diff options
Diffstat (limited to 'apt-pkg/acquire-item.cc')
| -rw-r--r-- | apt-pkg/acquire-item.cc | 2223 |
1 files changed, 1305 insertions, 918 deletions
diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc index 2401364a9..c63253447 100644 --- a/apt-pkg/acquire-item.cc +++ b/apt-pkg/acquire-item.cc @@ -44,22 +44,72 @@ #include <sstream> #include <stdio.h> #include <ctime> +#include <sys/types.h> +#include <pwd.h> +#include <grp.h> #include <apti18n.h> /*}}}*/ 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 void ChangeOwnerAndPermissionOfFile(char const * const requester, char const * const file, char const * const user, char const * const group, mode_t const mode) +{ + // ensure the file is owned by root and has good permissions + struct passwd const * const pw = getpwnam(user); + struct group const * const gr = getgrnam(group); + if (getuid() == 0) // if we aren't root, we can't chown, so don't try it + { + if (pw != NULL && gr != NULL && chown(file, pw->pw_uid, gr->gr_gid) != 0) + _error->WarningE(requester, "chown to %s:%s of file %s failed", user, group, file); + } + if (chmod(file, mode) != 0) + _error->WarningE(requester, "chmod 0%o of file %s failed", mode, file); +} +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)); +} + + // Acquire::Item::Item - Constructor /*{{{*/ -// --------------------------------------------------------------------- -/* */ -pkgAcquire::Item::Item(pkgAcquire *Owner) : Owner(Owner), FileSize(0), - PartialSize(0), Mode(0), ID(0), Complete(false), - Local(false), QueueCounter(0) +#if __GNUC__ >= 4 + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif +pkgAcquire::Item::Item(pkgAcquire *Owner, + HashStringList const &ExpectedHashes, + pkgAcqMetaBase *TransactionManager) + : Owner(Owner), FileSize(0), PartialSize(0), Mode(0), ID(0), Complete(false), + Local(false), QueueCounter(0), TransactionManager(TransactionManager), + ExpectedAdditionalItems(0), ExpectedHashes(ExpectedHashes) { Owner->Add(this); Status = StatIdle; + if(TransactionManager != NULL) + TransactionManager->Add(this); } +#if __GNUC__ >= 4 + #pragma GCC diagnostic pop +#endif /*}}}*/ // Acquire::Item::~Item - Destructor /*{{{*/ // --------------------------------------------------------------------- @@ -75,15 +125,15 @@ pkgAcquire::Item::~Item() fetch this object */ void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf) { - Status = StatIdle; - ErrorText = LookupTag(Message,"Message"); + if(ErrorText == "") + 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->LocalOnly == true && + if (Cnf != NULL && Cnf->LocalOnly == true && StringToBool(LookupTag(Message,"Transient-Failure"),false) == true) { Status = StatIdle; @@ -92,11 +142,18 @@ void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf) } Status = StatError; + Complete = false; Dequeue(); - } + } + else + Status = StatIdle; - // report mirror failure back to LP if we actually use a mirror + // check fail reason string FailReason = LookupTag(Message, "FailReason"); + if(FailReason == "MaximumSizeExceeded") + Rename(DestFile, DestFile+".FAILED"); + + // report mirror failure back to LP if we actually use a mirror if(FailReason.size() != 0) ReportMirrorFailure(FailReason); else @@ -117,12 +174,12 @@ void pkgAcquire::Item::Start(string /*Message*/,unsigned long long Size) // Acquire::Item::Done - Item downloaded OK /*{{{*/ // --------------------------------------------------------------------- /* */ -void pkgAcquire::Item::Done(string Message,unsigned long long Size,string /*Hash*/, +void pkgAcquire::Item::Done(string Message,unsigned long long Size,HashStringList const &/*Hash*/, pkgAcquire::MethodConfig * /*Cnf*/) { // We just downloaded something.. string FileName = LookupTag(Message,"Filename"); - UsedMirror = LookupTag(Message,"UsedMirror"); + UsedMirror = LookupTag(Message,"UsedMirror"); if (Complete == false && !Local && FileName == DestFile) { if (Owner->Log != 0) @@ -140,7 +197,7 @@ void pkgAcquire::Item::Done(string Message,unsigned long long Size,string /*Hash // --------------------------------------------------------------------- /* This helper function is used by a lot of item methods as their final step */ -void pkgAcquire::Item::Rename(string From,string To) +bool pkgAcquire::Item::Rename(string From,string To) { if (rename(From.c_str(),To.c_str()) != 0) { @@ -148,10 +205,28 @@ void pkgAcquire::Item::Rename(string From,string To) snprintf(S,sizeof(S),_("rename failed, %s (%s -> %s)."),strerror(errno), From.c_str(),To.c_str()); Status = StatError; - ErrorText = S; + ErrorText += S; + return false; } + return true; } /*}}}*/ + +void pkgAcquire::Item::QueueURI(ItemDesc &Item) +{ + if (RealFileExists(DestFile)) + { + std::string SandboxUser = _config->Find("APT::Sandbox::User"); + ChangeOwnerAndPermissionOfFile("GetPartialFileName", DestFile.c_str(), + SandboxUser.c_str(), "root", 0600); + } + Owner->Enqueue(Item); +} +void pkgAcquire::Item::Dequeue() +{ + Owner->Dequeue(this); +} + bool pkgAcquire::Item::RenameOnError(pkgAcquire::Item::RenameOnErrorState const error)/*{{{*/ { if(FileExists(DestFile)) @@ -174,10 +249,31 @@ bool pkgAcquire::Item::RenameOnError(pkgAcquire::Item::RenameOnErrorState const Status = StatError; // do not report as usually its not the mirrors fault, but Portal/Proxy break; + case SignatureError: + ErrorText = _("Signature error"); + Status = StatError; + break; + case NotClearsigned: + ErrorText = _("Does not start with a cleartext signature"); + Status = StatError; + break; } return false; } /*}}}*/ +void pkgAcquire::Item::SetActiveSubprocess(const std::string &subprocess)/*{{{*/ +{ + ActiveSubprocess = subprocess; +#if __GNUC__ >= 4 + #pragma GCC diagnostic push + #pragma GCC diagnostic ignored "-Wdeprecated-declarations" +#endif + Mode = ActiveSubprocess.c_str(); +#if __GNUC__ >= 4 + #pragma GCC diagnostic pop +#endif +} + /*}}}*/ // Acquire::Item::ReportMirrorFailure /*{{{*/ // --------------------------------------------------------------------- void pkgAcquire::Item::ReportMirrorFailure(string FailCode) @@ -222,118 +318,6 @@ void pkgAcquire::Item::ReportMirrorFailure(string FailCode) } } /*}}}*/ -// AcqSubIndex::AcqSubIndex - Constructor /*{{{*/ -// --------------------------------------------------------------------- -/* Get a sub-index file based on checksums from a 'master' file and - possibly query additional files */ -pkgAcqSubIndex::pkgAcqSubIndex(pkgAcquire *Owner, string const &URI, - string const &URIDesc, string const &ShortDesc, - HashString const &ExpectedHash) - : Item(Owner), ExpectedHash(ExpectedHash) -{ - /* XXX: Beware: Currently this class does nothing (of value) anymore ! */ - Debug = _config->FindB("Debug::pkgAcquire::SubIndex",false); - - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(URI); - - Desc.URI = URI; - Desc.Description = URIDesc; - Desc.Owner = this; - Desc.ShortDesc = ShortDesc; - - QueueURI(Desc); - - if(Debug) - std::clog << "pkgAcqSubIndex: " << Desc.URI << std::endl; -} - /*}}}*/ -// AcqSubIndex::Custom600Headers - Insert custom request headers /*{{{*/ -// --------------------------------------------------------------------- -/* The only header we use is the last-modified header. */ -string pkgAcqSubIndex::Custom600Headers() -{ - string Final = _config->FindDir("Dir::State::lists"); - Final += URItoFileName(Desc.URI); - - struct stat Buf; - if (stat(Final.c_str(),&Buf) != 0) - return "\nIndex-File: true\nFail-Ignore: true\n"; - return "\nIndex-File: true\nFail-Ignore: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime); -} - /*}}}*/ -void pkgAcqSubIndex::Failed(string Message,pkgAcquire::MethodConfig * /*Cnf*/)/*{{{*/ -{ - if(Debug) - std::clog << "pkgAcqSubIndex failed: " << Desc.URI << " with " << Message << std::endl; - - Complete = false; - Status = StatDone; - Dequeue(); - - // No good Index is provided -} - /*}}}*/ -void pkgAcqSubIndex::Done(string Message,unsigned long long Size,string Md5Hash, /*{{{*/ - pkgAcquire::MethodConfig *Cnf) -{ - if(Debug) - std::clog << "pkgAcqSubIndex::Done(): " << Desc.URI << std::endl; - - string FileName = LookupTag(Message,"Filename"); - if (FileName.empty() == true) - { - Status = StatError; - ErrorText = "Method gave a blank filename"; - return; - } - - if (FileName != DestFile) - { - Local = true; - Desc.URI = "copy:" + FileName; - QueueURI(Desc); - return; - } - - Item::Done(Message,Size,Md5Hash,Cnf); - - string FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(Desc.URI); - - /* Downloaded invalid transindex => Error (LP: #346386) (Closes: #627642) */ - indexRecords SubIndexParser; - if (FileExists(DestFile) == true && !SubIndexParser.Load(DestFile)) { - Status = StatError; - ErrorText = SubIndexParser.ErrorText; - return; - } - - // success in downloading the index - // rename the index - if(Debug) - std::clog << "Renaming: " << DestFile << " -> " << FinalFile << std::endl; - Rename(DestFile,FinalFile); - chmod(FinalFile.c_str(),0644); - DestFile = FinalFile; - - if(ParseIndex(DestFile) == false) - return Failed("", NULL); - - Complete = true; - Status = StatDone; - Dequeue(); - return; -} - /*}}}*/ -bool pkgAcqSubIndex::ParseIndex(string const &IndexFile) /*{{{*/ -{ - indexRecords SubIndexParser; - if (FileExists(IndexFile) == false || SubIndexParser.Load(IndexFile) == false) - return false; - // so something with the downloaded index - return true; -} - /*}}}*/ // AcqDiffIndex::AcqDiffIndex - Constructor /*{{{*/ // --------------------------------------------------------------------- /* Get the DiffIndex file first and see if there are patches available @@ -342,21 +326,23 @@ bool pkgAcqSubIndex::ParseIndex(string const &IndexFile) /*{{{*/ * the original packages file */ pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire *Owner, - string URI,string URIDesc,string ShortDesc, - HashString ExpectedHash) - : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash), - Description(URIDesc) + pkgAcqMetaBase *TransactionManager, + IndexTarget const * const Target, + HashStringList const &ExpectedHashes, + indexRecords *MetaIndexParser) + : pkgAcqBaseIndex(Owner, TransactionManager, Target, ExpectedHashes, + MetaIndexParser), PackagesFileReadyInPartial(false) { Debug = _config->FindB("Debug::pkgAcquire::Diffs",false); - Desc.Description = URIDesc + "/DiffIndex"; + RealURI = Target->URI; Desc.Owner = this; - Desc.ShortDesc = ShortDesc; - Desc.URI = URI + ".diff/Index"; + Desc.Description = Target->Description + ".diff/Index"; + Desc.ShortDesc = Target->ShortDesc; + Desc.URI = Target->URI + ".diff/Index"; - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(Desc.URI); + DestFile = GetPartialFileNameFromURI(Desc.URI); if(Debug) std::clog << "pkgAcqDiffIndex: " << Desc.URI << std::endl; @@ -372,9 +358,7 @@ pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire *Owner, Desc.URI.substr(0,strlen("file:/")) == "file:/") { // we don't have a pkg file or we don't want to queue - if(Debug) - std::clog << "No index file, local or canceld by user" << std::endl; - Failed("", NULL); + Failed("No index file, local or canceld by user", NULL); return; } @@ -389,11 +373,11 @@ pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire *Owner, // AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- /* The only header we use is the last-modified header. */ -string pkgAcqDiffIndex::Custom600Headers() +string pkgAcqDiffIndex::Custom600Headers() const { string Final = _config->FindDir("Dir::State::lists"); Final += URItoFileName(Desc.URI); - + if(Debug) std::clog << "Custom600Header-IMS: " << Final << std::endl; @@ -406,190 +390,333 @@ string pkgAcqDiffIndex::Custom600Headers() /*}}}*/ bool pkgAcqDiffIndex::ParseDiffIndex(string 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; - pkgTagSection Tags; - string ServerSha1; - vector<DiffInfo> available_patches; - FileFd Fd(IndexDiffFile,FileFd::ReadOnly); pkgTagFile TF(&Fd); if (_error->PendingError() == true) return false; - if(TF.Step(Tags) == true) + 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) { - bool found = false; - DiffInfo d; - string size; + std::string tagname = *type; + tagname.append("-Current"); + std::string const tmp = Tags.FindS(tagname.c_str()); + if (tmp.empty() == true) + continue; - string const tmp = Tags.FindS("SHA1-Current"); + string hash; + unsigned long long size; std::stringstream ss(tmp); - ss >> ServerSha1 >> size; - unsigned long const ServerSize = atol(size.c_str()); + ss >> hash >> size; + if (unlikely(hash.empty() == true)) + continue; + if (unlikely(ServerSize != 0 && ServerSize != size)) + continue; + ServerHashes.push_back(HashString(*type, hash)); + ServerSize = size; + } - FileFd fd(CurrentPackagesFile, FileFd::ReadOnly); - SHA1Summation SHA1; - SHA1.AddFD(fd); - string const local_sha1 = SHA1.Result(); + if (ServerHashes.usable() == false) + { + if (Debug == true) + std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": Did not find a good hashsum in the index" << std::endl; + return false; + } - if(local_sha1 == ServerSha1) + if (ServerHashes != HashSums()) + { + if (Debug == true) { - // we have the same sha1 as the server so we are done here - if(Debug) - std::clog << "Package file is up-to-date" << std::endl; - // 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, RealURI, Description, Desc.ShortDesc, - ExpectedHash, ServerSha1, available_patches); - return true; + std::clog << "pkgAcqDiffIndex: " << IndexDiffFile << ": Index has different hashes than parser, probably older, so fail pdiffing" << std::endl; + printHashSumComparision(CurrentPackagesFile, ServerHashes, HashSums()); } - else + 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; + + // 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, + ExpectedHashes, MetaIndexParser); + 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<DiffInfo> 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(Debug) - std::clog << "SHA1-Current: " << ServerSha1 << " and we start at "<< fd.Name() << " " << fd.Size() << " " << local_sha1 << std::endl; + if (unlikely(hash.empty() == true || filename.empty() == true)) + continue; - // check the historie and see what patches we need - string const history = Tags.FindS("SHA1-History"); - std::stringstream hist(history); - while(hist >> d.sha1 >> size >> d.file) + // see if we have a record for this file already + std::vector<DiffInfo>::iterator cur = available_patches.begin(); + for (; cur != available_patches.end(); ++cur) { - // read until the first match is found - // from that point on, we probably need all diffs - if(d.sha1 == local_sha1) - found=true; - else if (found == false) + if (cur->file != filename || unlikely(cur->result_size != size)) continue; - - if(Debug) - std::clog << "Need to get diff: " << d.file << std::endl; - available_patches.push_back(d); + cur->result_hashes.push_back(HashString(*type, hash)); + break; } - - if (available_patches.empty() == false) + if (cur != available_patches.end()) + continue; + if (firstAcceptedHashes == true) { - // 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; - } - - // see if the patches are too big - found = false; // it was true and it will be true again at the end - d = *available_patches.begin(); - string const firstPatch = d.file; - unsigned long patchesSize = 0; - std::stringstream patches(Tags.FindS("SHA1-Patches")); - while(patches >> d.sha1 >> size >> d.file) - { - if (firstPatch == d.file) - found = true; - else if (found == false) - continue; - - patchesSize += atol(size.c_str()); - } - unsigned 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; - } + 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); - // we have something, queue the next diff - if(found) + while (ss >> hash >> size >> filename) { - // 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 (unlikely(hash.empty() == true || filename.empty() == true)) + continue; - if (pdiff_merge == false) - new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc, - ExpectedHash, ServerSha1, available_patches); - else + // see if we have a record for this file already + std::vector<DiffInfo>::iterator cur = available_patches.begin(); + for (; cur != available_patches.end(); ++cur) { - std::vector<pkgAcqIndexMergeDiffs*> *diffs = new std::vector<pkgAcqIndexMergeDiffs*>(available_patches.size()); - for(size_t i = 0; i < available_patches.size(); ++i) - (*diffs)[i] = new pkgAcqIndexMergeDiffs(Owner, RealURI, Description, Desc.ShortDesc, ExpectedHash, - available_patches[i], diffs); + 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; } - - Complete = false; - Status = StatDone; - Dequeue(); - return true; + 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<DiffInfo>::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<DiffInfo>::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 (false && 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; + } + + // FIXME: make this use the method + PackagesFileReadyInPartial = true; + std::string const Partial = GetPartialFileNameFromURI(RealURI); + + FileFd From(CurrentPackagesFile, FileFd::ReadOnly); + FileFd To(Partial, FileFd::WriteEmpty); + if(CopyFile(From, To) == false) + return _error->Errno("CopyFile", "failed to copy"); - // Nothing found, report and return false - // Failing here is ok, if we return false later, the full - // IndexFile is queued if(Debug) - std::clog << "Can't find a patch in the index file" << std::endl; - return false; + std::cerr << "Done copying " << CurrentPackagesFile + << " -> " << Partial + << std::endl; + + // 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, ExpectedHashes, + MetaIndexParser, available_patches); + } + else + { + std::vector<pkgAcqIndexMergeDiffs*> *diffs = new std::vector<pkgAcqIndexMergeDiffs*>(available_patches.size()); + for(size_t i = 0; i < available_patches.size(); ++i) + (*diffs)[i] = new pkgAcqIndexMergeDiffs(Owner, TransactionManager, + Target, + ExpectedHashes, + MetaIndexParser, + available_patches[i], + diffs); + } + + Complete = false; + Status = StatDone; + Dequeue(); + return true; } /*}}}*/ -void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig * /*Cnf*/)/*{{{*/ +void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig * Cnf)/*{{{*/ { if(Debug) std::clog << "pkgAcqDiffIndex failed: " << Desc.URI << " with " << Message << std::endl << "Falling back to normal index file acquire" << std::endl; - new pkgAcqIndex(Owner, RealURI, Description, Desc.ShortDesc, - ExpectedHash); + new pkgAcqIndex(Owner, TransactionManager, Target, ExpectedHashes, MetaIndexParser); - Complete = false; + Item::Failed(Message,Cnf); Status = StatDone; - Dequeue(); } /*}}}*/ -void pkgAcqDiffIndex::Done(string Message,unsigned long long Size,string Md5Hash, /*{{{*/ +void pkgAcqDiffIndex::Done(string Message,unsigned long long Size,HashStringList const &Hashes, /*{{{*/ pkgAcquire::MethodConfig *Cnf) { if(Debug) std::clog << "pkgAcqDiffIndex::Done(): " << Desc.URI << std::endl; - Item::Done(Message,Size,Md5Hash,Cnf); + Item::Done(Message, Size, Hashes, Cnf); + + // verify the index target + if(Target && Target->MetaKey != "" && MetaIndexParser && Hashes.usable()) + { + std::string IndexMetaKey = Target->MetaKey + ".diff/Index"; + indexRecords::checkSum *Record = MetaIndexParser->Lookup(IndexMetaKey); + if(Record && Record->Hashes.usable() && Hashes != Record->Hashes) + { + RenameOnError(HashSumMismatch); + printHashSumComparision(RealURI, Record->Hashes, Hashes); + Failed(Message, Cnf); + return; + } + + } string FinalFile; - FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI); + FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(Desc.URI); - // success in downloading the index - // rename the index - FinalFile += string(".IndexDiff"); - if(Debug) - std::clog << "Renaming: " << DestFile << " -> " << FinalFile - << std::endl; - Rename(DestFile,FinalFile); - chmod(FinalFile.c_str(),0644); - DestFile = FinalFile; + if(StringToBool(LookupTag(Message,"IMS-Hit"),false)) + DestFile = FinalFile; if(!ParseDiffIndex(DestFile)) - return Failed("", NULL); + return Failed("Message: Couldn't parse pdiff index", Cnf); + + // queue for final move + TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); Complete = true; Status = StatDone; @@ -603,26 +730,28 @@ void pkgAcqDiffIndex::Done(string Message,unsigned long long Size,string Md5Hash * for each diff and the index */ pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner, - string URI,string URIDesc,string ShortDesc, - HashString ExpectedHash, - string ServerSha1, + pkgAcqMetaBase *TransactionManager, + struct IndexTarget const * const Target, + HashStringList const &ExpectedHashes, + indexRecords *MetaIndexParser, vector<DiffInfo> diffs) - : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash), - available_patches(diffs), ServerSha1(ServerSha1) + : pkgAcqBaseIndex(Owner, TransactionManager, Target, ExpectedHashes, MetaIndexParser), + available_patches(diffs) { - - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(URI); + DestFile = GetPartialFileNameFromURI(Target->URI); Debug = _config->FindB("Debug::pkgAcquire::Diffs",false); - Description = URIDesc; + RealURI = Target->URI; Desc.Owner = this; - Desc.ShortDesc = ShortDesc; + Description = Target->Description; + Desc.ShortDesc = Target->ShortDesc; if(available_patches.empty() == true) { - // we are done (yeah!) + // we are done (yeah!), check hashes against the final file + DestFile = _config->FindDir("Dir::State::lists"); + DestFile += URItoFileName(Target->URI); Finish(true); } else @@ -638,28 +767,34 @@ void pkgAcqIndexDiffs::Failed(string Message,pkgAcquire::MethodConfig * /*Cnf*/) if(Debug) std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << " with " << Message << std::endl << "Falling back to normal index file acquire" << std::endl; - new pkgAcqIndex(Owner, RealURI, Description,Desc.ShortDesc, - ExpectedHash); + new pkgAcqIndex(Owner, TransactionManager, Target, ExpectedHashes, MetaIndexParser); 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) { - DestFile = _config->FindDir("Dir::State::lists"); - DestFile += URItoFileName(RealURI); - - if(!ExpectedHash.empty() && !ExpectedHash.VerifyFile(DestFile)) + if(HashSums().usable() && !HashSums().VerifyFile(DestFile)) { RenameOnError(HashSumMismatch); Dequeue(); return; } + // queue for copy + std::string FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(RealURI); + TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); + // this is for the "real" finish Complete = true; Status = StatDone; @@ -679,21 +814,32 @@ void pkgAcqIndexDiffs::Finish(bool allDone) /*}}}*/ bool pkgAcqIndexDiffs::QueueNextDiff() /*{{{*/ { - // calc sha1 of the just patched file - string FinalFile = _config->FindDir("Dir::State::lists"); - FinalFile += URItoFileName(RealURI); + std::string const FinalFile = GetPartialFileNameFromURI(RealURI); + + if(!FileExists(FinalFile)) + { + Failed("Message: No FinalFile " + FinalFile + " available", NULL); + return false; + } FileFd fd(FinalFile, FileFd::ReadOnly); - SHA1Summation SHA1; - SHA1.AddFD(fd); - string local_sha1 = string(SHA1.Result()); + Hashes LocalHashesCalc; + LocalHashesCalc.AddFD(fd); + HashStringList const LocalHashes = LocalHashesCalc.GetHashStringList(); + if(Debug) - std::clog << "QueueNextDiff: " - << FinalFile << " (" << local_sha1 << ")"<<std::endl; + std::clog << "QueueNextDiff: " << FinalFile << " (" << LocalHashes.find(NULL)->toStr() << ")" << std::endl; + + if (unlikely(LocalHashes.usable() == false || ExpectedHashes.usable() == false)) + { + Failed("Local/Expected hashes are not usable", NULL); + return false; + } + // final file reached before all patches are applied - if(local_sha1 == ServerSha1) + if(LocalHashes == ExpectedHashes) { Finish(true); return true; @@ -701,10 +847,10 @@ bool pkgAcqIndexDiffs::QueueNextDiff() /*{{{*/ // remove all patches until the next matching patch is found // this requires the Index file to be ordered - for(vector<DiffInfo>::iterator I=available_patches.begin(); + for(vector<DiffInfo>::iterator I = available_patches.begin(); available_patches.empty() == false && I != available_patches.end() && - I->sha1 != local_sha1; + I->result_hashes != LocalHashes; ++I) { available_patches.erase(I); @@ -713,38 +859,48 @@ bool pkgAcqIndexDiffs::QueueNextDiff() /*{{{*/ // error checking and falling back if no patch was found if(available_patches.empty() == true) { - Failed("", NULL); + Failed("No patches left to reach target", NULL); return false; } // queue the right diff Desc.URI = RealURI + ".diff/" + available_patches[0].file + ".gz"; Desc.Description = Description + " " + available_patches[0].file + string(".pdiff"); - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(RealURI + ".diff/" + available_patches[0].file); + DestFile = GetPartialFileNameFromURI(RealURI + ".diff/" + available_patches[0].file); if(Debug) std::clog << "pkgAcqIndexDiffs::QueueNextDiff(): " << Desc.URI << std::endl; - + QueueURI(Desc); return true; } /*}}}*/ -void pkgAcqIndexDiffs::Done(string Message,unsigned long long Size,string Md5Hash, /*{{{*/ +void pkgAcqIndexDiffs::Done(string Message,unsigned long long Size, HashStringList const &Hashes, /*{{{*/ pkgAcquire::MethodConfig *Cnf) { if(Debug) std::clog << "pkgAcqIndexDiffs::Done(): " << Desc.URI << std::endl; - Item::Done(Message,Size,Md5Hash,Cnf); + Item::Done(Message, Size, Hashes, Cnf); - string FinalFile; - FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI); + // FIXME: verify this download too before feeding it to rred + std::string const FinalFile = GetPartialFileNameFromURI(RealURI); // 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) + { + Failed("Patch has Size/Hashsum mismatch", NULL); + return; + } // rred excepts the patch as $FinalFile.ed Rename(DestFile,FinalFile+".ed"); @@ -756,7 +912,7 @@ void pkgAcqIndexDiffs::Done(string Message,unsigned long long Size,string Md5Has Local = true; Desc.URI = "rred:" + FinalFile; QueueURI(Desc); - Mode = "rred"; + SetActiveSubprocess("rred"); return; } @@ -779,37 +935,39 @@ void pkgAcqIndexDiffs::Done(string Message,unsigned long long Size,string Md5Has // see if there is more to download if(available_patches.empty() == false) { - new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc, - ExpectedHash, ServerSha1, available_patches); + new pkgAcqIndexDiffs(Owner, TransactionManager, Target, + ExpectedHashes, MetaIndexParser, + available_patches); return Finish(); } else + // update + DestFile = FinalFile; return Finish(true); } } /*}}}*/ // AcqIndexMergeDiffs::AcqIndexMergeDiffs - Constructor /*{{{*/ pkgAcqIndexMergeDiffs::pkgAcqIndexMergeDiffs(pkgAcquire *Owner, - string const &URI, string const &URIDesc, - string const &ShortDesc, HashString const &ExpectedHash, - DiffInfo const &patch, - std::vector<pkgAcqIndexMergeDiffs*> const * const allPatches) - : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash), - patch(patch),allPatches(allPatches), State(StateFetchDiff) + pkgAcqMetaBase *TransactionManager, + struct IndexTarget const * const Target, + HashStringList const &ExpectedHashes, + indexRecords *MetaIndexParser, + DiffInfo const &patch, + std::vector<pkgAcqIndexMergeDiffs*> const * const allPatches) + : pkgAcqBaseIndex(Owner, TransactionManager, Target, ExpectedHashes, MetaIndexParser), + patch(patch), allPatches(allPatches), State(StateFetchDiff) { - - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(URI); - Debug = _config->FindB("Debug::pkgAcquire::Diffs",false); - Description = URIDesc; + RealURI = Target->URI; Desc.Owner = this; - Desc.ShortDesc = ShortDesc; + Description = Target->Description; + Desc.ShortDesc = Target->ShortDesc; Desc.URI = RealURI + ".diff/" + patch.file + ".gz"; Desc.Description = Description + " " + patch.file + string(".pdiff"); - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(RealURI + ".diff/" + patch.file); + + DestFile = GetPartialFileNameFromURI(RealURI + ".diff/" + patch.file); if(Debug) std::clog << "pkgAcqIndexMergeDiffs: " << Desc.URI << std::endl; @@ -817,13 +975,13 @@ pkgAcqIndexMergeDiffs::pkgAcqIndexMergeDiffs(pkgAcquire *Owner, QueueURI(Desc); } /*}}}*/ -void pkgAcqIndexMergeDiffs::Failed(string Message,pkgAcquire::MethodConfig * /*Cnf*/)/*{{{*/ +void pkgAcqIndexMergeDiffs::Failed(string Message,pkgAcquire::MethodConfig * Cnf)/*{{{*/ { if(Debug) std::clog << "pkgAcqIndexMergeDiffs failed: " << Desc.URI << " with " << Message << std::endl; - Complete = false; + + Item::Failed(Message,Cnf); Status = StatDone; - Dequeue(); // check if we are the first to fail, otherwise we are done here State = StateDoneDiff; @@ -835,22 +993,33 @@ void pkgAcqIndexMergeDiffs::Failed(string Message,pkgAcquire::MethodConfig * /*C // first failure means we should fallback State = StateErrorDiff; std::clog << "Falling back to normal index file acquire" << std::endl; - new pkgAcqIndex(Owner, RealURI, Description,Desc.ShortDesc, - ExpectedHash); + new pkgAcqIndex(Owner, TransactionManager, Target, ExpectedHashes, MetaIndexParser); } /*}}}*/ -void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,string Md5Hash, /*{{{*/ +void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,HashStringList const &Hashes, /*{{{*/ pkgAcquire::MethodConfig *Cnf) { if(Debug) std::clog << "pkgAcqIndexMergeDiffs::Done(): " << Desc.URI << std::endl; - Item::Done(Message,Size,Md5Hash,Cnf); + Item::Done(Message,Size,Hashes,Cnf); - string const FinalFile = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); + // FIXME: verify download before feeding it to rred + string const FinalFile = GetPartialFileNameFromURI(RealURI); 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) + { + Failed("Patch has Size/Hashsum mismatch", NULL); + return; + } + // rred expects the patch as $FinalFile.ed.$patchname.gz Rename(DestFile, FinalFile + ".ed." + patch.file + ".gz"); @@ -874,35 +1043,38 @@ void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,string M Local = true; Desc.URI = "rred:" + FinalFile; QueueURI(Desc); - Mode = "rred"; + SetActiveSubprocess("rred"); return; } // success in download/apply all diffs, clean up else if (State == StateApplyDiff) { // see if we really got the expected file - if(!ExpectedHash.empty() && !ExpectedHash.VerifyFile(DestFile)) + if(ExpectedHashes.usable() && !ExpectedHashes.VerifyFile(DestFile)) { RenameOnError(HashSumMismatch); return; } + + std::string FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(RealURI); + // move the result into place if(Debug) - std::clog << "Moving patched file in place: " << std::endl + std::clog << "Queue patched file in place: " << std::endl << DestFile << " -> " << FinalFile << std::endl; - Rename(DestFile, FinalFile); - chmod(FinalFile.c_str(), 0644); - // otherwise lists cleanup will eat the file - DestFile = FinalFile; + // queue for copy by the transaction manager + TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); // ensure the ed's are gone regardless of list-cleanup for (std::vector<pkgAcqIndexMergeDiffs *>::const_iterator I = allPatches->begin(); I != allPatches->end(); ++I) { - std::string patch = FinalFile + ".ed." + (*I)->patch.file + ".gz"; - unlink(patch.c_str()); + std::string const PartialFile = GetPartialFileNameFromURI(RealURI); + std::string patch = PartialFile + ".ed." + (*I)->patch.file + ".gz"; + unlink(patch.c_str()); } // all set and done @@ -912,66 +1084,116 @@ void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,string M } } /*}}}*/ +// AcqBaseIndex::VerifyHashByMetaKey - verify hash for the given metakey /*{{{*/ +bool pkgAcqBaseIndex::VerifyHashByMetaKey(HashStringList const &Hashes) +{ + if(MetaKey != "" && Hashes.usable()) + { + indexRecords::checkSum *Record = MetaIndexParser->Lookup(MetaKey); + if(Record && Record->Hashes.usable() && Hashes != Record->Hashes) + { + printHashSumComparision(RealURI, Record->Hashes, Hashes); + return false; + } + } + return true; +} + /*}}}*/ // AcqIndex::AcqIndex - Constructor /*{{{*/ // --------------------------------------------------------------------- -/* The package file is added to the queue and a second class is - instantiated to fetch the revision file */ +/* The package file is added to the queue and a second class is + instantiated to fetch the revision file */ pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner, string URI,string URIDesc,string ShortDesc, - HashString ExpectedHash, string comprExt) - : Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash) + HashStringList const &ExpectedHash) + : pkgAcqBaseIndex(Owner, 0, NULL, ExpectedHash, NULL) { - if(comprExt.empty() == true) - { - // autoselect the compression method - std::vector<std::string> types = APT::Configuration::getCompressionTypes(); - for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t) - comprExt.append(*t).append(" "); - if (comprExt.empty() == false) - comprExt.erase(comprExt.end()-1); - } - CompressionExtension = comprExt; + RealURI = URI; + AutoSelectCompression(); Init(URI, URIDesc, ShortDesc); + + if(_config->FindB("Debug::Acquire::Transaction", false) == true) + std::clog << "New pkgIndex with TransactionManager " + << TransactionManager << std::endl; } -pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner, IndexTarget const *Target, - HashString const &ExpectedHash, indexRecords const *MetaIndexParser) - : Item(Owner), RealURI(Target->URI), ExpectedHash(ExpectedHash) + /*}}}*/ +// AcqIndex::AcqIndex - Constructor /*{{{*/ +pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner, + pkgAcqMetaBase *TransactionManager, + IndexTarget const *Target, + HashStringList const &ExpectedHash, + indexRecords *MetaIndexParser) + : pkgAcqBaseIndex(Owner, TransactionManager, Target, ExpectedHash, + MetaIndexParser) { + RealURI = Target->URI; + // 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<std::string> types = APT::Configuration::getCompressionTypes(); - CompressionExtension = ""; - if (ExpectedHash.empty() == false) + CompressionExtensions = ""; + if (ExpectedHashes.usable()) { - for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t) - if (*t == "uncompressed" || MetaIndexParser->Exists(string(Target->MetaKey).append(".").append(*t)) == true) - CompressionExtension.append(*t).append(" "); + for (std::vector<std::string>::const_iterator t = types.begin(); + t != types.end(); ++t) + { + std::string CompressedMetaKey = string(Target->MetaKey).append(".").append(*t); + if (*t == "uncompressed" || + MetaIndexParser->Exists(CompressedMetaKey) == true) + CompressionExtensions.append(*t).append(" "); + } } else { for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t) - CompressionExtension.append(*t).append(" "); + CompressionExtensions.append(*t).append(" "); } - if (CompressionExtension.empty() == false) - CompressionExtension.erase(CompressionExtension.end()-1); - - Init(Target->URI, Target->Description, Target->ShortDesc); + 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) { - Decompression = false; - Erase = false; +void pkgAcqIndex::Init(string const &URI, string const &URIDesc, + string const &ShortDesc) +{ + Stage = STAGE_DOWNLOAD; - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(URI); + DestFile = GetPartialFileNameFromURI(URI); - std::string const comprExt = CompressionExtension.substr(0, CompressionExtension.find(' ')); - if (comprExt == "uncompressed") + CurrentCompressionExtension = CompressionExtensions.substr(0, CompressionExtensions.find(' ')); + if (CurrentCompressionExtension == "uncompressed") + { Desc.URI = URI; - else { - Desc.URI = URI + '.' + comprExt; - DestFile = DestFile + '.' + comprExt; + if(Target) + MetaKey = string(Target->MetaKey); + } + else + { + Desc.URI = URI + '.' + CurrentCompressionExtension; + DestFile = DestFile + '.' + CurrentCompressionExtension; + if(Target) + MetaKey = string(Target->MetaKey) + '.' + CurrentCompressionExtension; + } + + // load the filesize + if(MetaIndexParser) + { + indexRecords::checkSum *Record = MetaIndexParser->Lookup(MetaKey); + if(Record) + FileSize = Record->Size; + + InitByHashIfNeeded(MetaKey); } Desc.Description = URIDesc; @@ -981,22 +1203,44 @@ void pkgAcqIndex::Init(string const &URI, string const &URIDesc, string const &S QueueURI(Desc); } /*}}}*/ +// AcqIndex::AdjustForByHash - modify URI for by-hash support /*{{{*/ +void pkgAcqIndex::InitByHashIfNeeded(const std::string MetaKey) +{ + // 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 || + MetaIndexParser->GetSupportsAcquireByHash()) + { + indexRecords::checkSum *Record = MetaIndexParser->Lookup(MetaKey); + if(Record) + { + // FIXME: should we really use the best hash here? or a fixed one? + const HashString *TargetHash = Record->Hashes.find(""); + std::string ByHash = "/by-hash/" + TargetHash->HashType() + "/" + TargetHash->HashValue(); + size_t 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", + MetaKey.c_str()); + } + } +} + /*}}}*/ // AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- /* The only header we use is the last-modified header. */ -string pkgAcqIndex::Custom600Headers() +string pkgAcqIndex::Custom600Headers() const { - std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' ')); - string Final = _config->FindDir("Dir::State::lists"); - Final += URItoFileName(RealURI); - if (_config->FindB("Acquire::GzipIndexes",false)) - Final += compExt; - + string Final = GetFinalFilename(); + string msg = "\nIndex-File: true"; - // FIXME: this really should use "IndexTarget::IsOptional()" but that - // seems to be difficult without breaking ABI - if (ShortDesc().find("Translation") != 0) - msg += "\nFail-Ignore: true"; struct stat Buf; if (stat(Final.c_str(),&Buf) == 0) msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime); @@ -1004,131 +1248,135 @@ string pkgAcqIndex::Custom600Headers() return msg; } /*}}}*/ -void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/ +// pkgAcqIndex::Failed - getting the indexfile failed /*{{{*/ +void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) { - size_t const nextExt = CompressionExtension.find(' '); + size_t const nextExt = CompressionExtensions.find(' '); if (nextExt != std::string::npos) { - CompressionExtension = CompressionExtension.substr(nextExt+1); + CompressionExtensions = CompressionExtensions.substr(nextExt+1); Init(RealURI, Desc.Description, Desc.ShortDesc); return; } // on decompression failure, remove bad versions in partial/ - if (Decompression && Erase) { - string s = _config->FindDir("Dir::State::lists") + "partial/"; - s.append(URItoFileName(RealURI)); - unlink(s.c_str()); + if (Stage == STAGE_DECOMPRESS_AND_VERIFY) + { + unlink(EraseFileName.c_str()); } Item::Failed(Message,Cnf); + + /// cancel the entire transaction + TransactionManager->AbortTransaction(); } /*}}}*/ -// pkgAcqIndex::GetFinalFilename - Return the full final file path /*{{{*/ -std::string pkgAcqIndex::GetFinalFilename(std::string const &URI, - std::string const &compExt) +// pkgAcqIndex::GetFinalFilename - Return the full final file path /*{{{*/ +std::string pkgAcqIndex::GetFinalFilename() const { std::string FinalFile = _config->FindDir("Dir::State::lists"); - FinalFile += URItoFileName(URI); + FinalFile += URItoFileName(RealURI); if (_config->FindB("Acquire::GzipIndexes",false) == true) - FinalFile += '.' + compExt; + FinalFile += '.' + CurrentCompressionExtension; return FinalFile; } /*}}}*/ // AcqIndex::ReverifyAfterIMS - Reverify index after an ims-hit /*{{{*/ -void pkgAcqIndex::ReverifyAfterIMS(std::string const &FileName) +void pkgAcqIndex::ReverifyAfterIMS() { - std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' ')); + // update destfile to *not* include the compression extension when doing + // a reverify (as its uncompressed on disk already) + DestFile = GetPartialFileNameFromURI(RealURI); + + // adjust DestFile if its compressed on disk if (_config->FindB("Acquire::GzipIndexes",false) == true) - DestFile += compExt; + DestFile += '.' + CurrentCompressionExtension; - string FinalFile = GetFinalFilename(RealURI, compExt); - Rename(FinalFile, FileName); - Decompression = true; - Desc.URI = "copy:" + FileName; + // 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 gzip uri. */ -void pkgAcqIndex::Done(string Message,unsigned long long Size,string Hash, + is decompressed with a compressed uri. */ +void pkgAcqIndex::Done(string Message, + unsigned long long Size, + HashStringList const &Hashes, pkgAcquire::MethodConfig *Cfg) { - Item::Done(Message,Size,Hash,Cfg); - std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' ')); + Item::Done(Message,Size,Hashes,Cfg); - if (Decompression == true) + switch(Stage) { - if (_config->FindB("Debug::pkgAcquire::Auth", false)) - { - std::cerr << std::endl << RealURI << ": Computed Hash: " << Hash; - std::cerr << " Expected Hash: " << ExpectedHash.toStr() << std::endl; - } - - if (!ExpectedHash.empty() && ExpectedHash.toStr() != Hash) - { - Desc.URI = RealURI; - RenameOnError(HashSumMismatch); - return; - } - - // FIXME: this can go away once we only ever download stuff that - // has a valid hash and we never do GET based probing - // - /* Always verify the index file for correctness (all indexes must - * have a Package field) (LP: #346386) (Closes: #627642) - */ - FileFd fd(DestFile, FileFd::ReadOnly, FileFd::Extension); - // Only test for correctness if 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) - { - RenameOnError(InvalidFormat); - return; - } - } - - // Done, move it into position - string FinalFile = GetFinalFilename(RealURI, compExt); - Rename(DestFile,FinalFile); - chmod(FinalFile.c_str(),0644); - - /* We restore the original name to DestFile so that the clean operation - will work OK */ - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(RealURI); - if (_config->FindB("Acquire::GzipIndexes",false)) - DestFile += '.' + compExt; - - // Remove the compressed version. - if (Erase == true) - unlink(DestFile.c_str()); + 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 Message, + HashStringList const &Hashes, + pkgAcquire::MethodConfig *Cfg) +{ + // First check if the calculcated Hash of the (compressed) downloaded + // file matches the hash we have in the MetaIndexRecords for this file + if(VerifyHashByMetaKey(Hashes) == false) + { + RenameOnError(HashSumMismatch); + Failed(Message, Cfg); return; } - Erase = false; Complete = true; - + // Handle the unzipd case string FileName = LookupTag(Message,"Alt-Filename"); if (FileName.empty() == false) { - Decompression = true; + Stage = STAGE_DECOMPRESS_AND_VERIFY; Local = true; DestFile += ".decomp"; Desc.URI = "copy:" + FileName; QueueURI(Desc); - Mode = "copy"; + SetActiveSubprocess("copy"); return; } @@ -1139,89 +1387,111 @@ void pkgAcqIndex::Done(string Message,unsigned long long Size,string Hash, ErrorText = "Method gave a blank filename"; } - if (FileName == DestFile) - Erase = true; - else + // 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; - // do not reverify cdrom sources as apt-cdrom may rewrite the Packages - // file when its doing the indexcopy - if (RealURI.substr(0,6) == "cdrom:" && - StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) - return; - - // The files timestamp matches, for non-local URLs reverify the local - // file, for local file, uncompress again to ensure the hashsum is still - // matching the Release file - if (!Local && StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) + // 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) { - // set destfile to the final destfile - if(_config->FindB("Acquire::GzipIndexes",false) == false) - { - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(RealURI); - } + // do not reverify cdrom sources as apt-cdrom may rewrite the Packages + // file when its doing the indexcopy + if (RealURI.substr(0,6) == "cdrom:") + return; - ReverifyAfterIMS(FileName); + // The files timestamp matches, reverify by copy into partial/ + EraseFileName = ""; + ReverifyAfterIMS(); return; } - string decompProg; - // If we enable compressed indexes, queue for hash verification + // If we have compressed indexes enabled, queue for hash verification if (_config->FindB("Acquire::GzipIndexes",false)) { - DestFile = _config->FindDir("Dir::State::lists"); - DestFile += URItoFileName(RealURI) + '.' + compExt; - - Decompression = true; + DestFile = GetPartialFileNameFromURI(RealURI + '.' + 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 - decompProg = _config->Find(string("Acquire::CompressionTypes::").append(compExt),""); - if(decompProg.empty() == false); - else if(compExt == "uncompressed") + string decompProg; + if(CurrentCompressionExtension == "uncompressed") decompProg = "copy"; - else { - _error->Error("Unsupported extension: %s", compExt.c_str()); + else + decompProg = _config->Find(string("Acquire::CompressionTypes::").append(CurrentCompressionExtension),""); + if(decompProg.empty() == true) + { + _error->Error("Unsupported extension: %s", CurrentCompressionExtension.c_str()); return; } - Decompression = true; + // queue uri for the next stage + Stage = STAGE_DECOMPRESS_AND_VERIFY; DestFile += ".decomp"; Desc.URI = decompProg + ":" + FileName; QueueURI(Desc); + SetActiveSubprocess(decompProg); +} + /*}}}*/ +// pkgAcqIndex::StageDecompressDone - Final verification /*{{{*/ +void pkgAcqIndex::StageDecompressDone(string Message, + HashStringList const &Hashes, + pkgAcquire::MethodConfig *Cfg) +{ + if (ExpectedHashes.usable() && ExpectedHashes != Hashes) + { + Desc.URI = RealURI; + RenameOnError(HashSumMismatch); + printHashSumComparision(RealURI, ExpectedHashes, Hashes); + Failed(Message, Cfg); + return; + } - // FIXME: this points to a c++ string that goes out of scope - Mode = decompProg.c_str(); + if(!ValidateFile(DestFile)) + { + RenameOnError(InvalidFormat); + Failed(Message, Cfg); + return; + } + + // remove the compressed version of the file + unlink(EraseFileName.c_str()); + + // Done, queue for rename on transaction finished + TransactionManager->TransactionStageCopy(this, DestFile, GetFinalFilename()); + + return; } /*}}}*/ // AcqIndexTrans::pkgAcqIndexTrans - Constructor /*{{{*/ // --------------------------------------------------------------------- /* The Translation file is added to the queue */ pkgAcqIndexTrans::pkgAcqIndexTrans(pkgAcquire *Owner, - string URI,string URIDesc,string ShortDesc) - : pkgAcqIndex(Owner, URI, URIDesc, ShortDesc, HashString(), "") + string URI,string URIDesc,string ShortDesc) + : pkgAcqIndex(Owner, URI, URIDesc, ShortDesc, HashStringList()) { } -pkgAcqIndexTrans::pkgAcqIndexTrans(pkgAcquire *Owner, IndexTarget const *Target, - HashString const &ExpectedHash, indexRecords const *MetaIndexParser) - : pkgAcqIndex(Owner, Target, ExpectedHash, MetaIndexParser) +pkgAcqIndexTrans::pkgAcqIndexTrans(pkgAcquire *Owner, + pkgAcqMetaBase *TransactionManager, + IndexTarget const * const Target, + HashStringList const &ExpectedHashes, + indexRecords *MetaIndexParser) + : pkgAcqIndex(Owner, TransactionManager, Target, ExpectedHashes, MetaIndexParser) { } /*}}}*/ // AcqIndexTrans::Custom600Headers - Insert custom request headers /*{{{*/ -// --------------------------------------------------------------------- -string pkgAcqIndexTrans::Custom600Headers() +string pkgAcqIndexTrans::Custom600Headers() const { - std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' ')); - string Final = _config->FindDir("Dir::State::lists"); - Final += URItoFileName(RealURI); - if (_config->FindB("Acquire::GzipIndexes",false)) - Final += compExt; + string Final = GetFinalFilename(); struct stat Buf; if (stat(Final.c_str(),&Buf) != 0) @@ -1230,265 +1500,447 @@ string pkgAcqIndexTrans::Custom600Headers() } /*}}}*/ // AcqIndexTrans::Failed - Silence failure messages for missing files /*{{{*/ -// --------------------------------------------------------------------- -/* */ void pkgAcqIndexTrans::Failed(string Message,pkgAcquire::MethodConfig *Cnf) { - size_t const nextExt = CompressionExtension.find(' '); + size_t const nextExt = CompressionExtensions.find(' '); if (nextExt != std::string::npos) { - CompressionExtension = CompressionExtension.substr(nextExt+1); + CompressionExtensions = CompressionExtensions.substr(nextExt+1); Init(RealURI, Desc.Description, Desc.ShortDesc); Status = StatIdle; return; } - if (Cnf->LocalOnly == true || + Item::Failed(Message,Cnf); + + // 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; - Complete = false; - Dequeue(); - return; } +} + /*}}}*/ +// AcqMetaBase::Add - Add a item to the current Transaction /*{{{*/ +void pkgAcqMetaBase::Add(Item *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; - Item::Failed(Message,Cnf); + // ensure the toplevel is in error state too + for (std::vector<Item*>::iterator I = Transaction.begin(); + I != Transaction.end(); ++I) + { + if(_config->FindB("Debug::Acquire::Transaction", false) == true) + std::clog << " Cancel: " << (*I)->DestFile << std::endl; + // the transaction will abort, so stop anything that is idle + if ((*I)->Status == pkgAcquire::Item::StatIdle) + (*I)->Status = pkgAcquire::Item::StatDone; + + // kill failed files in partial + if ((*I)->Status == pkgAcquire::Item::StatError) + { + std::string const PartialFile = GetPartialFileName(flNotDir((*I)->DestFile)); + if(FileExists(PartialFile)) + Rename(PartialFile, PartialFile + ".FAILED"); + } + } +} + /*}}}*/ +// AcqMetaBase::TransactionHasError - Check for errors in Transaction /*{{{*/ +bool pkgAcqMetaBase::TransactionHasError() +{ + for (pkgAcquire::ItemIterator I = Transaction.begin(); + I != Transaction.end(); ++I) + if((*I)->Status != pkgAcquire::Item::StatDone && + (*I)->Status != pkgAcquire::Item::StatIdle) + return true; + + 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<Item*>::iterator I = Transaction.begin(); + I != Transaction.end(); ++I) + { + if((*I)->PartialFile != "") + { + if(_config->FindB("Debug::Acquire::Transaction", false) == true) + std::clog << "mv " << (*I)->PartialFile << " -> "<< (*I)->DestFile << " " + << (*I)->DescURI() << std::endl; + + Rename((*I)->PartialFile, (*I)->DestFile); + ChangeOwnerAndPermissionOfFile("CommitTransaction", (*I)->DestFile.c_str(), "root", "root", 0644); + + } else { + if(_config->FindB("Debug::Acquire::Transaction", false) == true) + std::clog << "rm " + << (*I)->DestFile + << " " + << (*I)->DescURI() + << std::endl; + unlink((*I)->DestFile.c_str()); + } + // mark that this transaction is finished + (*I)->TransactionManager = 0; + } +} + /*}}}*/ +// AcqMetaBase::TransactionStageCopy - Stage a file for copying /*{{{*/ +void pkgAcqMetaBase::TransactionStageCopy(Item *I, + const std::string &From, + const std::string &To) +{ + I->PartialFile = From; + I->DestFile = To; +} + /*}}}*/ +// AcqMetaBase::TransactionStageRemoval - Sage a file for removal /*{{{*/ +void pkgAcqMetaBase::TransactionStageRemoval(Item *I, + const std::string &FinalFile) +{ + I->PartialFile = ""; + I->DestFile = FinalFile; } /*}}}*/ -pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner, /*{{{*/ +// AcqMetaBase::GenerateAuthWarning - Check gpg authentication error /*{{{*/ +bool pkgAcqMetaBase::CheckStopAuthentication(const std::string &RealURI, + const std::string &Message) +{ + // FIXME: this entire function can do now that we disallow going to + // a unauthenticated state and can cleanly rollback + + string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); + + if(FileExists(Final)) + { + 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()); + 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; +} + /*}}}*/ +// AcqMetaSig::AcqMetaSig - Constructor /*{{{*/ +pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner, + pkgAcqMetaBase *TransactionManager, string URI,string URIDesc,string ShortDesc, - string MetaIndexURI, string MetaIndexURIDesc, - string MetaIndexShortDesc, + string MetaIndexFile, const vector<IndexTarget*>* IndexTargets, indexRecords* MetaIndexParser) : - Item(Owner), RealURI(URI), MetaIndexURI(MetaIndexURI), - MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc), - MetaIndexParser(MetaIndexParser), IndexTargets(IndexTargets) + pkgAcqMetaBase(Owner, IndexTargets, MetaIndexParser, + HashStringList(), TransactionManager), + RealURI(URI), MetaIndexFile(MetaIndexFile), URIDesc(URIDesc), + ShortDesc(ShortDesc) { DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(URI); + DestFile += URItoFileName(RealURI); - // remove any partial downloaded sig-file in partial/. - // it may confuse proxies and is too small to warrant a + // 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 = URIDesc; Desc.Owner = this; Desc.ShortDesc = ShortDesc; Desc.URI = URI; - - string Final = _config->FindDir("Dir::State::lists"); - Final += URItoFileName(RealURI); - if (RealFileExists(Final) == true) - { - // File was already in place. It needs to be re-downloaded/verified - // because Release might have changed, we do give it a different - // name than DestFile because otherwise the http method will - // send If-Range requests and there are too many broken servers - // out there that do not understand them - LastGoodSig = DestFile+".reverify"; - Rename(Final,LastGoodSig); - } QueueURI(Desc); } /*}}}*/ pkgAcqMetaSig::~pkgAcqMetaSig() /*{{{*/ { - // if the file was never queued undo file-changes done in the constructor - if (QueueCounter == 1 && Status == StatIdle && FileSize == 0 && Complete == false && - LastGoodSig.empty() == false) - { - string const Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); - if (RealFileExists(Final) == false && RealFileExists(LastGoodSig) == true) - Rename(LastGoodSig, Final); - } - } /*}}}*/ // pkgAcqMetaSig::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- -/* The only header we use is the last-modified header. */ -string pkgAcqMetaSig::Custom600Headers() +string pkgAcqMetaSig::Custom600Headers() const { - struct stat Buf; - if (stat(LastGoodSig.c_str(),&Buf) != 0) - return "\nIndex-File: true"; - - return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime); + std::string Header = GetCustom600Headers(RealURI); + return Header; } - -void pkgAcqMetaSig::Done(string Message,unsigned long long Size,string MD5, + /*}}}*/ +// pkgAcqMetaSig::Done - The signature was downloaded/verified /*{{{*/ +// --------------------------------------------------------------------- +/* The only header we use is the last-modified header. */ +void pkgAcqMetaSig::Done(string Message,unsigned long long Size, + HashStringList const &Hashes, pkgAcquire::MethodConfig *Cfg) { - Item::Done(Message,Size,MD5,Cfg); + Item::Done(Message, Size, Hashes, Cfg); - string FileName = LookupTag(Message,"Filename"); - if (FileName.empty() == true) + if(AuthPass == false) { - Status = StatError; - ErrorText = "Method gave a blank filename"; + if(CheckDownloadDone(Message, RealURI) == true) + { + // destfile will be modified to point to MetaIndexFile for the + // gpgv method, so we need to save it here + MetaIndexFileSignature = DestFile; + QueueForSignatureVerify(MetaIndexFile, MetaIndexFileSignature); + } return; } - - if (FileName != DestFile) + else { - // We have to copy it into place - Local = true; - Desc.URI = "copy:" + FileName; - QueueURI(Desc); - return; + if(CheckAuthDone(Message, RealURI) == true) + { + std::string FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(RealURI); + TransactionManager->TransactionStageCopy(this, MetaIndexFileSignature, FinalFile); + } } - - Complete = true; - - // put the last known good file back on i-m-s hit (it will - // be re-verified again) - // Else do nothing, we have the new file in DestFile then - if(StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) - Rename(LastGoodSig, DestFile); - - // queue a pkgAcqMetaIndex to be verified against the sig we just retrieved - new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, - MetaIndexShortDesc, DestFile, IndexTargets, - MetaIndexParser); - } /*}}}*/ void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)/*{{{*/ { string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); - // if we get a network error we fail gracefully - if(Status == StatTransientNetworkError) - { - Item::Failed(Message,Cnf); - // move the sigfile back on transient network failures - if(FileExists(LastGoodSig)) - Rename(LastGoodSig,Final); + // check if we need to fail at this point + if (AuthPass == true && CheckStopAuthentication(RealURI, Message)) + return; - // set the status back to , Item::Failed likes to reset it - Status = pkgAcquire::Item::StatTransientNetworkError; - return; - } + // FIXME: meh, this is not really elegant + string InReleaseURI = RealURI.replace(RealURI.rfind("Release.gpg"), 12, + "InRelease"); + string FinalInRelease = _config->FindDir("Dir::State::lists") + URItoFileName(InReleaseURI); - // Delete any existing sigfile when the acquire failed - unlink(Final.c_str()); + if (RealFileExists(Final) || RealFileExists(FinalInRelease)) + { + std::string downgrade_msg; + strprintf(downgrade_msg, _("The repository '%s' is no longer signed."), + URIDesc.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.")); + + } else { + _error->Error("%s", downgrade_msg.c_str()); + Rename(MetaIndexFile, MetaIndexFile+".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."), + URIDesc.c_str()); + + // this ensures that any file in the lists/ dir is removed by the + // transaction + DestFile = GetPartialFileNameFromURI(RealURI); + TransactionManager->TransactionStageRemoval(this, DestFile); + + // only allow going further if the users explicitely wants it + if(MetaIndexParser->IsAlwaysTrusted() || _config->FindB("Acquire::AllowInsecureRepositories") == true) + { + // we parse the indexes here because at this point the user wanted + // a repository that may potentially harm him + MetaIndexParser->Load(MetaIndexFile); + QueueIndexes(true); + } + else + { + _error->Error("Use --allow-insecure-repositories to force the update"); + } - // queue a pkgAcqMetaIndex with no sigfile - new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc, - "", IndexTargets, MetaIndexParser); + Item::Failed(Message,Cnf); - if (Cnf->LocalOnly == true || + // 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; - Complete = false; - Dequeue(); - return; } - - Item::Failed(Message,Cnf); } /*}}}*/ pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner, /*{{{*/ + pkgAcqMetaBase *TransactionManager, string URI,string URIDesc,string ShortDesc, - string SigFile, - const vector<struct IndexTarget*>* IndexTargets, + string MetaIndexSigURI,string MetaIndexSigURIDesc, string MetaIndexSigShortDesc, + const vector<IndexTarget*>* IndexTargets, indexRecords* MetaIndexParser) : - Item(Owner), RealURI(URI), SigFile(SigFile), IndexTargets(IndexTargets), - MetaIndexParser(MetaIndexParser), AuthPass(false), IMSHit(false) + pkgAcqMetaBase(Owner, IndexTargets, MetaIndexParser, HashStringList(), + TransactionManager), + RealURI(URI), URIDesc(URIDesc), ShortDesc(ShortDesc), + MetaIndexSigURI(MetaIndexSigURI), MetaIndexSigURIDesc(MetaIndexSigURIDesc), + MetaIndexSigShortDesc(MetaIndexSigShortDesc) { - DestFile = _config->FindDir("Dir::State::lists") + "partial/"; - DestFile += URItoFileName(URI); + if(TransactionManager == NULL) + { + this->TransactionManager = this; + this->TransactionManager->Add(this); + } + + if(_config->FindB("Debug::Acquire::Transaction", false) == true) + std::clog << "New pkgAcqMetaIndex with TransactionManager " + << this->TransactionManager << std::endl; + + + Init(URIDesc, ShortDesc); +} + /*}}}*/ +// pkgAcqMetaIndex::Init - Delayed constructor /*{{{*/ +void pkgAcqMetaIndex::Init(std::string URIDesc, std::string ShortDesc) +{ + DestFile = GetPartialFileNameFromURI(RealURI); // Create the item Desc.Description = URIDesc; Desc.Owner = this; Desc.ShortDesc = ShortDesc; - Desc.URI = URI; + Desc.URI = RealURI; + // we expect more item + ExpectedAdditionalItems = IndexTargets->size(); QueueURI(Desc); } /*}}}*/ // pkgAcqMetaIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- -/* The only header we use is the last-modified header. */ -string pkgAcqMetaIndex::Custom600Headers() +string pkgAcqMetaIndex::Custom600Headers() const { - string Final = _config->FindDir("Dir::State::lists"); - Final += URItoFileName(RealURI); - - struct stat Buf; - if (stat(Final.c_str(),&Buf) != 0) - return "\nIndex-File: true"; - - return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime); + return GetCustom600Headers(RealURI); } /*}}}*/ -void pkgAcqMetaIndex::Done(string Message,unsigned long long Size,string Hash, /*{{{*/ +void pkgAcqMetaIndex::Done(string Message,unsigned long long Size, /*{{{*/ + HashStringList const &Hashes, pkgAcquire::MethodConfig *Cfg) { - Item::Done(Message,Size,Hash,Cfg); + Item::Done(Message,Size,Hashes,Cfg); - // MetaIndexes are done in two passes: one to download the - // metaindex with an appropriate method, and a second to verify it - // with the gpgv method - - if (AuthPass == true) + if(CheckDownloadDone(Message, RealURI)) { - AuthDone(Message); + // we have a Release file, now download the Signature, all further + // verify/queue for additional downloads will be done in the + // pkgAcqMetaSig::Done() code + std::string MetaIndexFile = DestFile; + new pkgAcqMetaSig(Owner, TransactionManager, + MetaIndexSigURI, MetaIndexSigURIDesc, + MetaIndexSigShortDesc, MetaIndexFile, IndexTargets, + MetaIndexParser); - // all cool, move Release file into place - Complete = true; + string FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(RealURI); + TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); } - else - { - RetrievalDone(Message); - if (!Complete) - // Still more retrieving to do - return; +} + /*}}}*/ +bool pkgAcqMetaBase::CheckAuthDone(string Message, const string &RealURI) /*{{{*/ +{ + // 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 (SigFile == "") - { - // There was no signature file, so we are finished. Download - // the indexes and do only hashsum verification if possible - MetaIndexParser->Load(DestFile); - QueueIndexes(false); - } - else - { - // There was a signature file, so pass it to gpgv for - // verification - - if (_config->FindB("Debug::pkgAcquire::Auth", false)) - std::cerr << "Metaindex acquired, queueing gpg verification (" - << SigFile << "," << DestFile << ")\n"; - AuthPass = true; - Desc.URI = "gpgv:" + SigFile; - QueueURI(Desc); - Mode = "gpgv"; - return; - } + if (!MetaIndexParser->Load(DestFile)) + { + Status = StatAuthError; + ErrorText = MetaIndexParser->ErrorText; + return false; } - if (Complete == true) + if (!VerifyVendor(Message, RealURI)) { - string FinalFile = _config->FindDir("Dir::State::lists"); - FinalFile += URItoFileName(RealURI); - if (SigFile == DestFile) - SigFile = FinalFile; - Rename(DestFile,FinalFile); - chmod(FinalFile.c_str(),0644); - DestFile = FinalFile; + return false; } + + if (_config->FindB("Debug::pkgAcquire::Auth", false)) + std::cerr << "Signature verification succeeded: " + << DestFile << std::endl; + + // Download further indexes with verification + // + // it would be really nice if we could simply do + // if (IMSHit == false) QueueIndexes(true) + // and skip the download if the Release file has not changed + // - but right now the list cleaner will needs to be tricked + // to not delete all our packages/source indexes in this case + QueueIndexes(true); + + return true; } /*}}}*/ -void pkgAcqMetaIndex::RetrievalDone(string Message) /*{{{*/ +// pkgAcqMetaBase::GetCustom600Headers - Get header for AcqMetaBase /*{{{*/ +// --------------------------------------------------------------------- +string pkgAcqMetaBase::GetCustom600Headers(const string &RealURI) 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 FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(RealURI); + + struct stat Buf; + if (stat(FinalFile.c_str(),&Buf) == 0) + Header += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime); + + return Header; +} + /*}}}*/ +// pkgAcqMetaBase::QueueForSignatureVerify /*{{{*/ +void pkgAcqMetaBase::QueueForSignatureVerify(const std::string &MetaIndexFile, + const std::string &MetaIndexFileSignature) +{ + AuthPass = true; + Desc.URI = "gpgv:" + MetaIndexFileSignature; + DestFile = MetaIndexFile; + QueueURI(Desc); + SetActiveSubprocess("gpgv"); +} + /*}}}*/ +// pkgAcqMetaBase::CheckDownloadDone /*{{{*/ +bool pkgAcqMetaBase::CheckDownloadDone(const std::string &Message, + const std::string &RealURI) { // We have just finished downloading a Release file (it is not // verified yet) @@ -1498,7 +1950,7 @@ void pkgAcqMetaIndex::RetrievalDone(string Message) /*{{{*/ { Status = StatError; ErrorText = "Method gave a blank filename"; - return; + return false; } if (FileName != DestFile) @@ -1506,7 +1958,7 @@ void pkgAcqMetaIndex::RetrievalDone(string Message) /*{{{*/ Local = true; Desc.URI = "copy:" + FileName; QueueURI(Desc); - return; + return false; } // make sure to verify against the right file on I-M-S hit @@ -1515,95 +1967,17 @@ void pkgAcqMetaIndex::RetrievalDone(string Message) /*{{{*/ { string FinalFile = _config->FindDir("Dir::State::lists"); FinalFile += URItoFileName(RealURI); - if (SigFile == DestFile) - { - SigFile = FinalFile; - // constructor of pkgAcqMetaClearSig moved it out of the way, - // now move it back in on IMS hit for the 'old' file - string const OldClearSig = DestFile + ".reverify"; - if (RealFileExists(OldClearSig) == true) - Rename(OldClearSig, FinalFile); - } DestFile = FinalFile; } - Complete = true; -} - /*}}}*/ -void pkgAcqMetaIndex::AuthDone(string 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 (!MetaIndexParser->Load(DestFile)) - { - Status = StatAuthError; - ErrorText = MetaIndexParser->ErrorText; - return; - } - - if (!VerifyVendor(Message)) - { - return; - } - - if (_config->FindB("Debug::pkgAcquire::Auth", false)) - std::cerr << "Signature verification succeeded: " - << DestFile << std::endl; - // do not trust any previously unverified content that we may have - string LastGoodSigFile = _config->FindDir("Dir::State::lists").append("partial/").append(URItoFileName(RealURI)); - if (DestFile != SigFile) - LastGoodSigFile.append(".gpg"); - LastGoodSigFile.append(".reverify"); - if(IMSHit == false && RealFileExists(LastGoodSigFile) == false) - { - for (vector <struct IndexTarget*>::const_iterator Target = IndexTargets->begin(); - Target != IndexTargets->end(); - ++Target) - { - // remove old indexes - std::string index = _config->FindDir("Dir::State::lists") + - URItoFileName((*Target)->URI); - unlink(index.c_str()); - // and also old gzipindexes - std::vector<std::string> types = APT::Configuration::getCompressionTypes(); - for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t) - { - index += '.' + (*t); - unlink(index.c_str()); - } - } - } - - - // Download further indexes with verification - QueueIndexes(true); - - // is it a clearsigned MetaIndex file? - if (DestFile == SigFile) - return; + // set Item to complete as the remaining work is all local (verify etc) + Complete = true; - // Done, move signature file into position - string VerifiedSigFile = _config->FindDir("Dir::State::lists") + - URItoFileName(RealURI) + ".gpg"; - Rename(SigFile,VerifiedSigFile); - chmod(VerifiedSigFile.c_str(),0644); + return true; } /*}}}*/ -void pkgAcqMetaIndex::QueueIndexes(bool verify) /*{{{*/ +void pkgAcqMetaBase::QueueIndexes(bool verify) /*{{{*/ { -#if 0 - /* Reject invalid, existing Release files (LP: #346386) (Closes: #627642) - * FIXME: Disabled; it breaks unsigned repositories without hashes */ - if (!verify && FileExists(DestFile) && !MetaIndexParser->Load(DestFile)) - { - Status = StatError; - ErrorText = MetaIndexParser->ErrorText; - return; - } -#endif bool transInRelease = false; { std::vector<std::string> const keys = MetaIndexParser->MetaKeys(); @@ -1616,11 +1990,13 @@ void pkgAcqMetaIndex::QueueIndexes(bool verify) /*{{{*/ } } - for (vector <struct IndexTarget*>::const_iterator Target = IndexTargets->begin(); + // at this point the real Items are loaded in the fetcher + ExpectedAdditionalItems = 0; + for (vector <IndexTarget*>::const_iterator Target = IndexTargets->begin(); Target != IndexTargets->end(); ++Target) { - HashString ExpectedIndexHash; + HashStringList ExpectedIndexHashes; const indexRecords::checkSum *Record = MetaIndexParser->Lookup((*Target)->MetaKey); bool compressedAvailable = false; if (Record == NULL) @@ -1644,14 +2020,16 @@ void pkgAcqMetaIndex::QueueIndexes(bool verify) /*{{{*/ } else { - ExpectedIndexHash = Record->Hash; + ExpectedIndexHashes = Record->Hashes; if (_config->FindB("Debug::pkgAcquire::Auth", false)) { - std::cerr << "Queueing: " << (*Target)->URI << std::endl; - std::cerr << "Expected Hash: " << ExpectedIndexHash.toStr() << std::endl; + std::cerr << "Queueing: " << (*Target)->URI << std::endl + << "Expected Hash:" << std::endl; + for (HashStringList::const_iterator hs = ExpectedIndexHashes.begin(); hs != ExpectedIndexHashes.end(); ++hs) + std::cerr << "\t- " << hs->toStr() << std::endl; std::cerr << "For: " << Record->MetaKeyFilename << std::endl; } - if (verify == true && ExpectedIndexHash.empty() == true && (*Target)->IsOptional() == false) + if (verify == true && ExpectedIndexHashes.empty() == true && (*Target)->IsOptional() == false) { Status = StatAuthError; strprintf(ErrorText, _("Unable to find hash sum for '%s' in Release file"), (*Target)->MetaKey.c_str()); @@ -1661,17 +2039,13 @@ void pkgAcqMetaIndex::QueueIndexes(bool verify) /*{{{*/ if ((*Target)->IsOptional() == true) { - if ((*Target)->IsSubIndex() == true) - new pkgAcqSubIndex(Owner, (*Target)->URI, (*Target)->Description, - (*Target)->ShortDesc, ExpectedIndexHash); - else if (transInRelease == false || Record != NULL || compressedAvailable == true) + if (transInRelease == false || Record != NULL || compressedAvailable == true) { if (_config->FindB("Acquire::PDiffs",true) == true && transInRelease == true && MetaIndexParser->Exists((*Target)->MetaKey + ".diff/Index") == true) - new pkgAcqDiffIndex(Owner, (*Target)->URI, (*Target)->Description, - (*Target)->ShortDesc, ExpectedIndexHash); + new pkgAcqDiffIndex(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser); else - new pkgAcqIndexTrans(Owner, *Target, ExpectedIndexHash, MetaIndexParser); + new pkgAcqIndexTrans(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser); } continue; } @@ -1682,14 +2056,13 @@ void pkgAcqMetaIndex::QueueIndexes(bool verify) /*{{{*/ instead, but passing the required info to it is to much hassle */ if(_config->FindB("Acquire::PDiffs",true) == true && (verify == false || MetaIndexParser->Exists((*Target)->MetaKey + ".diff/Index") == true)) - new pkgAcqDiffIndex(Owner, (*Target)->URI, (*Target)->Description, - (*Target)->ShortDesc, ExpectedIndexHash); + new pkgAcqDiffIndex(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser); else - new pkgAcqIndex(Owner, *Target, ExpectedIndexHash, MetaIndexParser); + new pkgAcqIndex(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser); } } /*}}}*/ -bool pkgAcqMetaIndex::VerifyVendor(string Message) /*{{{*/ +bool pkgAcqMetaBase::VerifyVendor(string Message, const string &RealURI)/*{{{*/ { string::size_type pos; @@ -1766,147 +2139,174 @@ bool pkgAcqMetaIndex::VerifyVendor(string Message) /*{{{*/ return true; } /*}}}*/ -// pkgAcqMetaIndex::Failed - no Release file present or no signature file present /*{{{*/ -// --------------------------------------------------------------------- -/* */ -void pkgAcqMetaIndex::Failed(string Message,pkgAcquire::MethodConfig * /*Cnf*/) +// pkgAcqMetaIndex::Failed - no Release file present /*{{{*/ +void pkgAcqMetaIndex::Failed(string Message, + pkgAcquire::MethodConfig * Cnf) { - if (AuthPass == true) - { - // gpgv method failed, if we have a good signature - string LastGoodSigFile = _config->FindDir("Dir::State::lists").append("partial/").append(URItoFileName(RealURI)); - if (DestFile != SigFile) - LastGoodSigFile.append(".gpg"); - LastGoodSigFile.append(".reverify"); + pkgAcquire::Item::Failed(Message, Cnf); + Status = StatDone; - if(FileExists(LastGoodSigFile)) - { - string VerifiedSigFile = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); - if (DestFile != SigFile) - VerifiedSigFile.append(".gpg"); - Rename(LastGoodSigFile, VerifiedSigFile); - 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; - } 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()); - return; - } else { - _error->Warning(_("GPG error: %s: %s"), - Desc.Description.c_str(), - LookupTag(Message,"Message").c_str()); - } - // gpgv method failed - ReportMirrorFailure("GPGFailure"); - } + string FinalFile = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); - /* Always move the meta index, even if gpgv failed. This ensures - * that PackageFile objects are correctly filled in */ - if (FileExists(DestFile)) { - string FinalFile = _config->FindDir("Dir::State::lists"); - FinalFile += URItoFileName(RealURI); - /* InRelease files become Release files, otherwise - * they would be considered as trusted later on */ - if (SigFile == DestFile) { - RealURI = RealURI.replace(RealURI.rfind("InRelease"), 9, - "Release"); - FinalFile = FinalFile.replace(FinalFile.rfind("InRelease"), 9, - "Release"); - SigFile = FinalFile; - } - Rename(DestFile,FinalFile); - chmod(FinalFile.c_str(),0644); + _error->Warning(_("The repository '%s' does not have a Release file. " + "This is deprecated, please contact the owner of the " + "repository."), URIDesc.c_str()); - DestFile = FinalFile; - } - - // No Release file was present, or verification failed, so fall + // No Release file was present so fall // back to queueing Packages files without verification - QueueIndexes(false); + // only allow going further if the users explicitely wants it + if(MetaIndexParser->IsAlwaysTrusted() || _config->FindB("Acquire::AllowInsecureRepositories") == true) + { + // Done, queue for rename on transaction finished + if (FileExists(DestFile)) + TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); + + // queue without any kind of hashsum support + QueueIndexes(false); + } else { + // warn if the repository is unsinged + _error->Error("Use --allow-insecure-repositories to force the update"); + TransactionManager->AbortTransaction(); + Status = StatError; + return; + } +} + /*}}}*/ +void pkgAcqMetaIndex::Finished() /*{{{*/ +{ + if(_config->FindB("Debug::Acquire::Transaction", false) == true) + std::clog << "Finished: " << DestFile <<std::endl; + if(TransactionManager != NULL && + TransactionManager->TransactionHasError() == false) + TransactionManager->CommitTransaction(); } /*}}}*/ pkgAcqMetaClearSig::pkgAcqMetaClearSig(pkgAcquire *Owner, /*{{{*/ string const &URI, string const &URIDesc, string const &ShortDesc, string const &MetaIndexURI, string const &MetaIndexURIDesc, string const &MetaIndexShortDesc, string const &MetaSigURI, string const &MetaSigURIDesc, string const &MetaSigShortDesc, - const vector<struct IndexTarget*>* IndexTargets, + const vector<IndexTarget*>* IndexTargets, indexRecords* MetaIndexParser) : - pkgAcqMetaIndex(Owner, URI, URIDesc, ShortDesc, "", IndexTargets, MetaIndexParser), - MetaIndexURI(MetaIndexURI), MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc), - MetaSigURI(MetaSigURI), MetaSigURIDesc(MetaSigURIDesc), MetaSigShortDesc(MetaSigShortDesc) + pkgAcqMetaIndex(Owner, NULL, URI, URIDesc, ShortDesc, MetaSigURI, MetaSigURIDesc,MetaSigShortDesc, IndexTargets, MetaIndexParser), + MetaIndexURI(MetaIndexURI), MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc), + MetaSigURI(MetaSigURI), MetaSigURIDesc(MetaSigURIDesc), MetaSigShortDesc(MetaSigShortDesc) { - SigFile = DestFile; + // index targets + (worst case:) Release/Release.gpg + ExpectedAdditionalItems = IndexTargets->size() + 2; - // keep the old InRelease around in case of transistent network errors - string const Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); - if (RealFileExists(Final) == true) - { - string const LastGoodSig = DestFile + ".reverify"; - Rename(Final,LastGoodSig); - } } /*}}}*/ pkgAcqMetaClearSig::~pkgAcqMetaClearSig() /*{{{*/ { - // if the file was never queued undo file-changes done in the constructor - if (QueueCounter == 1 && Status == StatIdle && FileSize == 0 && Complete == false) - { - string const Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI); - string const LastGoodSig = DestFile + ".reverify"; - if (RealFileExists(Final) == false && RealFileExists(LastGoodSig) == true) - Rename(LastGoodSig, Final); - } } /*}}}*/ // pkgAcqMetaClearSig::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- -// FIXME: this can go away once the InRelease file is used widely -string pkgAcqMetaClearSig::Custom600Headers() +string pkgAcqMetaClearSig::Custom600Headers() const { - string Final = _config->FindDir("Dir::State::lists"); - Final += URItoFileName(RealURI); + string Header = GetCustom600Headers(RealURI); + Header += "\nFail-Ignore: true"; + return Header; +} + /*}}}*/ +// pkgAcqMetaClearSig::Done - We got a file /*{{{*/ +// --------------------------------------------------------------------- +void pkgAcqMetaClearSig::Done(std::string Message,unsigned long long /*Size*/, + HashStringList const &/*Hashes*/, + pkgAcquire::MethodConfig *Cnf) +{ + // if we expect a ClearTextSignature (InRelase), 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; + } - struct stat Buf; - if (stat(Final.c_str(),&Buf) != 0) + if(AuthPass == false) { - Final = DestFile + ".reverify"; - if (stat(Final.c_str(),&Buf) != 0) - return "\nIndex-File: true\nFail-Ignore: true\n"; + if(CheckDownloadDone(Message, RealURI) == true) + QueueForSignatureVerify(DestFile, DestFile); + return; } + else + { + if(CheckAuthDone(Message, RealURI) == true) + { + string FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(RealURI); - return "\nIndex-File: true\nFail-Ignore: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime); + // queue for copy in place + TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); + } + } } /*}}}*/ void pkgAcqMetaClearSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/ { + Item::Failed(Message, Cnf); + + // we failed, we will not get additional items from this method + ExpectedAdditionalItems = 0; + if (AuthPass == false) { - // Remove the 'old' InRelease file if we try Release.gpg now as otherwise - // the file will stay around and gives a false-auth impression (CVE-2012-0214) + // 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) string FinalFile = _config->FindDir("Dir::State::lists"); FinalFile.append(URItoFileName(RealURI)); - if (FileExists(FinalFile)) - unlink(FinalFile.c_str()); + TransactionManager->TransactionStageRemoval(this, FinalFile); + Status = StatDone; - new pkgAcqMetaSig(Owner, - MetaSigURI, MetaSigURIDesc, MetaSigShortDesc, + new pkgAcqMetaIndex(Owner, TransactionManager, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc, + MetaSigURI, MetaSigURIDesc, MetaSigShortDesc, IndexTargets, MetaIndexParser); - if (Cnf->LocalOnly == true || - StringToBool(LookupTag(Message, "Transient-Failure"), false) == false) - Dequeue(); } else - pkgAcqMetaIndex::Failed(Message, Cnf); + { + if(CheckStopAuthentication(RealURI, Message)) + return; + + _error->Warning(_("The data from '%s' is not signed. Packages " + "from that repository can not be authenticated."), + URIDesc.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(MetaIndexParser->IsAlwaysTrusted() || _config->FindB("Acquire::AllowInsecureRepositories") == true) + { + Status = StatDone; + + /* Always move the meta index, even if gpgv failed. This ensures + * that PackageFile objects are correctly filled in */ + if (FileExists(DestFile)) + { + string FinalFile = _config->FindDir("Dir::State::lists"); + FinalFile += URItoFileName(RealURI); + /* InRelease files become Release files, otherwise + * they would be considered as trusted later on */ + RealURI = RealURI.replace(RealURI.rfind("InRelease"), 9, + "Release"); + FinalFile = FinalFile.replace(FinalFile.rfind("InRelease"), 9, + "Release"); + + // Done, queue for rename on transaction finished + TransactionManager->TransactionStageCopy(this, DestFile, FinalFile); + } + QueueIndexes(false); + } else { + // warn if the repository is unsigned + _error->Error("Use --allow-insecure-repositories to force the update"); + TransactionManager->AbortTransaction(); + Status = StatError; + } + } } /*}}}*/ // AcqArchive::AcqArchive - Constructor /*{{{*/ @@ -1916,7 +2316,7 @@ void pkgAcqMetaClearSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /* pkgAcqArchive::pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources, pkgRecords *Recs,pkgCache::VerIterator const &Version, string &StoreFilename) : - Item(Owner), Version(Version), Sources(Sources), Recs(Recs), + Item(Owner, HashStringList()), Version(Version), Sources(Sources), Recs(Recs), StoreFilename(StoreFilename), Vf(Version.FileList()), Trusted(false) { @@ -2001,7 +2401,6 @@ pkgAcqArchive::pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources, checking later. */ bool pkgAcqArchive::QueueNext() { - string const ForceHash = _config->Find("Acquire::ForceHash"); for (; Vf.end() == false; ++Vf) { // Ignore not source sources @@ -2022,31 +2421,10 @@ bool pkgAcqArchive::QueueNext() pkgRecords::Parser &Parse = Recs->Lookup(Vf); if (_error->PendingError() == true) return false; - + string PkgFile = Parse.FileName(); - if (ForceHash.empty() == false) - { - if(stringcasecmp(ForceHash, "sha512") == 0) - ExpectedHash = HashString("SHA512", Parse.SHA512Hash()); - else if(stringcasecmp(ForceHash, "sha256") == 0) - ExpectedHash = HashString("SHA256", Parse.SHA256Hash()); - else if (stringcasecmp(ForceHash, "sha1") == 0) - ExpectedHash = HashString("SHA1", Parse.SHA1Hash()); - else - ExpectedHash = HashString("MD5Sum", Parse.MD5Hash()); - } - else - { - string Hash; - if ((Hash = Parse.SHA512Hash()).empty() == false) - ExpectedHash = HashString("SHA512", Hash); - else if ((Hash = Parse.SHA256Hash()).empty() == false) - ExpectedHash = HashString("SHA256", Hash); - else if ((Hash = Parse.SHA1Hash()).empty() == false) - ExpectedHash = HashString("SHA1", Hash); - else - ExpectedHash = HashString("MD5Sum", Parse.MD5Hash()); - } + ExpectedHashes = Parse.Hashes(); + if (PkgFile.empty() == true) return _error->Error(_("The package index files are corrupted. No Filename: " "field for package %s."), @@ -2106,7 +2484,11 @@ bool pkgAcqArchive::QueueNext() if ((unsigned long long)Buf.st_size > Version->Size) unlink(DestFile.c_str()); else + { PartialSize = Buf.st_size; + std::string SandboxUser = _config->Find("APT::Sandbox::User"); + ChangeOwnerAndPermissionOfFile("pkgAcqArchive::QueueNext",DestFile.c_str(), SandboxUser.c_str(), "root", 0600); + } } // Disables download of archives - useful if no real installation follows, @@ -2133,10 +2515,10 @@ bool pkgAcqArchive::QueueNext() // AcqArchive::Done - Finished fetching /*{{{*/ // --------------------------------------------------------------------- /* */ -void pkgAcqArchive::Done(string Message,unsigned long long Size,string CalcHash, +void pkgAcqArchive::Done(string Message,unsigned long long Size, HashStringList const &CalcHashes, pkgAcquire::MethodConfig *Cfg) { - Item::Done(Message,Size,CalcHash,Cfg); + Item::Done(Message, Size, CalcHashes, Cfg); // Check the size if (Size != Version->Size) @@ -2144,11 +2526,12 @@ void pkgAcqArchive::Done(string Message,unsigned long long Size,string CalcHash, RenameOnError(SizeMismatch); return; } - - // Check the hash - if(ExpectedHash.toStr() != CalcHash) + + // FIXME: could this empty() check impose *any* sort of security issue? + if(ExpectedHashes.usable() && ExpectedHashes != CalcHashes) { RenameOnError(HashSumMismatch); + printHashSumComparision(DestFile, ExpectedHashes, CalcHashes); return; } @@ -2161,21 +2544,20 @@ void pkgAcqArchive::Done(string Message,unsigned long long Size,string CalcHash, return; } - Complete = true; - // Reference filename if (FileName != DestFile) { StoreFilename = DestFile = FileName; Local = true; + Complete = true; return; } - + // Done, move it into position string FinalFile = _config->FindDir("Dir::Cache::Archives"); FinalFile += flNotDir(StoreFilename); Rename(DestFile,FinalFile); - + ChangeOwnerAndPermissionOfFile("pkgAcqArchive::Done", FinalFile.c_str(), "root", "root", 0644); StoreFilename = DestFile = FinalFile; Complete = true; } @@ -2220,7 +2602,7 @@ void pkgAcqArchive::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*}}}*/ // AcqArchive::IsTrusted - Determine whether this archive comes from a trusted source /*{{{*/ // --------------------------------------------------------------------- -APT_PURE bool pkgAcqArchive::IsTrusted() +APT_PURE bool pkgAcqArchive::IsTrusted() const { return Trusted; } @@ -2239,11 +2621,11 @@ void pkgAcqArchive::Finished() // AcqFile::pkgAcqFile - Constructor /*{{{*/ // --------------------------------------------------------------------- /* The file is added to the queue */ -pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string Hash, +pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI, HashStringList const &Hashes, unsigned long long Size,string Dsc,string ShortDesc, const string &DestDir, const string &DestFilename, bool IsIndexFile) : - Item(Owner), ExpectedHash(Hash), IsIndexFile(IsIndexFile) + Item(Owner, Hashes), IsIndexFile(IsIndexFile) { Retries = _config->FindI("Acquire::Retries",0); @@ -2271,7 +2653,11 @@ pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string Hash, if ((Size > 0) && (unsigned long long)Buf.st_size > Size) unlink(DestFile.c_str()); else + { PartialSize = Buf.st_size; + std::string SandboxUser = _config->Find("APT::Sandbox::User"); + ChangeOwnerAndPermissionOfFile("pkgAcqFile", DestFile.c_str(), SandboxUser.c_str(), "root", 0600); + } } QueueURI(Desc); @@ -2280,15 +2666,16 @@ pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string Hash, // AcqFile::Done - Item downloaded OK /*{{{*/ // --------------------------------------------------------------------- /* */ -void pkgAcqFile::Done(string Message,unsigned long long Size,string CalcHash, +void pkgAcqFile::Done(string Message,unsigned long long Size,HashStringList const &CalcHashes, pkgAcquire::MethodConfig *Cnf) { - Item::Done(Message,Size,CalcHash,Cnf); + Item::Done(Message,Size,CalcHashes,Cnf); // Check the hash - if(!ExpectedHash.empty() && ExpectedHash.toStr() != CalcHash) + if(ExpectedHashes.usable() && ExpectedHashes != CalcHashes) { RenameOnError(HashSumMismatch); + printHashSumComparision(DestFile, ExpectedHashes, CalcHashes); return; } @@ -2359,7 +2746,7 @@ void pkgAcqFile::Failed(string Message,pkgAcquire::MethodConfig *Cnf) // AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/ // --------------------------------------------------------------------- /* The only header we use is the last-modified header. */ -string pkgAcqFile::Custom600Headers() +string pkgAcqFile::Custom600Headers() const { if (IsIndexFile) return "\nIndex-File: true"; |