// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: indexcopy.cc,v 1.10 2002/03/26 07:38:58 jgg Exp $ /* ###################################################################### Index Copying - Aid for copying and verifying the index files This class helps apt-cache reconstruct a damaged index files. ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ #include<config.h> #include <apt-pkg/error.h> #include <apt-pkg/progress.h> #include <apt-pkg/strutl.h> #include <apt-pkg/fileutl.h> #include <apt-pkg/aptconfiguration.h> #include <apt-pkg/configuration.h> #include <apt-pkg/tagfile.h> #include <apt-pkg/indexrecords.h> #include <apt-pkg/md5.h> #include <apt-pkg/cdrom.h> #include <iostream> #include <sstream> #include <unistd.h> #include <sys/stat.h> #include <sys/types.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include "indexcopy.h" #include <apti18n.h> /*}}}*/ using namespace std; // IndexCopy::CopyPackages - Copy the package files from the CD /*{{{*/ // --------------------------------------------------------------------- /* */ bool IndexCopy::CopyPackages(string CDROM,string Name,vector<string> &List, pkgCdromStatus *log) { OpProgress *Progress = NULL; if (List.empty() == true) return true; if(log) Progress = log->GetOpProgress(); bool NoStat = _config->FindB("APT::CDROM::Fast",false); bool Debug = _config->FindB("Debug::aptcdrom",false); // Prepare the progress indicator off_t TotalSize = 0; std::vector<APT::Configuration::Compressor> const compressor = APT::Configuration::getCompressors(); for (vector<string>::iterator I = List.begin(); I != List.end(); ++I) { struct stat Buf; bool found = false; std::string file = std::string(*I).append(GetFileName()); for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressor.begin(); c != compressor.end(); ++c) { if (stat(std::string(file + c->Extension).c_str(), &Buf) != 0) continue; found = true; break; } if (found == false) return _error->Errno("stat", "Stat failed for %s", file.c_str()); TotalSize += Buf.st_size; } off_t CurrentSize = 0; unsigned int NotFound = 0; unsigned int WrongSize = 0; unsigned int Packages = 0; for (vector<string>::iterator I = List.begin(); I != List.end(); ++I) { string OrigPath = string(*I,CDROM.length()); // Open the package file FileFd Pkg(*I + GetFileName(), FileFd::ReadOnly, FileFd::Extension); off_t const FileSize = Pkg.Size(); pkgTagFile Parser(&Pkg); if (_error->PendingError() == true) return false; // Open the output file char S[400]; snprintf(S,sizeof(S),"cdrom:[%s]/%s%s",Name.c_str(), (*I).c_str() + CDROM.length(),GetFileName()); string TargetF = _config->FindDir("Dir::State::lists") + "partial/"; TargetF += URItoFileName(S); FileFd Target; if (_config->FindB("APT::CDROM::NoAct",false) == true) { TargetF = "/dev/null"; Target.Open(TargetF,FileFd::WriteExists); } else { Target.Open(TargetF,FileFd::WriteAtomic); } FILE *TargetFl = fdopen(dup(Target.Fd()),"w"); if (_error->PendingError() == true) return false; if (TargetFl == 0) return _error->Errno("fdopen","Failed to reopen fd"); // Setup the progress meter if(Progress) Progress->OverallProgress(CurrentSize,TotalSize,FileSize, string("Reading ") + Type() + " Indexes"); // Parse if(Progress) Progress->SubProgress(Pkg.Size()); pkgTagSection Section; this->Section = &Section; string Prefix; unsigned long Hits = 0; unsigned long Chop = 0; while (Parser.Step(Section) == true) { if(Progress) Progress->Progress(Parser.Offset()); string File; unsigned long long Size; if (GetFile(File,Size) == false) { fclose(TargetFl); return false; } if (Chop != 0) File = OrigPath + ChopDirs(File,Chop); // See if the file exists bool Mangled = false; if (NoStat == false || Hits < 10) { // Attempt to fix broken structure if (Hits == 0) { if (ReconstructPrefix(Prefix,OrigPath,CDROM,File) == false && ReconstructChop(Chop,*I,File) == false) { if (Debug == true) clog << "Missed: " << File << endl; NotFound++; continue; } if (Chop != 0) File = OrigPath + ChopDirs(File,Chop); } // Get the size struct stat Buf; if (stat(string(CDROM + Prefix + File).c_str(),&Buf) != 0 || Buf.st_size == 0) { // Attempt to fix busted symlink support for one instance string OrigFile = File; string::size_type Start = File.find("binary-"); string::size_type End = File.find("/",Start+3); if (Start != string::npos && End != string::npos) { File.replace(Start,End-Start,"binary-all"); Mangled = true; } if (Mangled == false || stat(string(CDROM + Prefix + File).c_str(),&Buf) != 0) { if (Debug == true) clog << "Missed(2): " << OrigFile << endl; NotFound++; continue; } } // Size match if ((unsigned long long)Buf.st_size != Size) { if (Debug == true) clog << "Wrong Size: " << File << endl; WrongSize++; continue; } } Packages++; Hits++; if (RewriteEntry(TargetFl,File) == false) { fclose(TargetFl); return false; } } fclose(TargetFl); if (Debug == true) cout << " Processed by using Prefix '" << Prefix << "' and chop " << Chop << endl; if (_config->FindB("APT::CDROM::NoAct",false) == false) { // Move out of the partial directory Target.Close(); string FinalF = _config->FindDir("Dir::State::lists"); FinalF += URItoFileName(S); if (rename(TargetF.c_str(),FinalF.c_str()) != 0) return _error->Errno("rename","Failed to rename"); } /* Mangle the source to be in the proper notation with prefix dist [component] */ *I = string(*I,Prefix.length()); ConvertToSourceList(CDROM,*I); *I = Prefix + ' ' + *I; CurrentSize += FileSize; } if(Progress) Progress->Done(); // Some stats if(log) { stringstream msg; if(NotFound == 0 && WrongSize == 0) ioprintf(msg, _("Wrote %i records.\n"), Packages); else if (NotFound != 0 && WrongSize == 0) ioprintf(msg, _("Wrote %i records with %i missing files.\n"), Packages, NotFound); else if (NotFound == 0 && WrongSize != 0) ioprintf(msg, _("Wrote %i records with %i mismatched files\n"), Packages, WrongSize); if (NotFound != 0 && WrongSize != 0) ioprintf(msg, _("Wrote %i records with %i missing files and %i mismatched files\n"), Packages, NotFound, WrongSize); } if (Packages == 0) _error->Warning("No valid records were found."); if (NotFound + WrongSize > 10) _error->Warning("A lot of entries were discarded, something may be wrong.\n"); return true; } /*}}}*/ // IndexCopy::ChopDirs - Chop off the leading directory components /*{{{*/ // --------------------------------------------------------------------- /* */ string IndexCopy::ChopDirs(string Path,unsigned int Depth) { string::size_type I = 0; do { I = Path.find('/',I+1); Depth--; } while (I != string::npos && Depth != 0); if (I == string::npos) return string(); return string(Path,I+1); } /*}}}*/ // IndexCopy::ReconstructPrefix - Fix strange prefixing /*{{{*/ // --------------------------------------------------------------------- /* This prepends dir components from the path to the package files to the path to the deb until it is found */ bool IndexCopy::ReconstructPrefix(string &Prefix,string OrigPath,string CD, string File) { bool Debug = _config->FindB("Debug::aptcdrom",false); unsigned int Depth = 1; string MyPrefix = Prefix; while (1) { struct stat Buf; if (stat(string(CD + MyPrefix + File).c_str(),&Buf) != 0) { if (Debug == true) cout << "Failed, " << CD + MyPrefix + File << endl; if (GrabFirst(OrigPath,MyPrefix,Depth++) == true) continue; return false; } else { Prefix = MyPrefix; return true; } } return false; } /*}}}*/ // IndexCopy::ReconstructChop - Fixes bad source paths /*{{{*/ // --------------------------------------------------------------------- /* This removes path components from the filename and prepends the location of the package files until a file is found */ bool IndexCopy::ReconstructChop(unsigned long &Chop,string Dir,string File) { // Attempt to reconstruct the filename unsigned long Depth = 0; while (1) { struct stat Buf; if (stat(string(Dir + File).c_str(),&Buf) != 0) { File = ChopDirs(File,1); Depth++; if (File.empty() == false) continue; return false; } else { Chop = Depth; return true; } } return false; } /*}}}*/ // IndexCopy::ConvertToSourceList - Convert a Path to a sourcelist /*{{{*/ // --------------------------------------------------------------------- /* We look for things in dists/ notation and convert them to <dist> <component> form otherwise it is left alone. This also strips the CD path. This implements a regex sort of like: (.*)/dists/([^/]*)/(.*)/binary-* ^ ^ ^- Component | |-------- Distribution |------------------- Path It was deciced to use only a single word for dist (rather than say unstable/non-us) to increase the chance that each CD gets a single line in sources.list. */ void IndexCopy::ConvertToSourceList(string CD,string &Path) { char S[300]; snprintf(S,sizeof(S),"binary-%s",_config->Find("Apt::Architecture").c_str()); // Strip the cdrom base path Path = string(Path,CD.length()); if (Path.empty() == true) Path = "/"; // Too short to be a dists/ type if (Path.length() < strlen("dists/")) return; // Not a dists type. if (stringcmp(Path.c_str(),Path.c_str()+strlen("dists/"),"dists/") != 0) return; // Isolate the dist string::size_type Slash = strlen("dists/"); string::size_type Slash2 = Path.find('/',Slash + 1); if (Slash2 == string::npos || Slash2 + 2 >= Path.length()) return; string Dist = string(Path,Slash,Slash2 - Slash); // Isolate the component Slash = Slash2; for (unsigned I = 0; I != 10; I++) { Slash = Path.find('/',Slash+1); if (Slash == string::npos || Slash + 2 >= Path.length()) return; string Comp = string(Path,Slash2+1,Slash - Slash2-1); // Verify the trailing binary- bit string::size_type BinSlash = Path.find('/',Slash + 1); if (Slash == string::npos) return; string Binary = string(Path,Slash+1,BinSlash - Slash-1); if (Binary != S && Binary != "source") continue; Path = Dist + ' ' + Comp; return; } } /*}}}*/ // IndexCopy::GrabFirst - Return the first Depth path components /*{{{*/ // --------------------------------------------------------------------- /* */ bool IndexCopy::GrabFirst(string Path,string &To,unsigned int Depth) { string::size_type I = 0; do { I = Path.find('/',I+1); Depth--; } while (I != string::npos && Depth != 0); if (I == string::npos) return false; To = string(Path,0,I+1); return true; } /*}}}*/ // PackageCopy::GetFile - Get the file information from the section /*{{{*/ // --------------------------------------------------------------------- /* */ bool PackageCopy::GetFile(string &File,unsigned long long &Size) { File = Section->FindS("Filename"); Size = Section->FindI("Size"); if (File.empty() || Size == 0) return _error->Error("Cannot find filename or size tag"); return true; } /*}}}*/ // PackageCopy::RewriteEntry - Rewrite the entry with a new filename /*{{{*/ // --------------------------------------------------------------------- /* */ bool PackageCopy::RewriteEntry(FILE *Target,string File) { TFRewriteData Changes[] = {{"Filename",File.c_str()}, {}}; if (TFRewrite(Target,*Section,TFRewritePackageOrder,Changes) == false) return false; fputc('\n',Target); return true; } /*}}}*/ // SourceCopy::GetFile - Get the file information from the section /*{{{*/ // --------------------------------------------------------------------- /* */ bool SourceCopy::GetFile(string &File,unsigned long long &Size) { string Files = Section->FindS("Files"); if (Files.empty() == true) return false; // Stash the / terminated directory prefix string Base = Section->FindS("Directory"); if (Base.empty() == false && Base[Base.length()-1] != '/') Base += '/'; // Read the first file triplet const char *C = Files.c_str(); string sSize; string MD5Hash; // Parse each of the elements if (ParseQuoteWord(C,MD5Hash) == false || ParseQuoteWord(C,sSize) == false || ParseQuoteWord(C,File) == false) return _error->Error("Error parsing file record"); // Parse the size and append the directory Size = strtoull(sSize.c_str(), NULL, 10); File = Base + File; return true; } /*}}}*/ // SourceCopy::RewriteEntry - Rewrite the entry with a new filename /*{{{*/ // --------------------------------------------------------------------- /* */ bool SourceCopy::RewriteEntry(FILE *Target,string File) { string Dir(File,0,File.rfind('/')); TFRewriteData Changes[] = {{"Directory",Dir.c_str()}, {}}; if (TFRewrite(Target,*Section,TFRewriteSourceOrder,Changes) == false) return false; fputc('\n',Target); return true; } /*}}}*/ // SigVerify::Verify - Verify a files md5sum against its metaindex /*{{{*/ // --------------------------------------------------------------------- /* */ bool SigVerify::Verify(string prefix, string file, indexRecords *MetaIndex) { const indexRecords::checkSum *Record = MetaIndex->Lookup(file); // we skip non-existing files in the verifcation to support a cdrom // with no Packages file (just a Package.gz), see LP: #255545 // (non-existing files are not considered a error) if(!RealFileExists(prefix+file)) { _error->Warning(_("Skipping nonexistent file %s"), string(prefix+file).c_str()); return true; } if (!Record) { _error->Warning(_("Can't find authentication record for: %s"), file.c_str()); return false; } if (!Record->Hash.VerifyFile(prefix+file)) { _error->Warning(_("Hash mismatch for: %s"),file.c_str()); return false; } if(_config->FindB("Debug::aptcdrom",false)) { cout << "File: " << prefix+file << endl; cout << "Expected Hash " << Record->Hash.toStr() << endl; } return true; } /*}}}*/ bool SigVerify::CopyMetaIndex(string CDROM, string CDName, /*{{{*/ string prefix, string file) { char S[400]; snprintf(S,sizeof(S),"cdrom:[%s]/%s%s",CDName.c_str(), (prefix).c_str() + CDROM.length(),file.c_str()); string TargetF = _config->FindDir("Dir::State::lists"); TargetF += URItoFileName(S); FileFd Target; FileFd Rel; Target.Open(TargetF,FileFd::WriteAtomic); Rel.Open(prefix + file,FileFd::ReadOnly); if (_error->PendingError() == true) return false; if (CopyFile(Rel,Target) == false) return false; return true; } /*}}}*/ bool SigVerify::CopyAndVerify(string CDROM,string Name,vector<string> &SigList, /*{{{*/ vector<string> PkgList,vector<string> SrcList) { if (SigList.empty() == true) return true; bool Debug = _config->FindB("Debug::aptcdrom",false); // Read all Release files for (vector<string>::iterator I = SigList.begin(); I != SigList.end(); ++I) { if(Debug) cout << "Signature verify for: " << *I << endl; indexRecords *MetaIndex = new indexRecords; string prefix = *I; string const releasegpg = *I+"Release.gpg"; string const release = *I+"Release"; string const inrelease = *I+"InRelease"; bool useInRelease = true; // a Release.gpg without a Release should never happen if (RealFileExists(inrelease) == true) ; else if(RealFileExists(release) == false || RealFileExists(releasegpg) == false) { delete MetaIndex; continue; } else useInRelease = false; pid_t pid = ExecFork(); if(pid < 0) { _error->Error("Fork failed"); return false; } if(pid == 0) { if (useInRelease == true) RunGPGV(inrelease, inrelease); else RunGPGV(release, releasegpg); } if(!ExecWait(pid, "gpgv")) { _error->Warning("Signature verification failed for: %s", (useInRelease ? inrelease.c_str() : releasegpg.c_str())); // something went wrong, don't copy the Release.gpg // FIXME: delete any existing gpg file? continue; } // Open the Release file and add it to the MetaIndex if(!MetaIndex->Load(release)) { _error->Error("%s",MetaIndex->ErrorText.c_str()); return false; } // go over the Indexfiles and see if they verify // if so, remove them from our copy of the lists vector<string> keys = MetaIndex->MetaKeys(); for (vector<string>::iterator I = keys.begin(); I != keys.end(); ++I) { if(!Verify(prefix,*I, MetaIndex)) { // something went wrong, don't copy the Release.gpg // FIXME: delete any existing gpg file? _error->Discard(); continue; } } // we need a fresh one for the Release.gpg delete MetaIndex; // everything was fine, copy the Release and Release.gpg file if (useInRelease == true) CopyMetaIndex(CDROM, Name, prefix, "InRelease"); else { CopyMetaIndex(CDROM, Name, prefix, "Release"); CopyMetaIndex(CDROM, Name, prefix, "Release.gpg"); } } return true; } /*}}}*/ // SigVerify::RunGPGV - returns the command needed for verify /*{{{*/ // --------------------------------------------------------------------- /* Generating the commandline for calling gpgv is somehow complicated as we need to add multiple keyrings and user supplied options. Also, as the cdrom code currently can not use the gpgv method we have two places these need to be done - so the place for this method is wrong but better than code duplication… */ bool SigVerify::RunGPGV(std::string const &File, std::string const &FileGPG, int const &statusfd, int fd[2]) { if (File == FileGPG) { #define SIGMSG "-----BEGIN PGP SIGNED MESSAGE-----\n" char buffer[sizeof(SIGMSG)]; FILE* gpg = fopen(File.c_str(), "r"); if (gpg == NULL) return _error->Errno("RunGPGV", _("Could not open file %s"), File.c_str()); char const * const test = fgets(buffer, sizeof(buffer), gpg); fclose(gpg); if (test == NULL || strcmp(buffer, SIGMSG) != 0) return _error->Error(_("File %s doesn't start with a clearsigned message"), File.c_str()); #undef SIGMSG } string const gpgvpath = _config->Find("Dir::Bin::gpg", "/usr/bin/gpgv"); // FIXME: remove support for deprecated APT::GPGV setting string const trustedFile = _config->Find("APT::GPGV::TrustedKeyring", _config->FindFile("Dir::Etc::Trusted")); string const trustedPath = _config->FindDir("Dir::Etc::TrustedParts"); bool const Debug = _config->FindB("Debug::Acquire::gpgv", false); if (Debug == true) { std::clog << "gpgv path: " << gpgvpath << std::endl; std::clog << "Keyring file: " << trustedFile << std::endl; std::clog << "Keyring path: " << trustedPath << std::endl; } std::vector<string> keyrings; if (DirectoryExists(trustedPath)) keyrings = GetListOfFilesInDir(trustedPath, "gpg", false, true); if (RealFileExists(trustedFile) == true) keyrings.push_back(trustedFile); std::vector<const char *> Args; Args.reserve(30); if (keyrings.empty() == true) { // TRANSLATOR: %s is the trusted keyring parts directory return _error->Error(_("No keyring installed in %s."), _config->FindDir("Dir::Etc::TrustedParts").c_str()); } Args.push_back(gpgvpath.c_str()); Args.push_back("--ignore-time-conflict"); if (statusfd != -1) { Args.push_back("--status-fd"); char fd[10]; snprintf(fd, sizeof(fd), "%i", statusfd); Args.push_back(fd); } for (vector<string>::const_iterator K = keyrings.begin(); K != keyrings.end(); ++K) { Args.push_back("--keyring"); Args.push_back(K->c_str()); } Configuration::Item const *Opts; Opts = _config->Tree("Acquire::gpgv::Options"); if (Opts != 0) { Opts = Opts->Child; for (; Opts != 0; Opts = Opts->Next) { if (Opts->Value.empty() == true) continue; Args.push_back(Opts->Value.c_str()); } } Args.push_back(FileGPG.c_str()); if (FileGPG != File) Args.push_back(File.c_str()); Args.push_back(NULL); if (Debug == true) { std::clog << "Preparing to exec: " << gpgvpath; for (std::vector<const char *>::const_iterator a = Args.begin(); *a != NULL; ++a) std::clog << " " << *a; std::clog << std::endl; } if (statusfd != -1) { int const nullfd = open("/dev/null", O_RDONLY); close(fd[0]); // Redirect output to /dev/null; we read from the status fd dup2(nullfd, STDOUT_FILENO); dup2(nullfd, STDERR_FILENO); // Redirect the pipe to the status fd (3) dup2(fd[1], statusfd); putenv((char *)"LANG="); putenv((char *)"LC_ALL="); putenv((char *)"LC_MESSAGES="); } execvp(gpgvpath.c_str(), (char **) &Args[0]); return true; } /*}}}*/ bool TranslationsCopy::CopyTranslations(string CDROM,string Name, /*{{{*/ vector<string> &List, pkgCdromStatus *log) { OpProgress *Progress = NULL; if (List.empty() == true) return true; if(log) Progress = log->GetOpProgress(); bool Debug = _config->FindB("Debug::aptcdrom",false); // Prepare the progress indicator off_t TotalSize = 0; std::vector<APT::Configuration::Compressor> const compressor = APT::Configuration::getCompressors(); for (vector<string>::iterator I = List.begin(); I != List.end(); ++I) { struct stat Buf; bool found = false; std::string file = *I; for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressor.begin(); c != compressor.end(); ++c) { if (stat(std::string(file + c->Extension).c_str(), &Buf) != 0) continue; found = true; break; } if (found == false) return _error->Errno("stat", "Stat failed for %s", file.c_str()); TotalSize += Buf.st_size; } off_t CurrentSize = 0; unsigned int NotFound = 0; unsigned int WrongSize = 0; unsigned int Packages = 0; for (vector<string>::iterator I = List.begin(); I != List.end(); ++I) { string OrigPath = string(*I,CDROM.length()); // Open the package file FileFd Pkg(*I, FileFd::ReadOnly, FileFd::Extension); off_t const FileSize = Pkg.Size(); pkgTagFile Parser(&Pkg); if (_error->PendingError() == true) return false; // Open the output file char S[400]; snprintf(S,sizeof(S),"cdrom:[%s]/%s",Name.c_str(), (*I).c_str() + CDROM.length()); string TargetF = _config->FindDir("Dir::State::lists") + "partial/"; TargetF += URItoFileName(S); if (_config->FindB("APT::CDROM::NoAct",false) == true) TargetF = "/dev/null"; FileFd Target(TargetF,FileFd::WriteAtomic); FILE *TargetFl = fdopen(dup(Target.Fd()),"w"); if (_error->PendingError() == true) return false; if (TargetFl == 0) return _error->Errno("fdopen","Failed to reopen fd"); // Setup the progress meter if(Progress) Progress->OverallProgress(CurrentSize,TotalSize,FileSize, string("Reading Translation Indexes")); // Parse if(Progress) Progress->SubProgress(Pkg.Size()); pkgTagSection Section; this->Section = &Section; string Prefix; unsigned long Hits = 0; while (Parser.Step(Section) == true) { if(Progress) Progress->Progress(Parser.Offset()); const char *Start; const char *Stop; Section.GetSection(Start,Stop); fwrite(Start,Stop-Start, 1, TargetFl); fputc('\n',TargetFl); Packages++; Hits++; } fclose(TargetFl); if (Debug == true) cout << " Processed by using Prefix '" << Prefix << "' and chop " << endl; if (_config->FindB("APT::CDROM::NoAct",false) == false) { // Move out of the partial directory Target.Close(); string FinalF = _config->FindDir("Dir::State::lists"); FinalF += URItoFileName(S); if (rename(TargetF.c_str(),FinalF.c_str()) != 0) return _error->Errno("rename","Failed to rename"); } CurrentSize += FileSize; } if(Progress) Progress->Done(); // Some stats if(log) { stringstream msg; if(NotFound == 0 && WrongSize == 0) ioprintf(msg, _("Wrote %i records.\n"), Packages); else if (NotFound != 0 && WrongSize == 0) ioprintf(msg, _("Wrote %i records with %i missing files.\n"), Packages, NotFound); else if (NotFound == 0 && WrongSize != 0) ioprintf(msg, _("Wrote %i records with %i mismatched files\n"), Packages, WrongSize); if (NotFound != 0 && WrongSize != 0) ioprintf(msg, _("Wrote %i records with %i missing files and %i mismatched files\n"), Packages, NotFound, WrongSize); } if (Packages == 0) _error->Warning("No valid records were found."); if (NotFound + WrongSize > 10) _error->Warning("A lot of entries were discarded, something may be wrong.\n"); return true; } /*}}}*/