1 /* $OpenBSD: fetch.c,v 1.147 2016/05/27 15:16:16 jsing 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 = tls_client()) == NULL) { 608 fprintf(ttyout, "failed to create SSL client\n"); 609 goto cleanup_url_get; 610 } 611 if (tls_configure(tls, tls_config) != 0) { 612 fprintf(ttyout, "SSL configuration failure: %s\n", 613 tls_error(tls)); 614 goto cleanup_url_get; 615 } 616 if (tls_connect_socket(tls, s, sslhost) != 0) { 617 fprintf(ttyout, "SSL failure: %s\n", tls_error(tls)); 618 goto cleanup_url_get; 619 } 620 } else { 621 fin = fdopen(s, "r+"); 622 } 623 #else /* !SMALL */ 624 fin = fdopen(s, "r+"); 625 #endif /* !SMALL */ 626 627 if (verbose) 628 fprintf(ttyout, "Requesting %s", origline); 629 630 /* 631 * Construct and send the request. Proxy requests don't want leading /. 632 */ 633 #ifndef SMALL 634 cookie_get(host, path, ishttpsurl, &buf); 635 #endif /* !SMALL */ 636 637 epath = url_encode(path); 638 if (proxyurl) { 639 if (verbose) 640 fprintf(ttyout, " (via %s)\n", proxyurl); 641 /* 642 * Host: directive must use the destination host address for 643 * the original URI (path). 644 */ 645 if (credentials) 646 ftp_printf(fin, tls, "GET %s HTTP/1.0\r\n" 647 "Proxy-Authorization: Basic %s\r\n" 648 "Host: %s\r\n%s%s\r\n\r\n", 649 epath, credentials, 650 proxyhost, buf ? buf : "", httpuseragent); 651 else 652 ftp_printf(fin, tls, "GET %s HTTP/1.0\r\n" 653 "Host: %s\r\n%s%s\r\n\r\n", 654 epath, proxyhost, buf ? buf : "", httpuseragent); 655 } else { 656 #ifndef SMALL 657 if (resume) { 658 struct stat stbuf; 659 660 if (stat(savefile, &stbuf) == 0) 661 restart_point = stbuf.st_size; 662 else 663 restart_point = 0; 664 } 665 if (credentials) { 666 ftp_printf(fin, tls, 667 "GET /%s %s\r\nAuthorization: Basic %s\r\nHost: ", 668 epath, restart_point ? 669 "HTTP/1.1\r\nConnection: close" : "HTTP/1.0", 670 credentials); 671 free(credentials); 672 credentials = NULL; 673 } else 674 #endif /* SMALL */ 675 ftp_printf(fin, tls, "GET /%s %s\r\nHost: ", epath, 676 #ifndef SMALL 677 restart_point ? "HTTP/1.1\r\nConnection: close" : 678 #endif /* !SMALL */ 679 "HTTP/1.0"); 680 if (proxyhost) { 681 ftp_printf(fin, tls, "%s", proxyhost); 682 port = NULL; 683 } else if (strchr(host, ':')) { 684 /* 685 * strip off scoped address portion, since it's 686 * local to node 687 */ 688 h = strdup(host); 689 if (h == NULL) 690 errx(1, "Can't allocate memory."); 691 if ((p = strchr(h, '%')) != NULL) 692 *p = '\0'; 693 ftp_printf(fin, tls, "[%s]", h); 694 free(h); 695 } else 696 ftp_printf(fin, tls, "%s", host); 697 698 /* 699 * Send port number only if it's specified and does not equal 700 * 80. Some broken HTTP servers get confused if you explicitly 701 * send them the port number. 702 */ 703 #ifndef SMALL 704 if (port && strcmp(port, (ishttpsurl ? "443" : "80")) != 0) 705 ftp_printf(fin, tls, ":%s", port); 706 if (restart_point) 707 ftp_printf(fin, tls, "\r\nRange: bytes=%lld-", 708 (long long)restart_point); 709 #else /* !SMALL */ 710 if (port && strcmp(port, "80") != 0) 711 ftp_printf(fin, tls, ":%s", port); 712 #endif /* !SMALL */ 713 ftp_printf(fin, tls, "\r\n%s%s\r\n\r\n", 714 buf ? buf : "", httpuseragent); 715 if (verbose) 716 fprintf(ttyout, "\n"); 717 } 718 free(epath); 719 720 #ifndef SMALL 721 free(buf); 722 #endif /* !SMALL */ 723 buf = NULL; 724 725 if (fin != NULL && fflush(fin) == EOF) { 726 warn("Writing HTTP request"); 727 goto cleanup_url_get; 728 } 729 if ((buf = ftp_readline(fin, tls, &len)) == NULL) { 730 warn("Receiving HTTP reply"); 731 goto cleanup_url_get; 732 } 733 734 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 735 buf[--len] = '\0'; 736 #ifndef SMALL 737 if (debug) 738 fprintf(ttyout, "received '%s'\n", buf); 739 #endif /* !SMALL */ 740 741 cp = strchr(buf, ' '); 742 if (cp == NULL) 743 goto improper; 744 else 745 cp++; 746 747 strlcpy(ststr, cp, sizeof(ststr)); 748 status = strtonum(ststr, 200, 416, &errstr); 749 if (errstr) { 750 warnx("Error retrieving file: %s", cp); 751 goto cleanup_url_get; 752 } 753 754 switch (status) { 755 case 200: /* OK */ 756 #ifndef SMALL 757 /* 758 * When we request a partial file, and we receive an HTTP 200 759 * it is a good indication that the server doesn't support 760 * range requests, and is about to send us the entire file. 761 * If the restart_point == 0, then we are not actually 762 * requesting a partial file, and an HTTP 200 is appropriate. 763 */ 764 if (resume && restart_point != 0) { 765 warnx("Server does not support resume."); 766 restart_point = resume = 0; 767 } 768 /* FALLTHROUGH */ 769 case 206: /* Partial Content */ 770 #endif /* !SMALL */ 771 break; 772 case 301: /* Moved Permanently */ 773 case 302: /* Found */ 774 case 303: /* See Other */ 775 case 307: /* Temporary Redirect */ 776 isredirect++; 777 if (redirect_loop++ > 10) { 778 warnx("Too many redirections requested"); 779 goto cleanup_url_get; 780 } 781 break; 782 #ifndef SMALL 783 case 416: /* Requested Range Not Satisfiable */ 784 warnx("File is already fully retrieved."); 785 goto cleanup_url_get; 786 #endif /* !SMALL */ 787 default: 788 warnx("Error retrieving file: %s", cp); 789 goto cleanup_url_get; 790 } 791 792 /* 793 * Read the rest of the header. 794 */ 795 free(buf); 796 filesize = -1; 797 798 for (;;) { 799 if ((buf = ftp_readline(fin, tls, &len)) == NULL) { 800 warn("Receiving HTTP reply"); 801 goto cleanup_url_get; 802 } 803 804 while (len > 0 && (buf[len-1] == '\r' || buf[len-1] == '\n')) 805 buf[--len] = '\0'; 806 if (len == 0) 807 break; 808 #ifndef SMALL 809 if (debug) 810 fprintf(ttyout, "received '%s'\n", buf); 811 #endif /* !SMALL */ 812 813 /* Look for some headers */ 814 cp = buf; 815 #define CONTENTLEN "Content-Length: " 816 if (strncasecmp(cp, CONTENTLEN, sizeof(CONTENTLEN) - 1) == 0) { 817 size_t s; 818 cp += sizeof(CONTENTLEN) - 1; 819 if ((s = strcspn(cp, " \t"))) 820 *(cp+s) = 0; 821 filesize = strtonum(cp, 0, LLONG_MAX, &errstr); 822 if (errstr != NULL) 823 goto improper; 824 #ifndef SMALL 825 if (restart_point) 826 filesize += restart_point; 827 #endif /* !SMALL */ 828 #define LOCATION "Location: " 829 } else if (isredirect && 830 strncasecmp(cp, LOCATION, sizeof(LOCATION) - 1) == 0) { 831 cp += sizeof(LOCATION) - 1; 832 /* 833 * If there is a colon before the first slash, this URI 834 * is not relative. RFC 3986 4.2 835 */ 836 if (cp[strcspn(cp, ":/")] != ':') { 837 #ifdef SMALL 838 errx(1, "Relative redirect not supported"); 839 #else /* SMALL */ 840 /* XXX doesn't handle protocol-relative URIs */ 841 if (*cp == '/') { 842 locbase = NULL; 843 cp++; 844 } else { 845 locbase = strdup(path); 846 if (locbase == NULL) 847 errx(1, "Can't allocate memory" 848 " for location base"); 849 loctail = strchr(locbase, '#'); 850 if (loctail != NULL) 851 *loctail = '\0'; 852 loctail = strchr(locbase, '?'); 853 if (loctail != NULL) 854 *loctail = '\0'; 855 loctail = strrchr(locbase, '/'); 856 if (loctail == NULL) { 857 free(locbase); 858 locbase = NULL; 859 } else 860 loctail[1] = '\0'; 861 } 862 /* Contruct URL from relative redirect */ 863 if (asprintf(&redirurl, "%s%s%s%s/%s%s", 864 scheme, full_host, 865 portnum ? ":" : "", 866 portnum ? portnum : "", 867 locbase ? locbase : "", 868 cp) == -1) 869 errx(1, "Cannot build " 870 "redirect URL"); 871 free(locbase); 872 #endif /* SMALL */ 873 } else if ((redirurl = strdup(cp)) == NULL) 874 errx(1, "Cannot allocate memory for URL"); 875 loctail = strchr(redirurl, '#'); 876 if (loctail != NULL) 877 *loctail = '\0'; 878 if (verbose) 879 fprintf(ttyout, "Redirected to %s\n", redirurl); 880 if (fin != NULL) 881 fclose(fin); 882 else if (s != -1) 883 close(s); 884 rval = url_get(redirurl, proxyenv, savefile); 885 free(redirurl); 886 goto cleanup_url_get; 887 } 888 free(buf); 889 } 890 891 /* Open the output file. */ 892 if (!pipeout) { 893 #ifndef SMALL 894 if (resume) 895 out = open(savefile, O_CREAT | O_WRONLY | O_APPEND, 896 0666); 897 else 898 #endif /* !SMALL */ 899 out = open(savefile, O_CREAT | O_WRONLY | O_TRUNC, 900 0666); 901 if (out < 0) { 902 warn("Can't open %s", savefile); 903 goto cleanup_url_get; 904 } 905 } else 906 out = fileno(stdout); 907 908 /* Trap signals */ 909 oldintr = NULL; 910 oldinti = NULL; 911 if (setjmp(httpabort)) { 912 if (oldintr) 913 (void)signal(SIGINT, oldintr); 914 if (oldinti) 915 (void)signal(SIGINFO, oldinti); 916 goto cleanup_url_get; 917 } 918 oldintr = signal(SIGINT, aborthttp); 919 920 bytes = 0; 921 hashbytes = mark; 922 progressmeter(-1, path); 923 924 free(buf); 925 926 /* Finally, suck down the file. */ 927 if ((buf = malloc(buflen)) == NULL) 928 errx(1, "Can't allocate memory for transfer buffer"); 929 i = 0; 930 len = 1; 931 oldinti = signal(SIGINFO, psummary); 932 while (len > 0) { 933 len = ftp_read(fin, tls, buf, buflen); 934 bytes += len; 935 for (cp = buf, wlen = len; wlen > 0; wlen -= i, cp += i) { 936 if ((i = write(out, cp, wlen)) == -1) { 937 warn("Writing %s", savefile); 938 signal(SIGINFO, oldinti); 939 goto cleanup_url_get; 940 } 941 else if (i == 0) 942 break; 943 } 944 if (hash && !progress) { 945 while (bytes >= hashbytes) { 946 (void)putc('#', ttyout); 947 hashbytes += mark; 948 } 949 (void)fflush(ttyout); 950 } 951 } 952 signal(SIGINFO, oldinti); 953 if (hash && !progress && bytes > 0) { 954 if (bytes < mark) 955 (void)putc('#', ttyout); 956 (void)putc('\n', ttyout); 957 (void)fflush(ttyout); 958 } 959 if (len != 0) { 960 warn("Reading from socket"); 961 goto cleanup_url_get; 962 } 963 progressmeter(1, NULL); 964 if ( 965 #ifndef SMALL 966 !resume && 967 #endif /* !SMALL */ 968 filesize != -1 && len == 0 && bytes != filesize) { 969 if (verbose) 970 fputs("Read short file.\n", ttyout); 971 goto cleanup_url_get; 972 } 973 974 if (verbose) 975 ptransfer(0); 976 (void)signal(SIGINT, oldintr); 977 978 rval = 0; 979 goto cleanup_url_get; 980 981 noftpautologin: 982 warnx( 983 "Auto-login using ftp URLs isn't supported when using $ftp_proxy"); 984 goto cleanup_url_get; 985 986 improper: 987 warnx("Improper response from %s", host); 988 989 cleanup_url_get: 990 #ifndef SMALL 991 if (tls != NULL) { 992 tls_close(tls); 993 tls_free(tls); 994 } 995 free(full_host); 996 free(sslhost); 997 #endif /* !SMALL */ 998 if (fin != NULL) 999 fclose(fin); 1000 else if (s != -1) 1001 close(s); 1002 free(buf); 1003 free(proxyhost); 1004 free(proxyurl); 1005 free(newline); 1006 free(credentials); 1007 return (rval); 1008 } 1009 1010 /* 1011 * Abort a http retrieval 1012 */ 1013 /* ARGSUSED */ 1014 void 1015 aborthttp(int signo) 1016 { 1017 1018 alarmtimer(0); 1019 fputs("\nhttp fetch aborted.\n", ttyout); 1020 (void)fflush(ttyout); 1021 longjmp(httpabort, 1); 1022 } 1023 1024 /* 1025 * Abort a http retrieval 1026 */ 1027 /* ARGSUSED */ 1028 void 1029 abortfile(int signo) 1030 { 1031 1032 alarmtimer(0); 1033 fputs("\nfile fetch aborted.\n", ttyout); 1034 (void)fflush(ttyout); 1035 longjmp(httpabort, 1); 1036 } 1037 1038 /* 1039 * Retrieve multiple files from the command line, transferring 1040 * files of the form "host:path", "ftp://host/path" using the 1041 * ftp protocol, and files of the form "http://host/path" using 1042 * the http protocol. 1043 * If path has a trailing "/", then return (-1); 1044 * the path will be cd-ed into and the connection remains open, 1045 * and the function will return -1 (to indicate the connection 1046 * is alive). 1047 * If an error occurs the return value will be the offset+1 in 1048 * argv[] of the file that caused a problem (i.e, argv[x] 1049 * returns x+1) 1050 * Otherwise, 0 is returned if all files retrieved successfully. 1051 */ 1052 int 1053 auto_fetch(int argc, char *argv[], char *outfile) 1054 { 1055 char *xargv[5]; 1056 char *cp, *url, *host, *dir, *file, *portnum; 1057 char *username, *pass, *pathstart; 1058 char *ftpproxy, *httpproxy; 1059 int rval, xargc; 1060 volatile int argpos; 1061 int dirhasglob, filehasglob, oautologin; 1062 char rempath[PATH_MAX]; 1063 1064 argpos = 0; 1065 1066 if (setjmp(toplevel)) { 1067 if (connected) 1068 disconnect(0, NULL); 1069 return (argpos + 1); 1070 } 1071 (void)signal(SIGINT, (sig_t)intr); 1072 (void)signal(SIGPIPE, (sig_t)lostpeer); 1073 1074 if ((ftpproxy = getenv(FTP_PROXY)) != NULL && *ftpproxy == '\0') 1075 ftpproxy = NULL; 1076 if ((httpproxy = getenv(HTTP_PROXY)) != NULL && *httpproxy == '\0') 1077 httpproxy = NULL; 1078 1079 /* 1080 * Loop through as long as there's files to fetch. 1081 */ 1082 username = pass = NULL; 1083 for (rval = 0; (rval == 0) && (argpos < argc); free(url), argpos++) { 1084 if (strchr(argv[argpos], ':') == NULL) 1085 break; 1086 1087 free(username); 1088 free(pass); 1089 host = dir = file = portnum = username = pass = NULL; 1090 1091 /* 1092 * We muck with the string, so we make a copy. 1093 */ 1094 url = strdup(argv[argpos]); 1095 if (url == NULL) 1096 errx(1, "Can't allocate memory for auto-fetch."); 1097 1098 /* 1099 * Try HTTP URL-style arguments first. 1100 */ 1101 if (strncasecmp(url, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1102 #ifndef SMALL 1103 /* even if we compiled without SSL, url_get will check */ 1104 strncasecmp(url, HTTPS_URL, sizeof(HTTPS_URL) -1) == 0 || 1105 #endif /* !SMALL */ 1106 strncasecmp(url, FILE_URL, sizeof(FILE_URL) - 1) == 0) { 1107 redirect_loop = 0; 1108 if (url_get(url, httpproxy, outfile) == -1) 1109 rval = argpos + 1; 1110 continue; 1111 } 1112 1113 /* 1114 * Try FTP URL-style arguments next. If ftpproxy is 1115 * set, use url_get() instead of standard ftp. 1116 * Finally, try host:file. 1117 */ 1118 host = url; 1119 if (strncasecmp(url, FTP_URL, sizeof(FTP_URL) - 1) == 0) { 1120 char *passend, *passagain, *userend; 1121 1122 if (ftpproxy) { 1123 if (url_get(url, ftpproxy, outfile) == -1) 1124 rval = argpos + 1; 1125 continue; 1126 } 1127 host += sizeof(FTP_URL) - 1; 1128 dir = strchr(host, '/'); 1129 1130 /* Look for [user:pass@]host[:port] */ 1131 1132 /* check if we have "user:pass@" */ 1133 userend = strchr(host, ':'); 1134 passend = strchr(host, '@'); 1135 if (passend && userend && userend < passend && 1136 (!dir || passend < dir)) { 1137 username = host; 1138 pass = userend + 1; 1139 host = passend + 1; 1140 *userend = *passend = '\0'; 1141 passagain = strchr(host, '@'); 1142 if (strchr(pass, '@') != NULL || 1143 (passagain != NULL && passagain < dir)) { 1144 warnx(at_encoding_warning); 1145 username = pass = NULL; 1146 goto bad_ftp_url; 1147 } 1148 1149 if (EMPTYSTRING(username)) { 1150 bad_ftp_url: 1151 warnx("Invalid URL: %s", argv[argpos]); 1152 rval = argpos + 1; 1153 username = pass = NULL; 1154 continue; 1155 } 1156 username = urldecode(username); 1157 pass = urldecode(pass); 1158 } 1159 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 1174 /* split off host[:port] if there is */ 1175 if (cp) { 1176 portnum = strchr(cp, ':'); 1177 pathstart = strchr(cp, '/'); 1178 /* : in path is not a port # indicator */ 1179 if (portnum && pathstart && 1180 pathstart < portnum) 1181 portnum = NULL; 1182 1183 if (!portnum) 1184 ; 1185 else { 1186 if (!dir) 1187 ; 1188 else if (portnum + 1 < dir) { 1189 *portnum++ = '\0'; 1190 /* 1191 * XXX should check if portnum 1192 * is decimal number 1193 */ 1194 } else { 1195 /* empty portnum */ 1196 goto bad_ftp_url; 1197 } 1198 } 1199 } else 1200 portnum = NULL; 1201 } else { /* classic style `host:file' */ 1202 dir = strchr(host, ':'); 1203 } 1204 if (EMPTYSTRING(host)) { 1205 rval = argpos + 1; 1206 continue; 1207 } 1208 1209 /* 1210 * If dir is NULL, the file wasn't specified 1211 * (URL looked something like ftp://host) 1212 */ 1213 if (dir != NULL) 1214 *dir++ = '\0'; 1215 1216 /* 1217 * Extract the file and (if present) directory name. 1218 */ 1219 if (!EMPTYSTRING(dir)) { 1220 cp = strrchr(dir, '/'); 1221 if (cp != NULL) { 1222 *cp++ = '\0'; 1223 file = cp; 1224 } else { 1225 file = dir; 1226 dir = NULL; 1227 } 1228 } 1229 #ifndef SMALL 1230 if (debug) 1231 fprintf(ttyout, 1232 "user %s:%s host %s port %s dir %s file %s\n", 1233 username, pass ? "XXXX" : NULL, host, portnum, 1234 dir, file); 1235 #endif /* !SMALL */ 1236 1237 /* 1238 * Set up the connection. 1239 */ 1240 if (connected) 1241 disconnect(0, NULL); 1242 xargv[0] = __progname; 1243 xargv[1] = host; 1244 xargv[2] = NULL; 1245 xargc = 2; 1246 if (!EMPTYSTRING(portnum)) { 1247 xargv[2] = portnum; 1248 xargv[3] = NULL; 1249 xargc = 3; 1250 } 1251 oautologin = autologin; 1252 if (username == NULL) 1253 anonftp = 1; 1254 else { 1255 anonftp = 0; 1256 autologin = 0; 1257 } 1258 setpeer(xargc, xargv); 1259 autologin = oautologin; 1260 if (connected == 0 || 1261 (connected == 1 && autologin && (username == NULL || 1262 !ftp_login(host, username, pass)))) { 1263 warnx("Can't connect or login to host `%s'", host); 1264 rval = argpos + 1; 1265 continue; 1266 } 1267 1268 /* Always use binary transfers. */ 1269 setbinary(0, NULL); 1270 1271 dirhasglob = filehasglob = 0; 1272 if (doglob) { 1273 if (!EMPTYSTRING(dir) && 1274 strpbrk(dir, "*?[]{}") != NULL) 1275 dirhasglob = 1; 1276 if (!EMPTYSTRING(file) && 1277 strpbrk(file, "*?[]{}") != NULL) 1278 filehasglob = 1; 1279 } 1280 1281 /* Change directories, if necessary. */ 1282 if (!EMPTYSTRING(dir) && !dirhasglob) { 1283 xargv[0] = "cd"; 1284 xargv[1] = dir; 1285 xargv[2] = NULL; 1286 cd(2, xargv); 1287 if (!dirchange) { 1288 rval = argpos + 1; 1289 continue; 1290 } 1291 } 1292 1293 if (EMPTYSTRING(file)) { 1294 #ifndef SMALL 1295 rval = -1; 1296 #else /* !SMALL */ 1297 recvrequest("NLST", "-", NULL, "w", 0, 0); 1298 rval = 0; 1299 #endif /* !SMALL */ 1300 continue; 1301 } 1302 1303 if (verbose) 1304 fprintf(ttyout, "Retrieving %s/%s\n", dir ? dir : "", file); 1305 1306 if (dirhasglob) { 1307 snprintf(rempath, sizeof(rempath), "%s/%s", dir, file); 1308 file = rempath; 1309 } 1310 1311 /* Fetch the file(s). */ 1312 xargc = 2; 1313 xargv[0] = "get"; 1314 xargv[1] = file; 1315 xargv[2] = NULL; 1316 if (dirhasglob || filehasglob) { 1317 int ointeractive; 1318 1319 ointeractive = interactive; 1320 interactive = 0; 1321 xargv[0] = "mget"; 1322 #ifndef SMALL 1323 if (resume) { 1324 xargc = 3; 1325 xargv[1] = "-c"; 1326 xargv[2] = file; 1327 xargv[3] = NULL; 1328 } 1329 #endif /* !SMALL */ 1330 mget(xargc, xargv); 1331 interactive = ointeractive; 1332 } else { 1333 if (outfile != NULL) { 1334 xargv[2] = outfile; 1335 xargv[3] = NULL; 1336 xargc++; 1337 } 1338 #ifndef SMALL 1339 if (resume) 1340 reget(xargc, xargv); 1341 else 1342 #endif /* !SMALL */ 1343 get(xargc, xargv); 1344 } 1345 1346 if ((code / 100) != COMPLETE) 1347 rval = argpos + 1; 1348 } 1349 if (connected && rval != -1) 1350 disconnect(0, NULL); 1351 return (rval); 1352 } 1353 1354 char * 1355 urldecode(const char *str) 1356 { 1357 char *ret, c; 1358 int i, reallen; 1359 1360 if (str == NULL) 1361 return NULL; 1362 if ((ret = malloc(strlen(str)+1)) == NULL) 1363 err(1, "Can't allocate memory for URL decoding"); 1364 for (i = 0, reallen = 0; str[i] != '\0'; i++, reallen++, ret++) { 1365 c = str[i]; 1366 if (c == '+') { 1367 *ret = ' '; 1368 continue; 1369 } 1370 1371 /* Cannot use strtol here because next char 1372 * after %xx may be a digit. 1373 */ 1374 if (c == '%' && isxdigit((unsigned char)str[i+1]) && 1375 isxdigit((unsigned char)str[i+2])) { 1376 *ret = hextochar(&str[i+1]); 1377 i+=2; 1378 continue; 1379 } 1380 *ret = c; 1381 } 1382 *ret = '\0'; 1383 1384 return ret-reallen; 1385 } 1386 1387 char * 1388 recode_credentials(const char *userinfo) 1389 { 1390 char *ui, *creds; 1391 size_t ulen, credsize; 1392 1393 /* url-decode the user and pass */ 1394 ui = urldecode(userinfo); 1395 1396 ulen = strlen(ui); 1397 credsize = (ulen + 2) / 3 * 4 + 1; 1398 creds = malloc(credsize); 1399 if (creds == NULL) 1400 errx(1, "out of memory"); 1401 if (b64_ntop(ui, ulen, creds, credsize) == -1) 1402 errx(1, "error in base64 encoding"); 1403 free(ui); 1404 return (creds); 1405 } 1406 1407 char 1408 hextochar(const char *str) 1409 { 1410 unsigned char c, ret; 1411 1412 c = str[0]; 1413 ret = c; 1414 if (isalpha(c)) 1415 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1416 else 1417 ret -= '0'; 1418 ret *= 16; 1419 1420 c = str[1]; 1421 ret += c; 1422 if (isalpha(c)) 1423 ret -= isupper(c) ? 'A' - 10 : 'a' - 10; 1424 else 1425 ret -= '0'; 1426 return ret; 1427 } 1428 1429 int 1430 isurl(const char *p) 1431 { 1432 1433 if (strncasecmp(p, FTP_URL, sizeof(FTP_URL) - 1) == 0 || 1434 strncasecmp(p, HTTP_URL, sizeof(HTTP_URL) - 1) == 0 || 1435 #ifndef SMALL 1436 strncasecmp(p, HTTPS_URL, sizeof(HTTPS_URL) - 1) == 0 || 1437 #endif /* !SMALL */ 1438 strncasecmp(p, FILE_URL, sizeof(FILE_URL) - 1) == 0 || 1439 strstr(p, ":/")) 1440 return (1); 1441 return (0); 1442 } 1443 1444 char * 1445 ftp_readline(FILE *fp, struct tls *tls, size_t *lenp) 1446 { 1447 if (fp != NULL) 1448 return fparseln(fp, lenp, NULL, "\0\0\0", 0); 1449 #ifndef SMALL 1450 else if (tls != NULL) 1451 return SSL_readline(tls, lenp); 1452 #endif /* !SMALL */ 1453 else 1454 return NULL; 1455 } 1456 1457 size_t 1458 ftp_read(FILE *fp, struct tls *tls, char *buf, size_t len) 1459 { 1460 ssize_t tls_ret; 1461 size_t ret = 0; 1462 1463 if (fp != NULL) 1464 ret = fread(buf, sizeof(char), len, fp); 1465 #ifndef SMALL 1466 else if (tls != NULL) { 1467 if ((tls_ret = tls_read(tls, buf, len)) >= 0) 1468 ret = (size_t)tls_ret; 1469 } 1470 #endif /* !SMALL */ 1471 return (ret); 1472 } 1473 1474 int 1475 ftp_printf(FILE *fp, struct tls *tls, const char *fmt, ...) 1476 { 1477 int ret; 1478 va_list ap; 1479 1480 va_start(ap, fmt); 1481 1482 if (fp != NULL) 1483 ret = vfprintf(fp, fmt, ap); 1484 #ifndef SMALL 1485 else if (tls != NULL) 1486 ret = SSL_vprintf(tls, fmt, ap); 1487 #endif /* !SMALL */ 1488 else 1489 ret = 0; 1490 1491 va_end(ap); 1492 #ifndef SMALL 1493 if (debug) { 1494 va_start(ap, fmt); 1495 ret = vfprintf(ttyout, fmt, ap); 1496 va_end(ap); 1497 } 1498 #endif /* !SMALL */ 1499 return (ret); 1500 } 1501 1502 #ifndef SMALL 1503 int 1504 SSL_vprintf(struct tls *tls, const char *fmt, va_list ap) 1505 { 1506 char *string, *buf; 1507 size_t len; 1508 int ret; 1509 1510 if ((ret = vasprintf(&string, fmt, ap)) == -1) 1511 return ret; 1512 buf = string; 1513 len = ret; 1514 while (len > 0) { 1515 ret = tls_write(tls, buf, len); 1516 if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) 1517 continue; 1518 if (ret < 0) 1519 break; 1520 buf += ret; 1521 len -= ret; 1522 } 1523 free(string); 1524 return ret; 1525 } 1526 1527 char * 1528 SSL_readline(struct tls *tls, size_t *lenp) 1529 { 1530 size_t i, len; 1531 char *buf, *q, c; 1532 int ret; 1533 1534 len = 128; 1535 if ((buf = malloc(len)) == NULL) 1536 errx(1, "Can't allocate memory for transfer buffer"); 1537 for (i = 0; ; i++) { 1538 if (i >= len - 1) { 1539 if ((q = reallocarray(buf, len, 2)) == NULL) 1540 errx(1, "Can't expand transfer buffer"); 1541 buf = q; 1542 len *= 2; 1543 } 1544 again: 1545 ret = tls_read(tls, &c, 1); 1546 if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) 1547 goto again; 1548 if (ret < 0) 1549 errx(1, "SSL read error: %s", tls_error(tls)); 1550 1551 buf[i] = c; 1552 if (c == '\n') { 1553 buf[i] = '\0'; 1554 break; 1555 } 1556 } 1557 *lenp = i; 1558 return (buf); 1559 } 1560 1561 int 1562 proxy_connect(int socket, char *host, char *cookie) 1563 { 1564 int l; 1565 char buf[1024]; 1566 char *connstr, *hosttail, *port; 1567 1568 if (*host == '[' && (hosttail = strrchr(host, ']')) != NULL && 1569 (hosttail[1] == '\0' || hosttail[1] == ':')) { 1570 host++; 1571 *hosttail++ = '\0'; 1572 } else 1573 hosttail = host; 1574 1575 port = strrchr(hosttail, ':'); /* find portnum */ 1576 if (port != NULL) 1577 *port++ = '\0'; 1578 if (!port) 1579 port = "443"; 1580 1581 if (cookie) { 1582 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n" 1583 "Proxy-Authorization: Basic %s\r\n%s\r\n\r\n", 1584 host, port, cookie, HTTP_USER_AGENT); 1585 } else { 1586 l = asprintf(&connstr, "CONNECT %s:%s HTTP/1.1\r\n%s\r\n\r\n", 1587 host, port, HTTP_USER_AGENT); 1588 } 1589 1590 if (l == -1) 1591 errx(1, "Could not allocate memory to assemble connect string!"); 1592 #ifndef SMALL 1593 if (debug) 1594 printf("%s", connstr); 1595 #endif /* !SMALL */ 1596 if (write(socket, connstr, l) != l) 1597 err(1, "Could not send connect string"); 1598 read(socket, &buf, sizeof(buf)); /* only proxy header XXX: error handling? */ 1599 free(connstr); 1600 return(200); 1601 } 1602 #endif /* !SMALL */ 1603