// -*- 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 /*}}}*/ using namespace std; static void printHashSumComparision(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 GetCompressedFileName(std::string const &URI, std::string const &Name, std::string const &Ext) /*{{{*/ { if (Ext.empty() || Ext == "uncompressed") return Name; // do not reverify cdrom sources as apt-cdrom may rewrite the Packages // file when its doing the indexcopy if (URI.substr(0,6) == "cdrom:") return Name; // adjust DestFile if its compressed on disk if (_config->FindB("Acquire::GzipIndexes",false) == true) return Name + '.' + Ext; return Name; } /*}}}*/ static bool AllowInsecureRepositories(indexRecords const * const MetaIndexParser, pkgAcqMetaBase * const TransactionManager, pkgAcquire::Item * const I) /*{{{*/ { if(MetaIndexParser->IsAlwaysTrusted() || _config->FindB("Acquire::AllowInsecureRepositories") == true) return true; _error->Error(_("Use --allow-insecure-repositories to force the update")); TransactionManager->AbortTransaction(); I->Status = pkgAcquire::Item::StatError; return false; } /*}}}*/ // 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 */ return TransactionManager->MetaIndexParser != NULL; } 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 { /* FIXME: We have only hashes for uncompressed pdiffs. rred uncompresses them on the fly while parsing. In StateFetchDiff state we also uncompress on the fly for hash check. Hashes are checked while searching for (next) patch to apply. */ return false; } HashStringList pkgAcqIndexDiffs::GetExpectedHashes() const { 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 */ return State == StateApplyDiff; } HashStringList pkgAcqIndexMergeDiffs::GetExpectedHashes() const { 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) { std::string const FinalFile = GetFinalFilename(); if (TransactionManager != NULL && TransactionManager->IMSHit == true && FileExists(FinalFile) == true) { PartialFile = DestFile = FinalFile; Status = StatDone; return false; } 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 { return GetFinalFileNameFromURI(Desc.URI); } std::string pkgAcqDiffIndex::GetFinalFilename() const { // the logic we inherent from pkgAcqBaseIndex isn't what we need here return pkgAcquire::Item::GetFinalFilename(); } std::string pkgAcqIndex::GetFinalFilename() const { std::string const FinalFile = GetFinalFileNameFromURI(Target->URI); return GetCompressedFileName(Target->URI, FinalFile, CurrentCompressionExtension); } 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(DataTarget.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 Target->MetaKey + ".diff/Index"; } /*}}}*/ //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 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 != "") { if(Debug == true) std::clog << "mv " << PartialFile << " -> "<< DestFile << " # " << DescURI() << std::endl; Rename(PartialFile, DestFile); } else { if(Debug == true) std::clog << "rm " << DestFile << " # " << DescURI() << std::endl; unlink(DestFile.c_str()); } 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 TransactionAbort: if (Stage == STAGE_DECOMPRESS_AND_VERIFY) { // keep the compressed file, but drop the decompressed EraseFileName.clear(); if (PartialFile.empty() == false && flExtension(PartialFile) == "decomp") unlink(PartialFile.c_str()); } break; case TransactionCommit: if (EraseFileName.empty() == false) unlink(EraseFileName.c_str()); break; } return true; } bool pkgAcqDiffIndex::TransactionState(TransactionStates const state) { if (pkgAcqTransactionItem::TransactionState(state) == false) return false; switch (state) { case TransactionCommit: break; case TransactionAbort: std::string const Partial = GetPartialFileNameFromURI(Target->URI); unlink(Partial.c_str()); break; } return true; } /*}}}*/ // Acquire::Item::Item - Constructor /*{{{*/ APT_IGNORE_DEPRECATED_PUSH pkgAcquire::Item::Item(pkgAcquire * const Owner) : FileSize(0), PartialSize(0), Mode(0), Complete(false), Local(false), QueueCounter(0), ExpectedAdditionalItems(0), Owner(Owner) { Owner->Add(this); Status = StatIdle; } APT_IGNORE_DEPRECATED_POP /*}}}*/ // Acquire::Item::~Item - Destructor /*{{{*/ pkgAcquire::Item::~Item() { Owner->Remove(this); } /*}}}*/ 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 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(ErrorText.empty()) ErrorText = LookupTag(Message,"Message"); UsedMirror = LookupTag(Message,"UsedMirror"); 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"); if (FailReason == "MaximumSizeExceeded") RenameOnError(MaximumSizeExceeded); else if (Status == StatAuthError) RenameOnError(HashSumMismatch); // report mirror failure back to LP if we actually use a mirror if (FailReason.empty() == false) ReportMirrorFailure(FailReason); else ReportMirrorFailure(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::Done - Item downloaded OK /*{{{*/ void pkgAcquire::Item::Done(string const &Message, HashStringList const &Hashes, pkgAcquire::MethodConfig const * const /*Cnf*/) { // We just downloaded something.. string FileName = LookupTag(Message,"Filename"); UsedMirror = LookupTag(Message,"UsedMirror"); unsigned long long const downloadedSize = Hashes.FileSize(); if (downloadedSize != 0) { if (Complete == false && !Local && FileName == DestFile) { if (Owner->Log != 0) Owner->Log->Fetched(Hashes.FileSize(),atoi(LookupTag(Message,"Resume-Point","0").c_str())); } if (FileSize == 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"); Status = StatAuthError; ReportMirrorFailure("HashChecksumFailure"); break; case SizeMismatch: errtext = _("Size mismatch"); Status = StatAuthError; ReportMirrorFailure("SizeFailure"); 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: errtext = _("Does not start with a cleartext signature"); Status = StatError; break; case MaximumSizeExceeded: // the method is expected to report a good error for this Status = StatError; 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(string const &FailCode) { // we only act if a mirror was used at all if(UsedMirror.empty()) return; #if 0 std::cerr << "\nReportMirrorFailure: " << UsedMirror << " Uri: " << DescURI() << " FailCode: " << FailCode << std::endl; #endif string report = _config->Find("Methods::Mirror::ProblemReporting", "/usr/lib/apt/apt-report-mirror-failure"); if(!FileExists(report)) return; std::vector Args; Args.push_back(report.c_str()); Args.push_back(UsedMirror.c_str()); Args.push_back(DescURI().c_str()); Args.push_back(FailCode.c_str()); Args.push_back(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'", _config->Find("Methods::Mirror::ProblemReporting").c_str()); } } /*}}}*/ std::string pkgAcquire::Item::HashSum() const /*{{{*/ { HashStringList const hashes = GetExpectedHashes(); HashString const * const hs = hashes.find(NULL); return hs != NULL ? hs->toStr() : ""; } /*}}}*/ pkgAcqTransactionItem::pkgAcqTransactionItem(pkgAcquire * const Owner, /*{{{*/ pkgAcqMetaBase * const TransactionManager, IndexTarget const * const Target) : pkgAcquire::Item(Owner), Target(Target), TransactionManager(TransactionManager) { if (TransactionManager != this) TransactionManager->Add(this); } /*}}}*/ pkgAcqTransactionItem::~pkgAcqTransactionItem() /*{{{*/ { } /*}}}*/ HashStringList pkgAcqTransactionItem::GetExpectedHashesFor(std::string const MetaKey) const /*{{{*/ { if (TransactionManager->MetaIndexParser == NULL) return HashStringList(); indexRecords::checkSum * const R = TransactionManager->MetaIndexParser->Lookup(MetaKey); if (R == NULL) return HashStringList(); return R->Hashes; } /*}}}*/ // AcqMetaBase - Constructor /*{{{*/ pkgAcqMetaBase::pkgAcqMetaBase(pkgAcquire * const Owner, pkgAcqMetaBase * const TransactionManager, std::vector const * const IndexTargets, IndexTarget const &DataTarget, indexRecords * const MetaIndexParser) : pkgAcqTransactionItem(Owner, TransactionManager, NULL), DataTarget(DataTarget), MetaIndexParser(MetaIndexParser), LastMetaIndexParser(NULL), IndexTargets(IndexTargets), AuthPass(false), IMSHit(false) { } /*}}}*/ // 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; // ensure the toplevel is in error state too for (std::vector::iterator I = Transaction.begin(); I != Transaction.end(); ++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; // 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 /*{{{*/ bool pkgAcqMetaBase::CheckStopAuthentication(pkgAcquire::Item * const I, const std::string &Message) { // FIXME: this entire function can do now that we disallow going to // a unauthenticated state and can cleanly rollback string const Final = I->GetFinalFilename(); 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\n"), Desc.Description.c_str(), LookupTag(Message,"Message").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(), LookupTag(Message,"Message").c_str()); I->Status = StatError; return true; } else { _error->Warning(_("GPG error: %s: %s"), Desc.Description.c_str(), LookupTag(Message,"Message").c_str()); } // gpgv method failed ReportMirrorFailure("GPGFailure"); 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); 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) string const FileName = LookupTag(Message,"Filename"); if (FileName.empty() == true) { I->Status = StatError; I->ErrorText = "Method gave a blank filename"; return false; } if (FileName != I->DestFile) { 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; unlink(I->DestFile.c_str()); } } if(IMSHit == true) { // for simplicity, the transaction manager is always InRelease // even if it doesn't exist. if (TransactionManager != NULL) 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 (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; } if (RealFileExists(FinalInRelease) || RealFileExists(FinalRelease)) { TransactionManager->LastMetaIndexParser = new indexRecords; _error->PushToStack(); if (RealFileExists(FinalInRelease)) TransactionManager->LastMetaIndexParser->Load(FinalInRelease); else TransactionManager->LastMetaIndexParser->Load(FinalRelease); // its unlikely to happen, but if what we have is bad ignore it if (_error->PendingError()) { delete TransactionManager->LastMetaIndexParser; TransactionManager->LastMetaIndexParser = NULL; } _error->RevertToStack(); } } if (TransactionManager->MetaIndexParser->Load(DestFile) == false) { Status = StatAuthError; ErrorText = TransactionManager->MetaIndexParser->ErrorText; return false; } if (!VerifyVendor(Message)) { Status = StatAuthError; return false; } if (_config->FindB("Debug::pkgAcquire::Auth", false)) std::cerr << "Signature verification succeeded: " << DestFile << std::endl; // Download further indexes with verification QueueIndexes(true); return true; } /*}}}*/ void pkgAcqMetaBase::QueueIndexes(bool const verify) /*{{{*/ { // at this point the real Items are loaded in the fetcher ExpectedAdditionalItems = 0; vector ::const_iterator Target; for (Target = IndexTargets->begin(); Target != IndexTargets->end(); ++Target) { if (verify == true && TransactionManager->MetaIndexParser->Exists((*Target)->MetaKey) == false) { // optional target that we do not have in the Release file are skipped if ((*Target)->IsOptional()) continue; 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; } /* Queue the Index file (Packages, Sources, Translation-$foo (either diff or full packages files, depending on the users option) - we also check if the PDiff Index file is listed in the Meta-Index file. Ideal would be if pkgAcqDiffIndex would test this instead, but passing the required info to it is to much hassle */ if(_config->FindB("Acquire::PDiffs",true) == true && (verify == false || TransactionManager->MetaIndexParser->Exists((*Target)->MetaKey + ".diff/Index") == true)) new pkgAcqDiffIndex(Owner, TransactionManager, *Target); else new pkgAcqIndex(Owner, TransactionManager, *Target); } } /*}}}*/ bool pkgAcqMetaBase::VerifyVendor(string const &Message) /*{{{*/ { string::size_type pos; // check for missing sigs (that where not fatal because otherwise we had // bombed earlier) string missingkeys; string msg = _("There is no public key available for the " "following key IDs:\n"); pos = Message.find("NO_PUBKEY "); if (pos != std::string::npos) { string::size_type start = pos+strlen("NO_PUBKEY "); string Fingerprint = Message.substr(start, Message.find("\n")-start); missingkeys += (Fingerprint); } if(!missingkeys.empty()) _error->Warning("%s", (msg + missingkeys).c_str()); string Transformed = TransactionManager->MetaIndexParser->GetExpectedDist(); if (Transformed == "../project/experimental") { Transformed = "experimental"; } pos = Transformed.rfind('/'); if (pos != string::npos) { Transformed = Transformed.substr(0, pos); } if (Transformed == ".") { Transformed = ""; } if (_config->FindB("Acquire::Check-Valid-Until", true) == true && 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 - formated 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."), DataTarget.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; unlink(DestFile.c_str()); PartialFile = DestFile = GetFinalFilename(); delete TransactionManager->MetaIndexParser; TransactionManager->MetaIndexParser = TransactionManager->LastMetaIndexParser; TransactionManager->LastMetaIndexParser = NULL; } if (_config->FindB("Debug::pkgAcquire::Auth", false)) { std::cerr << "Got Codename: " << TransactionManager->MetaIndexParser->GetDist() << 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->GetDist(); // return false; if (!Transformed.empty()) { _error->Warning(_("Conflicting distribution: %s (expected %s but got %s)"), Desc.Description.c_str(), Transformed.c_str(), TransactionManager->MetaIndexParser->GetDist().c_str()); } } return true; } /*}}}*/ pkgAcqMetaClearSig::pkgAcqMetaClearSig(pkgAcquire * const Owner, /*{{{*/ IndexTarget const &ClearsignedTarget, IndexTarget const &DetachedDataTarget, IndexTarget const &DetachedSigTarget, const vector* const IndexTargets, indexRecords * const MetaIndexParser) : pkgAcqMetaIndex(Owner, this, ClearsignedTarget, DetachedSigTarget, IndexTargets, MetaIndexParser), ClearsignedTarget(ClearsignedTarget), DetachedDataTarget(DetachedDataTarget), DetachedSigTarget(DetachedSigTarget) { // index targets + (worst case:) Release/Release.gpg ExpectedAdditionalItems = IndexTargets->size() + 2; TransactionManager->Add(this); } /*}}}*/ pkgAcqMetaClearSig::~pkgAcqMetaClearSig() /*{{{*/ { } /*}}}*/ // pkgAcqMetaClearSig::Custom600Headers - Insert custom request headers /*{{{*/ string pkgAcqMetaClearSig::Custom600Headers() const { string Header = pkgAcqMetaBase::Custom600Headers(); Header += "\nFail-Ignore: true"; return Header; } /*}}}*/ // pkgAcqMetaClearSig::Done - We got a file /*{{{*/ class APT_HIDDEN DummyItem : public pkgAcquire::Item { IndexTarget const * const Target; public: virtual std::string DescURI() const {return Target->URI;}; virtual HashStringList GetExpectedHashes() const {return HashStringList();}; DummyItem(pkgAcquire * const Owner, IndexTarget const * const Target) : pkgAcquire::Item(Owner), Target(Target) { Status = StatDone; DestFile = GetFinalFileNameFromURI(Target->URI); } }; void pkgAcqMetaClearSig::Done(std::string const &Message, HashStringList const &Hashes, pkgAcquire::MethodConfig const * const Cnf) { Item::Done(Message, Hashes, Cnf); // if we expect a ClearTextSignature (InRelease), ensure that // this is what we get and if not fail to queue a // Release/Release.gpg, see #346386 if (FileExists(DestFile) && !StartsWithGPGClearTextSignature(DestFile)) { pkgAcquire::Item::Failed(Message, Cnf); RenameOnError(NotClearsigned); TransactionManager->AbortTransaction(); return; } 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 DummyItem(Owner, &DetachedDataTarget); new DummyItem(Owner, &DetachedSigTarget); } } } /*}}}*/ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf) /*{{{*/ { Item::Failed(Message, Cnf); // we failed, we will not get additional items from this method ExpectedAdditionalItems = 0; if (AuthPass == false) { // 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, IndexTargets, TransactionManager->MetaIndexParser); } else { if(CheckStopAuthentication(this, Message)) return; _error->Warning(_("The data from '%s' is not signed. Packages " "from that repository can not be authenticated."), ClearsignedTarget.Description.c_str()); // No Release file was present, or verification failed, so fall // back to queueing Packages files without verification // only allow going further if the users explicitely wants it if(AllowInsecureRepositories(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); if (RealFileExists(FinalReleasegpg) || RealFileExists(FinalInRelease)) { // open the last Release if we have it if (TransactionManager->IMSHit == false) { TransactionManager->LastMetaIndexParser = new indexRecords; _error->PushToStack(); if (RealFileExists(FinalInRelease)) TransactionManager->LastMetaIndexParser->Load(FinalInRelease); else TransactionManager->LastMetaIndexParser->Load(FinalRelease); // its unlikely to happen, but if what we have is bad ignore it if (_error->PendingError()) { delete TransactionManager->LastMetaIndexParser; TransactionManager->LastMetaIndexParser = NULL; } _error->RevertToStack(); } } // we parse the indexes here because at this point the user wanted // a repository that may potentially harm him if (TransactionManager->MetaIndexParser->Load(PartialRelease) == false || VerifyVendor(Message) == false) /* expired Release files are still a problem you need extra force for */; else QueueIndexes(true); } } } /*}}}*/ pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire * const Owner, /*{{{*/ pkgAcqMetaBase * const TransactionManager, IndexTarget const &DataTarget, IndexTarget const &DetachedSigTarget, vector const * const IndexTargets, indexRecords * const MetaIndexParser) : pkgAcqMetaBase(Owner, TransactionManager, IndexTargets, DataTarget, MetaIndexParser), 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; // we expect more item ExpectedAdditionalItems = IndexTargets->size(); 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; _error->Warning(_("The repository '%s' does not have a Release file. " "This is deprecated, please contact the owner of the " "repository."), DataTarget.Description.c_str()); // No Release file was present so fall // back to queueing Packages files without verification // only allow going further if the users explicitely wants it if(AllowInsecureRepositories(TransactionManager->MetaIndexParser, TransactionManager, this) == true) { // ensure old Release files are removed TransactionManager->TransactionStageRemoval(this, GetFinalFilename()); delete TransactionManager->MetaIndexParser; TransactionManager->MetaIndexParser = NULL; // queue without any kind of hashsum support QueueIndexes(false); } } /*}}}*/ void pkgAcqMetaIndex::Finished() /*{{{*/ { if(_config->FindB("Debug::Acquire::Transaction", false) == true) std::clog << "Finished: " << DestFile <TransactionHasError() == false) TransactionManager->CommitTransaction(); } /*}}}*/ std::string pkgAcqMetaIndex::DescURI() const /*{{{*/ { return DataTarget.URI; } /*}}}*/ // AcqMetaSig::AcqMetaSig - Constructor /*{{{*/ pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire * const Owner, pkgAcqMetaBase * const TransactionManager, IndexTarget const * const Target, pkgAcqMetaIndex * const MetaIndex) : pkgAcqTransactionItem(Owner, TransactionManager, Target), 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 unlink(DestFile.c_str()); // 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() /*{{{*/ { } /*}}}*/ // 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()); } } } /*}}}*/ 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; string const FinalRelease = MetaIndex->GetFinalFilename(); string const FinalReleasegpg = GetFinalFilename(); string const FinalInRelease = TransactionManager->GetFinalFilename(); if (RealFileExists(FinalReleasegpg) || RealFileExists(FinalInRelease)) { std::string downgrade_msg; strprintf(downgrade_msg, _("The repository '%s' is no longer signed."), MetaIndex->DataTarget.Description.c_str()); if(_config->FindB("Acquire::AllowDowngradeToInsecureRepositories")) { // meh, the users wants to take risks (we still mark the packages // from this repository as unauthenticated) _error->Warning("%s", downgrade_msg.c_str()); _error->Warning(_("This is normally not allowed, but the option " "Acquire::AllowDowngradeToInsecureRepositories was " "given to override it.")); Status = StatDone; } else { _error->Error("%s", downgrade_msg.c_str()); if (TransactionManager->IMSHit == false) Rename(MetaIndex->DestFile, MetaIndex->DestFile + ".FAILED"); Item::Failed("Message: " + downgrade_msg, Cnf); TransactionManager->AbortTransaction(); return; } } else _error->Warning(_("The data from '%s' is not signed. Packages " "from that repository can not be authenticated."), MetaIndex->DataTarget.Description.c_str()); // ensures that a Release.gpg file in the lists/ is removed by the transaction TransactionManager->TransactionStageRemoval(this, DestFile); // only allow going further if the users explicitely wants it if(AllowInsecureRepositories(TransactionManager->MetaIndexParser, TransactionManager, this) == true) { if (RealFileExists(FinalReleasegpg) || RealFileExists(FinalInRelease)) { // open the last Release if we have it if (TransactionManager->IMSHit == false) { TransactionManager->LastMetaIndexParser = new indexRecords; _error->PushToStack(); if (RealFileExists(FinalInRelease)) TransactionManager->LastMetaIndexParser->Load(FinalInRelease); else TransactionManager->LastMetaIndexParser->Load(FinalRelease); // its unlikely to happen, but if what we have is bad ignore it if (_error->PendingError()) { delete TransactionManager->LastMetaIndexParser; TransactionManager->LastMetaIndexParser = NULL; } _error->RevertToStack(); } } // we parse the indexes here because at this point the user wanted // a repository that may potentially harm him if (TransactionManager->MetaIndexParser->Load(MetaIndex->DestFile) == false || MetaIndex->VerifyVendor(Message) == false) /* expired Release files are still a problem you need extra force for */; else MetaIndex->QueueIndexes(true); TransactionManager->TransactionStageCopy(MetaIndex, MetaIndex->DestFile, MetaIndex->GetFinalFilename()); } // 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, pkgAcqMetaBase * const TransactionManager, IndexTarget const * const Target) : pkgAcqTransactionItem(Owner, TransactionManager, Target) { } /*}}}*/ // 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, pkgAcqMetaBase * const TransactionManager, IndexTarget const * const Target) : pkgAcqBaseIndex(Owner, TransactionManager, Target) { Debug = _config->FindB("Debug::pkgAcquire::Diffs",false); Desc.Owner = this; Desc.Description = Target->Description + ".diff/Index"; Desc.ShortDesc = Target->ShortDesc; Desc.URI = Target->URI + ".diff/Index"; DestFile = GetPartialFileNameFromURI(Desc.URI); if(Debug) std::clog << "pkgAcqDiffIndex: " << Desc.URI << std::endl; // look for the current package file CurrentPackagesFile = GetFinalFileNameFromURI(Target->URI); // FIXME: this file:/ check is a hack to prevent fetching // from local sources. this is really silly, and // should be fixed cleanly as soon as possible if(!FileExists(CurrentPackagesFile) || Desc.URI.substr(0,strlen("file:/")) == "file:/") { // we don't have a pkg file or we don't want to queue Failed("No index file, local or canceld by user", NULL); return; } if(Debug) std::clog << "pkgAcqDiffIndex::pkgAcqDiffIndex(): " << CurrentPackagesFile << std::endl; QueueURI(Desc); } /*}}}*/ // AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- /* The only header we use is the last-modified header. */ string pkgAcqDiffIndex::Custom600Headers() const { 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); } /*}}}*/ 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); } /*}}}*/ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/ { // 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 (_error->PendingError() == true) return false; pkgTagSection Tags; if(unlikely(TF.Step(Tags) == false)) return false; HashStringList ServerHashes; unsigned long long ServerSize = 0; 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 >> 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; } 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; printHashSumComparision(CurrentPackagesFile, ServerHashes, TargetFileHashes); } return false; } if (ServerHashes.VerifyFile(CurrentPackagesFile) == true) { // 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; } FileFd fd(CurrentPackagesFile, FileFd::ReadOnly); Hashes LocalHashesCalc; LocalHashesCalc.AddFD(fd); HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList(); if(Debug) std::clog << "Server-Current: " << ServerHashes.find(NULL)->toStr() << " and we start at " << fd.Name() << " " << fd.FileSize() << " " << LocalHashes.find(NULL)->toStr() << std::endl; // parse all of (provided) history vector available_patches; bool firstAcceptedHashes = true; for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++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); 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 || unlikely(cur->result_size != size)) 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_size = size; next.patch_size = 0; 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 (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++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); 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 (unlikely(cur->patch_size != 0 && cur->patch_size != size)) continue; cur->patch_hashes.push_back(HashString(*type, hash)); cur->patch_size = size; 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; } } 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; } // 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 // note that all sizes are uncompressed, while we download compressed files unsigned long long patchesSize = 0; for (std::vector::const_iterator cur = available_patches.begin(); cur != available_patches.end(); ++cur) patchesSize += cur->patch_size; unsigned long long const sizeLimit = ServerSize * _config->FindI("Acquire::PDiffs::SizeLimit", 100); if (sizeLimit > 0 && (sizeLimit/100) < patchesSize) { if (Debug) std::clog << "Need " << patchesSize << " bytes (Limit is " << sizeLimit/100 << ") 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"); } if (pdiff_merge == false) new pkgAcqIndexDiffs(Owner, TransactionManager, Target, available_patches); else { std::vector *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)/*{{{*/ { Item::Failed(Message,Cnf); Status = StatDone; 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; } /*}}}*/ // 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, pkgAcqMetaBase * const TransactionManager, IndexTarget const * const Target, vector const &diffs) : pkgAcqBaseIndex(Owner, TransactionManager, Target), available_patches(diffs) { DestFile = GetPartialFileNameFromURI(Target->URI); 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 = GetFinalFileNameFromURI(Target->URI); Finish(true); } else { // patching needs to be bootstrapped with the 'old' version std::string const PartialFile = GetPartialFileNameFromURI(Target->URI); if (RealFileExists(PartialFile) == false) { if (symlink(GetFinalFilename().c_str(), PartialFile.c_str()) != 0) { Failed("Link creation of " + PartialFile + " to " + GetFinalFilename() + " failed", NULL); return; } } // get the next diff State = StateFetchDiff; QueueNextDiff(); } } /*}}}*/ void pkgAcqIndexDiffs::Failed(string const &Message,pkgAcquire::MethodConfig const * const Cnf)/*{{{*/ { Item::Failed(Message,Cnf); Status = StatDone; if(Debug) std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << " with " << Message << std::endl << "Falling back to normal index file acquire" << std::endl; DestFile = GetPartialFileNameFromURI(Target->URI); RenameOnError(PDiffError); 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) { TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename()); // this is for the "real" finish Complete = true; Status = StatDone; Dequeue(); if(Debug) std::clog << "\n\nallDone: " << DestFile << "\n" << std::endl; return; } 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 FinalFile = GetPartialFileNameFromURI(Target->URI); if(!FileExists(FinalFile)) { Failed("Message: No FinalFile " + FinalFile + " available", NULL); return false; } FileFd fd(FinalFile, FileFd::ReadOnly); Hashes LocalHashesCalc; LocalHashesCalc.AddFD(fd); HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList(); if(Debug) std::clog << "QueueNextDiff: " << FinalFile << " (" << 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", 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 for(vector::iterator I = available_patches.begin(); available_patches.empty() == false && I != available_patches.end() && I->result_hashes != LocalHashes; ++I) { available_patches.erase(I); } // error checking and falling back if no patch was found if(available_patches.empty() == true) { Failed("No patches left to reach target", 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 = GetPartialFileNameFromURI(Target->URI + ".diff/" + available_patches[0].file); 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); // FIXME: verify this download too before feeding it to rred std::string const FinalFile = GetPartialFileNameFromURI(Target->URI); // success in downloading a diff, enter ApplyDiff state if(State == StateFetchDiff) { FileFd fd(DestFile, FileFd::ReadOnly, FileFd::Gzip); class Hashes LocalHashesCalc; LocalHashesCalc.AddFD(fd); HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList(); if (fd.Size() != available_patches[0].patch_size || available_patches[0].patch_hashes != LocalHashes) { // patchfiles are dated, so bad indicates a bad download, so kill it unlink(DestFile.c_str()); Failed("Patch has Size/Hashsum mismatch", NULL); return; } // rred excepts the patch as $FinalFile.ed Rename(DestFile,FinalFile+".ed"); if(Debug) std::clog << "Sending to rred method: " << FinalFile << std::endl; State = StateApplyDiff; Local = true; Desc.URI = "rred:" + FinalFile; QueueURI(Desc); SetActiveSubprocess("rred"); return; } // success in download/apply a diff, queue next (if needed) if(State == StateApplyDiff) { // remove the just applied patch available_patches.erase(available_patches.begin()); unlink((FinalFile + ".ed").c_str()); // move into place if(Debug) { std::clog << "Moving patched file in place: " << std::endl << DestFile << " -> " << FinalFile << std::endl; } Rename(DestFile,FinalFile); chmod(FinalFile.c_str(),0644); // see if there is more to download if(available_patches.empty() == false) { new pkgAcqIndexDiffs(Owner, TransactionManager, Target, available_patches); return Finish(); } else // update DestFile = FinalFile; return Finish(true); } } /*}}}*/ // AcqIndexMergeDiffs::AcqIndexMergeDiffs - Constructor /*{{{*/ pkgAcqIndexMergeDiffs::pkgAcqIndexMergeDiffs(pkgAcquire * const Owner, pkgAcqMetaBase * const TransactionManager, IndexTarget const * const Target, DiffInfo const &patch, std::vector const * const allPatches) : pkgAcqBaseIndex(Owner, TransactionManager, Target), 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 + string(".pdiff"); DestFile = GetPartialFileNameFromURI(Target->URI + ".diff/" + patch.file); 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; Item::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) return; // first failure means we should fallback State = StateErrorDiff; if (Debug) std::clog << "Falling back to normal index file acquire" << std::endl; DestFile = GetPartialFileNameFromURI(Target->URI); RenameOnError(PDiffError); 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); // FIXME: verify download before feeding it to rred string const FinalFile = GetPartialFileNameFromURI(Target->URI); if (State == StateFetchDiff) { FileFd fd(DestFile, FileFd::ReadOnly, FileFd::Gzip); class Hashes LocalHashesCalc; LocalHashesCalc.AddFD(fd); HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList(); if (fd.Size() != patch.patch_size || patch.patch_hashes != LocalHashes) { // patchfiles are dated, so bad indicates a bad download, so kill it unlink(DestFile.c_str()); Failed("Patch has Size/Hashsum mismatch", NULL); return; } // rred expects the patch as $FinalFile.ed.$patchname.gz Rename(DestFile, FinalFile + ".ed." + patch.file + ".gz"); // 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 State = StateApplyDiff; // patching needs to be bootstrapped with the 'old' version if (symlink(GetFinalFilename().c_str(), FinalFile.c_str()) != 0) { Failed("Link creation of " + FinalFile + " to " + GetFinalFilename() + " failed", NULL); return; } if(Debug) std::clog << "Sending to rred method: " << FinalFile << std::endl; Local = true; Desc.URI = "rred:" + FinalFile; QueueURI(Desc); SetActiveSubprocess("rred"); return; } // success in download/apply all diffs, clean up else if (State == StateApplyDiff) { // move the result into place std::string const Final = GetFinalFilename(); if(Debug) std::clog << "Queue patched file in place: " << std::endl << DestFile << " -> " << Final << std::endl; // queue for copy by the transaction manager TransactionManager->TransactionStageCopy(this, DestFile, Final); // ensure the ed's are gone regardless of list-cleanup for (std::vector::const_iterator I = allPatches->begin(); I != allPatches->end(); ++I) { std::string const PartialFile = GetPartialFileNameFromURI(Target->URI); std::string patch = PartialFile + ".ed." + (*I)->patch.file + ".gz"; unlink(patch.c_str()); } unlink(FinalFile.c_str()); // all set and done Complete = true; if(Debug) std::clog << "allDone: " << DestFile << "\n" << std::endl; } } /*}}}*/ // AcqIndex::AcqIndex - Constructor /*{{{*/ pkgAcqIndex::pkgAcqIndex(pkgAcquire * const Owner, pkgAcqMetaBase * const TransactionManager, IndexTarget const * const Target) : pkgAcqBaseIndex(Owner, TransactionManager, Target) { // autoselect the compression method AutoSelectCompression(); 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::AutoSelectCompression - Select compression /*{{{*/ void pkgAcqIndex::AutoSelectCompression() { std::vector types = APT::Configuration::getCompressionTypes(); CompressionExtensions = ""; if (TransactionManager->MetaIndexParser != NULL && TransactionManager->MetaIndexParser->Exists(Target->MetaKey)) { for (std::vector::const_iterator t = types.begin(); t != types.end(); ++t) { std::string CompressedMetaKey = string(Target->MetaKey).append(".").append(*t); if (*t == "uncompressed" || TransactionManager->MetaIndexParser->Exists(CompressedMetaKey) == true) CompressionExtensions.append(*t).append(" "); } } else { for (std::vector::const_iterator t = types.begin(); t != types.end(); ++t) CompressionExtensions.append(*t).append(" "); } if (CompressionExtensions.empty() == false) CompressionExtensions.erase(CompressionExtensions.end()-1); } /*}}}*/ // AcqIndex::Init - defered Constructor /*{{{*/ void pkgAcqIndex::Init(string const &URI, string const &URIDesc, string const &ShortDesc) { Stage = STAGE_DOWNLOAD; DestFile = GetPartialFileNameFromURI(URI); size_t const nextExt = CompressionExtensions.find(' '); if (nextExt == std::string::npos) { CurrentCompressionExtension = CompressionExtensions; CompressionExtensions.clear(); } else { CurrentCompressionExtension = CompressionExtensions.substr(0, nextExt); CompressionExtensions = CompressionExtensions.substr(nextExt+1); } if (CurrentCompressionExtension == "uncompressed") { Desc.URI = URI; } else if (unlikely(CurrentCompressionExtension.empty())) return; else { Desc.URI = URI + '.' + CurrentCompressionExtension; DestFile = DestFile + '.' + CurrentCompressionExtension; } if(TransactionManager->MetaIndexParser != NULL) InitByHashIfNeeded(); Desc.Description = URIDesc; Desc.Owner = this; Desc.ShortDesc = ShortDesc; QueueURI(Desc); } /*}}}*/ // AcqIndex::AdjustForByHash - modify URI for by-hash support /*{{{*/ void pkgAcqIndex::InitByHashIfNeeded() { // TODO: // - (maybe?) add support for by-hash into the sources.list as flag // - make apt-ftparchive generate the hashes (and expire?) std::string HostKnob = "APT::Acquire::" + ::URI(Desc.URI).Host + "::By-Hash"; if(_config->FindB("APT::Acquire::By-Hash", false) == true || _config->FindB(HostKnob, false) == true || TransactionManager->MetaIndexParser->GetSupportsAcquireByHash()) { HashStringList const Hashes = GetExpectedHashes(); if(Hashes.usable()) { // FIXME: should we really use the best hash here? or a fixed one? HashString const * const TargetHash = Hashes.find(""); std::string const ByHash = "/by-hash/" + TargetHash->HashType() + "/" + TargetHash->HashValue(); size_t const trailing_slash = Desc.URI.find_last_of("/"); Desc.URI = Desc.URI.replace( trailing_slash, Desc.URI.substr(trailing_slash+1).size()+1, ByHash); } else { _error->Warning( "Fetching ByHash requested but can not find record for %s", GetMetaKey().c_str()); } } } /*}}}*/ // AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- /* The only header we use is the last-modified header. */ string pkgAcqIndex::Custom600Headers() const { string Final = GetFinalFilename(); string msg = "\nIndex-File: true"; struct stat Buf; if (stat(Final.c_str(),&Buf) == 0) msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime); 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) { Item::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::ReverifyAfterIMS - Reverify index after an ims-hit /*{{{*/ void pkgAcqIndex::ReverifyAfterIMS() { // update destfile to *not* include the compression extension when doing // a reverify (as its uncompressed on disk already) DestFile = GetCompressedFileName(Target->URI, GetPartialFileNameFromURI(Target->URI), CurrentCompressionExtension); // copy FinalFile into partial/ so that we check the hash again string FinalFile = GetFinalFilename(); Stage = STAGE_DECOMPRESS_AND_VERIFY; Desc.URI = "copy:" + FinalFile; QueueURI(Desc); } /*}}}*/ // AcqIndex::ValidateFile - Validate the content of the downloaded file /*{{{*/ bool pkgAcqIndex::ValidateFile(const std::string &FileName) { // FIXME: this can go away once we only ever download stuff that // has a valid hash and we never do GET based probing // FIXME2: this also leaks debian-isms into the code and should go therefore /* Always validate the index file for correctness (all indexes must * have a Package field) (LP: #346386) (Closes: #627642) */ FileFd fd(FileName, FileFd::ReadOnly, FileFd::Extension); // Only test for correctness if the content of the file is not empty // (empty is ok) if (fd.Size() > 0) { pkgTagSection sec; pkgTagFile tag(&fd); // all our current indexes have a field 'Package' in each section if (_error->PendingError() == true || tag.Step(sec) == false || sec.Exists("Package") == false) return false; } return true; } /*}}}*/ // 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, Hashes, Cfg); break; case STAGE_DECOMPRESS_AND_VERIFY: StageDecompressDone(Message, Hashes, Cfg); break; } } /*}}}*/ // AcqIndex::StageDownloadDone - Queue for decompress and verify /*{{{*/ void pkgAcqIndex::StageDownloadDone(string const &Message, HashStringList const &, pkgAcquire::MethodConfig const * const) { Complete = true; // Handle the unzipd case string FileName = LookupTag(Message,"Alt-Filename"); if (FileName.empty() == false) { Stage = STAGE_DECOMPRESS_AND_VERIFY; Local = true; DestFile += ".decomp"; Desc.URI = "copy:" + FileName; QueueURI(Desc); SetActiveSubprocess("copy"); return; } FileName = LookupTag(Message,"Filename"); if (FileName.empty() == true) { Status = StatError; ErrorText = "Method gave a blank filename"; } // 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 if (FileName != DestFile) Local = true; else EraseFileName = 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) { // The files timestamp matches, reverify by copy into partial/ EraseFileName = ""; ReverifyAfterIMS(); return; } // If we have compressed indexes enabled, queue for hash verification if (_config->FindB("Acquire::GzipIndexes",false)) { DestFile = GetPartialFileNameFromURI(Target->URI + '.' + CurrentCompressionExtension); EraseFileName = ""; Stage = STAGE_DECOMPRESS_AND_VERIFY; Desc.URI = "copy:" + FileName; QueueURI(Desc); SetActiveSubprocess("copy"); return; } // get the binary name for your used compression type string decompProg; if(CurrentCompressionExtension == "uncompressed") decompProg = "copy"; else decompProg = _config->Find(string("Acquire::CompressionTypes::").append(CurrentCompressionExtension),""); if(decompProg.empty() == true) { _error->Error("Unsupported extension: %s", CurrentCompressionExtension.c_str()); return; } // queue uri for the next stage Stage = STAGE_DECOMPRESS_AND_VERIFY; DestFile += ".decomp"; Desc.URI = decompProg + ":" + FileName; QueueURI(Desc); SetActiveSubprocess(decompProg); } /*}}}*/ // AcqIndex::StageDecompressDone - Final verification /*{{{*/ void pkgAcqIndex::StageDecompressDone(string const &Message, HashStringList const &, pkgAcquire::MethodConfig const * const Cfg) { if(!ValidateFile(DestFile)) { RenameOnError(InvalidFormat); Failed(Message, Cfg); return; } // Done, queue for rename on transaction finished TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename()); return; } /*}}}*/ // 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), 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()->Flags & pkgCache::Flag::NotSource) != 0) 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->Flags & pkgCache::Flag::NotSource) != 0) continue; // Try to cross match against the source list pkgIndexFile *Index; if (Sources->FindIndex(PkgF, Index) == false) continue; LocalSource = (PkgF->Flags & pkgCache::Flag::LocalSource) == 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 */ unlink(FinalFile.c_str()); } // 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.. */ unlink(FinalFile.c_str()); } 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) unlink(DestFile.c_str()); 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 string FileName = LookupTag(Message,"Filename"); if (FileName.empty() == true) { Status = StatError; ErrorText = "Method gave a blank filename"; return; } // Reference filename if (FileName != DestFile) { 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; } /*}}}*/ // 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), 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) unlink(DestFile.c_str()); 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); string FileName = LookupTag(Message,"Filename"); if (FileName.empty() == true) { Status = StatError; ErrorText = "Method gave a blank filename"; return; } Complete = true; // The files timestamp matches if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) return; // We have to copy it into place if (FileName != DestFile) { 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) unlink(DestFile.c_str()); } // 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); _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 ""; } /*}}}*/