libopkg/opkg_download.c

   1 /* vi: set noexpandtab sw=4 sts=4: */
   2 /* opkg_download.c - the opkg package management system
   3
   4    Carl D. Worth
   5
   6    Copyright (C) 2001 University of Southern California
   7    Copyright (C) 2008 OpenMoko Inc
   8
   9    This program is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU General Public License as
  11    published by the Free Software Foundation; either version 2, or (at
  12    your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful, but
  15    WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    General Public License for more details.
  18 */
  19 #include "config.h"
  20 #ifdef HAVE_CURL
  21 #include <curl/curl.h>
  22 #endif
  23 #ifdef HAVE_GPGME
  24 #include <gpgme.h>
  25 #endif
  26
  27 #include "includes.h"
  28 #include "opkg_download.h"
  29 #include "opkg_message.h"
  30 #include "opkg_state.h"
  31
  32 #include "sprintf_alloc.h"
  33 #include "xsystem.h"
  34 #include "file_util.h"
  35 #include "str_util.h"
  36 #include "opkg_defines.h"
  37
  38 int opkg_download(opkg_conf_t *conf, const char *src,
  39   const char *dest_file_name, curl_progress_func cb, void *data)
  40 {
  41     int err = 0;
  42
  43     char *src_basec = strdup(src);
  44     char *src_base = basename(src_basec);
  45     char *tmp_file_location;
  46
  47     opkg_message(conf,OPKG_NOTICE,"Downloading %s\n", src);
  48
  49     if (str_starts_with(src, "file:")) {
  50         int ret;
  51         const char *file_src = src + 5;
  52         opkg_message(conf,OPKG_INFO,"Copying %s to %s...", file_src, dest_file_name);
  53         ret = file_copy(src + 5, dest_file_name);
  54         opkg_message(conf,OPKG_INFO,"Done\n");
  55         free(src_basec);
  56         return ret;
  57     }
  58
  59     sprintf_alloc(&tmp_file_location, "%s/%s", conf->tmp_dir, src_base);
  60     err = unlink(tmp_file_location);
  61     if (err && errno != ENOENT) {
  62         opkg_message(conf,OPKG_ERROR, "%s: ERROR: failed to unlink %s: %s\n",
  63                 __FUNCTION__, tmp_file_location, strerror(errno));
  64         free(tmp_file_location);
  65         free(src_basec);
  66         return errno;
  67     }
  68
  69     if (conf->http_proxy) {
  70         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: http_proxy = %s\n", conf->http_proxy);
  71         setenv("http_proxy", conf->http_proxy, 1);
  72     }
  73     if (conf->ftp_proxy) {
  74         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: ftp_proxy = %s\n", conf->ftp_proxy);
  75         setenv("ftp_proxy", conf->ftp_proxy, 1);
  76     }
  77     if (conf->no_proxy) {
  78         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: no_proxy = %s\n", conf->no_proxy);
  79         setenv("no_proxy", conf->no_proxy, 1);
  80     }
  81
  82 #ifdef HAVE_CURL
  83     CURL *curl;
  84     CURLcode res;
  85     FILE * file = fopen (tmp_file_location, "w");
  86
  87     curl = curl_easy_init ();
  88     if (curl)
  89     {
  90         curl_easy_setopt (curl, CURLOPT_URL, src);
  91         curl_easy_setopt (curl, CURLOPT_WRITEDATA, file);
  92         curl_easy_setopt (curl, CURLOPT_NOPROGRESS, (cb == NULL));
  93         if (cb)
  94         {
  95                 curl_easy_setopt (curl, CURLOPT_PROGRESSDATA, data);
  96                 curl_easy_setopt (curl, CURLOPT_PROGRESSFUNCTION, cb);
  97         }
  98         curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1);
  99         curl_easy_setopt (curl, CURLOPT_FAILONERROR, 1);
 100         if (conf->http_proxy || conf->ftp_proxy)
 101         {
 102             char *userpwd;
 103             sprintf_alloc (&userpwd, "%s:%s", conf->proxy_user,
 104                     conf->proxy_passwd);
 105             curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, userpwd);
 106             free (userpwd);
 107         }
 108         res = curl_easy_perform (curl);
 109         fclose (file);
 110         if (res)
 111         {
 112             long error_code;
 113             curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &error_code);
 114             opkg_message(conf, OPKG_ERROR, "Failed to download %s. \nerror detail: %s\n", src, curl_easy_strerror(res));
 115             free(tmp_file_location);
 116             free(src_basec);
 117             curl_easy_cleanup (curl);
 118             return res;
 119         }
 120         curl_easy_cleanup (curl);
 121
 122     }
 123     else
 124     {
 125         free(tmp_file_location);
 126         free(src_basec);
 127         return -1;
 128     }
 129 #else
 130     {
 131       int res;
 132       char *wgetcmd;
 133       char *wgetopts;
 134       wgetopts = getenv("OPKG_WGETOPTS");
 135       sprintf_alloc(&wgetcmd, "wget -q %s%s -O \"%s\" \"%s\"",
 136                     (conf->http_proxy || conf->ftp_proxy) ? "-Y on " : "",
 137                     (wgetopts!=NULL) ? wgetopts : "",
 138                     tmp_file_location, src);
 139       opkg_message(conf, OPKG_INFO, "Executing: %s\n", wgetcmd);
 140       res = xsystem(wgetcmd);
 141       free(wgetcmd);
 142       if (res) {
 143         opkg_message(conf, OPKG_ERROR, "Failed to download %s, error %d\n", src, res);
 144         free(tmp_file_location);
 145         free(src_basec);
 146         return res;
 147       }
 148     }
 149 #endif
 150
 151     err = file_move(tmp_file_location, dest_file_name);
 152
 153     free(tmp_file_location);
 154     free(src_basec);
 155
 156     if (err) {
 157         return err;
 158     }
 159
 160     return 0;
 161 }
 162
 163 static int opkg_download_cache(opkg_conf_t *conf, const char *src,
 164   const char *dest_file_name, curl_progress_func cb, void *data)
 165 {
 166     char *cache_name = strdup(src);
 167     char *cache_location, *p;
 168     int err = 0;
 169
 170     if (!conf->cache || str_starts_with(src, "file:")) {
 171         err = opkg_download(conf, src, dest_file_name, cb, data);
 172         goto out1;
 173     }
 174
 175     for (p = cache_name; *p; p++)
 176         if (*p == '/')
 177             *p = ',';   /* looks nicer than | or # */
 178
 179     sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name);
 180     if (file_exists(cache_location))
 181         opkg_message(conf, OPKG_NOTICE, "Copying %s\n", cache_location);
 182     else {
 183         err = opkg_download(conf, src, cache_location, cb, data);
 184         if (err) {
 185             (void) unlink(cache_location);
 186             goto out2;
 187         }
 188     }
 189
 190     err = file_copy(cache_location, dest_file_name);
 191
 192
 193 out2:
 194     free(cache_location);
 195 out1:
 196     free(cache_name);
 197     return err;
 198 }
 199
 200 int opkg_download_pkg(opkg_conf_t *conf, pkg_t *pkg, const char *dir)
 201 {
 202     int err;
 203     char *url;
 204     char *pkgid;
 205     char *stripped_filename;
 206
 207     if (pkg->src == NULL) {
 208         opkg_message(conf,OPKG_ERROR, "ERROR: Package %s (parent %s) is not available from any configured src.\n",
 209                 pkg->name, pkg->parent->name);
 210         return -1;
 211     }
 212     if (pkg->filename == NULL) {
 213         opkg_message(conf,OPKG_ERROR, "ERROR: Package %s (parent %s) does not have a valid filename field.\n",pkg->name, pkg->parent->name);
 214         return -1;
 215     }
 216
 217     sprintf_alloc (&pkgid, "%s;%s;%s;", pkg->name, pkg->version, pkg->architecture);
 218     opkg_set_current_state (conf, OPKG_STATE_DOWNLOADING_PKG, pkgid);
 219     free (pkgid);
 220
 221     sprintf_alloc(&url, "%s/%s", pkg->src->value, pkg->filename);
 222
 223     /* XXX: BUG: The pkg->filename might be something like
 224        "../../foo.opk". While this is correct, and exactly what we
 225        want to use to construct url above, here we actually need to
 226        use just the filename part, without any directory. */
 227
 228     stripped_filename = strrchr(pkg->filename, '/');
 229     if ( ! stripped_filename )
 230         stripped_filename = pkg->filename;
 231
 232     sprintf_alloc(&pkg->local_filename, "%s/%s", dir, stripped_filename);
 233
 234     err = opkg_download_cache(conf, url, pkg->local_filename, NULL, NULL);
 235     free(url);
 236
 237     opkg_set_current_state (conf, OPKG_STATE_NONE, NULL);
 238     return err;
 239 }
 240
 241 /*
 242  * Downloads file from url, installs in package database, return package name.
 243  */
 244 int opkg_prepare_url_for_install(opkg_conf_t *conf, const char *url, char **namep)
 245 {
 246      int err = 0;
 247      pkg_t *pkg;
 248      pkg = pkg_new();
 249      if (pkg == NULL)
 250           return ENOMEM;
 251
 252      if (str_starts_with(url, "http://")
 253          || str_starts_with(url, "ftp://")) {
 254           char *tmp_file;
 255           char *file_basec = strdup(url);
 256           char *file_base = basename(file_basec);
 257
 258           sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 259           err = opkg_download(conf, url, tmp_file, NULL, NULL);
 260           if (err)
 261                return err;
 262
 263           err = pkg_init_from_file(pkg, tmp_file);
 264           if (err)
 265                return err;
 266           pkg->local_filename = strdup(tmp_file);
 267
 268           free(tmp_file);
 269           free(file_basec);
 270
 271      } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 272                 || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0
 273                 || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 274
 275           err = pkg_init_from_file(pkg, url);
 276           if (err)
 277                return err;
 278           pkg->local_filename = strdup(url);
 279           opkg_message(conf, OPKG_DEBUG2, "Package %s provided by hand (%s).\n", pkg->name,pkg->local_filename);
 280           pkg->provided_by_hand = 1;
 281
 282      } else {
 283        pkg_deinit(pkg);
 284        free(pkg);
 285        return 0;
 286      }
 287
 288      if (!pkg->architecture) {
 289           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
 290           return -EINVAL;
 291      }
 292
 293      pkg->dest = conf->default_dest;
 294      pkg->state_want = SW_INSTALL;
 295      pkg->state_flag |= SF_PREFER;
 296      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 297      if ( pkg == NULL ){
 298         fprintf(stderr, "%s : This should never happen. Report this Bug in bugzilla please \n ",__FUNCTION__);
 299         return 0;
 300      }
 301      if (namep) {
 302           *namep = strdup(pkg->name);
 303      }
 304      return 0;
 305 }
 306
 307 int
 308 opkg_verify_file (opkg_conf_t *conf, char *text_file, char *sig_file)
 309 {
 310 #ifdef HAVE_GPGME
 311     if (conf->check_signature == 0 )
 312         return 0;
 313     int status = -1;
 314     gpgme_ctx_t ctx;
 315     gpgme_data_t sig, text, key;
 316     gpgme_error_t err = -1;
 317     gpgme_verify_result_t result;
 318     gpgme_signature_t s;
 319     char *trusted_path = NULL;
 320
 321     err = gpgme_new (&ctx);
 322
 323     if (err)
 324         return -1;
 325
 326     sprintf_alloc(&trusted_path, "%s/%s", conf->offline_root, "/etc/opkg/trusted.gpg");
 327     err = gpgme_data_new_from_file (&key, trusted_path, 1);
 328     free (trusted_path);
 329     if (err)
 330     {
 331       return -1;
 332     }
 333     err = gpgme_op_import (ctx, key);
 334     if (err)
 335     {
 336       gpgme_data_release (key);
 337       return -1;
 338     }
 339     gpgme_data_release (key);
 340
 341     err = gpgme_data_new_from_file (&sig, sig_file, 1);
 342     if (err)
 343     {
 344         gpgme_release (ctx);
 345         return -1;
 346     }
 347
 348     err = gpgme_data_new_from_file (&text, text_file, 1);
 349     if (err)
 350     {
 351         gpgme_data_release (sig);
 352         gpgme_release (ctx);
 353         return -1;
 354     }
 355
 356     err = gpgme_op_verify (ctx, sig, text, NULL);
 357
 358     result = gpgme_op_verify_result (ctx);
 359     if (!result)
 360         return -1;
 361
 362     /* see if any of the signitures matched */
 363     s = result->signatures;
 364     while (s)
 365     {
 366         status = gpg_err_code (s->status);
 367         if (status == GPG_ERR_NO_ERROR)
 368             break;
 369         s = s->next;
 370     }
 371
 372
 373     gpgme_data_release (sig);
 374     gpgme_data_release (text);
 375     gpgme_release (ctx);
 376
 377     return status;
 378 #else
 379     return 0;
 380 #endif
 381 }