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