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