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