http.c revision 221821
133965Sjdp/*- 278828Sobrien * Copyright (c) 2000-2004 Dag-Erling Co�dan Sm�rgrav 3218822Sdim * All rights reserved. 438889Sjdp * 533965Sjdp * Redistribution and use in source and binary forms, with or without 633965Sjdp * modification, are permitted provided that the following conditions 733965Sjdp * are met: 833965Sjdp * 1. Redistributions of source code must retain the above copyright 933965Sjdp * notice, this list of conditions and the following disclaimer 1033965Sjdp * in this position and unchanged. 1133965Sjdp * 2. Redistributions in binary form must reproduce the above copyright 1233965Sjdp * notice, this list of conditions and the following disclaimer in the 1333965Sjdp * documentation and/or other materials provided with the distribution. 1433965Sjdp * 3. The name of the author may not be used to endorse or promote products 1533965Sjdp * derived from this software without specific prior written permission. 1633965Sjdp * 1733965Sjdp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1833965Sjdp * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1933965Sjdp * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20218822Sdim * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21218822Sdim * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2233965Sjdp * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23218822Sdim * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2433965Sjdp * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2533965Sjdp * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2633965Sjdp * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2733965Sjdp */ 28218822Sdim 2933965Sjdp#include <sys/cdefs.h> 3061843Sobrien__FBSDID("$FreeBSD: head/lib/libfetch/http.c 221821 2011-05-12 21:18:55Z des $"); 31130561Sobrien 32130561Sobrien/* 3333965Sjdp * The following copyright applies to the base64 code: 34218822Sdim * 3533965Sjdp *- 3638889Sjdp * Copyright 1997 Massachusetts Institute of Technology 3738889Sjdp * 3838889Sjdp * Permission to use, copy, modify, and distribute this software and 39104834Sobrien * its documentation for any purpose and without fee is hereby 4038889Sjdp * granted, provided that both the above copyright notice and this 4138889Sjdp * permission notice appear in all copies, that both the above 4238889Sjdp * copyright notice and this permission notice appear in all 4338889Sjdp * supporting documentation, and that the name of M.I.T. not be used 4438889Sjdp * in advertising or publicity pertaining to distribution of the 4538889Sjdp * software without specific, written prior permission. M.I.T. makes 4638889Sjdp * no representations about the suitability of this software for any 4760484Sobrien * purpose. It is provided "as is" without express or implied 4860484Sobrien * warranty. 4960484Sobrien * 5060484Sobrien * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 5160484Sobrien * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 5260484Sobrien * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 5360484Sobrien * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 5460484Sobrien * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5589857Sobrien * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 5689857Sobrien * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 5789857Sobrien * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 5889857Sobrien * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 5989857Sobrien * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 6089857Sobrien * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 6189857Sobrien * SUCH DAMAGE. 6289857Sobrien */ 6389857Sobrien 6489857Sobrien#include <sys/param.h> 65130561Sobrien#include <sys/socket.h> 6689857Sobrien#include <sys/time.h> 6760484Sobrien 6833965Sjdp#include <ctype.h> 69130561Sobrien#include <err.h> 70130561Sobrien#include <errno.h> 7133965Sjdp#include <locale.h> 7233965Sjdp#include <netdb.h> 7333965Sjdp#include <stdarg.h> 7433965Sjdp#include <stdio.h> 7533965Sjdp#include <stdlib.h> 76130561Sobrien#include <string.h> 77130561Sobrien#include <time.h> 7833965Sjdp#include <unistd.h> 7933965Sjdp#include <md5.h> 8033965Sjdp 8133965Sjdp#include <netinet/in.h> 8260484Sobrien#include <netinet/tcp.h> 83130561Sobrien 84130561Sobrien#include "fetch.h" 85130561Sobrien#include "common.h" 86130561Sobrien#include "httperr.h" 87130561Sobrien 8833965Sjdp/* Maximum number of redirects to follow */ 8933965Sjdp#define MAX_REDIRECT 5 90104834Sobrien 9133965Sjdp/* Symbolic names for reply codes we care about */ 9233965Sjdp#define HTTP_OK 200 9333965Sjdp#define HTTP_PARTIAL 206 9433965Sjdp#define HTTP_MOVED_PERM 301 9560484Sobrien#define HTTP_MOVED_TEMP 302 96130561Sobrien#define HTTP_SEE_OTHER 303 97130561Sobrien#define HTTP_NOT_MODIFIED 304 9833965Sjdp#define HTTP_TEMP_REDIRECT 307 9933965Sjdp#define HTTP_NEED_AUTH 401 10060484Sobrien#define HTTP_NEED_PROXY_AUTH 407 10133965Sjdp#define HTTP_BAD_RANGE 416 10233965Sjdp#define HTTP_PROTOCOL_ERROR 999 10360484Sobrien 10460484Sobrien#define HTTP_REDIRECT(xyz) ((xyz) == HTTP_MOVED_PERM \ 10560484Sobrien || (xyz) == HTTP_MOVED_TEMP \ 10660484Sobrien || (xyz) == HTTP_TEMP_REDIRECT \ 10760484Sobrien || (xyz) == HTTP_SEE_OTHER) 10860484Sobrien 10960484Sobrien#define HTTP_ERROR(xyz) ((xyz) > 400 && (xyz) < 599) 11060484Sobrien 11133965Sjdp 11233965Sjdp/***************************************************************************** 11333965Sjdp * I/O functions for decoding chunked streams 114130561Sobrien */ 115130561Sobrien 116130561Sobrienstruct httpio 117130561Sobrien{ 118130561Sobrien conn_t *conn; /* connection */ 119130561Sobrien int chunked; /* chunked mode */ 120130561Sobrien char *buf; /* chunk buffer */ 121130561Sobrien size_t bufsize; /* size of chunk buffer */ 122130561Sobrien ssize_t buflen; /* amount of data currently in buffer */ 123130561Sobrien int bufpos; /* current read offset in buffer */ 124130561Sobrien int eof; /* end-of-file flag */ 12533965Sjdp int error; /* error flag */ 12633965Sjdp size_t chunksize; /* remaining size of current chunk */ 12760484Sobrien#ifndef NDEBUG 12889857Sobrien size_t total; 129130561Sobrien#endif 130130561Sobrien}; 13189857Sobrien 132130561Sobrien/* 133130561Sobrien * Get next chunk header 13433965Sjdp */ 13560484Sobrienstatic int 13660484Sobrienhttp_new_chunk(struct httpio *io) 137130561Sobrien{ 13833965Sjdp char *p; 13933965Sjdp 14060484Sobrien if (fetch_getln(io->conn) == -1) 14160484Sobrien return (-1); 14233965Sjdp 14333965Sjdp if (io->conn->buflen < 2 || !isxdigit((unsigned char)*io->conn->buf)) 144130561Sobrien return (-1); 14533965Sjdp 14633965Sjdp for (p = io->conn->buf; *p && !isspace((unsigned char)*p); ++p) { 14733965Sjdp if (*p == ';') 148130561Sobrien break; 14933965Sjdp if (!isxdigit((unsigned char)*p)) 15033965Sjdp return (-1); 151218822Sdim if (isdigit((unsigned char)*p)) { 152218822Sdim io->chunksize = io->chunksize * 16 + 15389857Sobrien *p - '0'; 154130561Sobrien } else { 155130561Sobrien io->chunksize = io->chunksize * 16 + 156130561Sobrien 10 + tolower((unsigned char)*p) - 'a'; 157130561Sobrien } 15833965Sjdp } 15933965Sjdp 16033965Sjdp#ifndef NDEBUG 16133965Sjdp if (fetchDebug) { 16233965Sjdp io->total += io->chunksize; 16333965Sjdp if (io->chunksize == 0) 16433965Sjdp fprintf(stderr, "%s(): end of last chunk\n", __func__); 16533965Sjdp else 16633965Sjdp fprintf(stderr, "%s(): new chunk: %lu (%lu)\n", 16733965Sjdp __func__, (unsigned long)io->chunksize, 16833965Sjdp (unsigned long)io->total); 16933965Sjdp } 17033965Sjdp#endif 17133965Sjdp 17233965Sjdp return (io->chunksize); 17333965Sjdp} 17433965Sjdp 17589857Sobrien/* 17633965Sjdp * Grow the input buffer to at least len bytes 17733965Sjdp */ 178130561Sobrienstatic inline int 179130561Sobrienhttp_growbuf(struct httpio *io, size_t len) 180130561Sobrien{ 181130561Sobrien char *tmp; 18233965Sjdp 183130561Sobrien if (io->bufsize >= len) 18433965Sjdp return (0); 18533965Sjdp 186130561Sobrien if ((tmp = realloc(io->buf, len)) == NULL) 18733965Sjdp return (-1); 18833965Sjdp io->buf = tmp; 189130561Sobrien io->bufsize = len; 19033965Sjdp return (0); 191130561Sobrien} 192130561Sobrien 193130561Sobrien/* 194218822Sdim * Fill the input buffer, do chunk decoding on the fly 195218822Sdim */ 196218822Sdimstatic int 19778828Sobrienhttp_fillbuf(struct httpio *io, size_t len) 19878828Sobrien{ 19938889Sjdp if (io->error) 200218822Sdim return (-1); 20138889Sjdp if (io->eof) 20238889Sjdp return (0); 203218822Sdim 20478828Sobrien if (io->chunked == 0) { 20538889Sjdp if (http_growbuf(io, len) == -1) 20660484Sobrien return (-1); 20738889Sjdp if ((io->buflen = fetch_read(io->conn, io->buf, len)) == -1) { 208130561Sobrien io->error = 1; 209130561Sobrien return (-1); 21038889Sjdp } 211218822Sdim io->bufpos = 0; 212218822Sdim return (io->buflen); 213218822Sdim } 214130561Sobrien 215130561Sobrien if (io->chunksize == 0) { 216130561Sobrien switch (http_new_chunk(io)) { 217130561Sobrien case -1: 218130561Sobrien io->error = 1; 219218822Sdim return (-1); 220218822Sdim case 0: 221218822Sdim io->eof = 1; 222218822Sdim return (0); 223218822Sdim } 224218822Sdim } 225218822Sdim 226218822Sdim if (len > io->chunksize) 22733965Sjdp len = io->chunksize; 228130561Sobrien if (http_growbuf(io, len) == -1) 229130561Sobrien return (-1); 230130561Sobrien if ((io->buflen = fetch_read(io->conn, io->buf, len)) == -1) { 231130561Sobrien io->error = 1; 232130561Sobrien return (-1); 233130561Sobrien } 234130561Sobrien io->chunksize -= io->buflen; 235130561Sobrien 236130561Sobrien if (io->chunksize == 0) { 237130561Sobrien char endl[2]; 238130561Sobrien 239130561Sobrien if (fetch_read(io->conn, endl, 2) != 2 || 240130561Sobrien endl[0] != '\r' || endl[1] != '\n') 241130561Sobrien return (-1); 242130561Sobrien } 243130561Sobrien 244130561Sobrien io->bufpos = 0; 245130561Sobrien 246130561Sobrien return (io->buflen); 247130561Sobrien} 248130561Sobrien 249130561Sobrien/* 250130561Sobrien * Read function 251130561Sobrien */ 252218822Sdimstatic int 253218822Sdimhttp_readfn(void *v, char *buf, int len) 254130561Sobrien{ 255218822Sdim struct httpio *io = (struct httpio *)v; 256130561Sobrien int l, pos; 257218822Sdim 258218822Sdim if (io->error) 259130561Sobrien return (-1); 260130561Sobrien if (io->eof) 261130561Sobrien return (0); 262130561Sobrien 263130561Sobrien for (pos = 0; len > 0; pos += l, len -= l) { 264130561Sobrien /* empty buffer */ 265130561Sobrien if (!io->buf || io->bufpos == io->buflen) 266130561Sobrien if (http_fillbuf(io, len) < 1) 267130561Sobrien break; 268130561Sobrien l = io->buflen - io->bufpos; 269218822Sdim if (len < l) 270130561Sobrien l = len; 271130561Sobrien memcpy(buf + pos, io->buf + io->bufpos, l); 272130561Sobrien io->bufpos += l; 273218822Sdim } 274218822Sdim 275218822Sdim if (!pos && io->error) 276130561Sobrien return (-1); 27733965Sjdp return (pos); 27833965Sjdp} 27933965Sjdp 28033965Sjdp/* 28133965Sjdp * Write function 28233965Sjdp */ 28333965Sjdpstatic int 28433965Sjdphttp_writefn(void *v, const char *buf, int len) 28533965Sjdp{ 286130561Sobrien struct httpio *io = (struct httpio *)v; 28733965Sjdp 28833965Sjdp return (fetch_write(io->conn, buf, len)); 289218822Sdim} 29033965Sjdp 291130561Sobrien/* 29233965Sjdp * Close function 29333965Sjdp */ 29480016Sobrienstatic int 29533965Sjdphttp_closefn(void *v) 29633965Sjdp{ 29733965Sjdp struct httpio *io = (struct httpio *)v; 29833965Sjdp int r; 29933965Sjdp 30033965Sjdp r = fetch_close(io->conn); 30133965Sjdp if (io->buf) 30233965Sjdp free(io->buf); 30333965Sjdp free(io); 304130561Sobrien return (r); 30533965Sjdp} 30633965Sjdp 30733965Sjdp/* 30833965Sjdp * Wrap a file descriptor up 30933965Sjdp */ 31033965Sjdpstatic FILE * 31133965Sjdphttp_funopen(conn_t *conn, int chunked) 312130561Sobrien{ 31333965Sjdp struct httpio *io; 31460484Sobrien FILE *f; 31560484Sobrien 31660484Sobrien if ((io = calloc(1, sizeof(*io))) == NULL) { 31760484Sobrien fetch_syserr(); 318130561Sobrien return (NULL); 31989857Sobrien } 32033965Sjdp io->conn = conn; 32160484Sobrien io->chunked = chunked; 32233965Sjdp f = funopen(io, http_readfn, http_writefn, NULL, http_closefn); 32360484Sobrien if (f == NULL) { 32460484Sobrien fetch_syserr(); 32560484Sobrien free(io); 32660484Sobrien return (NULL); 32760484Sobrien } 32833965Sjdp return (f); 32933965Sjdp} 33033965Sjdp 331218822Sdim 33233965Sjdp/***************************************************************************** 33333965Sjdp * Helper functions for talking to the server and parsing its replies 334218822Sdim */ 335218822Sdim 33633965Sjdp/* Header types */ 337130561Sobrientypedef enum { 338130561Sobrien hdr_syserror = -2, 33933965Sjdp hdr_error = -1, 34033965Sjdp hdr_end = 0, 34133965Sjdp hdr_unknown = 1, 342218822Sdim hdr_content_length, 343130561Sobrien hdr_content_range, 344130561Sobrien hdr_last_modified, 34533965Sjdp hdr_location, 346130561Sobrien hdr_transfer_encoding, 347218822Sdim hdr_www_authenticate, 348130561Sobrien hdr_proxy_authenticate, 349130561Sobrien} hdr_t; 35060484Sobrien 35160484Sobrien/* Names of interesting headers */ 352130561Sobrienstatic struct { 353130561Sobrien hdr_t num; 35433965Sjdp const char *name; 35533965Sjdp} hdr_names[] = { 35633965Sjdp { hdr_content_length, "Content-Length" }, 357130561Sobrien { hdr_content_range, "Content-Range" }, 358130561Sobrien { hdr_last_modified, "Last-Modified" }, 359130561Sobrien { hdr_location, "Location" }, 36033965Sjdp { hdr_transfer_encoding, "Transfer-Encoding" }, 361130561Sobrien { hdr_www_authenticate, "WWW-Authenticate" }, 362130561Sobrien { hdr_proxy_authenticate, "Proxy-Authenticate" }, 363130561Sobrien { hdr_unknown, NULL }, 364130561Sobrien}; 36533965Sjdp 36633965Sjdp/* 36789857Sobrien * Send a formatted line; optionally echo to terminal 368218822Sdim */ 36933965Sjdpstatic int 37033965Sjdphttp_cmd(conn_t *conn, const char *fmt, ...) 371130561Sobrien{ 372130561Sobrien va_list ap; 37333965Sjdp size_t len; 37433965Sjdp char *msg; 37533965Sjdp int r; 376218822Sdim 377218822Sdim va_start(ap, fmt); 37833965Sjdp len = vasprintf(&msg, fmt, ap); 379130561Sobrien va_end(ap); 38033965Sjdp 38133965Sjdp if (msg == NULL) { 38233965Sjdp errno = ENOMEM; 38333965Sjdp fetch_syserr(); 38438889Sjdp return (-1); 38578828Sobrien } 386130561Sobrien 387130561Sobrien r = fetch_putln(conn, msg, len); 38833965Sjdp free(msg); 38933965Sjdp 39033965Sjdp if (r == -1) { 39133965Sjdp fetch_syserr(); 39233965Sjdp return (-1); 39333965Sjdp } 39433965Sjdp 39533965Sjdp return (0); 396104834Sobrien} 39733965Sjdp 39833965Sjdp/* 39977298Sobrien * Get and parse status line 40077298Sobrien */ 40177298Sobrienstatic int 40233965Sjdphttp_get_reply(conn_t *conn) 40377298Sobrien{ 40477298Sobrien char *p; 40577298Sobrien 406130561Sobrien if (fetch_getln(conn) == -1) 40777298Sobrien return (-1); 408130561Sobrien /* 409130561Sobrien * A valid status line looks like "HTTP/m.n xyz reason" where m 410130561Sobrien * and n are the major and minor protocol version numbers and xyz 411130561Sobrien * is the reply code. 41289857Sobrien * Unfortunately, there are servers out there (NCSA 1.5.1, to name 413130561Sobrien * just one) that do not send a version number, so we can't rely 414130561Sobrien * on finding one, but if we do, insist on it being 1.0 or 1.1. 415218822Sdim * We don't care about the reason phrase. 416130561Sobrien */ 417130561Sobrien if (strncmp(conn->buf, "HTTP", 4) != 0) 418130561Sobrien return (HTTP_PROTOCOL_ERROR); 419130561Sobrien p = conn->buf + 4; 420130561Sobrien if (*p == '/') { 421130561Sobrien if (p[1] != '1' || p[2] != '.' || (p[3] != '0' && p[3] != '1')) 42289857Sobrien return (HTTP_PROTOCOL_ERROR); 42333965Sjdp p += 4; 424130561Sobrien } 42533965Sjdp if (*p != ' ' || 42689857Sobrien !isdigit((unsigned char)p[1]) || 42789857Sobrien !isdigit((unsigned char)p[2]) || 42889857Sobrien !isdigit((unsigned char)p[3])) 42960484Sobrien return (HTTP_PROTOCOL_ERROR); 43060484Sobrien 43160484Sobrien conn->err = (p[1] - '0') * 100 + (p[2] - '0') * 10 + (p[3] - '0'); 43289857Sobrien return (conn->err); 43360484Sobrien} 43460484Sobrien 43560484Sobrien/* 43660484Sobrien * Check a header; if the type matches the given string, return a pointer 437130561Sobrien * to the beginning of the value. 43860484Sobrien */ 43960484Sobrienstatic const char * 440130561Sobrienhttp_match(const char *str, const char *hdr) 44160484Sobrien{ 44260484Sobrien while (*str && *hdr && 443218822Sdim tolower((unsigned char)*str++) == tolower((unsigned char)*hdr++)) 444218822Sdim /* nothing */; 445218822Sdim if (*str || *hdr != ':') 446130561Sobrien return (NULL); 447218822Sdim while (*hdr && isspace((unsigned char)*++hdr)) 448218822Sdim /* nothing */; 449218822Sdim return (hdr); 450218822Sdim} 45160484Sobrien 452218822Sdim 45378828Sobrien/* 45460484Sobrien * Get the next header and return the appropriate symbolic code. We 45560484Sobrien * need to read one line ahead for checking for a continuation line 456218822Sdim * belonging to the current header (continuation lines start with 45760484Sobrien * white space). 45860484Sobrien * 45960484Sobrien * We get called with a fresh line already in the conn buffer, either 46060484Sobrien * from the previous http_next_header() invocation, or, the first 46160484Sobrien * time, from a fetch_getln() performed by our caller. 46260484Sobrien * 46360484Sobrien * This stops when we encounter an empty line (we dont read beyond the header 46460484Sobrien * area). 46560484Sobrien * 46660484Sobrien * Note that the "headerbuf" is just a place to return the result. Its 46760484Sobrien * contents are not used for the next call. This means that no cleanup 46860484Sobrien * is needed when ie doing another connection, just call the cleanup when 46960484Sobrien * fully done to deallocate memory. 47060484Sobrien */ 47160484Sobrien 47260484Sobrien/* Limit the max number of continuation lines to some reasonable value */ 47360484Sobrien#define HTTP_MAX_CONT_LINES 10 47460484Sobrien 47560484Sobrien/* Place into which to build a header from one or several lines */ 47660484Sobrientypedef struct { 47760484Sobrien char *buf; /* buffer */ 47860484Sobrien size_t bufsize; /* buffer size */ 47989857Sobrien size_t buflen; /* length of buffer contents */ 48060484Sobrien} http_headerbuf_t; 48160484Sobrien 482218822Sdimstatic void 48360484Sobrieninit_http_headerbuf(http_headerbuf_t *buf) 484130561Sobrien{ 485130561Sobrien buf->buf = NULL; 48677298Sobrien buf->bufsize = 0; 48777298Sobrien buf->buflen = 0; 48878828Sobrien} 489218822Sdim 490218822Sdimstatic void 491218822Sdimclean_http_headerbuf(http_headerbuf_t *buf) 49278828Sobrien{ 49378828Sobrien if (buf->buf) 494218822Sdim free(buf->buf); 49578828Sobrien init_http_headerbuf(buf); 49678828Sobrien} 497218822Sdim 498130561Sobrien/* Remove whitespace at the end of the buffer */ 499130561Sobrienstatic void 500130561Sobrienhttp_conn_trimright(conn_t *conn) 501130561Sobrien{ 502130561Sobrien while (conn->buflen && 503130561Sobrien isspace((unsigned char)conn->buf[conn->buflen - 1])) 504130561Sobrien conn->buflen--; 505130561Sobrien conn->buf[conn->buflen] = '\0'; 506130561Sobrien} 50760484Sobrien 508218822Sdimstatic hdr_t 50960484Sobrienhttp_next_header(conn_t *conn, http_headerbuf_t *hbuf, const char **p) 51060484Sobrien{ 511130561Sobrien unsigned int i, len; 51260484Sobrien 51333965Sjdp /* 514218822Sdim * Have to do the stripping here because of the first line. So 51560484Sobrien * it's done twice for the subsequent lines. No big deal 51633965Sjdp */ 51733965Sjdp http_conn_trimright(conn); 51833965Sjdp if (conn->buflen == 0) 51933965Sjdp return (hdr_end); 520130561Sobrien 52133965Sjdp /* Copy the line to the headerbuf */ 52289857Sobrien if (hbuf->bufsize < conn->buflen + 1) { 52389857Sobrien if ((hbuf->buf = realloc(hbuf->buf, conn->buflen + 1)) == NULL) 52489857Sobrien return (hdr_syserror); 52560484Sobrien hbuf->bufsize = conn->buflen + 1; 52689857Sobrien } 52789857Sobrien strcpy(hbuf->buf, conn->buf); 52889857Sobrien hbuf->buflen = conn->buflen; 52960484Sobrien 53089857Sobrien /* 53160484Sobrien * Fetch possible continuation lines. Stop at 1st non-continuation 532130561Sobrien * and leave it in the conn buffer 53360484Sobrien */ 534130561Sobrien for (i = 0; i < HTTP_MAX_CONT_LINES; i++) { 53589857Sobrien if (fetch_getln(conn) == -1) 536218822Sdim return (hdr_syserror); 537218822Sdim 538218822Sdim /* 53960484Sobrien * Note: we carry on the idea from the previous version 54060484Sobrien * that a pure whitespace line is equivalent to an empty 54160484Sobrien * one (so it's not continuation and will be handled when 54260484Sobrien * we are called next) 54360484Sobrien */ 544130561Sobrien http_conn_trimright(conn); 54560484Sobrien if (conn->buf[0] != ' ' && conn->buf[0] != "\t"[0]) 54660484Sobrien break; 54760484Sobrien 54833965Sjdp /* Got a continuation line. Concatenate to previous */ 549218822Sdim len = hbuf->buflen + conn->buflen; 55060484Sobrien if (hbuf->bufsize < len + 1) { 55133965Sjdp len *= 2; 55233965Sjdp if ((hbuf->buf = realloc(hbuf->buf, len + 1)) == NULL) 55333965Sjdp return (hdr_syserror); 55433965Sjdp hbuf->bufsize = len + 1; 55533965Sjdp } 55633965Sjdp strcpy(hbuf->buf + hbuf->buflen, conn->buf); 55733965Sjdp hbuf->buflen += conn->buflen; 558130561Sobrien } 55933965Sjdp 56033965Sjdp /* 56133965Sjdp * We could check for malformed headers but we don't really care. 56233965Sjdp * A valid header starts with a token immediately followed by a 56333965Sjdp * colon; a token is any sequence of non-control, non-whitespace 56433965Sjdp * characters except "()<>@,;:\\\"{}". 56533965Sjdp */ 56633965Sjdp for (i = 0; hdr_names[i].num != hdr_unknown; i++) 56733965Sjdp if ((*p = http_match(hdr_names[i].name, hbuf->buf)) != NULL) 56833965Sjdp return (hdr_names[i].num); 56933965Sjdp 57033965Sjdp return (hdr_unknown); 57133965Sjdp} 57233965Sjdp 57333965Sjdp/************************** 57433965Sjdp * [Proxy-]Authenticate header parsing 57533965Sjdp */ 57633965Sjdp 57738889Sjdp/* 57838889Sjdp * Read doublequote-delimited string into output buffer obuf (allocated 57938889Sjdp * by caller, whose responsibility it is to ensure that it's big enough) 58033965Sjdp * cp points to the first char after the initial '"' 58133965Sjdp * Handles \ quoting 58260484Sobrien * Returns pointer to the first char after the terminating double quote, or 58333965Sjdp * NULL for error. 58460484Sobrien */ 58533965Sjdpstatic const char * 58633965Sjdphttp_parse_headerstring(const char *cp, char *obuf) 58733965Sjdp{ 588218822Sdim for (;;) { 58938889Sjdp switch (*cp) { 59033965Sjdp case 0: /* Unterminated string */ 59138889Sjdp *obuf = 0; 59238889Sjdp return (NULL); 59338889Sjdp case '"': /* Ending quote */ 59433965Sjdp *obuf = 0; 59538889Sjdp return (++cp); 59638889Sjdp case '\\': 59738889Sjdp if (*++cp == 0) { 59860484Sobrien *obuf = 0; 59960484Sobrien return (NULL); 60060484Sobrien } 60138889Sjdp /* FALLTHROUGH */ 60238889Sjdp default: 60333965Sjdp *obuf++ = *cp++; 60433965Sjdp } 60533965Sjdp } 60633965Sjdp} 60733965Sjdp 60833965Sjdp/* Http auth challenge schemes */ 60933965Sjdptypedef enum {HTTPAS_UNKNOWN, HTTPAS_BASIC,HTTPAS_DIGEST} http_auth_schemes_t; 61060484Sobrien 61133965Sjdp/* Data holder for a Basic or Digest challenge. */ 61233965Sjdptypedef struct { 613130561Sobrien http_auth_schemes_t scheme; 61433965Sjdp char *realm; 615130561Sobrien char *qop; 61633965Sjdp char *nonce; 61760484Sobrien char *opaque; 61833965Sjdp char *algo; 61933965Sjdp int stale; 62033965Sjdp int nc; /* Nonce count */ 62133965Sjdp} http_auth_challenge_t; 62233965Sjdp 62333965Sjdpstatic void 624130561Sobrieninit_http_auth_challenge(http_auth_challenge_t *b) 62533965Sjdp{ 626130561Sobrien b->scheme = HTTPAS_UNKNOWN; 627130561Sobrien b->realm = b->qop = b->nonce = b->opaque = b->algo = NULL; 628130561Sobrien b->stale = b->nc = 0; 62960484Sobrien} 63060484Sobrien 63160484Sobrienstatic void 63260484Sobrienclean_http_auth_challenge(http_auth_challenge_t *b) 633130561Sobrien{ 63433965Sjdp if (b->realm) 63533965Sjdp free(b->realm); 63660484Sobrien if (b->qop) 63760484Sobrien free(b->qop); 63833965Sjdp if (b->nonce) 63933965Sjdp free(b->nonce); 64033965Sjdp if (b->opaque) 64133965Sjdp free(b->opaque); 64233965Sjdp if (b->algo) 64333965Sjdp free(b->algo); 64460484Sobrien init_http_auth_challenge(b); 645130561Sobrien} 64633965Sjdp 64733965Sjdp/* Data holder for an array of challenges offered in an http response. */ 64833965Sjdp#define MAX_CHALLENGES 10 649130561Sobrientypedef struct { 65033965Sjdp http_auth_challenge_t *challenges[MAX_CHALLENGES]; 65138889Sjdp int count; /* Number of parsed challenges in the array */ 65238889Sjdp int valid; /* We did parse an authenticate header */ 65333965Sjdp} http_auth_challenges_t; 65433965Sjdp 655104834Sobrienstatic void 65678828Sobrieninit_http_auth_challenges(http_auth_challenges_t *cs) 65778828Sobrien{ 65878828Sobrien int i; 65978828Sobrien for (i = 0; i < MAX_CHALLENGES; i++) 66078828Sobrien cs->challenges[i] = NULL; 661130561Sobrien cs->count = cs->valid = 0; 66278828Sobrien} 663130561Sobrien 66478828Sobrienstatic void 66578828Sobrienclean_http_auth_challenges(http_auth_challenges_t *cs) 66678828Sobrien{ 66778828Sobrien int i; 668104834Sobrien /* We rely on non-zero pointers being allocated, not on the count */ 669130561Sobrien for (i = 0; i < MAX_CHALLENGES; i++) { 670130561Sobrien if (cs->challenges[i] != NULL) { 671218822Sdim clean_http_auth_challenge(cs->challenges[i]); 672218822Sdim free(cs->challenges[i]); 673218822Sdim } 674218822Sdim } 67578828Sobrien init_http_auth_challenges(cs); 676130561Sobrien} 67778828Sobrien 67878828Sobrien/* 679130561Sobrien * Enumeration for lexical elements. Separators will be returned as their own 68078828Sobrien * ascii value 681130561Sobrien */ 68278828Sobrientypedef enum {HTTPHL_WORD=256, HTTPHL_STRING=257, HTTPHL_END=258, 68378828Sobrien HTTPHL_ERROR = 259} http_header_lex_t; 68478828Sobrien 685130561Sobrien/* 686130561Sobrien * Determine what kind of token comes next and return possible value 68778828Sobrien * in buf, which is supposed to have been allocated big enough by 68878828Sobrien * caller. Advance input pointer and return element type. 689104834Sobrien */ 69078828Sobrienstatic int 69178828Sobrienhttp_header_lex(const char **cpp, char *buf) 69278828Sobrien{ 69378828Sobrien size_t l; 69478828Sobrien /* Eat initial whitespace */ 695130561Sobrien *cpp += strspn(*cpp, " \t"); 69678828Sobrien if (**cpp == 0) 69778828Sobrien return (HTTPHL_END); 69878828Sobrien 69978828Sobrien /* Separator ? */ 70078828Sobrien if (**cpp == ',' || **cpp == '=') 70178828Sobrien return (*((*cpp)++)); 70278828Sobrien 70378828Sobrien /* String ? */ 70478828Sobrien if (**cpp == '"') { 70578828Sobrien *cpp = http_parse_headerstring(++*cpp, buf); 706130561Sobrien if (*cpp == NULL) 70778828Sobrien return (HTTPHL_ERROR); 708104834Sobrien return (HTTPHL_STRING); 70978828Sobrien } 71078828Sobrien 71178828Sobrien /* Read other token, until separator or whitespace */ 71278828Sobrien l = strcspn(*cpp, " \t,="); 71378828Sobrien memcpy(buf, *cpp, l); 714130561Sobrien buf[l] = 0; 71578828Sobrien *cpp += l; 716104834Sobrien return (HTTPHL_WORD); 71778828Sobrien} 718130561Sobrien 71978828Sobrien/* 720104834Sobrien * Read challenges from http xxx-authenticate header and accumulate them 72178828Sobrien * in the challenges list structure. 72278828Sobrien * 72378828Sobrien * Headers with multiple challenges are specified by rfc2617, but 72478828Sobrien * servers (ie: squid) often send them in separate headers instead, 72578828Sobrien * which in turn is forbidden by the http spec (multiple headers with 72678828Sobrien * the same name are only allowed for pure comma-separated lists, see 727104834Sobrien * rfc2616 sec 4.2). 72878828Sobrien * 72978828Sobrien * We support both approaches anyway 73078828Sobrien */ 73178828Sobrienstatic int 73278828Sobrienhttp_parse_authenticate(const char *cp, http_auth_challenges_t *cs) 73378828Sobrien{ 73478828Sobrien int ret = -1; 73578828Sobrien http_header_lex_t lex; 73678828Sobrien char *key = malloc(strlen(cp) + 1); 73778828Sobrien char *value = malloc(strlen(cp) + 1); 73878828Sobrien char *buf = malloc(strlen(cp) + 1); 73978828Sobrien 74078828Sobrien if (key == NULL || value == NULL || buf == NULL) { 74178828Sobrien fetch_syserr(); 74278828Sobrien goto out; 74378828Sobrien } 744104834Sobrien 745104834Sobrien /* In any case we've seen the header and we set the valid bit */ 74678828Sobrien cs->valid = 1; 74778828Sobrien 74878828Sobrien /* Need word first */ 74978828Sobrien lex = http_header_lex(&cp, key); 75078828Sobrien if (lex != HTTPHL_WORD) 75178828Sobrien goto out; 75278828Sobrien 75378828Sobrien /* Loop on challenges */ 75478828Sobrien for (; cs->count < MAX_CHALLENGES; cs->count++) { 755218822Sdim cs->challenges[cs->count] = 756218822Sdim malloc(sizeof(http_auth_challenge_t)); 75778828Sobrien if (cs->challenges[cs->count] == NULL) { 758104834Sobrien fetch_syserr(); 75978828Sobrien goto out; 76078828Sobrien } 76178828Sobrien init_http_auth_challenge(cs->challenges[cs->count]); 76278828Sobrien if (!strcasecmp(key, "basic")) { 76378828Sobrien cs->challenges[cs->count]->scheme = HTTPAS_BASIC; 76478828Sobrien } else if (!strcasecmp(key, "digest")) { 76578828Sobrien cs->challenges[cs->count]->scheme = HTTPAS_DIGEST; 76678828Sobrien } else { 76778828Sobrien cs->challenges[cs->count]->scheme = HTTPAS_UNKNOWN; 76878828Sobrien /* 76978828Sobrien * Continue parsing as basic or digest may 77078828Sobrien * follow, and the syntax is the same for 77133965Sjdp * all. We'll just ignore this one when 77233965Sjdp * looking at the list 77333965Sjdp */ 774130561Sobrien } 775130561Sobrien 77633965Sjdp /* Loop on attributes */ 77733965Sjdp for (;;) { 77833965Sjdp /* Key */ 779130561Sobrien lex = http_header_lex(&cp, key); 780130561Sobrien if (lex != HTTPHL_WORD) 781130561Sobrien goto out; 782130561Sobrien 783130561Sobrien /* Equal sign */ 784130561Sobrien lex = http_header_lex(&cp, buf); 785130561Sobrien if (lex != '=') 786130561Sobrien goto out; 787130561Sobrien 788130561Sobrien /* Value */ 789130561Sobrien lex = http_header_lex(&cp, value); 790130561Sobrien if (lex != HTTPHL_WORD && lex != HTTPHL_STRING) 791130561Sobrien goto out; 792130561Sobrien 793130561Sobrien if (!strcasecmp(key, "realm")) 794130561Sobrien cs->challenges[cs->count]->realm = 795130561Sobrien strdup(value); 796130561Sobrien else if (!strcasecmp(key, "qop")) 797130561Sobrien cs->challenges[cs->count]->qop = 798130561Sobrien strdup(value); 79989857Sobrien else if (!strcasecmp(key, "nonce")) 800130561Sobrien cs->challenges[cs->count]->nonce = 80133965Sjdp strdup(value); 80233965Sjdp else if (!strcasecmp(key, "opaque")) 803218822Sdim cs->challenges[cs->count]->opaque = 804218822Sdim strdup(value); 805218822Sdim else if (!strcasecmp(key, "algorithm")) 806218822Sdim cs->challenges[cs->count]->algo = 807218822Sdim strdup(value); 808218822Sdim else if (!strcasecmp(key, "stale")) 809218822Sdim cs->challenges[cs->count]->stale = 810218822Sdim strcasecmp(value, "no"); 811218822Sdim /* Else ignore unknown attributes */ 812218822Sdim 813218822Sdim /* Comma or Next challenge or End */ 814218822Sdim lex = http_header_lex(&cp, key); 815218822Sdim /* 816218822Sdim * If we get a word here, this is the beginning of the 817218822Sdim * next challenge. Break the attributes loop 818218822Sdim */ 819218822Sdim if (lex == HTTPHL_WORD) 820218822Sdim break; 821218822Sdim 822218822Sdim if (lex == HTTPHL_END) { 823218822Sdim /* End while looking for ',' is normal exit */ 824218822Sdim cs->count++; 825218822Sdim ret = 0; 826218822Sdim goto out; 82733965Sjdp } 82833965Sjdp /* Anything else is an error */ 829130561Sobrien if (lex != ',') 830130561Sobrien goto out; 83133965Sjdp 832130561Sobrien } /* End attributes loop */ 833130561Sobrien } /* End challenge loop */ 834130561Sobrien 83533965Sjdp /* 836130561Sobrien * Challenges max count exceeded. This really can't happen 837130561Sobrien * with normal data, something's fishy -> error 838130561Sobrien */ 839130561Sobrien 840130561Sobrienout: 841130561Sobrien if (key) 842130561Sobrien free(key); 843130561Sobrien if (value) 844130561Sobrien free(value); 845130561Sobrien if (buf) 846130561Sobrien free(buf); 84760484Sobrien return (ret); 84860484Sobrien} 84960484Sobrien 850130561Sobrien 851130561Sobrien/* 85233965Sjdp * Parse a last-modified header 853130561Sobrien */ 854130561Sobrienstatic int 855130561Sobrienhttp_parse_mtime(const char *p, time_t *mtime) 85660484Sobrien{ 857218822Sdim char locale[64], *r; 858218822Sdim struct tm tm; 859218822Sdim 860218822Sdim strncpy(locale, setlocale(LC_TIME, NULL), sizeof(locale)); 861218822Sdim setlocale(LC_TIME, "C"); 862218822Sdim r = strptime(p, "%a, %d %b %Y %H:%M:%S GMT", &tm); 863218822Sdim /* XXX should add support for date-2 and date-3 */ 864218822Sdim setlocale(LC_TIME, locale); 865218822Sdim if (r == NULL) 866218822Sdim return (-1); 867218822Sdim DEBUG(fprintf(stderr, "last modified: [%04d-%02d-%02d " 868218822Sdim "%02d:%02d:%02d]\n", 869218822Sdim tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 870218822Sdim tm.tm_hour, tm.tm_min, tm.tm_sec)); 871218822Sdim *mtime = timegm(&tm); 872218822Sdim return (0); 873218822Sdim} 874218822Sdim 875218822Sdim/* 876218822Sdim * Parse a content-length header 877218822Sdim */ 878218822Sdimstatic int 879218822Sdimhttp_parse_length(const char *p, off_t *length) 880218822Sdim{ 881218822Sdim off_t len; 882130561Sobrien 88333965Sjdp for (len = 0; *p && isdigit((unsigned char)*p); ++p) 88433965Sjdp len = len * 10 + (*p - '0'); 885218822Sdim if (*p) 886218822Sdim return (-1); 887218822Sdim DEBUG(fprintf(stderr, "content length: [%lld]\n", 888218822Sdim (long long)len)); 889218822Sdim *length = len; 890218822Sdim return (0); 891218822Sdim} 892218822Sdim 893218822Sdim/* 894218822Sdim * Parse a content-range header 895218822Sdim */ 896218822Sdimstatic int 897218822Sdimhttp_parse_range(const char *p, off_t *offset, off_t *length, off_t *size) 898218822Sdim{ 899218822Sdim off_t first, last, len; 900218822Sdim 901218822Sdim if (strncasecmp(p, "bytes ", 6) != 0) 902218822Sdim return (-1); 90333965Sjdp p += 6; 90433965Sjdp if (*p == '*') { 90533965Sjdp first = last = -1; 90633965Sjdp ++p; 90733965Sjdp } else { 908130561Sobrien for (first = 0; *p && isdigit((unsigned char)*p); ++p) 909130561Sobrien first = first * 10 + *p - '0'; 91033965Sjdp if (*p != '-') 911130561Sobrien return (-1); 91233965Sjdp for (last = 0, ++p; *p && isdigit((unsigned char)*p); ++p) 913218822Sdim last = last * 10 + *p - '0'; 91433965Sjdp } 91533965Sjdp if (first > last || *p != '/') 91633965Sjdp return (-1); 91733965Sjdp for (len = 0, ++p; *p && isdigit((unsigned char)*p); ++p) 91833965Sjdp len = len * 10 + *p - '0'; 919130561Sobrien if (*p || len < last - first + 1) 920218822Sdim return (-1); 921218822Sdim if (first == -1) { 922130561Sobrien DEBUG(fprintf(stderr, "content range: [*/%lld]\n", 923130561Sobrien (long long)len)); 924130561Sobrien *length = 0; 92533965Sjdp } else { 926130561Sobrien DEBUG(fprintf(stderr, "content range: [%lld-%lld/%lld]\n", 927130561Sobrien (long long)first, (long long)last, (long long)len)); 92860484Sobrien *length = last - first + 1; 92960484Sobrien } 930130561Sobrien *offset = first; 93160484Sobrien *size = len; 932130561Sobrien return (0); 933130561Sobrien} 934130561Sobrien 935130561Sobrien 93660484Sobrien/***************************************************************************** 93760484Sobrien * Helper functions for authorization 938130561Sobrien */ 939130561Sobrien 940130561Sobrien/* 941130561Sobrien * Base64 encoding 942130561Sobrien */ 943130561Sobrienstatic char * 944130561Sobrienhttp_base64(const char *src) 945130561Sobrien{ 94633965Sjdp static const char base64[] = 947130561Sobrien "ABCDEFGHIJKLMNOPQRSTUVWXYZ" 948130561Sobrien "abcdefghijklmnopqrstuvwxyz" 949130561Sobrien "0123456789+/"; 950130561Sobrien char *str, *dst; 951130561Sobrien size_t l; 952130561Sobrien int t, r; 95333965Sjdp 954130561Sobrien l = strlen(src); 955130561Sobrien if ((str = malloc(((l + 2) / 3) * 4 + 1)) == NULL) 956130561Sobrien return (NULL); 957130561Sobrien dst = str; 958130561Sobrien r = 0; 959130561Sobrien 960130561Sobrien while (l >= 3) { 961130561Sobrien t = (src[0] << 16) | (src[1] << 8) | src[2]; 96289857Sobrien dst[0] = base64[(t >> 18) & 0x3f]; 963130561Sobrien dst[1] = base64[(t >> 12) & 0x3f]; 964130561Sobrien dst[2] = base64[(t >> 6) & 0x3f]; 965130561Sobrien dst[3] = base64[(t >> 0) & 0x3f]; 96633965Sjdp src += 3; l -= 3; 967130561Sobrien dst += 4; r += 4; 968130561Sobrien } 969130561Sobrien 970130561Sobrien switch (l) { 971130561Sobrien case 2: 972130561Sobrien t = (src[0] << 16) | (src[1] << 8); 973130561Sobrien dst[0] = base64[(t >> 18) & 0x3f]; 974130561Sobrien dst[1] = base64[(t >> 12) & 0x3f]; 975130561Sobrien dst[2] = base64[(t >> 6) & 0x3f]; 976130561Sobrien dst[3] = '='; 977130561Sobrien dst += 4; 978130561Sobrien r += 4; 979130561Sobrien break; 980130561Sobrien case 1: 981130561Sobrien t = src[0] << 16; 982130561Sobrien dst[0] = base64[(t >> 18) & 0x3f]; 983130561Sobrien dst[1] = base64[(t >> 12) & 0x3f]; 984130561Sobrien dst[2] = dst[3] = '='; 985130561Sobrien dst += 4; 986130561Sobrien r += 4; 987130561Sobrien break; 98860484Sobrien case 0: 989218822Sdim break; 99060484Sobrien } 99160484Sobrien 99260484Sobrien *dst = 0; 99360484Sobrien return (str); 994218822Sdim} 995218822Sdim 996218822Sdim 997218822Sdim/* 998104834Sobrien * Extract authorization parameters from environment value. 99977298Sobrien * The value is like scheme:realm:user:pass 1000218822Sdim */ 100178828Sobrientypedef struct { 100278828Sobrien char *scheme; 1003130561Sobrien char *realm; 100478828Sobrien char *user; 100578828Sobrien char *password; 1006218822Sdim} http_auth_params_t; 100733965Sjdp 100833965Sjdpstatic void 100989857Sobrieninit_http_auth_params(http_auth_params_t *s) 101033965Sjdp{ 101160484Sobrien s->scheme = s->realm = s->user = s->password = 0; 101233965Sjdp} 101360484Sobrien 101460484Sobrienstatic void 101533965Sjdpclean_http_auth_params(http_auth_params_t *s) 1016218822Sdim{ 101780016Sobrien if (s->scheme) 101880016Sobrien free(s->scheme); 1019218822Sdim if (s->realm) 102033965Sjdp free(s->realm); 102160484Sobrien if (s->user) 102260484Sobrien free(s->user); 102360484Sobrien if (s->password) 102433965Sjdp free(s->password); 102533965Sjdp init_http_auth_params(s); 102638889Sjdp} 1027218822Sdim 1028218822Sdimstatic int 1029218822Sdimhttp_authfromenv(const char *p, http_auth_params_t *parms) 1030218822Sdim{ 1031218822Sdim int ret = -1; 1032218822Sdim char *v, *ve; 1033218822Sdim char *str = strdup(p); 1034218822Sdim 1035218822Sdim if (str == NULL) { 1036218822Sdim fetch_syserr(); 1037218822Sdim return (-1); 1038218822Sdim } 1039218822Sdim v = str; 1040218822Sdim 1041218822Sdim if ((ve = strchr(v, ':')) == NULL) 1042218822Sdim goto out; 1043218822Sdim 1044218822Sdim *ve = 0; 1045218822Sdim if ((parms->scheme = strdup(v)) == NULL) { 1046218822Sdim fetch_syserr(); 1047218822Sdim goto out; 1048218822Sdim } 104933965Sjdp v = ve + 1; 1050218822Sdim 105133965Sjdp if ((ve = strchr(v, ':')) == NULL) 1052218822Sdim goto out; 105333965Sjdp 1054218822Sdim *ve = 0; 1055218822Sdim if ((parms->realm = strdup(v)) == NULL) { 1056218822Sdim fetch_syserr(); 1057218822Sdim goto out; 1058218822Sdim } 1059218822Sdim v = ve + 1; 1060218822Sdim 1061218822Sdim if ((ve = strchr(v, ':')) == NULL) 1062218822Sdim goto out; 1063218822Sdim 1064218822Sdim *ve = 0; 1065218822Sdim if ((parms->user = strdup(v)) == NULL) { 1066218822Sdim fetch_syserr(); 1067218822Sdim goto out; 1068218822Sdim } 1069218822Sdim v = ve + 1; 1070218822Sdim 1071218822Sdim 1072218822Sdim if ((parms->password = strdup(v)) == NULL) { 1073218822Sdim fetch_syserr(); 1074218822Sdim goto out; 1075218822Sdim } 1076218822Sdim ret = 0; 1077218822Sdimout: 1078218822Sdim if (ret == -1) 1079218822Sdim clean_http_auth_params(parms); 1080218822Sdim if (str) 108133965Sjdp free(str); 108233965Sjdp return (ret); 108333965Sjdp} 108433965Sjdp 108533965Sjdp 108633965Sjdp/* 108733965Sjdp * Digest response: the code to compute the digest is taken from the 108833965Sjdp * sample implementation in RFC2616 108989857Sobrien */ 109089857Sobrien#define IN 109160484Sobrien#define OUT 1092130561Sobrien 109360484Sobrien#define HASHLEN 16 109460484Sobrientypedef char HASH[HASHLEN]; 109560484Sobrien#define HASHHEXLEN 32 109689857Sobrientypedef char HASHHEX[HASHHEXLEN+1]; 109789857Sobrien 109889857Sobrienstatic const char *hexchars = "0123456789abcdef"; 109960484Sobrienstatic void 110089857SobrienCvtHex(IN HASH Bin, OUT HASHHEX Hex) 110160484Sobrien{ 110260484Sobrien unsigned short i; 110389857Sobrien unsigned char j; 110460484Sobrien 110560484Sobrien for (i = 0; i < HASHLEN; i++) { 1106130561Sobrien j = (Bin[i] >> 4) & 0xf; 110760484Sobrien Hex[i*2] = hexchars[j]; 110860484Sobrien j = Bin[i] & 0xf; 110960484Sobrien Hex[i*2+1] = hexchars[j]; 111060484Sobrien }; 111160484Sobrien Hex[HASHHEXLEN] = '\0'; 111260484Sobrien}; 111360484Sobrien 111460484Sobrien/* calculate H(A1) as per spec */ 111589857Sobrienstatic void 1116130561SobrienDigestCalcHA1( 111760484Sobrien IN char * pszAlg, 111860484Sobrien IN char * pszUserName, 111989857Sobrien IN char * pszRealm, 1120130561Sobrien IN char * pszPassword, 112160484Sobrien IN char * pszNonce, 112260484Sobrien IN char * pszCNonce, 1123130561Sobrien OUT HASHHEX SessionKey 112460484Sobrien ) 112560484Sobrien{ 112660484Sobrien MD5_CTX Md5Ctx; 112760484Sobrien HASH HA1; 112860484Sobrien 112960484Sobrien MD5Init(&Md5Ctx); 113060484Sobrien MD5Update(&Md5Ctx, pszUserName, strlen(pszUserName)); 113160484Sobrien MD5Update(&Md5Ctx, ":", 1); 1132130561Sobrien MD5Update(&Md5Ctx, pszRealm, strlen(pszRealm)); 1133130561Sobrien MD5Update(&Md5Ctx, ":", 1); 113433965Sjdp MD5Update(&Md5Ctx, pszPassword, strlen(pszPassword)); 113533965Sjdp MD5Final(HA1, &Md5Ctx); 1136130561Sobrien if (strcasecmp(pszAlg, "md5-sess") == 0) { 113733965Sjdp 1138130561Sobrien MD5Init(&Md5Ctx); 1139130561Sobrien MD5Update(&Md5Ctx, HA1, HASHLEN); 1140130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1141130561Sobrien MD5Update(&Md5Ctx, pszNonce, strlen(pszNonce)); 1142130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1143130561Sobrien MD5Update(&Md5Ctx, pszCNonce, strlen(pszCNonce)); 114433965Sjdp MD5Final(HA1, &Md5Ctx); 1145130561Sobrien }; 1146130561Sobrien CvtHex(HA1, SessionKey); 1147130561Sobrien} 1148130561Sobrien 114989857Sobrien/* calculate request-digest/response-digest as per HTTP Digest spec */ 1150130561Sobrienstatic void 1151130561SobrienDigestCalcResponse( 1152130561Sobrien IN HASHHEX HA1, /* H(A1) */ 1153130561Sobrien IN char * pszNonce, /* nonce from server */ 1154130561Sobrien IN char * pszNonceCount, /* 8 hex digits */ 1155130561Sobrien IN char * pszCNonce, /* client nonce */ 1156130561Sobrien IN char * pszQop, /* qop-value: "", "auth", "auth-int" */ 1157130561Sobrien IN char * pszMethod, /* method from the request */ 1158130561Sobrien IN char * pszDigestUri, /* requested URL */ 1159130561Sobrien IN HASHHEX HEntity, /* H(entity body) if qop="auth-int" */ 1160130561Sobrien OUT HASHHEX Response /* request-digest or response-digest */ 1161130561Sobrien ) 1162130561Sobrien{ 1163130561Sobrien/* DEBUG(fprintf(stderr, 1164130561Sobrien "Calc: HA1[%s] Nonce[%s] qop[%s] method[%s] URI[%s]\n", 1165130561Sobrien HA1, pszNonce, pszQop, pszMethod, pszDigestUri));*/ 1166130561Sobrien MD5_CTX Md5Ctx; 1167130561Sobrien HASH HA2; 1168130561Sobrien HASH RespHash; 1169130561Sobrien HASHHEX HA2Hex; 1170130561Sobrien 1171130561Sobrien // calculate H(A2) 1172130561Sobrien MD5Init(&Md5Ctx); 1173130561Sobrien MD5Update(&Md5Ctx, pszMethod, strlen(pszMethod)); 1174130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1175130561Sobrien MD5Update(&Md5Ctx, pszDigestUri, strlen(pszDigestUri)); 1176130561Sobrien if (strcasecmp(pszQop, "auth-int") == 0) { 1177130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1178130561Sobrien MD5Update(&Md5Ctx, HEntity, HASHHEXLEN); 1179130561Sobrien }; 1180130561Sobrien MD5Final(HA2, &Md5Ctx); 1181130561Sobrien CvtHex(HA2, HA2Hex); 1182130561Sobrien 1183130561Sobrien // calculate response 1184130561Sobrien MD5Init(&Md5Ctx); 1185130561Sobrien MD5Update(&Md5Ctx, HA1, HASHHEXLEN); 1186130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1187130561Sobrien MD5Update(&Md5Ctx, pszNonce, strlen(pszNonce)); 1188130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1189130561Sobrien if (*pszQop) { 1190130561Sobrien MD5Update(&Md5Ctx, pszNonceCount, strlen(pszNonceCount)); 1191130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1192130561Sobrien MD5Update(&Md5Ctx, pszCNonce, strlen(pszCNonce)); 1193130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1194130561Sobrien MD5Update(&Md5Ctx, pszQop, strlen(pszQop)); 1195130561Sobrien MD5Update(&Md5Ctx, ":", 1); 1196130561Sobrien }; 1197130561Sobrien MD5Update(&Md5Ctx, HA2Hex, HASHHEXLEN); 1198130561Sobrien MD5Final(RespHash, &Md5Ctx); 1199130561Sobrien CvtHex(RespHash, Response); 1200130561Sobrien} 1201130561Sobrien 1202130561Sobrien/* 1203130561Sobrien * Generate/Send a Digest authorization header 1204130561Sobrien * This looks like: [Proxy-]Authorization: credentials 1205130561Sobrien * 1206130561Sobrien * credentials = "Digest" digest-response 1207130561Sobrien * digest-response = 1#( username | realm | nonce | digest-uri 1208130561Sobrien * | response | [ algorithm ] | [cnonce] | 1209130561Sobrien * [opaque] | [message-qop] | 1210130561Sobrien * [nonce-count] | [auth-param] ) 1211130561Sobrien * username = "username" "=" username-value 1212130561Sobrien * username-value = quoted-string 1213130561Sobrien * digest-uri = "uri" "=" digest-uri-value 1214130561Sobrien * digest-uri-value = request-uri ; As specified by HTTP/1.1 1215130561Sobrien * message-qop = "qop" "=" qop-value 1216218822Sdim * cnonce = "cnonce" "=" cnonce-value 1217130561Sobrien * cnonce-value = nonce-value 1218130561Sobrien * nonce-count = "nc" "=" nc-value 1219130561Sobrien * nc-value = 8LHEX 1220130561Sobrien * response = "response" "=" request-digest 1221130561Sobrien * request-digest = <"> 32LHEX <"> 1222130561Sobrien */ 1223130561Sobrienstatic int 1224130561Sobrienhttp_digest_auth(conn_t *conn, const char *hdr, http_auth_challenge_t *c, 1225218822Sdim http_auth_params_t *parms, struct url *url) 1226130561Sobrien{ 1227130561Sobrien int r; 1228218822Sdim char noncecount[10]; 1229130561Sobrien char cnonce[40]; 1230130561Sobrien char *options = 0; 1231130561Sobrien 1232130561Sobrien if (!c->realm || !c->nonce) { 1233130561Sobrien DEBUG(fprintf(stderr, "realm/nonce not set in challenge\n")); 1234130561Sobrien return(-1); 1235130561Sobrien } 1236130561Sobrien if (!c->algo) 1237130561Sobrien c->algo = strdup(""); 1238218822Sdim 1239130561Sobrien if (asprintf(&options, "%s%s%s%s", 1240130561Sobrien *c->algo? ",algorithm=" : "", c->algo, 124133965Sjdp c->opaque? ",opaque=" : "", c->opaque?c->opaque:"")== -1) 124233965Sjdp return (-1); 1243218822Sdim 1244218822Sdim if (!c->qop) { 1245218822Sdim c->qop = strdup(""); 1246218822Sdim *noncecount = 0; 1247218822Sdim *cnonce = 0; 1248218822Sdim } else { 1249218822Sdim c->nc++; 1250218822Sdim sprintf(noncecount, "%08x", c->nc); 1251218822Sdim /* We don't try very hard with the cnonce ... */ 1252218822Sdim sprintf(cnonce, "%x%lx", getpid(), (unsigned long)time(0)); 1253218822Sdim } 1254218822Sdim 1255218822Sdim HASHHEX HA1; 1256218822Sdim DigestCalcHA1(c->algo, parms->user, c->realm, 1257218822Sdim parms->password, c->nonce, cnonce, HA1); 1258218822Sdim DEBUG(fprintf(stderr, "HA1: [%s]\n", HA1)); 1259218822Sdim HASHHEX digest; 1260218822Sdim DigestCalcResponse(HA1, c->nonce, noncecount, cnonce, c->qop, 1261218822Sdim "GET", url->doc, "", digest); 1262218822Sdim 1263218822Sdim if (c->qop[0]) { 1264218822Sdim r = http_cmd(conn, "%s: Digest username=\"%s\",realm=\"%s\"," 1265218822Sdim "nonce=\"%s\",uri=\"%s\",response=\"%s\"," 1266218822Sdim "qop=\"auth\", cnonce=\"%s\", nc=%s%s", 1267218822Sdim hdr, parms->user, c->realm, 1268218822Sdim c->nonce, url->doc, digest, 1269218822Sdim cnonce, noncecount, options); 1270218822Sdim } else { 1271218822Sdim r = http_cmd(conn, "%s: Digest username=\"%s\",realm=\"%s\"," 1272218822Sdim "nonce=\"%s\",uri=\"%s\",response=\"%s\"%s", 1273218822Sdim hdr, parms->user, c->realm, 1274218822Sdim c->nonce, url->doc, digest, options); 1275218822Sdim } 1276218822Sdim if (options) 1277218822Sdim free(options); 1278218822Sdim return (r); 1279218822Sdim} 1280218822Sdim 1281218822Sdim/* 1282218822Sdim * Encode username and password 1283218822Sdim */ 1284218822Sdimstatic int 1285218822Sdimhttp_basic_auth(conn_t *conn, const char *hdr, const char *usr, const char *pwd) 1286218822Sdim{ 1287218822Sdim char *upw, *auth; 1288218822Sdim int r; 1289218822Sdim 1290218822Sdim DEBUG(fprintf(stderr, "basic: usr: [%s]\n", usr)); 1291218822Sdim DEBUG(fprintf(stderr, "basic: pwd: [%s]\n", pwd)); 1292218822Sdim if (asprintf(&upw, "%s:%s", usr, pwd) == -1) 1293218822Sdim return (-1); 1294218822Sdim auth = http_base64(upw); 1295218822Sdim free(upw); 1296218822Sdim if (auth == NULL) 1297218822Sdim return (-1); 1298218822Sdim r = http_cmd(conn, "%s: Basic %s", hdr, auth); 1299218822Sdim free(auth); 1300218822Sdim return (r); 1301218822Sdim} 1302218822Sdim 1303218822Sdim/* 1304218822Sdim * Chose the challenge to answer and call the appropriate routine to 1305218822Sdim * produce the header. 1306218822Sdim */ 1307218822Sdimstatic int 1308218822Sdimhttp_authorize(conn_t *conn, const char *hdr, http_auth_challenges_t *cs, 1309218822Sdim http_auth_params_t *parms, struct url *url) 1310218822Sdim{ 1311130561Sobrien http_auth_challenge_t *basic = NULL; 1312130561Sobrien http_auth_challenge_t *digest = NULL; 131333965Sjdp int i; 1314130561Sobrien 1315130561Sobrien /* If user or pass are null we're not happy */ 131633965Sjdp if (!parms->user || !parms->password) { 131733965Sjdp DEBUG(fprintf(stderr, "NULL usr or pass\n")); 131833965Sjdp return (-1); 131933965Sjdp } 1320130561Sobrien 132133965Sjdp /* Look for a Digest and a Basic challenge */ 132233965Sjdp for (i = 0; i < cs->count; i++) { 132360484Sobrien if (cs->challenges[i]->scheme == HTTPAS_BASIC) 1324130561Sobrien basic = cs->challenges[i]; 1325130561Sobrien if (cs->challenges[i]->scheme == HTTPAS_DIGEST) 1326130561Sobrien digest = cs->challenges[i]; 132733965Sjdp } 132877298Sobrien 132977298Sobrien /* Error if "Digest" was specified and there is no Digest challenge */ 133077298Sobrien if (!digest && (parms->scheme && 1331130561Sobrien !strcasecmp(parms->scheme, "digest"))) { 1332130561Sobrien DEBUG(fprintf(stderr, 1333130561Sobrien "Digest auth in env, not supported by peer\n")); 133477298Sobrien return (-1); 1335130561Sobrien } 1336130561Sobrien /* 133777298Sobrien * If "basic" was specified in the environment, or there is no Digest 133860484Sobrien * challenge, do the basic thing. Don't need a challenge for this, 133933965Sjdp * so no need to check basic!=NULL 1340218822Sdim */ 1341218822Sdim if (!digest || (parms->scheme && !strcasecmp(parms->scheme,"basic"))) 134260484Sobrien return (http_basic_auth(conn,hdr,parms->user,parms->password)); 134333965Sjdp 1344218822Sdim /* Else, prefer digest. We just checked that it's not NULL */ 1345218822Sdim return (http_digest_auth(conn, hdr, digest, parms, url)); 134633965Sjdp} 1347218822Sdim 1348218822Sdim/***************************************************************************** 1349218822Sdim * Helper functions for connecting to a server or proxy 1350218822Sdim */ 1351218822Sdim 1352218822Sdim/* 1353218822Sdim * Connect to the correct HTTP server or proxy. 135433965Sjdp */ 1355104834Sobrienstatic conn_t * 1356104834Sobrienhttp_connect(struct url *URL, struct url *purl, const char *flags) 135789857Sobrien{ 135889857Sobrien conn_t *conn; 1359130561Sobrien int verbose; 1360130561Sobrien int af, val; 1361130561Sobrien 1362130561Sobrien#ifdef INET6 1363130561Sobrien af = AF_UNSPEC; 1364130561Sobrien#else 1365130561Sobrien af = AF_INET; 136689857Sobrien#endif 1367130561Sobrien 1368130561Sobrien verbose = CHECK_FLAG('v'); 1369218822Sdim if (CHECK_FLAG('4')) 1370130561Sobrien af = AF_INET; 1371130561Sobrien#ifdef INET6 137289857Sobrien else if (CHECK_FLAG('6')) 137333965Sjdp af = AF_INET6; 137489857Sobrien#endif 1375130561Sobrien 1376130561Sobrien if (purl && strcasecmp(URL->scheme, SCHEME_HTTPS) != 0) { 1377130561Sobrien URL = purl; 1378130561Sobrien } else if (strcasecmp(URL->scheme, SCHEME_FTP) == 0) { 1379130561Sobrien /* can't talk http to an ftp server */ 1380130561Sobrien /* XXX should set an error code */ 1381130561Sobrien return (NULL); 1382218822Sdim } 1383218822Sdim 1384130561Sobrien if ((conn = fetch_connect(URL->host, URL->port, af, verbose)) == NULL) 1385218822Sdim /* fetch_connect() has already set an error code */ 1386218822Sdim return (NULL); 1387218822Sdim if (strcasecmp(URL->scheme, SCHEME_HTTPS) == 0 && 1388218822Sdim fetch_ssl(conn, verbose) == -1) { 1389130561Sobrien fetch_close(conn); 139060484Sobrien /* grrr */ 139133965Sjdp errno = EAUTH; 1392130561Sobrien fetch_syserr(); 1393218822Sdim return (NULL); 1394130561Sobrien } 1395130561Sobrien 139633965Sjdp val = 1; 139733965Sjdp setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val, sizeof(val)); 139833965Sjdp 139960484Sobrien return (conn); 140033965Sjdp} 140133965Sjdp 140233965Sjdpstatic struct url * 1403218822Sdimhttp_get_proxy(struct url * url, const char *flags) 1404218822Sdim{ 1405218822Sdim struct url *purl; 1406218822Sdim char *p; 1407218822Sdim 1408218822Sdim if (flags != NULL && strchr(flags, 'd') != NULL) 1409218822Sdim return (NULL); 1410218822Sdim if (fetch_no_proxy_match(url->host)) 1411218822Sdim return (NULL); 1412218822Sdim if (((p = getenv("HTTP_PROXY")) || (p = getenv("http_proxy"))) && 1413218822Sdim *p && (purl = fetchParseURL(p))) { 1414218822Sdim if (!*purl->scheme) 1415218822Sdim strcpy(purl->scheme, SCHEME_HTTP); 1416218822Sdim if (!purl->port) 1417218822Sdim purl->port = fetch_default_proxy_port(purl->scheme); 1418218822Sdim if (strcasecmp(purl->scheme, SCHEME_HTTP) == 0) 1419218822Sdim return (purl); 1420218822Sdim fetchFreeURL(purl); 142160484Sobrien } 142233965Sjdp return (NULL); 1423130561Sobrien} 142433965Sjdp 1425218822Sdimstatic void 1426218822Sdimhttp_print_html(FILE *out, FILE *in) 142733965Sjdp{ 142833965Sjdp size_t len; 142933965Sjdp char *line, *p, *q; 143033965Sjdp int comment, tag; 143133965Sjdp 143233965Sjdp comment = tag = 0; 143333965Sjdp while ((line = fgetln(in, &len)) != NULL) { 1434130561Sobrien while (len && isspace((unsigned char)line[len - 1])) 1435130561Sobrien --len; 1436130561Sobrien for (p = q = line; q < line + len; ++q) { 1437130561Sobrien if (comment && *q == '-') { 1438130561Sobrien if (q + 2 < line + len && 143933965Sjdp strcmp(q, "-->") == 0) { 1440218822Sdim tag = comment = 0; 1441130561Sobrien q += 2; 1442130561Sobrien } 1443218822Sdim } else if (tag && !comment && *q == '>') { 1444218822Sdim p = q + 1; 1445218822Sdim tag = 0; 1446218822Sdim } else if (!tag && *q == '<') { 1447218822Sdim if (q > p) 1448218822Sdim fwrite(p, q - p, 1, out); 1449218822Sdim tag = 1; 1450218822Sdim if (q + 3 < line + len && 1451130561Sobrien strcmp(q, "<!--") == 0) { 1452218822Sdim comment = 1; 1453218822Sdim q += 3; 1454218822Sdim } 1455218822Sdim } 1456218822Sdim } 1457218822Sdim if (!tag && q > p) 1458218822Sdim fwrite(p, q - p, 1, out); 1459218822Sdim fputc('\n', out); 1460218822Sdim } 146133965Sjdp} 1462218822Sdim 1463130561Sobrien 1464130561Sobrien/***************************************************************************** 1465130561Sobrien * Core 1466130561Sobrien */ 146760484Sobrien 1468130561Sobrien/* 1469130561Sobrien * Send a request and process the reply 1470130561Sobrien * 1471130561Sobrien * XXX This function is way too long, the do..while loop should be split 1472130561Sobrien * XXX off into a separate function. 1473130561Sobrien */ 1474130561SobrienFILE * 1475130561Sobrienhttp_request(struct url *URL, const char *op, struct url_stat *us, 1476130561Sobrien struct url *purl, const char *flags) 147733965Sjdp{ 1478130561Sobrien char timebuf[80]; 147933965Sjdp char hbuf[MAXHOSTNAMELEN + 7], *host; 1480130561Sobrien conn_t *conn; 148160484Sobrien struct url *url, *new; 1482130561Sobrien int chunked, direct, ims, noredirect, verbose; 1483130561Sobrien int e, i, n, val; 1484130561Sobrien off_t offset, clength, length, size; 148560484Sobrien time_t mtime; 1486130561Sobrien const char *p; 1487130561Sobrien FILE *f; 148860484Sobrien hdr_t h; 148933965Sjdp struct tm *timestruct; 149033965Sjdp http_headerbuf_t headerbuf; 149133965Sjdp http_auth_challenges_t server_challenges; 149233965Sjdp http_auth_challenges_t proxy_challenges; 149333965Sjdp 1494130561Sobrien /* The following calls don't allocate anything */ 1495130561Sobrien init_http_headerbuf(&headerbuf); 1496130561Sobrien init_http_auth_challenges(&server_challenges); 1497130561Sobrien init_http_auth_challenges(&proxy_challenges); 1498130561Sobrien 1499130561Sobrien direct = CHECK_FLAG('d'); 1500130561Sobrien noredirect = CHECK_FLAG('A'); 1501130561Sobrien verbose = CHECK_FLAG('v'); 1502130561Sobrien ims = CHECK_FLAG('i'); 1503130561Sobrien 1504130561Sobrien if (direct && purl) { 1505218822Sdim fetchFreeURL(purl); 1506218822Sdim purl = NULL; 1507218822Sdim } 1508218822Sdim 1509218822Sdim /* try the provided URL first */ 1510218822Sdim url = URL; 1511218822Sdim 1512218822Sdim /* if the A flag is set, we only get one try */ 1513218822Sdim n = noredirect ? 1 : MAX_REDIRECT; 1514218822Sdim i = 0; 1515218822Sdim 1516218822Sdim e = HTTP_PROTOCOL_ERROR; 1517218822Sdim do { 1518218822Sdim new = NULL; 1519218822Sdim chunked = 0; 1520218822Sdim offset = 0; 1521218822Sdim clength = -1; 1522218822Sdim length = -1; 1523218822Sdim size = -1; 1524218822Sdim mtime = 0; 1525218822Sdim 1526218822Sdim /* check port */ 1527218822Sdim if (!url->port) 1528218822Sdim url->port = fetch_default_port(url->scheme); 1529218822Sdim 1530218822Sdim /* were we redirected to an FTP URL? */ 1531218822Sdim if (purl == NULL && strcmp(url->scheme, SCHEME_FTP) == 0) { 1532218822Sdim if (strcmp(op, "GET") == 0) 1533218822Sdim return (ftp_request(url, "RETR", us, purl, flags)); 1534218822Sdim else if (strcmp(op, "HEAD") == 0) 1535218822Sdim return (ftp_request(url, "STAT", us, purl, flags)); 1536218822Sdim } 1537218822Sdim 1538218822Sdim /* connect to server or proxy */ 1539218822Sdim if ((conn = http_connect(url, purl, flags)) == NULL) 1540218822Sdim goto ouch; 1541218822Sdim 1542218822Sdim host = url->host; 1543218822Sdim#ifdef INET6 1544218822Sdim if (strchr(url->host, ':')) { 1545222204Sbenl snprintf(hbuf, sizeof(hbuf), "[%s]", url->host); 1546222204Sbenl host = hbuf; 1547218822Sdim } 1548130561Sobrien#endif 1549130561Sobrien if (url->port != fetch_default_port(url->scheme)) { 1550218822Sdim if (host != hbuf) { 1551218822Sdim strcpy(hbuf, host); 155233965Sjdp host = hbuf; 155333965Sjdp } 155433965Sjdp snprintf(hbuf + strlen(hbuf), 155533965Sjdp sizeof(hbuf) - strlen(hbuf), ":%d", url->port); 155633965Sjdp } 155733965Sjdp 155833965Sjdp /* send request */ 155933965Sjdp if (verbose) 156033965Sjdp fetch_info("requesting %s://%s%s", 156133965Sjdp url->scheme, host, url->doc); 156233965Sjdp if (purl) { 1563130561Sobrien http_cmd(conn, "%s %s://%s%s HTTP/1.1", 156433965Sjdp op, url->scheme, host, url->doc); 1565130561Sobrien } else { 156633965Sjdp http_cmd(conn, "%s %s HTTP/1.1", 156738889Sjdp op, url->doc); 156833965Sjdp } 1569130561Sobrien 157033965Sjdp if (ims && url->ims_time) { 157133965Sjdp timestruct = gmtime((time_t *)&url->ims_time); 157233965Sjdp (void)strftime(timebuf, 80, "%a, %d %b %Y %T GMT", 157333965Sjdp timestruct); 157433965Sjdp if (verbose) 157533965Sjdp fetch_info("If-Modified-Since: %s", timebuf); 157633965Sjdp http_cmd(conn, "If-Modified-Since: %s", timebuf); 157733965Sjdp } 157833965Sjdp /* virtual host */ 157933965Sjdp http_cmd(conn, "Host: %s", host); 158033965Sjdp 158133965Sjdp /* 158233965Sjdp * Proxy authorization: we only send auth after we received 158333965Sjdp * a 407 error. We do not first try basic anyway (changed 158433965Sjdp * when support was added for digest-auth) 158533965Sjdp */ 158638889Sjdp if (purl && proxy_challenges.valid) { 158738889Sjdp http_auth_params_t aparams; 158833965Sjdp init_http_auth_params(&aparams); 158933965Sjdp if (*purl->user || *purl->pwd) { 159033965Sjdp aparams.user = purl->user ? 159133965Sjdp strdup(purl->user) : strdup(""); 159233965Sjdp aparams.password = purl->pwd? 159360484Sobrien strdup(purl->pwd) : strdup(""); 1594104834Sobrien } else if ((p = getenv("HTTP_PROXY_AUTH")) != NULL && 1595104834Sobrien *p != '\0') { 159633965Sjdp if (http_authfromenv(p, &aparams) < 0) { 159733965Sjdp http_seterr(HTTP_NEED_PROXY_AUTH); 159833965Sjdp goto ouch; 159933965Sjdp } 160033965Sjdp } 160133965Sjdp http_authorize(conn, "Proxy-Authorization", 160233965Sjdp &proxy_challenges, &aparams, url); 160333965Sjdp clean_http_auth_params(&aparams); 160433965Sjdp } 160533965Sjdp 160633965Sjdp /* 160733965Sjdp * Server authorization: we never send "a priori" 160838889Sjdp * Basic auth, which used to be done if user/pass were 160933965Sjdp * set in the url. This would be weird because we'd send the 161033965Sjdp * password in the clear even if Digest is finally to be 161138889Sjdp * used (it would have made more sense for the 161233965Sjdp * pre-digest version to do this when Basic was specified 161338889Sjdp * in the environment) 161433965Sjdp */ 161533965Sjdp if (server_challenges.valid) { 161638889Sjdp http_auth_params_t aparams; 161733965Sjdp init_http_auth_params(&aparams); 161860484Sobrien if (*url->user || *url->pwd) { 1619104834Sobrien aparams.user = url->user ? 1620104834Sobrien strdup(url->user) : strdup(""); 162133965Sjdp aparams.password = url->pwd ? 162233965Sjdp strdup(url->pwd) : strdup(""); 162333965Sjdp } else if ((p = getenv("HTTP_AUTH")) != NULL && 162433965Sjdp *p != '\0') { 162538889Sjdp if (http_authfromenv(p, &aparams) < 0) { 162638889Sjdp http_seterr(HTTP_NEED_AUTH); 162738889Sjdp goto ouch; 162833965Sjdp } 162933965Sjdp } else if (fetchAuthMethod && 163038889Sjdp fetchAuthMethod(url) == 0) { 163133965Sjdp aparams.user = url->user ? 163233965Sjdp strdup(url->user) : strdup(""); 163389857Sobrien aparams.password = url->pwd ? 163489857Sobrien strdup(url->pwd) : strdup(""); 163560484Sobrien } else { 163660484Sobrien http_seterr(HTTP_NEED_AUTH); 163760484Sobrien goto ouch; 163833965Sjdp } 163960484Sobrien http_authorize(conn, "Authorization", 164060484Sobrien &server_challenges, &aparams, url); 164160484Sobrien clean_http_auth_params(&aparams); 1642130561Sobrien } 164360484Sobrien 1644218822Sdim /* other headers */ 164560484Sobrien if ((p = getenv("HTTP_REFERER")) != NULL && *p != '\0') { 164660484Sobrien if (strcasecmp(p, "auto") == 0) 164760484Sobrien http_cmd(conn, "Referer: %s://%s%s", 1648218822Sdim url->scheme, host, url->doc); 164978828Sobrien else 165060484Sobrien http_cmd(conn, "Referer: %s", p); 1651130561Sobrien } 165260484Sobrien if ((p = getenv("HTTP_USER_AGENT")) != NULL && *p != '\0') 165360484Sobrien http_cmd(conn, "User-Agent: %s", p); 165460484Sobrien else 165560484Sobrien http_cmd(conn, "User-Agent: %s " _LIBFETCH_VER, getprogname()); 165660484Sobrien if (url->offset > 0) 165760484Sobrien http_cmd(conn, "Range: bytes=%lld-", (long long)url->offset); 165860484Sobrien http_cmd(conn, "Connection: close"); 165960484Sobrien http_cmd(conn, ""); 166060484Sobrien 166160484Sobrien /* 166233965Sjdp * Force the queued request to be dispatched. Normally, one 166360484Sobrien * would do this with shutdown(2) but squid proxies can be 166460484Sobrien * configured to disallow such half-closed connections. To 166560484Sobrien * be compatible with such configurations, fiddle with socket 166660484Sobrien * options to force the pending data to be written. 166760484Sobrien */ 166860484Sobrien val = 0; 166960484Sobrien setsockopt(conn->sd, IPPROTO_TCP, TCP_NOPUSH, &val, 167060484Sobrien sizeof(val)); 1671130561Sobrien val = 1; 1672130561Sobrien setsockopt(conn->sd, IPPROTO_TCP, TCP_NODELAY, &val, 167360484Sobrien sizeof(val)); 167460484Sobrien 167533965Sjdp /* get reply */ 167660484Sobrien switch (http_get_reply(conn)) { 167760484Sobrien case HTTP_OK: 167860484Sobrien case HTTP_PARTIAL: 167933965Sjdp case HTTP_NOT_MODIFIED: 168060484Sobrien /* fine */ 1681130561Sobrien break; 168233965Sjdp case HTTP_MOVED_PERM: 168333965Sjdp case HTTP_MOVED_TEMP: 168433965Sjdp case HTTP_SEE_OTHER: 168533965Sjdp /* 168633965Sjdp * Not so fine, but we still have to read the 168733965Sjdp * headers to get the new location. 1688130561Sobrien */ 168933965Sjdp break; 169033965Sjdp case HTTP_NEED_AUTH: 169133965Sjdp if (server_challenges.valid) { 169233965Sjdp /* 169333965Sjdp * We already sent out authorization code, 169433965Sjdp * so there's nothing more we can do. 169533965Sjdp */ 1696130561Sobrien http_seterr(conn->err); 1697130561Sobrien goto ouch; 1698130561Sobrien } 1699130561Sobrien /* try again, but send the password this time */ 1700130561Sobrien if (verbose) 1701130561Sobrien fetch_info("server requires authorization"); 170233965Sjdp break; 170333965Sjdp case HTTP_NEED_PROXY_AUTH: 170433965Sjdp if (proxy_challenges.valid) { 1705130561Sobrien /* 1706130561Sobrien * We already sent our proxy 1707130561Sobrien * authorization code, so there's 1708130561Sobrien * nothing more we can do. */ 1709130561Sobrien http_seterr(conn->err); 1710130561Sobrien goto ouch; 1711130561Sobrien } 1712130561Sobrien /* try again, but send the password this time */ 1713130561Sobrien if (verbose) 1714130561Sobrien fetch_info("proxy requires authorization"); 171533965Sjdp break; 171633965Sjdp case HTTP_BAD_RANGE: 171733965Sjdp /* 171833965Sjdp * This can happen if we ask for 0 bytes because 171933965Sjdp * we already have the whole file. Consider this 172033965Sjdp * a success for now, and check sizes later. 172133965Sjdp */ 172233965Sjdp break; 1723130561Sobrien case HTTP_PROTOCOL_ERROR: 1724130561Sobrien /* fall through */ 172533965Sjdp case -1: 172633965Sjdp fetch_syserr(); 172733965Sjdp goto ouch; 172833965Sjdp default: 172933965Sjdp http_seterr(conn->err); 173033965Sjdp if (!verbose) 173133965Sjdp goto ouch; 173233965Sjdp /* fall through so we can get the full error message */ 173333965Sjdp } 173433965Sjdp 173533965Sjdp /* get headers. http_next_header expects one line readahead */ 173689857Sobrien if (fetch_getln(conn) == -1) { 173733965Sjdp fetch_syserr(); 173833965Sjdp goto ouch; 173933965Sjdp } 174033965Sjdp do { 174133965Sjdp switch ((h = http_next_header(conn, &headerbuf, &p))) { 174233965Sjdp case hdr_syserror: 174333965Sjdp fetch_syserr(); 174433965Sjdp goto ouch; 174560484Sobrien case hdr_error: 174633965Sjdp http_seterr(HTTP_PROTOCOL_ERROR); 174733965Sjdp goto ouch; 1748130561Sobrien case hdr_content_length: 1749130561Sobrien http_parse_length(p, &clength); 1750130561Sobrien break; 1751130561Sobrien case hdr_content_range: 175260484Sobrien http_parse_range(p, &offset, &length, &size); 175333965Sjdp break; 175433965Sjdp case hdr_last_modified: 175533965Sjdp http_parse_mtime(p, &mtime); 175633965Sjdp break; 175733965Sjdp case hdr_location: 175833965Sjdp if (!HTTP_REDIRECT(conn->err)) 175933965Sjdp break; 1760218822Sdim if (new) 1761218822Sdim free(new); 1762218822Sdim if (verbose) 1763218822Sdim fetch_info("%d redirect to %s", conn->err, p); 1764218822Sdim if (*p == '/') 176533965Sjdp /* absolute path */ 176633965Sjdp new = fetchMakeURL(url->scheme, url->host, url->port, p, 176733965Sjdp url->user, url->pwd); 176833965Sjdp else 1769218822Sdim new = fetchParseURL(p); 177033965Sjdp if (new == NULL) { 177160484Sobrien /* XXX should set an error code */ 177260484Sobrien DEBUG(fprintf(stderr, "failed to parse new URL\n")); 177360484Sobrien goto ouch; 1774130561Sobrien } 177533965Sjdp if (!*new->user && !*new->pwd) { 177689857Sobrien strcpy(new->user, url->user); 177789857Sobrien strcpy(new->pwd, url->pwd); 177889857Sobrien } 177989857Sobrien new->offset = url->offset; 1780218822Sdim new->length = url->length; 1781218822Sdim break; 1782218822Sdim case hdr_transfer_encoding: 1783218822Sdim /* XXX weak test*/ 1784218822Sdim chunked = (strcasecmp(p, "chunked") == 0); 1785218822Sdim break; 1786218822Sdim case hdr_www_authenticate: 1787218822Sdim if (conn->err != HTTP_NEED_AUTH) 1788218822Sdim break; 1789218822Sdim if (http_parse_authenticate(p, &server_challenges) == 0) 1790218822Sdim ++n; 1791218822Sdim break; 1792218822Sdim case hdr_proxy_authenticate: 1793218822Sdim if (conn->err != HTTP_NEED_PROXY_AUTH) 1794218822Sdim break; 1795130561Sobrien if (http_parse_authenticate(p, &proxy_challenges) == 0) 1796130561Sobrien ++n; 179733965Sjdp break; 179833965Sjdp case hdr_end: 179933965Sjdp /* fall through */ 1800218822Sdim case hdr_unknown: 1801218822Sdim /* ignore */ 1802218822Sdim break; 1803218822Sdim } 180433965Sjdp } while (h > hdr_end); 180533965Sjdp 1806218822Sdim /* we need to provide authentication */ 1807218822Sdim if (conn->err == HTTP_NEED_AUTH || 180833965Sjdp conn->err == HTTP_NEED_PROXY_AUTH) { 180933965Sjdp e = conn->err; 181033965Sjdp if ((conn->err == HTTP_NEED_AUTH && 181133965Sjdp !server_challenges.valid) || 181291041Sobrien (conn->err == HTTP_NEED_PROXY_AUTH && 181333965Sjdp !proxy_challenges.valid)) { 181433965Sjdp /* 401/7 but no www/proxy-authenticate ?? */ 181533965Sjdp DEBUG(fprintf(stderr, "401/7 and no auth header\n")); 181633965Sjdp goto ouch; 1817218822Sdim } 181833965Sjdp fetch_close(conn); 181933965Sjdp conn = NULL; 1820218822Sdim continue; 1821218822Sdim } 1822218822Sdim 1823218822Sdim /* requested range not satisfiable */ 1824130561Sobrien if (conn->err == HTTP_BAD_RANGE) { 182533965Sjdp if (url->offset == size && url->length == 0) { 182633965Sjdp /* asked for 0 bytes; fake it */ 182733965Sjdp offset = url->offset; 182833965Sjdp clength = -1; 182933965Sjdp conn->err = HTTP_OK; 183089857Sobrien break; 183189857Sobrien } else { 183289857Sobrien http_seterr(conn->err); 183389857Sobrien goto ouch; 1834130561Sobrien } 183533965Sjdp } 183691041Sobrien 183791041Sobrien /* we have a hit or an error */ 183833965Sjdp if (conn->err == HTTP_OK 183960484Sobrien || conn->err == HTTP_NOT_MODIFIED 184060484Sobrien || conn->err == HTTP_PARTIAL 1841130561Sobrien || HTTP_ERROR(conn->err)) 184233965Sjdp break; 184391041Sobrien 184491041Sobrien /* all other cases: we got a redirect */ 184591041Sobrien e = conn->err; 184691041Sobrien clean_http_auth_challenges(&server_challenges); 184791041Sobrien fetch_close(conn); 184891041Sobrien conn = NULL; 184991041Sobrien if (!new) { 1850218822Sdim DEBUG(fprintf(stderr, "redirect with no new location\n")); 1851218822Sdim break; 1852218822Sdim } 1853218822Sdim if (url != URL) 1854130561Sobrien fetchFreeURL(url); 1855130561Sobrien url = new; 185691041Sobrien } while (++i < n); 185791041Sobrien 185891041Sobrien /* we failed, or ran out of retries */ 185991041Sobrien if (conn == NULL) { 186091041Sobrien http_seterr(e); 186191041Sobrien goto ouch; 186291041Sobrien } 186391041Sobrien 186460484Sobrien DEBUG(fprintf(stderr, "offset %lld, length %lld," 186560484Sobrien " size %lld, clength %lld\n", 186660484Sobrien (long long)offset, (long long)length, 186789857Sobrien (long long)size, (long long)clength)); 186860484Sobrien 186960484Sobrien if (conn->err == HTTP_NOT_MODIFIED) { 187060484Sobrien http_seterr(HTTP_NOT_MODIFIED); 187160484Sobrien return (NULL); 187260484Sobrien } 1873130561Sobrien 187433965Sjdp /* check for inconsistencies */ 187533965Sjdp if (clength != -1 && length != -1 && clength != length) { 1876218822Sdim http_seterr(HTTP_PROTOCOL_ERROR); 187733965Sjdp goto ouch; 187833965Sjdp } 1879130561Sobrien if (clength == -1) 1880218822Sdim clength = length; 1881218822Sdim if (clength != -1) 1882218822Sdim length = offset + clength; 1883218822Sdim if (length != -1 && size != -1 && length != size) { 1884218822Sdim http_seterr(HTTP_PROTOCOL_ERROR); 1885218822Sdim goto ouch; 1886218822Sdim } 188760484Sobrien if (size == -1) 1888218822Sdim size = length; 1889218822Sdim 1890218822Sdim /* fill in stats */ 1891218822Sdim if (us) { 1892218822Sdim us->size = size; 1893218822Sdim us->atime = us->mtime = mtime; 1894218822Sdim } 1895218822Sdim 1896218822Sdim /* too far? */ 1897218822Sdim if (URL->offset > 0 && offset > URL->offset) { 1898218822Sdim http_seterr(HTTP_PROTOCOL_ERROR); 1899218822Sdim goto ouch; 1900218822Sdim } 1901218822Sdim 1902218822Sdim /* report back real offset and size */ 1903218822Sdim URL->offset = offset; 1904218822Sdim URL->length = clength; 1905218822Sdim 1906218822Sdim /* wrap it up in a FILE */ 190733965Sjdp if ((f = http_funopen(conn, chunked)) == NULL) { 1908218822Sdim fetch_syserr(); 1909218822Sdim goto ouch; 1910218822Sdim } 1911218822Sdim 1912218822Sdim if (url != URL) 1913218822Sdim fetchFreeURL(url); 1914218822Sdim if (purl) 1915218822Sdim fetchFreeURL(purl); 1916218822Sdim 1917218822Sdim if (HTTP_ERROR(conn->err)) { 1918218822Sdim http_print_html(stderr, f); 1919218822Sdim fclose(f); 192033965Sjdp f = NULL; 192133965Sjdp } 1922130561Sobrien clean_http_headerbuf(&headerbuf); 1923130561Sobrien clean_http_auth_challenges(&server_challenges); 1924130561Sobrien clean_http_auth_challenges(&proxy_challenges); 1925130561Sobrien return (f); 1926130561Sobrien 1927130561Sobrienouch: 1928130561Sobrien if (url != URL) 1929130561Sobrien fetchFreeURL(url); 1930130561Sobrien if (purl) 193133965Sjdp fetchFreeURL(purl); 1932130561Sobrien if (conn != NULL) 1933130561Sobrien fetch_close(conn); 193433965Sjdp clean_http_headerbuf(&headerbuf); 1935130561Sobrien clean_http_auth_challenges(&server_challenges); 193633965Sjdp clean_http_auth_challenges(&proxy_challenges); 1937130561Sobrien return (NULL); 1938218822Sdim} 193933965Sjdp 1940130561Sobrien 194133965Sjdp/***************************************************************************** 1942130561Sobrien * Entry points 194333965Sjdp */ 1944130561Sobrien 1945130561Sobrien/* 194633965Sjdp * Retrieve and stat a file by HTTP 1947130561Sobrien */ 194833965SjdpFILE * 194933965SjdpfetchXGetHTTP(struct url *URL, struct url_stat *us, const char *flags) 195060484Sobrien{ 195133965Sjdp return (http_request(URL, "GET", us, http_get_proxy(URL, flags), flags)); 195233965Sjdp} 195360484Sobrien 195433965Sjdp/* 195533965Sjdp * Retrieve a file by HTTP 195633965Sjdp */ 195733965SjdpFILE * 195891041SobrienfetchGetHTTP(struct url *URL, const char *flags) 195991041Sobrien{ 196091041Sobrien return (fetchXGetHTTP(URL, NULL, flags)); 196191041Sobrien} 196291041Sobrien 196391041Sobrien/* 196491041Sobrien * Store a file by HTTP 196533965Sjdp */ 196633965SjdpFILE * 196733965SjdpfetchPutHTTP(struct url *URL __unused, const char *flags __unused) 196833965Sjdp{ 196933965Sjdp warnx("fetchPutHTTP(): not implemented"); 197033965Sjdp return (NULL); 197133965Sjdp} 1972130561Sobrien 1973130561Sobrien/* 197433965Sjdp * Get an HTTP document's metadata 197533965Sjdp */ 1976130561Sobrienint 1977130561SobrienfetchStatHTTP(struct url *URL, struct url_stat *us, const char *flags) 197833965Sjdp{ 1979130561Sobrien FILE *f; 1980130561Sobrien 1981130561Sobrien f = http_request(URL, "HEAD", us, http_get_proxy(URL, flags), flags); 1982130561Sobrien if (f == NULL) 1983130561Sobrien return (-1); 1984130561Sobrien fclose(f); 198533965Sjdp return (0); 198633965Sjdp} 198733965Sjdp 198833965Sjdp/* 198960484Sobrien * List a directory 199033965Sjdp */ 199133965Sjdpstruct url_ent * 199233965SjdpfetchListHTTP(struct url *url __unused, const char *flags __unused) 1993218822Sdim{ 199433965Sjdp warnx("fetchListHTTP(): not implemented"); 199533965Sjdp return (NULL); 199633965Sjdp} 199733965Sjdp