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
  21 #ifdef HAVE_CURL
  22 #include <curl/curl.h>
  23 #endif
  24
  25 #if defined(HAVE_SSLCURL) || defined(HAVE_OPENSSL)
  26 #include <openssl/conf.h>
  27 #include <openssl/evp.h>
  28 #include <openssl/err.h>
  29 #include <openssl/ssl.h>
  30 #endif
  31
  32 #if defined(HAVE_GPGME)
  33 #include <gpgme.h>
  34 #elif defined(HAVE_OPENSSL)
  35 #include <openssl/bio.h>
  36 #include <openssl/objects.h>
  37 #include <openssl/x509.h>
  38 #include <openssl/pem.h>
  39 #include <openssl/hmac.h>
  40 #endif
  41
  42 #include "includes.h"
  43 #include "opkg_download.h"
  44 #include "opkg_message.h"
  45
  46 #include "sprintf_alloc.h"
  47 #include "xsystem.h"
  48 #include "file_util.h"
  49 #include "str_util.h"
  50 #include "opkg_defines.h"
  51 #include "libbb/libbb.h"
  52
  53 #ifdef HAVE_PATHFINDER
  54 #include "opkg_pathfinder.h"
  55 #endif
  56
  57 #if defined(HAVE_OPENSSL) || defined(HAVE_SSLCURL)
  58 static void openssl_init(void);
  59 #endif
  60
  61 #ifdef HAVE_OPENSSL
  62 static X509_STORE *setup_verify(opkg_conf_t *conf, char *CAfile, char *CApath);
  63 #endif
  64
  65 #ifdef HAVE_CURL
  66 /*
  67  * Make curl an instance variable so we don't have to instanciate it
  68  * each time
  69  */
  70 static CURL *curl = NULL;
  71 static void opkg_curl_cleanup(void);
  72 static CURL *opkg_curl_init(opkg_conf_t *conf, curl_progress_func cb, void *data);
  73 #endif
  74
  75 int opkg_download(opkg_conf_t *conf, const char *src,
  76   const char *dest_file_name, curl_progress_func cb, void *data)
  77 {
  78     int err = 0;
  79
  80     char *src_basec = xstrdup(src);
  81     char *src_base = basename(src_basec);
  82     char *tmp_file_location;
  83
  84     opkg_message(conf,OPKG_NOTICE,"Downloading %s\n", src);
  85
  86     if (str_starts_with(src, "file:")) {
  87         int ret;
  88         const char *file_src = src + 5;
  89         opkg_message(conf,OPKG_INFO,"Copying %s to %s...", file_src, dest_file_name);
  90         ret = file_copy(src + 5, dest_file_name);
  91         opkg_message(conf,OPKG_INFO,"Done\n");
  92         free(src_basec);
  93         return ret;
  94     }
  95
  96     sprintf_alloc(&tmp_file_location, "%s/%s", conf->tmp_dir, src_base);
  97     err = unlink(tmp_file_location);
  98     if (err && errno != ENOENT) {
  99         opkg_message(conf,OPKG_ERROR, "%s: ERROR: failed to unlink %s: %s\n",
 100                 __FUNCTION__, tmp_file_location, strerror(errno));
 101         free(tmp_file_location);
 102         free(src_basec);
 103         return errno;
 104     }
 105
 106     if (conf->http_proxy) {
 107         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: http_proxy = %s\n", conf->http_proxy);
 108         setenv("http_proxy", conf->http_proxy, 1);
 109     }
 110     if (conf->ftp_proxy) {
 111         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: ftp_proxy = %s\n", conf->ftp_proxy);
 112         setenv("ftp_proxy", conf->ftp_proxy, 1);
 113     }
 114     if (conf->no_proxy) {
 115         opkg_message(conf,OPKG_DEBUG,"Setting environment variable: no_proxy = %s\n", conf->no_proxy);
 116         setenv("no_proxy", conf->no_proxy, 1);
 117     }
 118
 119 #ifdef HAVE_CURL
 120     CURL *curl;
 121     CURLcode res;
 122     FILE * file = fopen (tmp_file_location, "w");
 123
 124     curl = opkg_curl_init (conf, cb, data);
 125     if (curl)
 126     {
 127         curl_easy_setopt (curl, CURLOPT_URL, src);
 128         curl_easy_setopt (curl, CURLOPT_WRITEDATA, file);
 129
 130         res = curl_easy_perform (curl);
 131         fclose (file);
 132         if (res)
 133         {
 134             long error_code;
 135             curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &error_code);
 136             opkg_message(conf, OPKG_ERROR, "Failed to download %s. \nerror detail: %s\n", src, curl_easy_strerror(res));
 137             free(tmp_file_location);
 138             free(src_basec);
 139             return res;
 140         }
 141
 142     }
 143     else
 144     {
 145         free(tmp_file_location);
 146         free(src_basec);
 147         return -1;
 148     }
 149 #else
 150     {
 151       int res;
 152       char *wgetcmd;
 153       char *wgetopts;
 154       wgetopts = getenv("OPKG_WGETOPTS");
 155       sprintf_alloc(&wgetcmd, "wget -q %s%s -O \"%s\" \"%s\"",
 156                     (conf->http_proxy || conf->ftp_proxy) ? "-Y on " : "",
 157                     (wgetopts!=NULL) ? wgetopts : "",
 158                     tmp_file_location, src);
 159       opkg_message(conf, OPKG_INFO, "Executing: %s\n", wgetcmd);
 160       res = xsystem(wgetcmd);
 161       free(wgetcmd);
 162       if (res) {
 163         opkg_message(conf, OPKG_ERROR, "Failed to download %s, error %d\n", src, res);
 164         free(tmp_file_location);
 165         free(src_basec);
 166         return res;
 167       }
 168     }
 169 #endif
 170
 171     err = file_move(tmp_file_location, dest_file_name);
 172
 173     free(tmp_file_location);
 174     free(src_basec);
 175
 176     if (err) {
 177         return err;
 178     }
 179
 180     return 0;
 181 }
 182
 183 static int opkg_download_cache(opkg_conf_t *conf, const char *src,
 184   const char *dest_file_name, curl_progress_func cb, void *data)
 185 {
 186     char *cache_name = xstrdup(src);
 187     char *cache_location, *p;
 188     int err = 0;
 189
 190     if (!conf->cache || str_starts_with(src, "file:")) {
 191         err = opkg_download(conf, src, dest_file_name, cb, data);
 192         goto out1;
 193     }
 194
 195     for (p = cache_name; *p; p++)
 196         if (*p == '/')
 197             *p = ',';   /* looks nicer than | or # */
 198
 199     sprintf_alloc(&cache_location, "%s/%s", conf->cache, cache_name);
 200     if (file_exists(cache_location))
 201         opkg_message(conf, OPKG_NOTICE, "Copying %s\n", cache_location);
 202     else {
 203         err = opkg_download(conf, src, cache_location, cb, data);
 204         if (err) {
 205             (void) unlink(cache_location);
 206             goto out2;
 207         }
 208     }
 209
 210     err = file_copy(cache_location, dest_file_name);
 211
 212
 213 out2:
 214     free(cache_location);
 215 out1:
 216     free(cache_name);
 217     return err;
 218 }
 219
 220 int opkg_download_pkg(opkg_conf_t *conf, pkg_t *pkg, const char *dir)
 221 {
 222     int err;
 223     char *url;
 224     char *stripped_filename;
 225
 226     if (pkg->src == NULL) {
 227         opkg_message(conf,OPKG_ERROR, "ERROR: Package %s (parent %s) is not available from any configured src.\n",
 228                 pkg->name, pkg->parent->name);
 229         return -1;
 230     }
 231     if (pkg->filename == NULL) {
 232         opkg_message(conf,OPKG_ERROR, "ERROR: Package %s (parent %s) does not have a valid filename field.\n",pkg->name, pkg->parent->name);
 233         return -1;
 234     }
 235
 236     sprintf_alloc(&url, "%s/%s", pkg->src->value, pkg->filename);
 237
 238     /* XXX: BUG: The pkg->filename might be something like
 239        "../../foo.opk". While this is correct, and exactly what we
 240        want to use to construct url above, here we actually need to
 241        use just the filename part, without any directory. */
 242
 243     stripped_filename = strrchr(pkg->filename, '/');
 244     if ( ! stripped_filename )
 245         stripped_filename = pkg->filename;
 246
 247     sprintf_alloc(&pkg->local_filename, "%s/%s", dir, stripped_filename);
 248
 249     err = opkg_download_cache(conf, url, pkg->local_filename, NULL, NULL);
 250     free(url);
 251
 252     return err;
 253 }
 254
 255 /*
 256  * Downloads file from url, installs in package database, return package name.
 257  */
 258 int opkg_prepare_url_for_install(opkg_conf_t *conf, const char *url, char **namep)
 259 {
 260      int err = 0;
 261      pkg_t *pkg;
 262      pkg = pkg_new();
 263      if (pkg == NULL)
 264           return ENOMEM;
 265
 266      if (str_starts_with(url, "http://")
 267          || str_starts_with(url, "ftp://")) {
 268           char *tmp_file;
 269           char *file_basec = xstrdup(url);
 270           char *file_base = basename(file_basec);
 271
 272           sprintf_alloc(&tmp_file, "%s/%s", conf->tmp_dir, file_base);
 273           err = opkg_download(conf, url, tmp_file, NULL, NULL);
 274           if (err)
 275                return err;
 276
 277           err = pkg_init_from_file(pkg, tmp_file);
 278           if (err)
 279                return err;
 280
 281           free(tmp_file);
 282           free(file_basec);
 283
 284      } else if (strcmp(&url[strlen(url) - 4], OPKG_PKG_EXTENSION) == 0
 285                 || strcmp(&url[strlen(url) - 4], IPKG_PKG_EXTENSION) == 0
 286                 || strcmp(&url[strlen(url) - 4], DPKG_PKG_EXTENSION) == 0) {
 287
 288           err = pkg_init_from_file(pkg, url);
 289           if (err)
 290                return err;
 291           opkg_message(conf, OPKG_DEBUG2, "Package %s provided by hand (%s).\n", pkg->name,pkg->local_filename);
 292           pkg->provided_by_hand = 1;
 293
 294      } else {
 295        pkg_deinit(pkg);
 296        free(pkg);
 297        return 0;
 298      }
 299
 300      if (!pkg->architecture) {
 301           opkg_message(conf, OPKG_ERROR, "Package %s has no Architecture defined.\n", pkg->name);
 302           return -EINVAL;
 303      }
 304
 305      pkg->dest = conf->default_dest;
 306      pkg->state_want = SW_INSTALL;
 307      pkg->state_flag |= SF_PREFER;
 308      pkg = hash_insert_pkg(&conf->pkg_hash, pkg, 1,conf);
 309      if ( pkg == NULL ){
 310         fprintf(stderr, "%s : This should never happen. Report this Bug in bugzilla please \n ",__FUNCTION__);
 311         return 0;
 312      }
 313      if (namep) {
 314           *namep = xstrdup(pkg->name);
 315      }
 316      return 0;
 317 }
 318
 319 int
 320 opkg_verify_file (opkg_conf_t *conf, char *text_file, char *sig_file)
 321 {
 322 #if defined HAVE_GPGME
 323     if (conf->check_signature == 0 )
 324         return 0;
 325     int status = -1;
 326     gpgme_ctx_t ctx;
 327     gpgme_data_t sig, text, key;
 328     gpgme_error_t err = -1;
 329     gpgme_verify_result_t result;
 330     gpgme_signature_t s;
 331     char *trusted_path = NULL;
 332
 333     err = gpgme_new (&ctx);
 334
 335     if (err)
 336         return -1;
 337
 338     sprintf_alloc(&trusted_path, "%s/%s", conf->offline_root, "/etc/opkg/trusted.gpg");
 339     err = gpgme_data_new_from_file (&key, trusted_path, 1);
 340     free (trusted_path);
 341     if (err)
 342     {
 343       return -1;
 344     }
 345     err = gpgme_op_import (ctx, key);
 346     if (err)
 347     {
 348       gpgme_data_release (key);
 349       return -1;
 350     }
 351     gpgme_data_release (key);
 352
 353     err = gpgme_data_new_from_file (&sig, sig_file, 1);
 354     if (err)
 355     {
 356         gpgme_release (ctx);
 357         return -1;
 358     }
 359
 360     err = gpgme_data_new_from_file (&text, text_file, 1);
 361     if (err)
 362     {
 363         gpgme_data_release (sig);
 364         gpgme_release (ctx);
 365         return -1;
 366     }
 367
 368     err = gpgme_op_verify (ctx, sig, text, NULL);
 369
 370     result = gpgme_op_verify_result (ctx);
 371     if (!result)
 372         return -1;
 373
 374     /* see if any of the signitures matched */
 375     s = result->signatures;
 376     while (s)
 377     {
 378         status = gpg_err_code (s->status);
 379         if (status == GPG_ERR_NO_ERROR)
 380             break;
 381         s = s->next;
 382     }
 383
 384
 385     gpgme_data_release (sig);
 386     gpgme_data_release (text);
 387     gpgme_release (ctx);
 388
 389     return status;
 390 #elif defined HAVE_OPENSSL
 391     X509_STORE *store = NULL;
 392     PKCS7 *p7 = NULL;
 393     BIO *in = NULL, *indata = NULL;
 394
 395     // Sig check failed by default !
 396     int status = -1;
 397
 398     openssl_init();
 399
 400     // Set-up the key store
 401     if(!(store = setup_verify(conf, conf->signature_ca_file, conf->signature_ca_path))){
 402         opkg_message(conf, OPKG_ERROR,
 403                 "Can't open CA certificates\n");
 404         goto verify_file_end;
 405     }
 406
 407     // Open a BIO to read the sig file
 408     if (!(in = BIO_new_file(sig_file, "rb"))){
 409         opkg_message(conf, OPKG_ERROR,
 410                 "Can't open signature file %s\n", sig_file);
 411         goto verify_file_end;
 412     }
 413
 414     // Read the PKCS7 block contained in the sig file
 415     p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
 416     if(!p7){
 417         opkg_message(conf, OPKG_ERROR,
 418                 "Can't read signature file (Corrupted ?)\n");
 419         goto verify_file_end;
 420     }
 421 #if defined(HAVE_PATHFINDER)
 422     if(!pkcs7_pathfinder_verify_signers(p7)){
 423         opkg_message(conf,  OPKG_ERROR, "pkcs7_pathfinder_verify_signers: "
 424                 "Path verification failed\n");
 425     }
 426
 427 #endif
 428
 429     // Open the Package file to authenticate
 430     if (!(indata = BIO_new_file(text_file, "rb"))){
 431         opkg_message(conf, OPKG_ERROR,
 432                 "Can't open file %s\n", text_file);
 433         goto verify_file_end;
 434     }
 435
 436     // Let's verify the autenticity !
 437     if (PKCS7_verify(p7, NULL, store, indata, NULL, PKCS7_BINARY) != 1){
 438         // Get Off My Lawn!
 439         opkg_message(conf, OPKG_ERROR,
 440                 "Verification failure\n");
 441     }else{
 442         // Victory !
 443         status = 0;
 444     }
 445
 446 verify_file_end:
 447     BIO_free(in);
 448     BIO_free(indata);
 449     PKCS7_free(p7);
 450     X509_STORE_free(store);
 451
 452     return status;
 453 #else
 454     /* mute `unused variable' warnings. */
 455     (void) sig_file;
 456     (void) text_file;
 457     (void) conf;
 458     return 0;
 459 #endif
 460 }
 461
 462
 463 #if defined(HAVE_OPENSSL) || defined(HAVE_SSLCURL)
 464 static void openssl_init(void){
 465     static int init = 0;
 466
 467     if(!init){
 468         OPENSSL_config(NULL);
 469         OpenSSL_add_all_algorithms();
 470         ERR_load_crypto_strings();
 471         init = 1;
 472     }
 473 }
 474
 475 #endif
 476
 477
 478 #if defined HAVE_OPENSSL
 479 static X509_STORE *setup_verify(opkg_conf_t *conf, char *CAfile, char *CApath){
 480     X509_STORE *store = NULL;
 481     X509_LOOKUP *lookup = NULL;
 482
 483     if(!(store = X509_STORE_new())){
 484         // Something bad is happening...
 485         goto end;
 486     }
 487
 488     // adds the X509 file lookup method
 489     lookup = X509_STORE_add_lookup(store,X509_LOOKUP_file());
 490     if (lookup == NULL){
 491         goto end;
 492     }
 493
 494     // Autenticating against one CA file
 495     if (CAfile) {
 496         if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) {
 497             // Invalid CA => Bye bye
 498             opkg_message(conf, OPKG_ERROR,
 499                     "Error loading file %s\n", CAfile);
 500             goto end;
 501         }
 502     } else {
 503         X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
 504     }
 505
 506     // Now look into CApath directory if supplied
 507     lookup = X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir());
 508     if (lookup == NULL){
 509         goto end;
 510     }
 511
 512     if (CApath) {
 513         if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) {
 514             opkg_message(conf, OPKG_ERROR,
 515                     "Error loading directory %s\n", CApath);
 516             goto end;
 517         }
 518     } else {
 519         X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
 520     }
 521
 522     // All right !
 523     ERR_clear_error();
 524     return store;
 525
 526 end:
 527
 528     X509_STORE_free(store);
 529     return NULL;
 530
 531 }
 532
 533 #endif
 534
 535 #ifdef HAVE_CURL
 536 static void opkg_curl_cleanup(void){
 537     if(curl != NULL){
 538         curl_easy_cleanup (curl);
 539         curl = NULL;
 540     }
 541 }
 542
 543 static CURL *opkg_curl_init(opkg_conf_t *conf, curl_progress_func cb, void *data){
 544
 545     if(curl == NULL){
 546         curl = curl_easy_init();
 547
 548 #ifdef HAVE_SSLCURL
 549         openssl_init();
 550
 551         if (conf->ssl_engine) {
 552
 553             /* use crypto engine */
 554             if (curl_easy_setopt(curl, CURLOPT_SSLENGINE, conf->ssl_engine) != CURLE_OK){
 555                 opkg_message(conf, OPKG_ERROR, "can't set crypto engine: '%s'\n",
 556                         conf->ssl_engine);
 557
 558                 opkg_curl_cleanup();
 559                 return NULL;
 560             }
 561             /* set the crypto engine as default */
 562             if (curl_easy_setopt(curl, CURLOPT_SSLENGINE_DEFAULT, 1L) != CURLE_OK){
 563                 opkg_message(conf, OPKG_ERROR, "can't set crypto engine as default\n");
 564
 565                 opkg_curl_cleanup();
 566                 return NULL;
 567             }
 568         }
 569
 570         /* cert & key can only be in PEM case in the same file */
 571         if(conf->ssl_key_passwd){
 572             if (curl_easy_setopt(curl, CURLOPT_SSLKEYPASSWD, conf->ssl_key_passwd) != CURLE_OK)
 573             {
 574                 opkg_message(conf, OPKG_DEBUG, "Failed to set key password\n");
 575             }
 576         }
 577
 578         /* sets the client certificate and its type */
 579         if(conf->ssl_cert_type){
 580             if (curl_easy_setopt(curl, CURLOPT_SSLCERTTYPE, conf->ssl_cert_type) != CURLE_OK)
 581             {
 582                 opkg_message(conf, OPKG_DEBUG, "Failed to set certificate format\n");
 583             }
 584         }
 585         /* SSL cert name isn't mandatory */
 586         if(conf->ssl_cert){
 587                 curl_easy_setopt(curl, CURLOPT_SSLCERT, conf->ssl_cert);
 588         }
 589
 590         /* sets the client key and its type */
 591         if(conf->ssl_key_type){
 592             if (curl_easy_setopt(curl, CURLOPT_SSLKEYTYPE, conf->ssl_key_type) != CURLE_OK)
 593             {
 594                 opkg_message(conf, OPKG_DEBUG, "Failed to set key format\n");
 595             }
 596         }
 597         if(conf->ssl_key){
 598             if (curl_easy_setopt(curl, CURLOPT_SSLKEY, conf->ssl_key) != CURLE_OK)
 599             {
 600                 opkg_message(conf, OPKG_DEBUG, "Failed to set key\n");
 601             }
 602         }
 603
 604         /* Should we verify the peer certificate ? */
 605         if(conf->ssl_dont_verify_peer){
 606             /*
 607              * CURLOPT_SSL_VERIFYPEER default is nonzero (curl => 7.10)
 608              */
 609             curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
 610         }else{
 611 #ifdef HAVE_PATHFINDER
 612             if (curl_easy_setopt(curl, CURLOPT_SSL_CTX_FUNCTION, curl_ssl_ctx_function) != CURLE_OK){
 613                 opkg_message(conf, OPKG_DEBUG, "Failed to set ssl path verification callback\n");
 614             }else{
 615                 curl_easy_setopt(curl, CURLOPT_SSL_CTX_DATA, NULL);
 616             }
 617
 618             //curl_easy_setopt(curl, CURLOPT_SSL_CERT_VERIFY_FUNCTION, curlcb_pathfinder);
 619 #endif
 620         }
 621
 622         /* certification authority file and/or path */
 623         if(conf->ssl_ca_file){
 624             curl_easy_setopt(curl, CURLOPT_CAINFO, conf->ssl_ca_file);
 625         }
 626         if(conf->ssl_ca_path){
 627             curl_easy_setopt(curl, CURLOPT_CAPATH, conf->ssl_ca_path);
 628         }
 629 #endif
 630
 631         curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1);
 632         curl_easy_setopt (curl, CURLOPT_FAILONERROR, 1);
 633         if (conf->http_proxy || conf->ftp_proxy)
 634         {
 635             char *userpwd;
 636             sprintf_alloc (&userpwd, "%s:%s", conf->proxy_user,
 637                     conf->proxy_passwd);
 638             curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, userpwd);
 639             free (userpwd);
 640         }
 641
 642         /* add curl cleanup callback */
 643         if(!atexit(opkg_curl_cleanup)){
 644             opkg_message(conf,OPKG_DEBUG, "Failed to register atexit curl cleanup function\n");
 645         }
 646
 647     }
 648
 649     curl_easy_setopt (curl, CURLOPT_NOPROGRESS, (cb == NULL));
 650     if (cb)
 651     {
 652         curl_easy_setopt (curl, CURLOPT_PROGRESSDATA, data);
 653         curl_easy_setopt (curl, CURLOPT_PROGRESSFUNCTION, cb);
 654     }
 655
 656     return curl;
 657
 658 }
 659 #endif