1 /* $OpenBSD: fetch.c,v 1.218 2024/04/23 08:50:38 sthen Exp $ */ 2 /* $NetBSD: fetch.c,v 1.14 1997/08/18 10:20:20 lukem Exp $ */ 3 4 /*- 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason Thorpe and Luke Mewburn. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * FTP User Program -- Command line file retrieval 35 */ 36 37 #include <sys/types.h> 38 #include <sys/socket.h> 39 #include <sys/stat.h> 40 41 #include <netinet/in.h> 42 43 #include <arpa/ftp.h> 44 #include <arpa/inet.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <libgen.h> 49 #include <netdb.h> 50 #include <fcntl.h> 51 #include <signal.h> 52 #include <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 RFC2396. 110 */ 111 static int 112 to_encode(const char *c0) 113 { 114 /* 2.4.3. Excluded US-ASCII Characters */ 115 const char *excluded_chars = 116 " " /* space */ 117 "<>#\"" /* delims (modulo "%", see below) */ 118 "{}|\\^[]`" /* unwise */ 119 ; 120 const unsigned char *c = (const unsigned char *)c0; 121 122 /* 123 * No corresponding graphic US-ASCII. 124 * Control characters and octets not used in US-ASCII. 125 */ 126 return (iscntrl(*c) || !isascii(*c) || 127 128 /* 129 * '%' is also reserved, if is not followed by two 130 * hexadecimal digits. 131 */ 132 strchr(excluded_chars, *c) != NULL || 133 (*c == '%' && (!isxdigit(c[1]) || !isxdigit(c[2])))); 134 } 135 136 /* 137 * Encode given URL, per RFC2396. 138 * Allocate and return string to the caller. 139 */ 140 static char * 141 url_encode(const char *path) 142 { 143 size_t i, length, new_length; 144 char *epath, *epathp; 145 146 length = new_length = strlen(path); 147 148 /* 149 * First pass: 150 * Count characters to encode and determine length of the final URL. 151 */ 152 for (i = 0; i < length; i++) 153 if (to_encode(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 (to_encode(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 /* 177 * Copy a local file (used by the OpenBSD installer). 178 * Returns -1 on failure, 0 on success 179 */ 180 static int 181 file_get(const char *path, const char *outfile) 182 { 183 struct stat st; 184 int fd, out = -1, rval = -1, save_errno; 185 volatile sig_t oldintr, oldinti; 186 const char *savefile; 187 char *buf = NULL, *cp, *pathbuf = NULL; 188 const size_t buflen = 128 * 1024; 189 off_t hashbytes; 190 ssize_t len, wlen; 191 192 direction = "received"; 193 194 fd = open(path, O_RDONLY); 195 if (fd == -1) { 196 warn("Can't open file %s", path); 197 return -1; 198 } 199 200 if (fstat(fd, &st) == -1) 201 filesize = -1; 202 else 203 filesize = st.st_size; 204 205 if (outfile != NULL) 206 savefile = outfile; 207 else { 208 if (path[strlen(path) - 1] == '/') /* Consider no file */ 209 savefile = NULL; /* after dir invalid. */ 210 else { 211 pathbuf = strdup(path); 212 if (pathbuf == NULL) 213 errx(1, "Can't allocate memory for filename"); 214 savefile = basename(pathbuf); 215 } 216 } 217 218 if (EMPTYSTRING(savefile)) { 219 warnx("No filename after directory (use -o): %s", path); 220 goto cleanup_copy; 221 } 222 223 /* Open the output file. */ 224 if (!pipeout) { 225 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 0666); 226 if (out == -1) { 227 warn("Can't open %s", savefile); 228 goto cleanup_copy; 229 } 230 } else 231 out = fileno(stdout); 232 233 if ((buf = malloc(buflen)) == NULL) 234 errx(1, "Can't allocate memory for transfer buffer"); 235 236 /* Trap signals */ 237 oldintr = NULL; 238 oldinti = NULL; 239 if (setjmp(httpabort)) { 240 if (oldintr) 241 (void)signal(SIGINT, oldintr); 242 if (oldinti) 243 (void)signal(SIGINFO, oldinti); 244 goto cleanup_copy; 245 } 246 oldintr = signal(SIGINT, aborthttp); 247 248 bytes = 0; 249 hashbytes = mark; 250 progressmeter(-1, path); 251 252 /* Finally, suck down the file. */ 253 oldinti = signal(SIGINFO, psummary); 254 while ((len = read(fd, buf, buflen)) > 0) { 255 bytes += len; 256 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 257 if ((wlen = write(out, cp, len)) == -1) { 258 warn("Writing %s", savefile); 259 signal(SIGINT, oldintr); 260 signal(SIGINFO, oldinti); 261 goto cleanup_copy; 262 } 263 } 264 if (hash && !progress) { 265 while (bytes >= hashbytes) { 266 (void)putc('#', ttyout); 267 hashbytes += mark; 268 } 269 (void)fflush(ttyout); 270 } 271 } 272 save_errno = errno; 273 signal(SIGINT, oldintr); 274 signal(SIGINFO, oldinti); 275 if (hash && !progress && bytes > 0) { 276 if (bytes < mark) 277 (void)putc('#', ttyout); 278 (void)putc('\n', ttyout); 279 (void)fflush(ttyout); 280 } 281 if (len == -1) { 282 warnc(save_errno, "Reading from file"); 283 goto cleanup_copy; 284 } 285 progressmeter(1, NULL); 286 if (verbose) 287 ptransfer(0); 288 289 rval = 0; 290 291 cleanup_copy: 292 free(buf); 293 free(pathbuf); 294 if (out >= 0 && out != fileno(stdout)) 295 close(out); 296 close(fd); 297 298 return rval; 299 } 300 301 /* 302 * Retrieve URL, via the proxy in $proxyvar if necessary. 303 * Returns -1 on failure, 0 on success 304 */ 305 static int 306 url_get(const char *origline, const char *proxyenv, const char *outfile, int lastfile) 307 { 308 char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST], *cp, *portnum, *path, ststr[4]; 309 char *hosttail, *cause = "unknown", *newline, *host, *port, *buf = NULL; 310 char *epath, *redirurl, *loctail, *h, *p, gerror[200]; 311 int error, isftpurl = 0, isredirect = 0, rval = -1; 312 int isunavail = 0, retryafter = -1; 313 struct addrinfo hints, *res0, *res; 314 const char *savefile; 315 char *pathbuf = NULL; 316 char *proxyurl = NULL; 317 char *credentials = NULL, *proxy_credentials = NULL; 318 int fd = -1, out = -1; 319 volatile sig_t oldintr, oldinti; 320 FILE *fin = NULL; 321 off_t hashbytes; 322 const char *errstr; 323 ssize_t len, wlen; 324 size_t bufsize; 325 char *proxyhost = NULL; 326 #ifndef NOSSL 327 char *sslpath = NULL, *sslhost = NULL; 328 int ishttpsurl = 0; 329 #endif /* !NOSSL */ 330 #ifndef SMALL 331 char *full_host = NULL; 332 const char *scheme; 333 char *locbase; 334 struct addrinfo *ares = NULL; 335 char tmbuf[32]; 336 time_t mtime = 0; 337 struct stat stbuf; 338 struct tm lmt = { 0 }; 339 struct timespec ts[2]; 340 #endif /* !SMALL */ 341 struct tls *tls = NULL; 342 int status; 343 int save_errno; 344 const size_t buflen = 128 * 1024; 345 int chunked = 0; 346 347 direction = "received"; 348 349 newline = strdup(origline); 350 if (newline == NULL) 351 errx(1, "Can't allocate memory to parse URL"); 352 if (strncasecmp(newline, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 353 host = newline + sizeof(HTTP_URL) - 1; 354 #ifndef SMALL 355 scheme = HTTP_URL; 356 #endif /* !SMALL */ 357 } else if (strncasecmp(newline, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 358 host = newline + sizeof(FTP_URL) - 1; 359 isftpurl = 1; 360 #ifndef SMALL 361 scheme = FTP_URL; 362 #endif /* !SMALL */ 363 } else if (strncasecmp(newline, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0) { 364 #ifndef NOSSL 365 host = newline + sizeof(HTTPS_URL) - 1; 366 ishttpsurl = 1; 367 #else 368 errx(1, "%s: No HTTPS support", newline); 369 #endif /* !NOSSL */ 370 #ifndef SMALL 371 scheme = HTTPS_URL; 372 #endif /* !SMALL */ 373 } else 374 errx(1, "%s: URL not permitted", newline); 375 376 path = strchr(host, '/'); /* Find path */ 377 378 /* 379 * Look for auth header in host. 380 * Basic auth from RFC 2617, valid characters for path are in 381 * RFC 3986 section 3.3. 382 */ 383 if (!isftpurl) { 384 p = strchr(host, '@'); 385 if (p != NULL && (path == NULL || p < path)) { 386 *p++ = '\0'; 387 credentials = recode_credentials(host); 388 389 /* Overwrite userinfo */ 390 memmove(host, p, strlen(p) + 1); 391 path = strchr(host, '/'); 392 } 393 } 394 395 if (EMPTYSTRING(path)) { 396 if (outfile) { /* No slash, but */ 397 path = strchr(host,'\0'); /* we have outfile. */ 398 goto noslash; 399 } 400 if (isftpurl) 401 goto noftpautologin; 402 warnx("No `/' after host (use -o): %s", origline); 403 goto cleanup_url_get; 404 } 405 *path++ = '\0'; 406 if (EMPTYSTRING(path) && !outfile) { 407 if (isftpurl) 408 goto noftpautologin; 409 warnx("No filename after host (use -o): %s", origline); 410 goto cleanup_url_get; 411 } 412 413 noslash: 414 if (outfile) 415 savefile = outfile; 416 else { 417 if (path[strlen(path) - 1] == '/') /* Consider no file */ 418 savefile = NULL; /* after dir invalid. */ 419 else { 420 pathbuf = strdup(path); 421 if (pathbuf == NULL) 422 errx(1, "Can't allocate memory for filename"); 423 savefile = basename(pathbuf); 424 } 425 } 426 427 if (EMPTYSTRING(savefile)) { 428 if (isftpurl) 429 goto noftpautologin; 430 warnx("No filename after directory (use -o): %s", origline); 431 goto cleanup_url_get; 432 } 433 434 #ifndef SMALL 435 if (resume && pipeout) { 436 warnx("can't append to stdout"); 437 goto cleanup_url_get; 438 } 439 #endif /* !SMALL */ 440 441 if (proxyenv != NULL) { /* use proxy */ 442 #ifndef NOSSL 443 if (ishttpsurl) { 444 sslpath = strdup(path); 445 sslhost = strdup(host); 446 if (! sslpath || ! sslhost) 447 errx(1, "Can't allocate memory for https path/host."); 448 } 449 #endif /* !NOSSL */ 450 proxyhost = strdup(host); 451 if (proxyhost == NULL) 452 errx(1, "Can't allocate memory for proxy host."); 453 proxyurl = strdup(proxyenv); 454 if (proxyurl == NULL) 455 errx(1, "Can't allocate memory for proxy URL."); 456 if (strncasecmp(proxyurl, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 457 host = proxyurl + sizeof(HTTP_URL) - 1; 458 else if (strncasecmp(proxyurl, FTP_URL, sizeof(FTP_URL) - 1) == 0) 459 host = proxyurl + sizeof(FTP_URL) - 1; 460 else { 461 warnx("Malformed proxy URL: %s", proxyenv); 462 goto cleanup_url_get; 463 } 464 if (EMPTYSTRING(host)) { 465 warnx("Malformed proxy URL: %s", proxyenv); 466 goto cleanup_url_get; 467 } 468 if (*--path == '\0') 469 *path = '/'; /* add / back to real path */ 470 path = strchr(host, '/'); /* remove trailing / on host */ 471 if (!EMPTYSTRING(path)) 472 *path++ = '\0'; /* i guess this ++ is useless */ 473 474 path = strchr(host, '@'); /* look for credentials in proxy */ 475 if (!EMPTYSTRING(path)) { 476 *path = '\0'; 477 if (strchr(host, ':') == NULL) { 478 warnx("Malformed proxy URL: %s", proxyenv); 479 goto cleanup_url_get; 480 } 481 proxy_credentials = recode_credentials(host); 482 *path = '@'; /* restore @ in proxyurl */ 483 484 /* 485 * This removes the password from proxyurl, 486 * filling with stars 487 */ 488 for (host = 1 + strchr(proxyurl + 5, ':'); *host != '@'; 489 host++) 490 *host = '*'; 491 492 host = path + 1; 493 } 494 495 path = newline; 496 } 497 498 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 499 (hosttail[1] == '\0' || hosttail[1] == ':')) { 500 host++; 501 *hosttail++ = '\0'; 502 #ifndef SMALL 503 if (asprintf(&full_host, "[%s]", host) == -1) 504 errx(1, "Cannot allocate memory for hostname"); 505 #endif /* !SMALL */ 506 } else 507 hosttail = host; 508 509 portnum = strrchr(hosttail, ':'); /* find portnum */ 510 if (portnum != NULL) 511 *portnum++ = '\0'; 512 #ifndef NOSSL 513 port = portnum ? portnum : (ishttpsurl ? httpsport : httpport); 514 #else /* !NOSSL */ 515 port = portnum ? portnum : httpport; 516 #endif /* !NOSSL */ 517 518 #ifndef SMALL 519 if (full_host == NULL) 520 if ((full_host = strdup(host)) == NULL) 521 errx(1, "Cannot allocate memory for hostname"); 522 if (debug) 523 fprintf(ttyout, "host %s, port %s, path %s, " 524 "save as %s, auth %s.\n", host, port, path, 525 savefile, credentials ? credentials : "none"); 526 #endif /* !SMALL */ 527 528 memset(&hints, 0, sizeof(hints)); 529 hints.ai_family = family; 530 hints.ai_socktype = SOCK_STREAM; 531 error = getaddrinfo(host, port, &hints, &res0); 532 /* 533 * If the services file is corrupt/missing, fall back 534 * on our hard-coded defines. 535 */ 536 if (error == EAI_SERVICE && port == httpport) { 537 snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT); 538 error = getaddrinfo(host, pbuf, &hints, &res0); 539 #ifndef NOSSL 540 } else if (error == EAI_SERVICE && port == httpsport) { 541 snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT); 542 error = getaddrinfo(host, pbuf, &hints, &res0); 543 #endif /* !NOSSL */ 544 } 545 if (error) { 546 warnx("%s: %s", host, gai_strerror(error)); 547 goto cleanup_url_get; 548 } 549 550 #ifndef SMALL 551 if (srcaddr) { 552 hints.ai_flags |= AI_NUMERICHOST; 553 error = getaddrinfo(srcaddr, NULL, &hints, &ares); 554 if (error) { 555 warnx("%s: %s", srcaddr, gai_strerror(error)); 556 goto cleanup_url_get; 557 } 558 } 559 #endif /* !SMALL */ 560 561 /* ensure consistent order of the output */ 562 if (verbose) 563 setvbuf(ttyout, NULL, _IOLBF, 0); 564 565 fd = -1; 566 for (res = res0; res; res = res->ai_next) { 567 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 568 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 569 strlcpy(hbuf, "(unknown)", sizeof(hbuf)); 570 if (verbose) 571 fprintf(ttyout, "Trying %s...\n", hbuf); 572 573 fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 574 if (fd == -1) { 575 cause = "socket"; 576 continue; 577 } 578 579 #ifndef SMALL 580 if (srcaddr) { 581 if (ares->ai_family != res->ai_family) { 582 close(fd); 583 fd = -1; 584 errno = EINVAL; 585 cause = "bind"; 586 continue; 587 } 588 if (bind(fd, ares->ai_addr, ares->ai_addrlen) == -1) { 589 save_errno = errno; 590 close(fd); 591 errno = save_errno; 592 fd = -1; 593 cause = "bind"; 594 continue; 595 } 596 } 597 #endif /* !SMALL */ 598 599 error = timed_connect(fd, res->ai_addr, res->ai_addrlen, 600 connect_timeout); 601 if (error != 0) { 602 save_errno = errno; 603 close(fd); 604 errno = save_errno; 605 fd = -1; 606 cause = "connect"; 607 continue; 608 } 609 610 /* get port in numeric */ 611 if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0, 612 pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0) 613 port = pbuf; 614 else 615 port = NULL; 616 617 #ifndef NOSSL 618 if (proxyenv && sslhost) 619 proxy_connect(fd, sslhost, proxy_credentials); 620 #endif /* !NOSSL */ 621 break; 622 } 623 freeaddrinfo(res0); 624 #ifndef SMALL 625 if (srcaddr) 626 freeaddrinfo(ares); 627 #endif /* !SMALL */ 628 if (fd < 0) { 629 warn("%s", cause); 630 goto cleanup_url_get; 631 } 632 633 #ifndef NOSSL 634 if (ishttpsurl) { 635 ssize_t ret; 636 if (proxyenv && sslpath) { 637 ishttpsurl = 0; 638 proxyurl = NULL; 639 path = sslpath; 640 } 641 if (sslhost == NULL) { 642 sslhost = strdup(host); 643 if (sslhost == NULL) 644 errx(1, "Can't allocate memory for https host."); 645 } 646 if ((tls = tls_client()) == NULL) { 647 fprintf(ttyout, "failed to create SSL client\n"); 648 goto cleanup_url_get; 649 } 650 if (tls_configure(tls, tls_config) != 0) { 651 fprintf(ttyout, "TLS configuration failure: %s\n", 652 tls_error(tls)); 653 goto cleanup_url_get; 654 } 655 if (tls_connect_socket(tls, fd, sslhost) != 0) { 656 fprintf(ttyout, "TLS connect failure: %s\n", tls_error(tls)); 657 goto cleanup_url_get; 658 } 659 do { 660 ret = tls_handshake(tls); 661 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 662 if (ret != 0) { 663 fprintf(ttyout, "TLS handshake failure: %s\n", tls_error(tls)); 664 goto cleanup_url_get; 665 } 666 fin = funopen(tls, stdio_tls_read_wrapper, 667 stdio_tls_write_wrapper, NULL, NULL); 668 } else { 669 fin = fdopen(fd, "r+"); 670 fd = -1; 671 } 672 #else /* !NOSSL */ 673 fin = fdopen(fd, "r+"); 674 fd = -1; 675 #endif /* !NOSSL */ 676 677 #ifdef SMALL 678 if (lastfile) { 679 if (pipeout) { 680 if (pledge("stdio rpath inet dns tty", NULL) == -1) 681 err(1, "pledge"); 682 } else { 683 if (pledge("stdio rpath wpath cpath inet dns tty", NULL) == -1) 684 err(1, "pledge"); 685 } 686 } 687 #endif 688 689 /* 690 * Construct and send the request. Proxy requests don't want leading /. 691 */ 692 #ifndef NOSSL 693 cookie_get(host, path, ishttpsurl, &buf); 694 #endif /* !NOSSL */ 695 696 epath = url_encode(path); 697 if (proxyurl) { 698 if (verbose) { 699 fprintf(ttyout, "Requesting %s (via %s)\n", 700 origline, proxyurl); 701 } 702 /* 703 * Host: directive must use the destination host address for 704 * the original URI (path). 705 */ 706 ftp_printf(fin, "GET %s HTTP/1.1\r\n" 707 "Connection: close\r\n" 708 "Host: %s\r\n%s%s\r\n" 709 "Accept: */*\r\n", 710 epath, proxyhost, buf ? buf : "", httpuseragent); 711 if (credentials) 712 ftp_printf(fin, "Authorization: Basic %s\r\n", 713 credentials); 714 if (proxy_credentials) 715 ftp_printf(fin, "Proxy-Authorization: Basic %s\r\n", 716 proxy_credentials); 717 ftp_printf(fin, "\r\n"); 718 } else { 719 if (verbose) 720 fprintf(ttyout, "Requesting %s\n", origline); 721 #ifndef SMALL 722 if (resume || timestamp) { 723 if (stat(savefile, &stbuf) == 0) { 724 if (resume) 725 restart_point = stbuf.st_size; 726 if (timestamp) 727 mtime = stbuf.st_mtime; 728 } else { 729 restart_point = 0; 730 mtime = 0; 731 } 732 } 733 #endif /* SMALL */ 734 ftp_printf(fin, 735 "GET /%s HTTP/1.1\r\n" 736 "Connection: close\r\n" 737 "Host: ", epath); 738 if (proxyhost) { 739 ftp_printf(fin, "%s", proxyhost); 740 port = NULL; 741 } else if (strchr(host, ':')) { 742 /* 743 * strip off scoped address portion, since it's 744 * local to node 745 */ 746 h = strdup(host); 747 if (h == NULL) 748 errx(1, "Can't allocate memory."); 749 if ((p = strchr(h, '%')) != NULL) 750 *p = '\0'; 751 ftp_printf(fin, "[%s]", h); 752 free(h); 753 } else 754 ftp_printf(fin, "%s", host); 755 756 /* 757 * Send port number only if it's specified and does not equal 758 * 80. Some broken HTTP servers get confused if you explicitly 759 * send them the port number. 760 */ 761 #ifndef NOSSL 762 if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0) 763 ftp_printf(fin, ":%s", port); 764 if (restart_point) 765 ftp_printf(fin, "\r\nRange: bytes=%lld-", 766 (long long)restart_point); 767 #else /* !NOSSL */ 768 if (port && strcmp(port, "80") != 0) 769 ftp_printf(fin, ":%s", port); 770 #endif /* !NOSSL */ 771 772 #ifndef SMALL 773 if (mtime && (http_time(mtime, tmbuf, sizeof(tmbuf)) != 0)) 774 ftp_printf(fin, "\r\nIf-Modified-Since: %s", tmbuf); 775 #endif /* SMALL */ 776 777 ftp_printf(fin, "\r\n%s%s\r\n", buf ? buf : "", httpuseragent); 778 ftp_printf(fin, "Accept: */*\r\n"); 779 if (credentials) 780 ftp_printf(fin, "Authorization: Basic %s\r\n", 781 credentials); 782 ftp_printf(fin, "\r\n"); 783 } 784 free(epath); 785 786 #ifndef NOSSL 787 free(buf); 788 #endif /* !NOSSL */ 789 buf = NULL; 790 bufsize = 0; 791 792 if (fflush(fin) == EOF) { 793 warnx("Writing HTTP request: %s", sockerror(tls)); 794 goto cleanup_url_get; 795 } 796 if ((len = getline(&buf, &bufsize, fin)) == -1) { 797 warnx("Receiving HTTP reply: %s", sockerror(tls)); 798 goto cleanup_url_get; 799 } 800 801 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 802 buf[--len] = '\0'; 803 #ifndef SMALL 804 if (debug) 805 fprintf(ttyout, "received '%s'\n", buf); 806 #endif /* !SMALL */ 807 808 cp = strchr(buf, ' '); 809 if (cp == NULL) 810 goto improper; 811 else 812 cp++; 813 814 strlcpy(ststr, cp, sizeof(ststr)); 815 status = strtonum(ststr, 200, 503, &errstr); 816 if (errstr) { 817 strnvis(gerror, cp, sizeof gerror, VIS_SAFE); 818 warnx("Error retrieving %s: %s", origline, gerror); 819 goto cleanup_url_get; 820 } 821 822 switch (status) { 823 case 200: /* OK */ 824 #ifndef SMALL 825 /* 826 * When we request a partial file, and we receive an HTTP 200 827 * it is a good indication that the server doesn't support 828 * range requests, and is about to send us the entire file. 829 * If the restart_point == 0, then we are not actually 830 * requesting a partial file, and an HTTP 200 is appropriate. 831 */ 832 if (resume && restart_point != 0) { 833 warnx("Server does not support resume."); 834 restart_point = resume = 0; 835 } 836 /* FALLTHROUGH */ 837 case 206: /* Partial Content */ 838 #endif /* !SMALL */ 839 break; 840 case 301: /* Moved Permanently */ 841 case 302: /* Found */ 842 case 303: /* See Other */ 843 case 307: /* Temporary Redirect */ 844 case 308: /* Permanent Redirect (RFC 7538) */ 845 isredirect++; 846 if (redirect_loop++ > 10) { 847 warnx("Too many redirections requested"); 848 goto cleanup_url_get; 849 } 850 break; 851 #ifndef SMALL 852 case 304: /* Not Modified */ 853 warnx("File is not modified on the server"); 854 goto cleanup_url_get; 855 case 416: /* Requested Range Not Satisfiable */ 856 warnx("File is already fully retrieved."); 857 goto cleanup_url_get; 858 #endif /* !SMALL */ 859 case 503: 860 isunavail = 1; 861 break; 862 default: 863 strnvis(gerror, cp, sizeof gerror, VIS_SAFE); 864 warnx("Error retrieving %s: %s", origline, gerror); 865 goto cleanup_url_get; 866 } 867 868 /* 869 * Read the rest of the header. 870 */ 871 filesize = -1; 872 873 for (;;) { 874 if ((len = getline(&buf, &bufsize, fin)) == -1) { 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-1] == ' ' || buf[len-1] == '\t')) 881 buf[--len] = '\0'; 882 if (len == 0) 883 break; 884 #ifndef SMALL 885 if (debug) 886 fprintf(ttyout, "received '%s'\n", buf); 887 #endif /* !SMALL */ 888 889 /* Look for some headers */ 890 cp = buf; 891 #define CONTENTLEN "Content-Length:" 892 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 893 cp += sizeof(CONTENTLEN) - 1; 894 cp += strspn(cp, " \t"); 895 filesize = strtonum(cp, 0, LLONG_MAX, &errstr); 896 if (errstr != NULL) 897 goto improper; 898 #ifndef SMALL 899 if (restart_point) 900 filesize += restart_point; 901 #endif /* !SMALL */ 902 #define LOCATION "Location:" 903 } else if (isredirect && 904 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 905 cp += sizeof(LOCATION) - 1; 906 cp += strspn(cp, " \t"); 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 /* Construct 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 char *visbuf; 955 if (stravis(&visbuf, redirurl, VIS_SAFE) == -1) 956 err(1, "Cannot vis redirect URL"); 957 fprintf(ttyout, "Redirected to %s\n", visbuf); 958 free(visbuf); 959 } 960 ftp_close(&fin, &tls, &fd); 961 rval = url_get(redirurl, proxyenv, savefile, lastfile); 962 free(redirurl); 963 goto cleanup_url_get; 964 #define RETRYAFTER "Retry-After:" 965 } else if (isunavail && 966 strncasecmp(cp, RETRYAFTER, sizeof(RETRYAFTER) - 1) == 0) { 967 cp += sizeof(RETRYAFTER) - 1; 968 cp += strspn(cp, " \t"); 969 retryafter = strtonum(cp, 0, 0, &errstr); 970 if (errstr != NULL) 971 retryafter = -1; 972 #define TRANSFER_ENCODING "Transfer-Encoding:" 973 } else if (strncasecmp(cp, TRANSFER_ENCODING, 974 sizeof(TRANSFER_ENCODING) - 1) == 0) { 975 cp += sizeof(TRANSFER_ENCODING) - 1; 976 cp += strspn(cp, " \t"); 977 if (strcasecmp(cp, "chunked") == 0) 978 chunked = 1; 979 #ifndef SMALL 980 #define LAST_MODIFIED "Last-Modified:" 981 } else if (strncasecmp(cp, LAST_MODIFIED, 982 sizeof(LAST_MODIFIED) - 1) == 0) { 983 cp += sizeof(LAST_MODIFIED) - 1; 984 cp += strspn(cp, " \t"); 985 if (strptime(cp, "%a, %d %h %Y %T %Z", &lmt) == NULL) 986 server_timestamps = 0; 987 #endif /* !SMALL */ 988 } 989 } 990 free(buf); 991 buf = NULL; 992 993 /* Content-Length should be ignored for Transfer-Encoding: chunked */ 994 if (chunked) 995 filesize = -1; 996 997 if (isunavail) { 998 if (retried || retryafter != 0) 999 warnx("Error retrieving %s: 503 Service Unavailable", 1000 origline); 1001 else { 1002 if (verbose) 1003 fprintf(ttyout, "Retrying %s\n", origline); 1004 retried = 1; 1005 ftp_close(&fin, &tls, &fd); 1006 rval = url_get(origline, proxyenv, savefile, lastfile); 1007 } 1008 goto cleanup_url_get; 1009 } 1010 1011 /* Open the output file. */ 1012 if (!pipeout) { 1013 #ifndef SMALL 1014 if (resume) 1015 out = open(savefile, O_CREAT | O_WRONLY | O_APPEND, 1016 0666); 1017 else 1018 #endif /* !SMALL */ 1019 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 1020 0666); 1021 if (out == -1) { 1022 warn("Can't open %s", savefile); 1023 goto cleanup_url_get; 1024 } 1025 } else { 1026 out = fileno(stdout); 1027 #ifdef SMALL 1028 if (lastfile) { 1029 if (pledge("stdio tty", NULL) == -1) 1030 err(1, "pledge"); 1031 } 1032 #endif 1033 } 1034 1035 if ((buf = malloc(buflen)) == NULL) 1036 errx(1, "Can't allocate memory for transfer buffer"); 1037 1038 /* Trap signals */ 1039 oldintr = NULL; 1040 oldinti = NULL; 1041 if (setjmp(httpabort)) { 1042 if (oldintr) 1043 (void)signal(SIGINT, oldintr); 1044 if (oldinti) 1045 (void)signal(SIGINFO, oldinti); 1046 goto cleanup_url_get; 1047 } 1048 oldintr = signal(SIGINT, aborthttp); 1049 1050 bytes = 0; 1051 hashbytes = mark; 1052 progressmeter(-1, path); 1053 1054 /* Finally, suck down the file. */ 1055 oldinti = signal(SIGINFO, psummary); 1056 if (chunked) { 1057 error = save_chunked(fin, tls, out, buf, buflen); 1058 signal(SIGINT, oldintr); 1059 signal(SIGINFO, oldinti); 1060 if (error == -1) 1061 goto cleanup_url_get; 1062 } else { 1063 while ((len = fread(buf, 1, buflen, fin)) > 0) { 1064 bytes += len; 1065 for (cp = buf; len > 0; len -= wlen, cp += wlen) { 1066 if ((wlen = write(out, cp, len)) == -1) { 1067 warn("Writing %s", savefile); 1068 signal(SIGINT, oldintr); 1069 signal(SIGINFO, oldinti); 1070 goto cleanup_url_get; 1071 } 1072 } 1073 if (hash && !progress) { 1074 while (bytes >= hashbytes) { 1075 (void)putc('#', ttyout); 1076 hashbytes += mark; 1077 } 1078 (void)fflush(ttyout); 1079 } 1080 } 1081 save_errno = errno; 1082 signal(SIGINT, oldintr); 1083 signal(SIGINFO, oldinti); 1084 if (hash && !progress && bytes > 0) { 1085 if (bytes < mark) 1086 (void)putc('#', ttyout); 1087 (void)putc('\n', ttyout); 1088 (void)fflush(ttyout); 1089 } 1090 if (len == 0 && ferror(fin)) { 1091 errno = save_errno; 1092 warnx("Reading from socket: %s", sockerror(tls)); 1093 goto cleanup_url_get; 1094 } 1095 } 1096 progressmeter(1, NULL); 1097 if ( 1098 #ifndef SMALL 1099 !resume && 1100 #endif /* !SMALL */ 1101 filesize != -1 && len == 0 && bytes != filesize) { 1102 if (verbose) 1103 fputs("Read short file.\n", ttyout); 1104 goto cleanup_url_get; 1105 } 1106 1107 if (verbose) 1108 ptransfer(0); 1109 1110 rval = 0; 1111 goto cleanup_url_get; 1112 1113 noftpautologin: 1114 warnx( 1115 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 1116 goto cleanup_url_get; 1117 1118 improper: 1119 warnx("Improper response from %s", host); 1120 1121 cleanup_url_get: 1122 #ifndef SMALL 1123 free(full_host); 1124 #endif /* !SMALL */ 1125 #ifndef NOSSL 1126 free(sslhost); 1127 #endif /* !NOSSL */ 1128 ftp_close(&fin, &tls, &fd); 1129 if (out >= 0 && out != fileno(stdout)) { 1130 #ifndef SMALL 1131 if (server_timestamps && lmt.tm_zone != 0 && 1132 fstat(out, &stbuf) == 0 && S_ISREG(stbuf.st_mode) != 0) { 1133 ts[0].tv_nsec = UTIME_NOW; 1134 ts[1].tv_nsec = 0; 1135 setenv("TZ", lmt.tm_zone, 1); 1136 if (((ts[1].tv_sec = mktime(&lmt)) != -1) && 1137 (futimens(out, ts) == -1)) 1138 warnx("Unable to set file modification time"); 1139 } 1140 #endif /* !SMALL */ 1141 close(out); 1142 } 1143 free(buf); 1144 free(pathbuf); 1145 free(proxyhost); 1146 free(proxyurl); 1147 free(newline); 1148 free(credentials); 1149 free(proxy_credentials); 1150 return (rval); 1151 } 1152 1153 static int 1154 save_chunked(FILE *fin, struct tls *tls, int out, char *buf, size_t buflen) 1155 { 1156 1157 char *header = NULL, *end, *cp; 1158 unsigned long chunksize; 1159 size_t hsize = 0, rlen, wlen; 1160 ssize_t written; 1161 char cr, lf; 1162 1163 for (;;) { 1164 if (getline(&header, &hsize, fin) == -1) 1165 break; 1166 /* strip CRLF and any optional chunk extension */ 1167 header[strcspn(header, "; \t\r\n")] = '\0'; 1168 errno = 0; 1169 chunksize = strtoul(header, &end, 16); 1170 if (errno || header[0] == '\0' || *end != '\0' || 1171 chunksize > INT_MAX) { 1172 warnx("Invalid chunk size '%s'", header); 1173 free(header); 1174 return -1; 1175 } 1176 1177 if (chunksize == 0) { 1178 /* We're done. Ignore optional trailer. */ 1179 free(header); 1180 return 0; 1181 } 1182 1183 for (written = 0; chunksize != 0; chunksize -= rlen) { 1184 rlen = (chunksize < buflen) ? chunksize : buflen; 1185 rlen = fread(buf, 1, rlen, fin); 1186 if (rlen == 0) 1187 break; 1188 bytes += rlen; 1189 for (cp = buf, wlen = rlen; wlen > 0; 1190 wlen -= written, cp += written) { 1191 if ((written = write(out, cp, wlen)) == -1) { 1192 warn("Writing output file"); 1193 free(header); 1194 return -1; 1195 } 1196 } 1197 } 1198 1199 if (rlen == 0 || 1200 fread(&cr, 1, 1, fin) != 1 || 1201 fread(&lf, 1, 1, fin) != 1) 1202 break; 1203 1204 if (cr != '\r' || lf != '\n') { 1205 warnx("Invalid chunked encoding"); 1206 free(header); 1207 return -1; 1208 } 1209 } 1210 free(header); 1211 1212 if (ferror(fin)) 1213 warnx("Error while reading from socket: %s", sockerror(tls)); 1214 else 1215 warnx("Invalid chunked encoding: short read"); 1216 1217 return -1; 1218 } 1219 1220 /* 1221 * Abort a http retrieval 1222 */ 1223 static void 1224 aborthttp(int signo) 1225 { 1226 const char errmsg[] = "\nfetch aborted.\n"; 1227 1228 write(fileno(ttyout), errmsg, sizeof(errmsg) - 1); 1229 longjmp(httpabort, 1); 1230 } 1231 1232 /* 1233 * Retrieve multiple files from the command line, transferring 1234 * files of the form "host:path", "ftp://host/path" using the 1235 * ftp protocol, and files of the form "http://host/path" using 1236 * the http protocol. 1237 * If path has a trailing "/", then return (-1); 1238 * the path will be cd-ed into and the connection remains open, 1239 * and the function will return -1 (to indicate the connection 1240 * is alive). 1241 * If an error occurs the return value will be the offset+1 in 1242 * argv[] of the file that caused a problem (i.e, argv[x] 1243 * returns x+1) 1244 * Otherwise, 0 is returned if all files retrieved successfully. 1245 */ 1246 int 1247 auto_fetch(int argc, char *argv[], char *outfile) 1248 { 1249 char *xargv[5]; 1250 char *cp, *url, *host, *dir, *file, *portnum; 1251 char *username, *pass, *pathstart; 1252 char *ftpproxy, *httpproxy; 1253 int rval, xargc, lastfile; 1254 volatile int argpos; 1255 int dirhasglob, filehasglob, oautologin; 1256 char rempath[PATH_MAX]; 1257 1258 argpos = 0; 1259 1260 if (setjmp(toplevel)) { 1261 if (connected) 1262 disconnect(0, NULL); 1263 return (argpos + 1); 1264 } 1265 (void)signal(SIGINT, (sig_t)intr); 1266 (void)signal(SIGPIPE, (sig_t)lostpeer); 1267 1268 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 1269 ftpproxy = NULL; 1270 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 1271 httpproxy = NULL; 1272 1273 /* 1274 * Loop through as long as there's files to fetch. 1275 */ 1276 username = pass = NULL; 1277 for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) { 1278 if (strchr(argv[argpos], ':') == NULL) 1279 break; 1280 1281 free(username); 1282 free(pass); 1283 host = dir = file = portnum = username = pass = NULL; 1284 1285 lastfile = (argv[argpos+1] == NULL); 1286 1287 /* 1288 * We muck with the string, so we make a copy. 1289 */ 1290 url = strdup(argv[argpos]); 1291 if (url == NULL) 1292 errx(1, "Can't allocate memory for auto-fetch."); 1293 1294 if (strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 1295 if (file_get(url + sizeof(FILE_URL) - 1, outfile) == -1) 1296 rval = argpos + 1; 1297 continue; 1298 } 1299 1300 /* 1301 * Try HTTP URL-style arguments next. 1302 */ 1303 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1304 strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0) { 1305 redirect_loop = 0; 1306 retried = 0; 1307 if (url_get(url, httpproxy, outfile, lastfile) == -1) 1308 rval = argpos + 1; 1309 continue; 1310 } 1311 1312 /* 1313 * Try FTP URL-style arguments next. If ftpproxy is 1314 * set, use url_get() instead of standard ftp. 1315 * Finally, try host:file. 1316 */ 1317 host = url; 1318 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1319 char *passend, *passagain, *userend; 1320 1321 if (ftpproxy) { 1322 if (url_get(url, ftpproxy, outfile, lastfile) == -1) 1323 rval = argpos + 1; 1324 continue; 1325 } 1326 host += sizeof(FTP_URL) - 1; 1327 dir = strchr(host, '/'); 1328 1329 /* Look for [user:pass@]host[:port] */ 1330 1331 /* check if we have "user:pass@" */ 1332 userend = strchr(host, ':'); 1333 passend = strchr(host, '@'); 1334 if (passend && userend && userend < passend && 1335 (!dir || passend < dir)) { 1336 username = host; 1337 pass = userend + 1; 1338 host = passend + 1; 1339 *userend = *passend = '\0'; 1340 passagain = strchr(host, '@'); 1341 if (strchr(pass, '@') != NULL || 1342 (passagain != NULL && passagain < dir)) { 1343 warnx(at_encoding_warning); 1344 username = pass = NULL; 1345 goto bad_ftp_url; 1346 } 1347 1348 if (EMPTYSTRING(username)) { 1349 bad_ftp_url: 1350 warnx("Invalid URL: %s", argv[argpos]); 1351 rval = argpos + 1; 1352 username = pass = NULL; 1353 continue; 1354 } 1355 username = urldecode(username); 1356 pass = urldecode(pass); 1357 } 1358 1359 /* check [host]:port, or [host] */ 1360 if (host[0] == '[') { 1361 cp = strchr(host, ']'); 1362 if (cp && (!dir || cp < dir)) { 1363 if (cp + 1 == dir || cp[1] == ':') { 1364 host++; 1365 *cp++ = '\0'; 1366 } else 1367 cp = NULL; 1368 } else 1369 cp = host; 1370 } else 1371 cp = host; 1372 1373 /* split off host[:port] if there is */ 1374 if (cp) { 1375 portnum = strchr(cp, ':'); 1376 pathstart = strchr(cp, '/'); 1377 /* : in path is not a port # indicator */ 1378 if (portnum && pathstart && 1379 pathstart < portnum) 1380 portnum = NULL; 1381 1382 if (!portnum) 1383 ; 1384 else { 1385 if (!dir) 1386 ; 1387 else if (portnum + 1 < dir) { 1388 *portnum++ = '\0'; 1389 /* 1390 * XXX should check if portnum 1391 * is decimal number 1392 */ 1393 } else { 1394 /* empty portnum */ 1395 goto bad_ftp_url; 1396 } 1397 } 1398 } else 1399 portnum = NULL; 1400 } else { /* classic style `host:file' */ 1401 dir = strchr(host, ':'); 1402 } 1403 if (EMPTYSTRING(host)) { 1404 rval = argpos + 1; 1405 continue; 1406 } 1407 1408 /* 1409 * If dir is NULL, the file wasn't specified 1410 * (URL looked something like ftp://host) 1411 */ 1412 if (dir != NULL) 1413 *dir++ = '\0'; 1414 1415 /* 1416 * Extract the file and (if present) directory name. 1417 */ 1418 if (!EMPTYSTRING(dir)) { 1419 cp = strrchr(dir, '/'); 1420 if (cp != NULL) { 1421 *cp++ = '\0'; 1422 file = cp; 1423 } else { 1424 file = dir; 1425 dir = NULL; 1426 } 1427 } 1428 #ifndef SMALL 1429 if (debug) 1430 fprintf(ttyout, 1431 "user %s:%s host %s port %s dir %s file %s\n", 1432 username, pass ? "XXXX" : NULL, host, portnum, 1433 dir, file); 1434 #endif /* !SMALL */ 1435 1436 /* 1437 * Set up the connection. 1438 */ 1439 if (connected) 1440 disconnect(0, NULL); 1441 xargv[0] = __progname; 1442 xargv[1] = host; 1443 xargv[2] = NULL; 1444 xargc = 2; 1445 if (!EMPTYSTRING(portnum)) { 1446 xargv[2] = portnum; 1447 xargv[3] = NULL; 1448 xargc = 3; 1449 } 1450 oautologin = autologin; 1451 if (username == NULL) 1452 anonftp = 1; 1453 else { 1454 anonftp = 0; 1455 autologin = 0; 1456 } 1457 setpeer(xargc, xargv); 1458 autologin = oautologin; 1459 if (connected == 0 || 1460 (connected == 1 && autologin && (username == NULL || 1461 !ftp_login(host, username, pass)))) { 1462 warnx("Can't connect or login to host `%s'", host); 1463 rval = argpos + 1; 1464 continue; 1465 } 1466 1467 /* Always use binary transfers. */ 1468 setbinary(0, NULL); 1469 1470 dirhasglob = filehasglob = 0; 1471 if (doglob) { 1472 if (!EMPTYSTRING(dir) && 1473 strpbrk(dir, "*?[]{}") != NULL) 1474 dirhasglob = 1; 1475 if (!EMPTYSTRING(file) && 1476 strpbrk(file, "*?[]{}") != NULL) 1477 filehasglob = 1; 1478 } 1479 1480 /* Change directories, if necessary. */ 1481 if (!EMPTYSTRING(dir) && !dirhasglob) { 1482 xargv[0] = "cd"; 1483 xargv[1] = dir; 1484 xargv[2] = NULL; 1485 cd(2, xargv); 1486 if (!dirchange) { 1487 rval = argpos + 1; 1488 continue; 1489 } 1490 } 1491 1492 if (EMPTYSTRING(file)) { 1493 #ifndef SMALL 1494 rval = -1; 1495 #else /* !SMALL */ 1496 recvrequest("NLST", "-", NULL, "w", 0, 0); 1497 rval = 0; 1498 #endif /* !SMALL */ 1499 continue; 1500 } 1501 1502 if (verbose) 1503 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 1504 1505 if (dirhasglob) { 1506 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1507 file = rempath; 1508 } 1509 1510 /* Fetch the file(s). */ 1511 xargc = 2; 1512 xargv[0] = "get"; 1513 xargv[1] = file; 1514 xargv[2] = NULL; 1515 if (dirhasglob || filehasglob) { 1516 int ointeractive; 1517 1518 ointeractive = interactive; 1519 interactive = 0; 1520 xargv[0] = "mget"; 1521 #ifndef SMALL 1522 if (resume) { 1523 xargc = 3; 1524 xargv[1] = "-c"; 1525 xargv[2] = file; 1526 xargv[3] = NULL; 1527 } 1528 #endif /* !SMALL */ 1529 mget(xargc, xargv); 1530 interactive = ointeractive; 1531 } else { 1532 if (outfile != NULL) { 1533 xargv[2] = outfile; 1534 xargv[3] = NULL; 1535 xargc++; 1536 } 1537 #ifndef SMALL 1538 if (resume) 1539 reget(xargc, xargv); 1540 else 1541 #endif /* !SMALL */ 1542 get(xargc, xargv); 1543 } 1544 1545 if ((code / 100) != COMPLETE) 1546 rval = argpos + 1; 1547 } 1548 if (connected && rval != -1) 1549 disconnect(0, NULL); 1550 return (rval); 1551 } 1552 1553 char * 1554 urldecode(const char *str) 1555 { 1556 char *ret, c; 1557 int i, reallen; 1558 1559 if (str == NULL) 1560 return NULL; 1561 if ((ret = malloc(strlen(str) + 1)) == NULL) 1562 err(1, "Can't allocate memory for URL decoding"); 1563 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 1564 c = str[i]; 1565 if (c == '+') { 1566 *ret = ' '; 1567 continue; 1568 } 1569 1570 /* Cannot use strtol here because next char 1571 * after %xx may be a digit. 1572 */ 1573 if (c == '%' && isxdigit((unsigned char)str[i + 1]) && 1574 isxdigit((unsigned char)str[i + 2])) { 1575 *ret = hextochar(&str[i + 1]); 1576 i += 2; 1577 continue; 1578 } 1579 *ret = c; 1580 } 1581 *ret = '\0'; 1582 1583 return ret - reallen; 1584 } 1585 1586 static char * 1587 recode_credentials(const char *userinfo) 1588 { 1589 char *ui, *creds; 1590 size_t ulen, credsize; 1591 1592 /* url-decode the user and pass */ 1593 ui = urldecode(userinfo); 1594 1595 ulen = strlen(ui); 1596 credsize = (ulen + 2) / 3 * 4 + 1; 1597 creds = malloc(credsize); 1598 if (creds == NULL) 1599 errx(1, "out of memory"); 1600 if (b64_ntop(ui, ulen, creds, credsize) == -1) 1601 errx(1, "error in base64 encoding"); 1602 free(ui); 1603 return (creds); 1604 } 1605 1606 static char 1607 hextochar(const char *str) 1608 { 1609 unsigned char c, ret; 1610 1611 c = str[0]; 1612 ret = c; 1613 if (isalpha(c)) 1614 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1615 else 1616 ret -= '0'; 1617 ret *= 16; 1618 1619 c = str[1]; 1620 ret += c; 1621 if (isalpha(c)) 1622 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1623 else 1624 ret -= '0'; 1625 return ret; 1626 } 1627 1628 int 1629 isurl(const char *p) 1630 { 1631 1632 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 1633 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1634 #ifndef NOSSL 1635 strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 || 1636 #endif /* !NOSSL */ 1637 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 1638 strstr(p, ":/")) 1639 return (1); 1640 return (0); 1641 } 1642 1643 #ifndef SMALL 1644 static int 1645 ftp_printf(FILE *fp, const char *fmt, ...) 1646 { 1647 va_list ap; 1648 int ret; 1649 1650 va_start(ap, fmt); 1651 ret = vfprintf(fp, fmt, ap); 1652 va_end(ap); 1653 1654 if (debug) { 1655 va_start(ap, fmt); 1656 vfprintf(ttyout, fmt, ap); 1657 va_end(ap); 1658 } 1659 1660 return ret; 1661 } 1662 #endif /* !SMALL */ 1663 1664 static void 1665 ftp_close(FILE **fin, struct tls **tls, int *fd) 1666 { 1667 #ifndef NOSSL 1668 int ret; 1669 1670 if (*tls != NULL) { 1671 if (tls_session_fd != -1) 1672 dprintf(STDERR_FILENO, "tls session resumed: %s\n", 1673 tls_conn_session_resumed(*tls) ? "yes" : "no"); 1674 do { 1675 ret = tls_close(*tls); 1676 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1677 tls_free(*tls); 1678 *tls = NULL; 1679 } 1680 if (*fd != -1) { 1681 close(*fd); 1682 *fd = -1; 1683 } 1684 #endif 1685 if (*fin != NULL) { 1686 fclose(*fin); 1687 *fin = NULL; 1688 } 1689 } 1690 1691 static const char * 1692 sockerror(struct tls *tls) 1693 { 1694 int save_errno = errno; 1695 #ifndef NOSSL 1696 if (tls != NULL) { 1697 const char *tlserr = tls_error(tls); 1698 if (tlserr != NULL) 1699 return tlserr; 1700 } 1701 #endif 1702 return strerror(save_errno); 1703 } 1704 1705 #ifndef NOSSL 1706 static int 1707 proxy_connect(int socket, char *host, char *cookie) 1708 { 1709 int l; 1710 char buf[1024]; 1711 char *connstr, *hosttail, *port; 1712 1713 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 1714 (hosttail[1] == '\0' || hosttail[1] == ':')) { 1715 host++; 1716 *hosttail++ = '\0'; 1717 } else 1718 hosttail = host; 1719 1720 port = strrchr(hosttail, ':'); /* find portnum */ 1721 if (port != NULL) 1722 *port++ = '\0'; 1723 if (!port) 1724 port = "443"; 1725 1726 if (cookie) { 1727 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1728 "Host: %s:%s\r\n" 1729 "Proxy-Authorization: Basic %s\r\n%s\r\n\r\n", 1730 host, port, host, port, cookie, HTTP_USER_AGENT); 1731 } else { 1732 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1733 "Host: %s:%s\r\n%s\r\n\r\n", 1734 host, port, host, port, HTTP_USER_AGENT); 1735 } 1736 1737 if (l == -1) 1738 errx(1, "Could not allocate memory to assemble connect string!"); 1739 #ifndef SMALL 1740 if (debug) 1741 printf("%s", connstr); 1742 #endif /* !SMALL */ 1743 if (write(socket, connstr, l) != l) 1744 err(1, "Could not send connect string"); 1745 read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */ 1746 free(connstr); 1747 return(200); 1748 } 1749 1750 static int 1751 stdio_tls_write_wrapper(void *arg, const char *buf, int len) 1752 { 1753 struct tls *tls = arg; 1754 ssize_t ret; 1755 1756 do { 1757 ret = tls_write(tls, buf, len); 1758 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1759 1760 return ret; 1761 } 1762 1763 static int 1764 stdio_tls_read_wrapper(void *arg, char *buf, int len) 1765 { 1766 struct tls *tls = arg; 1767 ssize_t ret; 1768 1769 do { 1770 ret = tls_read(tls, buf, len); 1771 } while (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT); 1772 1773 return ret; 1774 } 1775 #endif /* !NOSSL */ 1776