http.c revision 294194
137535Sdes/*- 2262560Sdes * Copyright (c) 2000-2014 Dag-Erling Sm��rgrav 337535Sdes * All rights reserved. 437535Sdes * 537535Sdes * Redistribution and use in source and binary forms, with or without 637535Sdes * modification, are permitted provided that the following conditions 737535Sdes * are met: 837535Sdes * 1. Redistributions of source code must retain the above copyright 937535Sdes * notice, this list of conditions and the following disclaimer 1037535Sdes * in this position and unchanged. 1137535Sdes * 2. Redistributions in binary form must reproduce the above copyright 1237535Sdes * notice, this list of conditions and the following disclaimer in the 1337535Sdes * documentation and/or other materials provided with the distribution. 1437535Sdes * 3. The name of the author may not be used to endorse or promote products 1563012Sdes * derived from this software without specific prior written permission. 1637535Sdes * 1737535Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1837535Sdes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1937535Sdes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2037535Sdes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2137535Sdes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2237535Sdes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2337535Sdes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2437535Sdes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2537535Sdes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2637535Sdes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2737535Sdes */ 2837535Sdes 2984203Sdillon#include <sys/cdefs.h> 3084203Sdillon__FBSDID("$FreeBSD: stable/10/lib/libfetch/http.c 294194 2016-01-16 20:24:02Z des $"); 3184203Sdillon 3263236Sdes/* 3363236Sdes * The following copyright applies to the base64 code: 3463236Sdes * 3563236Sdes *- 3663236Sdes * Copyright 1997 Massachusetts Institute of Technology 3763236Sdes * 3863236Sdes * Permission to use, copy, modify, and distribute this software and 3963236Sdes * its documentation for any purpose and without fee is hereby 4063236Sdes * granted, provided that both the above copyright notice and this 4163236Sdes * permission notice appear in all copies, that both the above 4263236Sdes * copyright notice and this permission notice appear in all 4363236Sdes * supporting documentation, and that the name of M.I.T. not be used 4463236Sdes * in advertising or publicity pertaining to distribution of the 4563236Sdes * software without specific, written prior permission. M.I.T. makes 4663236Sdes * no representations about the suitability of this software for any 4763236Sdes * purpose. It is provided "as is" without express or implied 4863236Sdes * warranty. 4990267Sdes * 5063236Sdes * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 5163236Sdes * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 5263236Sdes * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 5363236Sdes * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 5463236Sdes * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5563236Sdes * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 5663236Sdes * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 5763236Sdes * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 5863236Sdes * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 5963236Sdes * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 6063236Sdes * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6163236Sdes * SUCH DAMAGE. 6263236Sdes */ 6363236Sdes 6437535Sdes#include <sys/param.h> 6560737Sume#include <sys/socket.h> 66186124Smurray#include <sys/time.h> 6737535Sdes 6863012Sdes#include <ctype.h> 6937535Sdes#include <err.h> 7063012Sdes#include <errno.h> 7160376Sdes#include <locale.h> 7260189Sdes#include <netdb.h> 7337608Sdes#include <stdarg.h> 7437535Sdes#include <stdio.h> 7537535Sdes#include <stdlib.h> 7637535Sdes#include <string.h> 7760376Sdes#include <time.h> 7837535Sdes#include <unistd.h> 79240496Sdes 80240496Sdes#ifdef WITH_SSL 81240496Sdes#include <openssl/md5.h> 82240496Sdes#define MD5Init(c) MD5_Init(c) 83240496Sdes#define MD5Update(c, data, len) MD5_Update(c, data, len) 84240496Sdes#define MD5Final(md, c) MD5_Final(md, c) 85240496Sdes#else 86202613Sdes#include <md5.h> 87240496Sdes#endif 8837535Sdes 89141958Skbyanc#include <netinet/in.h> 90141958Skbyanc#include <netinet/tcp.h> 91141958Skbyanc 9237535Sdes#include "fetch.h" 9340939Sdes#include "common.h" 9441862Sdes#include "httperr.h" 9537535Sdes 9663012Sdes/* Maximum number of redirects to follow */ 97241839Seadler#define MAX_REDIRECT 20 9837535Sdes 9963012Sdes/* Symbolic names for reply codes we care about */ 10063012Sdes#define HTTP_OK 200 10163012Sdes#define HTTP_PARTIAL 206 10263012Sdes#define HTTP_MOVED_PERM 301 10363012Sdes#define HTTP_MOVED_TEMP 302 10463012Sdes#define HTTP_SEE_OTHER 303 105186124Smurray#define HTTP_NOT_MODIFIED 304 106241841Seadler#define HTTP_USE_PROXY 305 107169386Sdes#define HTTP_TEMP_REDIRECT 307 108241840Seadler#define HTTP_PERM_REDIRECT 308 10963012Sdes#define HTTP_NEED_AUTH 401 11087317Sdes#define HTTP_NEED_PROXY_AUTH 407 111125696Sdes#define HTTP_BAD_RANGE 416 11263012Sdes#define HTTP_PROTOCOL_ERROR 999 11360196Sdes 11463012Sdes#define HTTP_REDIRECT(xyz) ((xyz) == HTTP_MOVED_PERM \ 11590267Sdes || (xyz) == HTTP_MOVED_TEMP \ 116169386Sdes || (xyz) == HTTP_TEMP_REDIRECT \ 117241841Seadler || (xyz) == HTTP_USE_PROXY \ 11890267Sdes || (xyz) == HTTP_SEE_OTHER) 11963012Sdes 12088771Sdes#define HTTP_ERROR(xyz) ((xyz) > 400 && (xyz) < 599) 12163012Sdes 12290267Sdes 12363012Sdes/***************************************************************************** 12463012Sdes * I/O functions for decoding chunked streams 12563012Sdes */ 12663012Sdes 12797859Sdesstruct httpio 12837535Sdes{ 12997858Sdes conn_t *conn; /* connection */ 13097866Sdes int chunked; /* chunked mode */ 13197858Sdes char *buf; /* chunk buffer */ 13297866Sdes size_t bufsize; /* size of chunk buffer */ 133294194Sdes size_t buflen; /* amount of data currently in buffer */ 134294194Sdes size_t bufpos; /* current read offset in buffer */ 13597858Sdes int eof; /* end-of-file flag */ 13697858Sdes int error; /* error flag */ 13797858Sdes size_t chunksize; /* remaining size of current chunk */ 13863281Sdes#ifndef NDEBUG 13990267Sdes size_t total; 14063012Sdes#endif 14137535Sdes}; 14237535Sdes 14337608Sdes/* 14463012Sdes * Get next chunk header 14537608Sdes */ 14637608Sdesstatic int 147174588Sdeshttp_new_chunk(struct httpio *io) 14837608Sdes{ 14990267Sdes char *p; 15090267Sdes 151174588Sdes if (fetch_getln(io->conn) == -1) 15290267Sdes return (-1); 15390267Sdes 154174761Sdes if (io->conn->buflen < 2 || !isxdigit((unsigned char)*io->conn->buf)) 15590267Sdes return (-1); 15690267Sdes 157174761Sdes for (p = io->conn->buf; *p && !isspace((unsigned char)*p); ++p) { 15890267Sdes if (*p == ';') 15990267Sdes break; 160174761Sdes if (!isxdigit((unsigned char)*p)) 16190267Sdes return (-1); 162174761Sdes if (isdigit((unsigned char)*p)) { 16397859Sdes io->chunksize = io->chunksize * 16 + 16490267Sdes *p - '0'; 16590267Sdes } else { 16697859Sdes io->chunksize = io->chunksize * 16 + 167176036Sdes 10 + tolower((unsigned char)*p) - 'a'; 16890267Sdes } 16990267Sdes } 17090267Sdes 17163281Sdes#ifndef NDEBUG 17290267Sdes if (fetchDebug) { 17397859Sdes io->total += io->chunksize; 17497859Sdes if (io->chunksize == 0) 175106207Sdes fprintf(stderr, "%s(): end of last chunk\n", __func__); 17690267Sdes else 177106207Sdes fprintf(stderr, "%s(): new chunk: %lu (%lu)\n", 178106207Sdes __func__, (unsigned long)io->chunksize, 179106207Sdes (unsigned long)io->total); 18090267Sdes } 18163012Sdes#endif 18290267Sdes 18397859Sdes return (io->chunksize); 18437608Sdes} 18537608Sdes 18637608Sdes/* 18797866Sdes * Grow the input buffer to at least len bytes 18897866Sdes */ 18997866Sdesstatic inline int 190174588Sdeshttp_growbuf(struct httpio *io, size_t len) 19197866Sdes{ 19297866Sdes char *tmp; 19397866Sdes 19497866Sdes if (io->bufsize >= len) 19597866Sdes return (0); 19697866Sdes 19797866Sdes if ((tmp = realloc(io->buf, len)) == NULL) 19897866Sdes return (-1); 19997866Sdes io->buf = tmp; 20097866Sdes io->bufsize = len; 201106044Sdes return (0); 20297866Sdes} 20397866Sdes 20497866Sdes/* 20537608Sdes * Fill the input buffer, do chunk decoding on the fly 20637608Sdes */ 207262560Sdesstatic ssize_t 208174588Sdeshttp_fillbuf(struct httpio *io, size_t len) 20937535Sdes{ 210230307Sdes ssize_t nbytes; 211262560Sdes char ch; 212230307Sdes 21397859Sdes if (io->error) 21490267Sdes return (-1); 21597859Sdes if (io->eof) 21690267Sdes return (0); 21790267Sdes 218294194Sdes /* not chunked: just fetch the requested amount */ 21997866Sdes if (io->chunked == 0) { 220174588Sdes if (http_growbuf(io, len) == -1) 22197866Sdes return (-1); 222230307Sdes if ((nbytes = fetch_read(io->conn, io->buf, len)) == -1) { 223230307Sdes io->error = errno; 22497866Sdes return (-1); 225106185Sdes } 226230307Sdes io->buflen = nbytes; 22797866Sdes io->bufpos = 0; 22897866Sdes return (io->buflen); 22997866Sdes } 23097866Sdes 231294194Sdes /* chunked, but we ran out: get the next chunk header */ 23297859Sdes if (io->chunksize == 0) { 233174588Sdes switch (http_new_chunk(io)) { 23490267Sdes case -1: 235262560Sdes io->error = EPROTO; 23690267Sdes return (-1); 23790267Sdes case 0: 23897859Sdes io->eof = 1; 23990267Sdes return (0); 24090267Sdes } 24137535Sdes } 24263012Sdes 243294194Sdes /* fetch the requested amount, but no more than the current chunk */ 24497866Sdes if (len > io->chunksize) 24597866Sdes len = io->chunksize; 246174588Sdes if (http_growbuf(io, len) == -1) 24790267Sdes return (-1); 248230307Sdes if ((nbytes = fetch_read(io->conn, io->buf, len)) == -1) { 249230307Sdes io->error = errno; 25097866Sdes return (-1); 251106185Sdes } 252294194Sdes io->bufpos = 0; 253230307Sdes io->buflen = nbytes; 254294194Sdes io->chunksize -= nbytes; 25590267Sdes 25697859Sdes if (io->chunksize == 0) { 257262560Sdes if (fetch_read(io->conn, &ch, 1) != 1 || ch != '\r' || 258262560Sdes fetch_read(io->conn, &ch, 1) != 1 || ch != '\n') 25990267Sdes return (-1); 26090267Sdes } 26190267Sdes 26297866Sdes return (io->buflen); 26337535Sdes} 26437535Sdes 26537608Sdes/* 26637608Sdes * Read function 26737608Sdes */ 26837535Sdesstatic int 269174588Sdeshttp_readfn(void *v, char *buf, int len) 27037535Sdes{ 27197859Sdes struct httpio *io = (struct httpio *)v; 272262560Sdes int rlen; 27363012Sdes 27497859Sdes if (io->error) 27590267Sdes return (-1); 27697859Sdes if (io->eof) 27790267Sdes return (0); 27863012Sdes 279262560Sdes /* empty buffer */ 280262560Sdes if (!io->buf || io->bufpos == io->buflen) { 281262560Sdes if ((rlen = http_fillbuf(io, len)) < 0) { 282262560Sdes if ((errno = io->error) == EINTR) 283262560Sdes io->error = 0; 284262560Sdes return (-1); 285262560Sdes } else if (rlen == 0) { 286262560Sdes return (0); 287262560Sdes } 28890267Sdes } 28937535Sdes 290262560Sdes rlen = io->buflen - io->bufpos; 291262560Sdes if (len < rlen) 292262560Sdes rlen = len; 293262560Sdes memcpy(buf, io->buf + io->bufpos, rlen); 294262560Sdes io->bufpos += rlen; 295262560Sdes return (rlen); 29637535Sdes} 29737535Sdes 29837608Sdes/* 29937608Sdes * Write function 30037608Sdes */ 30137535Sdesstatic int 302174588Sdeshttp_writefn(void *v, const char *buf, int len) 30337535Sdes{ 30497859Sdes struct httpio *io = (struct httpio *)v; 30590267Sdes 306174588Sdes return (fetch_write(io->conn, buf, len)); 30737535Sdes} 30837535Sdes 30937608Sdes/* 31037608Sdes * Close function 31137608Sdes */ 31237535Sdesstatic int 313174588Sdeshttp_closefn(void *v) 31437535Sdes{ 31597859Sdes struct httpio *io = (struct httpio *)v; 31690267Sdes int r; 31763012Sdes 318174588Sdes r = fetch_close(io->conn); 31997859Sdes if (io->buf) 32097859Sdes free(io->buf); 32197859Sdes free(io); 32290267Sdes return (r); 32337535Sdes} 32437535Sdes 32537608Sdes/* 32663012Sdes * Wrap a file descriptor up 32737608Sdes */ 32863012Sdesstatic FILE * 329174588Sdeshttp_funopen(conn_t *conn, int chunked) 33037535Sdes{ 33197859Sdes struct httpio *io; 33290267Sdes FILE *f; 33363012Sdes 334109967Sdes if ((io = calloc(1, sizeof(*io))) == NULL) { 335174588Sdes fetch_syserr(); 33690267Sdes return (NULL); 33790267Sdes } 33897859Sdes io->conn = conn; 33997866Sdes io->chunked = chunked; 340174588Sdes f = funopen(io, http_readfn, http_writefn, NULL, http_closefn); 34190267Sdes if (f == NULL) { 342174588Sdes fetch_syserr(); 34397859Sdes free(io); 34490267Sdes return (NULL); 34590267Sdes } 34690267Sdes return (f); 34763012Sdes} 34863012Sdes 34990267Sdes 35063012Sdes/***************************************************************************** 35163012Sdes * Helper functions for talking to the server and parsing its replies 35263012Sdes */ 35363012Sdes 35463012Sdes/* Header types */ 35563012Sdestypedef enum { 35690267Sdes hdr_syserror = -2, 35790267Sdes hdr_error = -1, 35890267Sdes hdr_end = 0, 35990267Sdes hdr_unknown = 1, 36090267Sdes hdr_content_length, 36190267Sdes hdr_content_range, 36290267Sdes hdr_last_modified, 36390267Sdes hdr_location, 36490267Sdes hdr_transfer_encoding, 365202613Sdes hdr_www_authenticate, 366202613Sdes hdr_proxy_authenticate, 36785093Sdes} hdr_t; 36863012Sdes 36963012Sdes/* Names of interesting headers */ 37063012Sdesstatic struct { 37190267Sdes hdr_t num; 37290267Sdes const char *name; 37363012Sdes} hdr_names[] = { 37490267Sdes { hdr_content_length, "Content-Length" }, 37590267Sdes { hdr_content_range, "Content-Range" }, 37690267Sdes { hdr_last_modified, "Last-Modified" }, 37790267Sdes { hdr_location, "Location" }, 37890267Sdes { hdr_transfer_encoding, "Transfer-Encoding" }, 37990267Sdes { hdr_www_authenticate, "WWW-Authenticate" }, 380202613Sdes { hdr_proxy_authenticate, "Proxy-Authenticate" }, 38190267Sdes { hdr_unknown, NULL }, 38263012Sdes}; 38363012Sdes 38463012Sdes/* 38563012Sdes * Send a formatted line; optionally echo to terminal 38663012Sdes */ 38763012Sdesstatic int 388174588Sdeshttp_cmd(conn_t *conn, const char *fmt, ...) 38963012Sdes{ 39090267Sdes va_list ap; 39190267Sdes size_t len; 39290267Sdes char *msg; 39390267Sdes int r; 39463012Sdes 39590267Sdes va_start(ap, fmt); 39690267Sdes len = vasprintf(&msg, fmt, ap); 39790267Sdes va_end(ap); 39890267Sdes 39990267Sdes if (msg == NULL) { 40090267Sdes errno = ENOMEM; 401174588Sdes fetch_syserr(); 40290267Sdes return (-1); 40390267Sdes } 40490267Sdes 405174588Sdes r = fetch_putln(conn, msg, len); 40690267Sdes free(msg); 40790267Sdes 40890267Sdes if (r == -1) { 409174588Sdes fetch_syserr(); 41090267Sdes return (-1); 41190267Sdes } 41290267Sdes 41390267Sdes return (0); 41463012Sdes} 41563012Sdes 41663012Sdes/* 41763012Sdes * Get and parse status line 41863012Sdes */ 41963012Sdesstatic int 420174588Sdeshttp_get_reply(conn_t *conn) 42163012Sdes{ 42290267Sdes char *p; 42390267Sdes 424174588Sdes if (fetch_getln(conn) == -1) 42590267Sdes return (-1); 42690267Sdes /* 42790267Sdes * A valid status line looks like "HTTP/m.n xyz reason" where m 42890267Sdes * and n are the major and minor protocol version numbers and xyz 42990267Sdes * is the reply code. 43090267Sdes * Unfortunately, there are servers out there (NCSA 1.5.1, to name 43190267Sdes * just one) that do not send a version number, so we can't rely 43290267Sdes * on finding one, but if we do, insist on it being 1.0 or 1.1. 43390267Sdes * We don't care about the reason phrase. 43490267Sdes */ 43597856Sdes if (strncmp(conn->buf, "HTTP", 4) != 0) 43690267Sdes return (HTTP_PROTOCOL_ERROR); 43797856Sdes p = conn->buf + 4; 43890267Sdes if (*p == '/') { 43990267Sdes if (p[1] != '1' || p[2] != '.' || (p[3] != '0' && p[3] != '1')) 44090267Sdes return (HTTP_PROTOCOL_ERROR); 44190267Sdes p += 4; 44290267Sdes } 443174761Sdes if (*p != ' ' || 444174761Sdes !isdigit((unsigned char)p[1]) || 445174761Sdes !isdigit((unsigned char)p[2]) || 446174761Sdes !isdigit((unsigned char)p[3])) 44790267Sdes return (HTTP_PROTOCOL_ERROR); 44890267Sdes 44997856Sdes conn->err = (p[1] - '0') * 100 + (p[2] - '0') * 10 + (p[3] - '0'); 45097856Sdes return (conn->err); 45137535Sdes} 45237535Sdes 45337608Sdes/* 45490267Sdes * Check a header; if the type matches the given string, return a pointer 45590267Sdes * to the beginning of the value. 45663012Sdes */ 45775891Sarchiestatic const char * 458174588Sdeshttp_match(const char *str, const char *hdr) 45963012Sdes{ 460176036Sdes while (*str && *hdr && 461176036Sdes tolower((unsigned char)*str++) == tolower((unsigned char)*hdr++)) 46290267Sdes /* nothing */; 46390267Sdes if (*str || *hdr != ':') 46490267Sdes return (NULL); 465174761Sdes while (*hdr && isspace((unsigned char)*++hdr)) 46690267Sdes /* nothing */; 46790267Sdes return (hdr); 46863012Sdes} 46963012Sdes 470202613Sdes 47163012Sdes/* 472202613Sdes * Get the next header and return the appropriate symbolic code. We 473202613Sdes * need to read one line ahead for checking for a continuation line 474202613Sdes * belonging to the current header (continuation lines start with 475221821Sdes * white space). 476202613Sdes * 477202613Sdes * We get called with a fresh line already in the conn buffer, either 478202613Sdes * from the previous http_next_header() invocation, or, the first 479202613Sdes * time, from a fetch_getln() performed by our caller. 480202613Sdes * 481202613Sdes * This stops when we encounter an empty line (we dont read beyond the header 482202613Sdes * area). 483221821Sdes * 484202613Sdes * Note that the "headerbuf" is just a place to return the result. Its 485202613Sdes * contents are not used for the next call. This means that no cleanup 486202613Sdes * is needed when ie doing another connection, just call the cleanup when 487202613Sdes * fully done to deallocate memory. 48863012Sdes */ 489202613Sdes 490202613Sdes/* Limit the max number of continuation lines to some reasonable value */ 491202613Sdes#define HTTP_MAX_CONT_LINES 10 492202613Sdes 493202613Sdes/* Place into which to build a header from one or several lines */ 494202613Sdestypedef struct { 495202613Sdes char *buf; /* buffer */ 496202613Sdes size_t bufsize; /* buffer size */ 497202613Sdes size_t buflen; /* length of buffer contents */ 498202613Sdes} http_headerbuf_t; 499202613Sdes 500202613Sdesstatic void 501202613Sdesinit_http_headerbuf(http_headerbuf_t *buf) 50263012Sdes{ 503202613Sdes buf->buf = NULL; 504202613Sdes buf->bufsize = 0; 505202613Sdes buf->buflen = 0; 506202613Sdes} 50790267Sdes 508221821Sdesstatic void 509202613Sdesclean_http_headerbuf(http_headerbuf_t *buf) 510202613Sdes{ 511202613Sdes if (buf->buf) 512202613Sdes free(buf->buf); 513202613Sdes init_http_headerbuf(buf); 514202613Sdes} 515202613Sdes 516202613Sdes/* Remove whitespace at the end of the buffer */ 517221821Sdesstatic void 518202613Sdeshttp_conn_trimright(conn_t *conn) 519202613Sdes{ 520221821Sdes while (conn->buflen && 521202613Sdes isspace((unsigned char)conn->buf[conn->buflen - 1])) 52297856Sdes conn->buflen--; 52397856Sdes conn->buf[conn->buflen] = '\0'; 524202613Sdes} 525202613Sdes 526202613Sdesstatic hdr_t 527202613Sdeshttp_next_header(conn_t *conn, http_headerbuf_t *hbuf, const char **p) 528202613Sdes{ 529221820Sdes unsigned int i, len; 530202613Sdes 531221821Sdes /* 532202613Sdes * Have to do the stripping here because of the first line. So 533221821Sdes * it's done twice for the subsequent lines. No big deal 534202613Sdes */ 535202613Sdes http_conn_trimright(conn); 53697856Sdes if (conn->buflen == 0) 53797856Sdes return (hdr_end); 538202613Sdes 539202613Sdes /* Copy the line to the headerbuf */ 540202613Sdes if (hbuf->bufsize < conn->buflen + 1) { 541202613Sdes if ((hbuf->buf = realloc(hbuf->buf, conn->buflen + 1)) == NULL) 542202613Sdes return (hdr_syserror); 543202613Sdes hbuf->bufsize = conn->buflen + 1; 544202613Sdes } 545202613Sdes strcpy(hbuf->buf, conn->buf); 546202613Sdes hbuf->buflen = conn->buflen; 547202613Sdes 548221821Sdes /* 549202613Sdes * Fetch possible continuation lines. Stop at 1st non-continuation 550221821Sdes * and leave it in the conn buffer 551221821Sdes */ 552202613Sdes for (i = 0; i < HTTP_MAX_CONT_LINES; i++) { 553202613Sdes if (fetch_getln(conn) == -1) 554202613Sdes return (hdr_syserror); 555202613Sdes 556221821Sdes /* 557202613Sdes * Note: we carry on the idea from the previous version 558202613Sdes * that a pure whitespace line is equivalent to an empty 559202613Sdes * one (so it's not continuation and will be handled when 560221821Sdes * we are called next) 561202613Sdes */ 562202613Sdes http_conn_trimright(conn); 563202613Sdes if (conn->buf[0] != ' ' && conn->buf[0] != "\t"[0]) 564202613Sdes break; 565202613Sdes 566202613Sdes /* Got a continuation line. Concatenate to previous */ 567202613Sdes len = hbuf->buflen + conn->buflen; 568202613Sdes if (hbuf->bufsize < len + 1) { 569202613Sdes len *= 2; 570202613Sdes if ((hbuf->buf = realloc(hbuf->buf, len + 1)) == NULL) 571202613Sdes return (hdr_syserror); 572202613Sdes hbuf->bufsize = len + 1; 573202613Sdes } 574202613Sdes strcpy(hbuf->buf + hbuf->buflen, conn->buf); 575202613Sdes hbuf->buflen += conn->buflen; 576221821Sdes } 577202613Sdes 57890267Sdes /* 57990267Sdes * We could check for malformed headers but we don't really care. 58090267Sdes * A valid header starts with a token immediately followed by a 58190267Sdes * colon; a token is any sequence of non-control, non-whitespace 58290267Sdes * characters except "()<>@,;:\\\"{}". 58390267Sdes */ 58490267Sdes for (i = 0; hdr_names[i].num != hdr_unknown; i++) 585202613Sdes if ((*p = http_match(hdr_names[i].name, hbuf->buf)) != NULL) 58690267Sdes return (hdr_names[i].num); 587202613Sdes 58890267Sdes return (hdr_unknown); 58963012Sdes} 59063012Sdes 591202613Sdes/************************** 592202613Sdes * [Proxy-]Authenticate header parsing 593202613Sdes */ 594202613Sdes 595221821Sdes/* 596221821Sdes * Read doublequote-delimited string into output buffer obuf (allocated 597202613Sdes * by caller, whose responsibility it is to ensure that it's big enough) 598202613Sdes * cp points to the first char after the initial '"' 599221821Sdes * Handles \ quoting 600221821Sdes * Returns pointer to the first char after the terminating double quote, or 601202613Sdes * NULL for error. 602202613Sdes */ 603202613Sdesstatic const char * 604202613Sdeshttp_parse_headerstring(const char *cp, char *obuf) 605202613Sdes{ 606202613Sdes for (;;) { 607202613Sdes switch (*cp) { 608202613Sdes case 0: /* Unterminated string */ 609202613Sdes *obuf = 0; 610202613Sdes return (NULL); 611202613Sdes case '"': /* Ending quote */ 612202613Sdes *obuf = 0; 613202613Sdes return (++cp); 614202613Sdes case '\\': 615202613Sdes if (*++cp == 0) { 616202613Sdes *obuf = 0; 617202613Sdes return (NULL); 618202613Sdes } 619202613Sdes /* FALLTHROUGH */ 620202613Sdes default: 621202613Sdes *obuf++ = *cp++; 622202613Sdes } 623202613Sdes } 624202613Sdes} 625202613Sdes 626202613Sdes/* Http auth challenge schemes */ 627202613Sdestypedef enum {HTTPAS_UNKNOWN, HTTPAS_BASIC,HTTPAS_DIGEST} http_auth_schemes_t; 628202613Sdes 629202613Sdes/* Data holder for a Basic or Digest challenge. */ 630202613Sdestypedef struct { 631202613Sdes http_auth_schemes_t scheme; 632202613Sdes char *realm; 633202613Sdes char *qop; 634202613Sdes char *nonce; 635202613Sdes char *opaque; 636202613Sdes char *algo; 637202613Sdes int stale; 638202613Sdes int nc; /* Nonce count */ 639202613Sdes} http_auth_challenge_t; 640202613Sdes 641221821Sdesstatic void 642202613Sdesinit_http_auth_challenge(http_auth_challenge_t *b) 643202613Sdes{ 644202613Sdes b->scheme = HTTPAS_UNKNOWN; 645202613Sdes b->realm = b->qop = b->nonce = b->opaque = b->algo = NULL; 646202613Sdes b->stale = b->nc = 0; 647202613Sdes} 648202613Sdes 649221821Sdesstatic void 650202613Sdesclean_http_auth_challenge(http_auth_challenge_t *b) 651202613Sdes{ 652221821Sdes if (b->realm) 653202613Sdes free(b->realm); 654221821Sdes if (b->qop) 655202613Sdes free(b->qop); 656221821Sdes if (b->nonce) 657202613Sdes free(b->nonce); 658221821Sdes if (b->opaque) 659202613Sdes free(b->opaque); 660221821Sdes if (b->algo) 661202613Sdes free(b->algo); 662202613Sdes init_http_auth_challenge(b); 663202613Sdes} 664202613Sdes 665202613Sdes/* Data holder for an array of challenges offered in an http response. */ 666202613Sdes#define MAX_CHALLENGES 10 667202613Sdestypedef struct { 668202613Sdes http_auth_challenge_t *challenges[MAX_CHALLENGES]; 669202613Sdes int count; /* Number of parsed challenges in the array */ 670202613Sdes int valid; /* We did parse an authenticate header */ 671202613Sdes} http_auth_challenges_t; 672202613Sdes 673221821Sdesstatic void 674202613Sdesinit_http_auth_challenges(http_auth_challenges_t *cs) 675202613Sdes{ 676202613Sdes int i; 677202613Sdes for (i = 0; i < MAX_CHALLENGES; i++) 678202613Sdes cs->challenges[i] = NULL; 679202613Sdes cs->count = cs->valid = 0; 680202613Sdes} 681202613Sdes 682221821Sdesstatic void 683202613Sdesclean_http_auth_challenges(http_auth_challenges_t *cs) 684202613Sdes{ 685202613Sdes int i; 686202613Sdes /* We rely on non-zero pointers being allocated, not on the count */ 687202613Sdes for (i = 0; i < MAX_CHALLENGES; i++) { 688202613Sdes if (cs->challenges[i] != NULL) { 689202613Sdes clean_http_auth_challenge(cs->challenges[i]); 690202613Sdes free(cs->challenges[i]); 691202613Sdes } 692202613Sdes } 693202613Sdes init_http_auth_challenges(cs); 694202613Sdes} 695202613Sdes 696221821Sdes/* 697202613Sdes * Enumeration for lexical elements. Separators will be returned as their own 698202613Sdes * ascii value 699202613Sdes */ 700202613Sdestypedef enum {HTTPHL_WORD=256, HTTPHL_STRING=257, HTTPHL_END=258, 701202613Sdes HTTPHL_ERROR = 259} http_header_lex_t; 702202613Sdes 703221821Sdes/* 704202613Sdes * Determine what kind of token comes next and return possible value 705202613Sdes * in buf, which is supposed to have been allocated big enough by 706221821Sdes * caller. Advance input pointer and return element type. 707202613Sdes */ 708221821Sdesstatic int 709202613Sdeshttp_header_lex(const char **cpp, char *buf) 710202613Sdes{ 711202613Sdes size_t l; 712202613Sdes /* Eat initial whitespace */ 713202613Sdes *cpp += strspn(*cpp, " \t"); 714202613Sdes if (**cpp == 0) 715202613Sdes return (HTTPHL_END); 716202613Sdes 717202613Sdes /* Separator ? */ 718202613Sdes if (**cpp == ',' || **cpp == '=') 719202613Sdes return (*((*cpp)++)); 720202613Sdes 721202613Sdes /* String ? */ 722202613Sdes if (**cpp == '"') { 723202613Sdes *cpp = http_parse_headerstring(++*cpp, buf); 724202613Sdes if (*cpp == NULL) 725202613Sdes return (HTTPHL_ERROR); 726202613Sdes return (HTTPHL_STRING); 727202613Sdes } 728202613Sdes 729202613Sdes /* Read other token, until separator or whitespace */ 730202613Sdes l = strcspn(*cpp, " \t,="); 731202613Sdes memcpy(buf, *cpp, l); 732202613Sdes buf[l] = 0; 733202613Sdes *cpp += l; 734202613Sdes return (HTTPHL_WORD); 735202613Sdes} 736202613Sdes 737221821Sdes/* 738202613Sdes * Read challenges from http xxx-authenticate header and accumulate them 739202613Sdes * in the challenges list structure. 740202613Sdes * 741202613Sdes * Headers with multiple challenges are specified by rfc2617, but 742202613Sdes * servers (ie: squid) often send them in separate headers instead, 743202613Sdes * which in turn is forbidden by the http spec (multiple headers with 744202613Sdes * the same name are only allowed for pure comma-separated lists, see 745202613Sdes * rfc2616 sec 4.2). 746202613Sdes * 747202613Sdes * We support both approaches anyway 748202613Sdes */ 749221821Sdesstatic int 750202613Sdeshttp_parse_authenticate(const char *cp, http_auth_challenges_t *cs) 751202613Sdes{ 752202613Sdes int ret = -1; 753202613Sdes http_header_lex_t lex; 754202613Sdes char *key = malloc(strlen(cp) + 1); 755202613Sdes char *value = malloc(strlen(cp) + 1); 756202613Sdes char *buf = malloc(strlen(cp) + 1); 757202613Sdes 758202613Sdes if (key == NULL || value == NULL || buf == NULL) { 759202613Sdes fetch_syserr(); 760202613Sdes goto out; 761202613Sdes } 762202613Sdes 763202613Sdes /* In any case we've seen the header and we set the valid bit */ 764202613Sdes cs->valid = 1; 765202613Sdes 766202613Sdes /* Need word first */ 767202613Sdes lex = http_header_lex(&cp, key); 768202613Sdes if (lex != HTTPHL_WORD) 769202613Sdes goto out; 770202613Sdes 771202613Sdes /* Loop on challenges */ 772202613Sdes for (; cs->count < MAX_CHALLENGES; cs->count++) { 773221821Sdes cs->challenges[cs->count] = 774202613Sdes malloc(sizeof(http_auth_challenge_t)); 775202613Sdes if (cs->challenges[cs->count] == NULL) { 776202613Sdes fetch_syserr(); 777202613Sdes goto out; 778202613Sdes } 779202613Sdes init_http_auth_challenge(cs->challenges[cs->count]); 780202613Sdes if (!strcasecmp(key, "basic")) { 781202613Sdes cs->challenges[cs->count]->scheme = HTTPAS_BASIC; 782202613Sdes } else if (!strcasecmp(key, "digest")) { 783202613Sdes cs->challenges[cs->count]->scheme = HTTPAS_DIGEST; 784202613Sdes } else { 785202613Sdes cs->challenges[cs->count]->scheme = HTTPAS_UNKNOWN; 786221821Sdes /* 787221821Sdes * Continue parsing as basic or digest may 788202613Sdes * follow, and the syntax is the same for 789202613Sdes * all. We'll just ignore this one when 790202613Sdes * looking at the list 791202613Sdes */ 792202613Sdes } 793221821Sdes 794202613Sdes /* Loop on attributes */ 795202613Sdes for (;;) { 796202613Sdes /* Key */ 797202613Sdes lex = http_header_lex(&cp, key); 798202613Sdes if (lex != HTTPHL_WORD) 799202613Sdes goto out; 800202613Sdes 801202613Sdes /* Equal sign */ 802202613Sdes lex = http_header_lex(&cp, buf); 803202613Sdes if (lex != '=') 804202613Sdes goto out; 805202613Sdes 806202613Sdes /* Value */ 807202613Sdes lex = http_header_lex(&cp, value); 808202613Sdes if (lex != HTTPHL_WORD && lex != HTTPHL_STRING) 809202613Sdes goto out; 810202613Sdes 811202613Sdes if (!strcasecmp(key, "realm")) 812221821Sdes cs->challenges[cs->count]->realm = 813202613Sdes strdup(value); 814202613Sdes else if (!strcasecmp(key, "qop")) 815221821Sdes cs->challenges[cs->count]->qop = 816202613Sdes strdup(value); 817202613Sdes else if (!strcasecmp(key, "nonce")) 818221821Sdes cs->challenges[cs->count]->nonce = 819202613Sdes strdup(value); 820202613Sdes else if (!strcasecmp(key, "opaque")) 821221821Sdes cs->challenges[cs->count]->opaque = 822202613Sdes strdup(value); 823202613Sdes else if (!strcasecmp(key, "algorithm")) 824221821Sdes cs->challenges[cs->count]->algo = 825202613Sdes strdup(value); 826202613Sdes else if (!strcasecmp(key, "stale")) 827221821Sdes cs->challenges[cs->count]->stale = 828202613Sdes strcasecmp(value, "no"); 829202613Sdes /* Else ignore unknown attributes */ 830202613Sdes 831202613Sdes /* Comma or Next challenge or End */ 832202613Sdes lex = http_header_lex(&cp, key); 833221821Sdes /* 834221821Sdes * If we get a word here, this is the beginning of the 835221821Sdes * next challenge. Break the attributes loop 836221821Sdes */ 837202613Sdes if (lex == HTTPHL_WORD) 838202613Sdes break; 839202613Sdes 840202613Sdes if (lex == HTTPHL_END) { 841202613Sdes /* End while looking for ',' is normal exit */ 842202613Sdes cs->count++; 843202613Sdes ret = 0; 844202613Sdes goto out; 845202613Sdes } 846202613Sdes /* Anything else is an error */ 847202613Sdes if (lex != ',') 848202613Sdes goto out; 849202613Sdes 850202613Sdes } /* End attributes loop */ 851202613Sdes } /* End challenge loop */ 852202613Sdes 853221821Sdes /* 854221821Sdes * Challenges max count exceeded. This really can't happen 855221821Sdes * with normal data, something's fishy -> error 856221821Sdes */ 857202613Sdes 858202613Sdesout: 859202613Sdes if (key) 860202613Sdes free(key); 861202613Sdes if (value) 862202613Sdes free(value); 863202613Sdes if (buf) 864202613Sdes free(buf); 865202613Sdes return (ret); 866202613Sdes} 867202613Sdes 868202613Sdes 86963012Sdes/* 87063012Sdes * Parse a last-modified header 87163012Sdes */ 87263716Sdesstatic int 873174588Sdeshttp_parse_mtime(const char *p, time_t *mtime) 87463012Sdes{ 87590267Sdes char locale[64], *r; 87690267Sdes struct tm tm; 87763012Sdes 878109967Sdes strncpy(locale, setlocale(LC_TIME, NULL), sizeof(locale)); 87990267Sdes setlocale(LC_TIME, "C"); 88090267Sdes r = strptime(p, "%a, %d %b %Y %H:%M:%S GMT", &tm); 881263325Sbdrewery /* 882263325Sbdrewery * Some proxies use UTC in response, but it should still be 883263325Sbdrewery * parsed. RFC2616 states GMT and UTC are exactly equal for HTTP. 884263325Sbdrewery */ 885263325Sbdrewery if (r == NULL) 886263325Sbdrewery r = strptime(p, "%a, %d %b %Y %H:%M:%S UTC", &tm); 88790267Sdes /* XXX should add support for date-2 and date-3 */ 88890267Sdes setlocale(LC_TIME, locale); 88990267Sdes if (r == NULL) 89090267Sdes return (-1); 89190267Sdes DEBUG(fprintf(stderr, "last modified: [%04d-%02d-%02d " 89288769Sdes "%02d:%02d:%02d]\n", 89363012Sdes tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 89463012Sdes tm.tm_hour, tm.tm_min, tm.tm_sec)); 89590267Sdes *mtime = timegm(&tm); 89690267Sdes return (0); 89763012Sdes} 89863012Sdes 89963012Sdes/* 90063012Sdes * Parse a content-length header 90163012Sdes */ 90263716Sdesstatic int 903174588Sdeshttp_parse_length(const char *p, off_t *length) 90463012Sdes{ 90590267Sdes off_t len; 90690267Sdes 907174761Sdes for (len = 0; *p && isdigit((unsigned char)*p); ++p) 90890267Sdes len = len * 10 + (*p - '0'); 90990267Sdes if (*p) 91090267Sdes return (-1); 91190267Sdes DEBUG(fprintf(stderr, "content length: [%lld]\n", 91290267Sdes (long long)len)); 91390267Sdes *length = len; 91490267Sdes return (0); 91563012Sdes} 91663012Sdes 91763012Sdes/* 91863012Sdes * Parse a content-range header 91963012Sdes */ 92063716Sdesstatic int 921174588Sdeshttp_parse_range(const char *p, off_t *offset, off_t *length, off_t *size) 92263012Sdes{ 92390267Sdes off_t first, last, len; 92463716Sdes 92590267Sdes if (strncasecmp(p, "bytes ", 6) != 0) 92690267Sdes return (-1); 927125696Sdes p += 6; 928125696Sdes if (*p == '*') { 929125696Sdes first = last = -1; 930125696Sdes ++p; 931125696Sdes } else { 932174761Sdes for (first = 0; *p && isdigit((unsigned char)*p); ++p) 933125696Sdes first = first * 10 + *p - '0'; 934125696Sdes if (*p != '-') 935125696Sdes return (-1); 936174761Sdes for (last = 0, ++p; *p && isdigit((unsigned char)*p); ++p) 937125696Sdes last = last * 10 + *p - '0'; 938125696Sdes } 93990267Sdes if (first > last || *p != '/') 94090267Sdes return (-1); 941174761Sdes for (len = 0, ++p; *p && isdigit((unsigned char)*p); ++p) 94290267Sdes len = len * 10 + *p - '0'; 94390267Sdes if (*p || len < last - first + 1) 94490267Sdes return (-1); 945125696Sdes if (first == -1) { 946125696Sdes DEBUG(fprintf(stderr, "content range: [*/%lld]\n", 947125696Sdes (long long)len)); 948125696Sdes *length = 0; 949125696Sdes } else { 950125696Sdes DEBUG(fprintf(stderr, "content range: [%lld-%lld/%lld]\n", 951125696Sdes (long long)first, (long long)last, (long long)len)); 952125696Sdes *length = last - first + 1; 953125696Sdes } 95490267Sdes *offset = first; 95590267Sdes *size = len; 95690267Sdes return (0); 95763012Sdes} 95863012Sdes 95990267Sdes 96063012Sdes/***************************************************************************** 96163012Sdes * Helper functions for authorization 96263012Sdes */ 96363012Sdes 96463012Sdes/* 96537608Sdes * Base64 encoding 96637608Sdes */ 96762965Sdesstatic char * 968174588Sdeshttp_base64(const char *src) 96937608Sdes{ 97090267Sdes static const char base64[] = 97190267Sdes "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 97290267Sdes "abcdefghijklmnopqrstuvwxyz" 97390267Sdes "0123456789+/"; 97490267Sdes char *str, *dst; 97590267Sdes size_t l; 97690267Sdes int t, r; 97762965Sdes 97890267Sdes l = strlen(src); 979133280Sdes if ((str = malloc(((l + 2) / 3) * 4 + 1)) == NULL) 98090267Sdes return (NULL); 98190267Sdes dst = str; 98290267Sdes r = 0; 98337608Sdes 98490267Sdes while (l >= 3) { 98590267Sdes t = (src[0] << 16) | (src[1] << 8) | src[2]; 98690267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 98790267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 98890267Sdes dst[2] = base64[(t >> 6) & 0x3f]; 98990267Sdes dst[3] = base64[(t >> 0) & 0x3f]; 99090267Sdes src += 3; l -= 3; 99190267Sdes dst += 4; r += 4; 99290267Sdes } 99337608Sdes 99490267Sdes switch (l) { 99590267Sdes case 2: 99690267Sdes t = (src[0] << 16) | (src[1] << 8); 99790267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 99890267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 99990267Sdes dst[2] = base64[(t >> 6) & 0x3f]; 100090267Sdes dst[3] = '='; 100190267Sdes dst += 4; 100290267Sdes r += 4; 100390267Sdes break; 100490267Sdes case 1: 100590267Sdes t = src[0] << 16; 100690267Sdes dst[0] = base64[(t >> 18) & 0x3f]; 100790267Sdes dst[1] = base64[(t >> 12) & 0x3f]; 100890267Sdes dst[2] = dst[3] = '='; 100990267Sdes dst += 4; 101090267Sdes r += 4; 101190267Sdes break; 101290267Sdes case 0: 101390267Sdes break; 101490267Sdes } 101590267Sdes 101690267Sdes *dst = 0; 101790267Sdes return (str); 101837608Sdes} 101937608Sdes 1020202613Sdes 102137608Sdes/* 1022202613Sdes * Extract authorization parameters from environment value. 1023202613Sdes * The value is like scheme:realm:user:pass 1024202613Sdes */ 1025202613Sdestypedef struct { 1026202613Sdes char *scheme; 1027202613Sdes char *realm; 1028202613Sdes char *user; 1029202613Sdes char *password; 1030202613Sdes} http_auth_params_t; 1031202613Sdes 1032202613Sdesstatic void 1033202613Sdesinit_http_auth_params(http_auth_params_t *s) 1034202613Sdes{ 1035268900Sbapt s->scheme = s->realm = s->user = s->password = NULL; 1036202613Sdes} 1037202613Sdes 1038221821Sdesstatic void 1039202613Sdesclean_http_auth_params(http_auth_params_t *s) 1040202613Sdes{ 1041221821Sdes if (s->scheme) 1042202613Sdes free(s->scheme); 1043221821Sdes if (s->realm) 1044202613Sdes free(s->realm); 1045221821Sdes if (s->user) 1046202613Sdes free(s->user); 1047221821Sdes if (s->password) 1048202613Sdes free(s->password); 1049202613Sdes init_http_auth_params(s); 1050202613Sdes} 1051202613Sdes 1052202613Sdesstatic int 1053202613Sdeshttp_authfromenv(const char *p, http_auth_params_t *parms) 1054202613Sdes{ 1055202613Sdes int ret = -1; 1056202613Sdes char *v, *ve; 1057202613Sdes char *str = strdup(p); 1058202613Sdes 1059202613Sdes if (str == NULL) { 1060202613Sdes fetch_syserr(); 1061202613Sdes return (-1); 1062202613Sdes } 1063202613Sdes v = str; 1064202613Sdes 1065202613Sdes if ((ve = strchr(v, ':')) == NULL) 1066202613Sdes goto out; 1067202613Sdes 1068202613Sdes *ve = 0; 1069202613Sdes if ((parms->scheme = strdup(v)) == NULL) { 1070202613Sdes fetch_syserr(); 1071202613Sdes goto out; 1072202613Sdes } 1073202613Sdes v = ve + 1; 1074202613Sdes 1075202613Sdes if ((ve = strchr(v, ':')) == NULL) 1076202613Sdes goto out; 1077202613Sdes 1078202613Sdes *ve = 0; 1079202613Sdes if ((parms->realm = strdup(v)) == NULL) { 1080202613Sdes fetch_syserr(); 1081202613Sdes goto out; 1082202613Sdes } 1083202613Sdes v = ve + 1; 1084202613Sdes 1085202613Sdes if ((ve = strchr(v, ':')) == NULL) 1086202613Sdes goto out; 1087202613Sdes 1088202613Sdes *ve = 0; 1089202613Sdes if ((parms->user = strdup(v)) == NULL) { 1090202613Sdes fetch_syserr(); 1091202613Sdes goto out; 1092202613Sdes } 1093202613Sdes v = ve + 1; 1094202613Sdes 1095202613Sdes 1096202613Sdes if ((parms->password = strdup(v)) == NULL) { 1097202613Sdes fetch_syserr(); 1098202613Sdes goto out; 1099202613Sdes } 1100202613Sdes ret = 0; 1101202613Sdesout: 1102221821Sdes if (ret == -1) 1103202613Sdes clean_http_auth_params(parms); 1104202613Sdes if (str) 1105202613Sdes free(str); 1106202613Sdes return (ret); 1107202613Sdes} 1108202613Sdes 1109202613Sdes 1110221821Sdes/* 1111202613Sdes * Digest response: the code to compute the digest is taken from the 1112221821Sdes * sample implementation in RFC2616 1113202613Sdes */ 1114221822Sdes#define IN const 1115202613Sdes#define OUT 1116202613Sdes 1117202613Sdes#define HASHLEN 16 1118202613Sdestypedef char HASH[HASHLEN]; 1119202613Sdes#define HASHHEXLEN 32 1120202613Sdestypedef char HASHHEX[HASHHEXLEN+1]; 1121202613Sdes 1122202613Sdesstatic const char *hexchars = "0123456789abcdef"; 1123221821Sdesstatic void 1124202613SdesCvtHex(IN HASH Bin, OUT HASHHEX Hex) 1125202613Sdes{ 1126202613Sdes unsigned short i; 1127202613Sdes unsigned char j; 1128202613Sdes 1129202613Sdes for (i = 0; i < HASHLEN; i++) { 1130202613Sdes j = (Bin[i] >> 4) & 0xf; 1131202613Sdes Hex[i*2] = hexchars[j]; 1132202613Sdes j = Bin[i] & 0xf; 1133202613Sdes Hex[i*2+1] = hexchars[j]; 1134268900Sbapt } 1135202613Sdes Hex[HASHHEXLEN] = '\0'; 1136202613Sdes}; 1137202613Sdes 1138202613Sdes/* calculate H(A1) as per spec */ 1139221821Sdesstatic void 1140202613SdesDigestCalcHA1( 1141202613Sdes IN char * pszAlg, 1142202613Sdes IN char * pszUserName, 1143202613Sdes IN char * pszRealm, 1144202613Sdes IN char * pszPassword, 1145202613Sdes IN char * pszNonce, 1146202613Sdes IN char * pszCNonce, 1147202613Sdes OUT HASHHEX SessionKey 1148202613Sdes ) 1149202613Sdes{ 1150202613Sdes MD5_CTX Md5Ctx; 1151202613Sdes HASH HA1; 1152202613Sdes 1153202613Sdes MD5Init(&Md5Ctx); 1154202613Sdes MD5Update(&Md5Ctx, pszUserName, strlen(pszUserName)); 1155202613Sdes MD5Update(&Md5Ctx, ":", 1); 1156202613Sdes MD5Update(&Md5Ctx, pszRealm, strlen(pszRealm)); 1157202613Sdes MD5Update(&Md5Ctx, ":", 1); 1158202613Sdes MD5Update(&Md5Ctx, pszPassword, strlen(pszPassword)); 1159202613Sdes MD5Final(HA1, &Md5Ctx); 1160202613Sdes if (strcasecmp(pszAlg, "md5-sess") == 0) { 1161202613Sdes 1162202613Sdes MD5Init(&Md5Ctx); 1163202613Sdes MD5Update(&Md5Ctx, HA1, HASHLEN); 1164202613Sdes MD5Update(&Md5Ctx, ":", 1); 1165202613Sdes MD5Update(&Md5Ctx, pszNonce, strlen(pszNonce)); 1166202613Sdes MD5Update(&Md5Ctx, ":", 1); 1167202613Sdes MD5Update(&Md5Ctx, pszCNonce, strlen(pszCNonce)); 1168202613Sdes MD5Final(HA1, &Md5Ctx); 1169268900Sbapt } 1170202613Sdes CvtHex(HA1, SessionKey); 1171202613Sdes} 1172202613Sdes 1173202613Sdes/* calculate request-digest/response-digest as per HTTP Digest spec */ 1174221821Sdesstatic void 1175202613SdesDigestCalcResponse( 1176202613Sdes IN HASHHEX HA1, /* H(A1) */ 1177202613Sdes IN char * pszNonce, /* nonce from server */ 1178202613Sdes IN char * pszNonceCount, /* 8 hex digits */ 1179202613Sdes IN char * pszCNonce, /* client nonce */ 1180202613Sdes IN char * pszQop, /* qop-value: "", "auth", "auth-int" */ 1181202613Sdes IN char * pszMethod, /* method from the request */ 1182202613Sdes IN char * pszDigestUri, /* requested URL */ 1183202613Sdes IN HASHHEX HEntity, /* H(entity body) if qop="auth-int" */ 1184202613Sdes OUT HASHHEX Response /* request-digest or response-digest */ 1185202613Sdes ) 1186202613Sdes{ 1187221821Sdes/* DEBUG(fprintf(stderr, 1188202613Sdes "Calc: HA1[%s] Nonce[%s] qop[%s] method[%s] URI[%s]\n", 1189202613Sdes HA1, pszNonce, pszQop, pszMethod, pszDigestUri));*/ 1190202613Sdes MD5_CTX Md5Ctx; 1191202613Sdes HASH HA2; 1192202613Sdes HASH RespHash; 1193202613Sdes HASHHEX HA2Hex; 1194202613Sdes 1195202613Sdes // calculate H(A2) 1196202613Sdes MD5Init(&Md5Ctx); 1197202613Sdes MD5Update(&Md5Ctx, pszMethod, strlen(pszMethod)); 1198202613Sdes MD5Update(&Md5Ctx, ":", 1); 1199202613Sdes MD5Update(&Md5Ctx, pszDigestUri, strlen(pszDigestUri)); 1200202613Sdes if (strcasecmp(pszQop, "auth-int") == 0) { 1201202613Sdes MD5Update(&Md5Ctx, ":", 1); 1202202613Sdes MD5Update(&Md5Ctx, HEntity, HASHHEXLEN); 1203268900Sbapt } 1204202613Sdes MD5Final(HA2, &Md5Ctx); 1205202613Sdes CvtHex(HA2, HA2Hex); 1206202613Sdes 1207202613Sdes // calculate response 1208202613Sdes MD5Init(&Md5Ctx); 1209202613Sdes MD5Update(&Md5Ctx, HA1, HASHHEXLEN); 1210202613Sdes MD5Update(&Md5Ctx, ":", 1); 1211202613Sdes MD5Update(&Md5Ctx, pszNonce, strlen(pszNonce)); 1212202613Sdes MD5Update(&Md5Ctx, ":", 1); 1213202613Sdes if (*pszQop) { 1214202613Sdes MD5Update(&Md5Ctx, pszNonceCount, strlen(pszNonceCount)); 1215202613Sdes MD5Update(&Md5Ctx, ":", 1); 1216202613Sdes MD5Update(&Md5Ctx, pszCNonce, strlen(pszCNonce)); 1217202613Sdes MD5Update(&Md5Ctx, ":", 1); 1218202613Sdes MD5Update(&Md5Ctx, pszQop, strlen(pszQop)); 1219202613Sdes MD5Update(&Md5Ctx, ":", 1); 1220268900Sbapt } 1221202613Sdes MD5Update(&Md5Ctx, HA2Hex, HASHHEXLEN); 1222202613Sdes MD5Final(RespHash, &Md5Ctx); 1223202613Sdes CvtHex(RespHash, Response); 1224202613Sdes} 1225202613Sdes 1226221821Sdes/* 1227221821Sdes * Generate/Send a Digest authorization header 1228202613Sdes * This looks like: [Proxy-]Authorization: credentials 1229202613Sdes * 1230202613Sdes * credentials = "Digest" digest-response 1231202613Sdes * digest-response = 1#( username | realm | nonce | digest-uri 1232202613Sdes * | response | [ algorithm ] | [cnonce] | 1233202613Sdes * [opaque] | [message-qop] | 1234202613Sdes * [nonce-count] | [auth-param] ) 1235202613Sdes * username = "username" "=" username-value 1236202613Sdes * username-value = quoted-string 1237202613Sdes * digest-uri = "uri" "=" digest-uri-value 1238202613Sdes * digest-uri-value = request-uri ; As specified by HTTP/1.1 1239202613Sdes * message-qop = "qop" "=" qop-value 1240202613Sdes * cnonce = "cnonce" "=" cnonce-value 1241202613Sdes * cnonce-value = nonce-value 1242202613Sdes * nonce-count = "nc" "=" nc-value 1243202613Sdes * nc-value = 8LHEX 1244202613Sdes * response = "response" "=" request-digest 1245202613Sdes * request-digest = <"> 32LHEX <"> 1246202613Sdes */ 1247202613Sdesstatic int 1248202613Sdeshttp_digest_auth(conn_t *conn, const char *hdr, http_auth_challenge_t *c, 1249202613Sdes http_auth_params_t *parms, struct url *url) 1250202613Sdes{ 1251202613Sdes int r; 1252202613Sdes char noncecount[10]; 1253202613Sdes char cnonce[40]; 1254268900Sbapt char *options = NULL; 1255202613Sdes 1256202613Sdes if (!c->realm || !c->nonce) { 1257202613Sdes DEBUG(fprintf(stderr, "realm/nonce not set in challenge\n")); 1258202613Sdes return(-1); 1259202613Sdes } 1260221821Sdes if (!c->algo) 1261202613Sdes c->algo = strdup(""); 1262202613Sdes 1263221821Sdes if (asprintf(&options, "%s%s%s%s", 1264202613Sdes *c->algo? ",algorithm=" : "", c->algo, 1265202613Sdes c->opaque? ",opaque=" : "", c->opaque?c->opaque:"")== -1) 1266202613Sdes return (-1); 1267202613Sdes 1268202613Sdes if (!c->qop) { 1269202613Sdes c->qop = strdup(""); 1270202613Sdes *noncecount = 0; 1271202613Sdes *cnonce = 0; 1272202613Sdes } else { 1273202613Sdes c->nc++; 1274202613Sdes sprintf(noncecount, "%08x", c->nc); 1275202613Sdes /* We don't try very hard with the cnonce ... */ 1276202613Sdes sprintf(cnonce, "%x%lx", getpid(), (unsigned long)time(0)); 1277202613Sdes } 1278202613Sdes 1279202613Sdes HASHHEX HA1; 1280202613Sdes DigestCalcHA1(c->algo, parms->user, c->realm, 1281202613Sdes parms->password, c->nonce, cnonce, HA1); 1282202613Sdes DEBUG(fprintf(stderr, "HA1: [%s]\n", HA1)); 1283202613Sdes HASHHEX digest; 1284202613Sdes DigestCalcResponse(HA1, c->nonce, noncecount, cnonce, c->qop, 1285202613Sdes "GET", url->doc, "", digest); 1286202613Sdes 1287202613Sdes if (c->qop[0]) { 1288202613Sdes r = http_cmd(conn, "%s: Digest username=\"%s\",realm=\"%s\"," 1289202613Sdes "nonce=\"%s\",uri=\"%s\",response=\"%s\"," 1290202613Sdes "qop=\"auth\", cnonce=\"%s\", nc=%s%s", 1291221821Sdes hdr, parms->user, c->realm, 1292202613Sdes c->nonce, url->doc, digest, 1293202613Sdes cnonce, noncecount, options); 1294202613Sdes } else { 1295202613Sdes r = http_cmd(conn, "%s: Digest username=\"%s\",realm=\"%s\"," 1296202613Sdes "nonce=\"%s\",uri=\"%s\",response=\"%s\"%s", 1297221821Sdes hdr, parms->user, c->realm, 1298202613Sdes c->nonce, url->doc, digest, options); 1299202613Sdes } 1300202613Sdes if (options) 1301202613Sdes free(options); 1302202613Sdes return (r); 1303202613Sdes} 1304202613Sdes 1305202613Sdes/* 130637608Sdes * Encode username and password 130737608Sdes */ 130862965Sdesstatic int 1309174588Sdeshttp_basic_auth(conn_t *conn, const char *hdr, const char *usr, const char *pwd) 131037608Sdes{ 131190267Sdes char *upw, *auth; 131290267Sdes int r; 131337608Sdes 1314202613Sdes DEBUG(fprintf(stderr, "basic: usr: [%s]\n", usr)); 1315202613Sdes DEBUG(fprintf(stderr, "basic: pwd: [%s]\n", pwd)); 131690267Sdes if (asprintf(&upw, "%s:%s", usr, pwd) == -1) 131790267Sdes return (-1); 1318174588Sdes auth = http_base64(upw); 131990267Sdes free(upw); 132090267Sdes if (auth == NULL) 132190267Sdes return (-1); 1322174588Sdes r = http_cmd(conn, "%s: Basic %s", hdr, auth); 132390267Sdes free(auth); 132490267Sdes return (r); 132562965Sdes} 132662965Sdes 132762965Sdes/* 1328221821Sdes * Chose the challenge to answer and call the appropriate routine to 1329202613Sdes * produce the header. 133062965Sdes */ 133162965Sdesstatic int 1332202613Sdeshttp_authorize(conn_t *conn, const char *hdr, http_auth_challenges_t *cs, 1333202613Sdes http_auth_params_t *parms, struct url *url) 133462965Sdes{ 1335202613Sdes http_auth_challenge_t *digest = NULL; 1336202613Sdes int i; 133762965Sdes 1338202613Sdes /* If user or pass are null we're not happy */ 1339202613Sdes if (!parms->user || !parms->password) { 1340202613Sdes DEBUG(fprintf(stderr, "NULL usr or pass\n")); 1341202613Sdes return (-1); 134290267Sdes } 1343202613Sdes 1344294194Sdes /* Look for a Digest */ 1345202613Sdes for (i = 0; i < cs->count; i++) { 1346202613Sdes if (cs->challenges[i]->scheme == HTTPAS_DIGEST) 1347202613Sdes digest = cs->challenges[i]; 1348202613Sdes } 1349202613Sdes 1350202613Sdes /* Error if "Digest" was specified and there is no Digest challenge */ 1351221821Sdes if (!digest && (parms->scheme && 1352202613Sdes !strcasecmp(parms->scheme, "digest"))) { 1353221821Sdes DEBUG(fprintf(stderr, 1354202613Sdes "Digest auth in env, not supported by peer\n")); 1355202613Sdes return (-1); 1356202613Sdes } 1357221821Sdes /* 1358221821Sdes * If "basic" was specified in the environment, or there is no Digest 1359202613Sdes * challenge, do the basic thing. Don't need a challenge for this, 1360221821Sdes * so no need to check basic!=NULL 1361202613Sdes */ 1362202613Sdes if (!digest || (parms->scheme && !strcasecmp(parms->scheme,"basic"))) 1363202613Sdes return (http_basic_auth(conn,hdr,parms->user,parms->password)); 1364202613Sdes 1365202613Sdes /* Else, prefer digest. We just checked that it's not NULL */ 1366202613Sdes return (http_digest_auth(conn, hdr, digest, parms, url)); 136737608Sdes} 136837608Sdes 136963012Sdes/***************************************************************************** 137063012Sdes * Helper functions for connecting to a server or proxy 137163012Sdes */ 137263012Sdes 137337608Sdes/* 137490267Sdes * Connect to the correct HTTP server or proxy. 137563012Sdes */ 137697856Sdesstatic conn_t * 1377174588Sdeshttp_connect(struct url *URL, struct url *purl, const char *flags) 137863012Sdes{ 1379249431Sdes struct url *curl; 138097856Sdes conn_t *conn; 1381294194Sdes hdr_t h; 1382294194Sdes http_headerbuf_t headerbuf; 1383294194Sdes const char *p; 138490267Sdes int verbose; 1385141958Skbyanc int af, val; 1386294194Sdes int serrno; 138790267Sdes 138863012Sdes#ifdef INET6 138990267Sdes af = AF_UNSPEC; 139060737Sume#else 139190267Sdes af = AF_INET; 139260737Sume#endif 139390267Sdes 139490267Sdes verbose = CHECK_FLAG('v'); 139590267Sdes if (CHECK_FLAG('4')) 139690267Sdes af = AF_INET; 139767043Sdes#ifdef INET6 139890267Sdes else if (CHECK_FLAG('6')) 139990267Sdes af = AF_INET6; 140067043Sdes#endif 140167043Sdes 1402249431Sdes curl = (purl != NULL) ? purl : URL; 140390267Sdes 1404249431Sdes if ((conn = fetch_connect(curl->host, curl->port, af, verbose)) == NULL) 1405174588Sdes /* fetch_connect() has already set an error code */ 140697856Sdes return (NULL); 1407294194Sdes init_http_headerbuf(&headerbuf); 1408249431Sdes if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0 && purl) { 1409249431Sdes http_cmd(conn, "CONNECT %s:%d HTTP/1.1", 1410249431Sdes URL->host, URL->port); 1411254650Sdes http_cmd(conn, "Host: %s:%d", 1412254650Sdes URL->host, URL->port); 1413249431Sdes http_cmd(conn, ""); 1414249431Sdes if (http_get_reply(conn) != HTTP_OK) { 1415294194Sdes http_seterr(conn->err); 1416294194Sdes goto ouch; 1417249431Sdes } 1418294194Sdes /* Read and discard the rest of the proxy response */ 1419294194Sdes if (fetch_getln(conn) < 0) { 1420294194Sdes fetch_syserr(); 1421294194Sdes goto ouch; 1422294194Sdes } 1423294194Sdes do { 1424294194Sdes switch ((h = http_next_header(conn, &headerbuf, &p))) { 1425294194Sdes case hdr_syserror: 1426294194Sdes fetch_syserr(); 1427294194Sdes goto ouch; 1428294194Sdes case hdr_error: 1429294194Sdes http_seterr(HTTP_PROTOCOL_ERROR); 1430294194Sdes goto ouch; 1431294194Sdes default: 1432294194Sdes /* ignore */ ; 1433294194Sdes } 1434294194Sdes } while (h < hdr_end); 1435249431Sdes } 143697868Sdes if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0 && 1437253680Sdes fetch_ssl(conn, URL, verbose) == -1) { 1438174588Sdes fetch_close(conn); 143997891Sdes /* grrr */ 144097891Sdes errno = EAUTH; 1441174588Sdes fetch_syserr(); 1442294194Sdes goto ouch; 144397868Sdes } 1444141958Skbyanc 1445141958Skbyanc val = 1; 1446141958Skbyanc setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val, sizeof(val)); 1447141958Skbyanc 1448294194Sdes clean_http_headerbuf(&headerbuf); 144997856Sdes return (conn); 1450294194Sdesouch: 1451294194Sdes serrno = errno; 1452294194Sdes clean_http_headerbuf(&headerbuf); 1453294194Sdes fetch_close(conn); 1454294194Sdes errno = serrno; 1455294194Sdes return (NULL); 145667043Sdes} 145767043Sdes 145867043Sdesstatic struct url * 1459174752Sdeshttp_get_proxy(struct url * url, const char *flags) 146067043Sdes{ 146190267Sdes struct url *purl; 146290267Sdes char *p; 146390267Sdes 1464112797Sdes if (flags != NULL && strchr(flags, 'd') != NULL) 1465112081Sdes return (NULL); 1466174752Sdes if (fetch_no_proxy_match(url->host)) 1467174752Sdes return (NULL); 146890267Sdes if (((p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && 1469149414Sdes *p && (purl = fetchParseURL(p))) { 147090267Sdes if (!*purl->scheme) 147190267Sdes strcpy(purl->scheme, SCHEME_HTTP); 147290267Sdes if (!purl->port) 1473174588Sdes purl->port = fetch_default_proxy_port(purl->scheme); 147490267Sdes if (strcasecmp(purl->scheme, SCHEME_HTTP) == 0) 147590267Sdes return (purl); 147690267Sdes fetchFreeURL(purl); 147790267Sdes } 147890267Sdes return (NULL); 147960376Sdes} 148060376Sdes 148188771Sdesstatic void 1482174588Sdeshttp_print_html(FILE *out, FILE *in) 148388771Sdes{ 148490267Sdes size_t len; 148590267Sdes char *line, *p, *q; 148690267Sdes int comment, tag; 148788771Sdes 148890267Sdes comment = tag = 0; 148990267Sdes while ((line = fgetln(in, &len)) != NULL) { 1490174761Sdes while (len && isspace((unsigned char)line[len - 1])) 149190267Sdes --len; 149290267Sdes for (p = q = line; q < line + len; ++q) { 149390267Sdes if (comment && *q == '-') { 149490267Sdes if (q + 2 < line + len && 149590267Sdes strcmp(q, "-->") == 0) { 149690267Sdes tag = comment = 0; 149790267Sdes q += 2; 149890267Sdes } 149990267Sdes } else if (tag && !comment && *q == '>') { 150090267Sdes p = q + 1; 150190267Sdes tag = 0; 150290267Sdes } else if (!tag && *q == '<') { 150390267Sdes if (q > p) 150490267Sdes fwrite(p, q - p, 1, out); 150590267Sdes tag = 1; 150690267Sdes if (q + 3 < line + len && 150790267Sdes strcmp(q, "<!--") == 0) { 150890267Sdes comment = 1; 150990267Sdes q += 3; 151090267Sdes } 151190267Sdes } 151288771Sdes } 151390267Sdes if (!tag && q > p) 151490267Sdes fwrite(p, q - p, 1, out); 151590267Sdes fputc('\n', out); 151688771Sdes } 151788771Sdes} 151888771Sdes 151990267Sdes 152063012Sdes/***************************************************************************** 152163012Sdes * Core 152260954Sdes */ 152360954Sdes 1524268900SbaptFILE * 1525268900Sbapthttp_request(struct url *URL, const char *op, struct url_stat *us, 1526268900Sbapt struct url *purl, const char *flags) 1527268900Sbapt{ 1528268900Sbapt 1529268900Sbapt return (http_request_body(URL, op, us, purl, flags, NULL, NULL)); 1530268900Sbapt} 1531268900Sbapt 153260954Sdes/* 153363012Sdes * Send a request and process the reply 153497866Sdes * 153597866Sdes * XXX This function is way too long, the do..while loop should be split 153697866Sdes * XXX off into a separate function. 153760376Sdes */ 153867043SdesFILE * 1539268900Sbapthttp_request_body(struct url *URL, const char *op, struct url_stat *us, 1540268900Sbapt struct url *purl, const char *flags, const char *content_type, 1541268900Sbapt const char *body) 154260376Sdes{ 1543186124Smurray char timebuf[80]; 1544186124Smurray char hbuf[MAXHOSTNAMELEN + 7], *host; 154597856Sdes conn_t *conn; 154690267Sdes struct url *url, *new; 1547202613Sdes int chunked, direct, ims, noredirect, verbose; 1548143049Skbyanc int e, i, n, val; 154990267Sdes off_t offset, clength, length, size; 155090267Sdes time_t mtime; 155190267Sdes const char *p; 155290267Sdes FILE *f; 155390267Sdes hdr_t h; 1554186124Smurray struct tm *timestruct; 1555202613Sdes http_headerbuf_t headerbuf; 1556202613Sdes http_auth_challenges_t server_challenges; 1557202613Sdes http_auth_challenges_t proxy_challenges; 1558268900Sbapt size_t body_len; 155963012Sdes 1560202613Sdes /* The following calls don't allocate anything */ 1561221821Sdes init_http_headerbuf(&headerbuf); 1562202613Sdes init_http_auth_challenges(&server_challenges); 1563202613Sdes init_http_auth_challenges(&proxy_challenges); 1564202613Sdes 156590267Sdes direct = CHECK_FLAG('d'); 156690267Sdes noredirect = CHECK_FLAG('A'); 156790267Sdes verbose = CHECK_FLAG('v'); 1568186124Smurray ims = CHECK_FLAG('i'); 156960737Sume 157090267Sdes if (direct && purl) { 157190267Sdes fetchFreeURL(purl); 157290267Sdes purl = NULL; 157390267Sdes } 157463716Sdes 157590267Sdes /* try the provided URL first */ 157690267Sdes url = URL; 157763012Sdes 1578241840Seadler n = MAX_REDIRECT; 157990267Sdes i = 0; 158063012Sdes 158198422Sdes e = HTTP_PROTOCOL_ERROR; 158290267Sdes do { 158390267Sdes new = NULL; 158490267Sdes chunked = 0; 158590267Sdes offset = 0; 158690267Sdes clength = -1; 158790267Sdes length = -1; 158890267Sdes size = -1; 158990267Sdes mtime = 0; 159090267Sdes 159190267Sdes /* check port */ 159290267Sdes if (!url->port) 1593174588Sdes url->port = fetch_default_port(url->scheme); 159490267Sdes 159590267Sdes /* were we redirected to an FTP URL? */ 159690267Sdes if (purl == NULL && strcmp(url->scheme, SCHEME_FTP) == 0) { 159790267Sdes if (strcmp(op, "GET") == 0) 1598174588Sdes return (ftp_request(url, "RETR", us, purl, flags)); 159990267Sdes else if (strcmp(op, "HEAD") == 0) 1600174588Sdes return (ftp_request(url, "STAT", us, purl, flags)); 160190267Sdes } 160290267Sdes 160390267Sdes /* connect to server or proxy */ 1604174588Sdes if ((conn = http_connect(url, purl, flags)) == NULL) 160590267Sdes goto ouch; 160690267Sdes 160790267Sdes host = url->host; 160860737Sume#ifdef INET6 160990267Sdes if (strchr(url->host, ':')) { 161090267Sdes snprintf(hbuf, sizeof(hbuf), "[%s]", url->host); 161190267Sdes host = hbuf; 161290267Sdes } 161360737Sume#endif 1614174588Sdes if (url->port != fetch_default_port(url->scheme)) { 1615107372Sdes if (host != hbuf) { 1616107372Sdes strcpy(hbuf, host); 1617107372Sdes host = hbuf; 1618107372Sdes } 1619107372Sdes snprintf(hbuf + strlen(hbuf), 1620107372Sdes sizeof(hbuf) - strlen(hbuf), ":%d", url->port); 1621107372Sdes } 162237535Sdes 162390267Sdes /* send request */ 162490267Sdes if (verbose) 1625174588Sdes fetch_info("requesting %s://%s%s", 1626107372Sdes url->scheme, host, url->doc); 1627253514Sdes if (purl && strcasecmp(URL->scheme, SCHEME_HTTPS) != 0) { 1628174588Sdes http_cmd(conn, "%s %s://%s%s HTTP/1.1", 1629107372Sdes op, url->scheme, host, url->doc); 163090267Sdes } else { 1631174588Sdes http_cmd(conn, "%s %s HTTP/1.1", 163290267Sdes op, url->doc); 163390267Sdes } 163437535Sdes 1635186124Smurray if (ims && url->ims_time) { 1636186124Smurray timestruct = gmtime((time_t *)&url->ims_time); 1637186124Smurray (void)strftime(timebuf, 80, "%a, %d %b %Y %T GMT", 1638186124Smurray timestruct); 1639186124Smurray if (verbose) 1640186124Smurray fetch_info("If-Modified-Since: %s", timebuf); 1641186124Smurray http_cmd(conn, "If-Modified-Since: %s", timebuf); 1642186124Smurray } 164390267Sdes /* virtual host */ 1644174588Sdes http_cmd(conn, "Host: %s", host); 164590267Sdes 1646221821Sdes /* 1647221821Sdes * Proxy authorization: we only send auth after we received 1648221821Sdes * a 407 error. We do not first try basic anyway (changed 1649221821Sdes * when support was added for digest-auth) 1650221821Sdes */ 1651202613Sdes if (purl && proxy_challenges.valid) { 1652202613Sdes http_auth_params_t aparams; 1653202613Sdes init_http_auth_params(&aparams); 1654202613Sdes if (*purl->user || *purl->pwd) { 1655284643Sdim aparams.user = strdup(purl->user); 1656284643Sdim aparams.password = strdup(purl->pwd); 1657221821Sdes } else if ((p = getenv("HTTP_PROXY_AUTH")) != NULL && 1658202613Sdes *p != '\0') { 1659202613Sdes if (http_authfromenv(p, &aparams) < 0) { 1660202613Sdes http_seterr(HTTP_NEED_PROXY_AUTH); 1661202613Sdes goto ouch; 1662202613Sdes } 1663294194Sdes } else if (fetch_netrc_auth(purl) == 0) { 1664294194Sdes aparams.user = strdup(purl->user); 1665294194Sdes aparams.password = strdup(purl->pwd); 1666202613Sdes } 1667221821Sdes http_authorize(conn, "Proxy-Authorization", 1668202613Sdes &proxy_challenges, &aparams, url); 1669202613Sdes clean_http_auth_params(&aparams); 167090267Sdes } 167190267Sdes 1672221821Sdes /* 1673221821Sdes * Server authorization: we never send "a priori" 1674202613Sdes * Basic auth, which used to be done if user/pass were 1675202613Sdes * set in the url. This would be weird because we'd send the 1676221821Sdes * password in the clear even if Digest is finally to be 1677202613Sdes * used (it would have made more sense for the 1678221821Sdes * pre-digest version to do this when Basic was specified 1679221821Sdes * in the environment) 1680221821Sdes */ 1681202613Sdes if (server_challenges.valid) { 1682202613Sdes http_auth_params_t aparams; 1683202613Sdes init_http_auth_params(&aparams); 1684202613Sdes if (*url->user || *url->pwd) { 1685284643Sdim aparams.user = strdup(url->user); 1686284643Sdim aparams.password = strdup(url->pwd); 1687221821Sdes } else if ((p = getenv("HTTP_AUTH")) != NULL && 1688202613Sdes *p != '\0') { 1689202613Sdes if (http_authfromenv(p, &aparams) < 0) { 1690202613Sdes http_seterr(HTTP_NEED_AUTH); 1691202613Sdes goto ouch; 1692202613Sdes } 1693294194Sdes } else if (fetch_netrc_auth(url) == 0) { 1694294194Sdes aparams.user = strdup(url->user); 1695294194Sdes aparams.password = strdup(url->pwd); 1696221821Sdes } else if (fetchAuthMethod && 1697202613Sdes fetchAuthMethod(url) == 0) { 1698284643Sdim aparams.user = strdup(url->user); 1699284643Sdim aparams.password = strdup(url->pwd); 170090267Sdes } else { 1701174588Sdes http_seterr(HTTP_NEED_AUTH); 170290267Sdes goto ouch; 170390267Sdes } 1704221821Sdes http_authorize(conn, "Authorization", 1705202613Sdes &server_challenges, &aparams, url); 1706202613Sdes clean_http_auth_params(&aparams); 170790267Sdes } 170890267Sdes 170990267Sdes /* other headers */ 1710253805Sdes if ((p = getenv("HTTP_ACCEPT")) != NULL) { 1711253805Sdes if (*p != '\0') 1712253805Sdes http_cmd(conn, "Accept: %s", p); 1713253805Sdes } else { 1714253805Sdes http_cmd(conn, "Accept: */*"); 1715253805Sdes } 1716107372Sdes if ((p = getenv("HTTP_REFERER")) != NULL && *p != '\0') { 1717107372Sdes if (strcasecmp(p, "auto") == 0) 1718174588Sdes http_cmd(conn, "Referer: %s://%s%s", 1719107372Sdes url->scheme, host, url->doc); 1720107372Sdes else 1721174588Sdes http_cmd(conn, "Referer: %s", p); 1722107372Sdes } 1723270460Sdes if ((p = getenv("HTTP_USER_AGENT")) != NULL) { 1724270460Sdes /* no User-Agent if defined but empty */ 1725270460Sdes if (*p != '\0') 1726270460Sdes http_cmd(conn, "User-Agent: %s", p); 1727270460Sdes } else { 1728270460Sdes /* default User-Agent */ 1729270460Sdes http_cmd(conn, "User-Agent: %s " _LIBFETCH_VER, 1730270460Sdes getprogname()); 1731270460Sdes } 1732109693Sdes if (url->offset > 0) 1733174588Sdes http_cmd(conn, "Range: bytes=%lld-", (long long)url->offset); 1734174588Sdes http_cmd(conn, "Connection: close"); 1735268900Sbapt 1736268900Sbapt if (body) { 1737268900Sbapt body_len = strlen(body); 1738268900Sbapt http_cmd(conn, "Content-Length: %zu", body_len); 1739268900Sbapt if (content_type != NULL) 1740268900Sbapt http_cmd(conn, "Content-Type: %s", content_type); 1741268900Sbapt } 1742268900Sbapt 1743174588Sdes http_cmd(conn, ""); 174490267Sdes 1745268900Sbapt if (body) 1746268900Sbapt fetch_write(conn, body, body_len); 1747268900Sbapt 1748143049Skbyanc /* 1749143049Skbyanc * Force the queued request to be dispatched. Normally, one 1750143049Skbyanc * would do this with shutdown(2) but squid proxies can be 1751143049Skbyanc * configured to disallow such half-closed connections. To 1752143049Skbyanc * be compatible with such configurations, fiddle with socket 1753143049Skbyanc * options to force the pending data to be written. 1754143049Skbyanc */ 1755143049Skbyanc val = 0; 1756143049Skbyanc setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val, 1757143049Skbyanc sizeof(val)); 1758143049Skbyanc val = 1; 1759143049Skbyanc setsockopt(conn->sd, IPPROTO_TCP, TCP_NODELAY, &val, 1760143049Skbyanc sizeof(val)); 1761143049Skbyanc 176290267Sdes /* get reply */ 1763174588Sdes switch (http_get_reply(conn)) { 176490267Sdes case HTTP_OK: 176590267Sdes case HTTP_PARTIAL: 1766186124Smurray case HTTP_NOT_MODIFIED: 176790267Sdes /* fine */ 176890267Sdes break; 176990267Sdes case HTTP_MOVED_PERM: 177090267Sdes case HTTP_MOVED_TEMP: 177190267Sdes case HTTP_SEE_OTHER: 1772241841Seadler case HTTP_USE_PROXY: 177390267Sdes /* 1774125695Sdes * Not so fine, but we still have to read the 1775125695Sdes * headers to get the new location. 177690267Sdes */ 177790267Sdes break; 177890267Sdes case HTTP_NEED_AUTH: 1779202613Sdes if (server_challenges.valid) { 178090267Sdes /* 1781125695Sdes * We already sent out authorization code, 1782125695Sdes * so there's nothing more we can do. 178390267Sdes */ 1784174588Sdes http_seterr(conn->err); 178590267Sdes goto ouch; 178690267Sdes } 178790267Sdes /* try again, but send the password this time */ 178890267Sdes if (verbose) 1789174588Sdes fetch_info("server requires authorization"); 179090267Sdes break; 179190267Sdes case HTTP_NEED_PROXY_AUTH: 1792202613Sdes if (proxy_challenges.valid) { 1793202613Sdes /* 1794202613Sdes * We already sent our proxy 1795202613Sdes * authorization code, so there's 1796202613Sdes * nothing more we can do. */ 1797202613Sdes http_seterr(conn->err); 1798202613Sdes goto ouch; 1799202613Sdes } 1800202613Sdes /* try again, but send the password this time */ 1801202613Sdes if (verbose) 1802202613Sdes fetch_info("proxy requires authorization"); 1803202613Sdes break; 1804125696Sdes case HTTP_BAD_RANGE: 1805125696Sdes /* 1806125696Sdes * This can happen if we ask for 0 bytes because 1807125696Sdes * we already have the whole file. Consider this 1808125696Sdes * a success for now, and check sizes later. 1809125696Sdes */ 1810125696Sdes break; 181190267Sdes case HTTP_PROTOCOL_ERROR: 181290267Sdes /* fall through */ 181390267Sdes case -1: 1814174588Sdes fetch_syserr(); 181590267Sdes goto ouch; 181690267Sdes default: 1817174588Sdes http_seterr(conn->err); 181890267Sdes if (!verbose) 181990267Sdes goto ouch; 182090267Sdes /* fall through so we can get the full error message */ 182190267Sdes } 182290267Sdes 1823202613Sdes /* get headers. http_next_header expects one line readahead */ 1824202613Sdes if (fetch_getln(conn) == -1) { 1825243149Sdes fetch_syserr(); 1826243149Sdes goto ouch; 1827202613Sdes } 182890267Sdes do { 1829243149Sdes switch ((h = http_next_header(conn, &headerbuf, &p))) { 183090267Sdes case hdr_syserror: 1831174588Sdes fetch_syserr(); 183290267Sdes goto ouch; 183390267Sdes case hdr_error: 1834174588Sdes http_seterr(HTTP_PROTOCOL_ERROR); 183590267Sdes goto ouch; 183690267Sdes case hdr_content_length: 1837174588Sdes http_parse_length(p, &clength); 183890267Sdes break; 183990267Sdes case hdr_content_range: 1840174588Sdes http_parse_range(p, &offset, &length, &size); 184190267Sdes break; 184290267Sdes case hdr_last_modified: 1843174588Sdes http_parse_mtime(p, &mtime); 184490267Sdes break; 184590267Sdes case hdr_location: 184697856Sdes if (!HTTP_REDIRECT(conn->err)) 184790267Sdes break; 1848241840Seadler /* 1849241840Seadler * if the A flag is set, we don't follow 1850241840Seadler * temporary redirects. 1851241840Seadler */ 1852241840Seadler if (noredirect && 1853241840Seadler conn->err != HTTP_MOVED_PERM && 1854241841Seadler conn->err != HTTP_PERM_REDIRECT && 1855241841Seadler conn->err != HTTP_USE_PROXY) { 1856241840Seadler n = 1; 1857241840Seadler break; 1858243149Sdes } 185990267Sdes if (new) 186090267Sdes free(new); 186190267Sdes if (verbose) 1862174588Sdes fetch_info("%d redirect to %s", conn->err, p); 186390267Sdes if (*p == '/') 186490267Sdes /* absolute path */ 186590267Sdes new = fetchMakeURL(url->scheme, url->host, url->port, p, 186690267Sdes url->user, url->pwd); 186790267Sdes else 186890267Sdes new = fetchParseURL(p); 186990267Sdes if (new == NULL) { 187090267Sdes /* XXX should set an error code */ 187190267Sdes DEBUG(fprintf(stderr, "failed to parse new URL\n")); 187290267Sdes goto ouch; 187390267Sdes } 1874234838Sdes 1875234838Sdes /* Only copy credentials if the host matches */ 1876234838Sdes if (!strcmp(new->host, url->host) && !*new->user && !*new->pwd) { 187790267Sdes strcpy(new->user, url->user); 187890267Sdes strcpy(new->pwd, url->pwd); 187990267Sdes } 188090267Sdes new->offset = url->offset; 188190267Sdes new->length = url->length; 188290267Sdes break; 188390267Sdes case hdr_transfer_encoding: 188490267Sdes /* XXX weak test*/ 188590267Sdes chunked = (strcasecmp(p, "chunked") == 0); 188690267Sdes break; 188790267Sdes case hdr_www_authenticate: 188897856Sdes if (conn->err != HTTP_NEED_AUTH) 188990267Sdes break; 1890210563Sdes if (http_parse_authenticate(p, &server_challenges) == 0) 1891209632Sdes ++n; 189290267Sdes break; 1893202613Sdes case hdr_proxy_authenticate: 1894202613Sdes if (conn->err != HTTP_NEED_PROXY_AUTH) 1895202613Sdes break; 1896210563Sdes if (http_parse_authenticate(p, &proxy_challenges) == 0) 1897209632Sdes ++n; 1898202613Sdes break; 189990267Sdes case hdr_end: 190090267Sdes /* fall through */ 190190267Sdes case hdr_unknown: 190290267Sdes /* ignore */ 190390267Sdes break; 190490267Sdes } 190590267Sdes } while (h > hdr_end); 190690267Sdes 190790267Sdes /* we need to provide authentication */ 1908221821Sdes if (conn->err == HTTP_NEED_AUTH || 1909202613Sdes conn->err == HTTP_NEED_PROXY_AUTH) { 191098422Sdes e = conn->err; 1911221821Sdes if ((conn->err == HTTP_NEED_AUTH && 1912221821Sdes !server_challenges.valid) || 1913221821Sdes (conn->err == HTTP_NEED_PROXY_AUTH && 1914202613Sdes !proxy_challenges.valid)) { 1915202613Sdes /* 401/7 but no www/proxy-authenticate ?? */ 1916202613Sdes DEBUG(fprintf(stderr, "401/7 and no auth header\n")); 1917202613Sdes goto ouch; 1918202613Sdes } 1919174588Sdes fetch_close(conn); 192097856Sdes conn = NULL; 192190267Sdes continue; 192290267Sdes } 192390267Sdes 1924125696Sdes /* requested range not satisfiable */ 1925125696Sdes if (conn->err == HTTP_BAD_RANGE) { 1926125696Sdes if (url->offset == size && url->length == 0) { 1927125696Sdes /* asked for 0 bytes; fake it */ 1928125696Sdes offset = url->offset; 1929184222Sru clength = -1; 1930125696Sdes conn->err = HTTP_OK; 1931125696Sdes break; 1932125696Sdes } else { 1933174588Sdes http_seterr(conn->err); 1934125696Sdes goto ouch; 1935125696Sdes } 1936125696Sdes } 1937125696Sdes 1938104404Sru /* we have a hit or an error */ 1939186124Smurray if (conn->err == HTTP_OK 1940186124Smurray || conn->err == HTTP_NOT_MODIFIED 1941186124Smurray || conn->err == HTTP_PARTIAL 1942186124Smurray || HTTP_ERROR(conn->err)) 1943104404Sru break; 1944104404Sru 194590267Sdes /* all other cases: we got a redirect */ 194698422Sdes e = conn->err; 1947202613Sdes clean_http_auth_challenges(&server_challenges); 1948174588Sdes fetch_close(conn); 194997856Sdes conn = NULL; 195090267Sdes if (!new) { 195190267Sdes DEBUG(fprintf(stderr, "redirect with no new location\n")); 195290267Sdes break; 195390267Sdes } 195490267Sdes if (url != URL) 195590267Sdes fetchFreeURL(url); 195690267Sdes url = new; 195790267Sdes } while (++i < n); 195890267Sdes 195990267Sdes /* we failed, or ran out of retries */ 196097856Sdes if (conn == NULL) { 1961174588Sdes http_seterr(e); 196263012Sdes goto ouch; 196363012Sdes } 196460376Sdes 196590267Sdes DEBUG(fprintf(stderr, "offset %lld, length %lld," 196690267Sdes " size %lld, clength %lld\n", 196790267Sdes (long long)offset, (long long)length, 196890267Sdes (long long)size, (long long)clength)); 196960376Sdes 1970186124Smurray if (conn->err == HTTP_NOT_MODIFIED) { 1971186124Smurray http_seterr(HTTP_NOT_MODIFIED); 1972186124Smurray return (NULL); 1973186124Smurray } 1974186124Smurray 197590267Sdes /* check for inconsistencies */ 197690267Sdes if (clength != -1 && length != -1 && clength != length) { 1977174588Sdes http_seterr(HTTP_PROTOCOL_ERROR); 197863012Sdes goto ouch; 197963012Sdes } 198090267Sdes if (clength == -1) 198190267Sdes clength = length; 198290267Sdes if (clength != -1) 198390267Sdes length = offset + clength; 198490267Sdes if (length != -1 && size != -1 && length != size) { 1985174588Sdes http_seterr(HTTP_PROTOCOL_ERROR); 198663012Sdes goto ouch; 198790267Sdes } 198890267Sdes if (size == -1) 198990267Sdes size = length; 199060376Sdes 199190267Sdes /* fill in stats */ 199290267Sdes if (us) { 199390267Sdes us->size = size; 199490267Sdes us->atime = us->mtime = mtime; 199590267Sdes } 199663069Sdes 199790267Sdes /* too far? */ 1998109693Sdes if (URL->offset > 0 && offset > URL->offset) { 1999174588Sdes http_seterr(HTTP_PROTOCOL_ERROR); 200090267Sdes goto ouch; 200177238Sdes } 200260376Sdes 200390267Sdes /* report back real offset and size */ 200490267Sdes URL->offset = offset; 200590267Sdes URL->length = clength; 200637535Sdes 200790267Sdes /* wrap it up in a FILE */ 2008174588Sdes if ((f = http_funopen(conn, chunked)) == NULL) { 2009174588Sdes fetch_syserr(); 201090267Sdes goto ouch; 201190267Sdes } 201263716Sdes 201390267Sdes if (url != URL) 201490267Sdes fetchFreeURL(url); 201590267Sdes if (purl) 201690267Sdes fetchFreeURL(purl); 201763567Sdes 201897856Sdes if (HTTP_ERROR(conn->err)) { 2019174588Sdes http_print_html(stderr, f); 202090267Sdes fclose(f); 202190267Sdes f = NULL; 202290267Sdes } 2023202613Sdes clean_http_headerbuf(&headerbuf); 2024202613Sdes clean_http_auth_challenges(&server_challenges); 2025202613Sdes clean_http_auth_challenges(&proxy_challenges); 202690267Sdes return (f); 202788771Sdes 202890267Sdesouch: 202990267Sdes if (url != URL) 203090267Sdes fetchFreeURL(url); 203190267Sdes if (purl) 203290267Sdes fetchFreeURL(purl); 203397856Sdes if (conn != NULL) 2034174588Sdes fetch_close(conn); 2035202613Sdes clean_http_headerbuf(&headerbuf); 2036202613Sdes clean_http_auth_challenges(&server_challenges); 2037202613Sdes clean_http_auth_challenges(&proxy_challenges); 203890267Sdes return (NULL); 203963012Sdes} 204060189Sdes 204190267Sdes 204263012Sdes/***************************************************************************** 204363012Sdes * Entry points 204463012Sdes */ 204563012Sdes 204663012Sdes/* 204763340Sdes * Retrieve and stat a file by HTTP 204863340Sdes */ 204963340SdesFILE * 205075891SarchiefetchXGetHTTP(struct url *URL, struct url_stat *us, const char *flags) 205163340Sdes{ 2052174752Sdes return (http_request(URL, "GET", us, http_get_proxy(URL, flags), flags)); 205363340Sdes} 205463340Sdes 205563340Sdes/* 205663012Sdes * Retrieve a file by HTTP 205763012Sdes */ 205863012SdesFILE * 205975891SarchiefetchGetHTTP(struct url *URL, const char *flags) 206063012Sdes{ 206190267Sdes return (fetchXGetHTTP(URL, NULL, flags)); 206237535Sdes} 206337535Sdes 206463340Sdes/* 206563340Sdes * Store a file by HTTP 206663340Sdes */ 206737535SdesFILE * 206885093SdesfetchPutHTTP(struct url *URL __unused, const char *flags __unused) 206937535Sdes{ 207090267Sdes warnx("fetchPutHTTP(): not implemented"); 207190267Sdes return (NULL); 207237535Sdes} 207340975Sdes 207440975Sdes/* 207540975Sdes * Get an HTTP document's metadata 207640975Sdes */ 207740975Sdesint 207875891SarchiefetchStatHTTP(struct url *URL, struct url_stat *us, const char *flags) 207940975Sdes{ 208090267Sdes FILE *f; 208190267Sdes 2082174752Sdes f = http_request(URL, "HEAD", us, http_get_proxy(URL, flags), flags); 2083112081Sdes if (f == NULL) 208490267Sdes return (-1); 208590267Sdes fclose(f); 208690267Sdes return (0); 208740975Sdes} 208841989Sdes 208941989Sdes/* 209041989Sdes * List a directory 209141989Sdes */ 209241989Sdesstruct url_ent * 209385093SdesfetchListHTTP(struct url *url __unused, const char *flags __unused) 209441989Sdes{ 209590267Sdes warnx("fetchListHTTP(): not implemented"); 209690267Sdes return (NULL); 209741989Sdes} 2098268900Sbapt 2099268900SbaptFILE * 2100268900SbaptfetchReqHTTP(struct url *URL, const char *method, const char *flags, 2101268900Sbapt const char *content_type, const char *body) 2102268900Sbapt{ 2103268900Sbapt 2104268900Sbapt return (http_request_body(URL, method, NULL, http_get_proxy(URL, flags), 2105268900Sbapt flags, content_type, body)); 2106268900Sbapt} 2107