// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: acquire-item.cc,v 1.46.2.9 2004/01/16 18:51:11 mdz Exp $ /* ###################################################################### Acquire Item - Item to acquire Each item can download to exactly one file at a time. This means you cannot create an item that fetches two uri's to two files at the same time. The pkgAcqIndex class creates a second class upon instantiation to fetch the other index files because of this. ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /*}}}*/ using namespace std; static void printHashSumComparison(std::string const &URI, HashStringList const &Expected, HashStringList const &Actual) /*{{{*/ { if (_config->FindB("Debug::Acquire::HashSumMismatch", false) == false) return; std::cerr << std::endl << URI << ":" << std::endl << " Expected Hash: " << std::endl; for (HashStringList::const_iterator hs = Expected.begin(); hs != Expected.end(); ++hs) std::cerr << "\t- " << hs->toStr() << std::endl; std::cerr << " Actual Hash: " << std::endl; for (HashStringList::const_iterator hs = Actual.begin(); hs != Actual.end(); ++hs) std::cerr << "\t- " << hs->toStr() << std::endl; } /*}}}*/ static std::string GetPartialFileName(std::string const &file) /*{{{*/ { std::string DestFile = _config->FindDir("Dir::State::lists") + "partial/"; DestFile += file; return DestFile; } /*}}}*/ static std::string GetPartialFileNameFromURI(std::string const &uri) /*{{{*/ { return GetPartialFileName(URItoFileName(uri)); } /*}}}*/ static std::string GetFinalFileNameFromURI(std::string const &uri) /*{{{*/ { return _config->FindDir("Dir::State::lists") + URItoFileName(uri); } /*}}}*/ static std::string GetKeepCompressedFileName(std::string file, IndexTarget const &Target)/*{{{*/ { if (Target.KeepCompressed == false) return file; std::string const KeepCompressedAs = Target.Option(IndexTarget::KEEPCOMPRESSEDAS); if (KeepCompressedAs.empty() == false) { std::string const ext = KeepCompressedAs.substr(0, KeepCompressedAs.find(' ')); if (ext != "uncompressed") file.append(".").append(ext); } return file; } /*}}}*/ static std::string GetMergeDiffsPatchFileName(std::string const &Final, std::string const &Patch)/*{{{*/ { // rred expects the patch as $FinalFile.ed.$patchname.gz return Final + ".ed." + Patch + ".gz"; } /*}}}*/ static std::string GetDiffsPatchFileName(std::string const &Final) /*{{{*/ { // rred expects the patch as $FinalFile.ed return Final + ".ed"; } /*}}}*/ static std::string GetExistingFilename(std::string const &File) /*{{{*/ { if (RealFileExists(File)) return File; for (auto const &type : APT::Configuration::getCompressorExtensions()) { std::string const Final = File + type; if (RealFileExists(Final)) return Final; } return ""; } /*}}}*/ static std::string GetDiffIndexFileName(std::string const &Name) /*{{{*/ { return Name + ".diff/Index"; } /*}}}*/ static std::string GetDiffIndexURI(IndexTarget const &Target) /*{{{*/ { return Target.URI + ".diff/Index"; } /*}}}*/ static void ReportMirrorFailureToCentral(pkgAcquire::Item const &I, std::string const &FailCode, std::string const &Details)/*{{{*/ { // we only act if a mirror was used at all if(I.UsedMirror.empty()) return; #if 0 std::cerr << "\nReportMirrorFailure: " << UsedMirror << " Uri: " << DescURI() << " FailCode: " << FailCode << std::endl; #endif string const report = _config->Find("Methods::Mirror::ProblemReporting", "/usr/lib/apt/apt-report-mirror-failure"); if(!FileExists(report)) return; std::vector const Args = { report.c_str(), I.UsedMirror.c_str(), I.DescURI().c_str(), FailCode.c_str(), Details.c_str(), NULL }; pid_t pid = ExecFork(); if(pid < 0) { _error->Error("ReportMirrorFailure Fork failed"); return; } else if(pid == 0) { execvp(Args[0], (char**)Args.data()); std::cerr << "Could not exec " << Args[0] << std::endl; _exit(100); } if(!ExecWait(pid, "report-mirror-failure")) _error->Warning("Couldn't report problem to '%s'", report.c_str()); } /*}}}*/ static APT_NONNULL(2) bool MessageInsecureRepository(bool const isError, char const * const msg, std::string const &repo)/*{{{*/ { std::string m; strprintf(m, msg, repo.c_str()); if (isError) { _error->Error("%s", m.c_str()); _error->Notice("%s", _("Updating from such a repository can't be done securely, and is therefore disabled by default.")); } else { _error->Warning("%s", m.c_str()); _error->Notice("%s", _("Data from such a repository can't be authenticated and is therefore potentially dangerous to use.")); } _error->Notice("%s", _("See apt-secure(8) manpage for repository creation and user configuration details.")); return false; } /*}}}*/ // AllowInsecureRepositories /*{{{*/ enum class InsecureType { UNSIGNED, WEAK, NORELEASE }; static bool TargetIsAllowedToBe(IndexTarget const &Target, InsecureType const type) { if (_config->FindB("Acquire::AllowInsecureRepositories")) return true; if (Target.OptionBool(IndexTarget::ALLOW_INSECURE)) return true; switch (type) { case InsecureType::UNSIGNED: break; case InsecureType::NORELEASE: break; case InsecureType::WEAK: if (_config->FindB("Acquire::AllowWeakRepositories")) return true; if (Target.OptionBool(IndexTarget::ALLOW_WEAK)) return true; break; } return false; } static bool APT_NONNULL(3, 4, 5) AllowInsecureRepositories(InsecureType const msg, std::string const &repo, metaIndex const * const MetaIndexParser, pkgAcqMetaClearSig * const TransactionManager, pkgAcquire::Item * const I) { // we skip weak downgrades as its unlikely that a repository gets really weaker – // its more realistic that apt got pickier in a newer version if (msg != InsecureType::WEAK) { std::string const FinalInRelease = TransactionManager->GetFinalFilename(); std::string const FinalReleasegpg = FinalInRelease.substr(0, FinalInRelease.length() - strlen("InRelease")) + "Release.gpg"; if (RealFileExists(FinalReleasegpg) || RealFileExists(FinalInRelease)) { char const * msgstr = nullptr; switch (msg) { case InsecureType::UNSIGNED: msgstr = _("The repository '%s' is no longer signed."); break; case InsecureType::NORELEASE: msgstr = _("The repository '%s' does no longer have a Release file."); break; case InsecureType::WEAK: /* unreachable */ break; } if (_config->FindB("Acquire::AllowDowngradeToInsecureRepositories") || TransactionManager->Target.OptionBool(IndexTarget::ALLOW_DOWNGRADE_TO_INSECURE)) { // meh, the users wants to take risks (we still mark the packages // from this repository as unauthenticated) _error->Warning(msgstr, repo.c_str()); _error->Warning(_("This is normally not allowed, but the option " "Acquire::AllowDowngradeToInsecureRepositories was " "given to override it.")); } else { MessageInsecureRepository(true, msgstr, repo); TransactionManager->AbortTransaction(); I->Status = pkgAcquire::Item::StatError; return false; } } } if(MetaIndexParser->GetTrusted() == metaIndex::TRI_YES) return true; char const * msgstr = nullptr; switch (msg) { case InsecureType::UNSIGNED: msgstr = _("The repository '%s' is not signed."); break; case InsecureType::NORELEASE: msgstr = _("The repository '%s' does not have a Release file."); break; case InsecureType::WEAK: msgstr = _("The repository '%s' provides only weak security information."); break; } if (TargetIsAllowedToBe(TransactionManager->Target, msg) == true) { MessageInsecureRepository(false, msgstr, repo); return true; } MessageInsecureRepository(true, msgstr, repo); TransactionManager->AbortTransaction(); I->Status = pkgAcquire::Item::StatError; return false; } /*}}}*/ static HashStringList GetExpectedHashesFromFor(metaIndex * const Parser, std::string const &MetaKey)/*{{{*/ { if (Parser == NULL) return HashStringList(); metaIndex::checkSum * const R = Parser->Lookup(MetaKey); if (R == NULL) return HashStringList(); return R->Hashes; } /*}}}*/ // all ::HashesRequired and ::GetExpectedHashes implementations /*{{{*/ /* ::GetExpectedHashes is abstract and has to be implemented by all subclasses. It is best to implement it as broadly as possible, while ::HashesRequired defaults to true and should be as restrictive as possible for false cases. Note that if a hash is returned by ::GetExpectedHashes it must match. Only if it doesn't ::HashesRequired is called to evaluate if its okay to have no hashes. */ APT_CONST bool pkgAcqTransactionItem::HashesRequired() const { /* signed repositories obviously have a parser and good hashes. unsigned repositories, too, as even if we can't trust them for security, we can at least trust them for integrity of the download itself. Only repositories without a Release file can (obviously) not have hashes – and they are very uncommon and strongly discouraged */ if (TransactionManager->MetaIndexParser->GetLoadedSuccessfully() != metaIndex::TRI_YES) return false; if (TargetIsAllowedToBe(Target, InsecureType::WEAK)) { /* If we allow weak hashes, we check that we have some (weak) and then declare hashes not needed. That will tip us in the right direction as if hashes exist, they will be used, even if not required */ auto const hsl = GetExpectedHashes(); if (hsl.usable()) return true; if (hsl.empty() == false) return false; } return true; } HashStringList pkgAcqTransactionItem::GetExpectedHashes() const { return GetExpectedHashesFor(GetMetaKey()); } APT_CONST bool pkgAcqMetaBase::HashesRequired() const { // Release and co have no hashes 'by design'. return false; } HashStringList pkgAcqMetaBase::GetExpectedHashes() const { return HashStringList(); } APT_CONST bool pkgAcqIndexDiffs::HashesRequired() const { /* We can't check hashes of rred result as we don't know what the hash of the file will be. We just know the hash of the patch(es), the hash of the file they will apply on and the hash of the resulting file. */ if (State == StateFetchDiff) return true; return false; } HashStringList pkgAcqIndexDiffs::GetExpectedHashes() const { if (State == StateFetchDiff) return available_patches[0].download_hashes; return HashStringList(); } APT_CONST bool pkgAcqIndexMergeDiffs::HashesRequired() const { /* @see #pkgAcqIndexDiffs::HashesRequired, with the difference that we can check the rred result after all patches are applied as we know the expected result rather than potentially apply more patches */ if (State == StateFetchDiff) return true; return State == StateApplyDiff; } HashStringList pkgAcqIndexMergeDiffs::GetExpectedHashes() const { if (State == StateFetchDiff) return patch.download_hashes; else if (State == StateApplyDiff) return GetExpectedHashesFor(Target.MetaKey); return HashStringList(); } APT_CONST bool pkgAcqArchive::HashesRequired() const { return LocalSource == false; } HashStringList pkgAcqArchive::GetExpectedHashes() const { // figured out while parsing the records return ExpectedHashes; } APT_CONST bool pkgAcqFile::HashesRequired() const { // supplied as parameter at creation time, so the caller decides return ExpectedHashes.usable(); } HashStringList pkgAcqFile::GetExpectedHashes() const { return ExpectedHashes; } /*}}}*/ // Acquire::Item::QueueURI and specialisations from child classes /*{{{*/ bool pkgAcquire::Item::QueueURI(pkgAcquire::ItemDesc &Item) { Owner->Enqueue(Item); return true; } /* The idea here is that an item isn't queued if it exists on disk and the transition manager was a hit as this means that the files it contains the checksums for can't be updated either (or they are and we are asking for a hashsum mismatch to happen which helps nobody) */ bool pkgAcqTransactionItem::QueueURI(pkgAcquire::ItemDesc &Item) { if (TransactionManager->State != TransactionStarted) { if (_config->FindB("Debug::Acquire::Transaction", false)) std::clog << "Skip " << Target.URI << " as transaction was already dealt with!" << std::endl; return false; } std::string const FinalFile = GetFinalFilename(); if (TransactionManager->IMSHit == true && FileExists(FinalFile) == true) { PartialFile = DestFile = FinalFile; Status = StatDone; return false; } // If we got the InRelease file via a mirror, pick all indexes directly from this mirror, too if (TransactionManager->BaseURI.empty() == false && URI::SiteOnly(Item.URI) != URI::SiteOnly(TransactionManager->BaseURI)) { // this ensures we rewrite only once and only the first step auto const OldBaseURI = Target.Option(IndexTarget::BASE_URI); if (OldBaseURI.empty() == false && APT::String::Startswith(Item.URI, OldBaseURI)) { auto const ExtraPath = Item.URI.substr(OldBaseURI.length()); Item.URI = flCombine(TransactionManager->BaseURI, ExtraPath); UsedMirror = TransactionManager->UsedMirror; if (Item.Description.find(" ") != string::npos) Item.Description.replace(0, Item.Description.find(" "), UsedMirror); } } return pkgAcquire::Item::QueueURI(Item); } /* The transition manager InRelease itself (or its older sisters-in-law Release & Release.gpg) is always queued as this allows us to rerun gpgv on it to verify that we aren't stalled with old files */ bool pkgAcqMetaBase::QueueURI(pkgAcquire::ItemDesc &Item) { return pkgAcquire::Item::QueueURI(Item); } /* the Diff/Index needs to queue also the up-to-date complete index file to ensure that the list cleaner isn't eating it */ bool pkgAcqDiffIndex::QueueURI(pkgAcquire::ItemDesc &Item) { if (pkgAcqTransactionItem::QueueURI(Item) == true) return true; QueueOnIMSHit(); return false; } /*}}}*/ // Acquire::Item::GetFinalFilename and specialisations for child classes /*{{{*/ std::string pkgAcquire::Item::GetFinalFilename() const { // Beware: Desc.URI is modified by redirections return GetFinalFileNameFromURI(Desc.URI); } std::string pkgAcqDiffIndex::GetFinalFilename() const { return GetFinalFileNameFromURI(GetDiffIndexURI(Target)); } std::string pkgAcqIndex::GetFinalFilename() const { std::string const FinalFile = GetFinalFileNameFromURI(Target.URI); return GetKeepCompressedFileName(FinalFile, Target); } std::string pkgAcqMetaSig::GetFinalFilename() const { return GetFinalFileNameFromURI(Target.URI); } std::string pkgAcqBaseIndex::GetFinalFilename() const { return GetFinalFileNameFromURI(Target.URI); } std::string pkgAcqMetaBase::GetFinalFilename() const { return GetFinalFileNameFromURI(Target.URI); } std::string pkgAcqArchive::GetFinalFilename() const { return _config->FindDir("Dir::Cache::Archives") + flNotDir(StoreFilename); } /*}}}*/ // pkgAcqTransactionItem::GetMetaKey and specialisations for child classes /*{{{*/ std::string pkgAcqTransactionItem::GetMetaKey() const { return Target.MetaKey; } std::string pkgAcqIndex::GetMetaKey() const { if (Stage == STAGE_DECOMPRESS_AND_VERIFY || CurrentCompressionExtension == "uncompressed") return Target.MetaKey; return Target.MetaKey + "." + CurrentCompressionExtension; } std::string pkgAcqDiffIndex::GetMetaKey() const { return GetDiffIndexFileName(Target.MetaKey); } /*}}}*/ //pkgAcqTransactionItem::TransactionState and specialisations for child classes /*{{{*/ bool pkgAcqTransactionItem::TransactionState(TransactionStates const state) { bool const Debug = _config->FindB("Debug::Acquire::Transaction", false); switch(state) { case TransactionStarted: _error->Fatal("Item %s changed to invalid transaction start state!", Target.URI.c_str()); break; case TransactionAbort: if(Debug == true) std::clog << " Cancel: " << DestFile << std::endl; if (Status == pkgAcquire::Item::StatIdle) { Status = pkgAcquire::Item::StatDone; Dequeue(); } break; case TransactionCommit: if(PartialFile.empty() == false) { bool sameFile = (PartialFile == DestFile); // we use symlinks on IMS-Hit to avoid copies if (RealFileExists(DestFile)) { struct stat Buf; if (lstat(PartialFile.c_str(), &Buf) != -1) { if (S_ISLNK(Buf.st_mode) && Buf.st_size > 0) { char partial[Buf.st_size + 1]; ssize_t const sp = readlink(PartialFile.c_str(), partial, Buf.st_size); if (sp == -1) _error->Errno("pkgAcqTransactionItem::TransactionState-sp", _("Failed to readlink %s"), PartialFile.c_str()); else { partial[sp] = '\0'; sameFile = (DestFile == partial); } } } else _error->Errno("pkgAcqTransactionItem::TransactionState-stat", _("Failed to stat %s"), PartialFile.c_str()); } if (sameFile == false) { // ensure that even without lists-cleanup all compressions are nuked std::string FinalFile = GetFinalFileNameFromURI(Target.URI); if (FileExists(FinalFile)) { if(Debug == true) std::clog << "rm " << FinalFile << " # " << DescURI() << std::endl; if (RemoveFile("TransactionStates-Cleanup", FinalFile) == false) return false; } for (auto const &ext: APT::Configuration::getCompressorExtensions()) { auto const Final = FinalFile + ext; if (FileExists(Final)) { if(Debug == true) std::clog << "rm " << Final << " # " << DescURI() << std::endl; if (RemoveFile("TransactionStates-Cleanup", Final) == false) return false; } } if(Debug == true) std::clog << "mv " << PartialFile << " -> "<< DestFile << " # " << DescURI() << std::endl; if (Rename(PartialFile, DestFile) == false) return false; } else if(Debug == true) std::clog << "keep " << PartialFile << " # " << DescURI() << std::endl; } else { if(Debug == true) std::clog << "rm " << DestFile << " # " << DescURI() << std::endl; if (RemoveFile("TransItem::TransactionCommit", DestFile) == false) return false; } break; } return true; } bool pkgAcqMetaBase::TransactionState(TransactionStates const state) { // Do not remove InRelease on IMSHit of Release.gpg [yes, this is very edgecasey] if (TransactionManager->IMSHit == false) return pkgAcqTransactionItem::TransactionState(state); return true; } bool pkgAcqIndex::TransactionState(TransactionStates const state) { if (pkgAcqTransactionItem::TransactionState(state) == false) return false; switch (state) { case TransactionStarted: _error->Fatal("AcqIndex %s changed to invalid transaction start state!", Target.URI.c_str()); break; case TransactionAbort: if (Stage == STAGE_DECOMPRESS_AND_VERIFY) { // keep the compressed file, but drop the decompressed EraseFileName.clear(); if (PartialFile.empty() == false && flExtension(PartialFile) != CurrentCompressionExtension) RemoveFile("TransactionAbort", PartialFile); } break; case TransactionCommit: if (EraseFileName.empty() == false) RemoveFile("AcqIndex::TransactionCommit", EraseFileName); break; } return true; } bool pkgAcqDiffIndex::TransactionState(TransactionStates const state) { if (pkgAcqTransactionItem::TransactionState(state) == false) return false; switch (state) { case TransactionStarted: _error->Fatal("Item %s changed to invalid transaction start state!", Target.URI.c_str()); break; case TransactionCommit: break; case TransactionAbort: std::string const Partial = GetPartialFileNameFromURI(Target.URI); RemoveFile("TransactionAbort", Partial); break; } return true; } /*}}}*/ class APT_HIDDEN NoActionItem : public pkgAcquire::Item /*{{{*/ /* The sole purpose of this class is having an item which does nothing to reach its done state to prevent cleanup deleting the mentioned file. Handy in cases in which we know we have the file already, like IMS-Hits. */ { IndexTarget const Target; public: virtual std::string DescURI() const APT_OVERRIDE {return Target.URI;}; virtual HashStringList GetExpectedHashes() const APT_OVERRIDE {return HashStringList();}; NoActionItem(pkgAcquire * const Owner, IndexTarget const &Target) : pkgAcquire::Item(Owner), Target(Target) { Status = StatDone; DestFile = GetFinalFileNameFromURI(Target.URI); } NoActionItem(pkgAcquire * const Owner, IndexTarget const &Target, std::string const &FinalFile) : pkgAcquire::Item(Owner), Target(Target) { Status = StatDone; DestFile = FinalFile; } }; /*}}}*/ class APT_HIDDEN CleanupItem : public pkgAcqTransactionItem /*{{{*/ /* This class ensures that a file which was configured but isn't downloaded for various reasons isn't kept in an old version in the lists directory. In a way its the reverse of NoActionItem as it helps with removing files even if the lists-cleanup is deactivated. */ { public: virtual std::string DescURI() const APT_OVERRIDE {return Target.URI;}; virtual HashStringList GetExpectedHashes() const APT_OVERRIDE {return HashStringList();}; CleanupItem(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &Target) : pkgAcqTransactionItem(Owner, TransactionManager, Target) { Status = StatDone; DestFile = GetFinalFileNameFromURI(Target.URI); } bool TransactionState(TransactionStates const state) APT_OVERRIDE { switch (state) { case TransactionStarted: break; case TransactionAbort: break; case TransactionCommit: if (_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "rm " << DestFile << " # " << DescURI() << std::endl; if (RemoveFile("TransItem::TransactionCommit", DestFile) == false) return false; break; } return true; } }; /*}}}*/ // Acquire::Item::Item - Constructor /*{{{*/ class pkgAcquire::Item::Private { public: std::vector PastRedirections; }; APT_IGNORE_DEPRECATED_PUSH pkgAcquire::Item::Item(pkgAcquire * const owner) : FileSize(0), PartialSize(0), Mode(0), ID(0), Complete(false), Local(false), QueueCounter(0), ExpectedAdditionalItems(0), Owner(owner), d(new Private()) { Owner->Add(this); Status = StatIdle; } APT_IGNORE_DEPRECATED_POP /*}}}*/ // Acquire::Item::~Item - Destructor /*{{{*/ pkgAcquire::Item::~Item() { Owner->Remove(this); delete d; } /*}}}*/ std::string pkgAcquire::Item::Custom600Headers() const /*{{{*/ { return std::string(); } /*}}}*/ std::string pkgAcquire::Item::ShortDesc() const /*{{{*/ { return DescURI(); } /*}}}*/ APT_CONST void pkgAcquire::Item::Finished() /*{{{*/ { } /*}}}*/ APT_PURE pkgAcquire * pkgAcquire::Item::GetOwner() const /*{{{*/ { return Owner; } /*}}}*/ APT_CONST pkgAcquire::ItemDesc &pkgAcquire::Item::GetItemDesc() /*{{{*/ { return Desc; } /*}}}*/ APT_CONST bool pkgAcquire::Item::IsTrusted() const /*{{{*/ { return false; } /*}}}*/ // Acquire::Item::Failed - Item failed to download /*{{{*/ // --------------------------------------------------------------------- /* We return to an idle state if there are still other queues that could fetch this object */ void pkgAcquire::Item::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf) { if (QueueCounter <= 1) { /* This indicates that the file is not available right now but might be sometime later. If we do a retry cycle then this should be retried [CDROMs] */ if (Cnf != NULL && Cnf->LocalOnly == true && StringToBool(LookupTag(Message,"Transient-Failure"),false) == true) { Status = StatIdle; Dequeue(); return; } switch (Status) { case StatIdle: case StatFetching: case StatDone: Status = StatError; break; case StatAuthError: case StatError: case StatTransientNetworkError: break; } Complete = false; Dequeue(); } string const FailReason = LookupTag(Message, "FailReason"); enum { MAXIMUM_SIZE_EXCEEDED, HASHSUM_MISMATCH, WEAK_HASHSUMS, REDIRECTION_LOOP, OTHER } failreason = OTHER; if ( FailReason == "MaximumSizeExceeded") failreason = MAXIMUM_SIZE_EXCEEDED; else if ( FailReason == "WeakHashSums") failreason = WEAK_HASHSUMS; else if (FailReason == "RedirectionLoop") failreason = REDIRECTION_LOOP; else if (Status == StatAuthError) failreason = HASHSUM_MISMATCH; if(ErrorText.empty()) { std::ostringstream out; switch (failreason) { case HASHSUM_MISMATCH: out << _("Hash Sum mismatch") << std::endl; break; case WEAK_HASHSUMS: out << _("Insufficient information available to perform this download securely") << std::endl; break; case REDIRECTION_LOOP: out << "Redirection loop encountered" << std::endl; break; case MAXIMUM_SIZE_EXCEEDED: out << LookupTag(Message, "Message") << std::endl; break; case OTHER: out << LookupTag(Message, "Message"); break; } if (Status == StatAuthError) { auto const ExpectedHashes = GetExpectedHashes(); if (ExpectedHashes.empty() == false) { out << "Hashes of expected file:" << std::endl; for (auto const &hs: ExpectedHashes) { out << " - " << hs.toStr(); if (hs.usable() == false) out << " [weak]"; out << std::endl; } } if (failreason == HASHSUM_MISMATCH) { out << "Hashes of received file:" << std::endl; for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type) { std::string const tagname = std::string(*type) + "-Hash"; std::string const hashsum = LookupTag(Message, tagname.c_str()); if (hashsum.empty() == false) { auto const hs = HashString(*type, hashsum); out << " - " << hs.toStr(); if (hs.usable() == false) out << " [weak]"; out << std::endl; } } out << "Last modification reported: " << LookupTag(Message, "Last-Modified", "") << std::endl; } } ErrorText = out.str(); } switch (failreason) { case MAXIMUM_SIZE_EXCEEDED: RenameOnError(MaximumSizeExceeded); break; case HASHSUM_MISMATCH: RenameOnError(HashSumMismatch); break; case WEAK_HASHSUMS: break; case REDIRECTION_LOOP: break; case OTHER: break; } if (FailReason.empty() == false) ReportMirrorFailureToCentral(*this, FailReason, ErrorText); else ReportMirrorFailureToCentral(*this, ErrorText, ErrorText); if (QueueCounter > 1) Status = StatIdle; } /*}}}*/ // Acquire::Item::Start - Item has begun to download /*{{{*/ // --------------------------------------------------------------------- /* Stash status and the file size. Note that setting Complete means sub-phases of the acquire process such as decompresion are operating */ void pkgAcquire::Item::Start(string const &/*Message*/, unsigned long long const Size) { Status = StatFetching; ErrorText.clear(); if (FileSize == 0 && Complete == false) FileSize = Size; } /*}}}*/ // Acquire::Item::VerifyDone - check if Item was downloaded OK /*{{{*/ /* Note that hash-verification is 'hardcoded' in acquire-worker and has * already passed if this method is called. */ bool pkgAcquire::Item::VerifyDone(std::string const &Message, pkgAcquire::MethodConfig const * const /*Cnf*/) { std::string const FileName = LookupTag(Message,"Filename"); if (FileName.empty() == true) { Status = StatError; ErrorText = "Method gave a blank filename"; return false; } return true; } /*}}}*/ // Acquire::Item::Done - Item downloaded OK /*{{{*/ void pkgAcquire::Item::Done(string const &/*Message*/, HashStringList const &Hashes, pkgAcquire::MethodConfig const * const /*Cnf*/) { // We just downloaded something.. if (FileSize == 0) { unsigned long long const downloadedSize = Hashes.FileSize(); if (downloadedSize != 0) { FileSize = downloadedSize; } } Status = StatDone; ErrorText = string(); Owner->Dequeue(this); } /*}}}*/ // Acquire::Item::Rename - Rename a file /*{{{*/ // --------------------------------------------------------------------- /* This helper function is used by a lot of item methods as their final step */ bool pkgAcquire::Item::Rename(string const &From,string const &To) { if (From == To || rename(From.c_str(),To.c_str()) == 0) return true; std::string S; strprintf(S, _("rename failed, %s (%s -> %s)."), strerror(errno), From.c_str(),To.c_str()); Status = StatError; if (ErrorText.empty()) ErrorText = S; else ErrorText = ErrorText + ": " + S; return false; } /*}}}*/ void pkgAcquire::Item::Dequeue() /*{{{*/ { Owner->Dequeue(this); } /*}}}*/ bool pkgAcquire::Item::RenameOnError(pkgAcquire::Item::RenameOnErrorState const error)/*{{{*/ { if (RealFileExists(DestFile)) Rename(DestFile, DestFile + ".FAILED"); std::string errtext; switch (error) { case HashSumMismatch: errtext = _("Hash Sum mismatch"); break; case SizeMismatch: errtext = _("Size mismatch"); Status = StatAuthError; break; case InvalidFormat: errtext = _("Invalid file format"); Status = StatError; // do not report as usually its not the mirrors fault, but Portal/Proxy break; case SignatureError: errtext = _("Signature error"); Status = StatError; break; case NotClearsigned: strprintf(errtext, _("Clearsigned file isn't valid, got '%s' (does the network require authentication?)"), "NOSPLIT"); Status = StatAuthError; break; case MaximumSizeExceeded: // the method is expected to report a good error for this break; case PDiffError: // no handling here, done by callers break; } if (ErrorText.empty()) ErrorText = errtext; return false; } /*}}}*/ void pkgAcquire::Item::SetActiveSubprocess(const std::string &subprocess)/*{{{*/ { ActiveSubprocess = subprocess; APT_IGNORE_DEPRECATED(Mode = ActiveSubprocess.c_str();) } /*}}}*/ // Acquire::Item::ReportMirrorFailure /*{{{*/ void pkgAcquire::Item::ReportMirrorFailure(std::string const &FailCode) { ReportMirrorFailureToCentral(*this, FailCode, FailCode); } /*}}}*/ std::string pkgAcquire::Item::HashSum() const /*{{{*/ { HashStringList const hashes = GetExpectedHashes(); HashString const * const hs = hashes.find(NULL); return hs != NULL ? hs->toStr() : ""; } /*}}}*/ bool pkgAcquire::Item::IsRedirectionLoop(std::string const &NewURI) /*{{{*/ { // store can fail due to permission errors and the item will "loop" then if (APT::String::Startswith(NewURI, "store:")) return false; if (d->PastRedirections.empty()) { d->PastRedirections.push_back(NewURI); return false; } auto const LastURI = std::prev(d->PastRedirections.end()); // redirections to the same file are a way of restarting/resheduling, // individual methods will have to make sure that they aren't looping this way if (*LastURI == NewURI) return false; if (std::find(d->PastRedirections.begin(), LastURI, NewURI) != LastURI) return true; d->PastRedirections.push_back(NewURI); return false; } /*}}}*/ pkgAcqTransactionItem::pkgAcqTransactionItem(pkgAcquire * const Owner, /*{{{*/ pkgAcqMetaClearSig * const transactionManager, IndexTarget const &target) : pkgAcquire::Item(Owner), d(NULL), Target(target), TransactionManager(transactionManager) { if (TransactionManager != this) TransactionManager->Add(this); } /*}}}*/ pkgAcqTransactionItem::~pkgAcqTransactionItem() /*{{{*/ { } /*}}}*/ HashStringList pkgAcqTransactionItem::GetExpectedHashesFor(std::string const &MetaKey) const /*{{{*/ { return GetExpectedHashesFromFor(TransactionManager->MetaIndexParser, MetaKey); } /*}}}*/ static void LoadLastMetaIndexParser(pkgAcqMetaClearSig * const TransactionManager, std::string const &FinalRelease, std::string const &FinalInRelease)/*{{{*/ { if (TransactionManager->IMSHit == true) return; if (RealFileExists(FinalInRelease) || RealFileExists(FinalRelease)) { TransactionManager->LastMetaIndexParser = TransactionManager->MetaIndexParser->UnloadedClone(); if (TransactionManager->LastMetaIndexParser != NULL) { _error->PushToStack(); if (RealFileExists(FinalInRelease)) TransactionManager->LastMetaIndexParser->Load(FinalInRelease, NULL); else TransactionManager->LastMetaIndexParser->Load(FinalRelease, NULL); // its unlikely to happen, but if what we have is bad ignore it if (_error->PendingError()) { delete TransactionManager->LastMetaIndexParser; TransactionManager->LastMetaIndexParser = NULL; } _error->RevertToStack(); } } } /*}}}*/ // AcqMetaBase - Constructor /*{{{*/ pkgAcqMetaBase::pkgAcqMetaBase(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &DataTarget) : pkgAcqTransactionItem(Owner, TransactionManager, DataTarget), d(NULL), AuthPass(false), IMSHit(false), State(TransactionStarted) { } /*}}}*/ // AcqMetaBase::Add - Add a item to the current Transaction /*{{{*/ void pkgAcqMetaBase::Add(pkgAcqTransactionItem * const I) { Transaction.push_back(I); } /*}}}*/ // AcqMetaBase::AbortTransaction - Abort the current Transaction /*{{{*/ void pkgAcqMetaBase::AbortTransaction() { if(_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "AbortTransaction: " << TransactionManager << std::endl; switch (TransactionManager->State) { case TransactionStarted: break; case TransactionAbort: _error->Fatal("Transaction %s was already aborted and is aborted again", TransactionManager->Target.URI.c_str()); return; case TransactionCommit: _error->Fatal("Transaction %s was already aborted and is now committed", TransactionManager->Target.URI.c_str()); return; } TransactionManager->State = TransactionAbort; // ensure the toplevel is in error state too for (std::vector::iterator I = Transaction.begin(); I != Transaction.end(); ++I) { if ((*I)->Status != pkgAcquire::Item::StatFetching) Owner->Dequeue(*I); (*I)->TransactionState(TransactionAbort); } Transaction.clear(); } /*}}}*/ // AcqMetaBase::TransactionHasError - Check for errors in Transaction /*{{{*/ APT_PURE bool pkgAcqMetaBase::TransactionHasError() const { for (std::vector::const_iterator I = Transaction.begin(); I != Transaction.end(); ++I) { switch((*I)->Status) { case StatDone: break; case StatIdle: break; case StatAuthError: return true; case StatError: return true; case StatTransientNetworkError: return true; case StatFetching: break; } } return false; } /*}}}*/ // AcqMetaBase::CommitTransaction - Commit a transaction /*{{{*/ void pkgAcqMetaBase::CommitTransaction() { if(_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "CommitTransaction: " << this << std::endl; switch (TransactionManager->State) { case TransactionStarted: break; case TransactionAbort: _error->Fatal("Transaction %s was already committed and is now aborted", TransactionManager->Target.URI.c_str()); return; case TransactionCommit: _error->Fatal("Transaction %s was already committed and is again committed", TransactionManager->Target.URI.c_str()); return; } TransactionManager->State = TransactionCommit; // move new files into place *and* remove files that are not // part of the transaction but are still on disk for (std::vector::iterator I = Transaction.begin(); I != Transaction.end(); ++I) { (*I)->TransactionState(TransactionCommit); } Transaction.clear(); } /*}}}*/ // AcqMetaBase::TransactionStageCopy - Stage a file for copying /*{{{*/ void pkgAcqMetaBase::TransactionStageCopy(pkgAcqTransactionItem * const I, const std::string &From, const std::string &To) { I->PartialFile = From; I->DestFile = To; } /*}}}*/ // AcqMetaBase::TransactionStageRemoval - Stage a file for removal /*{{{*/ void pkgAcqMetaBase::TransactionStageRemoval(pkgAcqTransactionItem * const I, const std::string &FinalFile) { I->PartialFile = ""; I->DestFile = FinalFile; } /*}}}*/ // AcqMetaBase::GenerateAuthWarning - Check gpg authentication error /*{{{*/ /* This method is called from ::Failed handlers. If it returns true, no fallback to other files or modi is performed */ bool pkgAcqMetaBase::CheckStopAuthentication(pkgAcquire::Item * const I, const std::string &Message) { string const Final = I->GetFinalFilename(); std::string const GPGError = LookupTag(Message, "Message"); if (FileExists(Final)) { I->Status = StatTransientNetworkError; _error->Warning(_("An error occurred during the signature verification. " "The repository is not updated and the previous index files will be used. " "GPG error: %s: %s"), Desc.Description.c_str(), GPGError.c_str()); RunScripts("APT::Update::Auth-Failure"); return true; } else if (LookupTag(Message,"Message").find("NODATA") != string::npos) { /* Invalid signature file, reject (LP: #346386) (Closes: #627642) */ _error->Error(_("GPG error: %s: %s"), Desc.Description.c_str(), GPGError.c_str()); I->Status = StatAuthError; return true; } else { _error->Warning(_("GPG error: %s: %s"), Desc.Description.c_str(), GPGError.c_str()); } // gpgv method failed ReportMirrorFailureToCentral(*this, "GPGFailure", GPGError); return false; } /*}}}*/ // AcqMetaBase::Custom600Headers - Get header for AcqMetaBase /*{{{*/ // --------------------------------------------------------------------- string pkgAcqMetaBase::Custom600Headers() const { std::string Header = "\nIndex-File: true"; std::string MaximumSize; strprintf(MaximumSize, "\nMaximum-Size: %i", _config->FindI("Acquire::MaxReleaseFileSize", 10*1000*1000)); Header += MaximumSize; string const FinalFile = GetFinalFilename(); struct stat Buf; if (stat(FinalFile.c_str(),&Buf) == 0) Header += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime, false); return Header; } /*}}}*/ // AcqMetaBase::QueueForSignatureVerify /*{{{*/ void pkgAcqMetaBase::QueueForSignatureVerify(pkgAcqTransactionItem * const I, std::string const &File, std::string const &Signature) { AuthPass = true; I->Desc.URI = "gpgv:" + Signature; I->DestFile = File; QueueURI(I->Desc); I->SetActiveSubprocess("gpgv"); } /*}}}*/ // AcqMetaBase::CheckDownloadDone /*{{{*/ bool pkgAcqMetaBase::CheckDownloadDone(pkgAcqTransactionItem * const I, const std::string &Message, HashStringList const &Hashes) const { // We have just finished downloading a Release file (it is not // verified yet) // Save the final base URI we got this Release file from if (I->UsedMirror.empty() == false && _config->FindB("Acquire::SameMirrorForAllIndexes", true)) { if (APT::String::Endswith(I->Desc.URI, "InRelease")) TransactionManager->BaseURI = I->Desc.URI.substr(0, I->Desc.URI.length() - strlen("InRelease")); else if (APT::String::Endswith(I->Desc.URI, "Release")) TransactionManager->BaseURI = I->Desc.URI.substr(0, I->Desc.URI.length() - strlen("Release")); } std::string const FileName = LookupTag(Message,"Filename"); if (FileName != I->DestFile && RealFileExists(I->DestFile) == false) { I->Local = true; I->Desc.URI = "copy:" + FileName; I->QueueURI(I->Desc); return false; } // make sure to verify against the right file on I-M-S hit bool IMSHit = StringToBool(LookupTag(Message,"IMS-Hit"), false); if (IMSHit == false && Hashes.usable()) { // detect IMS-Hits servers haven't detected by Hash comparison std::string const FinalFile = I->GetFinalFilename(); if (RealFileExists(FinalFile) && Hashes.VerifyFile(FinalFile) == true) { IMSHit = true; RemoveFile("CheckDownloadDone", I->DestFile); } } if(IMSHit == true) { // for simplicity, the transaction manager is always InRelease // even if it doesn't exist. TransactionManager->IMSHit = true; I->PartialFile = I->DestFile = I->GetFinalFilename(); } // set Item to complete as the remaining work is all local (verify etc) I->Complete = true; return true; } /*}}}*/ bool pkgAcqMetaBase::CheckAuthDone(string const &Message) /*{{{*/ { // At this point, the gpgv method has succeeded, so there is a // valid signature from a key in the trusted keyring. We // perform additional verification of its contents, and use them // to verify the indexes we are about to download if (_config->FindB("Debug::pkgAcquire::Auth", false)) std::cerr << "Signature verification succeeded: " << DestFile << std::endl; if (TransactionManager->IMSHit == false) { // open the last (In)Release if we have it std::string const FinalFile = GetFinalFilename(); std::string FinalRelease; std::string FinalInRelease; if (APT::String::Endswith(FinalFile, "InRelease")) { FinalInRelease = FinalFile; FinalRelease = FinalFile.substr(0, FinalFile.length() - strlen("InRelease")) + "Release"; } else { FinalInRelease = FinalFile.substr(0, FinalFile.length() - strlen("Release")) + "InRelease"; FinalRelease = FinalFile; } LoadLastMetaIndexParser(TransactionManager, FinalRelease, FinalInRelease); } bool const GoodAuth = TransactionManager->MetaIndexParser->Load(DestFile, &ErrorText); if (GoodAuth == false && AllowInsecureRepositories(InsecureType::WEAK, Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == false) { Status = StatAuthError; return false; } if (!VerifyVendor(Message)) { Status = StatAuthError; return false; } // Download further indexes with verification TransactionManager->QueueIndexes(GoodAuth); return GoodAuth; } /*}}}*/ void pkgAcqMetaClearSig::QueueIndexes(bool const verify) /*{{{*/ { // at this point the real Items are loaded in the fetcher ExpectedAdditionalItems = 0; std::set targetsSeen; bool const hasReleaseFile = TransactionManager->MetaIndexParser != NULL; bool const metaBaseSupportsByHash = hasReleaseFile && TransactionManager->MetaIndexParser->GetSupportsAcquireByHash(); bool hasHashes = true; auto IndexTargets = TransactionManager->MetaIndexParser->GetIndexTargets(); if (hasReleaseFile && verify == false) hasHashes = std::any_of(IndexTargets.begin(), IndexTargets.end(), [&](IndexTarget const &Target) { return TransactionManager->MetaIndexParser->Exists(Target.MetaKey); }); for (auto&& Target: IndexTargets) { // if we have seen a target which is created-by a target this one here is declared a // fallback to, we skip acquiring the fallback (but we make sure we clean up) if (targetsSeen.find(Target.Option(IndexTarget::FALLBACK_OF)) != targetsSeen.end()) { targetsSeen.emplace(Target.Option(IndexTarget::CREATED_BY)); new CleanupItem(Owner, TransactionManager, Target); continue; } // all is an implementation detail. Users shouldn't use this as arch // We need this support trickery here as e.g. Debian has binary-all files already, // but arch:all packages are still in the arch:any files, so we would waste precious // download time, bandwidth and diskspace for nothing, BUT Debian doesn't feature all // in the set of supported architectures, so we can filter based on this property rather // than invent an entirely new flag we would need to carry for all of eternity. if (hasReleaseFile && Target.Option(IndexTarget::ARCHITECTURE) == "all") { if (TransactionManager->MetaIndexParser->IsArchitectureAllSupportedFor(Target) == false) { new CleanupItem(Owner, TransactionManager, Target); continue; } } bool trypdiff = Target.OptionBool(IndexTarget::PDIFFS); if (hasReleaseFile == true) { if (TransactionManager->MetaIndexParser->Exists(Target.MetaKey) == false) { // optional targets that we do not have in the Release file are skipped if (hasHashes == true && Target.IsOptional) { new CleanupItem(Owner, TransactionManager, Target); continue; } std::string const &arch = Target.Option(IndexTarget::ARCHITECTURE); if (arch.empty() == false) { if (TransactionManager->MetaIndexParser->IsArchitectureSupported(arch) == false) { new CleanupItem(Owner, TransactionManager, Target); _error->Notice(_("Skipping acquire of configured file '%s' as repository '%s' doesn't support architecture '%s'"), Target.MetaKey.c_str(), TransactionManager->Target.Description.c_str(), arch.c_str()); continue; } // if the architecture is officially supported but currently no packages for it available, // ignore silently as this is pretty much the same as just shipping an empty file. // if we don't know which architectures are supported, we do NOT ignore it to notify user about this if (hasHashes == true && TransactionManager->MetaIndexParser->IsArchitectureSupported("*undefined*") == false) { new CleanupItem(Owner, TransactionManager, Target); continue; } } if (hasHashes == true) { Status = StatAuthError; strprintf(ErrorText, _("Unable to find expected entry '%s' in Release file (Wrong sources.list entry or malformed file)"), Target.MetaKey.c_str()); return; } else { new pkgAcqIndex(Owner, TransactionManager, Target); continue; } } else if (verify) { auto const hashes = GetExpectedHashesFor(Target.MetaKey); if (hashes.empty() == false) { if (hashes.usable() == false && TargetIsAllowedToBe(TransactionManager->Target, InsecureType::WEAK) == false) { new CleanupItem(Owner, TransactionManager, Target); _error->Warning(_("Skipping acquire of configured file '%s' as repository '%s' provides only weak security information for it"), Target.MetaKey.c_str(), TransactionManager->Target.Description.c_str()); continue; } // empty files are skipped as acquiring the very small compressed files is a waste of time else if (hashes.FileSize() == 0) { new CleanupItem(Owner, TransactionManager, Target); targetsSeen.emplace(Target.Option(IndexTarget::CREATED_BY)); continue; } } } // autoselect the compression method std::vector types = VectorizeString(Target.Option(IndexTarget::COMPRESSIONTYPES), ' '); types.erase(std::remove_if(types.begin(), types.end(), [&](std::string const &t) { if (t == "uncompressed") return TransactionManager->MetaIndexParser->Exists(Target.MetaKey) == false; std::string const MetaKey = Target.MetaKey + "." + t; return TransactionManager->MetaIndexParser->Exists(MetaKey) == false; }), types.end()); if (types.empty() == false) { std::ostringstream os; // add the special compressiontype byhash first if supported std::string const useByHashConf = Target.Option(IndexTarget::BY_HASH); bool useByHash = false; if(useByHashConf == "force") useByHash = true; else useByHash = StringToBool(useByHashConf) == true && metaBaseSupportsByHash; if (useByHash == true) os << "by-hash "; std::copy(types.begin(), types.end()-1, std::ostream_iterator(os, " ")); os << *types.rbegin(); Target.Options["COMPRESSIONTYPES"] = os.str(); } else Target.Options["COMPRESSIONTYPES"].clear(); std::string filename = GetExistingFilename(GetFinalFileNameFromURI(Target.URI)); if (filename.empty() == false) { // if the Release file is a hit and we have an index it must be the current one if (TransactionManager->IMSHit == true) ; else if (TransactionManager->LastMetaIndexParser != NULL) { // see if the file changed since the last Release file // we use the uncompressed files as we might compress differently compared to the server, // so the hashes might not match, even if they contain the same data. HashStringList const newFile = GetExpectedHashesFromFor(TransactionManager->MetaIndexParser, Target.MetaKey); HashStringList const oldFile = GetExpectedHashesFromFor(TransactionManager->LastMetaIndexParser, Target.MetaKey); if (newFile != oldFile) filename.clear(); } else filename.clear(); } else trypdiff = false; // no file to patch if (filename.empty() == false) { new NoActionItem(Owner, Target, filename); std::string const idxfilename = GetFinalFileNameFromURI(GetDiffIndexURI(Target)); if (FileExists(idxfilename)) new NoActionItem(Owner, Target, idxfilename); targetsSeen.emplace(Target.Option(IndexTarget::CREATED_BY)); continue; } // check if we have patches available trypdiff &= TransactionManager->MetaIndexParser->Exists(GetDiffIndexFileName(Target.MetaKey)); } else { // if we have no file to patch, no point in trying trypdiff &= (GetExistingFilename(GetFinalFileNameFromURI(Target.URI)).empty() == false); } // no point in patching from local sources if (trypdiff) { std::string const proto = Target.URI.substr(0, strlen("file:/")); if (proto == "file:/" || proto == "copy:/" || proto == "cdrom:") trypdiff = false; } // Queue the Index file (Packages, Sources, Translation-$foo, …) targetsSeen.emplace(Target.Option(IndexTarget::CREATED_BY)); if (trypdiff) new pkgAcqDiffIndex(Owner, TransactionManager, Target); else new pkgAcqIndex(Owner, TransactionManager, Target); } } /*}}}*/ bool pkgAcqMetaBase::VerifyVendor(string const &) /*{{{*/ { string Transformed = TransactionManager->MetaIndexParser->GetExpectedDist(); if (Transformed == "../project/experimental") { Transformed = "experimental"; } auto pos = Transformed.rfind('/'); if (pos != string::npos) { Transformed = Transformed.substr(0, pos); } if (Transformed == ".") { Transformed = ""; } if (TransactionManager->MetaIndexParser->GetValidUntil() > 0) { time_t const invalid_since = time(NULL) - TransactionManager->MetaIndexParser->GetValidUntil(); if (invalid_since > 0) { std::string errmsg; strprintf(errmsg, // TRANSLATOR: The first %s is the URL of the bad Release file, the second is // the time since then the file is invalid - formatted in the same way as in // the download progress display (e.g. 7d 3h 42min 1s) _("Release file for %s is expired (invalid since %s). " "Updates for this repository will not be applied."), Target.URI.c_str(), TimeToStr(invalid_since).c_str()); if (ErrorText.empty()) ErrorText = errmsg; return _error->Error("%s", errmsg.c_str()); } } /* Did we get a file older than what we have? This is a last minute IMS hit and doubles as a prevention of downgrading us to older (still valid) files */ if (TransactionManager->IMSHit == false && TransactionManager->LastMetaIndexParser != NULL && TransactionManager->LastMetaIndexParser->GetDate() > TransactionManager->MetaIndexParser->GetDate()) { TransactionManager->IMSHit = true; RemoveFile("VerifyVendor", DestFile); PartialFile = DestFile = GetFinalFilename(); // load the 'old' file in the 'new' one instead of flipping pointers as // the new one isn't owned by us, while the old one is so cleanup would be confused. TransactionManager->MetaIndexParser->swapLoad(TransactionManager->LastMetaIndexParser); delete TransactionManager->LastMetaIndexParser; TransactionManager->LastMetaIndexParser = NULL; } if (_config->FindB("Debug::pkgAcquire::Auth", false)) { std::cerr << "Got Codename: " << TransactionManager->MetaIndexParser->GetCodename() << std::endl; std::cerr << "Expecting Dist: " << TransactionManager->MetaIndexParser->GetExpectedDist() << std::endl; std::cerr << "Transformed Dist: " << Transformed << std::endl; } if (TransactionManager->MetaIndexParser->CheckDist(Transformed) == false) { // This might become fatal one day // Status = StatAuthError; // ErrorText = "Conflicting distribution; expected " // + MetaIndexParser->GetExpectedDist() + " but got " // + MetaIndexParser->GetCodename(); // return false; if (!Transformed.empty()) { _error->Warning(_("Conflicting distribution: %s (expected %s but got %s)"), Desc.Description.c_str(), Transformed.c_str(), TransactionManager->MetaIndexParser->GetCodename().c_str()); } } return true; } /*}}}*/ pkgAcqMetaBase::~pkgAcqMetaBase() { } pkgAcqMetaClearSig::pkgAcqMetaClearSig(pkgAcquire * const Owner, /*{{{*/ IndexTarget const &ClearsignedTarget, IndexTarget const &DetachedDataTarget, IndexTarget const &DetachedSigTarget, metaIndex * const MetaIndexParser) : pkgAcqMetaIndex(Owner, this, ClearsignedTarget, DetachedSigTarget), d(NULL), DetachedDataTarget(DetachedDataTarget), MetaIndexParser(MetaIndexParser), LastMetaIndexParser(NULL) { // index targets + (worst case:) Release/Release.gpg ExpectedAdditionalItems = std::numeric_limits::max(); TransactionManager->Add(this); } /*}}}*/ pkgAcqMetaClearSig::~pkgAcqMetaClearSig() /*{{{*/ { if (LastMetaIndexParser != NULL) delete LastMetaIndexParser; } /*}}}*/ // pkgAcqMetaClearSig::Custom600Headers - Insert custom request headers /*{{{*/ string pkgAcqMetaClearSig::Custom600Headers() const { string Header = pkgAcqMetaBase::Custom600Headers(); Header += "\nFail-Ignore: true"; std::string const key = TransactionManager->MetaIndexParser->GetSignedBy(); if (key.empty() == false) Header += "\nSigned-By: " + key; return Header; } /*}}}*/ void pkgAcqMetaClearSig::Finished() /*{{{*/ { if(_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "Finished: " << DestFile <State == TransactionStarted && TransactionManager->TransactionHasError() == false) TransactionManager->CommitTransaction(); } /*}}}*/ bool pkgAcqMetaClearSig::VerifyDone(std::string const &Message, /*{{{*/ pkgAcquire::MethodConfig const * const Cnf) { Item::VerifyDone(Message, Cnf); if (FileExists(DestFile) && !StartsWithGPGClearTextSignature(DestFile)) return RenameOnError(NotClearsigned); return true; } /*}}}*/ // pkgAcqMetaClearSig::Done - We got a file /*{{{*/ void pkgAcqMetaClearSig::Done(std::string const &Message, HashStringList const &Hashes, pkgAcquire::MethodConfig const * const Cnf) { Item::Done(Message, Hashes, Cnf); if(AuthPass == false) { if(CheckDownloadDone(this, Message, Hashes) == true) QueueForSignatureVerify(this, DestFile, DestFile); return; } else if(CheckAuthDone(Message) == true) { if (TransactionManager->IMSHit == false) TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename()); else if (RealFileExists(GetFinalFilename()) == false) { // We got an InRelease file IMSHit, but we haven't one, which means // we had a valid Release/Release.gpg combo stepping in, which we have // to 'acquire' now to ensure list cleanup isn't removing them new NoActionItem(Owner, DetachedDataTarget); new NoActionItem(Owner, DetachedSigTarget); } } else if (Status != StatAuthError) { string const FinalFile = GetFinalFileNameFromURI(DetachedDataTarget.URI); string const OldFile = GetFinalFilename(); if (TransactionManager->IMSHit == false) TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); else if (RealFileExists(OldFile) == false) new NoActionItem(Owner, DetachedDataTarget); else TransactionManager->TransactionStageCopy(this, OldFile, FinalFile); } } /*}}}*/ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf) /*{{{*/ { Item::Failed(Message, Cnf); if (AuthPass == false) { if (Status == StatAuthError || Status == StatTransientNetworkError) { // if we expected a ClearTextSignature (InRelease) but got a network // error or got a file, but it wasn't valid, we end up here (see VerifyDone). // As these is usually called by web-portals we do not try Release/Release.gpg // as this is gonna fail anyway and instead abort our try (LP#346386) TransactionManager->AbortTransaction(); return; } // Queue the 'old' InRelease file for removal if we try Release.gpg // as otherwise the file will stay around and gives a false-auth // impression (CVE-2012-0214) TransactionManager->TransactionStageRemoval(this, GetFinalFilename()); Status = StatDone; new pkgAcqMetaIndex(Owner, TransactionManager, DetachedDataTarget, DetachedSigTarget); } else { if(CheckStopAuthentication(this, Message)) return; if(AllowInsecureRepositories(InsecureType::UNSIGNED, Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true) { Status = StatDone; /* InRelease files become Release files, otherwise * they would be considered as trusted later on */ string const FinalRelease = GetFinalFileNameFromURI(DetachedDataTarget.URI); string const PartialRelease = GetPartialFileNameFromURI(DetachedDataTarget.URI); string const FinalReleasegpg = GetFinalFileNameFromURI(DetachedSigTarget.URI); string const FinalInRelease = GetFinalFilename(); Rename(DestFile, PartialRelease); TransactionManager->TransactionStageCopy(this, PartialRelease, FinalRelease); LoadLastMetaIndexParser(TransactionManager, FinalRelease, FinalInRelease); // we parse the indexes here because at this point the user wanted // a repository that may potentially harm him if (TransactionManager->MetaIndexParser->Load(PartialRelease, &ErrorText) == false || VerifyVendor(Message) == false) /* expired Release files are still a problem you need extra force for */; else TransactionManager->QueueIndexes(true); } } } /*}}}*/ pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire * const Owner, /*{{{*/ pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &DataTarget, IndexTarget const &DetachedSigTarget) : pkgAcqMetaBase(Owner, TransactionManager, DataTarget), d(NULL), DetachedSigTarget(DetachedSigTarget) { if(_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "New pkgAcqMetaIndex with TransactionManager " << this->TransactionManager << std::endl; DestFile = GetPartialFileNameFromURI(DataTarget.URI); // Create the item Desc.Description = DataTarget.Description; Desc.Owner = this; Desc.ShortDesc = DataTarget.ShortDesc; Desc.URI = DataTarget.URI; QueueURI(Desc); } /*}}}*/ void pkgAcqMetaIndex::Done(string const &Message, /*{{{*/ HashStringList const &Hashes, pkgAcquire::MethodConfig const * const Cfg) { Item::Done(Message,Hashes,Cfg); if(CheckDownloadDone(this, Message, Hashes)) { // we have a Release file, now download the Signature, all further // verify/queue for additional downloads will be done in the // pkgAcqMetaSig::Done() code new pkgAcqMetaSig(Owner, TransactionManager, DetachedSigTarget, this); } } /*}}}*/ // pkgAcqMetaIndex::Failed - no Release file present /*{{{*/ void pkgAcqMetaIndex::Failed(string const &Message, pkgAcquire::MethodConfig const * const Cnf) { pkgAcquire::Item::Failed(Message, Cnf); Status = StatDone; // No Release file was present so fall // back to queueing Packages files without verification // only allow going further if the user explicitly wants it if(AllowInsecureRepositories(InsecureType::NORELEASE, Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true) { // ensure old Release files are removed TransactionManager->TransactionStageRemoval(this, GetFinalFilename()); // queue without any kind of hashsum support TransactionManager->QueueIndexes(false); } } /*}}}*/ std::string pkgAcqMetaIndex::DescURI() const /*{{{*/ { return Target.URI; } /*}}}*/ pkgAcqMetaIndex::~pkgAcqMetaIndex() {} // AcqMetaSig::AcqMetaSig - Constructor /*{{{*/ pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &Target, pkgAcqMetaIndex * const MetaIndex) : pkgAcqTransactionItem(Owner, TransactionManager, Target), d(NULL), MetaIndex(MetaIndex) { DestFile = GetPartialFileNameFromURI(Target.URI); // remove any partial downloaded sig-file in partial/. // it may confuse proxies and is too small to warrant a // partial download anyway RemoveFile("pkgAcqMetaSig", DestFile); // set the TransactionManager if(_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "New pkgAcqMetaSig with TransactionManager " << TransactionManager << std::endl; // Create the item Desc.Description = Target.Description; Desc.Owner = this; Desc.ShortDesc = Target.ShortDesc; Desc.URI = Target.URI; // If we got a hit for Release, we will get one for Release.gpg too (or obscure errors), // so we skip the download step and go instantly to verification if (TransactionManager->IMSHit == true && RealFileExists(GetFinalFilename())) { Complete = true; Status = StatDone; PartialFile = DestFile = GetFinalFilename(); MetaIndexFileSignature = DestFile; MetaIndex->QueueForSignatureVerify(this, MetaIndex->DestFile, DestFile); } else QueueURI(Desc); } /*}}}*/ pkgAcqMetaSig::~pkgAcqMetaSig() /*{{{*/ { } /*}}}*/ // pkgAcqMetaSig::Custom600Headers - Insert custom request headers /*{{{*/ std::string pkgAcqMetaSig::Custom600Headers() const { std::string Header = pkgAcqTransactionItem::Custom600Headers(); std::string const key = TransactionManager->MetaIndexParser->GetSignedBy(); if (key.empty() == false) Header += "\nSigned-By: " + key; return Header; } /*}}}*/ // AcqMetaSig::Done - The signature was downloaded/verified /*{{{*/ void pkgAcqMetaSig::Done(string const &Message, HashStringList const &Hashes, pkgAcquire::MethodConfig const * const Cfg) { if (MetaIndexFileSignature.empty() == false) { DestFile = MetaIndexFileSignature; MetaIndexFileSignature.clear(); } Item::Done(Message, Hashes, Cfg); if(MetaIndex->AuthPass == false) { if(MetaIndex->CheckDownloadDone(this, Message, Hashes) == true) { // destfile will be modified to point to MetaIndexFile for the // gpgv method, so we need to save it here MetaIndexFileSignature = DestFile; MetaIndex->QueueForSignatureVerify(this, MetaIndex->DestFile, DestFile); } return; } else if(MetaIndex->CheckAuthDone(Message) == true) { if (TransactionManager->IMSHit == false) { TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename()); TransactionManager->TransactionStageCopy(MetaIndex, MetaIndex->DestFile, MetaIndex->GetFinalFilename()); } } else if (MetaIndex->Status != StatAuthError) { std::string const FinalFile = MetaIndex->GetFinalFilename(); if (TransactionManager->IMSHit == false) TransactionManager->TransactionStageCopy(MetaIndex, MetaIndex->DestFile, FinalFile); else TransactionManager->TransactionStageCopy(MetaIndex, FinalFile, FinalFile); } } /*}}}*/ void pkgAcqMetaSig::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf)/*{{{*/ { Item::Failed(Message,Cnf); // check if we need to fail at this point if (MetaIndex->AuthPass == true && MetaIndex->CheckStopAuthentication(this, Message)) return; // ensures that a Release.gpg file in the lists/ is removed by the transaction TransactionManager->TransactionStageRemoval(this, DestFile); // only allow going further if the user explicitly wants it if (AllowInsecureRepositories(InsecureType::UNSIGNED, MetaIndex->Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true) { string const FinalRelease = MetaIndex->GetFinalFilename(); string const FinalInRelease = TransactionManager->GetFinalFilename(); LoadLastMetaIndexParser(TransactionManager, FinalRelease, FinalInRelease); // we parse the indexes here because at this point the user wanted // a repository that may potentially harm him bool const GoodLoad = TransactionManager->MetaIndexParser->Load(MetaIndex->DestFile, &ErrorText); if (MetaIndex->VerifyVendor(Message) == false) /* expired Release files are still a problem you need extra force for */; else TransactionManager->QueueIndexes(GoodLoad); TransactionManager->TransactionStageCopy(MetaIndex, MetaIndex->DestFile, FinalRelease); } else if (TransactionManager->IMSHit == false) Rename(MetaIndex->DestFile, MetaIndex->DestFile + ".FAILED"); // FIXME: this is used often (e.g. in pkgAcqIndexTrans) so refactor if (Cnf->LocalOnly == true || StringToBool(LookupTag(Message,"Transient-Failure"),false) == false) { // Ignore this Status = StatDone; } } /*}}}*/ // AcqBaseIndex - Constructor /*{{{*/ pkgAcqBaseIndex::pkgAcqBaseIndex(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &Target) : pkgAcqTransactionItem(Owner, TransactionManager, Target), d(NULL) { } /*}}}*/ void pkgAcqBaseIndex::Failed(std::string const &Message,pkgAcquire::MethodConfig const * const Cnf)/*{{{*/ { pkgAcquire::Item::Failed(Message, Cnf); if (Status != StatAuthError) return; ErrorText.append("Release file created at: "); auto const timespec = TransactionManager->MetaIndexParser->GetDate(); if (timespec == 0) ErrorText.append(""); else ErrorText.append(TimeRFC1123(timespec, true)); ErrorText.append("\n"); } /*}}}*/ pkgAcqBaseIndex::~pkgAcqBaseIndex() {} // AcqDiffIndex::AcqDiffIndex - Constructor /*{{{*/ // --------------------------------------------------------------------- /* Get the DiffIndex file first and see if there are patches available * If so, create a pkgAcqIndexDiffs fetcher that will get and apply the * patches. If anything goes wrong in that process, it will fall back to * the original packages file */ pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &Target) : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), diffs(NULL) { // FIXME: Magic number as an upper bound on pdiffs we will reasonably acquire ExpectedAdditionalItems = 40; Debug = _config->FindB("Debug::pkgAcquire::Diffs",false); Desc.Owner = this; Desc.Description = GetDiffIndexFileName(Target.Description); Desc.ShortDesc = Target.ShortDesc; Desc.URI = GetDiffIndexURI(Target); DestFile = GetPartialFileNameFromURI(Desc.URI); if(Debug) std::clog << "pkgAcqDiffIndex: " << Desc.URI << std::endl; QueueURI(Desc); } /*}}}*/ // AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- /* The only header we use is the last-modified header. */ string pkgAcqDiffIndex::Custom600Headers() const { if (TransactionManager->LastMetaIndexParser != NULL) return "\nIndex-File: true"; string const Final = GetFinalFilename(); if(Debug) std::clog << "Custom600Header-IMS: " << Final << std::endl; struct stat Buf; if (stat(Final.c_str(),&Buf) != 0) return "\nIndex-File: true"; return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime, false); } /*}}}*/ void pkgAcqDiffIndex::QueueOnIMSHit() const /*{{{*/ { // list cleanup needs to know that this file as well as the already // present index is ours, so we create an empty diff to save it for us new pkgAcqIndexDiffs(Owner, TransactionManager, Target); } /*}}}*/ static bool RemoveFileForBootstrapLinking(bool const Debug, std::string const &For, std::string const &Boot)/*{{{*/ { if (FileExists(Boot) && RemoveFile("Bootstrap-linking", Boot) == false) { if (Debug) std::clog << "Bootstrap-linking for patching " << For << " by removing stale " << Boot << " failed!" << std::endl; return false; } return true; } /*}}}*/ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/ { ExpectedAdditionalItems = 0; // failing here is fine: our caller will take care of trying to // get the complete file if patching fails if(Debug) std::clog << "pkgAcqDiffIndex::ParseIndexDiff() " << IndexDiffFile << std::endl; FileFd Fd(IndexDiffFile,FileFd::ReadOnly); pkgTagFile TF(&Fd); if (Fd.IsOpen() == false || Fd.Failed()) return false; pkgTagSection Tags; if(unlikely(TF.Step(Tags) == false)) return false; HashStringList ServerHashes; unsigned long long ServerSize = 0; auto const &posix = std::locale("C.UTF-8"); for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type) { std::string tagname = *type; tagname.append("-Current"); std::string const tmp = Tags.FindS(tagname.c_str()); if (tmp.empty() == true) continue; string hash; unsigned long long size; std::stringstream ss(tmp); ss.imbue(posix); ss >> hash >> size; if (unlikely(hash.empty() == true)) continue; if (unlikely(ServerSize != 0 && ServerSize != size)) continue; ServerHashes.push_back(HashString(*type, hash)); ServerSize = size; } if (ServerHashes.usable() == false) { if (Debug == true) std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": Did not find a good hashsum in the index" << std::endl; return false; } std::string const CurrentPackagesFile = GetFinalFileNameFromURI(Target.URI); HashStringList const TargetFileHashes = GetExpectedHashesFor(Target.MetaKey); if (TargetFileHashes.usable() == false || ServerHashes != TargetFileHashes) { if (Debug == true) { std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": Index has different hashes than parser, probably older, so fail pdiffing" << std::endl; printHashSumComparison(CurrentPackagesFile, ServerHashes, TargetFileHashes); } return false; } HashStringList LocalHashes; // try avoiding calculating the hash here as this is costly if (TransactionManager->LastMetaIndexParser != NULL) LocalHashes = GetExpectedHashesFromFor(TransactionManager->LastMetaIndexParser, Target.MetaKey); if (LocalHashes.usable() == false) { FileFd fd(CurrentPackagesFile, FileFd::ReadOnly, FileFd::Auto); Hashes LocalHashesCalc(ServerHashes); LocalHashesCalc.AddFD(fd); LocalHashes = LocalHashesCalc.GetHashStringList(); } if (ServerHashes == LocalHashes) { // we have the same sha1 as the server so we are done here if(Debug) std::clog << "pkgAcqDiffIndex: Package file " << CurrentPackagesFile << " is up-to-date" << std::endl; QueueOnIMSHit(); return true; } if(Debug) std::clog << "Server-Current: " << ServerHashes.find(NULL)->toStr() << " and we start at " << CurrentPackagesFile << " " << LocalHashes.FileSize() << " " << LocalHashes.find(NULL)->toStr() << std::endl; // historically, older hashes have more info than newer ones, so start // collecting with older ones first to avoid implementing complicated // information merging techniques… a failure is after all always // recoverable with a complete file and hashes aren't changed that often. std::vector types; for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type) types.push_back(*type); // parse all of (provided) history vector available_patches; bool firstAcceptedHashes = true; for (auto type = types.crbegin(); type != types.crend(); ++type) { if (LocalHashes.find(*type) == NULL) continue; std::string tagname = *type; tagname.append("-History"); std::string const tmp = Tags.FindS(tagname.c_str()); if (tmp.empty() == true) continue; string hash, filename; unsigned long long size; std::stringstream ss(tmp); ss.imbue(posix); while (ss >> hash >> size >> filename) { if (unlikely(hash.empty() == true || filename.empty() == true)) continue; // see if we have a record for this file already std::vector::iterator cur = available_patches.begin(); for (; cur != available_patches.end(); ++cur) { if (cur->file != filename) continue; cur->result_hashes.push_back(HashString(*type, hash)); break; } if (cur != available_patches.end()) continue; if (firstAcceptedHashes == true) { DiffInfo next; next.file = filename; next.result_hashes.push_back(HashString(*type, hash)); next.result_hashes.FileSize(size); available_patches.push_back(next); } else { if (Debug == true) std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": File " << filename << " wasn't in the list for the first parsed hash! (history)" << std::endl; break; } } firstAcceptedHashes = false; } if (unlikely(available_patches.empty() == true)) { if (Debug) std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": " << "Couldn't find any patches for the patch series." << std::endl; return false; } for (auto type = types.crbegin(); type != types.crend(); ++type) { if (LocalHashes.find(*type) == NULL) continue; std::string tagname = *type; tagname.append("-Patches"); std::string const tmp = Tags.FindS(tagname.c_str()); if (tmp.empty() == true) continue; string hash, filename; unsigned long long size; std::stringstream ss(tmp); ss.imbue(posix); while (ss >> hash >> size >> filename) { if (unlikely(hash.empty() == true || filename.empty() == true)) continue; // see if we have a record for this file already std::vector::iterator cur = available_patches.begin(); for (; cur != available_patches.end(); ++cur) { if (cur->file != filename) continue; if (cur->patch_hashes.empty()) cur->patch_hashes.FileSize(size); cur->patch_hashes.push_back(HashString(*type, hash)); break; } if (cur != available_patches.end()) continue; if (Debug == true) std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": File " << filename << " wasn't in the list for the first parsed hash! (patches)" << std::endl; break; } } for (auto type = types.crbegin(); type != types.crend(); ++type) { std::string tagname = *type; tagname.append("-Download"); std::string const tmp = Tags.FindS(tagname.c_str()); if (tmp.empty() == true) continue; string hash, filename; unsigned long long size; std::stringstream ss(tmp); ss.imbue(posix); // FIXME: all of pdiff supports only .gz compressed patches while (ss >> hash >> size >> filename) { if (unlikely(hash.empty() == true || filename.empty() == true)) continue; if (unlikely(APT::String::Endswith(filename, ".gz") == false)) continue; filename.erase(filename.length() - 3); // see if we have a record for this file already std::vector::iterator cur = available_patches.begin(); for (; cur != available_patches.end(); ++cur) { if (cur->file != filename) continue; if (cur->download_hashes.empty()) cur->download_hashes.FileSize(size); cur->download_hashes.push_back(HashString(*type, hash)); break; } if (cur != available_patches.end()) continue; if (Debug == true) std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": File " << filename << " wasn't in the list for the first parsed hash! (download)" << std::endl; break; } } bool foundStart = false; for (std::vector::iterator cur = available_patches.begin(); cur != available_patches.end(); ++cur) { if (LocalHashes != cur->result_hashes) continue; available_patches.erase(available_patches.begin(), cur); foundStart = true; break; } if (foundStart == false || unlikely(available_patches.empty() == true)) { if (Debug) std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": " << "Couldn't find the start of the patch series." << std::endl; return false; } for (auto const &patch: available_patches) if (patch.result_hashes.usable() == false || patch.patch_hashes.usable() == false || patch.download_hashes.usable() == false) { if (Debug) std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": provides no usable hashes for " << patch.file << " so fallback to complete download" << std::endl; return false; } // patching with too many files is rather slow compared to a fast download unsigned long const fileLimit = _config->FindI("Acquire::PDiffs::FileLimit", 0); if (fileLimit != 0 && fileLimit < available_patches.size()) { if (Debug) std::clog << "Need " << available_patches.size() << " diffs (Limit is " << fileLimit << ") so fallback to complete download" << std::endl; return false; } // calculate the size of all patches we have to get unsigned short const sizeLimitPercent = _config->FindI("Acquire::PDiffs::SizeLimit", 100); if (sizeLimitPercent > 0) { unsigned long long downloadSize = std::accumulate(available_patches.begin(), available_patches.end(), 0llu, [](unsigned long long const T, DiffInfo const &I) { return T + I.download_hashes.FileSize(); }); if (downloadSize != 0) { unsigned long long downloadSizeIdx = 0; auto const types = VectorizeString(Target.Option(IndexTarget::COMPRESSIONTYPES), ' '); for (auto const &t : types) { std::string MetaKey = Target.MetaKey; if (t != "uncompressed") MetaKey += '.' + t; HashStringList const hsl = GetExpectedHashesFor(MetaKey); if (unlikely(hsl.usable() == false)) continue; downloadSizeIdx = hsl.FileSize(); break; } unsigned long long const sizeLimit = downloadSizeIdx * sizeLimitPercent; if ((sizeLimit/100) < downloadSize) { if (Debug) std::clog << "Need " << downloadSize << " compressed bytes (Limit is " << (sizeLimit/100) << ", " << "original is " << downloadSizeIdx << ") so fallback to complete download" << std::endl; return false; } } } // we have something, queue the diffs string::size_type const last_space = Description.rfind(" "); if(last_space != string::npos) Description.erase(last_space, Description.size()-last_space); /* decide if we should download patches one by one or in one go: The first is good if the server merges patches, but many don't so client based merging can be attempt in which case the second is better. "bad things" will happen if patches are merged on the server, but client side merging is attempt as well */ bool pdiff_merge = _config->FindB("Acquire::PDiffs::Merge", true); if (pdiff_merge == true) { // reprepro adds this flag if it has merged patches on the server std::string const precedence = Tags.FindS("X-Patch-Precedence"); pdiff_merge = (precedence != "merged"); } // clean the plate { std::string const Final = GetExistingFilename(CurrentPackagesFile); if (unlikely(Final.empty())) // because we wouldn't be called in such a case return false; std::string const PartialFile = GetPartialFileNameFromURI(Target.URI); std::string const PatchedFile = GetKeepCompressedFileName(PartialFile + "-patched", Target); if (RemoveFileForBootstrapLinking(Debug, CurrentPackagesFile, PartialFile) == false || RemoveFileForBootstrapLinking(Debug, CurrentPackagesFile, PatchedFile) == false) return false; for (auto const &ext : APT::Configuration::getCompressorExtensions()) { if (RemoveFileForBootstrapLinking(Debug, CurrentPackagesFile, PartialFile + ext) == false || RemoveFileForBootstrapLinking(Debug, CurrentPackagesFile, PatchedFile + ext) == false) return false; } std::string const Ext = Final.substr(CurrentPackagesFile.length()); std::string const Partial = PartialFile + Ext; if (symlink(Final.c_str(), Partial.c_str()) != 0) { if (Debug) std::clog << "Bootstrap-linking for patching " << CurrentPackagesFile << " by linking " << Final << " to " << Partial << " failed!" << std::endl; return false; } } if (pdiff_merge == false) new pkgAcqIndexDiffs(Owner, TransactionManager, Target, available_patches); else { diffs = new std::vector(available_patches.size()); for(size_t i = 0; i < available_patches.size(); ++i) (*diffs)[i] = new pkgAcqIndexMergeDiffs(Owner, TransactionManager, Target, available_patches[i], diffs); } Complete = false; Status = StatDone; Dequeue(); return true; } /*}}}*/ void pkgAcqDiffIndex::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf)/*{{{*/ { pkgAcqBaseIndex::Failed(Message,Cnf); Status = StatDone; ExpectedAdditionalItems = 0; if(Debug) std::clog << "pkgAcqDiffIndex failed: " << Desc.URI << " with " << Message << std::endl << "Falling back to normal index file acquire" << std::endl; new pkgAcqIndex(Owner, TransactionManager, Target); } /*}}}*/ void pkgAcqDiffIndex::Done(string const &Message,HashStringList const &Hashes, /*{{{*/ pkgAcquire::MethodConfig const * const Cnf) { if(Debug) std::clog << "pkgAcqDiffIndex::Done(): " << Desc.URI << std::endl; Item::Done(Message, Hashes, Cnf); string const FinalFile = GetFinalFilename(); if(StringToBool(LookupTag(Message,"IMS-Hit"),false)) DestFile = FinalFile; if(ParseDiffIndex(DestFile) == false) { Failed("Message: Couldn't parse pdiff index", Cnf); // queue for final move - this should happen even if we fail // while parsing (e.g. on sizelimit) and download the complete file. TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); return; } TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); Complete = true; Status = StatDone; Dequeue(); return; } /*}}}*/ pkgAcqDiffIndex::~pkgAcqDiffIndex() { if (diffs != NULL) delete diffs; } // AcqIndexDiffs::AcqIndexDiffs - Constructor /*{{{*/ // --------------------------------------------------------------------- /* The package diff is added to the queue. one object is constructed * for each diff and the index */ pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &Target, vector const &diffs) : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), available_patches(diffs) { DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target); Debug = _config->FindB("Debug::pkgAcquire::Diffs",false); Desc.Owner = this; Description = Target.Description; Desc.ShortDesc = Target.ShortDesc; if(available_patches.empty() == true) { // we are done (yeah!), check hashes against the final file DestFile = GetKeepCompressedFileName(GetFinalFileNameFromURI(Target.URI), Target); Finish(true); } else { State = StateFetchDiff; QueueNextDiff(); } } /*}}}*/ void pkgAcqIndexDiffs::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf)/*{{{*/ { pkgAcqBaseIndex::Failed(Message,Cnf); Status = StatDone; DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target); if(Debug) std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << " with " << Message << std::endl << "Falling back to normal index file acquire " << std::endl; RenameOnError(PDiffError); std::string const patchname = GetDiffsPatchFileName(DestFile); if (RealFileExists(patchname)) Rename(patchname, patchname + ".FAILED"); std::string const UnpatchedFile = GetExistingFilename(GetPartialFileNameFromURI(Target.URI)); if (UnpatchedFile.empty() == false && FileExists(UnpatchedFile)) Rename(UnpatchedFile, UnpatchedFile + ".FAILED"); new pkgAcqIndex(Owner, TransactionManager, Target); Finish(); } /*}}}*/ // Finish - helper that cleans the item out of the fetcher queue /*{{{*/ void pkgAcqIndexDiffs::Finish(bool allDone) { if(Debug) std::clog << "pkgAcqIndexDiffs::Finish(): " << allDone << " " << Desc.URI << std::endl; // we restore the original name, this is required, otherwise // the file will be cleaned if(allDone) { std::string const Final = GetKeepCompressedFileName(GetFinalFilename(), Target); TransactionManager->TransactionStageCopy(this, DestFile, Final); // this is for the "real" finish Complete = true; Status = StatDone; Dequeue(); if(Debug) std::clog << "\n\nallDone: " << DestFile << "\n" << std::endl; return; } else DestFile.clear(); if(Debug) std::clog << "Finishing: " << Desc.URI << std::endl; Complete = false; Status = StatDone; Dequeue(); return; } /*}}}*/ bool pkgAcqIndexDiffs::QueueNextDiff() /*{{{*/ { // calc sha1 of the just patched file std::string const PartialFile = GetExistingFilename(GetPartialFileNameFromURI(Target.URI)); if(unlikely(PartialFile.empty())) { Failed("Message: The file " + GetPartialFileNameFromURI(Target.URI) + " isn't available", NULL); return false; } FileFd fd(PartialFile, FileFd::ReadOnly, FileFd::Extension); Hashes LocalHashesCalc; LocalHashesCalc.AddFD(fd); HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList(); if(Debug) std::clog << "QueueNextDiff: " << PartialFile << " (" << LocalHashes.find(NULL)->toStr() << ")" << std::endl; HashStringList const TargetFileHashes = GetExpectedHashesFor(Target.MetaKey); if (unlikely(LocalHashes.usable() == false || TargetFileHashes.usable() == false)) { Failed("Local/Expected hashes are not usable for " + PartialFile, NULL); return false; } // final file reached before all patches are applied if(LocalHashes == TargetFileHashes) { Finish(true); return true; } // remove all patches until the next matching patch is found // this requires the Index file to be ordered available_patches.erase(available_patches.begin(), std::find_if(available_patches.begin(), available_patches.end(), [&](DiffInfo const &I) { return I.result_hashes == LocalHashes; })); // error checking and falling back if no patch was found if(available_patches.empty() == true) { Failed("No patches left to reach target for " + PartialFile, NULL); return false; } // queue the right diff Desc.URI = Target.URI + ".diff/" + available_patches[0].file + ".gz"; Desc.Description = Description + " " + available_patches[0].file + string(".pdiff"); DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI + ".diff/" + available_patches[0].file), Target); if(Debug) std::clog << "pkgAcqIndexDiffs::QueueNextDiff(): " << Desc.URI << std::endl; QueueURI(Desc); return true; } /*}}}*/ void pkgAcqIndexDiffs::Done(string const &Message, HashStringList const &Hashes, /*{{{*/ pkgAcquire::MethodConfig const * const Cnf) { if (Debug) std::clog << "pkgAcqIndexDiffs::Done(): " << Desc.URI << std::endl; Item::Done(Message, Hashes, Cnf); std::string const UncompressedUnpatchedFile = GetPartialFileNameFromURI(Target.URI); std::string const UnpatchedFile = GetExistingFilename(UncompressedUnpatchedFile); std::string const PatchFile = GetDiffsPatchFileName(UnpatchedFile); std::string const PatchedFile = GetKeepCompressedFileName(UncompressedUnpatchedFile, Target); switch (State) { // success in downloading a diff, enter ApplyDiff state case StateFetchDiff: Rename(DestFile, PatchFile); DestFile = GetKeepCompressedFileName(UncompressedUnpatchedFile + "-patched", Target); if(Debug) std::clog << "Sending to rred method: " << UnpatchedFile << std::endl; State = StateApplyDiff; Local = true; Desc.URI = "rred:" + UnpatchedFile; QueueURI(Desc); SetActiveSubprocess("rred"); return; // success in download/apply a diff, queue next (if needed) case StateApplyDiff: // remove the just applied patch and base file available_patches.erase(available_patches.begin()); RemoveFile("pkgAcqIndexDiffs::Done", PatchFile); RemoveFile("pkgAcqIndexDiffs::Done", UnpatchedFile); if(Debug) std::clog << "Moving patched file in place: " << std::endl << DestFile << " -> " << PatchedFile << std::endl; Rename(DestFile, PatchedFile); // see if there is more to download if(available_patches.empty() == false) { new pkgAcqIndexDiffs(Owner, TransactionManager, Target, available_patches); Finish(); } else { DestFile = PatchedFile; Finish(true); } return; } } /*}}}*/ std::string pkgAcqIndexDiffs::Custom600Headers() const /*{{{*/ { if(State != StateApplyDiff) return pkgAcqBaseIndex::Custom600Headers(); std::ostringstream patchhashes; for (auto && hs : available_patches[0].result_hashes) patchhashes << "\nStart-" << hs.HashType() << "-Hash: " << hs.HashValue(); for (auto && hs : available_patches[0].patch_hashes) patchhashes << "\nPatch-0-" << hs.HashType() << "-Hash: " << hs.HashValue(); patchhashes << pkgAcqBaseIndex::Custom600Headers(); return patchhashes.str(); } /*}}}*/ pkgAcqIndexDiffs::~pkgAcqIndexDiffs() {} // AcqIndexMergeDiffs::AcqIndexMergeDiffs - Constructor /*{{{*/ pkgAcqIndexMergeDiffs::pkgAcqIndexMergeDiffs(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &Target, DiffInfo const &patch, std::vector const * const allPatches) : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), patch(patch), allPatches(allPatches), State(StateFetchDiff) { Debug = _config->FindB("Debug::pkgAcquire::Diffs",false); Desc.Owner = this; Description = Target.Description; Desc.ShortDesc = Target.ShortDesc; Desc.URI = Target.URI + ".diff/" + patch.file + ".gz"; Desc.Description = Description + " " + patch.file + ".pdiff"; DestFile = GetPartialFileNameFromURI(Desc.URI); if(Debug) std::clog << "pkgAcqIndexMergeDiffs: " << Desc.URI << std::endl; QueueURI(Desc); } /*}}}*/ void pkgAcqIndexMergeDiffs::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf)/*{{{*/ { if(Debug) std::clog << "pkgAcqIndexMergeDiffs failed: " << Desc.URI << " with " << Message << std::endl; pkgAcqBaseIndex::Failed(Message,Cnf); Status = StatDone; // check if we are the first to fail, otherwise we are done here State = StateDoneDiff; for (std::vector::const_iterator I = allPatches->begin(); I != allPatches->end(); ++I) if ((*I)->State == StateErrorDiff) { State = StateErrorDiff; return; } // first failure means we should fallback State = StateErrorDiff; if (Debug) std::clog << "Falling back to normal index file acquire" << std::endl; RenameOnError(PDiffError); if (RealFileExists(DestFile)) Rename(DestFile, DestFile + ".FAILED"); std::string const UnpatchedFile = GetExistingFilename(GetPartialFileNameFromURI(Target.URI)); if (UnpatchedFile.empty() == false && FileExists(UnpatchedFile)) Rename(UnpatchedFile, UnpatchedFile + ".FAILED"); DestFile.clear(); new pkgAcqIndex(Owner, TransactionManager, Target); } /*}}}*/ void pkgAcqIndexMergeDiffs::Done(string const &Message, HashStringList const &Hashes, /*{{{*/ pkgAcquire::MethodConfig const * const Cnf) { if(Debug) std::clog << "pkgAcqIndexMergeDiffs::Done(): " << Desc.URI << std::endl; Item::Done(Message, Hashes, Cnf); if (std::any_of(allPatches->begin(), allPatches->end(), [](pkgAcqIndexMergeDiffs const * const P) { return P->State == StateErrorDiff; })) { if(Debug) std::clog << "Another patch failed already, no point in processing this one." << std::endl; State = StateErrorDiff; return; } std::string const UncompressedUnpatchedFile = GetPartialFileNameFromURI(Target.URI); std::string const UnpatchedFile = GetExistingFilename(UncompressedUnpatchedFile); if (UnpatchedFile.empty()) { _error->Fatal("Unpatched file %s doesn't exist (anymore)!", UncompressedUnpatchedFile.c_str()); State = StateErrorDiff; return; } std::string const PatchFile = GetMergeDiffsPatchFileName(UnpatchedFile, patch.file); std::string const PatchedFile = GetKeepCompressedFileName(UncompressedUnpatchedFile, Target); switch (State) { case StateFetchDiff: Rename(DestFile, PatchFile); // check if this is the last completed diff State = StateDoneDiff; for (std::vector::const_iterator I = allPatches->begin(); I != allPatches->end(); ++I) if ((*I)->State != StateDoneDiff) { if(Debug) std::clog << "Not the last done diff in the batch: " << Desc.URI << std::endl; return; } // this is the last completed diff, so we are ready to apply now DestFile = GetKeepCompressedFileName(UncompressedUnpatchedFile + "-patched", Target); if(Debug) std::clog << "Sending to rred method: " << UnpatchedFile << std::endl; State = StateApplyDiff; Local = true; Desc.URI = "rred:" + UnpatchedFile; QueueURI(Desc); SetActiveSubprocess("rred"); return; case StateApplyDiff: // success in download & apply all diffs, finialize and clean up if(Debug) std::clog << "Queue patched file in place: " << std::endl << DestFile << " -> " << PatchedFile << std::endl; // queue for copy by the transaction manager TransactionManager->TransactionStageCopy(this, DestFile, GetKeepCompressedFileName(GetFinalFilename(), Target)); // ensure the ed's are gone regardless of list-cleanup for (std::vector::const_iterator I = allPatches->begin(); I != allPatches->end(); ++I) RemoveFile("pkgAcqIndexMergeDiffs::Done", GetMergeDiffsPatchFileName(UnpatchedFile, (*I)->patch.file)); RemoveFile("pkgAcqIndexMergeDiffs::Done", UnpatchedFile); // all set and done Complete = true; if(Debug) std::clog << "allDone: " << DestFile << "\n" << std::endl; return; case StateDoneDiff: _error->Fatal("Done called for %s which is in an invalid Done state", PatchFile.c_str()); break; case StateErrorDiff: _error->Fatal("Done called for %s which is in an invalid Error state", PatchFile.c_str()); break; } } /*}}}*/ std::string pkgAcqIndexMergeDiffs::Custom600Headers() const /*{{{*/ { if(State != StateApplyDiff) return pkgAcqBaseIndex::Custom600Headers(); std::ostringstream patchhashes; unsigned int seen_patches = 0; for (auto && hs : (*allPatches)[0]->patch.result_hashes) patchhashes << "\nStart-" << hs.HashType() << "-Hash: " << hs.HashValue(); for (std::vector::const_iterator I = allPatches->begin(); I != allPatches->end(); ++I) { HashStringList const ExpectedHashes = (*I)->patch.patch_hashes; for (HashStringList::const_iterator hs = ExpectedHashes.begin(); hs != ExpectedHashes.end(); ++hs) patchhashes << "\nPatch-" << std::to_string(seen_patches) << "-" << hs->HashType() << "-Hash: " << hs->HashValue(); ++seen_patches; } patchhashes << pkgAcqBaseIndex::Custom600Headers(); return patchhashes.str(); } /*}}}*/ pkgAcqIndexMergeDiffs::~pkgAcqIndexMergeDiffs() {} // AcqIndex::AcqIndex - Constructor /*{{{*/ pkgAcqIndex::pkgAcqIndex(pkgAcquire * const Owner, pkgAcqMetaClearSig * const TransactionManager, IndexTarget const &Target) : pkgAcqBaseIndex(Owner, TransactionManager, Target), d(NULL), Stage(STAGE_DOWNLOAD), CompressionExtensions(Target.Option(IndexTarget::COMPRESSIONTYPES)) { Init(Target.URI, Target.Description, Target.ShortDesc); if(_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "New pkgIndex with TransactionManager " << TransactionManager << std::endl; } /*}}}*/ // AcqIndex::Init - defered Constructor /*{{{*/ static void NextCompressionExtension(std::string &CurrentCompressionExtension, std::string &CompressionExtensions, bool const preview) { size_t const nextExt = CompressionExtensions.find(' '); if (nextExt == std::string::npos) { CurrentCompressionExtension = CompressionExtensions; if (preview == false) CompressionExtensions.clear(); } else { CurrentCompressionExtension = CompressionExtensions.substr(0, nextExt); if (preview == false) CompressionExtensions = CompressionExtensions.substr(nextExt+1); } } void pkgAcqIndex::Init(string const &URI, string const &URIDesc, string const &ShortDesc) { Stage = STAGE_DOWNLOAD; DestFile = GetPartialFileNameFromURI(URI); NextCompressionExtension(CurrentCompressionExtension, CompressionExtensions, false); // store file size of the download to ensure the fetcher gives // accurate progress reporting FileSize = GetExpectedHashes().FileSize(); if (CurrentCompressionExtension == "uncompressed") { Desc.URI = URI; } else if (CurrentCompressionExtension == "by-hash") { NextCompressionExtension(CurrentCompressionExtension, CompressionExtensions, true); if(unlikely(CurrentCompressionExtension.empty())) return; if (CurrentCompressionExtension != "uncompressed") { Desc.URI = URI + '.' + CurrentCompressionExtension; DestFile = DestFile + '.' + CurrentCompressionExtension; } HashStringList const Hashes = GetExpectedHashes(); HashString const * const TargetHash = Hashes.find(NULL); if (unlikely(TargetHash == nullptr)) return; std::string const ByHash = "/by-hash/" + TargetHash->HashType() + "/" + TargetHash->HashValue(); size_t const trailing_slash = Desc.URI.find_last_of("/"); if (unlikely(trailing_slash == std::string::npos)) return; Desc.URI = Desc.URI.replace( trailing_slash, Desc.URI.substr(trailing_slash+1).size()+1, ByHash); } else if (unlikely(CurrentCompressionExtension.empty())) return; else { Desc.URI = URI + '.' + CurrentCompressionExtension; DestFile = DestFile + '.' + CurrentCompressionExtension; } Desc.Description = URIDesc; Desc.Owner = this; Desc.ShortDesc = ShortDesc; QueueURI(Desc); } /*}}}*/ // AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- /* The only header we use is the last-modified header. */ string pkgAcqIndex::Custom600Headers() const { string msg = "\nIndex-File: true"; if (TransactionManager->LastMetaIndexParser == NULL) { std::string const Final = GetFinalFilename(); struct stat Buf; if (stat(Final.c_str(),&Buf) == 0) msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime, false); } if(Target.IsOptional) msg += "\nFail-Ignore: true"; return msg; } /*}}}*/ // AcqIndex::Failed - getting the indexfile failed /*{{{*/ void pkgAcqIndex::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf) { pkgAcqBaseIndex::Failed(Message,Cnf); // authorisation matches will not be fixed by other compression types if (Status != StatAuthError) { if (CompressionExtensions.empty() == false) { Init(Target.URI, Desc.Description, Desc.ShortDesc); Status = StatIdle; return; } } if(Target.IsOptional && GetExpectedHashes().empty() && Stage == STAGE_DOWNLOAD) Status = StatDone; else TransactionManager->AbortTransaction(); } /*}}}*/ // AcqIndex::Done - Finished a fetch /*{{{*/ // --------------------------------------------------------------------- /* This goes through a number of states.. On the initial fetch the method could possibly return an alternate filename which points to the uncompressed version of the file. If this is so the file is copied into the partial directory. In all other cases the file is decompressed with a compressed uri. */ void pkgAcqIndex::Done(string const &Message, HashStringList const &Hashes, pkgAcquire::MethodConfig const * const Cfg) { Item::Done(Message,Hashes,Cfg); switch(Stage) { case STAGE_DOWNLOAD: StageDownloadDone(Message); break; case STAGE_DECOMPRESS_AND_VERIFY: StageDecompressDone(); break; } } /*}}}*/ // AcqIndex::StageDownloadDone - Queue for decompress and verify /*{{{*/ void pkgAcqIndex::StageDownloadDone(string const &Message) { Local = true; Complete = true; std::string const AltFilename = LookupTag(Message,"Alt-Filename"); std::string Filename = LookupTag(Message,"Filename"); // we need to verify the file against the current Release file again // on if-modfied-since hit to avoid a stale attack against us if(StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) { // copy FinalFile into partial/ so that we check the hash again string const FinalFile = GetExistingFilename(GetFinalFileNameFromURI(Target.URI)); if (symlink(FinalFile.c_str(), DestFile.c_str()) != 0) _error->WarningE("pkgAcqIndex::StageDownloadDone", "Symlinking final file %s back to %s failed", FinalFile.c_str(), DestFile.c_str()); else { EraseFileName = DestFile; Filename = DestFile; } Stage = STAGE_DECOMPRESS_AND_VERIFY; Desc.URI = "store:" + Filename; QueueURI(Desc); SetActiveSubprocess(::URI(Desc.URI).Access); return; } // methods like file:// give us an alternative (uncompressed) file else if (Target.KeepCompressed == false && AltFilename.empty() == false) { Filename = AltFilename; EraseFileName.clear(); } // Methods like e.g. "file:" will give us a (compressed) FileName that is // not the "DestFile" we set, in this case we uncompress from the local file else if (Filename != DestFile && RealFileExists(DestFile) == false) { // symlinking ensures that the filename can be used for compression detection // that is e.g. needed for by-hash which has no extension over file if (symlink(Filename.c_str(),DestFile.c_str()) != 0) _error->WarningE("pkgAcqIndex::StageDownloadDone", "Symlinking file %s to %s failed", Filename.c_str(), DestFile.c_str()); else { EraseFileName = DestFile; Filename = DestFile; } } Stage = STAGE_DECOMPRESS_AND_VERIFY; DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target); if (Filename != DestFile && flExtension(Filename) == flExtension(DestFile)) Desc.URI = "copy:" + Filename; else Desc.URI = "store:" + Filename; if (DestFile == Filename) { if (CurrentCompressionExtension == "uncompressed") return StageDecompressDone(); DestFile = "/dev/null"; } if (EraseFileName.empty() && Filename != AltFilename) EraseFileName = Filename; // queue uri for the next stage QueueURI(Desc); SetActiveSubprocess(::URI(Desc.URI).Access); } /*}}}*/ // AcqIndex::StageDecompressDone - Final verification /*{{{*/ void pkgAcqIndex::StageDecompressDone() { if (DestFile == "/dev/null") DestFile = GetKeepCompressedFileName(GetPartialFileNameFromURI(Target.URI), Target); // Done, queue for rename on transaction finished TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename()); } /*}}}*/ pkgAcqIndex::~pkgAcqIndex() {} // AcqArchive::AcqArchive - Constructor /*{{{*/ // --------------------------------------------------------------------- /* This just sets up the initial fetch environment and queues the first possibilitiy */ pkgAcqArchive::pkgAcqArchive(pkgAcquire * const Owner,pkgSourceList * const Sources, pkgRecords * const Recs,pkgCache::VerIterator const &Version, string &StoreFilename) : Item(Owner), d(NULL), LocalSource(false), Version(Version), Sources(Sources), Recs(Recs), StoreFilename(StoreFilename), Vf(Version.FileList()), Trusted(false) { Retries = _config->FindI("Acquire::Retries",0); if (Version.Arch() == 0) { _error->Error(_("I wasn't able to locate a file for the %s package. " "This might mean you need to manually fix this package. " "(due to missing arch)"), Version.ParentPkg().FullName().c_str()); return; } /* We need to find a filename to determine the extension. We make the assumption here that all the available sources for this version share the same extension.. */ // Skip not source sources, they do not have file fields. for (; Vf.end() == false; ++Vf) { if (Vf.File().Flagged(pkgCache::Flag::NotSource)) continue; break; } // Does not really matter here.. we are going to fail out below if (Vf.end() != true) { // If this fails to get a file name we will bomb out below. pkgRecords::Parser &Parse = Recs->Lookup(Vf); if (_error->PendingError() == true) return; // Generate the final file name as: package_version_arch.foo StoreFilename = QuoteString(Version.ParentPkg().Name(),"_:") + '_' + QuoteString(Version.VerStr(),"_:") + '_' + QuoteString(Version.Arch(),"_:.") + "." + flExtension(Parse.FileName()); } // check if we have one trusted source for the package. if so, switch // to "TrustedOnly" mode - but only if not in AllowUnauthenticated mode bool const allowUnauth = _config->FindB("APT::Get::AllowUnauthenticated", false); bool const debugAuth = _config->FindB("Debug::pkgAcquire::Auth", false); bool seenUntrusted = false; for (pkgCache::VerFileIterator i = Version.FileList(); i.end() == false; ++i) { pkgIndexFile *Index; if (Sources->FindIndex(i.File(),Index) == false) continue; if (debugAuth == true) std::cerr << "Checking index: " << Index->Describe() << "(Trusted=" << Index->IsTrusted() << ")" << std::endl; if (Index->IsTrusted() == true) { Trusted = true; if (allowUnauth == false) break; } else seenUntrusted = true; } // "allow-unauthenticated" restores apts old fetching behaviour // that means that e.g. unauthenticated file:// uris are higher // priority than authenticated http:// uris if (allowUnauth == true && seenUntrusted == true) Trusted = false; // Select a source if (QueueNext() == false && _error->PendingError() == false) _error->Error(_("Can't find a source to download version '%s' of '%s'"), Version.VerStr(), Version.ParentPkg().FullName(false).c_str()); } /*}}}*/ // AcqArchive::QueueNext - Queue the next file source /*{{{*/ // --------------------------------------------------------------------- /* This queues the next available file version for download. It checks if the archive is already available in the cache and stashs the MD5 for checking later. */ bool pkgAcqArchive::QueueNext() { for (; Vf.end() == false; ++Vf) { pkgCache::PkgFileIterator const PkgF = Vf.File(); // Ignore not source sources if (PkgF.Flagged(pkgCache::Flag::NotSource)) continue; // Try to cross match against the source list pkgIndexFile *Index; if (Sources->FindIndex(PkgF, Index) == false) continue; LocalSource = PkgF.Flagged(pkgCache::Flag::LocalSource); // only try to get a trusted package from another source if that source // is also trusted if(Trusted && !Index->IsTrusted()) continue; // Grab the text package record pkgRecords::Parser &Parse = Recs->Lookup(Vf); if (_error->PendingError() == true) return false; string PkgFile = Parse.FileName(); ExpectedHashes = Parse.Hashes(); if (PkgFile.empty() == true) return _error->Error(_("The package index files are corrupted. No Filename: " "field for package %s."), Version.ParentPkg().Name()); Desc.URI = Index->ArchiveURI(PkgFile); Desc.Description = Index->ArchiveInfo(Version); Desc.Owner = this; Desc.ShortDesc = Version.ParentPkg().FullName(true); // See if we already have the file. (Legacy filenames) FileSize = Version->Size; string FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(PkgFile); struct stat Buf; if (stat(FinalFile.c_str(),&Buf) == 0) { // Make sure the size matches if ((unsigned long long)Buf.st_size == Version->Size) { Complete = true; Local = true; Status = StatDone; StoreFilename = DestFile = FinalFile; return true; } /* Hmm, we have a file and its size does not match, this means it is an old style mismatched arch */ RemoveFile("pkgAcqArchive::QueueNext", FinalFile); } // Check it again using the new style output filenames FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(StoreFilename); if (stat(FinalFile.c_str(),&Buf) == 0) { // Make sure the size matches if ((unsigned long long)Buf.st_size == Version->Size) { Complete = true; Local = true; Status = StatDone; StoreFilename = DestFile = FinalFile; return true; } /* Hmm, we have a file and its size does not match, this shouldn't happen.. */ RemoveFile("pkgAcqArchive::QueueNext", FinalFile); } DestFile = _config->FindDir("Dir::Cache::Archives") + "partial/" + flNotDir(StoreFilename); // Check the destination file if (stat(DestFile.c_str(),&Buf) == 0) { // Hmm, the partial file is too big, erase it if ((unsigned long long)Buf.st_size > Version->Size) RemoveFile("pkgAcqArchive::QueueNext", DestFile); else PartialSize = Buf.st_size; } // Disables download of archives - useful if no real installation follows, // e.g. if we are just interested in proposed installation order if (_config->FindB("Debug::pkgAcqArchive::NoQueue", false) == true) { Complete = true; Local = true; Status = StatDone; StoreFilename = DestFile = FinalFile; return true; } // Create the item Local = false; QueueURI(Desc); ++Vf; return true; } return false; } /*}}}*/ // AcqArchive::Done - Finished fetching /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgAcqArchive::Done(string const &Message, HashStringList const &Hashes, pkgAcquire::MethodConfig const * const Cfg) { Item::Done(Message, Hashes, Cfg); // Grab the output filename std::string const FileName = LookupTag(Message,"Filename"); if (DestFile != FileName && RealFileExists(DestFile) == false) { StoreFilename = DestFile = FileName; Local = true; Complete = true; return; } // Done, move it into position string const FinalFile = GetFinalFilename(); Rename(DestFile,FinalFile); StoreFilename = DestFile = FinalFile; Complete = true; } /*}}}*/ // AcqArchive::Failed - Failure handler /*{{{*/ // --------------------------------------------------------------------- /* Here we try other sources */ void pkgAcqArchive::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf) { Item::Failed(Message,Cnf); /* We don't really want to retry on failed media swaps, this prevents that. An interesting observation is that permanent failures are not recorded. */ if (Cnf->Removable == true && StringToBool(LookupTag(Message,"Transient-Failure"),false) == true) { // Vf = Version.FileList(); while (Vf.end() == false) ++Vf; StoreFilename = string(); return; } Status = StatIdle; if (QueueNext() == false) { // This is the retry counter if (Retries != 0 && Cnf->LocalOnly == false && StringToBool(LookupTag(Message,"Transient-Failure"),false) == true) { Retries--; Vf = Version.FileList(); if (QueueNext() == true) return; } StoreFilename = string(); Status = StatError; } } /*}}}*/ APT_PURE bool pkgAcqArchive::IsTrusted() const /*{{{*/ { return Trusted; } /*}}}*/ void pkgAcqArchive::Finished() /*{{{*/ { if (Status == pkgAcquire::Item::StatDone && Complete == true) return; StoreFilename = string(); } /*}}}*/ std::string pkgAcqArchive::DescURI() const /*{{{*/ { return Desc.URI; } /*}}}*/ std::string pkgAcqArchive::ShortDesc() const /*{{{*/ { return Desc.ShortDesc; } /*}}}*/ pkgAcqArchive::~pkgAcqArchive() {} // AcqChangelog::pkgAcqChangelog - Constructors /*{{{*/ class pkgAcqChangelog::Private { public: std::string FinalFile; }; pkgAcqChangelog::pkgAcqChangelog(pkgAcquire * const Owner, pkgCache::VerIterator const &Ver, std::string const &DestDir, std::string const &DestFilename) : pkgAcquire::Item(Owner), d(new pkgAcqChangelog::Private()), SrcName(Ver.SourcePkgName()), SrcVersion(Ver.SourceVerStr()) { Desc.URI = URI(Ver); Init(DestDir, DestFilename); } // some parameters are char* here as they come likely from char* interfaces – which can also return NULL pkgAcqChangelog::pkgAcqChangelog(pkgAcquire * const Owner, pkgCache::RlsFileIterator const &RlsFile, char const * const Component, char const * const SrcName, char const * const SrcVersion, const string &DestDir, const string &DestFilename) : pkgAcquire::Item(Owner), d(new pkgAcqChangelog::Private()), SrcName(SrcName), SrcVersion(SrcVersion) { Desc.URI = URI(RlsFile, Component, SrcName, SrcVersion); Init(DestDir, DestFilename); } pkgAcqChangelog::pkgAcqChangelog(pkgAcquire * const Owner, std::string const &URI, char const * const SrcName, char const * const SrcVersion, const string &DestDir, const string &DestFilename) : pkgAcquire::Item(Owner), d(new pkgAcqChangelog::Private()), SrcName(SrcName), SrcVersion(SrcVersion) { Desc.URI = URI; Init(DestDir, DestFilename); } void pkgAcqChangelog::Init(std::string const &DestDir, std::string const &DestFilename) { if (Desc.URI.empty()) { Status = StatError; // TRANSLATOR: %s=%s is sourcename=sourceversion, e.g. apt=1.1 strprintf(ErrorText, _("Changelog unavailable for %s=%s"), SrcName.c_str(), SrcVersion.c_str()); // Let the error message print something sensible rather than "Failed to fetch /" if (DestFilename.empty()) DestFile = SrcName + ".changelog"; else DestFile = DestFilename; Desc.URI = "changelog:/" + DestFile; return; } std::string DestFileName; if (DestFilename.empty()) DestFileName = flCombine(DestFile, SrcName + ".changelog"); else DestFileName = flCombine(DestFile, DestFilename); std::string const SandboxUser = _config->Find("APT::Sandbox::User"); std::string const systemTemp = GetTempDir(SandboxUser); char tmpname[1000]; snprintf(tmpname, sizeof(tmpname), "%s/apt-changelog-XXXXXX", systemTemp.c_str()); if (NULL == mkdtemp(tmpname)) { _error->Errno("mkdtemp", "mkdtemp failed in changelog acquire of %s %s", SrcName.c_str(), SrcVersion.c_str()); Status = StatError; return; } TemporaryDirectory = tmpname; ChangeOwnerAndPermissionOfFile("Item::QueueURI", TemporaryDirectory.c_str(), SandboxUser.c_str(), "root", 0700); DestFile = flCombine(TemporaryDirectory, DestFileName); if (DestDir.empty() == false) { d->FinalFile = flCombine(DestDir, DestFileName); if (RealFileExists(d->FinalFile)) { FileFd file1, file2; if (file1.Open(DestFile, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive) && file2.Open(d->FinalFile, FileFd::ReadOnly) && CopyFile(file2, file1)) { struct timeval times[2]; times[0].tv_sec = times[1].tv_sec = file2.ModificationTime(); times[0].tv_usec = times[1].tv_usec = 0; utimes(DestFile.c_str(), times); } } } Desc.ShortDesc = "Changelog"; strprintf(Desc.Description, "%s %s %s Changelog", URI::SiteOnly(Desc.URI).c_str(), SrcName.c_str(), SrcVersion.c_str()); Desc.Owner = this; QueueURI(Desc); } /*}}}*/ std::string pkgAcqChangelog::URI(pkgCache::VerIterator const &Ver) /*{{{*/ { std::string const confOnline = "Acquire::Changelogs::AlwaysOnline"; bool AlwaysOnline = _config->FindB(confOnline, false); if (AlwaysOnline == false) for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF) { pkgCache::PkgFileIterator const PF = VF.File(); if (PF.Flagged(pkgCache::Flag::NotSource) || PF->Release == 0) continue; pkgCache::RlsFileIterator const RF = PF.ReleaseFile(); if (RF->Origin != 0 && _config->FindB(confOnline + "::Origin::" + RF.Origin(), false)) { AlwaysOnline = true; break; } } if (AlwaysOnline == false) { pkgCache::PkgIterator const Pkg = Ver.ParentPkg(); if (Pkg->CurrentVer != 0 && Pkg.CurrentVer() == Ver) { std::string const basename = std::string("/usr/share/doc/") + Pkg.Name() + "/changelog"; std::string const debianname = basename + ".Debian"; if (FileExists(debianname)) return "copy://" + debianname; else if (FileExists(debianname + ".gz")) return "gzip://" + debianname + ".gz"; else if (FileExists(basename)) return "copy://" + basename; else if (FileExists(basename + ".gz")) return "gzip://" + basename + ".gz"; } } char const * const SrcName = Ver.SourcePkgName(); char const * const SrcVersion = Ver.SourceVerStr(); // find the first source for this version which promises a changelog for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF) { pkgCache::PkgFileIterator const PF = VF.File(); if (PF.Flagged(pkgCache::Flag::NotSource) || PF->Release == 0) continue; pkgCache::RlsFileIterator const RF = PF.ReleaseFile(); std::string const uri = URI(RF, PF.Component(), SrcName, SrcVersion); if (uri.empty()) continue; return uri; } return ""; } std::string pkgAcqChangelog::URITemplate(pkgCache::RlsFileIterator const &Rls) { if (Rls.end() == true || (Rls->Label == 0 && Rls->Origin == 0)) return ""; std::string const serverConfig = "Acquire::Changelogs::URI"; std::string server; #define APT_EMPTY_SERVER \ if (server.empty() == false) \ { \ if (server != "no") \ return server; \ return ""; \ } #define APT_CHECK_SERVER(X, Y) \ if (Rls->X != 0) \ { \ std::string const specialServerConfig = serverConfig + "::" + Y + #X + "::" + Rls.X(); \ server = _config->Find(specialServerConfig); \ APT_EMPTY_SERVER \ } // this way e.g. Debian-Security can fallback to Debian APT_CHECK_SERVER(Label, "Override::") APT_CHECK_SERVER(Origin, "Override::") if (RealFileExists(Rls.FileName())) { _error->PushToStack(); FileFd rf; /* This can be costly. A caller wanting to get millions of URIs might want to do this on its own once and use Override settings. We don't do this here as Origin/Label are not as unique as they should be so this could produce request order-dependent anomalies */ if (OpenMaybeClearSignedFile(Rls.FileName(), rf) == true) { pkgTagFile TagFile(&rf, rf.Size()); pkgTagSection Section; if (TagFile.Step(Section) == true) server = Section.FindS("Changelogs"); } _error->RevertToStack(); APT_EMPTY_SERVER } APT_CHECK_SERVER(Label, "") APT_CHECK_SERVER(Origin, "") #undef APT_CHECK_SERVER #undef APT_EMPTY_SERVER return ""; } std::string pkgAcqChangelog::URI(pkgCache::RlsFileIterator const &Rls, char const * const Component, char const * const SrcName, char const * const SrcVersion) { return URI(URITemplate(Rls), Component, SrcName, SrcVersion); } std::string pkgAcqChangelog::URI(std::string const &Template, char const * const Component, char const * const SrcName, char const * const SrcVersion) { if (Template.find("@CHANGEPATH@") == std::string::npos) return ""; // the path is: COMPONENT/SRC/SRCNAME/SRCNAME_SRCVER, e.g. main/a/apt/1.1 or contrib/liba/libapt/2.0 std::string Src = SrcName; std::string path = APT::String::Startswith(SrcName, "lib") ? Src.substr(0, 4) : Src.substr(0,1); path.append("/").append(Src).append("/"); path.append(Src).append("_").append(StripEpoch(SrcVersion)); // we omit component for releases without one (= flat-style repositories) if (Component != NULL && strlen(Component) != 0) path = std::string(Component) + "/" + path; return SubstVar(Template, "@CHANGEPATH@", path); } /*}}}*/ // AcqChangelog::Failed - Failure handler /*{{{*/ void pkgAcqChangelog::Failed(string const &Message, pkgAcquire::MethodConfig const * const Cnf) { Item::Failed(Message,Cnf); std::string errText; // TRANSLATOR: %s=%s is sourcename=sourceversion, e.g. apt=1.1 strprintf(errText, _("Changelog unavailable for %s=%s"), SrcName.c_str(), SrcVersion.c_str()); // Error is probably something techy like 404 Not Found if (ErrorText.empty()) ErrorText = errText; else ErrorText = errText + " (" + ErrorText + ")"; } /*}}}*/ // AcqChangelog::Done - Item downloaded OK /*{{{*/ void pkgAcqChangelog::Done(string const &Message,HashStringList const &CalcHashes, pkgAcquire::MethodConfig const * const Cnf) { Item::Done(Message,CalcHashes,Cnf); if (d->FinalFile.empty() == false) { if (RemoveFile("pkgAcqChangelog::Done", d->FinalFile) == false || Rename(DestFile, d->FinalFile) == false) Status = StatError; } Complete = true; } /*}}}*/ pkgAcqChangelog::~pkgAcqChangelog() /*{{{*/ { if (TemporaryDirectory.empty() == false) { RemoveFile("~pkgAcqChangelog", DestFile); rmdir(TemporaryDirectory.c_str()); } delete d; } /*}}}*/ // AcqFile::pkgAcqFile - Constructor /*{{{*/ pkgAcqFile::pkgAcqFile(pkgAcquire * const Owner,string const &URI, HashStringList const &Hashes, unsigned long long const Size,string const &Dsc,string const &ShortDesc, const string &DestDir, const string &DestFilename, bool const IsIndexFile) : Item(Owner), d(NULL), IsIndexFile(IsIndexFile), ExpectedHashes(Hashes) { Retries = _config->FindI("Acquire::Retries",0); if(!DestFilename.empty()) DestFile = DestFilename; else if(!DestDir.empty()) DestFile = DestDir + "/" + flNotDir(URI); else DestFile = flNotDir(URI); // Create the item Desc.URI = URI; Desc.Description = Dsc; Desc.Owner = this; // Set the short description to the archive component Desc.ShortDesc = ShortDesc; // Get the transfer sizes FileSize = Size; struct stat Buf; if (stat(DestFile.c_str(),&Buf) == 0) { // Hmm, the partial file is too big, erase it if ((Size > 0) && (unsigned long long)Buf.st_size > Size) RemoveFile("pkgAcqFile", DestFile); else PartialSize = Buf.st_size; } QueueURI(Desc); } /*}}}*/ // AcqFile::Done - Item downloaded OK /*{{{*/ void pkgAcqFile::Done(string const &Message,HashStringList const &CalcHashes, pkgAcquire::MethodConfig const * const Cnf) { Item::Done(Message,CalcHashes,Cnf); std::string const FileName = LookupTag(Message,"Filename"); Complete = true; // The files timestamp matches if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) return; // We have to copy it into place if (RealFileExists(DestFile.c_str()) == false) { Local = true; if (_config->FindB("Acquire::Source-Symlinks",true) == false || Cnf->Removable == true) { Desc.URI = "copy:" + FileName; QueueURI(Desc); return; } // Erase the file if it is a symlink so we can overwrite it struct stat St; if (lstat(DestFile.c_str(),&St) == 0) { if (S_ISLNK(St.st_mode) != 0) RemoveFile("pkgAcqFile::Done", DestFile); } // Symlink the file if (symlink(FileName.c_str(),DestFile.c_str()) != 0) { _error->PushToStack(); _error->Errno("pkgAcqFile::Done", "Symlinking file %s failed", DestFile.c_str()); std::stringstream msg; _error->DumpErrors(msg, GlobalError::DEBUG, false); _error->RevertToStack(); ErrorText = msg.str(); Status = StatError; Complete = false; } } } /*}}}*/ // AcqFile::Failed - Failure handler /*{{{*/ // --------------------------------------------------------------------- /* Here we try other sources */ void pkgAcqFile::Failed(string const &Message, pkgAcquire::MethodConfig const * const Cnf) { Item::Failed(Message,Cnf); // This is the retry counter if (Retries != 0 && Cnf->LocalOnly == false && StringToBool(LookupTag(Message,"Transient-Failure"),false) == true) { --Retries; QueueURI(Desc); Status = StatIdle; return; } } /*}}}*/ string pkgAcqFile::Custom600Headers() const /*{{{*/ { if (IsIndexFile) return "\nIndex-File: true"; return ""; } /*}}}*/ pkgAcqFile::~pkgAcqFile() {}