1 /* $OpenBSD: fetch.c,v 1.202 2021/02/25 20:51:55 naddy 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 <resolv.h> 60 #include <utime.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 void ftp_close(FILE **, struct tls **, int *); 79 static const char *sockerror(struct tls *); 80 #ifdef SMALL 81 #define ftp_printf(fp, ...) fprintf(fp, __VA_ARGS__) 82 #else 83 static int ftp_printf(FILE *, const char *, ...); 84 #endif /* SMALL */ 85 #ifndef NOSSL 86 static int proxy_connect(int, char *, char *); 87 static int stdio_tls_write_wrapper(void *, const char *, int); 88 static int stdio_tls_read_wrapper(void *, char *, int); 89 #endif /* !NOSSL */ 90 91 #define FTP_URL "ftp://" /* ftp URL prefix */ 92 #define HTTP_URL "http://" /* http URL prefix */ 93 #define HTTPS_URL "https://" /* https URL prefix */ 94 #define FILE_URL "file:" /* file URL prefix */ 95 #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */ 96 #define HTTP_PROXY "http_proxy" /* env var with http proxy location */ 97 98 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 99 100 static const char at_encoding_warning[] = 101 "Extra `@' characters in usernames and passwords should be encoded as %%40"; 102 103 static jmp_buf httpabort; 104 105 static int redirect_loop; 106 static int retried; 107 108 /* 109 * Determine whether the character needs encoding, per RFC1738: 110 * - No corresponding graphic US-ASCII. 111 * - Unsafe characters. 112 */ 113 static int 114 unsafe_char(const char *c0) 115 { 116 const char *unsafe_chars = " <>\"#{}|\\^~[]`"; 117 const unsigned char *c = (const unsigned char *)c0; 118 119 /* 120 * No corresponding graphic US-ASCII. 121 * Control characters and octets not used in US-ASCII. 122 */ 123 return (iscntrl(*c) || !isascii(*c) || 124 125 /* 126 * Unsafe characters. 127 * '%' is also unsafe, if is not followed by two 128 * hexadecimal digits. 129 */ 130 strchr(unsafe_chars, *c) != NULL || 131 (*c == '%' && (!isxdigit(*++c) || !isxdigit(*++c)))); 132 } 133 134 /* 135 * Encode given URL, per RFC1738. 136 * Allocate and return string to the caller. 137 */ 138 static char * 139 url_encode(const char *path) 140 { 141 size_t i, length, new_length; 142 char *epath, *epathp; 143 144 length = new_length = strlen(path); 145 146 /* 147 * First pass: 148 * Count unsafe characters, and determine length of the 149 * final URL. 150 */ 151 for (i = 0; i < length; i++) 152 if (unsafe_char(path + i)) 153 new_length += 2; 154 155 epath = epathp = malloc(new_length + 1); /* One more for '\0'. */ 156 if (epath == NULL) 157 err(1, "Can't allocate memory for URL encoding"); 158 159 /* 160 * Second pass: 161 * Encode, and copy final URL. 162 */ 163 for (i = 0; i < length; i++) 164 if (unsafe_char(path + i)) { 165 snprintf(epathp, 4, "%%" "%02x", 166 (unsigned char)path[i]); 167 epathp += 3; 168 } else 169 *(epathp++) = path[i]; 170 171 *epathp = '\0'; 172 return (epath); 173 } 174 175 /* ARGSUSED */ 176 static void 177 tooslow(int signo) 178 { 179 dprintf(STDERR_FILENO, "%s: connect taking too long\n", __progname); 180 _exit(2); 181 } 182 183 /* 184 * Copy a local file (used by the OpenBSD installer). 185 * Returns -1 on failure, 0 on success 186 */ 187 static int 188 file_get(const char *path, const char *outfile) 189 { 190 struct stat st; 191 int fd, out = -1, rval = -1, save_errno; 192 volatile sig_t oldintr, oldinti; 193 const char *savefile; 194 char *buf = NULL, *cp, *pathbuf = NULL; 195 const size_t buflen = 128 * 1024; 196 off_t hashbytes; 197 ssize_t len, wlen; 198 199 direction = "received"; 200 201 fd = open(path, O_RDONLY); 202 if (fd == -1) { 203 warn("Can't open file %s", path); 204 return -1; 205 } 206 207 if (fstat(fd, &st) == -1) 208 filesize = -1; 209 else 210 filesize = st.st_size; 211 212 if (outfile != NULL) 213 savefile = outfile; 214 else { 215 if (path[strlen(path) - 1] == '/') /* Consider no file */ 216 savefile = NULL; /* after dir invalid. */ 217 else { 218 pathbuf = strdup(path); 219 if (pathbuf == NULL) 220 errx(1, "Can't allocate memory for filename"); 221 savefile = basename(pathbuf); 222 } 223 } 224 225 if (EMPTYSTRING(savefile)) { 226 warnx("No filename after directory (use -o): %s", path); 227 goto cleanup_copy; 228 } 229 230 /* Open the output file. */ 231 if (!pipeout) { 232 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666); 233 if (out == -1) { 234 warn("Can't open %s", savefile); 235 goto cleanup_copy; 236 } 237 } else 238 out = fileno(stdout); 239 240 if ((buf = malloc(buflen)) == NULL) 241 errx(1, "Can't allocate memory for transfer buffer"); 242 243 /* Trap signals */ 244 oldintr = NULL; 245 oldinti = NULL; 246 if (setjmp(httpabort)) { 247 if (oldintr) 248 (void)signal(SIGINT, oldintr); 249 if (oldinti) 250 (void)signal(SIGINFO, oldinti); 251 goto cleanup_copy; 252 } 253 oldintr = signal(SIGINT, aborthttp); 254 255 bytes = 0; 256 hashbytes = mark; 257 progressmeter(-1, path); 258 259 /* Finally, suck down the file. */ 260 oldinti = signal(SIGINFO, psummary); 261 while ((len = read(fd, buf, buflen)) > 0) { 262 bytes += len; 263 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 264 if ((wlen = write(out, cp, len)) == -1) { 265 warn("Writing %s", savefile); 266 signal(SIGINT, oldintr); 267 signal(SIGINFO, oldinti); 268 goto cleanup_copy; 269 } 270 } 271 if (hash && !progress) { 272 while (bytes >= hashbytes) { 273 (void)putc('#', ttyout); 274 hashbytes += mark; 275 } 276 (void)fflush(ttyout); 277 } 278 } 279 save_errno = errno; 280 signal(SIGINT, oldintr); 281 signal(SIGINFO, oldinti); 282 if (hash && !progress && bytes > 0) { 283 if (bytes < mark) 284 (void)putc('#', ttyout); 285 (void)putc('\n', ttyout); 286 (void)fflush(ttyout); 287 } 288 if (len == -1) { 289 warnc(save_errno, "Reading from file"); 290 goto cleanup_copy; 291 } 292 progressmeter(1, NULL); 293 if (verbose) 294 ptransfer(0); 295 296 rval = 0; 297 298 cleanup_copy: 299 free(buf); 300 free(pathbuf); 301 if (out >= 0 && out != fileno(stdout)) 302 close(out); 303 close(fd); 304 305 return rval; 306 } 307 308 /* 309 * Retrieve URL, via the proxy in $proxyvar if necessary. 310 * Returns -1 on failure, 0 on success 311 */ 312 static int 313 url_get(const char *origline, const char *proxyenv, const char *outfile, int lastfile) 314 { 315 char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST], *cp, *portnum, *path, ststr[4]; 316 char *hosttail, *cause = "unknown", *newline, *host, *port, *buf = NULL; 317 char *epath, *redirurl, *loctail, *h, *p, gerror[200]; 318 int error, isftpurl = 0, isredirect = 0, rval = -1; 319 int isunavail = 0, retryafter = -1; 320 struct addrinfo hints, *res0, *res; 321 const char *savefile; 322 char *pathbuf = NULL; 323 char *proxyurl = NULL; 324 char *credentials = NULL, *proxy_credentials = NULL; 325 int fd = -1, out = -1; 326 volatile sig_t oldintr, oldinti; 327 FILE *fin = NULL; 328 off_t hashbytes; 329 const char *errstr; 330 ssize_t len, wlen; 331 size_t bufsize; 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 char tmbuf[32]; 343 time_t mtime = 0; 344 struct stat stbuf; 345 struct tm lmt = { 0 }; 346 struct timespec ts[2]; 347 #endif /* !SMALL */ 348 struct tls *tls = NULL; 349 int status; 350 int save_errno; 351 const size_t buflen = 128 * 1024; 352 int chunked = 0; 353 354 direction = "received"; 355 356 newline = strdup(origline); 357 if (newline == NULL) 358 errx(1, "Can't allocate memory to parse URL"); 359 if (strncasecmp(newline, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 360 host = newline + sizeof(HTTP_URL) - 1; 361 #ifndef SMALL 362 scheme = HTTP_URL; 363 #endif /* !SMALL */ 364 } else if (strncasecmp(newline, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 365 host = newline + sizeof(FTP_URL) - 1; 366 isftpurl = 1; 367 #ifndef SMALL 368 scheme = FTP_URL; 369 #endif /* !SMALL */ 370 } else if (strncasecmp(newline, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0) { 371 #ifndef NOSSL 372 host = newline + sizeof(HTTPS_URL) - 1; 373 ishttpsurl = 1; 374 #else 375 errx(1, "%s: No HTTPS support", newline); 376 #endif /* !NOSSL */ 377 #ifndef SMALL 378 scheme = HTTPS_URL; 379 #endif /* !SMALL */ 380 } else 381 errx(1, "%s: URL not permitted", newline); 382 383 path = strchr(host, '/'); /* Find path */ 384 385 /* 386 * Look for auth header in host. 387 * Basic auth from RFC 2617, valid characters for path are in 388 * RFC 3986 section 3.3. 389 */ 390 if (!isftpurl) { 391 p = strchr(host, '@'); 392 if (p != NULL && (path == NULL || p < path)) { 393 *p++ = '\0'; 394 credentials = recode_credentials(host); 395 396 /* Overwrite userinfo */ 397 memmove(host, p, strlen(p) + 1); 398 path = strchr(host, '/'); 399 } 400 } 401 402 if (EMPTYSTRING(path)) { 403 if (outfile) { /* No slash, but */ 404 path = strchr(host,'\0'); /* we have outfile. */ 405 goto noslash; 406 } 407 if (isftpurl) 408 goto noftpautologin; 409 warnx("No `/' after host (use -o): %s", origline); 410 goto cleanup_url_get; 411 } 412 *path++ = '\0'; 413 if (EMPTYSTRING(path) && !outfile) { 414 if (isftpurl) 415 goto noftpautologin; 416 warnx("No filename after host (use -o): %s", origline); 417 goto cleanup_url_get; 418 } 419 420 noslash: 421 if (outfile) 422 savefile = outfile; 423 else { 424 if (path[strlen(path) - 1] == '/') /* Consider no file */ 425 savefile = NULL; /* after dir invalid. */ 426 else { 427 pathbuf = strdup(path); 428 if (pathbuf == NULL) 429 errx(1, "Can't allocate memory for filename"); 430 savefile = basename(pathbuf); 431 } 432 } 433 434 if (EMPTYSTRING(savefile)) { 435 if (isftpurl) 436 goto noftpautologin; 437 warnx("No filename after directory (use -o): %s", origline); 438 goto cleanup_url_get; 439 } 440 441 #ifndef SMALL 442 if (resume && pipeout) { 443 warnx("can't append to stdout"); 444 goto cleanup_url_get; 445 } 446 #endif /* !SMALL */ 447 448 if (proxyenv != NULL) { /* use proxy */ 449 #ifndef NOSSL 450 if (ishttpsurl) { 451 sslpath = strdup(path); 452 sslhost = strdup(host); 453 if (! sslpath || ! sslhost) 454 errx(1, "Can't allocate memory for https path/host."); 455 } 456 #endif /* !NOSSL */ 457 proxyhost = strdup(host); 458 if (proxyhost == NULL) 459 errx(1, "Can't allocate memory for proxy host."); 460 proxyurl = strdup(proxyenv); 461 if (proxyurl == NULL) 462 errx(1, "Can't allocate memory for proxy URL."); 463 if (strncasecmp(proxyurl, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 464 host = proxyurl + sizeof(HTTP_URL) - 1; 465 else if (strncasecmp(proxyurl, FTP_URL, sizeof(FTP_URL) - 1) == 0) 466 host = proxyurl + sizeof(FTP_URL) - 1; 467 else { 468 warnx("Malformed proxy URL: %s", proxyenv); 469 goto cleanup_url_get; 470 } 471 if (EMPTYSTRING(host)) { 472 warnx("Malformed proxy URL: %s", proxyenv); 473 goto cleanup_url_get; 474 } 475 if (*--path == '\0') 476 *path = '/'; /* add / back to real path */ 477 path = strchr(host, '/'); /* remove trailing / on host */ 478 if (!EMPTYSTRING(path)) 479 *path++ = '\0'; /* i guess this ++ is useless */ 480 481 path = strchr(host, '@'); /* look for credentials in proxy */ 482 if (!EMPTYSTRING(path)) { 483 *path = '\0'; 484 if (strchr(host, ':') == NULL) { 485 warnx("Malformed proxy URL: %s", proxyenv); 486 goto cleanup_url_get; 487 } 488 proxy_credentials = recode_credentials(host); 489 *path = '@'; /* restore @ in proxyurl */ 490 491 /* 492 * This removes the password from proxyurl, 493 * filling with stars 494 */ 495 for (host = 1 + strchr(proxyurl + 5, ':'); *host != '@'; 496 host++) 497 *host = '*'; 498 499 host = path + 1; 500 } 501 502 path = newline; 503 } 504 505 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 506 (hosttail[1] == '\0' || hosttail[1] == ':')) { 507 host++; 508 *hosttail++ = '\0'; 509 #ifndef SMALL 510 if (asprintf(&full_host, "[%s]", host) == -1) 511 errx(1, "Cannot allocate memory for hostname"); 512 #endif /* !SMALL */ 513 } else 514 hosttail = host; 515 516 portnum = strrchr(hosttail, ':'); /* find portnum */ 517 if (portnum != NULL) 518 *portnum++ = '\0'; 519 #ifndef NOSSL 520 port = portnum ? portnum : (ishttpsurl ? httpsport : httpport); 521 #else /* !NOSSL */ 522 port = portnum ? portnum : httpport; 523 #endif /* !NOSSL */ 524 525 #ifndef SMALL 526 if (full_host == NULL) 527 if ((full_host = strdup(host)) == NULL) 528 errx(1, "Cannot allocate memory for hostname"); 529 if (debug) 530 fprintf(ttyout, "host %s, port %s, path %s, " 531 "save as %s, auth %s.\n", host, port, path, 532 savefile, credentials ? credentials : "none"); 533 #endif /* !SMALL */ 534 535 memset(&hints, 0, sizeof(hints)); 536 hints.ai_family = family; 537 hints.ai_socktype = SOCK_STREAM; 538 error = getaddrinfo(host, port, &hints, &res0); 539 /* 540 * If the services file is corrupt/missing, fall back 541 * on our hard-coded defines. 542 */ 543 if (error == EAI_SERVICE && port == httpport) { 544 snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT); 545 error = getaddrinfo(host, pbuf, &hints, &res0); 546 #ifndef NOSSL 547 } else if (error == EAI_SERVICE && port == httpsport) { 548 snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT); 549 error = getaddrinfo(host, pbuf, &hints, &res0); 550 #endif /* !NOSSL */ 551 } 552 if (error) { 553 warnx("%s: %s", host, gai_strerror(error)); 554 goto cleanup_url_get; 555 } 556 557 #ifndef SMALL 558 if (srcaddr) { 559 hints.ai_flags |= AI_NUMERICHOST; 560 error = getaddrinfo(srcaddr, NULL, &hints, &ares); 561 if (error) { 562 warnx("%s: %s", srcaddr, gai_strerror(error)); 563 goto cleanup_url_get; 564 } 565 } 566 #endif /* !SMALL */ 567 568 /* ensure consistent order of the output */ 569 if (verbose) 570 setvbuf(ttyout, NULL, _IOLBF, 0); 571 572 fd = -1; 573 for (res = res0; res; res = res->ai_next) { 574 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 575 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 576 strlcpy(hbuf, "(unknown)", sizeof(hbuf)); 577 if (verbose) 578 fprintf(ttyout, "Trying %s...\n", hbuf); 579 580 fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 581 if (fd == -1) { 582 cause = "socket"; 583 continue; 584 } 585 586 #ifndef SMALL 587 if (srcaddr) { 588 if (ares->ai_family != res->ai_family) { 589 close(fd); 590 fd = -1; 591 errno = EINVAL; 592 cause = "bind"; 593 continue; 594 } 595 if (bind(fd, ares->ai_addr, ares->ai_addrlen) == -1) { 596 save_errno = errno; 597 close(fd); 598 errno = save_errno; 599 fd = -1; 600 cause = "bind"; 601 continue; 602 } 603 } 604 #endif /* !SMALL */ 605 606 if (connect_timeout) { 607 (void)signal(SIGALRM, tooslow); 608 alarmtimer(connect_timeout); 609 } 610 611 for (error = connect(fd, res->ai_addr, res->ai_addrlen); 612 error != 0 && errno == EINTR; error = connect_wait(fd)) 613 continue; 614 if (error != 0) { 615 save_errno = errno; 616 close(fd); 617 errno = save_errno; 618 fd = -1; 619 cause = "connect"; 620 continue; 621 } 622 623 /* get port in numeric */ 624 if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0, 625 pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0) 626 port = pbuf; 627 else 628 port = NULL; 629 630 #ifndef NOSSL 631 if (proxyenv && sslhost) 632 proxy_connect(fd, sslhost, proxy_credentials); 633 #endif /* !NOSSL */ 634 break; 635 } 636 freeaddrinfo(res0); 637 #ifndef SMALL 638 if (srcaddr) 639 freeaddrinfo(ares); 640 #endif /* !SMALL */ 641 if (fd < 0) { 642 warn("%s", cause); 643 goto cleanup_url_get; 644 } 645 646 #ifndef NOSSL 647 if (ishttpsurl) { 648 ssize_t ret; 649 if (proxyenv && sslpath) { 650 ishttpsurl = 0; 651 proxyurl = NULL; 652 path = sslpath; 653 } 654 if (sslhost == NULL) { 655 sslhost = strdup(host); 656 if (sslhost == NULL) 657 errx(1, "Can't allocate memory for https host."); 658 } 659 if ((tls = tls_client()) == NULL) { 660 fprintf(ttyout, "failed to create SSL client\n"); 661 goto cleanup_url_get; 662 } 663 if (tls_configure(tls, tls_config) != 0) { 664 fprintf(ttyout, "TLS configuration failure: %s\n", 665 tls_error(tls)); 666 goto cleanup_url_get; 667 } 668 if (tls_connect_socket(tls, fd, sslhost) != 0) { 669 fprintf(ttyout, "TLS connect failure: %s\n", tls_error(tls)); 670 goto cleanup_url_get; 671 } 672 do { 673 ret = tls_handshake(tls); 674 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 675 if (ret != 0) { 676 fprintf(ttyout, "TLS handshake failure: %s\n", tls_error(tls)); 677 goto cleanup_url_get; 678 } 679 fin = funopen(tls, stdio_tls_read_wrapper, 680 stdio_tls_write_wrapper, NULL, NULL); 681 } else { 682 fin = fdopen(fd, "r+"); 683 fd = -1; 684 } 685 #else /* !NOSSL */ 686 fin = fdopen(fd, "r+"); 687 fd = -1; 688 #endif /* !NOSSL */ 689 690 #ifdef SMALL 691 if (lastfile) { 692 if (pipeout) { 693 if (pledge("stdio rpath inet dns tty", NULL) == -1) 694 err(1, "pledge"); 695 } else { 696 if (pledge("stdio rpath wpath cpath inet dns tty", NULL) == -1) 697 err(1, "pledge"); 698 } 699 } 700 #endif 701 702 if (connect_timeout) { 703 signal(SIGALRM, SIG_DFL); 704 alarmtimer(0); 705 } 706 707 /* 708 * Construct and send the request. Proxy requests don't want leading /. 709 */ 710 #ifndef NOSSL 711 cookie_get(host, path, ishttpsurl, &buf); 712 #endif /* !NOSSL */ 713 714 epath = url_encode(path); 715 if (proxyurl) { 716 if (verbose) { 717 fprintf(ttyout, "Requesting %s (via %s)\n", 718 origline, proxyurl); 719 } 720 /* 721 * Host: directive must use the destination host address for 722 * the original URI (path). 723 */ 724 ftp_printf(fin, "GET %s HTTP/1.1\r\n" 725 "Connection: close\r\n" 726 "Host: %s\r\n%s%s\r\n", 727 epath, proxyhost, buf ? buf : "", httpuseragent); 728 if (credentials) 729 ftp_printf(fin, "Authorization: Basic %s\r\n", 730 credentials); 731 if (proxy_credentials) 732 ftp_printf(fin, "Proxy-Authorization: Basic %s\r\n", 733 proxy_credentials); 734 ftp_printf(fin, "\r\n"); 735 } else { 736 if (verbose) 737 fprintf(ttyout, "Requesting %s\n", origline); 738 #ifndef SMALL 739 if (resume || timestamp) { 740 if (stat(savefile, &stbuf) == 0) { 741 if (resume) 742 restart_point = stbuf.st_size; 743 if (timestamp) 744 mtime = stbuf.st_mtime; 745 } else { 746 restart_point = 0; 747 mtime = 0; 748 } 749 } 750 #endif /* SMALL */ 751 ftp_printf(fin, 752 "GET /%s HTTP/1.1\r\n" 753 "Connection: close\r\n" 754 "Host: ", epath); 755 if (proxyhost) { 756 ftp_printf(fin, "%s", proxyhost); 757 port = NULL; 758 } else if (strchr(host, ':')) { 759 /* 760 * strip off scoped address portion, since it's 761 * local to node 762 */ 763 h = strdup(host); 764 if (h == NULL) 765 errx(1, "Can't allocate memory."); 766 if ((p = strchr(h, '%')) != NULL) 767 *p = '\0'; 768 ftp_printf(fin, "[%s]", h); 769 free(h); 770 } else 771 ftp_printf(fin, "%s", host); 772 773 /* 774 * Send port number only if it's specified and does not equal 775 * 80. Some broken HTTP servers get confused if you explicitly 776 * send them the port number. 777 */ 778 #ifndef NOSSL 779 if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0) 780 ftp_printf(fin, ":%s", port); 781 if (restart_point) 782 ftp_printf(fin, "\r\nRange: bytes=%lld-", 783 (long long)restart_point); 784 #else /* !NOSSL */ 785 if (port && strcmp(port, "80") != 0) 786 ftp_printf(fin, ":%s", port); 787 #endif /* !NOSSL */ 788 789 #ifndef SMALL 790 if (mtime && (http_time(mtime, tmbuf, sizeof(tmbuf)) != 0)) 791 ftp_printf(fin, "\r\nIf-Modified-Since: %s", tmbuf); 792 #endif /* SMALL */ 793 794 ftp_printf(fin, "\r\n%s%s\r\n", 795 buf ? buf : "", httpuseragent); 796 if (credentials) 797 ftp_printf(fin, "Authorization: Basic %s\r\n", 798 credentials); 799 ftp_printf(fin, "\r\n"); 800 } 801 free(epath); 802 803 #ifndef NOSSL 804 free(buf); 805 #endif /* !NOSSL */ 806 buf = NULL; 807 bufsize = 0; 808 809 if (fflush(fin) == EOF) { 810 warnx("Writing HTTP request: %s", sockerror(tls)); 811 goto cleanup_url_get; 812 } 813 if ((len = getline(&buf, &bufsize, fin)) == -1) { 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 filesize = -1; 889 890 for (;;) { 891 if ((len = getline(&buf, &bufsize, fin)) == -1) { 892 warnx("Receiving HTTP reply: %s", sockerror(tls)); 893 goto cleanup_url_get; 894 } 895 896 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 897 buf[--len] = '\0'; 898 if (len == 0) 899 break; 900 #ifndef SMALL 901 if (debug) 902 fprintf(ttyout, "received '%s'\n", buf); 903 #endif /* !SMALL */ 904 905 /* Look for some headers */ 906 cp = buf; 907 #define CONTENTLEN "Content-Length: " 908 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 909 size_t s; 910 cp += sizeof(CONTENTLEN) - 1; 911 if ((s = strcspn(cp, " \t"))) 912 *(cp+s) = 0; 913 filesize = strtonum(cp, 0, LLONG_MAX, &errstr); 914 if (errstr != NULL) 915 goto improper; 916 #ifndef SMALL 917 if (restart_point) 918 filesize += restart_point; 919 #endif /* !SMALL */ 920 #define LOCATION "Location: " 921 } else if (isredirect && 922 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 923 cp += sizeof(LOCATION) - 1; 924 /* 925 * If there is a colon before the first slash, this URI 926 * is not relative. RFC 3986 4.2 927 */ 928 if (cp[strcspn(cp, ":/")] != ':') { 929 #ifdef SMALL 930 errx(1, "Relative redirect not supported"); 931 #else /* SMALL */ 932 /* XXX doesn't handle protocol-relative URIs */ 933 if (*cp == '/') { 934 locbase = NULL; 935 cp++; 936 } else { 937 locbase = strdup(path); 938 if (locbase == NULL) 939 errx(1, "Can't allocate memory" 940 " for location base"); 941 loctail = strchr(locbase, '#'); 942 if (loctail != NULL) 943 *loctail = '\0'; 944 loctail = strchr(locbase, '?'); 945 if (loctail != NULL) 946 *loctail = '\0'; 947 loctail = strrchr(locbase, '/'); 948 if (loctail == NULL) { 949 free(locbase); 950 locbase = NULL; 951 } else 952 loctail[1] = '\0'; 953 } 954 /* Contruct URL from relative redirect */ 955 if (asprintf(&redirurl, "%s%s%s%s/%s%s", 956 scheme, full_host, 957 portnum ? ":" : "", 958 portnum ? portnum : "", 959 locbase ? locbase : "", 960 cp) == -1) 961 errx(1, "Cannot build " 962 "redirect URL"); 963 free(locbase); 964 #endif /* SMALL */ 965 } else if ((redirurl = strdup(cp)) == NULL) 966 errx(1, "Cannot allocate memory for URL"); 967 loctail = strchr(redirurl, '#'); 968 if (loctail != NULL) 969 *loctail = '\0'; 970 if (verbose) 971 fprintf(ttyout, "Redirected to %s\n", redirurl); 972 ftp_close(&fin, &tls, &fd); 973 rval = url_get(redirurl, proxyenv, savefile, lastfile); 974 free(redirurl); 975 goto cleanup_url_get; 976 #define RETRYAFTER "Retry-After: " 977 } else if (isunavail && 978 strncasecmp(cp, RETRYAFTER, sizeof(RETRYAFTER) - 1) == 0) { 979 size_t s; 980 cp += sizeof(RETRYAFTER) - 1; 981 if ((s = strcspn(cp, " \t"))) 982 cp[s] = '\0'; 983 retryafter = strtonum(cp, 0, 0, &errstr); 984 if (errstr != NULL) 985 retryafter = -1; 986 #define TRANSFER_ENCODING "Transfer-Encoding: " 987 } else if (strncasecmp(cp, TRANSFER_ENCODING, 988 sizeof(TRANSFER_ENCODING) - 1) == 0) { 989 cp += sizeof(TRANSFER_ENCODING) - 1; 990 cp[strcspn(cp, " \t")] = '\0'; 991 if (strcasecmp(cp, "chunked") == 0) 992 chunked = 1; 993 #ifndef SMALL 994 #define LAST_MODIFIED "Last-Modified: " 995 } else if (strncasecmp(cp, LAST_MODIFIED, 996 sizeof(LAST_MODIFIED) - 1) == 0) { 997 cp += sizeof(LAST_MODIFIED) - 1; 998 cp[strcspn(cp, "\t")] = '\0'; 999 if (strptime(cp, "%a, %d %h %Y %T %Z", &lmt) == NULL) 1000 server_timestamps = 0; 1001 #endif /* !SMALL */ 1002 } 1003 } 1004 free(buf); 1005 buf = NULL; 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 if ((buf = malloc(buflen)) == NULL) 1050 errx(1, "Can't allocate memory for transfer buffer"); 1051 1052 /* Trap signals */ 1053 oldintr = NULL; 1054 oldinti = NULL; 1055 if (setjmp(httpabort)) { 1056 if (oldintr) 1057 (void)signal(SIGINT, oldintr); 1058 if (oldinti) 1059 (void)signal(SIGINFO, oldinti); 1060 goto cleanup_url_get; 1061 } 1062 oldintr = signal(SIGINT, aborthttp); 1063 1064 bytes = 0; 1065 hashbytes = mark; 1066 progressmeter(-1, path); 1067 1068 /* Finally, suck down the file. */ 1069 oldinti = signal(SIGINFO, psummary); 1070 if (chunked) { 1071 error = save_chunked(fin, tls, out, buf, buflen); 1072 signal(SIGINT, oldintr); 1073 signal(SIGINFO, oldinti); 1074 if (error == -1) 1075 goto cleanup_url_get; 1076 } else { 1077 while ((len = fread(buf, 1, buflen, fin)) > 0) { 1078 bytes += len; 1079 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 1080 if ((wlen = write(out, cp, len)) == -1) { 1081 warn("Writing %s", savefile); 1082 signal(SIGINT, oldintr); 1083 signal(SIGINFO, oldinti); 1084 goto cleanup_url_get; 1085 } 1086 } 1087 if (hash && !progress) { 1088 while (bytes >= hashbytes) { 1089 (void)putc('#', ttyout); 1090 hashbytes += mark; 1091 } 1092 (void)fflush(ttyout); 1093 } 1094 } 1095 save_errno = errno; 1096 signal(SIGINT, oldintr); 1097 signal(SIGINFO, oldinti); 1098 if (hash && !progress && bytes > 0) { 1099 if (bytes < mark) 1100 (void)putc('#', ttyout); 1101 (void)putc('\n', ttyout); 1102 (void)fflush(ttyout); 1103 } 1104 if (len == 0 && ferror(fin)) { 1105 errno = save_errno; 1106 warnx("Reading from socket: %s", sockerror(tls)); 1107 goto cleanup_url_get; 1108 } 1109 } 1110 progressmeter(1, NULL); 1111 if ( 1112 #ifndef SMALL 1113 !resume && 1114 #endif /* !SMALL */ 1115 filesize != -1 && len == 0 && bytes != filesize) { 1116 if (verbose) 1117 fputs("Read short file.\n", ttyout); 1118 goto cleanup_url_get; 1119 } 1120 1121 if (verbose) 1122 ptransfer(0); 1123 1124 rval = 0; 1125 goto cleanup_url_get; 1126 1127 noftpautologin: 1128 warnx( 1129 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 1130 goto cleanup_url_get; 1131 1132 improper: 1133 warnx("Improper response from %s", host); 1134 1135 cleanup_url_get: 1136 #ifndef SMALL 1137 free(full_host); 1138 #endif /* !SMALL */ 1139 #ifndef NOSSL 1140 free(sslhost); 1141 #endif /* !NOSSL */ 1142 ftp_close(&fin, &tls, &fd); 1143 if (out >= 0 && out != fileno(stdout)) { 1144 #ifndef SMALL 1145 if (server_timestamps && lmt.tm_zone != 0) { 1146 ts[0].tv_nsec = UTIME_NOW; 1147 ts[1].tv_nsec = 0; 1148 setenv("TZ", lmt.tm_zone, 1); 1149 if (((ts[1].tv_sec = mktime(&lmt)) != -1) && 1150 (futimens(out, ts) == -1)) 1151 warnx("Unable to set file modification time"); 1152 } 1153 #endif /* !SMALL */ 1154 close(out); 1155 } 1156 free(buf); 1157 free(pathbuf); 1158 free(proxyhost); 1159 free(proxyurl); 1160 free(newline); 1161 free(credentials); 1162 free(proxy_credentials); 1163 return (rval); 1164 } 1165 1166 static int 1167 save_chunked(FILE *fin, struct tls *tls, int out, char *buf, size_t buflen) 1168 { 1169 1170 char *header = NULL, *end, *cp; 1171 unsigned long chunksize; 1172 size_t hsize = 0, rlen, wlen; 1173 ssize_t written; 1174 char cr, lf; 1175 1176 for (;;) { 1177 if (getline(&header, &hsize, fin) == -1) 1178 break; 1179 /* strip CRLF and any optional chunk extension */ 1180 header[strcspn(header, ";\r\n")] = '\0'; 1181 errno = 0; 1182 chunksize = strtoul(header, &end, 16); 1183 if (errno || header[0] == '\0' || *end != '\0' || 1184 chunksize > INT_MAX) { 1185 warnx("Invalid chunk size '%s'", header); 1186 free(header); 1187 return -1; 1188 } 1189 1190 if (chunksize == 0) { 1191 /* We're done. Ignore optional trailer. */ 1192 free(header); 1193 return 0; 1194 } 1195 1196 for (written = 0; chunksize != 0; chunksize -= rlen) { 1197 rlen = (chunksize < buflen) ? chunksize : buflen; 1198 rlen = fread(buf, 1, rlen, fin); 1199 if (rlen == 0) 1200 break; 1201 bytes += rlen; 1202 for (cp = buf, wlen = rlen; wlen > 0; 1203 wlen -= written, cp += written) { 1204 if ((written = write(out, cp, wlen)) == -1) { 1205 warn("Writing output file"); 1206 free(header); 1207 return -1; 1208 } 1209 } 1210 } 1211 1212 if (rlen == 0 || 1213 fread(&cr, 1, 1, fin) != 1 || 1214 fread(&lf, 1, 1, fin) != 1) 1215 break; 1216 1217 if (cr != '\r' || lf != '\n') { 1218 warnx("Invalid chunked encoding"); 1219 free(header); 1220 return -1; 1221 } 1222 } 1223 free(header); 1224 1225 if (ferror(fin)) 1226 warnx("Error while reading from socket: %s", sockerror(tls)); 1227 else 1228 warnx("Invalid chunked encoding: short read"); 1229 1230 return -1; 1231 } 1232 1233 /* 1234 * Abort a http retrieval 1235 */ 1236 /* ARGSUSED */ 1237 static void 1238 aborthttp(int signo) 1239 { 1240 const char errmsg[] = "\nfetch aborted.\n"; 1241 1242 alarmtimer(0); 1243 write(fileno(ttyout), errmsg, sizeof(errmsg) - 1); 1244 longjmp(httpabort, 1); 1245 } 1246 1247 /* 1248 * Retrieve multiple files from the command line, transferring 1249 * files of the form "host:path", "ftp://host/path" using the 1250 * ftp protocol, and files of the form "http://host/path" using 1251 * the http protocol. 1252 * If path has a trailing "/", then return (-1); 1253 * the path will be cd-ed into and the connection remains open, 1254 * and the function will return -1 (to indicate the connection 1255 * is alive). 1256 * If an error occurs the return value will be the offset+1 in 1257 * argv[] of the file that caused a problem (i.e, argv[x] 1258 * returns x+1) 1259 * Otherwise, 0 is returned if all files retrieved successfully. 1260 */ 1261 int 1262 auto_fetch(int argc, char *argv[], char *outfile) 1263 { 1264 char *xargv[5]; 1265 char *cp, *url, *host, *dir, *file, *portnum; 1266 char *username, *pass, *pathstart; 1267 char *ftpproxy, *httpproxy; 1268 int rval, xargc, lastfile; 1269 volatile int argpos; 1270 int dirhasglob, filehasglob, oautologin; 1271 char rempath[PATH_MAX]; 1272 1273 argpos = 0; 1274 1275 if (setjmp(toplevel)) { 1276 if (connected) 1277 disconnect(0, NULL); 1278 return (argpos + 1); 1279 } 1280 (void)signal(SIGINT, (sig_t)intr); 1281 (void)signal(SIGPIPE, (sig_t)lostpeer); 1282 1283 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 1284 ftpproxy = NULL; 1285 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 1286 httpproxy = NULL; 1287 1288 /* 1289 * Loop through as long as there's files to fetch. 1290 */ 1291 username = pass = NULL; 1292 for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) { 1293 if (strchr(argv[argpos], ':') == NULL) 1294 break; 1295 1296 free(username); 1297 free(pass); 1298 host = dir = file = portnum = username = pass = NULL; 1299 1300 lastfile = (argv[argpos+1] == NULL); 1301 1302 /* 1303 * We muck with the string, so we make a copy. 1304 */ 1305 url = strdup(argv[argpos]); 1306 if (url == NULL) 1307 errx(1, "Can't allocate memory for auto-fetch."); 1308 1309 if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 1310 if (file_get(url + sizeof(FILE_URL) - 1, outfile) == -1) 1311 rval = argpos + 1; 1312 continue; 1313 } 1314 1315 /* 1316 * Try HTTP URL-style arguments next. 1317 */ 1318 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1319 strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0) { 1320 redirect_loop = 0; 1321 retried = 0; 1322 if (url_get(url, httpproxy, outfile, lastfile) == -1) 1323 rval = argpos + 1; 1324 continue; 1325 } 1326 1327 /* 1328 * Try FTP URL-style arguments next. If ftpproxy is 1329 * set, use url_get() instead of standard ftp. 1330 * Finally, try host:file. 1331 */ 1332 host = url; 1333 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1334 char *passend, *passagain, *userend; 1335 1336 if (ftpproxy) { 1337 if (url_get(url, ftpproxy, outfile, lastfile) == -1) 1338 rval = argpos + 1; 1339 continue; 1340 } 1341 host += sizeof(FTP_URL) - 1; 1342 dir = strchr(host, '/'); 1343 1344 /* Look for [user:pass@]host[:port] */ 1345 1346 /* check if we have "user:pass@" */ 1347 userend = strchr(host, ':'); 1348 passend = strchr(host, '@'); 1349 if (passend && userend && userend < passend && 1350 (!dir || passend < dir)) { 1351 username = host; 1352 pass = userend + 1; 1353 host = passend + 1; 1354 *userend = *passend = '\0'; 1355 passagain = strchr(host, '@'); 1356 if (strchr(pass, '@') != NULL || 1357 (passagain != NULL && passagain < dir)) { 1358 warnx(at_encoding_warning); 1359 username = pass = NULL; 1360 goto bad_ftp_url; 1361 } 1362 1363 if (EMPTYSTRING(username)) { 1364 bad_ftp_url: 1365 warnx("Invalid URL: %s", argv[argpos]); 1366 rval = argpos + 1; 1367 username = pass = NULL; 1368 continue; 1369 } 1370 username = urldecode(username); 1371 pass = urldecode(pass); 1372 } 1373 1374 /* check [host]:port, or [host] */ 1375 if (host[0] == '[') { 1376 cp = strchr(host, ']'); 1377 if (cp && (!dir || cp < dir)) { 1378 if (cp + 1 == dir || cp[1] == ':') { 1379 host++; 1380 *cp++ = '\0'; 1381 } else 1382 cp = NULL; 1383 } else 1384 cp = host; 1385 } else 1386 cp = host; 1387 1388 /* split off host[:port] if there is */ 1389 if (cp) { 1390 portnum = strchr(cp, ':'); 1391 pathstart = strchr(cp, '/'); 1392 /* : in path is not a port # indicator */ 1393 if (portnum && pathstart && 1394 pathstart < portnum) 1395 portnum = NULL; 1396 1397 if (!portnum) 1398 ; 1399 else { 1400 if (!dir) 1401 ; 1402 else if (portnum + 1 < dir) { 1403 *portnum++ = '\0'; 1404 /* 1405 * XXX should check if portnum 1406 * is decimal number 1407 */ 1408 } else { 1409 /* empty portnum */ 1410 goto bad_ftp_url; 1411 } 1412 } 1413 } else 1414 portnum = NULL; 1415 } else { /* classic style `host:file' */ 1416 dir = strchr(host, ':'); 1417 } 1418 if (EMPTYSTRING(host)) { 1419 rval = argpos + 1; 1420 continue; 1421 } 1422 1423 /* 1424 * If dir is NULL, the file wasn't specified 1425 * (URL looked something like ftp://host) 1426 */ 1427 if (dir != NULL) 1428 *dir++ = '\0'; 1429 1430 /* 1431 * Extract the file and (if present) directory name. 1432 */ 1433 if (!EMPTYSTRING(dir)) { 1434 cp = strrchr(dir, '/'); 1435 if (cp != NULL) { 1436 *cp++ = '\0'; 1437 file = cp; 1438 } else { 1439 file = dir; 1440 dir = NULL; 1441 } 1442 } 1443 #ifndef SMALL 1444 if (debug) 1445 fprintf(ttyout, 1446 "user %s:%s host %s port %s dir %s file %s\n", 1447 username, pass ? "XXXX" : NULL, host, portnum, 1448 dir, file); 1449 #endif /* !SMALL */ 1450 1451 /* 1452 * Set up the connection. 1453 */ 1454 if (connected) 1455 disconnect(0, NULL); 1456 xargv[0] = __progname; 1457 xargv[1] = host; 1458 xargv[2] = NULL; 1459 xargc = 2; 1460 if (!EMPTYSTRING(portnum)) { 1461 xargv[2] = portnum; 1462 xargv[3] = NULL; 1463 xargc = 3; 1464 } 1465 oautologin = autologin; 1466 if (username == NULL) 1467 anonftp = 1; 1468 else { 1469 anonftp = 0; 1470 autologin = 0; 1471 } 1472 setpeer(xargc, xargv); 1473 autologin = oautologin; 1474 if (connected == 0 || 1475 (connected == 1 && autologin && (username == NULL || 1476 !ftp_login(host, username, pass)))) { 1477 warnx("Can't connect or login to host `%s'", host); 1478 rval = argpos + 1; 1479 continue; 1480 } 1481 1482 /* Always use binary transfers. */ 1483 setbinary(0, NULL); 1484 1485 dirhasglob = filehasglob = 0; 1486 if (doglob) { 1487 if (!EMPTYSTRING(dir) && 1488 strpbrk(dir, "*?[]{}") != NULL) 1489 dirhasglob = 1; 1490 if (!EMPTYSTRING(file) && 1491 strpbrk(file, "*?[]{}") != NULL) 1492 filehasglob = 1; 1493 } 1494 1495 /* Change directories, if necessary. */ 1496 if (!EMPTYSTRING(dir) && !dirhasglob) { 1497 xargv[0] = "cd"; 1498 xargv[1] = dir; 1499 xargv[2] = NULL; 1500 cd(2, xargv); 1501 if (!dirchange) { 1502 rval = argpos + 1; 1503 continue; 1504 } 1505 } 1506 1507 if (EMPTYSTRING(file)) { 1508 #ifndef SMALL 1509 rval = -1; 1510 #else /* !SMALL */ 1511 recvrequest("NLST", "-", NULL, "w", 0, 0); 1512 rval = 0; 1513 #endif /* !SMALL */ 1514 continue; 1515 } 1516 1517 if (verbose) 1518 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 1519 1520 if (dirhasglob) { 1521 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1522 file = rempath; 1523 } 1524 1525 /* Fetch the file(s). */ 1526 xargc = 2; 1527 xargv[0] = "get"; 1528 xargv[1] = file; 1529 xargv[2] = NULL; 1530 if (dirhasglob || filehasglob) { 1531 int ointeractive; 1532 1533 ointeractive = interactive; 1534 interactive = 0; 1535 xargv[0] = "mget"; 1536 #ifndef SMALL 1537 if (resume) { 1538 xargc = 3; 1539 xargv[1] = "-c"; 1540 xargv[2] = file; 1541 xargv[3] = NULL; 1542 } 1543 #endif /* !SMALL */ 1544 mget(xargc, xargv); 1545 interactive = ointeractive; 1546 } else { 1547 if (outfile != NULL) { 1548 xargv[2] = outfile; 1549 xargv[3] = NULL; 1550 xargc++; 1551 } 1552 #ifndef SMALL 1553 if (resume) 1554 reget(xargc, xargv); 1555 else 1556 #endif /* !SMALL */ 1557 get(xargc, xargv); 1558 } 1559 1560 if ((code / 100) != COMPLETE) 1561 rval = argpos + 1; 1562 } 1563 if (connected && rval != -1) 1564 disconnect(0, NULL); 1565 return (rval); 1566 } 1567 1568 char * 1569 urldecode(const char *str) 1570 { 1571 char *ret, c; 1572 int i, reallen; 1573 1574 if (str == NULL) 1575 return NULL; 1576 if ((ret = malloc(strlen(str)+1)) == NULL) 1577 err(1, "Can't allocate memory for URL decoding"); 1578 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 1579 c = str[i]; 1580 if (c == '+') { 1581 *ret = ' '; 1582 continue; 1583 } 1584 1585 /* Cannot use strtol here because next char 1586 * after %xx may be a digit. 1587 */ 1588 if (c == '%' && isxdigit((unsigned char)str[i+1]) && 1589 isxdigit((unsigned char)str[i+2])) { 1590 *ret = hextochar(&str[i+1]); 1591 i+=2; 1592 continue; 1593 } 1594 *ret = c; 1595 } 1596 *ret = '\0'; 1597 1598 return ret-reallen; 1599 } 1600 1601 static char * 1602 recode_credentials(const char *userinfo) 1603 { 1604 char *ui, *creds; 1605 size_t ulen, credsize; 1606 1607 /* url-decode the user and pass */ 1608 ui = urldecode(userinfo); 1609 1610 ulen = strlen(ui); 1611 credsize = (ulen + 2) / 3 * 4 + 1; 1612 creds = malloc(credsize); 1613 if (creds == NULL) 1614 errx(1, "out of memory"); 1615 if (b64_ntop(ui, ulen, creds, credsize) == -1) 1616 errx(1, "error in base64 encoding"); 1617 free(ui); 1618 return (creds); 1619 } 1620 1621 static char 1622 hextochar(const char *str) 1623 { 1624 unsigned char c, ret; 1625 1626 c = str[0]; 1627 ret = c; 1628 if (isalpha(c)) 1629 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1630 else 1631 ret -= '0'; 1632 ret *= 16; 1633 1634 c = str[1]; 1635 ret += c; 1636 if (isalpha(c)) 1637 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1638 else 1639 ret -= '0'; 1640 return ret; 1641 } 1642 1643 int 1644 isurl(const char *p) 1645 { 1646 1647 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 1648 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1649 #ifndef NOSSL 1650 strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 || 1651 #endif /* !NOSSL */ 1652 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 1653 strstr(p, ":/")) 1654 return (1); 1655 return (0); 1656 } 1657 1658 #ifndef SMALL 1659 static int 1660 ftp_printf(FILE *fp, const char *fmt, ...) 1661 { 1662 va_list ap; 1663 int ret; 1664 1665 va_start(ap, fmt); 1666 ret = vfprintf(fp, fmt, ap); 1667 va_end(ap); 1668 1669 if (debug) { 1670 va_start(ap, fmt); 1671 vfprintf(ttyout, fmt, ap); 1672 va_end(ap); 1673 } 1674 1675 return ret; 1676 } 1677 #endif /* !SMALL */ 1678 1679 static void 1680 ftp_close(FILE **fin, struct tls **tls, int *fd) 1681 { 1682 #ifndef NOSSL 1683 int ret; 1684 1685 if (*tls != NULL) { 1686 if (tls_session_fd != -1) 1687 dprintf(STDERR_FILENO, "tls session resumed: %s\n", 1688 tls_conn_session_resumed(*tls) ? "yes" : "no"); 1689 do { 1690 ret = tls_close(*tls); 1691 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1692 tls_free(*tls); 1693 *tls = NULL; 1694 } 1695 if (*fd != -1) { 1696 close(*fd); 1697 *fd = -1; 1698 } 1699 #endif 1700 if (*fin != NULL) { 1701 fclose(*fin); 1702 *fin = NULL; 1703 } 1704 } 1705 1706 static const char * 1707 sockerror(struct tls *tls) 1708 { 1709 int save_errno = errno; 1710 #ifndef NOSSL 1711 if (tls != NULL) { 1712 const char *tlserr = tls_error(tls); 1713 if (tlserr != NULL) 1714 return tlserr; 1715 } 1716 #endif 1717 return strerror(save_errno); 1718 } 1719 1720 #ifndef NOSSL 1721 static int 1722 proxy_connect(int socket, char *host, char *cookie) 1723 { 1724 int l; 1725 char buf[1024]; 1726 char *connstr, *hosttail, *port; 1727 1728 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 1729 (hosttail[1] == '\0' || hosttail[1] == ':')) { 1730 host++; 1731 *hosttail++ = '\0'; 1732 } else 1733 hosttail = host; 1734 1735 port = strrchr(hosttail, ':'); /* find portnum */ 1736 if (port != NULL) 1737 *port++ = '\0'; 1738 if (!port) 1739 port = "443"; 1740 1741 if (cookie) { 1742 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1743 "Proxy-Authorization: Basic %s\r\n%s\r\n\r\n", 1744 host, port, cookie, HTTP_USER_AGENT); 1745 } else { 1746 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n%s\r\n\r\n", 1747 host, port, HTTP_USER_AGENT); 1748 } 1749 1750 if (l == -1) 1751 errx(1, "Could not allocate memory to assemble connect string!"); 1752 #ifndef SMALL 1753 if (debug) 1754 printf("%s", connstr); 1755 #endif /* !SMALL */ 1756 if (write(socket, connstr, l) != l) 1757 err(1, "Could not send connect string"); 1758 read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */ 1759 free(connstr); 1760 return(200); 1761 } 1762 1763 static int 1764 stdio_tls_write_wrapper(void *arg, const char *buf, int len) 1765 { 1766 struct tls *tls = arg; 1767 ssize_t ret; 1768 1769 do { 1770 ret = tls_write(tls, buf, len); 1771 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1772 1773 return ret; 1774 } 1775 1776 static int 1777 stdio_tls_read_wrapper(void *arg, char *buf, int len) 1778 { 1779 struct tls *tls = arg; 1780 ssize_t ret; 1781 1782 do { 1783 ret = tls_read(tls, buf, len); 1784 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1785 1786 return ret; 1787 } 1788 #endif /* !NOSSL */ 1789