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