117 { 118 const char *unsafe_chars = " <>\"#{}|\\^~[]`"; 119 const unsigned char *c = (const unsigned char *)c0; 120 121 /* 122 * No corresponding graphic US-ASCII. 123 * Control characters and octets not used in US-ASCII. 124 */ 125 return (iscntrl(*c) || !isascii(*c) || 126 127 /* 128 * Unsafe characters. 129 * '%' is also unsafe, if is not followed by two 130 * hexadecimal digits. 131 */ 132 strchr(unsafe_chars, *c) != NULL || 133 (*c == '%' && (!isxdigit(*++c) || !isxdigit(*++c)))); 134 } 135 136 /* 137 * Encode given URL, per RFC1738. 138 * Allocate and return string to the caller. 139 */ 140 static char * 141 url_encode(const char *path) 142 { 143 size_t i, length, new_length; 144 char *epath, *epathp; 145 146 length = new_length = strlen(path); 147 148 /* 149 * First pass: 150 * Count unsafe characters, and determine length of the 151 * final URL. 152 */ 153 for (i = 0; i < length; i++) 154 if (unsafe_char(path + i)) 155 new_length += 2; 156 157 epath = epathp = malloc(new_length + 1); /* One more for '\0'. */ 158 if (epath == NULL) 159 err(1, "Can't allocate memory for URL encoding"); 160 161 /* 162 * Second pass: 163 * Encode, and copy final URL. 164 */ 165 for (i = 0; i < length; i++) 166 if (unsafe_char(path + i)) { 167 snprintf(epathp, 4, "%%" "%02x", 168 (unsigned char)path[i]); 169 epathp += 3; 170 } else 171 *(epathp++) = path[i]; 172 173 *epathp = '\0'; 174 return (epath); 175 } 176 177 /* ARGSUSED */ 178 static void 179 tooslow(int signo) 180 { 181 dprintf(STDERR_FILENO, "%s: connect taking too long\n", __progname); 182 _exit(2); 183 } 184 185 /* 186 * Copy a local file (used by the OpenBSD installer). 187 * Returns -1 on failure, 0 on success 188 */ 189 static int 190 file_get(const char *path, const char *outfile) 191 { 192 struct stat st; 193 int fd, out = -1, rval = -1, save_errno; 194 volatile sig_t oldintr, oldinti; 195 const char *savefile; 196 char *buf = NULL, *cp, *pathbuf = NULL; 197 const size_t buflen = 128 * 1024; 198 off_t hashbytes; 199 ssize_t len, wlen; 200 201 direction = "received"; 202 203 fd = open(path, O_RDONLY); 204 if (fd == -1) { 205 warn("Can't open file %s", path); 206 return -1; 207 } 208 209 if (fstat(fd, &st) == -1) 210 filesize = -1; 211 else 212 filesize = st.st_size; 213 214 if (outfile != NULL) 215 savefile = outfile; 216 else { 217 if (path[strlen(path) - 1] == '/') /* Consider no file */ 218 savefile = NULL; /* after dir invalid. */ 219 else { 220 pathbuf = strdup(path); 221 if (pathbuf == NULL) 222 errx(1, "Can't allocate memory for filename"); 223 savefile = basename(pathbuf); 224 } 225 } 226 227 if (EMPTYSTRING(savefile)) { 228 warnx("No filename after directory (use -o): %s", path); 229 goto cleanup_copy; 230 } 231 232 /* Open the output file. */ 233 if (!pipeout) { 234 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666); 235 if (out == -1) { 236 warn("Can't open %s", savefile); 237 goto cleanup_copy; 238 } 239 } else 240 out = fileno(stdout); 241 242 if ((buf = malloc(buflen)) == NULL) 243 errx(1, "Can't allocate memory for transfer buffer"); 244 245 /* Trap signals */ 246 oldintr = NULL; 247 oldinti = NULL; 248 if (setjmp(httpabort)) { 249 if (oldintr) 250 (void)signal(SIGINT, oldintr); 251 if (oldinti) 252 (void)signal(SIGINFO, oldinti); 253 goto cleanup_copy; 254 } 255 oldintr = signal(SIGINT, aborthttp); 256 257 bytes = 0; 258 hashbytes = mark; 259 progressmeter(-1, path); 260 261 /* Finally, suck down the file. */ 262 oldinti = signal(SIGINFO, psummary); 263 while ((len = read(fd, buf, buflen)) > 0) { 264 bytes += len; 265 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 266 if ((wlen = write(out, cp, len)) == -1) { 267 warn("Writing %s", savefile); 268 signal(SIGINT, oldintr); 269 signal(SIGINFO, oldinti); 270 goto cleanup_copy; 271 } 272 } 273 if (hash && !progress) { 274 while (bytes >= hashbytes) { 275 (void)putc('#', ttyout); 276 hashbytes += mark; 277 } 278 (void)fflush(ttyout); 279 } 280 } 281 save_errno = errno; 282 signal(SIGINT, oldintr); 283 signal(SIGINFO, oldinti); 284 if (hash && !progress && bytes > 0) { 285 if (bytes < mark) 286 (void)putc('#', ttyout); 287 (void)putc('\n', ttyout); 288 (void)fflush(ttyout); 289 } 290 if (len == -1) { 291 warnc(save_errno, "Reading from file"); 292 goto cleanup_copy; 293 } 294 progressmeter(1, NULL); 295 if (verbose) 296 ptransfer(0); 297 298 rval = 0; 299 300 cleanup_copy: 301 free(buf); 302 free(pathbuf); 303 if (out >= 0 && out != fileno(stdout)) 304 close(out); 305 close(fd); 306 307 return rval; 308 } 309 310 /* 311 * Retrieve URL, via the proxy in $proxyvar if necessary. 312 * Returns -1 on failure, 0 on success 313 */ 314 static int 315 url_get(const char *origline, const char *proxyenv, const char *outfile, int lastfile) 316 { 317 char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST], *cp, *portnum, *path, ststr[4]; 318 char *hosttail, *cause = "unknown", *newline, *host, *port, *buf = NULL; 319 char *epath, *redirurl, *loctail, *h, *p, gerror[200]; 320 int error, isftpurl = 0, isredirect = 0, rval = -1; 321 int isunavail = 0, retryafter = -1; 322 struct addrinfo hints, *res0, *res; 323 const char *savefile; 324 char *pathbuf = NULL; 325 char *proxyurl = NULL; 326 char *credentials = NULL, *proxy_credentials = NULL; 327 int fd = -1, out = -1; 328 volatile sig_t oldintr, oldinti; 329 FILE *fin = NULL; 330 off_t hashbytes; 331 const char *errstr; 332 ssize_t len, wlen; 333 char *proxyhost = NULL; 334 #ifndef NOSSL 335 char *sslpath = NULL, *sslhost = NULL; 336 int ishttpsurl = 0; 337 #endif /* !NOSSL */ 338 #ifndef SMALL 339 char *full_host = NULL; 340 const char *scheme; 341 char *locbase; 342 struct addrinfo *ares = NULL; 343 char tmbuf[32]; 344 time_t mtime = 0; 345 struct stat stbuf; 346 struct tm lmt = { 0 }; 347 struct timespec ts[2]; 348 #endif /* !SMALL */ 349 struct tls *tls = NULL; 350 int status; 351 int save_errno; 352 const size_t buflen = 128 * 1024; 353 int chunked = 0; 354 355 direction = "received"; 356 357 newline = strdup(origline); 358 if (newline == NULL) 359 errx(1, "Can't allocate memory to parse URL"); 360 if (strncasecmp(newline, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 361 host = newline + sizeof(HTTP_URL) - 1; 362 #ifndef SMALL 363 scheme = HTTP_URL; 364 #endif /* !SMALL */ 365 } else if (strncasecmp(newline, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 366 host = newline + sizeof(FTP_URL) - 1; 367 isftpurl = 1; 368 #ifndef SMALL 369 scheme = FTP_URL; 370 #endif /* !SMALL */ 371 } else if (strncasecmp(newline, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0) { 372 #ifndef NOSSL 373 host = newline + sizeof(HTTPS_URL) - 1; 374 ishttpsurl = 1; 375 #else 376 errx(1, "%s: No HTTPS support", newline); 377 #endif /* !NOSSL */ 378 #ifndef SMALL 379 scheme = HTTPS_URL; 380 #endif /* !SMALL */ 381 } else 382 errx(1, "%s: URL not permitted", newline); 383 384 path = strchr(host, '/'); /* Find path */ 385 386 /* 387 * Look for auth header in host. 388 * Basic auth from RFC 2617, valid characters for path are in 389 * RFC 3986 section 3.3. 390 */ 391 if (!isftpurl) { 392 p = strchr(host, '@'); 393 if (p != NULL && (path == NULL || p < path)) { 394 *p++ = '\0'; 395 credentials = recode_credentials(host); 396 397 /* Overwrite userinfo */ 398 memmove(host, p, strlen(p) + 1); 399 path = strchr(host, '/'); 400 } 401 } 402 403 if (EMPTYSTRING(path)) { 404 if (outfile) { /* No slash, but */ 405 path = strchr(host,'\0'); /* we have outfile. */ 406 goto noslash; 407 } 408 if (isftpurl) 409 goto noftpautologin; 410 warnx("No `/' after host (use -o): %s", origline); 411 goto cleanup_url_get; 412 } 413 *path++ = '\0'; 414 if (EMPTYSTRING(path) && !outfile) { 415 if (isftpurl) 416 goto noftpautologin; 417 warnx("No filename after host (use -o): %s", origline); 418 goto cleanup_url_get; 419 } 420 421 noslash: 422 if (outfile) 423 savefile = outfile; 424 else { 425 if (path[strlen(path) - 1] == '/') /* Consider no file */ 426 savefile = NULL; /* after dir invalid. */ 427 else { 428 pathbuf = strdup(path); 429 if (pathbuf == NULL) 430 errx(1, "Can't allocate memory for filename"); 431 savefile = basename(pathbuf); 432 } 433 } 434 435 if (EMPTYSTRING(savefile)) { 436 if (isftpurl) 437 goto noftpautologin; 438 warnx("No filename after directory (use -o): %s", origline); 439 goto cleanup_url_get; 440 } 441 442 #ifndef SMALL 443 if (resume && pipeout) { 444 warnx("can't append to stdout"); 445 goto cleanup_url_get; 446 } 447 #endif /* !SMALL */ 448 449 if (proxyenv != NULL) { /* use proxy */ 450 #ifndef NOSSL 451 if (ishttpsurl) { 452 sslpath = strdup(path); 453 sslhost = strdup(host); 454 if (! sslpath || ! sslhost) 455 errx(1, "Can't allocate memory for https path/host."); 456 } 457 #endif /* !NOSSL */ 458 proxyhost = strdup(host); 459 if (proxyhost == NULL) 460 errx(1, "Can't allocate memory for proxy host."); 461 proxyurl = strdup(proxyenv); 462 if (proxyurl == NULL) 463 errx(1, "Can't allocate memory for proxy URL."); 464 if (strncasecmp(proxyurl, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 465 host = proxyurl + sizeof(HTTP_URL) - 1; 466 else if (strncasecmp(proxyurl, FTP_URL, sizeof(FTP_URL) - 1) == 0) 467 host = proxyurl + sizeof(FTP_URL) - 1; 468 else { 469 warnx("Malformed proxy URL: %s", proxyenv); 470 goto cleanup_url_get; 471 } 472 if (EMPTYSTRING(host)) { 473 warnx("Malformed proxy URL: %s", proxyenv); 474 goto cleanup_url_get; 475 } 476 if (*--path == '\0') 477 *path = '/'; /* add / back to real path */ 478 path = strchr(host, '/'); /* remove trailing / on host */ 479 if (!EMPTYSTRING(path)) 480 *path++ = '\0'; /* i guess this ++ is useless */ 481 482 path = strchr(host, '@'); /* look for credentials in proxy */ 483 if (!EMPTYSTRING(path)) { 484 *path = '\0'; 485 if (strchr(host, ':') == NULL) { 486 warnx("Malformed proxy URL: %s", proxyenv); 487 goto cleanup_url_get; 488 } 489 proxy_credentials = recode_credentials(host); 490 *path = '@'; /* restore @ in proxyurl */ 491 492 /* 493 * This removes the password from proxyurl, 494 * filling with stars 495 */ 496 for (host = 1 + strchr(proxyurl + 5, ':'); *host != '@'; 497 host++) 498 *host = '*'; 499 500 host = path + 1; 501 } 502 503 path = newline; 504 } 505 506 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 507 (hosttail[1] == '\0' || hosttail[1] == ':')) { 508 host++; 509 *hosttail++ = '\0'; 510 #ifndef SMALL 511 if (asprintf(&full_host, "[%s]", host) == -1) 512 errx(1, "Cannot allocate memory for hostname"); 513 #endif /* !SMALL */ 514 } else 515 hosttail = host; 516 517 portnum = strrchr(hosttail, ':'); /* find portnum */ 518 if (portnum != NULL) 519 *portnum++ = '\0'; 520 #ifndef NOSSL 521 port = portnum ? portnum : (ishttpsurl ? httpsport : httpport); 522 #else /* !NOSSL */ 523 port = portnum ? portnum : httpport; 524 #endif /* !NOSSL */ 525 526 #ifndef SMALL 527 if (full_host == NULL) 528 if ((full_host = strdup(host)) == NULL) 529 errx(1, "Cannot allocate memory for hostname"); 530 if (debug) 531 fprintf(ttyout, "host %s, port %s, path %s, " 532 "save as %s, auth %s.\n", host, port, path, 533 savefile, credentials ? credentials : "none"); 534 #endif /* !SMALL */ 535 536 memset(&hints, 0, sizeof(hints)); 537 hints.ai_family = family; 538 hints.ai_socktype = SOCK_STREAM; 539 error = getaddrinfo(host, port, &hints, &res0); 540 /* 541 * If the services file is corrupt/missing, fall back 542 * on our hard-coded defines. 543 */ 544 if (error == EAI_SERVICE && port == httpport) { 545 snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT); 546 error = getaddrinfo(host, pbuf, &hints, &res0); 547 #ifndef NOSSL 548 } else if (error == EAI_SERVICE && port == httpsport) { 549 snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT); 550 error = getaddrinfo(host, pbuf, &hints, &res0); 551 #endif /* !NOSSL */ 552 } 553 if (error) { 554 warnx("%s: %s", host, gai_strerror(error)); 555 goto cleanup_url_get; 556 } 557 558 #ifndef SMALL 559 if (srcaddr) { 560 hints.ai_flags |= AI_NUMERICHOST; 561 error = getaddrinfo(srcaddr, NULL, &hints, &ares); 562 if (error) { 563 warnx("%s: %s", srcaddr, gai_strerror(error)); 564 goto cleanup_url_get; 565 } 566 } 567 #endif /* !SMALL */ 568 569 /* ensure consistent order of the output */ 570 if (verbose) 571 setvbuf(ttyout, NULL, _IOLBF, 0); 572 573 fd = -1; 574 for (res = res0; res; res = res->ai_next) { 575 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 576 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 577 strlcpy(hbuf, "(unknown)", sizeof(hbuf)); 578 if (verbose) 579 fprintf(ttyout, "Trying %s...\n", hbuf); 580 581 fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 582 if (fd == -1) { 583 cause = "socket"; 584 continue; 585 } 586 587 #ifndef SMALL 588 if (srcaddr) { 589 if (ares->ai_family != res->ai_family) { 590 close(fd); 591 fd = -1; 592 errno = EINVAL; 593 cause = "bind"; 594 continue; 595 } 596 if (bind(fd, ares->ai_addr, ares->ai_addrlen) == -1) { 597 save_errno = errno; 598 close(fd); 599 errno = save_errno; 600 fd = -1; 601 cause = "bind"; 602 continue; 603 } 604 } 605 #endif /* !SMALL */ 606 607 if (connect_timeout) { 608 (void)signal(SIGALRM, tooslow); 609 alarmtimer(connect_timeout); 610 } 611 612 for (error = connect(fd, res->ai_addr, res->ai_addrlen); 613 error != 0 && errno == EINTR; error = connect_wait(fd)) 614 continue; 615 if (error != 0) { 616 save_errno = errno; 617 close(fd); 618 errno = save_errno; 619 fd = -1; 620 cause = "connect"; 621 continue; 622 } 623 624 /* get port in numeric */ 625 if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0, 626 pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0) 627 port = pbuf; 628 else 629 port = NULL; 630 631 #ifndef NOSSL 632 if (proxyenv && sslhost) 633 proxy_connect(fd, sslhost, proxy_credentials); 634 #endif /* !NOSSL */ 635 break; 636 } 637 freeaddrinfo(res0); 638 #ifndef SMALL 639 if (srcaddr) 640 freeaddrinfo(ares); 641 #endif /* !SMALL */ 642 if (fd < 0) { 643 warn("%s", cause); 644 goto cleanup_url_get; 645 } 646 647 #ifndef NOSSL 648 if (ishttpsurl) { 649 ssize_t ret; 650 if (proxyenv && sslpath) { 651 ishttpsurl = 0; 652 proxyurl = NULL; 653 path = sslpath; 654 } 655 if (sslhost == NULL) { 656 sslhost = strdup(host); 657 if (sslhost == NULL) 658 errx(1, "Can't allocate memory for https host."); 659 } 660 if ((tls = tls_client()) == NULL) { 661 fprintf(ttyout, "failed to create SSL client\n"); 662 goto cleanup_url_get; 663 } 664 if (tls_configure(tls, tls_config) != 0) { 665 fprintf(ttyout, "TLS configuration failure: %s\n", 666 tls_error(tls)); 667 goto cleanup_url_get; 668 } 669 if (tls_connect_socket(tls, fd, sslhost) != 0) { 670 fprintf(ttyout, "TLS connect failure: %s\n", tls_error(tls)); 671 goto cleanup_url_get; 672 } 673 do { 674 ret = tls_handshake(tls); 675 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 676 if (ret != 0) { 677 fprintf(ttyout, "TLS handshake failure: %s\n", tls_error(tls)); 678 goto cleanup_url_get; 679 } 680 fin = funopen(tls, stdio_tls_read_wrapper, 681 stdio_tls_write_wrapper, NULL, NULL); 682 } else { 683 fin = fdopen(fd, "r+"); 684 fd = -1; 685 } 686 #else /* !NOSSL */ 687 fin = fdopen(fd, "r+"); 688 fd = -1; 689 #endif /* !NOSSL */ 690 691 #ifdef SMALL 692 if (lastfile) { 693 if (pipeout) { 694 if (pledge("stdio rpath inet dns tty", NULL) == -1) 695 err(1, "pledge"); 696 } else { 697 if (pledge("stdio rpath wpath cpath inet dns tty", NULL) == -1) 698 err(1, "pledge"); 699 } 700 } 701 #endif 702 703 if (connect_timeout) { 704 signal(SIGALRM, SIG_DFL); 705 alarmtimer(0); 706 } 707 708 /* 709 * Construct and send the request. Proxy requests don't want leading /. 710 */ 711 #ifndef NOSSL 712 cookie_get(host, path, ishttpsurl, &buf); 713 #endif /* !NOSSL */ 714 715 epath = url_encode(path); 716 if (proxyurl) { 717 if (verbose) { 718 fprintf(ttyout, "Requesting %s (via %s)\n", 719 origline, proxyurl); 720 } 721 /* 722 * Host: directive must use the destination host address for 723 * the original URI (path). 724 */ 725 ftp_printf(fin, "GET %s HTTP/1.1\r\n" 726 "Connection: close\r\n" 727 "Host: %s\r\n%s%s\r\n", 728 epath, proxyhost, buf ? buf : "", httpuseragent); 729 if (credentials) 730 ftp_printf(fin, "Authorization: Basic %s\r\n", 731 credentials); 732 if (proxy_credentials) 733 ftp_printf(fin, "Proxy-Authorization: Basic %s\r\n", 734 proxy_credentials); 735 ftp_printf(fin, "\r\n"); 736 } else { 737 if (verbose) 738 fprintf(ttyout, "Requesting %s\n", origline); 739 #ifndef SMALL 740 if (resume || timestamp) { 741 if (stat(savefile, &stbuf) == 0) { 742 if (resume) 743 restart_point = stbuf.st_size; 744 if (timestamp) 745 mtime = stbuf.st_mtime; 746 } else { 747 restart_point = 0; 748 mtime = 0; 749 } 750 } 751 #endif /* SMALL */ 752 ftp_printf(fin, 753 "GET /%s HTTP/1.1\r\n" 754 "Connection: close\r\n" 755 "Host: ", epath); 756 if (proxyhost) { 757 ftp_printf(fin, "%s", proxyhost); 758 port = NULL; 759 } else if (strchr(host, ':')) { 760 /* 761 * strip off scoped address portion, since it's 762 * local to node 763 */ 764 h = strdup(host); 765 if (h == NULL) 766 errx(1, "Can't allocate memory."); 767 if ((p = strchr(h, '%')) != NULL) 768 *p = '\0'; 769 ftp_printf(fin, "[%s]", h); 770 free(h); 771 } else 772 ftp_printf(fin, "%s", host); 773 774 /* 775 * Send port number only if it's specified and does not equal 776 * 80. Some broken HTTP servers get confused if you explicitly 777 * send them the port number. 778 */ 779 #ifndef NOSSL 780 if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0) 781 ftp_printf(fin, ":%s", port); 782 if (restart_point) 783 ftp_printf(fin, "\r\nRange: bytes=%lld-", 784 (long long)restart_point); 785 #else /* !NOSSL */ 786 if (port && strcmp(port, "80") != 0) 787 ftp_printf(fin, ":%s", port); 788 #endif /* !NOSSL */ 789 790 #ifndef SMALL 791 if (mtime && (http_time(mtime, tmbuf, sizeof(tmbuf)) != 0)) 792 ftp_printf(fin, "\r\nIf-Modified-Since: %s", tmbuf); 793 #endif /* SMALL */ 794 795 ftp_printf(fin, "\r\n%s%s\r\n", 796 buf ? buf : "", httpuseragent); 797 if (credentials) 798 ftp_printf(fin, "Authorization: Basic %s\r\n", 799 credentials); 800 ftp_printf(fin, "\r\n"); 801 } 802 free(epath); 803 804 #ifndef NOSSL 805 free(buf); 806 #endif /* !NOSSL */ 807 buf = NULL; 808 809 if (fflush(fin) == EOF) { 810 warnx("Writing HTTP request: %s", sockerror(tls)); 811 goto cleanup_url_get; 812 } 813 if ((buf = ftp_readline(fin, &len)) == NULL) { 814 warnx("Receiving HTTP reply: %s", sockerror(tls)); 815 goto cleanup_url_get; 816 } 817 818 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 819 buf[--len] = '\0'; 820 #ifndef SMALL 821 if (debug) 822 fprintf(ttyout, "received '%s'\n", buf); 823 #endif /* !SMALL */ 824 825 cp = strchr(buf, ' '); 826 if (cp == NULL) 827 goto improper; 828 else 829 cp++; 830 831 strlcpy(ststr, cp, sizeof(ststr)); 832 status = strtonum(ststr, 200, 503, &errstr); 833 if (errstr) { 834 strnvis(gerror, cp, sizeof gerror, VIS_SAFE); 835 warnx("Error retrieving %s: %s", origline, gerror); 836 goto cleanup_url_get; 837 } 838 839 switch (status) { 840 case 200: /* OK */ 841 #ifndef SMALL 842 /* 843 * When we request a partial file, and we receive an HTTP 200 844 * it is a good indication that the server doesn't support 845 * range requests, and is about to send us the entire file. 846 * If the restart_point == 0, then we are not actually 847 * requesting a partial file, and an HTTP 200 is appropriate. 848 */ 849 if (resume && restart_point != 0) { 850 warnx("Server does not support resume."); 851 restart_point = resume = 0; 852 } 853 /* FALLTHROUGH */ 854 case 206: /* Partial Content */ 855 #endif /* !SMALL */ 856 break; 857 case 301: /* Moved Permanently */ 858 case 302: /* Found */ 859 case 303: /* See Other */ 860 case 307: /* Temporary Redirect */ 861 case 308: /* Permanent Redirect (RFC 7538) */ 862 isredirect++; 863 if (redirect_loop++ > 10) { 864 warnx("Too many redirections requested"); 865 goto cleanup_url_get; 866 } 867 break; 868 #ifndef SMALL 869 case 304: /* Not Modified */ 870 warnx("File is not modified on the server"); 871 goto cleanup_url_get; 872 case 416: /* Requested Range Not Satisfiable */ 873 warnx("File is already fully retrieved."); 874 goto cleanup_url_get; 875 #endif /* !SMALL */ 876 case 503: 877 isunavail = 1; 878 break; 879 default: 880 strnvis(gerror, cp, sizeof gerror, VIS_SAFE); 881 warnx("Error retrieving %s: %s", origline, gerror); 882 goto cleanup_url_get; 883 } 884 885 /* 886 * Read the rest of the header. 887 */ 888 free(buf); 889 filesize = -1; 890 891 for (;;) { 892 if ((buf = ftp_readline(fin, &len)) == NULL) { 893 warnx("Receiving HTTP reply: %s", sockerror(tls)); 894 goto cleanup_url_get; 895 } 896 897 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 898 buf[--len] = '\0'; 899 if (len == 0) 900 break; 901 #ifndef SMALL 902 if (debug) 903 fprintf(ttyout, "received '%s'\n", buf); 904 #endif /* !SMALL */ 905 906 /* Look for some headers */ 907 cp = buf; 908 #define CONTENTLEN "Content-Length: " 909 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 910 size_t s; 911 cp += sizeof(CONTENTLEN) - 1; 912 if ((s = strcspn(cp, " \t"))) 913 *(cp+s) = 0; 914 filesize = strtonum(cp, 0, LLONG_MAX, &errstr); 915 if (errstr != NULL) 916 goto improper; 917 #ifndef SMALL 918 if (restart_point) 919 filesize += restart_point; 920 #endif /* !SMALL */ 921 #define LOCATION "Location: " 922 } else if (isredirect && 923 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 924 cp += sizeof(LOCATION) - 1; 925 /* 926 * If there is a colon before the first slash, this URI 927 * is not relative. RFC 3986 4.2 928 */ 929 if (cp[strcspn(cp, ":/")] != ':') { 930 #ifdef SMALL 931 errx(1, "Relative redirect not supported"); 932 #else /* SMALL */ 933 /* XXX doesn't handle protocol-relative URIs */ 934 if (*cp == '/') { 935 locbase = NULL; 936 cp++; 937 } else { 938 locbase = strdup(path); 939 if (locbase == NULL) 940 errx(1, "Can't allocate memory" 941 " for location base"); 942 loctail = strchr(locbase, '#'); 943 if (loctail != NULL) 944 *loctail = '\0'; 945 loctail = strchr(locbase, '?'); 946 if (loctail != NULL) 947 *loctail = '\0'; 948 loctail = strrchr(locbase, '/'); 949 if (loctail == NULL) { 950 free(locbase); 951 locbase = NULL; 952 } else 953 loctail[1] = '\0'; 954 } 955 /* Contruct URL from relative redirect */ 956 if (asprintf(&redirurl, "%s%s%s%s/%s%s", 957 scheme, full_host, 958 portnum ? ":" : "", 959 portnum ? portnum : "", 960 locbase ? locbase : "", 961 cp) == -1) 962 errx(1, "Cannot build " 963 "redirect URL"); 964 free(locbase); 965 #endif /* SMALL */ 966 } else if ((redirurl = strdup(cp)) == NULL) 967 errx(1, "Cannot allocate memory for URL"); 968 loctail = strchr(redirurl, '#'); 969 if (loctail != NULL) 970 *loctail = '\0'; 971 if (verbose) 972 fprintf(ttyout, "Redirected to %s\n", redirurl); 973 ftp_close(&fin, &tls, &fd); 974 rval = url_get(redirurl, proxyenv, savefile, lastfile); 975 free(redirurl); 976 goto cleanup_url_get; 977 #define RETRYAFTER "Retry-After: " 978 } else if (isunavail && 979 strncasecmp(cp, RETRYAFTER, sizeof(RETRYAFTER) - 1) == 0) { 980 size_t s; 981 cp += sizeof(RETRYAFTER) - 1; 982 if ((s = strcspn(cp, " \t"))) 983 cp[s] = '\0'; 984 retryafter = strtonum(cp, 0, 0, &errstr); 985 if (errstr != NULL) 986 retryafter = -1; 987 #define TRANSFER_ENCODING "Transfer-Encoding: " 988 } else if (strncasecmp(cp, TRANSFER_ENCODING, 989 sizeof(TRANSFER_ENCODING) - 1) == 0) { 990 cp += sizeof(TRANSFER_ENCODING) - 1; 991 cp[strcspn(cp, " \t")] = '\0'; 992 if (strcasecmp(cp, "chunked") == 0) 993 chunked = 1; 994 #ifndef SMALL 995 #define LAST_MODIFIED "Last-Modified: " 996 } else if (strncasecmp(cp, LAST_MODIFIED, 997 sizeof(LAST_MODIFIED) - 1) == 0) { 998 cp += sizeof(LAST_MODIFIED) - 1; 999 cp[strcspn(cp, "\t")] = '\0'; 1000 if (strptime(cp, "%a, %d %h %Y %T %Z", &lmt) == NULL) 1001 server_timestamps = 0; 1002 #endif /* !SMALL */ 1003 } 1004 free(buf); 1005 } 1006 1007 /* Content-Length should be ignored for Transfer-Encoding: chunked */ 1008 if (chunked) 1009 filesize = -1; 1010 1011 if (isunavail) { 1012 if (retried || retryafter != 0) 1013 warnx("Error retrieving %s: 503 Service Unavailable", 1014 origline); 1015 else { 1016 if (verbose) 1017 fprintf(ttyout, "Retrying %s\n", origline); 1018 retried = 1; 1019 ftp_close(&fin, &tls, &fd); 1020 rval = url_get(origline, proxyenv, savefile, lastfile); 1021 } 1022 goto cleanup_url_get; 1023 } 1024 1025 /* Open the output file. */ 1026 if (!pipeout) { 1027 #ifndef SMALL 1028 if (resume) 1029 out = open(savefile, O_CREAT | O_WRONLY | O_APPEND, 1030 0666); 1031 else 1032 #endif /* !SMALL */ 1033 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 1034 0666); 1035 if (out == -1) { 1036 warn("Can't open %s", savefile); 1037 goto cleanup_url_get; 1038 } 1039 } else { 1040 out = fileno(stdout); 1041 #ifdef SMALL 1042 if (lastfile) { 1043 if (pledge("stdio tty", NULL) == -1) 1044 err(1, "pledge"); 1045 } 1046 #endif 1047 } 1048 1049 free(buf); 1050 if ((buf = malloc(buflen)) == NULL) 1051 errx(1, "Can't allocate memory for transfer buffer"); 1052 1053 /* Trap signals */ 1054 oldintr = NULL; 1055 oldinti = NULL; 1056 if (setjmp(httpabort)) { 1057 if (oldintr) 1058 (void)signal(SIGINT, oldintr); 1059 if (oldinti) 1060 (void)signal(SIGINFO, oldinti); 1061 goto cleanup_url_get; 1062 } 1063 oldintr = signal(SIGINT, aborthttp); 1064 1065 bytes = 0; 1066 hashbytes = mark; 1067 progressmeter(-1, path); 1068 1069 /* Finally, suck down the file. */ 1070 oldinti = signal(SIGINFO, psummary); 1071 if (chunked) { 1072 error = save_chunked(fin, tls, out, buf, buflen); 1073 signal(SIGINT, oldintr); 1074 signal(SIGINFO, oldinti); 1075 if (error == -1) 1076 goto cleanup_url_get; 1077 } else { 1078 while ((len = fread(buf, 1, buflen, fin)) > 0) { 1079 bytes += len; 1080 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 1081 if ((wlen = write(out, cp, len)) == -1) { 1082 warn("Writing %s", savefile); 1083 signal(SIGINT, oldintr); 1084 signal(SIGINFO, oldinti); 1085 goto cleanup_url_get; 1086 } 1087 } 1088 if (hash && !progress) { 1089 while (bytes >= hashbytes) { 1090 (void)putc('#', ttyout); 1091 hashbytes += mark; 1092 } 1093 (void)fflush(ttyout); 1094 } 1095 } 1096 save_errno = errno; 1097 signal(SIGINT, oldintr); 1098 signal(SIGINFO, oldinti); 1099 if (hash && !progress && bytes > 0) { 1100 if (bytes < mark) 1101 (void)putc('#', ttyout); 1102 (void)putc('\n', ttyout); 1103 (void)fflush(ttyout); 1104 } 1105 if (len == 0 && ferror(fin)) { 1106 errno = save_errno; 1107 warnx("Reading from socket: %s", sockerror(tls)); 1108 goto cleanup_url_get; 1109 } 1110 } 1111 progressmeter(1, NULL); 1112 if ( 1113 #ifndef SMALL 1114 !resume && 1115 #endif /* !SMALL */ 1116 filesize != -1 && len == 0 && bytes != filesize) { 1117 if (verbose) 1118 fputs("Read short file.\n", ttyout); 1119 goto cleanup_url_get; 1120 } 1121 1122 if (verbose) 1123 ptransfer(0); 1124 1125 rval = 0; 1126 goto cleanup_url_get; 1127 1128 noftpautologin: 1129 warnx( 1130 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 1131 goto cleanup_url_get; 1132 1133 improper: 1134 warnx("Improper response from %s", host); 1135 1136 cleanup_url_get: 1137 #ifndef SMALL 1138 free(full_host); 1139 #endif /* !SMALL */ 1140 #ifndef NOSSL 1141 free(sslhost); 1142 #endif /* !NOSSL */ 1143 ftp_close(&fin, &tls, &fd); 1144 if (out >= 0 && out != fileno(stdout)) { 1145 #ifndef SMALL 1146 if (server_timestamps && lmt.tm_zone != 0) { 1147 ts[0].tv_nsec = UTIME_NOW; 1148 ts[1].tv_nsec = 0; 1149 setenv("TZ", lmt.tm_zone, 1); 1150 if (((ts[1].tv_sec = mktime(&lmt)) != -1) && 1151 (futimens(out, ts) == -1)) 1152 warnx("Unable to set file modification time"); 1153 } 1154 #endif /* !SMALL */ 1155 close(out); 1156 } 1157 free(buf); 1158 free(pathbuf); 1159 free(proxyhost); 1160 free(proxyurl); 1161 free(newline); 1162 free(credentials); 1163 free(proxy_credentials); 1164 return (rval); 1165 } 1166 1167 static int 1168 save_chunked(FILE *fin, struct tls *tls, int out, char *buf, size_t buflen) 1169 { 1170 1171 char *header, *end, *cp; 1172 unsigned long chunksize; 1173 size_t hlen, rlen, wlen; 1174 ssize_t written; 1175 char cr, lf; 1176 1177 for (;;) { 1178 header = ftp_readline(fin, &hlen); 1179 if (header == NULL) 1180 break; 1181 /* strip CRLF and any optional chunk extension */ 1182 header[strcspn(header, ";\r\n")] = '\0'; 1183 errno = 0; 1184 chunksize = strtoul(header, &end, 16); 1185 if (errno || header[0] == '\0' || *end != '\0' || 1186 chunksize > INT_MAX) { 1187 warnx("Invalid chunk size '%s'", header); 1188 free(header); 1189 return -1; 1190 } 1191 free(header); 1192 1193 if (chunksize == 0) { 1194 /* We're done. Ignore optional trailer. */ 1195 return 0; 1196 } 1197 1198 for (written = 0; chunksize != 0; chunksize -= rlen) { 1199 rlen = (chunksize < buflen) ? chunksize : buflen; 1200 rlen = fread(buf, 1, rlen, fin); 1201 if (rlen == 0) 1202 break; 1203 bytes += rlen; 1204 for (cp = buf, wlen = rlen; wlen > 0; 1205 wlen -= written, cp += written) { 1206 if ((written = write(out, cp, wlen)) == -1) { 1207 warn("Writing output file"); 1208 return -1; 1209 } 1210 } 1211 } 1212 1213 if (rlen == 0 || 1214 fread(&cr, 1, 1, fin) != 1 || 1215 fread(&lf, 1, 1, fin) != 1) 1216 break; 1217 1218 if (cr != '\r' || lf != '\n') { 1219 warnx("Invalid chunked encoding"); 1220 return -1; 1221 } 1222 } 1223 1224 if (ferror(fin)) 1225 warnx("Error while reading from socket: %s", sockerror(tls)); 1226 else 1227 warnx("Invalid chunked encoding: short read"); 1228 1229 return -1; 1230 } 1231 1232 /* 1233 * Abort a http retrieval 1234 */ 1235 /* ARGSUSED */ 1236 static void 1237 aborthttp(int signo) 1238 { 1239 const char errmsg[] = "\nfetch aborted.\n"; 1240 1241 alarmtimer(0); 1242 write(fileno(ttyout), errmsg, sizeof(errmsg) - 1); 1243 longjmp(httpabort, 1); 1244 } 1245 1246 /* 1247 * Retrieve multiple files from the command line, transferring 1248 * files of the form "host:path", "ftp://host/path" using the 1249 * ftp protocol, and files of the form "http://host/path" using 1250 * the http protocol. 1251 * If path has a trailing "/", then return (-1); 1252 * the path will be cd-ed into and the connection remains open, 1253 * and the function will return -1 (to indicate the connection 1254 * is alive). 1255 * If an error occurs the return value will be the offset+1 in 1256 * argv[] of the file that caused a problem (i.e, argv[x] 1257 * returns x+1) 1258 * Otherwise, 0 is returned if all files retrieved successfully. 1259 */ 1260 int 1261 auto_fetch(int argc, char *argv[], char *outfile) 1262 { 1263 char *xargv[5]; 1264 char *cp, *url, *host, *dir, *file, *portnum; 1265 char *username, *pass, *pathstart; 1266 char *ftpproxy, *httpproxy; 1267 int rval, xargc, lastfile; 1268 volatile int argpos; 1269 int dirhasglob, filehasglob, oautologin; 1270 char rempath[PATH_MAX]; 1271 1272 argpos = 0; 1273 1274 if (setjmp(toplevel)) { 1275 if (connected) 1276 disconnect(0, NULL); 1277 return (argpos + 1); 1278 } 1279 (void)signal(SIGINT, (sig_t)intr); 1280 (void)signal(SIGPIPE, (sig_t)lostpeer); 1281 1282 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 1283 ftpproxy = NULL; 1284 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 1285 httpproxy = NULL; 1286 1287 /* 1288 * Loop through as long as there's files to fetch. 1289 */ 1290 username = pass = NULL; 1291 for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) { 1292 if (strchr(argv[argpos], ':') == NULL) 1293 break; 1294 1295 free(username); 1296 free(pass); 1297 host = dir = file = portnum = username = pass = NULL; 1298 1299 lastfile = (argv[argpos+1] == NULL); 1300 1301 /* 1302 * We muck with the string, so we make a copy. 1303 */ 1304 url = strdup(argv[argpos]); 1305 if (url == NULL) 1306 errx(1, "Can't allocate memory for auto-fetch."); 1307 1308 if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 1309 if (file_get(url + sizeof(FILE_URL) - 1, outfile) == -1) 1310 rval = argpos + 1; 1311 continue; 1312 } 1313 1314 /* 1315 * Try HTTP URL-style arguments next. 1316 */ 1317 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1318 strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0) { 1319 redirect_loop = 0; 1320 retried = 0; 1321 if (url_get(url, httpproxy, outfile, lastfile) == -1) 1322 rval = argpos + 1; 1323 continue; 1324 } 1325 1326 /* 1327 * Try FTP URL-style arguments next. If ftpproxy is 1328 * set, use url_get() instead of standard ftp. 1329 * Finally, try host:file. 1330 */ 1331 host = url; 1332 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1333 char *passend, *passagain, *userend; 1334 1335 if (ftpproxy) { 1336 if (url_get(url, ftpproxy, outfile, lastfile) == -1) 1337 rval = argpos + 1; 1338 continue; 1339 } 1340 host += sizeof(FTP_URL) - 1; 1341 dir = strchr(host, '/'); 1342 1343 /* Look for [user:pass@]host[:port] */ 1344 1345 /* check if we have "user:pass@" */ 1346 userend = strchr(host, ':'); 1347 passend = strchr(host, '@'); 1348 if (passend && userend && userend < passend && 1349 (!dir || passend < dir)) { 1350 username = host; 1351 pass = userend + 1; 1352 host = passend + 1; 1353 *userend = *passend = '\0'; 1354 passagain = strchr(host, '@'); 1355 if (strchr(pass, '@') != NULL || 1356 (passagain != NULL && passagain < dir)) { 1357 warnx(at_encoding_warning); 1358 username = pass = NULL; 1359 goto bad_ftp_url; 1360 } 1361 1362 if (EMPTYSTRING(username)) { 1363 bad_ftp_url: 1364 warnx("Invalid URL: %s", argv[argpos]); 1365 rval = argpos + 1; 1366 username = pass = NULL; 1367 continue; 1368 } 1369 username = urldecode(username); 1370 pass = urldecode(pass); 1371 } 1372 1373 /* check [host]:port, or [host] */ 1374 if (host[0] == '[') { 1375 cp = strchr(host, ']'); 1376 if (cp && (!dir || cp < dir)) { 1377 if (cp + 1 == dir || cp[1] == ':') { 1378 host++; 1379 *cp++ = '\0'; 1380 } else 1381 cp = NULL; 1382 } else 1383 cp = host; 1384 } else 1385 cp = host; 1386 1387 /* split off host[:port] if there is */ 1388 if (cp) { 1389 portnum = strchr(cp, ':'); 1390 pathstart = strchr(cp, '/'); 1391 /* : in path is not a port # indicator */ 1392 if (portnum && pathstart && 1393 pathstart < portnum) 1394 portnum = NULL; 1395 1396 if (!portnum) 1397 ; 1398 else { 1399 if (!dir) 1400 ; 1401 else if (portnum + 1 < dir) { 1402 *portnum++ = '\0'; 1403 /* 1404 * XXX should check if portnum 1405 * is decimal number 1406 */ 1407 } else { 1408 /* empty portnum */ 1409 goto bad_ftp_url; 1410 } 1411 } 1412 } else 1413 portnum = NULL; 1414 } else { /* classic style `host:file' */ 1415 dir = strchr(host, ':'); 1416 } 1417 if (EMPTYSTRING(host)) { 1418 rval = argpos + 1; 1419 continue; 1420 } 1421 1422 /* 1423 * If dir is NULL, the file wasn't specified 1424 * (URL looked something like ftp://host) 1425 */ 1426 if (dir != NULL) 1427 *dir++ = '\0'; 1428 1429 /* 1430 * Extract the file and (if present) directory name. 1431 */ 1432 if (!EMPTYSTRING(dir)) { 1433 cp = strrchr(dir, '/'); 1434 if (cp != NULL) { 1435 *cp++ = '\0'; 1436 file = cp; 1437 } else { 1438 file = dir; 1439 dir = NULL; 1440 } 1441 } 1442 #ifndef SMALL 1443 if (debug) 1444 fprintf(ttyout, 1445 "user %s:%s host %s port %s dir %s file %s\n", 1446 username, pass ? "XXXX" : NULL, host, portnum, 1447 dir, file); 1448 #endif /* !SMALL */ 1449 1450 /* 1451 * Set up the connection. 1452 */ 1453 if (connected) 1454 disconnect(0, NULL); 1455 xargv[0] = __progname; 1456 xargv[1] = host; 1457 xargv[2] = NULL; 1458 xargc = 2; 1459 if (!EMPTYSTRING(portnum)) { 1460 xargv[2] = portnum; 1461 xargv[3] = NULL; 1462 xargc = 3; 1463 } 1464 oautologin = autologin; 1465 if (username == NULL) 1466 anonftp = 1; 1467 else { 1468 anonftp = 0; 1469 autologin = 0; 1470 } 1471 setpeer(xargc, xargv); 1472 autologin = oautologin; 1473 if (connected == 0 || 1474 (connected == 1 && autologin && (username == NULL || 1475 !ftp_login(host, username, pass)))) { 1476 warnx("Can't connect or login to host `%s'", host); 1477 rval = argpos + 1; 1478 continue; 1479 } 1480 1481 /* Always use binary transfers. */ 1482 setbinary(0, NULL); 1483 1484 dirhasglob = filehasglob = 0; 1485 if (doglob) { 1486 if (!EMPTYSTRING(dir) && 1487 strpbrk(dir, "*?[]{}") != NULL) 1488 dirhasglob = 1; 1489 if (!EMPTYSTRING(file) && 1490 strpbrk(file, "*?[]{}") != NULL) 1491 filehasglob = 1; 1492 } 1493 1494 /* Change directories, if necessary. */ 1495 if (!EMPTYSTRING(dir) && !dirhasglob) { 1496 xargv[0] = "cd"; 1497 xargv[1] = dir; 1498 xargv[2] = NULL; 1499 cd(2, xargv); 1500 if (!dirchange) { 1501 rval = argpos + 1; 1502 continue; 1503 } 1504 } 1505 1506 if (EMPTYSTRING(file)) { 1507 #ifndef SMALL 1508 rval = -1; 1509 #else /* !SMALL */ 1510 recvrequest("NLST", "-", NULL, "w", 0, 0); 1511 rval = 0; 1512 #endif /* !SMALL */ 1513 continue; 1514 } 1515 1516 if (verbose) 1517 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 1518 1519 if (dirhasglob) { 1520 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1521 file = rempath; 1522 } 1523 1524 /* Fetch the file(s). */ 1525 xargc = 2; 1526 xargv[0] = "get"; 1527 xargv[1] = file; 1528 xargv[2] = NULL; 1529 if (dirhasglob || filehasglob) { 1530 int ointeractive; 1531 1532 ointeractive = interactive; 1533 interactive = 0; 1534 xargv[0] = "mget"; 1535 #ifndef SMALL 1536 if (resume) { 1537 xargc = 3; 1538 xargv[1] = "-c"; 1539 xargv[2] = file; 1540 xargv[3] = NULL; 1541 } 1542 #endif /* !SMALL */ 1543 mget(xargc, xargv); 1544 interactive = ointeractive; 1545 } else { 1546 if (outfile != NULL) { 1547 xargv[2] = outfile; 1548 xargv[3] = NULL; 1549 xargc++; 1550 } 1551 #ifndef SMALL 1552 if (resume) 1553 reget(xargc, xargv); 1554 else 1555 #endif /* !SMALL */ 1556 get(xargc, xargv); 1557 } 1558 1559 if ((code / 100) != COMPLETE) 1560 rval = argpos + 1; 1561 } 1562 if (connected && rval != -1) 1563 disconnect(0, NULL); 1564 return (rval); 1565 } 1566 1567 char * 1568 urldecode(const char *str) 1569 { 1570 char *ret, c; 1571 int i, reallen; 1572 1573 if (str == NULL) 1574 return NULL; 1575 if ((ret = malloc(strlen(str)+1)) == NULL) 1576 err(1, "Can't allocate memory for URL decoding"); 1577 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 1578 c = str[i]; 1579 if (c == '+') { 1580 *ret = ' '; 1581 continue; 1582 } 1583 1584 /* Cannot use strtol here because next char 1585 * after %xx may be a digit. 1586 */ 1587 if (c == '%' && isxdigit((unsigned char)str[i+1]) && 1588 isxdigit((unsigned char)str[i+2])) { 1589 *ret = hextochar(&str[i+1]); 1590 i+=2; 1591 continue; 1592 } 1593 *ret = c; 1594 } 1595 *ret = '\0'; 1596 1597 return ret-reallen; 1598 } 1599 1600 static char * 1601 recode_credentials(const char *userinfo) 1602 { 1603 char *ui, *creds; 1604 size_t ulen, credsize; 1605 1606 /* url-decode the user and pass */ 1607 ui = urldecode(userinfo); 1608 1609 ulen = strlen(ui); 1610 credsize = (ulen + 2) / 3 * 4 + 1; 1611 creds = malloc(credsize); 1612 if (creds == NULL) 1613 errx(1, "out of memory"); 1614 if (b64_ntop(ui, ulen, creds, credsize) == -1) 1615 errx(1, "error in base64 encoding"); 1616 free(ui); 1617 return (creds); 1618 } 1619 1620 static char 1621 hextochar(const char *str) 1622 { 1623 unsigned char c, ret; 1624 1625 c = str[0]; 1626 ret = c; 1627 if (isalpha(c)) 1628 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1629 else 1630 ret -= '0'; 1631 ret *= 16; 1632 1633 c = str[1]; 1634 ret += c; 1635 if (isalpha(c)) 1636 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1637 else 1638 ret -= '0'; 1639 return ret; 1640 } 1641 1642 int 1643 isurl(const char *p) 1644 { 1645 1646 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 1647 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1648 #ifndef NOSSL 1649 strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 || 1650 #endif /* !NOSSL */ 1651 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 1652 strstr(p, ":/")) 1653 return (1); 1654 return (0); 1655 } 1656 1657 static char * 1658 ftp_readline(FILE *fp, size_t *lenp) 1659 { 1660 return fparseln(fp, lenp, NULL, "\0\0\0", 0); 1661 } 1662 1663 #ifndef SMALL 1664 static int 1665 ftp_printf(FILE *fp, const char *fmt, ...) 1666 { 1667 va_list ap; 1668 int ret; 1669 1670 va_start(ap, fmt); 1671 ret = vfprintf(fp, fmt, ap); 1672 va_end(ap); 1673 1674 if (debug) { 1675 va_start(ap, fmt); 1676 vfprintf(ttyout, fmt, ap); 1677 va_end(ap); 1678 } 1679 1680 return ret; 1681 } 1682 #endif /* !SMALL */ 1683 1684 static void 1685 ftp_close(FILE **fin, struct tls **tls, int *fd) 1686 { 1687 #ifndef NOSSL 1688 int ret; 1689 1690 if (*tls != NULL) { 1691 if (tls_session_fd != -1) 1692 dprintf(STDERR_FILENO, "tls session resumed: %s\n", 1693 tls_conn_session_resumed(*tls) ? "yes" : "no"); 1694 do { 1695 ret = tls_close(*tls); 1696 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1697 tls_free(*tls); 1698 *tls = NULL; 1699 } 1700 if (*fd != -1) { 1701 close(*fd); 1702 *fd = -1; 1703 } 1704 #endif 1705 if (*fin != NULL) { 1706 fclose(*fin); 1707 *fin = NULL; 1708 } 1709 } 1710 1711 static const char * 1712 sockerror(struct tls *tls) 1713 { 1714 int save_errno = errno; 1715 #ifndef NOSSL 1716 if (tls != NULL) { 1717 const char *tlserr = tls_error(tls); 1718 if (tlserr != NULL) 1719 return tlserr; 1720 } 1721 #endif 1722 return strerror(save_errno); 1723 } 1724 1725 #ifndef NOSSL 1726 static int 1727 proxy_connect(int socket, char *host, char *cookie) 1728 { 1729 int l; 1730 char buf[1024]; 1731 char *connstr, *hosttail, *port; 1732 1733 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 1734 (hosttail[1] == '\0' || hosttail[1] == ':')) { 1735 host++; 1736 *hosttail++ = '\0'; 1737 } else 1738 hosttail = host; 1739 1740 port = strrchr(hosttail, ':'); /* find portnum */ 1741 if (port != NULL) 1742 *port++ = '\0'; 1743 if (!port) 1744 port = "443"; 1745 1746 if (cookie) { 1747 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1748 "Proxy-Authorization: Basic %s\r\n%s\r\n\r\n", 1749 host, port, cookie, HTTP_USER_AGENT); 1750 } else { 1751 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n%s\r\n\r\n", 1752 host, port, HTTP_USER_AGENT); 1753 } 1754 1755 if (l == -1) 1756 errx(1, "Could not allocate memory to assemble connect string!"); 1757 #ifndef SMALL 1758 if (debug) 1759 printf("%s", connstr); 1760 #endif /* !SMALL */ 1761 if (write(socket, connstr, l) != l) 1762 err(1, "Could not send connect string"); 1763 read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */ 1764 free(connstr); 1765 return(200); 1766 } 1767 1768 static int 1769 stdio_tls_write_wrapper(void *arg, const char *buf, int len) 1770 { 1771 struct tls *tls = arg; 1772 ssize_t ret; 1773 1774 do { 1775 ret = tls_write(tls, buf, len); 1776 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1777 1778 return ret; 1779 } 1780 1781 static int 1782 stdio_tls_read_wrapper(void *arg, char *buf, int len) 1783 { 1784 struct tls *tls = arg; 1785 ssize_t ret; 1786 1787 do { 1788 ret = tls_read(tls, buf, len); 1789 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1790 1791 return ret; 1792 } 1793 #endif /* !NOSSL */ 1794