1 /* $OpenBSD: fetch.c,v 1.199 2021/01/01 17:39:54 chrisz 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 62 #ifndef NOSSL 63 #include <tls.h> 64 #else /* !NOSSL */ 65 struct tls; 66 #endif /* !NOSSL */ 67 68 #include "ftp_var.h" 69 #include "cmds.h" 70 71 static int file_get(const char *, const char *); 72 static int url_get(const char *, const char *, const char *, int); 73 static int save_chunked(FILE *, struct tls *, int , char *, size_t); 74 static void aborthttp(int); 75 static char hextochar(const char *); 76 static char *urldecode(const char *); 77 static char *recode_credentials(const char *_userinfo); 78 static char *ftp_readline(FILE *, size_t *); 79 static void ftp_close(FILE **, struct tls **, int *); 80 static const char *sockerror(struct tls *); 81 #ifdef SMALL 82 #define ftp_printf(fp, ...) fprintf(fp, __VA_ARGS__) 83 #else 84 static int ftp_printf(FILE *, const char *, ...); 85 #endif /* SMALL */ 86 #ifndef NOSSL 87 static int proxy_connect(int, char *, char *); 88 static int stdio_tls_write_wrapper(void *, const char *, int); 89 static int stdio_tls_read_wrapper(void *, char *, int); 90 #endif /* !NOSSL */ 91 92 #define FTP_URL "ftp://" /* ftp URL prefix */ 93 #define HTTP_URL "http://" /* http URL prefix */ 94 #define HTTPS_URL "https://" /* https URL prefix */ 95 #define FILE_URL "file:" /* file URL prefix */ 96 #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */ 97 #define HTTP_PROXY "http_proxy" /* env var with http proxy location */ 98 99 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 100 101 static const char at_encoding_warning[] = 102 "Extra `@' characters in usernames and passwords should be encoded as %%40"; 103 104 static jmp_buf httpabort; 105 106 static int redirect_loop; 107 static int retried; 108 109 /* 110 * Determine whether the character needs encoding, per RFC1738: 111 * - No corresponding graphic US-ASCII. 112 * - Unsafe characters. 113 */ 114 static int 115 unsafe_char(const char *c0) 116 { 117 const char *unsafe_chars = " <>\"#{}|\\^~[]`"; 118 const unsigned char *c = (const unsigned char *)c0; 119 120 /* 121 * No corresponding graphic US-ASCII. 122 * Control characters and octets not used in US-ASCII. 123 */ 124 return (iscntrl(*c) || !isascii(*c) || 125 126 /* 127 * Unsafe characters. 128 * '%' is also unsafe, if is not followed by two 129 * hexadecimal digits. 130 */ 131 strchr(unsafe_chars, *c) != NULL || 132 (*c == '%' && (!isxdigit(*++c) || !isxdigit(*++c)))); 133 } 134 135 /* 136 * Encode given URL, per RFC1738. 137 * Allocate and return string to the caller. 138 */ 139 static char * 140 url_encode(const char *path) 141 { 142 size_t i, length, new_length; 143 char *epath, *epathp; 144 145 length = new_length = strlen(path); 146 147 /* 148 * First pass: 149 * Count unsafe characters, and determine length of the 150 * final URL. 151 */ 152 for (i = 0; i < length; i++) 153 if (unsafe_char(path + i)) 154 new_length += 2; 155 156 epath = epathp = malloc(new_length + 1); /* One more for '\0'. */ 157 if (epath == NULL) 158 err(1, "Can't allocate memory for URL encoding"); 159 160 /* 161 * Second pass: 162 * Encode, and copy final URL. 163 */ 164 for (i = 0; i < length; i++) 165 if (unsafe_char(path + i)) { 166 snprintf(epathp, 4, "%%" "%02x", 167 (unsigned char)path[i]); 168 epathp += 3; 169 } else 170 *(epathp++) = path[i]; 171 172 *epathp = '\0'; 173 return (epath); 174 } 175 176 /* ARGSUSED */ 177 static void 178 tooslow(int signo) 179 { 180 dprintf(STDERR_FILENO, "%s: connect taking too long\n", __progname); 181 _exit(2); 182 } 183 184 /* 185 * Copy a local file (used by the OpenBSD installer). 186 * Returns -1 on failure, 0 on success 187 */ 188 static int 189 file_get(const char *path, const char *outfile) 190 { 191 struct stat st; 192 int fd, out = -1, rval = -1, save_errno; 193 volatile sig_t oldintr, oldinti; 194 const char *savefile; 195 char *buf = NULL, *cp, *pathbuf = NULL; 196 const size_t buflen = 128 * 1024; 197 off_t hashbytes; 198 ssize_t len, wlen; 199 200 direction = "received"; 201 202 fd = open(path, O_RDONLY); 203 if (fd == -1) { 204 warn("Can't open file %s", path); 205 return -1; 206 } 207 208 if (fstat(fd, &st) == -1) 209 filesize = -1; 210 else 211 filesize = st.st_size; 212 213 if (outfile != NULL) 214 savefile = outfile; 215 else { 216 if (path[strlen(path) - 1] == '/') /* Consider no file */ 217 savefile = NULL; /* after dir invalid. */ 218 else { 219 pathbuf = strdup(path); 220 if (pathbuf == NULL) 221 errx(1, "Can't allocate memory for filename"); 222 savefile = basename(pathbuf); 223 } 224 } 225 226 if (EMPTYSTRING(savefile)) { 227 warnx("No filename after directory (use -o): %s", path); 228 goto cleanup_copy; 229 } 230 231 /* Open the output file. */ 232 if (!pipeout) { 233 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666); 234 if (out == -1) { 235 warn("Can't open %s", savefile); 236 goto cleanup_copy; 237 } 238 } else 239 out = fileno(stdout); 240 241 if ((buf = malloc(buflen)) == NULL) 242 errx(1, "Can't allocate memory for transfer buffer"); 243 244 /* Trap signals */ 245 oldintr = NULL; 246 oldinti = NULL; 247 if (setjmp(httpabort)) { 248 if (oldintr) 249 (void)signal(SIGINT, oldintr); 250 if (oldinti) 251 (void)signal(SIGINFO, oldinti); 252 goto cleanup_copy; 253 } 254 oldintr = signal(SIGINT, aborthttp); 255 256 bytes = 0; 257 hashbytes = mark; 258 progressmeter(-1, path); 259 260 /* Finally, suck down the file. */ 261 oldinti = signal(SIGINFO, psummary); 262 while ((len = read(fd, buf, buflen)) > 0) { 263 bytes += len; 264 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 265 if ((wlen = write(out, cp, len)) == -1) { 266 warn("Writing %s", savefile); 267 signal(SIGINT, oldintr); 268 signal(SIGINFO, oldinti); 269 goto cleanup_copy; 270 } 271 } 272 if (hash && !progress) { 273 while (bytes >= hashbytes) { 274 (void)putc('#', ttyout); 275 hashbytes += mark; 276 } 277 (void)fflush(ttyout); 278 } 279 } 280 save_errno = errno; 281 signal(SIGINT, oldintr); 282 signal(SIGINFO, oldinti); 283 if (hash && !progress && bytes > 0) { 284 if (bytes < mark) 285 (void)putc('#', ttyout); 286 (void)putc('\n', ttyout); 287 (void)fflush(ttyout); 288 } 289 if (len == -1) { 290 warnc(save_errno, "Reading from file"); 291 goto cleanup_copy; 292 } 293 progressmeter(1, NULL); 294 if (verbose) 295 ptransfer(0); 296 297 rval = 0; 298 299 cleanup_copy: 300 free(buf); 301 free(pathbuf); 302 if (out >= 0 && out != fileno(stdout)) 303 close(out); 304 close(fd); 305 306 return rval; 307 } 308 309 /* 310 * Retrieve URL, via the proxy in $proxyvar if necessary. 311 * Returns -1 on failure, 0 on success 312 */ 313 static int 314 url_get(const char *origline, const char *proxyenv, const char *outfile, int lastfile) 315 { 316 char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST], *cp, *portnum, *path, ststr[4]; 317 char *hosttail, *cause = "unknown", *newline, *host, *port, *buf = NULL; 318 char *epath, *redirurl, *loctail, *h, *p, gerror[200]; 319 int error, isftpurl = 0, isredirect = 0, rval = -1; 320 int isunavail = 0, retryafter = -1; 321 struct addrinfo hints, *res0, *res; 322 const char *savefile; 323 char *pathbuf = NULL; 324 char *proxyurl = NULL; 325 char *credentials = NULL, *proxy_credentials = NULL; 326 int fd = -1, out = -1; 327 volatile sig_t oldintr, oldinti; 328 FILE *fin = NULL; 329 off_t hashbytes; 330 const char *errstr; 331 ssize_t len, wlen; 332 char *proxyhost = NULL; 333 #ifndef NOSSL 334 char *sslpath = NULL, *sslhost = NULL; 335 int ishttpsurl = 0; 336 #endif /* !NOSSL */ 337 #ifndef SMALL 338 char *full_host = NULL; 339 const char *scheme; 340 char *locbase; 341 struct addrinfo *ares = NULL; 342 #endif /* !SMALL */ 343 struct tls *tls = NULL; 344 int status; 345 int save_errno; 346 const size_t buflen = 128 * 1024; 347 int chunked = 0; 348 349 direction = "received"; 350 351 newline = strdup(origline); 352 if (newline == NULL) 353 errx(1, "Can't allocate memory to parse URL"); 354 if (strncasecmp(newline, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 355 host = newline + sizeof(HTTP_URL) - 1; 356 #ifndef SMALL 357 scheme = HTTP_URL; 358 #endif /* !SMALL */ 359 } else if (strncasecmp(newline, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 360 host = newline + sizeof(FTP_URL) - 1; 361 isftpurl = 1; 362 #ifndef SMALL 363 scheme = FTP_URL; 364 #endif /* !SMALL */ 365 } else if (strncasecmp(newline, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0) { 366 #ifndef NOSSL 367 host = newline + sizeof(HTTPS_URL) - 1; 368 ishttpsurl = 1; 369 #else 370 errx(1, "%s: No HTTPS support", newline); 371 #endif /* !NOSSL */ 372 #ifndef SMALL 373 scheme = HTTPS_URL; 374 #endif /* !SMALL */ 375 } else 376 errx(1, "%s: URL not permitted", newline); 377 378 path = strchr(host, '/'); /* Find path */ 379 380 /* 381 * Look for auth header in host. 382 * Basic auth from RFC 2617, valid characters for path are in 383 * RFC 3986 section 3.3. 384 */ 385 if (!isftpurl) { 386 p = strchr(host, '@'); 387 if (p != NULL && (path == NULL || p < path)) { 388 *p++ = '\0'; 389 credentials = recode_credentials(host); 390 391 /* Overwrite userinfo */ 392 memmove(host, p, strlen(p) + 1); 393 path = strchr(host, '/'); 394 } 395 } 396 397 if (EMPTYSTRING(path)) { 398 if (outfile) { /* No slash, but */ 399 path = strchr(host,'\0'); /* we have outfile. */ 400 goto noslash; 401 } 402 if (isftpurl) 403 goto noftpautologin; 404 warnx("No `/' after host (use -o): %s", origline); 405 goto cleanup_url_get; 406 } 407 *path++ = '\0'; 408 if (EMPTYSTRING(path) && !outfile) { 409 if (isftpurl) 410 goto noftpautologin; 411 warnx("No filename after host (use -o): %s", origline); 412 goto cleanup_url_get; 413 } 414 415 noslash: 416 if (outfile) 417 savefile = outfile; 418 else { 419 if (path[strlen(path) - 1] == '/') /* Consider no file */ 420 savefile = NULL; /* after dir invalid. */ 421 else { 422 pathbuf = strdup(path); 423 if (pathbuf == NULL) 424 errx(1, "Can't allocate memory for filename"); 425 savefile = basename(pathbuf); 426 } 427 } 428 429 if (EMPTYSTRING(savefile)) { 430 if (isftpurl) 431 goto noftpautologin; 432 warnx("No filename after directory (use -o): %s", origline); 433 goto cleanup_url_get; 434 } 435 436 #ifndef SMALL 437 if (resume && pipeout) { 438 warnx("can't append to stdout"); 439 goto cleanup_url_get; 440 } 441 #endif /* !SMALL */ 442 443 if (proxyenv != NULL) { /* use proxy */ 444 #ifndef NOSSL 445 if (ishttpsurl) { 446 sslpath = strdup(path); 447 sslhost = strdup(host); 448 if (! sslpath || ! sslhost) 449 errx(1, "Can't allocate memory for https path/host."); 450 } 451 #endif /* !NOSSL */ 452 proxyhost = strdup(host); 453 if (proxyhost == NULL) 454 errx(1, "Can't allocate memory for proxy host."); 455 proxyurl = strdup(proxyenv); 456 if (proxyurl == NULL) 457 errx(1, "Can't allocate memory for proxy URL."); 458 if (strncasecmp(proxyurl, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 459 host = proxyurl + sizeof(HTTP_URL) - 1; 460 else if (strncasecmp(proxyurl, FTP_URL, sizeof(FTP_URL) - 1) == 0) 461 host = proxyurl + sizeof(FTP_URL) - 1; 462 else { 463 warnx("Malformed proxy URL: %s", proxyenv); 464 goto cleanup_url_get; 465 } 466 if (EMPTYSTRING(host)) { 467 warnx("Malformed proxy URL: %s", proxyenv); 468 goto cleanup_url_get; 469 } 470 if (*--path == '\0') 471 *path = '/'; /* add / back to real path */ 472 path = strchr(host, '/'); /* remove trailing / on host */ 473 if (!EMPTYSTRING(path)) 474 *path++ = '\0'; /* i guess this ++ is useless */ 475 476 path = strchr(host, '@'); /* look for credentials in proxy */ 477 if (!EMPTYSTRING(path)) { 478 *path = '\0'; 479 if (strchr(host, ':') == NULL) { 480 warnx("Malformed proxy URL: %s", proxyenv); 481 goto cleanup_url_get; 482 } 483 proxy_credentials = recode_credentials(host); 484 *path = '@'; /* restore @ in proxyurl */ 485 486 /* 487 * This removes the password from proxyurl, 488 * filling with stars 489 */ 490 for (host = 1 + strchr(proxyurl + 5, ':'); *host != '@'; 491 host++) 492 *host = '*'; 493 494 host = path + 1; 495 } 496 497 path = newline; 498 } 499 500 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 501 (hosttail[1] == '\0' || hosttail[1] == ':')) { 502 host++; 503 *hosttail++ = '\0'; 504 #ifndef SMALL 505 if (asprintf(&full_host, "[%s]", host) == -1) 506 errx(1, "Cannot allocate memory for hostname"); 507 #endif /* !SMALL */ 508 } else 509 hosttail = host; 510 511 portnum = strrchr(hosttail, ':'); /* find portnum */ 512 if (portnum != NULL) 513 *portnum++ = '\0'; 514 #ifndef NOSSL 515 port = portnum ? portnum : (ishttpsurl ? httpsport : httpport); 516 #else /* !NOSSL */ 517 port = portnum ? portnum : httpport; 518 #endif /* !NOSSL */ 519 520 #ifndef SMALL 521 if (full_host == NULL) 522 if ((full_host = strdup(host)) == NULL) 523 errx(1, "Cannot allocate memory for hostname"); 524 if (debug) 525 fprintf(ttyout, "host %s, port %s, path %s, " 526 "save as %s, auth %s.\n", host, port, path, 527 savefile, credentials ? credentials : "none"); 528 #endif /* !SMALL */ 529 530 memset(&hints, 0, sizeof(hints)); 531 hints.ai_family = family; 532 hints.ai_socktype = SOCK_STREAM; 533 error = getaddrinfo(host, port, &hints, &res0); 534 /* 535 * If the services file is corrupt/missing, fall back 536 * on our hard-coded defines. 537 */ 538 if (error == EAI_SERVICE && port == httpport) { 539 snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT); 540 error = getaddrinfo(host, pbuf, &hints, &res0); 541 #ifndef NOSSL 542 } else if (error == EAI_SERVICE && port == httpsport) { 543 snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT); 544 error = getaddrinfo(host, pbuf, &hints, &res0); 545 #endif /* !NOSSL */ 546 } 547 if (error) { 548 warnx("%s: %s", host, gai_strerror(error)); 549 goto cleanup_url_get; 550 } 551 552 #ifndef SMALL 553 if (srcaddr) { 554 hints.ai_flags |= AI_NUMERICHOST; 555 error = getaddrinfo(srcaddr, NULL, &hints, &ares); 556 if (error) { 557 warnx("%s: %s", srcaddr, gai_strerror(error)); 558 goto cleanup_url_get; 559 } 560 } 561 #endif /* !SMALL */ 562 563 /* ensure consistent order of the output */ 564 if (verbose) 565 setvbuf(ttyout, NULL, _IOLBF, 0); 566 567 fd = -1; 568 for (res = res0; res; res = res->ai_next) { 569 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 570 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 571 strlcpy(hbuf, "(unknown)", sizeof(hbuf)); 572 if (verbose) 573 fprintf(ttyout, "Trying %s...\n", hbuf); 574 575 fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 576 if (fd == -1) { 577 cause = "socket"; 578 continue; 579 } 580 581 #ifndef SMALL 582 if (srcaddr) { 583 if (ares->ai_family != res->ai_family) { 584 close(fd); 585 fd = -1; 586 errno = EINVAL; 587 cause = "bind"; 588 continue; 589 } 590 if (bind(fd, ares->ai_addr, ares->ai_addrlen) == -1) { 591 save_errno = errno; 592 close(fd); 593 errno = save_errno; 594 fd = -1; 595 cause = "bind"; 596 continue; 597 } 598 } 599 #endif /* !SMALL */ 600 601 if (connect_timeout) { 602 (void)signal(SIGALRM, tooslow); 603 alarmtimer(connect_timeout); 604 } 605 606 for (error = connect(fd, res->ai_addr, res->ai_addrlen); 607 error != 0 && errno == EINTR; error = connect_wait(fd)) 608 continue; 609 if (error != 0) { 610 save_errno = errno; 611 close(fd); 612 errno = save_errno; 613 fd = -1; 614 cause = "connect"; 615 continue; 616 } 617 618 /* get port in numeric */ 619 if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0, 620 pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0) 621 port = pbuf; 622 else 623 port = NULL; 624 625 #ifndef NOSSL 626 if (proxyenv && sslhost) 627 proxy_connect(fd, sslhost, proxy_credentials); 628 #endif /* !NOSSL */ 629 break; 630 } 631 freeaddrinfo(res0); 632 #ifndef SMALL 633 if (srcaddr) 634 freeaddrinfo(ares); 635 #endif /* !SMALL */ 636 if (fd < 0) { 637 warn("%s", cause); 638 goto cleanup_url_get; 639 } 640 641 #ifndef NOSSL 642 if (ishttpsurl) { 643 ssize_t ret; 644 if (proxyenv && sslpath) { 645 ishttpsurl = 0; 646 proxyurl = NULL; 647 path = sslpath; 648 } 649 if (sslhost == NULL) { 650 sslhost = strdup(host); 651 if (sslhost == NULL) 652 errx(1, "Can't allocate memory for https host."); 653 } 654 if ((tls = tls_client()) == NULL) { 655 fprintf(ttyout, "failed to create SSL client\n"); 656 goto cleanup_url_get; 657 } 658 if (tls_configure(tls, tls_config) != 0) { 659 fprintf(ttyout, "TLS configuration failure: %s\n", 660 tls_error(tls)); 661 goto cleanup_url_get; 662 } 663 if (tls_connect_socket(tls, fd, sslhost) != 0) { 664 fprintf(ttyout, "TLS connect failure: %s\n", tls_error(tls)); 665 goto cleanup_url_get; 666 } 667 do { 668 ret = tls_handshake(tls); 669 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 670 if (ret != 0) { 671 fprintf(ttyout, "TLS handshake failure: %s\n", tls_error(tls)); 672 goto cleanup_url_get; 673 } 674 fin = funopen(tls, stdio_tls_read_wrapper, 675 stdio_tls_write_wrapper, NULL, NULL); 676 } else { 677 fin = fdopen(fd, "r+"); 678 fd = -1; 679 } 680 #else /* !NOSSL */ 681 fin = fdopen(fd, "r+"); 682 fd = -1; 683 #endif /* !NOSSL */ 684 685 #ifdef SMALL 686 if (lastfile) { 687 if (pipeout) { 688 if (pledge("stdio rpath inet dns tty", NULL) == -1) 689 err(1, "pledge"); 690 } else { 691 if (pledge("stdio rpath wpath cpath inet dns tty", NULL) == -1) 692 err(1, "pledge"); 693 } 694 } 695 #endif 696 697 if (connect_timeout) { 698 signal(SIGALRM, SIG_DFL); 699 alarmtimer(0); 700 } 701 702 /* 703 * Construct and send the request. Proxy requests don't want leading /. 704 */ 705 #ifndef NOSSL 706 cookie_get(host, path, ishttpsurl, &buf); 707 #endif /* !NOSSL */ 708 709 epath = url_encode(path); 710 if (proxyurl) { 711 if (verbose) { 712 fprintf(ttyout, "Requesting %s (via %s)\n", 713 origline, proxyurl); 714 } 715 /* 716 * Host: directive must use the destination host address for 717 * the original URI (path). 718 */ 719 ftp_printf(fin, "GET %s HTTP/1.1\r\n" 720 "Connection: close\r\n" 721 "Host: %s\r\n%s%s\r\n", 722 epath, proxyhost, buf ? buf : "", httpuseragent); 723 if (credentials) 724 ftp_printf(fin, "Authorization: Basic %s\r\n", 725 credentials); 726 if (proxy_credentials) 727 ftp_printf(fin, "Proxy-Authorization: Basic %s\r\n", 728 proxy_credentials); 729 ftp_printf(fin, "\r\n"); 730 } else { 731 if (verbose) 732 fprintf(ttyout, "Requesting %s\n", origline); 733 #ifndef SMALL 734 if (resume) { 735 struct stat stbuf; 736 737 if (stat(savefile, &stbuf) == 0) 738 restart_point = stbuf.st_size; 739 else 740 restart_point = 0; 741 } 742 #endif /* SMALL */ 743 ftp_printf(fin, 744 "GET /%s HTTP/1.1\r\n" 745 "Connection: close\r\n" 746 "Host: ", epath); 747 if (proxyhost) { 748 ftp_printf(fin, "%s", proxyhost); 749 port = NULL; 750 } else if (strchr(host, ':')) { 751 /* 752 * strip off scoped address portion, since it's 753 * local to node 754 */ 755 h = strdup(host); 756 if (h == NULL) 757 errx(1, "Can't allocate memory."); 758 if ((p = strchr(h, '%')) != NULL) 759 *p = '\0'; 760 ftp_printf(fin, "[%s]", h); 761 free(h); 762 } else 763 ftp_printf(fin, "%s", host); 764 765 /* 766 * Send port number only if it's specified and does not equal 767 * 80. Some broken HTTP servers get confused if you explicitly 768 * send them the port number. 769 */ 770 #ifndef NOSSL 771 if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0) 772 ftp_printf(fin, ":%s", port); 773 if (restart_point) 774 ftp_printf(fin, "\r\nRange: bytes=%lld-", 775 (long long)restart_point); 776 #else /* !NOSSL */ 777 if (port && strcmp(port, "80") != 0) 778 ftp_printf(fin, ":%s", port); 779 #endif /* !NOSSL */ 780 ftp_printf(fin, "\r\n%s%s\r\n", 781 buf ? buf : "", httpuseragent); 782 if (credentials) 783 ftp_printf(fin, "Authorization: Basic %s\r\n", 784 credentials); 785 ftp_printf(fin, "\r\n"); 786 } 787 free(epath); 788 789 #ifndef NOSSL 790 free(buf); 791 #endif /* !NOSSL */ 792 buf = NULL; 793 794 if (fflush(fin) == EOF) { 795 warnx("Writing HTTP request: %s", sockerror(tls)); 796 goto cleanup_url_get; 797 } 798 if ((buf = ftp_readline(fin, &len)) == NULL) { 799 warnx("Receiving HTTP reply: %s", sockerror(tls)); 800 goto cleanup_url_get; 801 } 802 803 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 804 buf[--len] = '\0'; 805 #ifndef SMALL 806 if (debug) 807 fprintf(ttyout, "received '%s'\n", buf); 808 #endif /* !SMALL */ 809 810 cp = strchr(buf, ' '); 811 if (cp == NULL) 812 goto improper; 813 else 814 cp++; 815 816 strlcpy(ststr, cp, sizeof(ststr)); 817 status = strtonum(ststr, 200, 503, &errstr); 818 if (errstr) { 819 strnvis(gerror, cp, sizeof gerror, VIS_SAFE); 820 warnx("Error retrieving %s: %s", origline, gerror); 821 goto cleanup_url_get; 822 } 823 824 switch (status) { 825 case 200: /* OK */ 826 #ifndef SMALL 827 /* 828 * When we request a partial file, and we receive an HTTP 200 829 * it is a good indication that the server doesn't support 830 * range requests, and is about to send us the entire file. 831 * If the restart_point == 0, then we are not actually 832 * requesting a partial file, and an HTTP 200 is appropriate. 833 */ 834 if (resume && restart_point != 0) { 835 warnx("Server does not support resume."); 836 restart_point = resume = 0; 837 } 838 /* FALLTHROUGH */ 839 case 206: /* Partial Content */ 840 #endif /* !SMALL */ 841 break; 842 case 301: /* Moved Permanently */ 843 case 302: /* Found */ 844 case 303: /* See Other */ 845 case 307: /* Temporary Redirect */ 846 case 308: /* Permanent Redirect (RFC 7538) */ 847 isredirect++; 848 if (redirect_loop++ > 10) { 849 warnx("Too many redirections requested"); 850 goto cleanup_url_get; 851 } 852 break; 853 #ifndef SMALL 854 case 416: /* Requested Range Not Satisfiable */ 855 warnx("File is already fully retrieved."); 856 goto cleanup_url_get; 857 #endif /* !SMALL */ 858 case 503: 859 isunavail = 1; 860 break; 861 default: 862 strnvis(gerror, cp, sizeof gerror, VIS_SAFE); 863 warnx("Error retrieving %s: %s", origline, gerror); 864 goto cleanup_url_get; 865 } 866 867 /* 868 * Read the rest of the header. 869 */ 870 free(buf); 871 filesize = -1; 872 873 for (;;) { 874 if ((buf = ftp_readline(fin, &len)) == NULL) { 875 warnx("Receiving HTTP reply: %s", sockerror(tls)); 876 goto cleanup_url_get; 877 } 878 879 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 880 buf[--len] = '\0'; 881 if (len == 0) 882 break; 883 #ifndef SMALL 884 if (debug) 885 fprintf(ttyout, "received '%s'\n", buf); 886 #endif /* !SMALL */ 887 888 /* Look for some headers */ 889 cp = buf; 890 #define CONTENTLEN "Content-Length: " 891 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 892 size_t s; 893 cp += sizeof(CONTENTLEN) - 1; 894 if ((s = strcspn(cp, " \t"))) 895 *(cp+s) = 0; 896 filesize = strtonum(cp, 0, LLONG_MAX, &errstr); 897 if (errstr != NULL) 898 goto improper; 899 #ifndef SMALL 900 if (restart_point) 901 filesize += restart_point; 902 #endif /* !SMALL */ 903 #define LOCATION "Location: " 904 } else if (isredirect && 905 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 906 cp += sizeof(LOCATION) - 1; 907 /* 908 * If there is a colon before the first slash, this URI 909 * is not relative. RFC 3986 4.2 910 */ 911 if (cp[strcspn(cp, ":/")] != ':') { 912 #ifdef SMALL 913 errx(1, "Relative redirect not supported"); 914 #else /* SMALL */ 915 /* XXX doesn't handle protocol-relative URIs */ 916 if (*cp == '/') { 917 locbase = NULL; 918 cp++; 919 } else { 920 locbase = strdup(path); 921 if (locbase == NULL) 922 errx(1, "Can't allocate memory" 923 " for location base"); 924 loctail = strchr(locbase, '#'); 925 if (loctail != NULL) 926 *loctail = '\0'; 927 loctail = strchr(locbase, '?'); 928 if (loctail != NULL) 929 *loctail = '\0'; 930 loctail = strrchr(locbase, '/'); 931 if (loctail == NULL) { 932 free(locbase); 933 locbase = NULL; 934 } else 935 loctail[1] = '\0'; 936 } 937 /* Contruct URL from relative redirect */ 938 if (asprintf(&redirurl, "%s%s%s%s/%s%s", 939 scheme, full_host, 940 portnum ? ":" : "", 941 portnum ? portnum : "", 942 locbase ? locbase : "", 943 cp) == -1) 944 errx(1, "Cannot build " 945 "redirect URL"); 946 free(locbase); 947 #endif /* SMALL */ 948 } else if ((redirurl = strdup(cp)) == NULL) 949 errx(1, "Cannot allocate memory for URL"); 950 loctail = strchr(redirurl, '#'); 951 if (loctail != NULL) 952 *loctail = '\0'; 953 if (verbose) 954 fprintf(ttyout, "Redirected to %s\n", redirurl); 955 ftp_close(&fin, &tls, &fd); 956 rval = url_get(redirurl, proxyenv, savefile, lastfile); 957 free(redirurl); 958 goto cleanup_url_get; 959 #define RETRYAFTER "Retry-After: " 960 } else if (isunavail && 961 strncasecmp(cp, RETRYAFTER, sizeof(RETRYAFTER) - 1) == 0) { 962 size_t s; 963 cp += sizeof(RETRYAFTER) - 1; 964 if ((s = strcspn(cp, " \t"))) 965 cp[s] = '\0'; 966 retryafter = strtonum(cp, 0, 0, &errstr); 967 if (errstr != NULL) 968 retryafter = -1; 969 #define TRANSFER_ENCODING "Transfer-Encoding: " 970 } else if (strncasecmp(cp, TRANSFER_ENCODING, 971 sizeof(TRANSFER_ENCODING) - 1) == 0) { 972 cp += sizeof(TRANSFER_ENCODING) - 1; 973 cp[strcspn(cp, " \t")] = '\0'; 974 if (strcasecmp(cp, "chunked") == 0) 975 chunked = 1; 976 } 977 free(buf); 978 } 979 980 /* Content-Length should be ignored for Transfer-Encoding: chunked */ 981 if (chunked) 982 filesize = -1; 983 984 if (isunavail) { 985 if (retried || retryafter != 0) 986 warnx("Error retrieving %s: 503 Service Unavailable", 987 origline); 988 else { 989 if (verbose) 990 fprintf(ttyout, "Retrying %s\n", origline); 991 retried = 1; 992 ftp_close(&fin, &tls, &fd); 993 rval = url_get(origline, proxyenv, savefile, lastfile); 994 } 995 goto cleanup_url_get; 996 } 997 998 /* Open the output file. */ 999 if (!pipeout) { 1000 #ifndef SMALL 1001 if (resume) 1002 out = open(savefile, O_CREAT | O_WRONLY | O_APPEND, 1003 0666); 1004 else 1005 #endif /* !SMALL */ 1006 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 1007 0666); 1008 if (out == -1) { 1009 warn("Can't open %s", savefile); 1010 goto cleanup_url_get; 1011 } 1012 } else { 1013 out = fileno(stdout); 1014 #ifdef SMALL 1015 if (lastfile) { 1016 if (pledge("stdio tty", NULL) == -1) 1017 err(1, "pledge"); 1018 } 1019 #endif 1020 } 1021 1022 free(buf); 1023 if ((buf = malloc(buflen)) == NULL) 1024 errx(1, "Can't allocate memory for transfer buffer"); 1025 1026 /* Trap signals */ 1027 oldintr = NULL; 1028 oldinti = NULL; 1029 if (setjmp(httpabort)) { 1030 if (oldintr) 1031 (void)signal(SIGINT, oldintr); 1032 if (oldinti) 1033 (void)signal(SIGINFO, oldinti); 1034 goto cleanup_url_get; 1035 } 1036 oldintr = signal(SIGINT, aborthttp); 1037 1038 bytes = 0; 1039 hashbytes = mark; 1040 progressmeter(-1, path); 1041 1042 /* Finally, suck down the file. */ 1043 oldinti = signal(SIGINFO, psummary); 1044 if (chunked) { 1045 error = save_chunked(fin, tls, out, buf, buflen); 1046 signal(SIGINT, oldintr); 1047 signal(SIGINFO, oldinti); 1048 if (error == -1) 1049 goto cleanup_url_get; 1050 } else { 1051 while ((len = fread(buf, 1, buflen, fin)) > 0) { 1052 bytes += len; 1053 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 1054 if ((wlen = write(out, cp, len)) == -1) { 1055 warn("Writing %s", savefile); 1056 signal(SIGINT, oldintr); 1057 signal(SIGINFO, oldinti); 1058 goto cleanup_url_get; 1059 } 1060 } 1061 if (hash && !progress) { 1062 while (bytes >= hashbytes) { 1063 (void)putc('#', ttyout); 1064 hashbytes += mark; 1065 } 1066 (void)fflush(ttyout); 1067 } 1068 } 1069 save_errno = errno; 1070 signal(SIGINT, oldintr); 1071 signal(SIGINFO, oldinti); 1072 if (hash && !progress && bytes > 0) { 1073 if (bytes < mark) 1074 (void)putc('#', ttyout); 1075 (void)putc('\n', ttyout); 1076 (void)fflush(ttyout); 1077 } 1078 if (len == 0 && ferror(fin)) { 1079 errno = save_errno; 1080 warnx("Reading from socket: %s", sockerror(tls)); 1081 goto cleanup_url_get; 1082 } 1083 } 1084 progressmeter(1, NULL); 1085 if ( 1086 #ifndef SMALL 1087 !resume && 1088 #endif /* !SMALL */ 1089 filesize != -1 && len == 0 && bytes != filesize) { 1090 if (verbose) 1091 fputs("Read short file.\n", ttyout); 1092 goto cleanup_url_get; 1093 } 1094 1095 if (verbose) 1096 ptransfer(0); 1097 1098 rval = 0; 1099 goto cleanup_url_get; 1100 1101 noftpautologin: 1102 warnx( 1103 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 1104 goto cleanup_url_get; 1105 1106 improper: 1107 warnx("Improper response from %s", host); 1108 1109 cleanup_url_get: 1110 #ifndef SMALL 1111 free(full_host); 1112 #endif /* !SMALL */ 1113 #ifndef NOSSL 1114 free(sslhost); 1115 #endif /* !NOSSL */ 1116 ftp_close(&fin, &tls, &fd); 1117 if (out >= 0 && out != fileno(stdout)) 1118 close(out); 1119 free(buf); 1120 free(pathbuf); 1121 free(proxyhost); 1122 free(proxyurl); 1123 free(newline); 1124 free(credentials); 1125 free(proxy_credentials); 1126 return (rval); 1127 } 1128 1129 static int 1130 save_chunked(FILE *fin, struct tls *tls, int out, char *buf, size_t buflen) 1131 { 1132 1133 char *header, *end, *cp; 1134 unsigned long chunksize; 1135 size_t hlen, rlen, wlen; 1136 ssize_t written; 1137 char cr, lf; 1138 1139 for (;;) { 1140 header = ftp_readline(fin, &hlen); 1141 if (header == NULL) 1142 break; 1143 /* strip CRLF and any optional chunk extension */ 1144 header[strcspn(header, ";\r\n")] = '\0'; 1145 errno = 0; 1146 chunksize = strtoul(header, &end, 16); 1147 if (errno || header[0] == '\0' || *end != '\0' || 1148 chunksize > INT_MAX) { 1149 warnx("Invalid chunk size '%s'", header); 1150 free(header); 1151 return -1; 1152 } 1153 free(header); 1154 1155 if (chunksize == 0) { 1156 /* We're done. Ignore optional trailer. */ 1157 return 0; 1158 } 1159 1160 for (written = 0; chunksize != 0; chunksize -= rlen) { 1161 rlen = (chunksize < buflen) ? chunksize : buflen; 1162 rlen = fread(buf, 1, rlen, fin); 1163 if (rlen == 0) 1164 break; 1165 bytes += rlen; 1166 for (cp = buf, wlen = rlen; wlen > 0; 1167 wlen -= written, cp += written) { 1168 if ((written = write(out, cp, wlen)) == -1) { 1169 warn("Writing output file"); 1170 return -1; 1171 } 1172 } 1173 } 1174 1175 if (rlen == 0 || 1176 fread(&cr, 1, 1, fin) != 1 || 1177 fread(&lf, 1, 1, fin) != 1) 1178 break; 1179 1180 if (cr != '\r' || lf != '\n') { 1181 warnx("Invalid chunked encoding"); 1182 return -1; 1183 } 1184 } 1185 1186 if (ferror(fin)) 1187 warnx("Error while reading from socket: %s", sockerror(tls)); 1188 else 1189 warnx("Invalid chunked encoding: short read"); 1190 1191 return -1; 1192 } 1193 1194 /* 1195 * Abort a http retrieval 1196 */ 1197 /* ARGSUSED */ 1198 static void 1199 aborthttp(int signo) 1200 { 1201 const char errmsg[] = "\nfetch aborted.\n"; 1202 1203 alarmtimer(0); 1204 write(fileno(ttyout), errmsg, sizeof(errmsg) - 1); 1205 longjmp(httpabort, 1); 1206 } 1207 1208 /* 1209 * Retrieve multiple files from the command line, transferring 1210 * files of the form "host:path", "ftp://host/path" using the 1211 * ftp protocol, and files of the form "http://host/path" using 1212 * the http protocol. 1213 * If path has a trailing "/", then return (-1); 1214 * the path will be cd-ed into and the connection remains open, 1215 * and the function will return -1 (to indicate the connection 1216 * is alive). 1217 * If an error occurs the return value will be the offset+1 in 1218 * argv[] of the file that caused a problem (i.e, argv[x] 1219 * returns x+1) 1220 * Otherwise, 0 is returned if all files retrieved successfully. 1221 */ 1222 int 1223 auto_fetch(int argc, char *argv[], char *outfile) 1224 { 1225 char *xargv[5]; 1226 char *cp, *url, *host, *dir, *file, *portnum; 1227 char *username, *pass, *pathstart; 1228 char *ftpproxy, *httpproxy; 1229 int rval, xargc, lastfile; 1230 volatile int argpos; 1231 int dirhasglob, filehasglob, oautologin; 1232 char rempath[PATH_MAX]; 1233 1234 argpos = 0; 1235 1236 if (setjmp(toplevel)) { 1237 if (connected) 1238 disconnect(0, NULL); 1239 return (argpos + 1); 1240 } 1241 (void)signal(SIGINT, (sig_t)intr); 1242 (void)signal(SIGPIPE, (sig_t)lostpeer); 1243 1244 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 1245 ftpproxy = NULL; 1246 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 1247 httpproxy = NULL; 1248 1249 /* 1250 * Loop through as long as there's files to fetch. 1251 */ 1252 username = pass = NULL; 1253 for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) { 1254 if (strchr(argv[argpos], ':') == NULL) 1255 break; 1256 1257 free(username); 1258 free(pass); 1259 host = dir = file = portnum = username = pass = NULL; 1260 1261 lastfile = (argv[argpos+1] == NULL); 1262 1263 /* 1264 * We muck with the string, so we make a copy. 1265 */ 1266 url = strdup(argv[argpos]); 1267 if (url == NULL) 1268 errx(1, "Can't allocate memory for auto-fetch."); 1269 1270 if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 1271 if (file_get(url + sizeof(FILE_URL) - 1, outfile) == -1) 1272 rval = argpos + 1; 1273 continue; 1274 } 1275 1276 /* 1277 * Try HTTP URL-style arguments next. 1278 */ 1279 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1280 strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0) { 1281 redirect_loop = 0; 1282 retried = 0; 1283 if (url_get(url, httpproxy, outfile, lastfile) == -1) 1284 rval = argpos + 1; 1285 continue; 1286 } 1287 1288 /* 1289 * Try FTP URL-style arguments next. If ftpproxy is 1290 * set, use url_get() instead of standard ftp. 1291 * Finally, try host:file. 1292 */ 1293 host = url; 1294 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1295 char *passend, *passagain, *userend; 1296 1297 if (ftpproxy) { 1298 if (url_get(url, ftpproxy, outfile, lastfile) == -1) 1299 rval = argpos + 1; 1300 continue; 1301 } 1302 host += sizeof(FTP_URL) - 1; 1303 dir = strchr(host, '/'); 1304 1305 /* Look for [user:pass@]host[:port] */ 1306 1307 /* check if we have "user:pass@" */ 1308 userend = strchr(host, ':'); 1309 passend = strchr(host, '@'); 1310 if (passend && userend && userend < passend && 1311 (!dir || passend < dir)) { 1312 username = host; 1313 pass = userend + 1; 1314 host = passend + 1; 1315 *userend = *passend = '\0'; 1316 passagain = strchr(host, '@'); 1317 if (strchr(pass, '@') != NULL || 1318 (passagain != NULL && passagain < dir)) { 1319 warnx(at_encoding_warning); 1320 username = pass = NULL; 1321 goto bad_ftp_url; 1322 } 1323 1324 if (EMPTYSTRING(username)) { 1325 bad_ftp_url: 1326 warnx("Invalid URL: %s", argv[argpos]); 1327 rval = argpos + 1; 1328 username = pass = NULL; 1329 continue; 1330 } 1331 username = urldecode(username); 1332 pass = urldecode(pass); 1333 } 1334 1335 /* check [host]:port, or [host] */ 1336 if (host[0] == '[') { 1337 cp = strchr(host, ']'); 1338 if (cp && (!dir || cp < dir)) { 1339 if (cp + 1 == dir || cp[1] == ':') { 1340 host++; 1341 *cp++ = '\0'; 1342 } else 1343 cp = NULL; 1344 } else 1345 cp = host; 1346 } else 1347 cp = host; 1348 1349 /* split off host[:port] if there is */ 1350 if (cp) { 1351 portnum = strchr(cp, ':'); 1352 pathstart = strchr(cp, '/'); 1353 /* : in path is not a port # indicator */ 1354 if (portnum && pathstart && 1355 pathstart < portnum) 1356 portnum = NULL; 1357 1358 if (!portnum) 1359 ; 1360 else { 1361 if (!dir) 1362 ; 1363 else if (portnum + 1 < dir) { 1364 *portnum++ = '\0'; 1365 /* 1366 * XXX should check if portnum 1367 * is decimal number 1368 */ 1369 } else { 1370 /* empty portnum */ 1371 goto bad_ftp_url; 1372 } 1373 } 1374 } else 1375 portnum = NULL; 1376 } else { /* classic style `host:file' */ 1377 dir = strchr(host, ':'); 1378 } 1379 if (EMPTYSTRING(host)) { 1380 rval = argpos + 1; 1381 continue; 1382 } 1383 1384 /* 1385 * If dir is NULL, the file wasn't specified 1386 * (URL looked something like ftp://host) 1387 */ 1388 if (dir != NULL) 1389 *dir++ = '\0'; 1390 1391 /* 1392 * Extract the file and (if present) directory name. 1393 */ 1394 if (!EMPTYSTRING(dir)) { 1395 cp = strrchr(dir, '/'); 1396 if (cp != NULL) { 1397 *cp++ = '\0'; 1398 file = cp; 1399 } else { 1400 file = dir; 1401 dir = NULL; 1402 } 1403 } 1404 #ifndef SMALL 1405 if (debug) 1406 fprintf(ttyout, 1407 "user %s:%s host %s port %s dir %s file %s\n", 1408 username, pass ? "XXXX" : NULL, host, portnum, 1409 dir, file); 1410 #endif /* !SMALL */ 1411 1412 /* 1413 * Set up the connection. 1414 */ 1415 if (connected) 1416 disconnect(0, NULL); 1417 xargv[0] = __progname; 1418 xargv[1] = host; 1419 xargv[2] = NULL; 1420 xargc = 2; 1421 if (!EMPTYSTRING(portnum)) { 1422 xargv[2] = portnum; 1423 xargv[3] = NULL; 1424 xargc = 3; 1425 } 1426 oautologin = autologin; 1427 if (username == NULL) 1428 anonftp = 1; 1429 else { 1430 anonftp = 0; 1431 autologin = 0; 1432 } 1433 setpeer(xargc, xargv); 1434 autologin = oautologin; 1435 if (connected == 0 || 1436 (connected == 1 && autologin && (username == NULL || 1437 !ftp_login(host, username, pass)))) { 1438 warnx("Can't connect or login to host `%s'", host); 1439 rval = argpos + 1; 1440 continue; 1441 } 1442 1443 /* Always use binary transfers. */ 1444 setbinary(0, NULL); 1445 1446 dirhasglob = filehasglob = 0; 1447 if (doglob) { 1448 if (!EMPTYSTRING(dir) && 1449 strpbrk(dir, "*?[]{}") != NULL) 1450 dirhasglob = 1; 1451 if (!EMPTYSTRING(file) && 1452 strpbrk(file, "*?[]{}") != NULL) 1453 filehasglob = 1; 1454 } 1455 1456 /* Change directories, if necessary. */ 1457 if (!EMPTYSTRING(dir) && !dirhasglob) { 1458 xargv[0] = "cd"; 1459 xargv[1] = dir; 1460 xargv[2] = NULL; 1461 cd(2, xargv); 1462 if (!dirchange) { 1463 rval = argpos + 1; 1464 continue; 1465 } 1466 } 1467 1468 if (EMPTYSTRING(file)) { 1469 #ifndef SMALL 1470 rval = -1; 1471 #else /* !SMALL */ 1472 recvrequest("NLST", "-", NULL, "w", 0, 0); 1473 rval = 0; 1474 #endif /* !SMALL */ 1475 continue; 1476 } 1477 1478 if (verbose) 1479 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 1480 1481 if (dirhasglob) { 1482 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1483 file = rempath; 1484 } 1485 1486 /* Fetch the file(s). */ 1487 xargc = 2; 1488 xargv[0] = "get"; 1489 xargv[1] = file; 1490 xargv[2] = NULL; 1491 if (dirhasglob || filehasglob) { 1492 int ointeractive; 1493 1494 ointeractive = interactive; 1495 interactive = 0; 1496 xargv[0] = "mget"; 1497 #ifndef SMALL 1498 if (resume) { 1499 xargc = 3; 1500 xargv[1] = "-c"; 1501 xargv[2] = file; 1502 xargv[3] = NULL; 1503 } 1504 #endif /* !SMALL */ 1505 mget(xargc, xargv); 1506 interactive = ointeractive; 1507 } else { 1508 if (outfile != NULL) { 1509 xargv[2] = outfile; 1510 xargv[3] = NULL; 1511 xargc++; 1512 } 1513 #ifndef SMALL 1514 if (resume) 1515 reget(xargc, xargv); 1516 else 1517 #endif /* !SMALL */ 1518 get(xargc, xargv); 1519 } 1520 1521 if ((code / 100) != COMPLETE) 1522 rval = argpos + 1; 1523 } 1524 if (connected && rval != -1) 1525 disconnect(0, NULL); 1526 return (rval); 1527 } 1528 1529 char * 1530 urldecode(const char *str) 1531 { 1532 char *ret, c; 1533 int i, reallen; 1534 1535 if (str == NULL) 1536 return NULL; 1537 if ((ret = malloc(strlen(str)+1)) == NULL) 1538 err(1, "Can't allocate memory for URL decoding"); 1539 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 1540 c = str[i]; 1541 if (c == '+') { 1542 *ret = ' '; 1543 continue; 1544 } 1545 1546 /* Cannot use strtol here because next char 1547 * after %xx may be a digit. 1548 */ 1549 if (c == '%' && isxdigit((unsigned char)str[i+1]) && 1550 isxdigit((unsigned char)str[i+2])) { 1551 *ret = hextochar(&str[i+1]); 1552 i+=2; 1553 continue; 1554 } 1555 *ret = c; 1556 } 1557 *ret = '\0'; 1558 1559 return ret-reallen; 1560 } 1561 1562 static char * 1563 recode_credentials(const char *userinfo) 1564 { 1565 char *ui, *creds; 1566 size_t ulen, credsize; 1567 1568 /* url-decode the user and pass */ 1569 ui = urldecode(userinfo); 1570 1571 ulen = strlen(ui); 1572 credsize = (ulen + 2) / 3 * 4 + 1; 1573 creds = malloc(credsize); 1574 if (creds == NULL) 1575 errx(1, "out of memory"); 1576 if (b64_ntop(ui, ulen, creds, credsize) == -1) 1577 errx(1, "error in base64 encoding"); 1578 free(ui); 1579 return (creds); 1580 } 1581 1582 static char 1583 hextochar(const char *str) 1584 { 1585 unsigned char c, ret; 1586 1587 c = str[0]; 1588 ret = c; 1589 if (isalpha(c)) 1590 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1591 else 1592 ret -= '0'; 1593 ret *= 16; 1594 1595 c = str[1]; 1596 ret += c; 1597 if (isalpha(c)) 1598 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1599 else 1600 ret -= '0'; 1601 return ret; 1602 } 1603 1604 int 1605 isurl(const char *p) 1606 { 1607 1608 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 1609 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1610 #ifndef NOSSL 1611 strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 || 1612 #endif /* !NOSSL */ 1613 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 1614 strstr(p, ":/")) 1615 return (1); 1616 return (0); 1617 } 1618 1619 static char * 1620 ftp_readline(FILE *fp, size_t *lenp) 1621 { 1622 return fparseln(fp, lenp, NULL, "\0\0\0", 0); 1623 } 1624 1625 #ifndef SMALL 1626 static int 1627 ftp_printf(FILE *fp, const char *fmt, ...) 1628 { 1629 va_list ap; 1630 int ret; 1631 1632 va_start(ap, fmt); 1633 ret = vfprintf(fp, fmt, ap); 1634 va_end(ap); 1635 1636 if (debug) { 1637 va_start(ap, fmt); 1638 vfprintf(ttyout, fmt, ap); 1639 va_end(ap); 1640 } 1641 1642 return ret; 1643 } 1644 #endif /* !SMALL */ 1645 1646 static void 1647 ftp_close(FILE **fin, struct tls **tls, int *fd) 1648 { 1649 #ifndef NOSSL 1650 int ret; 1651 1652 if (*tls != NULL) { 1653 if (tls_session_fd != -1) 1654 dprintf(STDERR_FILENO, "tls session resumed: %s\n", 1655 tls_conn_session_resumed(*tls) ? "yes" : "no"); 1656 do { 1657 ret = tls_close(*tls); 1658 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1659 tls_free(*tls); 1660 *tls = NULL; 1661 } 1662 if (*fd != -1) { 1663 close(*fd); 1664 *fd = -1; 1665 } 1666 #endif 1667 if (*fin != NULL) { 1668 fclose(*fin); 1669 *fin = NULL; 1670 } 1671 } 1672 1673 static const char * 1674 sockerror(struct tls *tls) 1675 { 1676 int save_errno = errno; 1677 #ifndef NOSSL 1678 if (tls != NULL) { 1679 const char *tlserr = tls_error(tls); 1680 if (tlserr != NULL) 1681 return tlserr; 1682 } 1683 #endif 1684 return strerror(save_errno); 1685 } 1686 1687 #ifndef NOSSL 1688 static int 1689 proxy_connect(int socket, char *host, char *cookie) 1690 { 1691 int l; 1692 char buf[1024]; 1693 char *connstr, *hosttail, *port; 1694 1695 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 1696 (hosttail[1] == '\0' || hosttail[1] == ':')) { 1697 host++; 1698 *hosttail++ = '\0'; 1699 } else 1700 hosttail = host; 1701 1702 port = strrchr(hosttail, ':'); /* find portnum */ 1703 if (port != NULL) 1704 *port++ = '\0'; 1705 if (!port) 1706 port = "443"; 1707 1708 if (cookie) { 1709 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1710 "Proxy-Authorization: Basic %s\r\n%s\r\n\r\n", 1711 host, port, cookie, HTTP_USER_AGENT); 1712 } else { 1713 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n%s\r\n\r\n", 1714 host, port, HTTP_USER_AGENT); 1715 } 1716 1717 if (l == -1) 1718 errx(1, "Could not allocate memory to assemble connect string!"); 1719 #ifndef SMALL 1720 if (debug) 1721 printf("%s", connstr); 1722 #endif /* !SMALL */ 1723 if (write(socket, connstr, l) != l) 1724 err(1, "Could not send connect string"); 1725 read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */ 1726 free(connstr); 1727 return(200); 1728 } 1729 1730 static int 1731 stdio_tls_write_wrapper(void *arg, const char *buf, int len) 1732 { 1733 struct tls *tls = arg; 1734 ssize_t ret; 1735 1736 do { 1737 ret = tls_write(tls, buf, len); 1738 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1739 1740 return ret; 1741 } 1742 1743 static int 1744 stdio_tls_read_wrapper(void *arg, char *buf, int len) 1745 { 1746 struct tls *tls = arg; 1747 ssize_t ret; 1748 1749 do { 1750 ret = tls_read(tls, buf, len); 1751 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1752 1753 return ret; 1754 } 1755 #endif /* !NOSSL */ 1756