apt-pkg/deb/debmetaindex.cc

   1 #include <config.h>
   2
   3 #include <apt-pkg/error.h>
   4 #include <apt-pkg/debmetaindex.h>
   5 #include <apt-pkg/debindexfile.h>
   6 #include <apt-pkg/strutl.h>
   7 #include <apt-pkg/fileutl.h>
   8 #include <apt-pkg/acquire-item.h>
   9 #include <apt-pkg/configuration.h>
  10 #include <apt-pkg/aptconfiguration.h>
  11 #include <apt-pkg/sourcelist.h>
  12 #include <apt-pkg/hashes.h>
  13 #include <apt-pkg/metaindex.h>
  14 #include <apt-pkg/pkgcachegen.h>
  15 #include <apt-pkg/tagfile.h>
  16 #include <apt-pkg/gpgv.h>
  17 #include <apt-pkg/macros.h>
  18
  19 #include <map>
  20 #include <string>
  21 #include <utility>
  22 #include <vector>
  23 #include <algorithm>
  24 #include <sstream>
  25
  26 #include <sys/stat.h>
  27 #include <string.h>
  28
  29 #include <apti18n.h>
  30
  31 class APT_HIDDEN debReleaseIndexPrivate                                 /*{{{*/
  32 {
  33    public:
  34    struct APT_HIDDEN debSectionEntry
  35    {
  36       std::string const sourcesEntry;
  37       std::string const Name;
  38       std::vector<std::string> const Targets;
  39       std::vector<std::string> const Architectures;
  40       std::vector<std::string> const Languages;
  41       bool const UsePDiffs;
  42       std::string const UseByHash;
  43    };
  44
  45    std::vector<debSectionEntry> DebEntries;
  46    std::vector<debSectionEntry> DebSrcEntries;
  47
  48    metaIndex::TriState CheckValidUntil;
  49    time_t ValidUntilMin;
  50    time_t ValidUntilMax;
  51
  52    std::vector<std::string> Architectures;
  53    std::vector<std::string> NoSupportForAll;
  54
  55    debReleaseIndexPrivate() : CheckValidUntil(metaIndex::TRI_UNSET), ValidUntilMin(0), ValidUntilMax(0) {}
  56 };
  57                                                                         /*}}}*/
  58 // ReleaseIndex::MetaIndex* - display helpers                           /*{{{*/
  59 std::string debReleaseIndex::MetaIndexInfo(const char *Type) const
  60 {
  61    std::string Info = ::URI::ArchiveOnly(URI) + ' ';
  62    if (Dist[Dist.size() - 1] == '/')
  63    {
  64       if (Dist != "/")
  65          Info += Dist;
  66    }
  67    else
  68       Info += Dist;
  69    Info += " ";
  70    Info += Type;
  71    return Info;
  72 }
  73 std::string debReleaseIndex::Describe() const
  74 {
  75    return MetaIndexInfo("Release");
  76 }
  77
  78 std::string debReleaseIndex::MetaIndexFile(const char *Type) const
  79 {
  80    return _config->FindDir("Dir::State::lists") +
  81       URItoFileName(MetaIndexURI(Type));
  82 }
  83
  84 std::string debReleaseIndex::MetaIndexURI(const char *Type) const
  85 {
  86    std::string Res;
  87
  88    if (Dist == "/")
  89       Res = URI;
  90    else if (Dist[Dist.size()-1] == '/')
  91       Res = URI + Dist;
  92    else
  93       Res = URI + "dists/" + Dist + "/";
  94
  95    Res += Type;
  96    return Res;
  97 }
  98                                                                         /*}}}*/
  99 // ReleaseIndex Con- and Destructors                                    /*{{{*/
 100 debReleaseIndex::debReleaseIndex(std::string const &URI, std::string const &Dist) :
 101                                         metaIndex(URI, Dist, "deb"), d(new debReleaseIndexPrivate())
 102 {}
 103 debReleaseIndex::debReleaseIndex(std::string const &URI, std::string const &Dist, bool const pTrusted) :
 104                                         metaIndex(URI, Dist, "deb"), d(new debReleaseIndexPrivate())
 105 {
 106    Trusted = pTrusted ? TRI_YES : TRI_NO;
 107 }
 108 debReleaseIndex::~debReleaseIndex() {
 109    if (d != NULL)
 110       delete d;
 111 }
 112                                                                         /*}}}*/
 113 // ReleaseIndex::GetIndexTargets                                        /*{{{*/
 114 static void GetIndexTargetsFor(char const * const Type, std::string const &URI, std::string const &Dist,
 115       std::vector<debReleaseIndexPrivate::debSectionEntry> const &entries,
 116       std::vector<IndexTarget> &IndexTargets)
 117 {
 118    bool const flatArchive = (Dist[Dist.length() - 1] == '/');
 119    std::string baseURI = URI;
 120    if (flatArchive)
 121    {
 122       if (Dist != "/")
 123          baseURI += Dist;
 124    }
 125    else
 126       baseURI += "dists/" + Dist + "/";
 127    std::string const Release = (Dist == "/") ? "" : Dist;
 128    std::string const Site = ::URI::ArchiveOnly(URI);
 129
 130    std::string DefCompressionTypes;
 131    {
 132       std::vector<std::string> types = APT::Configuration::getCompressionTypes();
 133       if (types.empty() == false)
 134       {
 135          std::ostringstream os;
 136          std::copy(types.begin(), types.end()-1, std::ostream_iterator<std::string>(os, " "));
 137          os << *types.rbegin();
 138          DefCompressionTypes = os.str();
 139       }
 140    }
 141    std::string DefKeepCompressedAs;
 142    {
 143       std::vector<APT::Configuration::Compressor> comps = APT::Configuration::getCompressors();
 144       if (comps.empty() == false)
 145       {
 146          std::sort(comps.begin(), comps.end(),
 147                [](APT::Configuration::Compressor const &a, APT::Configuration::Compressor const &b) { return a.Cost < b.Cost; });
 148          std::ostringstream os;
 149          for (auto const &c : comps)
 150             if (c.Cost != 0)
 151                os << c.Extension.substr(1) << ' ';
 152          DefKeepCompressedAs = os.str();
 153       }
 154       DefKeepCompressedAs += "uncompressed";
 155    }
 156
 157    std::vector<std::string> const NativeArchs = { _config->Find("APT::Architecture"), "all" };
 158    bool const GzipIndex = _config->FindB("Acquire::GzipIndexes", false);
 159    for (std::vector<debReleaseIndexPrivate::debSectionEntry>::const_iterator E = entries.begin(); E != entries.end(); ++E)
 160    {
 161       for (std::vector<std::string>::const_iterator T = E->Targets.begin(); T != E->Targets.end(); ++T)
 162       {
 163 #define APT_T_CONFIG_STR(X, Y) _config->Find(std::string("Acquire::IndexTargets::") + Type  + "::" + *T + "::" + (X), (Y))
 164 #define APT_T_CONFIG_BOOL(X, Y) _config->FindB(std::string("Acquire::IndexTargets::") + Type  + "::" + *T + "::" + (X), (Y))
 165          std::string const tplMetaKey = APT_T_CONFIG_STR(flatArchive ? "flatMetaKey" : "MetaKey", "");
 166          std::string const tplShortDesc = APT_T_CONFIG_STR("ShortDescription", "");
 167          std::string const tplLongDesc = "$(SITE) " + APT_T_CONFIG_STR(flatArchive ? "flatDescription" : "Description", "");
 168          bool const IsOptional = APT_T_CONFIG_BOOL("Optional", true);
 169          bool const KeepCompressed = APT_T_CONFIG_BOOL("KeepCompressed", GzipIndex);
 170          bool const DefaultEnabled = APT_T_CONFIG_BOOL("DefaultEnabled", true);
 171          bool const UsePDiffs = APT_T_CONFIG_BOOL("PDiffs", E->UsePDiffs);
 172          std::string const UseByHash = APT_T_CONFIG_STR("By-Hash", E->UseByHash);
 173          std::string const CompressionTypes = APT_T_CONFIG_STR("CompressionTypes", DefCompressionTypes);
 174          std::string KeepCompressedAs = APT_T_CONFIG_STR("KeepCompressedAs", "");
 175          std::string const FallbackOf = APT_T_CONFIG_STR("Fallback-Of", "");
 176 #undef APT_T_CONFIG_BOOL
 177 #undef APT_T_CONFIG_STR
 178          if (tplMetaKey.empty())
 179             continue;
 180
 181          if (KeepCompressedAs.empty())
 182             KeepCompressedAs = DefKeepCompressedAs;
 183          else
 184          {
 185             std::vector<std::string> const defKeep = VectorizeString(DefKeepCompressedAs, ' ');
 186             std::vector<std::string> const valKeep = VectorizeString(KeepCompressedAs, ' ');
 187             std::vector<std::string> keep;
 188             for (auto const &val : valKeep)
 189             {
 190                if (val.empty())
 191                   continue;
 192                if (std::find(defKeep.begin(), defKeep.end(), val) == defKeep.end())
 193                   continue;
 194                keep.push_back(val);
 195             }
 196             if (std::find(keep.begin(), keep.end(), "uncompressed") == keep.end())
 197                keep.push_back("uncompressed");
 198             std::ostringstream os;
 199             std::copy(keep.begin(), keep.end()-1, std::ostream_iterator<std::string>(os, " "));
 200             os << *keep.rbegin();
 201             KeepCompressedAs = os.str();
 202          }
 203
 204          for (std::vector<std::string>::const_iterator L = E->Languages.begin(); L != E->Languages.end(); ++L)
 205          {
 206             if (*L == "none" && tplMetaKey.find("$(LANGUAGE)") != std::string::npos)
 207                continue;
 208
 209             for (std::vector<std::string>::const_iterator A = E->Architectures.begin(); A != E->Architectures.end(); ++A)
 210             {
 211                for (auto const &NativeArch: NativeArchs)
 212                {
 213                   constexpr static auto BreakPoint = "$(NATIVE_ARCHITECTURE)";
 214                   // available in templates
 215                   std::map<std::string, std::string> Options;
 216                   Options.insert(std::make_pair("SITE", Site));
 217                   Options.insert(std::make_pair("RELEASE", Release));
 218                   if (tplMetaKey.find("$(COMPONENT)") != std::string::npos)
 219                      Options.insert(std::make_pair("COMPONENT", E->Name));
 220                   if (tplMetaKey.find("$(LANGUAGE)") != std::string::npos)
 221                      Options.insert(std::make_pair("LANGUAGE", *L));
 222                   if (tplMetaKey.find("$(ARCHITECTURE)") != std::string::npos)
 223                      Options.insert(std::make_pair("ARCHITECTURE", *A));
 224                   else if (tplMetaKey.find("$(NATIVE_ARCHITECTURE)") != std::string::npos)
 225                      Options.insert(std::make_pair("ARCHITECTURE", NativeArch));
 226                   if (tplMetaKey.find("$(NATIVE_ARCHITECTURE)") != std::string::npos)
 227                      Options.insert(std::make_pair("NATIVE_ARCHITECTURE", NativeArch));
 228
 229                   std::string MetaKey = tplMetaKey;
 230                   std::string ShortDesc = tplShortDesc;
 231                   std::string LongDesc = tplLongDesc;
 232                   for (std::map<std::string, std::string>::const_iterator O = Options.begin(); O != Options.end(); ++O)
 233                   {
 234                      MetaKey = SubstVar(MetaKey, std::string("$(") + O->first + ")", O->second);
 235                      ShortDesc = SubstVar(ShortDesc, std::string("$(") + O->first + ")", O->second);
 236                      LongDesc = SubstVar(LongDesc, std::string("$(") + O->first + ")", O->second);
 237                   }
 238
 239                   {
 240                      auto const dup = std::find_if(IndexTargets.begin(), IndexTargets.end(), [&](IndexTarget const &IT) {
 241                         return MetaKey == IT.MetaKey && baseURI == IT.Option(IndexTarget::BASE_URI) &&
 242                            E->sourcesEntry == IT.Option(IndexTarget::SOURCESENTRY) && *T == IT.Option(IndexTarget::CREATED_BY);
 243                      });
 244                      if (dup != IndexTargets.end())
 245                      {
 246                         if (tplMetaKey.find(BreakPoint) == std::string::npos)
 247                            break;
 248                         continue;
 249                      }
 250                   }
 251
 252                   {
 253                      auto const dup = std::find_if(IndexTargets.begin(), IndexTargets.end(), [&](IndexTarget const &IT) {
 254                         return MetaKey == IT.MetaKey && baseURI == IT.Option(IndexTarget::BASE_URI) &&
 255                            E->sourcesEntry == IT.Option(IndexTarget::SOURCESENTRY) && *T != IT.Option(IndexTarget::CREATED_BY);
 256                         });
 257                      if (dup != IndexTargets.end())
 258                      {
 259                         std::string const dupT = dup->Option(IndexTarget::CREATED_BY);
 260                         std::string const dupEntry = dup->Option(IndexTarget::SOURCESENTRY);
 261                         //TRANSLATOR: an identifier like Packages; Releasefile key indicating
 262                         // a file like main/binary-amd64/Packages; another identifier like Contents;
 263                         // filename and linenumber of the sources.list entry currently parsed
 264                         _error->Warning(_("Target %s wants to acquire the same file (%s) as %s from source %s"),
 265                               T->c_str(), MetaKey.c_str(), dupT.c_str(), dupEntry.c_str());
 266                         if (tplMetaKey.find(BreakPoint) == std::string::npos)
 267                            break;
 268                         continue;
 269                      }
 270                   }
 271
 272                   {
 273                      auto const dup = std::find_if(IndexTargets.begin(), IndexTargets.end(), [&](IndexTarget const &T) {
 274                         return MetaKey == T.MetaKey && baseURI == T.Option(IndexTarget::BASE_URI) &&
 275                            E->sourcesEntry != T.Option(IndexTarget::SOURCESENTRY);
 276                      });
 277                      if (dup != IndexTargets.end())
 278                      {
 279                         std::string const dupEntry = dup->Option(IndexTarget::SOURCESENTRY);
 280                         //TRANSLATOR: an identifier like Packages; Releasefile key indicating
 281                         // a file like main/binary-amd64/Packages; filename and linenumber of
 282                         // two sources.list entries
 283                         _error->Warning(_("Target %s (%s) is configured multiple times in %s and %s"),
 284                               T->c_str(), MetaKey.c_str(), dupEntry.c_str(), E->sourcesEntry.c_str());
 285                         if (tplMetaKey.find(BreakPoint) == std::string::npos)
 286                            break;
 287                         continue;
 288                      }
 289                   }
 290
 291                   // not available in templates, but in the indextarget
 292                   Options.insert(std::make_pair("BASE_URI", baseURI));
 293                   Options.insert(std::make_pair("REPO_URI", URI));
 294                   Options.insert(std::make_pair("TARGET_OF", Type));
 295                   Options.insert(std::make_pair("CREATED_BY", *T));
 296                   Options.insert(std::make_pair("FALLBACK_OF", FallbackOf));
 297                   Options.insert(std::make_pair("PDIFFS", UsePDiffs ? "yes" : "no"));
 298                   Options.insert(std::make_pair("BY_HASH", UseByHash));
 299                   Options.insert(std::make_pair("DEFAULTENABLED", DefaultEnabled ? "yes" : "no"));
 300                   Options.insert(std::make_pair("COMPRESSIONTYPES", CompressionTypes));
 301                   Options.insert(std::make_pair("KEEPCOMPRESSEDAS", KeepCompressedAs));
 302                   Options.insert(std::make_pair("SOURCESENTRY", E->sourcesEntry));
 303
 304                   bool IsOpt = IsOptional;
 305                   if (IsOpt == false)
 306                   {
 307                      auto const arch = Options.find("ARCHITECTURE");
 308                      if (arch != Options.end() && arch->second == "all")
 309                         IsOpt = true;
 310                   }
 311
 312                   IndexTarget Target(
 313                         MetaKey,
 314                         ShortDesc,
 315                         LongDesc,
 316                         Options.find("BASE_URI")->second + MetaKey,
 317                         IsOpt,
 318                         KeepCompressed,
 319                         Options
 320                         );
 321                   IndexTargets.push_back(Target);
 322
 323                   if (tplMetaKey.find(BreakPoint) == std::string::npos)
 324                      break;
 325                }
 326
 327                if (tplMetaKey.find("$(ARCHITECTURE)") == std::string::npos)
 328                   break;
 329
 330             }
 331
 332             if (tplMetaKey.find("$(LANGUAGE)") == std::string::npos)
 333                break;
 334
 335          }
 336
 337       }
 338    }
 339 }
 340 std::vector<IndexTarget> debReleaseIndex::GetIndexTargets() const
 341 {
 342    std::vector<IndexTarget> IndexTargets;
 343    GetIndexTargetsFor("deb-src", URI, Dist, d->DebSrcEntries, IndexTargets);
 344    GetIndexTargetsFor("deb", URI, Dist, d->DebEntries, IndexTargets);
 345    return IndexTargets;
 346 }
 347                                                                         /*}}}*/
 348 void debReleaseIndex::AddComponent(std::string const &sourcesEntry,     /*{{{*/
 349          bool const isSrc, std::string const &Name,
 350          std::vector<std::string> const &Targets,
 351          std::vector<std::string> const &Architectures,
 352          std::vector<std::string> Languages,
 353          bool const usePDiffs, std::string const &useByHash)
 354 {
 355    if (Languages.empty() == true)
 356       Languages.push_back("none");
 357    debReleaseIndexPrivate::debSectionEntry const entry = {
 358       sourcesEntry, Name, Targets, Architectures, Languages, usePDiffs, useByHash
 359    };
 360    if (isSrc)
 361       d->DebSrcEntries.push_back(entry);
 362    else
 363       d->DebEntries.push_back(entry);
 364 }
 365                                                                         /*}}}*/
 366
 367 bool debReleaseIndex::Load(std::string const &Filename, std::string * const ErrorText)/*{{{*/
 368 {
 369    LoadedSuccessfully = TRI_NO;
 370    FileFd Fd;
 371    if (OpenMaybeClearSignedFile(Filename, Fd) == false)
 372       return false;
 373
 374    pkgTagFile TagFile(&Fd, Fd.Size());
 375    if (Fd.IsOpen() == false || Fd.Failed())
 376    {
 377       if (ErrorText != NULL)
 378          strprintf(*ErrorText, _("Unable to parse Release file %s"),Filename.c_str());
 379       return false;
 380    }
 381
 382    pkgTagSection Section;
 383    const char *Start, *End;
 384    if (TagFile.Step(Section) == false)
 385    {
 386       if (ErrorText != NULL)
 387          strprintf(*ErrorText, _("No sections in Release file %s"), Filename.c_str());
 388       return false;
 389    }
 390    // FIXME: find better tag name
 391    SupportsAcquireByHash = Section.FindB("Acquire-By-Hash", false);
 392
 393    Suite = Section.FindS("Suite");
 394    Codename = Section.FindS("Codename");
 395    {
 396       std::string const archs = Section.FindS("Architectures");
 397       if (archs.empty() == false)
 398          d->Architectures = VectorizeString(archs, ' ');
 399    }
 400    {
 401       std::string const targets = Section.FindS("No-Support-for-Architecture-all");
 402       if (targets.empty() == false)
 403          d->NoSupportForAll = VectorizeString(targets, ' ');
 404    }
 405
 406    bool FoundHashSum = false;
 407    bool FoundStrongHashSum = false;
 408    auto const SupportedHashes = HashString::SupportedHashes();
 409    for (int i=0; SupportedHashes[i] != NULL; i++)
 410    {
 411       if (!Section.Find(SupportedHashes[i], Start, End))
 412          continue;
 413
 414       std::string Name;
 415       std::string Hash;
 416       unsigned long long Size;
 417       while (Start < End)
 418       {
 419          if (!parseSumData(Start, End, Name, Hash, Size))
 420             return false;
 421
 422          HashString const hs(SupportedHashes[i], Hash);
 423          if (Entries.find(Name) == Entries.end())
 424          {
 425             metaIndex::checkSum *Sum = new metaIndex::checkSum;
 426             Sum->MetaKeyFilename = Name;
 427             Sum->Size = Size;
 428             Sum->Hashes.FileSize(Size);
 429             APT_IGNORE_DEPRECATED(Sum->Hash = hs;)
 430             Entries[Name] = Sum;
 431          }
 432          Entries[Name]->Hashes.push_back(hs);
 433          FoundHashSum = true;
 434          if (FoundStrongHashSum == false && hs.usable() == true)
 435             FoundStrongHashSum = true;
 436       }
 437    }
 438
 439    if(FoundHashSum == false)
 440    {
 441       if (ErrorText != NULL)
 442          strprintf(*ErrorText, _("No Hash entry in Release file %s"), Filename.c_str());
 443       return false;
 444    }
 445    if(FoundStrongHashSum == false)
 446    {
 447       if (ErrorText != NULL)
 448          strprintf(*ErrorText, _("No Hash entry in Release file %s which is considered strong enough for security purposes"), Filename.c_str());
 449       return false;
 450    }
 451
 452    std::string const StrDate = Section.FindS("Date");
 453    if (RFC1123StrToTime(StrDate.c_str(), Date) == false)
 454    {
 455       _error->Warning( _("Invalid '%s' entry in Release file %s"), "Date", Filename.c_str());
 456       Date = 0;
 457    }
 458
 459    bool CheckValidUntil = _config->FindB("Acquire::Check-Valid-Until", true);
 460    if (d->CheckValidUntil == metaIndex::TRI_NO)
 461       CheckValidUntil = false;
 462    else if (d->CheckValidUntil == metaIndex::TRI_YES)
 463       CheckValidUntil = true;
 464
 465    if (CheckValidUntil == true)
 466    {
 467       std::string const Label = Section.FindS("Label");
 468       std::string const StrValidUntil = Section.FindS("Valid-Until");
 469
 470       // if we have a Valid-Until header in the Release file, use it as default
 471       if (StrValidUntil.empty() == false)
 472       {
 473          if(RFC1123StrToTime(StrValidUntil.c_str(), ValidUntil) == false)
 474          {
 475             if (ErrorText != NULL)
 476                strprintf(*ErrorText, _("Invalid '%s' entry in Release file %s"), "Valid-Until", Filename.c_str());
 477             return false;
 478          }
 479       }
 480       // get the user settings for this archive and use what expires earlier
 481       time_t MaxAge = d->ValidUntilMax;
 482       if (MaxAge == 0)
 483       {
 484          MaxAge = _config->FindI("Acquire::Max-ValidTime", 0);
 485          if (Label.empty() == false)
 486             MaxAge = _config->FindI(("Acquire::Max-ValidTime::" + Label).c_str(), MaxAge);
 487       }
 488       time_t MinAge = d->ValidUntilMin;
 489       if (MinAge == 0)
 490       {
 491          MinAge = _config->FindI("Acquire::Min-ValidTime", 0);
 492          if (Label.empty() == false)
 493             MinAge = _config->FindI(("Acquire::Min-ValidTime::" + Label).c_str(), MinAge);
 494       }
 495
 496       if (MinAge != 0 || ValidUntil != 0 || MaxAge != 0)
 497       {
 498          if (MinAge != 0 && ValidUntil != 0) {
 499             time_t const min_date = Date + MinAge;
 500             if (ValidUntil < min_date)
 501                ValidUntil = min_date;
 502          }
 503          if (MaxAge != 0 && Date != 0) {
 504             time_t const max_date = Date + MaxAge;
 505             if (ValidUntil == 0 || ValidUntil > max_date)
 506                ValidUntil = max_date;
 507          }
 508       }
 509    }
 510
 511    /* as the Release file is parsed only after it was verified, the Signed-By field
 512       does not effect the current, but the "next" Release file */
 513    auto Sign = Section.FindS("Signed-By");
 514    if (Sign.empty() == false)
 515    {
 516       std::transform(Sign.begin(), Sign.end(), Sign.begin(), [&](char const c) {
 517          return (isspace(c) == 0) ? c : ',';
 518       });
 519       auto fingers = VectorizeString(Sign, ',');
 520       std::transform(fingers.begin(), fingers.end(), fingers.begin(), [&](std::string finger) {
 521          std::transform(finger.begin(), finger.end(), finger.begin(), ::toupper);
 522          if (finger.length() != 40 || finger.find_first_not_of("0123456789ABCDEF") != std::string::npos)
 523          {
 524             if (ErrorText != NULL)
 525                strprintf(*ErrorText, _("Invalid '%s' entry in Release file %s"), "Signed-By", Filename.c_str());
 526             return std::string();
 527          }
 528          return finger;
 529       });
 530       if (fingers.empty() == false && std::find(fingers.begin(), fingers.end(), "") == fingers.end())
 531       {
 532          std::stringstream os;
 533          std::copy(fingers.begin(), fingers.end(), std::ostream_iterator<std::string>(os, ","));
 534          SignedBy = os.str();
 535       }
 536    }
 537
 538    LoadedSuccessfully = TRI_YES;
 539    return true;
 540 }
 541                                                                         /*}}}*/
 542 metaIndex * debReleaseIndex::UnloadedClone() const                      /*{{{*/
 543 {
 544    if (Trusted == TRI_NO)
 545       return new debReleaseIndex(URI, Dist, false);
 546    else if (Trusted == TRI_YES)
 547       return new debReleaseIndex(URI, Dist, true);
 548    else
 549       return new debReleaseIndex(URI, Dist);
 550 }
 551                                                                         /*}}}*/
 552 bool debReleaseIndex::parseSumData(const char *&Start, const char *End, /*{{{*/
 553                                    std::string &Name, std::string &Hash, unsigned long long &Size)
 554 {
 555    Name = "";
 556    Hash = "";
 557    Size = 0;
 558    /* Skip over the first blank */
 559    while ((*Start == '\t' || *Start == ' ' || *Start == '\n' || *Start == '\r')
 560           && Start < End)
 561       Start++;
 562    if (Start >= End)
 563       return false;
 564
 565    /* Move EntryEnd to the end of the first entry (the hash) */
 566    const char *EntryEnd = Start;
 567    while ((*EntryEnd != '\t' && *EntryEnd != ' ')
 568           && EntryEnd < End)
 569       EntryEnd++;
 570    if (EntryEnd == End)
 571       return false;
 572
 573    Hash.append(Start, EntryEnd-Start);
 574
 575    /* Skip over intermediate blanks */
 576    Start = EntryEnd;
 577    while (*Start == '\t' || *Start == ' ')
 578       Start++;
 579    if (Start >= End)
 580       return false;
 581
 582    EntryEnd = Start;
 583    /* Find the end of the second entry (the size) */
 584    while ((*EntryEnd != '\t' && *EntryEnd != ' ' )
 585           && EntryEnd < End)
 586       EntryEnd++;
 587    if (EntryEnd == End)
 588       return false;
 589
 590    Size = strtoull (Start, NULL, 10);
 591
 592    /* Skip over intermediate blanks */
 593    Start = EntryEnd;
 594    while (*Start == '\t' || *Start == ' ')
 595       Start++;
 596    if (Start >= End)
 597       return false;
 598
 599    EntryEnd = Start;
 600    /* Find the end of the third entry (the filename) */
 601    while ((*EntryEnd != '\t' && *EntryEnd != ' ' &&
 602            *EntryEnd != '\n' && *EntryEnd != '\r')
 603           && EntryEnd < End)
 604       EntryEnd++;
 605
 606    Name.append(Start, EntryEnd-Start);
 607    Start = EntryEnd; //prepare for the next round
 608    return true;
 609 }
 610                                                                         /*}}}*/
 611
 612 bool debReleaseIndex::GetIndexes(pkgAcquire *Owner, bool const &GetAll)/*{{{*/
 613 {
 614 #define APT_TARGET(X) IndexTarget("", X, MetaIndexInfo(X), MetaIndexURI(X), false, false, std::map<std::string,std::string>())
 615    pkgAcqMetaClearSig * const TransactionManager = new pkgAcqMetaClearSig(Owner,
 616          APT_TARGET("InRelease"), APT_TARGET("Release"), APT_TARGET("Release.gpg"), this);
 617 #undef APT_TARGET
 618    // special case for --print-uris
 619    if (GetAll)
 620       for (auto const &Target: GetIndexTargets())
 621          if (Target.Option(IndexTarget::FALLBACK_OF).empty())
 622             new pkgAcqIndex(Owner, TransactionManager, Target);
 623
 624    return true;
 625 }
 626                                                                         /*}}}*/
 627 // ReleaseIndex::Set* TriState options                                  /*{{{*/
 628 bool debReleaseIndex::SetTrusted(TriState const pTrusted)
 629 {
 630    if (Trusted == TRI_UNSET)
 631       Trusted = pTrusted;
 632    else if (Trusted != pTrusted)
 633       // TRANSLATOR: The first is an option name from sources.list manpage, the other two URI and Suite
 634       return _error->Error(_("Conflicting values set for option %s regarding source %s %s"), "Trusted", URI.c_str(), Dist.c_str());
 635    return true;
 636 }
 637 bool debReleaseIndex::SetCheckValidUntil(TriState const pCheckValidUntil)
 638 {
 639    if (d->CheckValidUntil == TRI_UNSET)
 640       d->CheckValidUntil = pCheckValidUntil;
 641    else if (d->CheckValidUntil != pCheckValidUntil)
 642       return _error->Error(_("Conflicting values set for option %s regarding source %s %s"), "Check-Valid-Until", URI.c_str(), Dist.c_str());
 643    return true;
 644 }
 645 bool debReleaseIndex::SetValidUntilMin(time_t const Valid)
 646 {
 647    if (d->ValidUntilMin == 0)
 648       d->ValidUntilMin = Valid;
 649    else if (d->ValidUntilMin != Valid)
 650       return _error->Error(_("Conflicting values set for option %s regarding source %s %s"), "Min-ValidTime", URI.c_str(), Dist.c_str());
 651    return true;
 652 }
 653 bool debReleaseIndex::SetValidUntilMax(time_t const Valid)
 654 {
 655    if (d->ValidUntilMax == 0)
 656       d->ValidUntilMax = Valid;
 657    else if (d->ValidUntilMax != Valid)
 658       return _error->Error(_("Conflicting values set for option %s regarding source %s %s"), "Max-ValidTime", URI.c_str(), Dist.c_str());
 659    return true;
 660 }
 661 bool debReleaseIndex::SetSignedBy(std::string const &pSignedBy)
 662 {
 663    if (SignedBy.empty() == true && pSignedBy.empty() == false)
 664    {
 665       if (pSignedBy[0] == '/') // no check for existence as we could be chrooting later or such things
 666          SignedBy = pSignedBy; // absolute path to a keyring file
 667       else
 668       {
 669          // we could go all fancy and allow short/long/string matches as gpgv/apt-key does,
 670          // but fingerprints are harder to fake than the others and this option is set once,
 671          // not interactively all the time so easy to type is not really a concern.
 672          auto fingers = VectorizeString(pSignedBy, ',');
 673          std::transform(fingers.begin(), fingers.end(), fingers.begin(), [&](std::string finger) {
 674             std::transform(finger.begin(), finger.end(), finger.begin(), ::toupper);
 675             if (finger.length() != 40 || finger.find_first_not_of("0123456789ABCDEF") != std::string::npos)
 676             {
 677                _error->Error(_("Invalid value set for option %s regarding source %s %s (%s)"), "Signed-By", URI.c_str(), Dist.c_str(), "not a fingerprint");
 678                return std::string();
 679             }
 680             return finger;
 681          });
 682          std::stringstream os;
 683          std::copy(fingers.begin(), fingers.end(), std::ostream_iterator<std::string>(os, ","));
 684          SignedBy = os.str();
 685       }
 686    }
 687    else if (SignedBy != pSignedBy)
 688       return _error->Error(_("Conflicting values set for option %s regarding source %s %s"), "Signed-By", URI.c_str(), Dist.c_str());
 689    return true;
 690 }
 691                                                                         /*}}}*/
 692 // ReleaseIndex::IsTrusted                                              /*{{{*/
 693 bool debReleaseIndex::IsTrusted() const
 694 {
 695    if (Trusted == TRI_YES)
 696       return true;
 697    else if (Trusted == TRI_NO)
 698       return false;
 699
 700
 701    if(_config->FindB("APT::Authentication::TrustCDROM", false))
 702       if(URI.substr(0,strlen("cdrom:")) == "cdrom:")
 703          return true;
 704
 705    if (FileExists(MetaIndexFile("Release.gpg")))
 706       return true;
 707
 708    return FileExists(MetaIndexFile("InRelease"));
 709 }
 710                                                                         /*}}}*/
 711 bool debReleaseIndex::IsArchitectureSupported(std::string const &arch) const/*{{{*/
 712 {
 713    if (d->Architectures.empty())
 714       return true;
 715    return std::find(d->Architectures.begin(), d->Architectures.end(), arch) != d->Architectures.end();
 716 }
 717                                                                         /*}}}*/
 718 bool debReleaseIndex::IsArchitectureAllSupportedFor(IndexTarget const &target) const/*{{{*/
 719 {
 720    if (d->NoSupportForAll.empty())
 721       return true;
 722    return std::find(d->NoSupportForAll.begin(), d->NoSupportForAll.end(), target.Option(IndexTarget::CREATED_BY)) == d->NoSupportForAll.end();
 723 }
 724                                                                         /*}}}*/
 725 std::vector <pkgIndexFile *> *debReleaseIndex::GetIndexFiles()          /*{{{*/
 726 {
 727    if (Indexes != NULL)
 728       return Indexes;
 729
 730    Indexes = new std::vector<pkgIndexFile*>();
 731    bool const istrusted = IsTrusted();
 732    for (auto const &T: GetIndexTargets())
 733    {
 734       std::string const TargetName = T.Option(IndexTarget::CREATED_BY);
 735       if (TargetName == "Packages")
 736          Indexes->push_back(new debPackagesIndex(T, istrusted));
 737       else if (TargetName == "Sources")
 738          Indexes->push_back(new debSourcesIndex(T, istrusted));
 739       else if (TargetName == "Translations")
 740          Indexes->push_back(new debTranslationsIndex(T));
 741    }
 742    return Indexes;
 743 }
 744                                                                         /*}}}*/
 745
 746 static bool ReleaseFileName(debReleaseIndex const * const That, std::string &ReleaseFile)/*{{{*/
 747 {
 748    ReleaseFile = That->MetaIndexFile("InRelease");
 749    bool releaseExists = false;
 750    if (FileExists(ReleaseFile) == true)
 751       releaseExists = true;
 752    else
 753    {
 754       ReleaseFile = That->MetaIndexFile("Release");
 755       if (FileExists(ReleaseFile))
 756          releaseExists = true;
 757    }
 758    return releaseExists;
 759 }
 760                                                                         /*}}}*/
 761 bool debReleaseIndex::Merge(pkgCacheGenerator &Gen,OpProgress * /*Prog*/) const/*{{{*/
 762 {
 763    std::string ReleaseFile;
 764    bool const releaseExists = ReleaseFileName(this, ReleaseFile);
 765
 766    ::URI Tmp(URI);
 767    if (Gen.SelectReleaseFile(ReleaseFile, Tmp.Host) == false)
 768       return _error->Error("Problem with SelectReleaseFile %s", ReleaseFile.c_str());
 769
 770    if (releaseExists == false)
 771       return true;
 772
 773    FileFd Rel;
 774    // Beware: The 'Release' file might be clearsigned in case the
 775    // signature for an 'InRelease' file couldn't be checked
 776    if (OpenMaybeClearSignedFile(ReleaseFile, Rel) == false)
 777       return false;
 778
 779    // Store the IMS information
 780    pkgCache::RlsFileIterator File = Gen.GetCurRlsFile();
 781    pkgCacheGenerator::Dynamic<pkgCache::RlsFileIterator> DynFile(File);
 782    // Rel can't be used as this is potentially a temporary file
 783    struct stat Buf;
 784    if (stat(ReleaseFile.c_str(), &Buf) != 0)
 785       return _error->Errno("fstat", "Unable to stat file %s", ReleaseFile.c_str());
 786    File->Size = Buf.st_size;
 787    File->mtime = Buf.st_mtime;
 788
 789    pkgTagFile TagFile(&Rel, Rel.Size());
 790    pkgTagSection Section;
 791    if (Rel.IsOpen() == false || Rel.Failed() || TagFile.Step(Section) == false)
 792       return false;
 793
 794    std::string data;
 795    #define APT_INRELEASE(TYPE, TAG, STORE) \
 796    data = Section.FindS(TAG); \
 797    if (data.empty() == false) \
 798    { \
 799       map_stringitem_t const storage = Gen.StoreString(pkgCacheGenerator::TYPE, data); \
 800       if (storage == 0) return false; \
 801       STORE = storage; \
 802    }
 803    APT_INRELEASE(MIXED, "Suite", File->Archive)
 804    APT_INRELEASE(VERSIONNUMBER, "Version", File->Version)
 805    APT_INRELEASE(MIXED, "Origin", File->Origin)
 806    APT_INRELEASE(MIXED, "Codename", File->Codename)
 807    APT_INRELEASE(MIXED, "Label", File->Label)
 808    #undef APT_INRELEASE
 809    Section.FindFlag("NotAutomatic", File->Flags, pkgCache::Flag::NotAutomatic);
 810    Section.FindFlag("ButAutomaticUpgrades", File->Flags, pkgCache::Flag::ButAutomaticUpgrades);
 811
 812    return true;
 813 }
 814                                                                         /*}}}*/
 815 // ReleaseIndex::FindInCache - Find this index                          /*{{{*/
 816 pkgCache::RlsFileIterator debReleaseIndex::FindInCache(pkgCache &Cache, bool const ModifyCheck) const
 817 {
 818    std::string ReleaseFile;
 819    bool const releaseExists = ReleaseFileName(this, ReleaseFile);
 820
 821    pkgCache::RlsFileIterator File = Cache.RlsFileBegin();
 822    for (; File.end() == false; ++File)
 823    {
 824        if (File->FileName == 0 || ReleaseFile != File.FileName())
 825          continue;
 826
 827        // empty means the file does not exist by "design"
 828        if (ModifyCheck == false || (releaseExists == false && File->Size == 0))
 829           return File;
 830
 831       struct stat St;
 832       if (stat(File.FileName(),&St) != 0)
 833       {
 834          if (_config->FindB("Debug::pkgCacheGen", false))
 835             std::clog << "ReleaseIndex::FindInCache - stat failed on " << File.FileName() << std::endl;
 836          return pkgCache::RlsFileIterator(Cache);
 837       }
 838       if ((unsigned)St.st_size != File->Size || St.st_mtime != File->mtime)
 839       {
 840          if (_config->FindB("Debug::pkgCacheGen", false))
 841             std::clog << "ReleaseIndex::FindInCache - size (" << St.st_size << " <> " << File->Size
 842                         << ") or mtime (" << St.st_mtime << " <> " << File->mtime
 843                         << ") doesn't match for " << File.FileName() << std::endl;
 844          return pkgCache::RlsFileIterator(Cache);
 845       }
 846       return File;
 847    }
 848
 849    return File;
 850 }
 851                                                                         /*}}}*/
 852
 853 static std::vector<std::string> parsePlusMinusOptions(std::string const &Name, /*{{{*/
 854       std::map<std::string, std::string> const &Options, std::vector<std::string> const &defaultValues)
 855 {
 856    std::map<std::string, std::string>::const_iterator val = Options.find(Name);
 857    std::vector<std::string> Values;
 858    if (val != Options.end())
 859       Values = VectorizeString(val->second, ',');
 860    else
 861       Values = defaultValues;
 862
 863    // all is a very special architecture users shouldn't be concerned with explicitly
 864    if (Name == "arch" && std::find(Values.begin(), Values.end(), "all") == Values.end())
 865       Values.push_back("all");
 866
 867    if ((val = Options.find(Name + "+")) != Options.end())
 868    {
 869       std::vector<std::string> const plus = VectorizeString(val->second, ',');
 870       std::copy_if(plus.begin(), plus.end(), std::back_inserter(Values), [&Values](std::string const &v) {
 871          return std::find(Values.begin(), Values.end(), v) == Values.end();
 872       });
 873    }
 874    if ((val = Options.find(Name + "-")) != Options.end())
 875    {
 876       std::vector<std::string> const minus = VectorizeString(val->second, ',');
 877       Values.erase(std::remove_if(Values.begin(), Values.end(), [&minus](std::string const &v) {
 878          return std::find(minus.begin(), minus.end(), v) != minus.end();
 879       }), Values.end());
 880    }
 881    return Values;
 882 }
 883                                                                         /*}}}*/
 884 class APT_HIDDEN debSLTypeDebian : public pkgSourceList::Type           /*{{{*/
 885 {
 886    metaIndex::TriState GetTriStateOption(std::map<std::string, std::string>const &Options, char const * const name) const
 887    {
 888       std::map<std::string, std::string>::const_iterator const opt = Options.find(name);
 889       if (opt != Options.end())
 890          return StringToBool(opt->second, false) ? metaIndex::TRI_YES : metaIndex::TRI_NO;
 891       return metaIndex::TRI_DONTCARE;
 892    }
 893
 894    time_t GetTimeOption(std::map<std::string, std::string>const &Options, char const * const name) const
 895    {
 896       std::map<std::string, std::string>::const_iterator const opt = Options.find(name);
 897       if (opt == Options.end())
 898          return 0;
 899       return strtoull(opt->second.c_str(), NULL, 10);
 900    }
 901
 902    protected:
 903
 904    bool CreateItemInternal(std::vector<metaIndex *> &List, std::string const &URI,
 905                            std::string const &Dist, std::string const &Section,
 906                            bool const &IsSrc, std::map<std::string, std::string> const &Options) const
 907    {
 908       debReleaseIndex *Deb = NULL;
 909       for (std::vector<metaIndex *>::const_iterator I = List.begin();
 910            I != List.end(); ++I)
 911       {
 912          // We only worry about debian entries here
 913          if (strcmp((*I)->GetType(), "deb") != 0)
 914             continue;
 915
 916          /* This check insures that there will be only one Release file
 917             queued for all the Packages files and Sources files it
 918             corresponds to. */
 919          if ((*I)->GetURI() == URI && (*I)->GetDist() == Dist)
 920          {
 921             Deb = dynamic_cast<debReleaseIndex*>(*I);
 922             if (Deb != NULL)
 923                break;
 924          }
 925       }
 926
 927       // No currently created Release file indexes this entry, so we create a new one.
 928       if (Deb == NULL)
 929       {
 930          Deb = new debReleaseIndex(URI, Dist);
 931          List.push_back(Deb);
 932       }
 933
 934       std::vector<std::string> const alltargets = _config->FindVector(std::string("Acquire::IndexTargets::") + Name, "", true);
 935       std::vector<std::string> deftargets;
 936       deftargets.reserve(alltargets.size());
 937       std::copy_if(alltargets.begin(), alltargets.end(), std::back_inserter(deftargets), [&](std::string const &t) {
 938          std::string c = "Acquire::IndexTargets::";
 939          c.append(Name).append("::").append(t).append("::DefaultEnabled");
 940          return _config->FindB(c, true);
 941       });
 942       std::vector<std::string> mytargets = parsePlusMinusOptions("target", Options, deftargets);
 943       for (auto const &target : alltargets)
 944       {
 945          std::map<std::string, std::string>::const_iterator const opt = Options.find(target);
 946          if (opt == Options.end())
 947             continue;
 948          auto const tarItr = std::find(mytargets.begin(), mytargets.end(), target);
 949          bool const optValue = StringToBool(opt->second);
 950          if (optValue == true && tarItr == mytargets.end())
 951             mytargets.push_back(target);
 952          else if (optValue == false && tarItr != mytargets.end())
 953             mytargets.erase(std::remove(mytargets.begin(), mytargets.end(), target), mytargets.end());
 954       }
 955       // if we can't order it in a 1000 steps we give up… probably a cycle
 956       for (auto i = 0; i < 1000; ++i)
 957       {
 958          bool Changed = false;
 959          for (auto t = mytargets.begin(); t != mytargets.end(); ++t)
 960          {
 961             std::string const fallback = _config->Find(std::string("Acquire::IndexTargets::") + Name + "::" + *t + "::Fallback-Of");
 962             if (fallback.empty())
 963                continue;
 964             auto const faller = std::find(mytargets.begin(), mytargets.end(), fallback);
 965             if (faller == mytargets.end() || faller < t)
 966                continue;
 967             Changed = true;
 968             auto const tv = *t;
 969             mytargets.erase(t);
 970             mytargets.emplace_back(tv);
 971          }
 972          if (Changed == false)
 973             break;
 974       }
 975
 976       bool UsePDiffs = _config->FindB("Acquire::PDiffs", true);
 977       {
 978          std::map<std::string, std::string>::const_iterator const opt = Options.find("pdiffs");
 979          if (opt != Options.end())
 980             UsePDiffs = StringToBool(opt->second);
 981       }
 982
 983       std::string UseByHash = _config->Find("APT::Acquire::By-Hash", "yes");
 984       UseByHash = _config->Find("Acquire::By-Hash", UseByHash);
 985       {
 986          std::string const host = ::URI(URI).Host;
 987          UseByHash = _config->Find("APT::Acquire::" + host + "::By-Hash", UseByHash);
 988          UseByHash = _config->Find("Acquire::" + host + "::By-Hash", UseByHash);
 989          std::map<std::string, std::string>::const_iterator const opt = Options.find("by-hash");
 990          if (opt != Options.end())
 991             UseByHash = opt->second;
 992       }
 993
 994       auto const entry = Options.find("sourceslist-entry");
 995       Deb->AddComponent(
 996             entry->second,
 997             IsSrc,
 998             Section,
 999             mytargets,
1000             parsePlusMinusOptions("arch", Options, APT::Configuration::getArchitectures()),
1001             parsePlusMinusOptions("lang", Options, APT::Configuration::getLanguages(true)),
1002             UsePDiffs,
1003             UseByHash
1004             );
1005
1006       if (Deb->SetTrusted(GetTriStateOption(Options, "trusted")) == false ||
1007          Deb->SetCheckValidUntil(GetTriStateOption(Options, "check-valid-until")) == false ||
1008          Deb->SetValidUntilMax(GetTimeOption(Options, "valid-until-max")) == false ||
1009          Deb->SetValidUntilMin(GetTimeOption(Options, "valid-until-min")) == false)
1010          return false;
1011
1012       std::map<std::string, std::string>::const_iterator const signedby = Options.find("signed-by");
1013       if (signedby == Options.end())
1014       {
1015          bool alreadySet = false;
1016          std::string filename;
1017          if (ReleaseFileName(Deb, filename))
1018          {
1019             auto OldDeb = Deb->UnloadedClone();
1020             _error->PushToStack();
1021             OldDeb->Load(filename, nullptr);
1022             bool const goodLoad = _error->PendingError() == false;
1023             _error->RevertToStack();
1024             if (goodLoad)
1025             {
1026                if (OldDeb->GetValidUntil() > 0)
1027                {
1028                   time_t const invalid_since = time(NULL) - OldDeb->GetValidUntil();
1029                   if (invalid_since <= 0)
1030                   {
1031                      Deb->SetSignedBy(OldDeb->GetSignedBy());
1032                      alreadySet = true;
1033                   }
1034                }
1035             }
1036             delete OldDeb;
1037          }
1038          if (alreadySet == false && Deb->SetSignedBy("") == false)
1039             return false;
1040       }
1041       else
1042       {
1043          if (Deb->SetSignedBy(signedby->second) == false)
1044             return false;
1045       }
1046
1047       return true;
1048    }
1049
1050    debSLTypeDebian(char const * const Name, char const * const Label) : Type(Name, Label)
1051    {
1052    }
1053 };
1054                                                                         /*}}}*/
1055 class APT_HIDDEN debSLTypeDeb : public debSLTypeDebian                  /*{{{*/
1056 {
1057    public:
1058
1059    bool CreateItem(std::vector<metaIndex *> &List, std::string const &URI,
1060                    std::string const &Dist, std::string const &Section,
1061                    std::map<std::string, std::string> const &Options) const APT_OVERRIDE
1062    {
1063       return CreateItemInternal(List, URI, Dist, Section, false, Options);
1064    }
1065
1066    debSLTypeDeb() : debSLTypeDebian("deb", "Debian binary tree")
1067    {
1068    }
1069 };
1070                                                                         /*}}}*/
1071 class APT_HIDDEN debSLTypeDebSrc : public debSLTypeDebian               /*{{{*/
1072 {
1073    public:
1074
1075    bool CreateItem(std::vector<metaIndex *> &List, std::string const &URI,
1076                    std::string const &Dist, std::string const &Section,
1077                    std::map<std::string, std::string> const &Options) const APT_OVERRIDE
1078    {
1079       return CreateItemInternal(List, URI, Dist, Section, true, Options);
1080    }
1081
1082    debSLTypeDebSrc() : debSLTypeDebian("deb-src", "Debian source tree")
1083    {
1084    }
1085 };
1086                                                                         /*}}}*/
1087
1088 APT_HIDDEN debSLTypeDeb _apt_DebType;
1089 APT_HIDDEN debSLTypeDebSrc _apt_DebSrcType;