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 20 #include <stdio.h> 21 #include <unistd.h> 22 #include <libgen.h> 23 24 #include "opkg_download.h" 25 #include "opkg_message.h" 26 27 #include "sprintf_alloc.h" 28 #include "xsystem.h" 29 #include "file_util.h" 30 #include "opkg_defines.h" 31 #include "libbb/libbb.h" 32 33 static int str_starts_with(const char *str, const char *prefix) 34 { 35 return (strncmp(str, prefix, strlen(prefix)) == 0); 36 } 37 38 int opkg_verify_integrity(pkg_t *pkg, const char *filename) 39 { 40 int err = 0; 41 char *file_md5, *pkg_md5; 42 char *file_sha256, *pkg_sha256; 43 struct stat pkg_stat; 44 long long int pkg_expected_size; 45 46 /* Check file size */ 47 err = lstat(filename, &pkg_stat); 48 49 if (err) { 50 opkg_msg(ERROR, "Failed to stat %s: %s\n", 51 filename, strerror(errno)); 52 return err; 53 } 54 55 pkg_expected_size = pkg_get_int(pkg, PKG_SIZE); 56 57 if (pkg_expected_size > 0 && pkg_stat.st_size != pkg_expected_size) { 58 opkg_msg(INFO, 59 "Package size mismatch: %s is %lld bytes, expecting %lld bytes\n", 60 pkg->name, (long long int)pkg_stat.st_size, pkg_expected_size); 61 err = -1; 62 goto out; 63 } 64 65 /* Check for md5 values */ 66 pkg_md5 = pkg_get_md5(pkg); 67 if (pkg_md5) { 68 file_md5 = file_md5sum_alloc(filename); 69 if (file_md5 && strcmp(file_md5, pkg_md5)) { 70 opkg_msg(INFO, "Package %s md5sum mismatch.\n", 71 pkg->name); 72 err = -1; 73 free(file_md5); 74 goto out; 75 } 76 if (file_md5) 77 free(file_md5); 78 } 79 80 /* Check for sha256 value */ 81 pkg_sha256 = pkg_get_sha256(pkg); 82 if (pkg_sha256) { 83 file_sha256 = file_sha256sum_alloc(filename); 84 if (file_sha256 && strcmp(file_sha256, pkg_sha256)) { 85 opkg_msg(INFO, "Package %s sha256sum mismatch.\n", 86 pkg->name); 87 err = -1; 88 free(file_sha256); 89 goto out; 90 } 91 if (file_sha256) 92 free(file_sha256); 93 } 94 95 out: 96 return err; 97 } 98 99 int 100 opkg_download(const char *src, const char *dest_file_name, 101 const short hide_error) 102 { 103 int err = 0; 104 105 char *src_basec = xstrdup(src); 106 char *src_base = basename(src_basec); 107 char *tmp_file_location; 108 109 opkg_msg(NOTICE, "Downloading %s\n", src); 110 111 if (str_starts_with(src, "file:")) { 112 char *file_src = urldecode_path(src + 5); 113 opkg_msg(INFO, "Copying %s to %s...", file_src, dest_file_name); 114 err = file_copy(file_src, dest_file_name); 115 opkg_msg(INFO, "Done.\n"); 116 free(src_basec); 117 free(file_src); 118 return err; 119 } 120 121 sprintf_alloc(&tmp_file_location, "%s/%s", conf->tmp_dir, src_base); 122 free(src_basec); 123 err = unlink(tmp_file_location); 124 if (err && errno != ENOENT) { 125 opkg_perror(ERROR, "Failed to unlink %s", tmp_file_location); 126 free(tmp_file_location); 127 return -1; 128 } 129 130 if (conf->http_proxy) { 131 opkg_msg(DEBUG, 132 "Setting environment variable: http_proxy = %s.\n", 133 conf->http_proxy); 134 setenv("http_proxy", conf->http_proxy, 1); 135 } 136 if (conf->https_proxy) { 137 opkg_msg(DEBUG, 138 "Setting environment variable: https_proxy = %s.\n", 139 conf->https_proxy); 140 setenv("https_proxy", conf->https_proxy, 1); 141 } 142 if (conf->ftp_proxy) { 143 opkg_msg(DEBUG, 144 "Setting environment variable: ftp_proxy = %s.\n", 145 conf->ftp_proxy); 146 setenv("ftp_proxy", conf->ftp_proxy, 1); 147 } 148 if (conf->no_proxy) { 149 opkg_msg(DEBUG, 150 "Setting environment variable: no_proxy = %s.\n", 151 conf->no_proxy); 152 setenv("no_proxy", conf->no_proxy, 1); 153 } 154 155 { 156 int res; 157 const char *argv[11]; 158 int i = 0; 159 160 argv[i++] = "wget"; 161 argv[i++] = "-q"; 162 if (conf->no_check_certificate) { 163 argv[i++] = "--no-check-certificate"; 164 } 165 if (conf->http_timeout) { 166 argv[i++] = "--timeout"; 167 argv[i++] = conf->http_timeout; 168 } 169 if (conf->http_proxy || conf->https_proxy || conf->ftp_proxy) { 170 argv[i++] = "-Y"; 171 argv[i++] = "on"; 172 } 173 argv[i++] = "-O"; 174 argv[i++] = tmp_file_location; 175 argv[i++] = src; 176 argv[i++] = NULL; 177 res = xsystem(argv); 178 179 if (res) { 180 opkg_msg(ERROR, 181 "Failed to download %s, wget returned %d.\n", 182 src, res); 183 if (res == 4) 184 opkg_msg(ERROR, 185 "Check your network settings and connectivity.\n\n"); 186 free(tmp_file_location); 187 return -1; 188 } 189 } 190 191 err = file_move(tmp_file_location, dest_file_name); 192 193 free(tmp_file_location); 194 195 return err; 196 } 197 198 static char* get_cache_filename(const char *dest_file_name) 199 { 200 char *cache_name; 201 char *filename = strrchr(dest_file_name, '/'); 202 if (filename) 203 cache_name = xstrdup(filename + 1); // strip leading '/' 204 else 205 cache_name = xstrdup(dest_file_name); 206 return cache_name; 207 } 208 209 static int 210 opkg_download_cache(const char *src, const char *dest_file_name) 211 { 212 char *cache_name, *cache_location; 213 int err = 0; 214 215 if (!conf->cache || str_starts_with(src, "file:")) { 216 err = opkg_download(src, dest_file_name, 0); 217 goto out1; 218 } 219 220 if (!file_is_dir(conf->cache)) { 221 opkg_msg(ERROR, "%s is not a directory.\n", conf->cache); 222 err = 1; 223 goto out1; 224 } 225 226 cache_name = get_cache_filename(dest_file_name); 227 sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name); 228 if (file_exists(cache_location)) 229 opkg_msg(NOTICE, "Copying %s.\n", cache_location); 230 else { 231 err = opkg_download(src, cache_location, 0); 232 if (err) { 233 (void)unlink(cache_location); 234 goto out2; 235 } 236 } 237 238 err = file_copy(cache_location, dest_file_name); 239 240 out2: 241 free(cache_location); 242 free(cache_name); 243 out1: 244 return err; 245 } 246 247 int opkg_download_pkg(pkg_t * pkg, const char *dir) 248 { 249 int err; 250 char *url; 251 char *local_filename; 252 char *stripped_filename; 253 char *urlencoded_path; 254 char *filename; 255 char *cache_name; 256 char *cache_location; 257 258 if (pkg->src == NULL) { 259 opkg_msg(ERROR, 260 "Package %s is not available from any configured src.\n", 261 pkg->name); 262 return -1; 263 } 264 265 filename = pkg_get_string(pkg, PKG_FILENAME); 266 267 if (filename == NULL) { 268 opkg_msg(ERROR, 269 "Package %s does not have a valid filename field.\n", 270 pkg->name); 271 return -1; 272 } 273 274 urlencoded_path = urlencode_path(filename); 275 sprintf_alloc(&url, "%s/%s", pkg->src->value, urlencoded_path); 276 free(urlencoded_path); 277 278 /* The filename might be something like 279 "../../foo.opk". While this is correct, and exactly what we 280 want to use to construct url above, here we actually need to 281 use just the filename part, without any directory. */ 282 283 stripped_filename = strrchr(filename, '/'); 284 if (!stripped_filename) 285 stripped_filename = filename; 286 287 sprintf_alloc(&local_filename, "%s/%s", dir, stripped_filename); 288 pkg_set_string(pkg, PKG_LOCAL_FILENAME, local_filename); 289 290 /* Invalidate/remove cached package if it has an incorrect checksum. */ 291 if (conf->cache) { 292 cache_name = get_cache_filename(local_filename); 293 sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name); 294 free(cache_name); 295 if (file_exists(cache_location)) { 296 err = opkg_verify_integrity(pkg, cache_location); 297 if (err) { 298 opkg_msg(NOTICE, 299 "Removing %s from cache because it has incorrect checksum.\n", 300 pkg->name); 301 unlink(cache_location); 302 } 303 } 304 free(cache_location); 305 } 306 307 err = opkg_download_cache(url, local_filename); 308 free(url); 309 310 return err; 311 } 312 313 /* 314 * Downloads file from url, installs in package database, return package name. 315 */ 316 int opkg_prepare_url_for_install(const char *url, char **namep) 317 { 318 int err = 0; 319 pkg_t *pkg; 320 abstract_pkg_t *ab_pkg; 321 322 pkg = pkg_new(); 323 324 if (str_starts_with(url, "http://") 325 || str_starts_with(url, "ftp://")) { 326 char *tmp_file; 327 char *file_basec = xstrdup(url); 328 char *file_base = basename(file_basec); 329 330 sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base); 331 err = opkg_download(url, tmp_file, 0); 332 if (err) 333 return err; 334 335 err = pkg_init_from_file(pkg, tmp_file); 336 if (err) 337 return err; 338 339 free(tmp_file); 340 free(file_basec); 341 342 } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0 343 || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0 344 || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) { 345 346 err = pkg_init_from_file(pkg, url); 347 if (err) 348 return err; 349 opkg_msg(DEBUG2, "Package %s provided by hand (%s).\n", 350 pkg->name, pkg_get_string(pkg, PKG_LOCAL_FILENAME)); 351 pkg->provided_by_hand = 1; 352 353 } else { 354 ab_pkg = ensure_abstract_pkg_by_name(url); 355 356 if (!(ab_pkg->state_flag & SF_NEED_DETAIL)) { 357 opkg_msg(DEBUG, "applying abpkg flag to %s\n", ab_pkg->name); 358 ab_pkg->state_flag |= SF_NEED_DETAIL; 359 } 360 361 pkg_deinit(pkg); 362 free(pkg); 363 return 0; 364 } 365 366 pkg->dest = conf->default_dest; 367 pkg->state_want = SW_INSTALL; 368 pkg->state_flag |= SF_PREFER; 369 hash_insert_pkg(pkg, 1); 370 371 if (namep) { 372 *namep = xstrdup(pkg->name); 373 } 374 return 0; 375 } 376 377 int opkg_verify_file(char *text_file, char *sig_file) 378 { 379 #if defined HAVE_USIGN 380 const char *argv[] = { conf->verify_program, "verify", sig_file, 381 text_file, NULL }; 382 383 return xsystem(argv) ? -1 : 0; 384 #else 385 /* mute `unused variable' warnings. */ 386 (void)sig_file; 387 (void)text_file; 388 (void)conf; 389 return 0; 390 #endif 391 } 392
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