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