1 /* $OpenBSD: fetch.c,v 1.139 2015/07/18 21:50:47 bluhm Exp $ */ 2 /* $NetBSD: fetch.c,v 1.14 1997/08/18 10:20:20 lukem Exp $ */ 3 4 /*- 5 * Copyright (c) 1997 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Jason Thorpe and Luke Mewburn. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * FTP User Program -- Command line file retrieval 35 */ 36 37 #include <sys/types.h> 38 #include <sys/socket.h> 39 #include <sys/stat.h> 40 41 #include <netinet/in.h> 42 43 #include <arpa/ftp.h> 44 #include <arpa/inet.h> 45 46 #include <ctype.h> 47 #include <err.h> 48 #include <libgen.h> 49 #include <netdb.h> 50 #include <fcntl.h> 51 #include <signal.h> 52 #include <stdio.h> 53 #include <stdarg.h> 54 #include <errno.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <unistd.h> 58 #include <util.h> 59 #include <resolv.h> 60 61 #ifndef SMALL 62 #include <tls.h> 63 #else /* !SMALL */ 64 struct tls; 65 #endif /* !SMALL */ 66 67 #include "ftp_var.h" 68 #include "cmds.h" 69 70 static int url_get(const char *, const char *, const char *); 71 void aborthttp(int); 72 void abortfile(int); 73 char hextochar(const char *); 74 char *urldecode(const char *); 75 char *recode_credentials(const char *_userinfo); 76 int ftp_printf(FILE *, struct tls *, const char *, ...) __attribute__((format(printf, 3, 4))); 77 char *ftp_readline(FILE *, struct tls *, size_t *); 78 size_t ftp_read(FILE *, struct tls *, char *, size_t); 79 #ifndef SMALL 80 int proxy_connect(int, char *, char *); 81 int SSL_vprintf(struct tls *, const char *, va_list); 82 char *SSL_readline(struct tls *, size_t *); 83 #endif /* !SMALL */ 84 85 #define FTP_URL "ftp://" /* ftp URL prefix */ 86 #define HTTP_URL "http://" /* http URL prefix */ 87 #define HTTPS_URL "https://" /* https URL prefix */ 88 #define FILE_URL "file:" /* file URL prefix */ 89 #define FTP_PROXY "ftp_proxy" /* env var with ftp proxy location */ 90 #define HTTP_PROXY "http_proxy" /* env var with http proxy location */ 91 92 #define EMPTYSTRING(x) ((x) == NULL || (*(x) == '\0')) 93 94 static const char at_encoding_warning[] = 95 "Extra `@' characters in usernames and passwords should be encoded as %%40"; 96 97 jmp_buf httpabort; 98 99 static int redirect_loop; 100 101 /* 102 * Determine whether the character needs encoding, per RFC1738: 103 * - No corresponding graphic US-ASCII. 104 * - Unsafe characters. 105 */ 106 static int 107 unsafe_char(const char *c0) 108 { 109 const char *unsafe_chars = " <>\"#{}|\\^~[]`"; 110 const unsigned char *c = (const unsigned char *)c0; 111 112 /* 113 * No corresponding graphic US-ASCII. 114 * Control characters and octets not used in US-ASCII. 115 */ 116 return (iscntrl(*c) || !isascii(*c) || 117 118 /* 119 * Unsafe characters. 120 * '%' is also unsafe, if is not followed by two 121 * hexadecimal digits. 122 */ 123 strchr(unsafe_chars, *c) != NULL || 124 (*c == '%' && (!isxdigit(*++c) || !isxdigit(*++c)))); 125 } 126 127 /* 128 * Encode given URL, per RFC1738. 129 * Allocate and return string to the caller. 130 */ 131 static char * 132 url_encode(const char *path) 133 { 134 size_t i, length, new_length; 135 char *epath, *epathp; 136 137 length = new_length = strlen(path); 138 139 /* 140 * First pass: 141 * Count unsafe characters, and determine length of the 142 * final URL. 143 */ 144 for (i = 0; i < length; i++) 145 if (unsafe_char(path + i)) 146 new_length += 2; 147 148 epath = epathp = malloc(new_length + 1); /* One more for '\0'. */ 149 if (epath == NULL) 150 err(1, "Can't allocate memory for URL encoding"); 151 152 /* 153 * Second pass: 154 * Encode, and copy final URL. 155 */ 156 for (i = 0; i < length; i++) 157 if (unsafe_char(path + i)) { 158 snprintf(epathp, 4, "%%" "%02x", 159 (unsigned char)path[i]); 160 epathp += 3; 161 } else 162 *(epathp++) = path[i]; 163 164 *epathp = '\0'; 165 return (epath); 166 } 167 168 /* 169 * Retrieve URL, via the proxy in $proxyvar if necessary. 170 * Modifies the string argument given. 171 * Returns -1 on failure, 0 on success 172 */ 173 static int 174 url_get(const char *origline, const char *proxyenv, const char *outfile) 175 { 176 char pbuf[NI_MAXSERV], hbuf[NI_MAXHOST], *cp, *portnum, *path, ststr[4]; 177 char *hosttail, *cause = "unknown", *newline, *host, *port, *buf = NULL; 178 char *epath, *redirurl, *loctail, *h, *p; 179 int error, i, isftpurl = 0, isfileurl = 0, isredirect = 0, rval = -1; 180 struct addrinfo hints, *res0, *res, *ares = NULL; 181 const char * volatile savefile; 182 char * volatile proxyurl = NULL; 183 char *credentials = NULL; 184 volatile int s = -1, out; 185 volatile sig_t oldintr, oldinti; 186 FILE *fin = NULL; 187 off_t hashbytes; 188 const char *errstr; 189 ssize_t len, wlen; 190 char *proxyhost = NULL; 191 #ifndef SMALL 192 char *sslpath = NULL, *sslhost = NULL; 193 char *locbase, *full_host = NULL; 194 const char *scheme; 195 int ishttpurl = 0, ishttpsurl = 0; 196 #endif /* !SMALL */ 197 struct tls *tls = NULL; 198 int status; 199 int save_errno; 200 const size_t buflen = 128 * 1024; 201 202 direction = "received"; 203 204 newline = strdup(origline); 205 if (newline == NULL) 206 errx(1, "Can't allocate memory to parse URL"); 207 if (strncasecmp(newline, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) { 208 host = newline + sizeof(HTTP_URL) - 1; 209 #ifndef SMALL 210 ishttpurl = 1; 211 scheme = HTTP_URL; 212 #endif /* !SMALL */ 213 } else if (strncasecmp(newline, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 214 host = newline + sizeof(FTP_URL) - 1; 215 isftpurl = 1; 216 #ifndef SMALL 217 scheme = FTP_URL; 218 #endif /* !SMALL */ 219 } else if (strncasecmp(newline, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 220 host = newline + sizeof(FILE_URL) - 1; 221 isfileurl = 1; 222 #ifndef SMALL 223 scheme = FILE_URL; 224 } else if (strncasecmp(newline, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0) { 225 host = newline + sizeof(HTTPS_URL) - 1; 226 ishttpsurl = 1; 227 scheme = HTTPS_URL; 228 #endif /* !SMALL */ 229 } else 230 errx(1, "url_get: Invalid URL '%s'", newline); 231 232 if (isfileurl) { 233 path = host; 234 } else { 235 path = strchr(host, '/'); /* Find path */ 236 if (EMPTYSTRING(path)) { 237 if (outfile) { /* No slash, but */ 238 path=strchr(host,'\0'); /* we have outfile. */ 239 goto noslash; 240 } 241 if (isftpurl) 242 goto noftpautologin; 243 warnx("No `/' after host (use -o): %s", origline); 244 goto cleanup_url_get; 245 } 246 *path++ = '\0'; 247 if (EMPTYSTRING(path) && !outfile) { 248 if (isftpurl) 249 goto noftpautologin; 250 warnx("No filename after host (use -o): %s", origline); 251 goto cleanup_url_get; 252 } 253 } 254 255 noslash: 256 257 #ifndef SMALL 258 /* 259 * Look for auth header in host, since now host does not 260 * contain the path. Basic auth from RFC 2617, valid 261 * characters for path are in RFC 3986 section 3.3. 262 */ 263 if (proxyenv == NULL && (ishttpurl || ishttpsurl)) { 264 if ((p = strchr(host, '@')) != NULL) { 265 *p = '\0'; 266 credentials = recode_credentials(host); 267 host = p + 1; 268 } 269 } 270 #endif /* SMALL */ 271 272 if (outfile) 273 savefile = outfile; 274 else { 275 if (path[strlen(path) - 1] == '/') /* Consider no file */ 276 savefile = NULL; /* after dir invalid. */ 277 else 278 savefile = basename(path); 279 } 280 281 if (EMPTYSTRING(savefile)) { 282 if (isftpurl) 283 goto noftpautologin; 284 warnx("No filename after directory (use -o): %s", origline); 285 goto cleanup_url_get; 286 } 287 288 #ifndef SMALL 289 if (resume && pipeout) { 290 warnx("can't append to stdout"); 291 goto cleanup_url_get; 292 } 293 #endif /* !SMALL */ 294 295 if (!isfileurl && proxyenv != NULL) { /* use proxy */ 296 #ifndef SMALL 297 if (ishttpsurl) { 298 sslpath = strdup(path); 299 sslhost = strdup(host); 300 if (! sslpath || ! sslhost) 301 errx(1, "Can't allocate memory for https path/host."); 302 } 303 #endif /* !SMALL */ 304 proxyhost = strdup(host); 305 if (proxyhost == NULL) 306 errx(1, "Can't allocate memory for proxy host."); 307 proxyurl = strdup(proxyenv); 308 if (proxyurl == NULL) 309 errx(1, "Can't allocate memory for proxy URL."); 310 if (strncasecmp(proxyurl, HTTP_URL, sizeof(HTTP_URL) - 1) == 0) 311 host = proxyurl + sizeof(HTTP_URL) - 1; 312 else if (strncasecmp(proxyurl, FTP_URL, sizeof(FTP_URL) - 1) == 0) 313 host = proxyurl + sizeof(FTP_URL) - 1; 314 else { 315 warnx("Malformed proxy URL: %s", proxyenv); 316 goto cleanup_url_get; 317 } 318 if (EMPTYSTRING(host)) { 319 warnx("Malformed proxy URL: %s", proxyenv); 320 goto cleanup_url_get; 321 } 322 if (*--path == '\0') 323 *path = '/'; /* add / back to real path */ 324 path = strchr(host, '/'); /* remove trailing / on host */ 325 if (!EMPTYSTRING(path)) 326 *path++ = '\0'; /* i guess this ++ is useless */ 327 328 path = strchr(host, '@'); /* look for credentials in proxy */ 329 if (!EMPTYSTRING(path)) { 330 *path = '\0'; 331 if (strchr(host, ':') == NULL) { 332 warnx("Malformed proxy URL: %s", proxyenv); 333 goto cleanup_url_get; 334 } 335 credentials = recode_credentials(host); 336 *path = '@'; /* restore @ in proxyurl */ 337 338 /* 339 * This removes the password from proxyurl, 340 * filling with stars 341 */ 342 for (host = 1 + strchr(proxyurl + 5, ':'); *host != '@'; 343 host++) 344 *host = '*'; 345 346 host = path + 1; 347 } 348 349 path = newline; 350 } 351 352 if (isfileurl) { 353 struct stat st; 354 355 s = open(path, O_RDONLY); 356 if (s == -1) { 357 warn("Can't open file %s", path); 358 goto cleanup_url_get; 359 } 360 361 if (fstat(s, &st) == -1) 362 filesize = -1; 363 else 364 filesize = st.st_size; 365 366 /* Open the output file. */ 367 if (!pipeout) { 368 #ifndef SMALL 369 if (resume) 370 out = open(savefile, O_CREAT | O_WRONLY | 371 O_APPEND, 0666); 372 373 else 374 #endif /* !SMALL */ 375 out = open(savefile, O_CREAT | O_WRONLY | 376 O_TRUNC, 0666); 377 if (out < 0) { 378 warn("Can't open %s", savefile); 379 goto cleanup_url_get; 380 } 381 } else 382 out = fileno(stdout); 383 384 #ifndef SMALL 385 if (resume) { 386 if (fstat(out, &st) == -1) { 387 warn("Can't fstat %s", savefile); 388 goto cleanup_url_get; 389 } 390 if (lseek(s, st.st_size, SEEK_SET) == -1) { 391 warn("Can't lseek %s", path); 392 goto cleanup_url_get; 393 } 394 restart_point = st.st_size; 395 } 396 #endif /* !SMALL */ 397 398 /* Trap signals */ 399 oldintr = NULL; 400 oldinti = NULL; 401 if (setjmp(httpabort)) { 402 if (oldintr) 403 (void)signal(SIGINT, oldintr); 404 if (oldinti) 405 (void)signal(SIGINFO, oldinti); 406 goto cleanup_url_get; 407 } 408 oldintr = signal(SIGINT, abortfile); 409 410 bytes = 0; 411 hashbytes = mark; 412 progressmeter(-1, path); 413 414 if ((buf = malloc(buflen)) == NULL) 415 errx(1, "Can't allocate memory for transfer buffer"); 416 417 /* Finally, suck down the file. */ 418 i = 0; 419 oldinti = signal(SIGINFO, psummary); 420 while ((len = read(s, buf, buflen)) > 0) { 421 bytes += len; 422 for (cp = buf; len > 0; len -= i, cp += i) { 423 if ((i = write(out, cp, len)) == -1) { 424 warn("Writing %s", savefile); 425 signal(SIGINFO, oldinti); 426 goto cleanup_url_get; 427 } 428 else if (i == 0) 429 break; 430 } 431 if (hash && !progress) { 432 while (bytes >= hashbytes) { 433 (void)putc('#', ttyout); 434 hashbytes += mark; 435 } 436 (void)fflush(ttyout); 437 } 438 } 439 signal(SIGINFO, oldinti); 440 if (hash && !progress && bytes > 0) { 441 if (bytes < mark) 442 (void)putc('#', ttyout); 443 (void)putc('\n', ttyout); 444 (void)fflush(ttyout); 445 } 446 if (len != 0) { 447 warn("Reading from file"); 448 goto cleanup_url_get; 449 } 450 progressmeter(1, NULL); 451 if (verbose) 452 ptransfer(0); 453 (void)signal(SIGINT, oldintr); 454 455 rval = 0; 456 goto cleanup_url_get; 457 } 458 459 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 460 (hosttail[1] == '\0' || hosttail[1] == ':')) { 461 host++; 462 *hosttail++ = '\0'; 463 #ifndef SMALL 464 if (asprintf(&full_host, "[%s]", host) == -1) 465 errx(1, "Cannot allocate memory for hostname"); 466 #endif /* !SMALL */ 467 } else 468 hosttail = host; 469 470 portnum = strrchr(hosttail, ':'); /* find portnum */ 471 if (portnum != NULL) 472 *portnum++ = '\0'; 473 474 #ifndef SMALL 475 if (full_host == NULL) 476 if ((full_host = strdup(host)) == NULL) 477 errx(1, "Cannot allocate memory for hostname"); 478 if (debug) 479 fprintf(ttyout, "host %s, port %s, path %s, " 480 "save as %s, auth %s.\n", 481 host, portnum, path, savefile, credentials); 482 #endif /* !SMALL */ 483 484 memset(&hints, 0, sizeof(hints)); 485 hints.ai_family = family; 486 hints.ai_socktype = SOCK_STREAM; 487 #ifndef SMALL 488 port = portnum ? portnum : (ishttpsurl ? httpsport : httpport); 489 #else /* !SMALL */ 490 port = portnum ? portnum : httpport; 491 #endif /* !SMALL */ 492 error = getaddrinfo(host, port, &hints, &res0); 493 /* 494 * If the services file is corrupt/missing, fall back 495 * on our hard-coded defines. 496 */ 497 if (error == EAI_SERVICE && port == httpport) { 498 snprintf(pbuf, sizeof(pbuf), "%d", HTTP_PORT); 499 error = getaddrinfo(host, pbuf, &hints, &res0); 500 #ifndef SMALL 501 } else if (error == EAI_SERVICE && port == httpsport) { 502 snprintf(pbuf, sizeof(pbuf), "%d", HTTPS_PORT); 503 error = getaddrinfo(host, pbuf, &hints, &res0); 504 #endif /* !SMALL */ 505 } 506 if (error) { 507 warnx("%s: %s", host, gai_strerror(error)); 508 goto cleanup_url_get; 509 } 510 511 #ifndef SMALL 512 if (srcaddr) { 513 hints.ai_flags |= AI_NUMERICHOST; 514 error = getaddrinfo(srcaddr, NULL, &hints, &ares); 515 if (error) { 516 warnx("%s: %s", srcaddr, gai_strerror(error)); 517 goto cleanup_url_get; 518 } 519 } 520 #endif /* !SMALL */ 521 522 /* ensure consistent order of the output */ 523 if (verbose) 524 setvbuf(ttyout, NULL, _IOLBF, 0); 525 526 s = -1; 527 for (res = res0; res; res = res->ai_next) { 528 if (getnameinfo(res->ai_addr, res->ai_addrlen, hbuf, 529 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) 530 strlcpy(hbuf, "(unknown)", sizeof(hbuf)); 531 if (verbose) 532 fprintf(ttyout, "Trying %s...\n", hbuf); 533 534 s = socket(res->ai_family, res->ai_socktype, res->ai_protocol); 535 if (s == -1) { 536 cause = "socket"; 537 continue; 538 } 539 540 #ifndef SMALL 541 if (srcaddr) { 542 if (ares->ai_family != res->ai_family) { 543 close(s); 544 s = -1; 545 errno = EINVAL; 546 cause = "bind"; 547 continue; 548 } 549 if (bind(s, ares->ai_addr, ares->ai_addrlen) < 0) { 550 save_errno = errno; 551 close(s); 552 errno = save_errno; 553 s = -1; 554 cause = "bind"; 555 continue; 556 } 557 } 558 #endif /* !SMALL */ 559 560 again: 561 if (connect(s, res->ai_addr, res->ai_addrlen) < 0) { 562 if (errno == EINTR) 563 goto again; 564 save_errno = errno; 565 close(s); 566 errno = save_errno; 567 s = -1; 568 cause = "connect"; 569 continue; 570 } 571 572 /* get port in numeric */ 573 if (getnameinfo(res->ai_addr, res->ai_addrlen, NULL, 0, 574 pbuf, sizeof(pbuf), NI_NUMERICSERV) == 0) 575 port = pbuf; 576 else 577 port = NULL; 578 579 #ifndef SMALL 580 if (proxyenv && sslhost) 581 proxy_connect(s, sslhost, credentials); 582 #endif /* !SMALL */ 583 break; 584 } 585 freeaddrinfo(res0); 586 #ifndef SMALL 587 if (srcaddr) 588 freeaddrinfo(ares); 589 #endif /* !SMALL */ 590 if (s < 0) { 591 warn("%s", cause); 592 goto cleanup_url_get; 593 } 594 595 #ifndef SMALL 596 if (ishttpsurl) { 597 if (proxyenv && sslpath) { 598 ishttpsurl = 0; 599 proxyurl = NULL; 600 path = sslpath; 601 } 602 if (sslhost == NULL) { 603 sslhost = strdup(host); 604 if (sslhost == NULL) 605 errx(1, "Can't allocate memory for https host."); 606 } 607 if (tls_init() != 0) { 608 fprintf(ttyout, "SSL initialisation failed\n"); 609 goto cleanup_url_get; 610 } 611 if ((tls = tls_client()) == NULL) { 612 fprintf(ttyout, "failed to create SSL client\n"); 613 goto cleanup_url_get; 614 } 615 if (tls_configure(tls, tls_config) != 0) { 616 fprintf(ttyout, "SSL configuration failure: %s\n", 617 tls_error(tls)); 618 goto cleanup_url_get; 619 } 620 if (tls_connect_socket(tls, s, sslhost) != 0) { 621 fprintf(ttyout, "SSL failure: %s\n", tls_error(tls)); 622 goto cleanup_url_get; 623 } 624 } else { 625 fin = fdopen(s, "r+"); 626 } 627 #else /* !SMALL */ 628 fin = fdopen(s, "r+"); 629 #endif /* !SMALL */ 630 631 if (verbose) 632 fprintf(ttyout, "Requesting %s", origline); 633 634 /* 635 * Construct and send the request. Proxy requests don't want leading /. 636 */ 637 #ifndef SMALL 638 cookie_get(host, path, ishttpsurl, &buf); 639 #endif /* !SMALL */ 640 641 epath = url_encode(path); 642 if (proxyurl) { 643 if (verbose) 644 fprintf(ttyout, " (via %s)\n", proxyurl); 645 /* 646 * Host: directive must use the destination host address for 647 * the original URI (path). 648 */ 649 if (credentials) 650 ftp_printf(fin, tls, "GET %s HTTP/1.0\r\n" 651 "Proxy-Authorization: Basic %s\r\n" 652 "Host: %s\r\n%s%s\r\n\r\n", 653 epath, credentials, 654 proxyhost, buf ? buf : "", httpuseragent); 655 else 656 ftp_printf(fin, tls, "GET %s HTTP/1.0\r\n" 657 "Host: %s\r\n%s%s\r\n\r\n", 658 epath, proxyhost, buf ? buf : "", httpuseragent); 659 } else { 660 #ifndef SMALL 661 if (resume) { 662 struct stat stbuf; 663 664 if (stat(savefile, &stbuf) == 0) 665 restart_point = stbuf.st_size; 666 else 667 restart_point = 0; 668 } 669 if (credentials) { 670 ftp_printf(fin, tls, 671 "GET /%s %s\r\nAuthorization: Basic %s\r\nHost: ", 672 epath, restart_point ? 673 "HTTP/1.1\r\nConnection: close" : "HTTP/1.0", 674 credentials); 675 free(credentials); 676 credentials = NULL; 677 } else 678 #endif /* SMALL */ 679 ftp_printf(fin, tls, "GET /%s %s\r\nHost: ", epath, 680 #ifndef SMALL 681 restart_point ? "HTTP/1.1\r\nConnection: close" : 682 #endif /* !SMALL */ 683 "HTTP/1.0"); 684 if (proxyhost) { 685 ftp_printf(fin, tls, "%s", proxyhost); 686 port = NULL; 687 } else if (strchr(host, ':')) { 688 /* 689 * strip off scoped address portion, since it's 690 * local to node 691 */ 692 h = strdup(host); 693 if (h == NULL) 694 errx(1, "Can't allocate memory."); 695 if ((p = strchr(h, '%')) != NULL) 696 *p = '\0'; 697 ftp_printf(fin, tls, "[%s]", h); 698 free(h); 699 } else 700 ftp_printf(fin, tls, "%s", host); 701 702 /* 703 * Send port number only if it's specified and does not equal 704 * 80. Some broken HTTP servers get confused if you explicitly 705 * send them the port number. 706 */ 707 #ifndef SMALL 708 if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0) 709 ftp_printf(fin, tls, ":%s", port); 710 if (restart_point) 711 ftp_printf(fin, tls, "\r\nRange: bytes=%lld-", 712 (long long)restart_point); 713 #else /* !SMALL */ 714 if (port && strcmp(port, "80") != 0) 715 ftp_printf(fin, tls, ":%s", port); 716 #endif /* !SMALL */ 717 ftp_printf(fin, tls, "\r\n%s%s\r\n\r\n", 718 buf ? buf : "", httpuseragent); 719 if (verbose) 720 fprintf(ttyout, "\n"); 721 } 722 free(epath); 723 724 #ifndef SMALL 725 free(buf); 726 #endif /* !SMALL */ 727 buf = NULL; 728 729 if (fin != NULL && fflush(fin) == EOF) { 730 warn("Writing HTTP request"); 731 goto cleanup_url_get; 732 } 733 if ((buf = ftp_readline(fin, tls, &len)) == NULL) { 734 warn("Receiving HTTP reply"); 735 goto cleanup_url_get; 736 } 737 738 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 739 buf[--len] = '\0'; 740 #ifndef SMALL 741 if (debug) 742 fprintf(ttyout, "received '%s'\n", buf); 743 #endif /* !SMALL */ 744 745 cp = strchr(buf, ' '); 746 if (cp == NULL) 747 goto improper; 748 else 749 cp++; 750 751 strlcpy(ststr, cp, sizeof(ststr)); 752 status = strtonum(ststr, 200, 416, &errstr); 753 if (errstr) { 754 warnx("Error retrieving file: %s", cp); 755 goto cleanup_url_get; 756 } 757 758 switch (status) { 759 case 200: /* OK */ 760 #ifndef SMALL 761 /* 762 * When we request a partial file, and we receive an HTTP 200 763 * it is a good indication that the server doesn't support 764 * range requests, and is about to send us the entire file. 765 * If the restart_point == 0, then we are not actually 766 * requesting a partial file, and an HTTP 200 is appropriate. 767 */ 768 if (resume && restart_point != 0) { 769 warnx("Server does not support resume."); 770 restart_point = resume = 0; 771 } 772 /* FALLTHROUGH */ 773 case 206: /* Partial Content */ 774 #endif /* !SMALL */ 775 break; 776 case 301: /* Moved Permanently */ 777 case 302: /* Found */ 778 case 303: /* See Other */ 779 case 307: /* Temporary Redirect */ 780 isredirect++; 781 if (redirect_loop++ > 10) { 782 warnx("Too many redirections requested"); 783 goto cleanup_url_get; 784 } 785 break; 786 #ifndef SMALL 787 case 416: /* Requested Range Not Satisfiable */ 788 warnx("File is already fully retrieved."); 789 goto cleanup_url_get; 790 #endif /* !SMALL */ 791 default: 792 warnx("Error retrieving file: %s", cp); 793 goto cleanup_url_get; 794 } 795 796 /* 797 * Read the rest of the header. 798 */ 799 free(buf); 800 filesize = -1; 801 802 for (;;) { 803 if ((buf = ftp_readline(fin, tls, &len)) == NULL) { 804 warn("Receiving HTTP reply"); 805 goto cleanup_url_get; 806 } 807 808 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 809 buf[--len] = '\0'; 810 if (len == 0) 811 break; 812 #ifndef SMALL 813 if (debug) 814 fprintf(ttyout, "received '%s'\n", buf); 815 #endif /* !SMALL */ 816 817 /* Look for some headers */ 818 cp = buf; 819 #define CONTENTLEN "Content-Length: " 820 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 821 size_t s; 822 cp += sizeof(CONTENTLEN) - 1; 823 if ((s = strcspn(cp, " \t"))) 824 *(cp+s) = 0; 825 filesize = strtonum(cp, 0, LLONG_MAX, &errstr); 826 if (errstr != NULL) 827 goto improper; 828 #ifndef SMALL 829 if (restart_point) 830 filesize += restart_point; 831 #endif /* !SMALL */ 832 #define LOCATION "Location: " 833 } else if (isredirect && 834 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 835 cp += sizeof(LOCATION) - 1; 836 if (strstr(cp, "://") == NULL) { 837 #ifdef SMALL 838 errx(1, "Relative redirect not supported"); 839 #else /* SMALL */ 840 if (*cp == '/') { 841 locbase = NULL; 842 cp++; 843 } else { 844 locbase = strdup(path); 845 if (locbase == NULL) 846 errx(1, "Can't allocate memory" 847 " for location base"); 848 loctail = strchr(locbase, '#'); 849 if (loctail != NULL) 850 *loctail = '\0'; 851 loctail = strchr(locbase, '?'); 852 if (loctail != NULL) 853 *loctail = '\0'; 854 loctail = strrchr(locbase, '/'); 855 if (loctail == NULL) { 856 free(locbase); 857 locbase = NULL; 858 } else 859 loctail[1] = '\0'; 860 } 861 /* Contruct URL from relative redirect */ 862 if (asprintf(&redirurl, "%s%s%s%s/%s%s", 863 scheme, full_host, 864 portnum ? ":" : "", 865 portnum ? portnum : "", 866 locbase ? locbase : "", 867 cp) == -1) 868 errx(1, "Cannot build " 869 "redirect URL"); 870 free(locbase); 871 #endif /* SMALL */ 872 } else if ((redirurl = strdup(cp)) == NULL) 873 errx(1, "Cannot allocate memory for URL"); 874 loctail = strchr(redirurl, '#'); 875 if (loctail != NULL) 876 *loctail = '\0'; 877 if (verbose) 878 fprintf(ttyout, "Redirected to %s\n", redirurl); 879 if (fin != NULL) 880 fclose(fin); 881 else if (s != -1) 882 close(s); 883 rval = url_get(redirurl, proxyenv, savefile); 884 free(redirurl); 885 goto cleanup_url_get; 886 } 887 free(buf); 888 } 889 890 /* Open the output file. */ 891 if (!pipeout) { 892 #ifndef SMALL 893 if (resume) 894 out = open(savefile, O_CREAT | O_WRONLY | O_APPEND, 895 0666); 896 else 897 #endif /* !SMALL */ 898 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 899 0666); 900 if (out < 0) { 901 warn("Can't open %s", savefile); 902 goto cleanup_url_get; 903 } 904 } else 905 out = fileno(stdout); 906 907 /* Trap signals */ 908 oldintr = NULL; 909 oldinti = NULL; 910 if (setjmp(httpabort)) { 911 if (oldintr) 912 (void)signal(SIGINT, oldintr); 913 if (oldinti) 914 (void)signal(SIGINFO, oldinti); 915 goto cleanup_url_get; 916 } 917 oldintr = signal(SIGINT, aborthttp); 918 919 bytes = 0; 920 hashbytes = mark; 921 progressmeter(-1, path); 922 923 free(buf); 924 925 /* Finally, suck down the file. */ 926 if ((buf = malloc(buflen)) == NULL) 927 errx(1, "Can't allocate memory for transfer buffer"); 928 i = 0; 929 len = 1; 930 oldinti = signal(SIGINFO, psummary); 931 while (len > 0) { 932 len = ftp_read(fin, tls, buf, buflen); 933 bytes += len; 934 for (cp = buf, wlen = len; wlen > 0; wlen -= i, cp += i) { 935 if ((i = write(out, cp, wlen)) == -1) { 936 warn("Writing %s", savefile); 937 signal(SIGINFO, oldinti); 938 goto cleanup_url_get; 939 } 940 else if (i == 0) 941 break; 942 } 943 if (hash && !progress) { 944 while (bytes >= hashbytes) { 945 (void)putc('#', ttyout); 946 hashbytes += mark; 947 } 948 (void)fflush(ttyout); 949 } 950 } 951 signal(SIGINFO, oldinti); 952 if (hash && !progress && bytes > 0) { 953 if (bytes < mark) 954 (void)putc('#', ttyout); 955 (void)putc('\n', ttyout); 956 (void)fflush(ttyout); 957 } 958 if (len != 0) { 959 warn("Reading from socket"); 960 goto cleanup_url_get; 961 } 962 progressmeter(1, NULL); 963 if ( 964 #ifndef SMALL 965 !resume && 966 #endif /* !SMALL */ 967 filesize != -1 && len == 0 && bytes != filesize) { 968 if (verbose) 969 fputs("Read short file.\n", ttyout); 970 goto cleanup_url_get; 971 } 972 973 if (verbose) 974 ptransfer(0); 975 (void)signal(SIGINT, oldintr); 976 977 rval = 0; 978 goto cleanup_url_get; 979 980 noftpautologin: 981 warnx( 982 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 983 goto cleanup_url_get; 984 985 improper: 986 warnx("Improper response from %s", host); 987 988 cleanup_url_get: 989 #ifndef SMALL 990 if (tls != NULL) { 991 tls_close(tls); 992 tls_free(tls); 993 } 994 free(full_host); 995 free(sslhost); 996 #endif /* !SMALL */ 997 if (fin != NULL) 998 fclose(fin); 999 else if (s != -1) 1000 close(s); 1001 free(buf); 1002 free(proxyhost); 1003 free(proxyurl); 1004 free(newline); 1005 free(credentials); 1006 return (rval); 1007 } 1008 1009 /* 1010 * Abort a http retrieval 1011 */ 1012 /* ARGSUSED */ 1013 void 1014 aborthttp(int signo) 1015 { 1016 1017 alarmtimer(0); 1018 fputs("\nhttp fetch aborted.\n", ttyout); 1019 (void)fflush(ttyout); 1020 longjmp(httpabort, 1); 1021 } 1022 1023 /* 1024 * Abort a http retrieval 1025 */ 1026 /* ARGSUSED */ 1027 void 1028 abortfile(int signo) 1029 { 1030 1031 alarmtimer(0); 1032 fputs("\nfile fetch aborted.\n", ttyout); 1033 (void)fflush(ttyout); 1034 longjmp(httpabort, 1); 1035 } 1036 1037 /* 1038 * Retrieve multiple files from the command line, transferring 1039 * files of the form "host:path", "ftp://host/path" using the 1040 * ftp protocol, and files of the form "http://host/path" using 1041 * the http protocol. 1042 * If path has a trailing "/", then return (-1); 1043 * the path will be cd-ed into and the connection remains open, 1044 * and the function will return -1 (to indicate the connection 1045 * is alive). 1046 * If an error occurs the return value will be the offset+1 in 1047 * argv[] of the file that caused a problem (i.e, argv[x] 1048 * returns x+1) 1049 * Otherwise, 0 is returned if all files retrieved successfully. 1050 */ 1051 int 1052 auto_fetch(int argc, char *argv[], char *outfile) 1053 { 1054 char *xargv[5]; 1055 char *cp, *url, *host, *dir, *file, *portnum; 1056 char *username, *pass, *pathstart; 1057 char *ftpproxy, *httpproxy; 1058 int rval, xargc; 1059 volatile int argpos; 1060 int dirhasglob, filehasglob, oautologin; 1061 char rempath[PATH_MAX]; 1062 1063 argpos = 0; 1064 1065 if (setjmp(toplevel)) { 1066 if (connected) 1067 disconnect(0, NULL); 1068 return (argpos + 1); 1069 } 1070 (void)signal(SIGINT, (sig_t)intr); 1071 (void)signal(SIGPIPE, (sig_t)lostpeer); 1072 1073 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 1074 ftpproxy = NULL; 1075 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 1076 httpproxy = NULL; 1077 1078 /* 1079 * Loop through as long as there's files to fetch. 1080 */ 1081 username = pass = NULL; 1082 for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) { 1083 if (strchr(argv[argpos], ':') == NULL) 1084 break; 1085 1086 free(username); 1087 free(pass); 1088 host = dir = file = portnum = username = pass = NULL; 1089 1090 /* 1091 * We muck with the string, so we make a copy. 1092 */ 1093 url = strdup(argv[argpos]); 1094 if (url == NULL) 1095 errx(1, "Can't allocate memory for auto-fetch."); 1096 1097 /* 1098 * Try HTTP URL-style arguments first. 1099 */ 1100 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1101 #ifndef SMALL 1102 /* even if we compiled without SSL, url_get will check */ 1103 strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0 || 1104 #endif /* !SMALL */ 1105 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 1106 redirect_loop = 0; 1107 if (url_get(url, httpproxy, outfile) == -1) 1108 rval = argpos + 1; 1109 continue; 1110 } 1111 1112 /* 1113 * Try FTP URL-style arguments next. If ftpproxy is 1114 * set, use url_get() instead of standard ftp. 1115 * Finally, try host:file. 1116 */ 1117 host = url; 1118 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1119 char *passend, *passagain, *userend; 1120 1121 if (ftpproxy) { 1122 if (url_get(url, ftpproxy, outfile) == -1) 1123 rval = argpos + 1; 1124 continue; 1125 } 1126 host += sizeof(FTP_URL) - 1; 1127 dir = strchr(host, '/'); 1128 1129 /* Look for [user:pass@]host[:port] */ 1130 1131 /* check if we have "user:pass@" */ 1132 userend = strchr(host, ':'); 1133 passend = strchr(host, '@'); 1134 if (passend && userend && userend < passend && 1135 (!dir || passend < dir)) { 1136 username = host; 1137 pass = userend + 1; 1138 host = passend + 1; 1139 *userend = *passend = '\0'; 1140 passagain = strchr(host, '@'); 1141 if (strchr(pass, '@') != NULL || 1142 (passagain != NULL && passagain < dir)) { 1143 warnx(at_encoding_warning); 1144 username = pass = NULL; 1145 goto bad_ftp_url; 1146 } 1147 1148 if (EMPTYSTRING(username)) { 1149 bad_ftp_url: 1150 warnx("Invalid URL: %s", argv[argpos]); 1151 rval = argpos + 1; 1152 username = pass = NULL; 1153 continue; 1154 } 1155 username = urldecode(username); 1156 pass = urldecode(pass); 1157 } 1158 1159 #ifdef INET6 1160 /* check [host]:port, or [host] */ 1161 if (host[0] == '[') { 1162 cp = strchr(host, ']'); 1163 if (cp && (!dir || cp < dir)) { 1164 if (cp + 1 == dir || cp[1] == ':') { 1165 host++; 1166 *cp++ = '\0'; 1167 } else 1168 cp = NULL; 1169 } else 1170 cp = host; 1171 } else 1172 cp = host; 1173 #else 1174 cp = host; 1175 #endif 1176 1177 /* split off host[:port] if there is */ 1178 if (cp) { 1179 portnum = strchr(cp, ':'); 1180 pathstart = strchr(cp, '/'); 1181 /* : in path is not a port # indicator */ 1182 if (portnum && pathstart && 1183 pathstart < portnum) 1184 portnum = NULL; 1185 1186 if (!portnum) 1187 ; 1188 else { 1189 if (!dir) 1190 ; 1191 else if (portnum + 1 < dir) { 1192 *portnum++ = '\0'; 1193 /* 1194 * XXX should check if portnum 1195 * is decimal number 1196 */ 1197 } else { 1198 /* empty portnum */ 1199 goto bad_ftp_url; 1200 } 1201 } 1202 } else 1203 portnum = NULL; 1204 } else { /* classic style `host:file' */ 1205 dir = strchr(host, ':'); 1206 } 1207 if (EMPTYSTRING(host)) { 1208 rval = argpos + 1; 1209 continue; 1210 } 1211 1212 /* 1213 * If dir is NULL, the file wasn't specified 1214 * (URL looked something like ftp://host) 1215 */ 1216 if (dir != NULL) 1217 *dir++ = '\0'; 1218 1219 /* 1220 * Extract the file and (if present) directory name. 1221 */ 1222 if (!EMPTYSTRING(dir)) { 1223 cp = strrchr(dir, '/'); 1224 if (cp != NULL) { 1225 *cp++ = '\0'; 1226 file = cp; 1227 } else { 1228 file = dir; 1229 dir = NULL; 1230 } 1231 } 1232 #ifndef SMALL 1233 if (debug) 1234 fprintf(ttyout, 1235 "user %s:%s host %s port %s dir %s file %s\n", 1236 username, pass ? "XXXX" : NULL, host, portnum, 1237 dir, file); 1238 #endif /* !SMALL */ 1239 1240 /* 1241 * Set up the connection. 1242 */ 1243 if (connected) 1244 disconnect(0, NULL); 1245 xargv[0] = __progname; 1246 xargv[1] = host; 1247 xargv[2] = NULL; 1248 xargc = 2; 1249 if (!EMPTYSTRING(portnum)) { 1250 xargv[2] = portnum; 1251 xargv[3] = NULL; 1252 xargc = 3; 1253 } 1254 oautologin = autologin; 1255 if (username == NULL) 1256 anonftp = 1; 1257 else { 1258 anonftp = 0; 1259 autologin = 0; 1260 } 1261 setpeer(xargc, xargv); 1262 autologin = oautologin; 1263 if (connected == 0 || 1264 (connected == 1 && autologin && (username == NULL || 1265 !ftp_login(host, username, pass)))) { 1266 warnx("Can't connect or login to host `%s'", host); 1267 rval = argpos + 1; 1268 continue; 1269 } 1270 1271 /* Always use binary transfers. */ 1272 setbinary(0, NULL); 1273 1274 dirhasglob = filehasglob = 0; 1275 if (doglob) { 1276 if (!EMPTYSTRING(dir) && 1277 strpbrk(dir, "*?[]{}") != NULL) 1278 dirhasglob = 1; 1279 if (!EMPTYSTRING(file) && 1280 strpbrk(file, "*?[]{}") != NULL) 1281 filehasglob = 1; 1282 } 1283 1284 /* Change directories, if necessary. */ 1285 if (!EMPTYSTRING(dir) && !dirhasglob) { 1286 xargv[0] = "cd"; 1287 xargv[1] = dir; 1288 xargv[2] = NULL; 1289 cd(2, xargv); 1290 if (!dirchange) { 1291 rval = argpos + 1; 1292 continue; 1293 } 1294 } 1295 1296 if (EMPTYSTRING(file)) { 1297 #ifndef SMALL 1298 rval = -1; 1299 #else /* !SMALL */ 1300 recvrequest("NLST", "-", NULL, "w", 0, 0); 1301 rval = 0; 1302 #endif /* !SMALL */ 1303 continue; 1304 } 1305 1306 if (verbose) 1307 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 1308 1309 if (dirhasglob) { 1310 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1311 file = rempath; 1312 } 1313 1314 /* Fetch the file(s). */ 1315 xargc = 2; 1316 xargv[0] = "get"; 1317 xargv[1] = file; 1318 xargv[2] = NULL; 1319 if (dirhasglob || filehasglob) { 1320 int ointeractive; 1321 1322 ointeractive = interactive; 1323 interactive = 0; 1324 xargv[0] = "mget"; 1325 #ifndef SMALL 1326 if (resume) { 1327 xargc = 3; 1328 xargv[1] = "-c"; 1329 xargv[2] = file; 1330 xargv[3] = NULL; 1331 } 1332 #endif /* !SMALL */ 1333 mget(xargc, xargv); 1334 interactive = ointeractive; 1335 } else { 1336 if (outfile != NULL) { 1337 xargv[2] = outfile; 1338 xargv[3] = NULL; 1339 xargc++; 1340 } 1341 #ifndef SMALL 1342 if (resume) 1343 reget(xargc, xargv); 1344 else 1345 #endif /* !SMALL */ 1346 get(xargc, xargv); 1347 } 1348 1349 if ((code / 100) != COMPLETE) 1350 rval = argpos + 1; 1351 } 1352 if (connected && rval != -1) 1353 disconnect(0, NULL); 1354 return (rval); 1355 } 1356 1357 char * 1358 urldecode(const char *str) 1359 { 1360 char *ret, c; 1361 int i, reallen; 1362 1363 if (str == NULL) 1364 return NULL; 1365 if ((ret = malloc(strlen(str)+1)) == NULL) 1366 err(1, "Can't allocate memory for URL decoding"); 1367 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 1368 c = str[i]; 1369 if (c == '+') { 1370 *ret = ' '; 1371 continue; 1372 } 1373 1374 /* Cannot use strtol here because next char 1375 * after %xx may be a digit. 1376 */ 1377 if (c == '%' && isxdigit(str[i+1]) && isxdigit(str[i+2])) { 1378 *ret = hextochar(&str[i+1]); 1379 i+=2; 1380 continue; 1381 } 1382 *ret = c; 1383 } 1384 *ret = '\0'; 1385 1386 return ret-reallen; 1387 } 1388 1389 char * 1390 recode_credentials(const char *userinfo) 1391 { 1392 char *ui, *creds; 1393 size_t ulen, credsize; 1394 1395 /* url-decode the user and pass */ 1396 ui = urldecode(userinfo); 1397 1398 ulen = strlen(ui); 1399 credsize = (ulen + 2) / 3 * 4 + 1; 1400 creds = malloc(credsize); 1401 if (creds == NULL) 1402 errx(1, "out of memory"); 1403 if (b64_ntop(ui, ulen, creds, credsize) == -1) 1404 errx(1, "error in base64 encoding"); 1405 free(ui); 1406 return (creds); 1407 } 1408 1409 char 1410 hextochar(const char *str) 1411 { 1412 char c, ret; 1413 1414 c = str[0]; 1415 ret = c; 1416 if (isalpha(c)) 1417 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1418 else 1419 ret -= '0'; 1420 ret *= 16; 1421 1422 c = str[1]; 1423 ret += c; 1424 if (isalpha(c)) 1425 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1426 else 1427 ret -= '0'; 1428 return ret; 1429 } 1430 1431 int 1432 isurl(const char *p) 1433 { 1434 1435 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 1436 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1437 #ifndef SMALL 1438 strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 || 1439 #endif /* !SMALL */ 1440 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 1441 strstr(p, ":/")) 1442 return (1); 1443 return (0); 1444 } 1445 1446 char * 1447 ftp_readline(FILE *fp, struct tls *tls, size_t *lenp) 1448 { 1449 if (fp != NULL) 1450 return fparseln(fp, lenp, NULL, "\0\0\0", 0); 1451 #ifndef SMALL 1452 else if (tls != NULL) 1453 return SSL_readline(tls, lenp); 1454 #endif /* !SMALL */ 1455 else 1456 return NULL; 1457 } 1458 1459 size_t 1460 ftp_read(FILE *fp, struct tls *tls, char *buf, size_t len) 1461 { 1462 size_t ret; 1463 if (fp != NULL) 1464 ret = fread(buf, sizeof(char), len, fp); 1465 #ifndef SMALL 1466 else if (tls!= NULL) { 1467 size_t nr; 1468 1469 if ((ret = tls_read(tls, buf, len, &nr)) != 0) 1470 ret = 0; 1471 else 1472 ret = nr; 1473 } 1474 #endif /* !SMALL */ 1475 else 1476 ret = 0; 1477 return (ret); 1478 } 1479 1480 int 1481 ftp_printf(FILE *fp, struct tls *tls, const char *fmt, ...) 1482 { 1483 int ret; 1484 va_list ap; 1485 1486 va_start(ap, fmt); 1487 1488 if (fp != NULL) 1489 ret = vfprintf(fp, fmt, ap); 1490 #ifndef SMALL 1491 else if (tls != NULL) 1492 ret = SSL_vprintf(tls, fmt, ap); 1493 #endif /* !SMALL */ 1494 else 1495 ret = 0; 1496 1497 va_end(ap); 1498 #ifndef SMALL 1499 if (debug) { 1500 va_start(ap, fmt); 1501 ret = vfprintf(ttyout, fmt, ap); 1502 va_end(ap); 1503 } 1504 #endif /* !SMALL */ 1505 return (ret); 1506 } 1507 1508 #ifndef SMALL 1509 int 1510 SSL_vprintf(struct tls *tls, const char *fmt, va_list ap) 1511 { 1512 char *string, *buf; 1513 size_t nw, len; 1514 int ret; 1515 1516 if ((ret = vasprintf(&string, fmt, ap)) == -1) 1517 return ret; 1518 buf = string; 1519 len = ret; 1520 while (len > 0) { 1521 ret = tls_write(tls, buf, len, &nw); 1522 if (ret == TLS_READ_AGAIN || ret == TLS_WRITE_AGAIN) 1523 continue; 1524 if (ret < 0) 1525 break; 1526 buf += nw; 1527 len -= nw; 1528 } 1529 free(string); 1530 return ret; 1531 } 1532 1533 char * 1534 SSL_readline(struct tls *tls, size_t *lenp) 1535 { 1536 size_t i, len, nr; 1537 char *buf, *q, c; 1538 int ret; 1539 1540 len = 128; 1541 if ((buf = malloc(len)) == NULL) 1542 errx(1, "Can't allocate memory for transfer buffer"); 1543 for (i = 0; ; i++) { 1544 if (i >= len - 1) { 1545 if ((q = reallocarray(buf, len, 2)) == NULL) 1546 errx(1, "Can't expand transfer buffer"); 1547 buf = q; 1548 len *= 2; 1549 } 1550 again: 1551 ret = tls_read(tls, &c, 1, &nr); 1552 if (ret == TLS_READ_AGAIN) 1553 goto again; 1554 if (ret != 0) 1555 errx(1, "SSL read error: %u", ret); 1556 1557 buf[i] = c; 1558 if (c == '\n') 1559 break; 1560 } 1561 *lenp = i; 1562 return (buf); 1563 } 1564 1565 int 1566 proxy_connect(int socket, char *host, char *cookie) 1567 { 1568 int l; 1569 char buf[1024]; 1570 char *connstr, *hosttail, *port; 1571 1572 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 1573 (hosttail[1] == '\0' || hosttail[1] == ':')) { 1574 host++; 1575 *hosttail++ = '\0'; 1576 } else 1577 hosttail = host; 1578 1579 port = strrchr(hosttail, ':'); /* find portnum */ 1580 if (port != NULL) 1581 *port++ = '\0'; 1582 if (!port) 1583 port = "443"; 1584 1585 if (cookie) { 1586 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1587 "Proxy-Authorization: Basic %s\r\n%s\r\n\r\n", 1588 host, port, cookie, HTTP_USER_AGENT); 1589 } else { 1590 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n%s\r\n\r\n", 1591 host, port, HTTP_USER_AGENT); 1592 } 1593 1594 if (l == -1) 1595 errx(1, "Could not allocate memory to assemble connect string!"); 1596 #ifndef SMALL 1597 if (debug) 1598 printf("%s", connstr); 1599 #endif /* !SMALL */ 1600 if (write(socket, connstr, l) != l) 1601 err(1, "Could not send connect string"); 1602 read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */ 1603 free(connstr); 1604 return(200); 1605 } 1606 #endif /* !SMALL */ 1607