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really do not download Release if InRelease does not verify
[apt.git] / apt-pkg / acquire-item.cc
diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc
index d6b00f9b7b7b57747a698a5edeb1d851fe474783..3c66369cf8bcbbbecd5176360ef79645ef9f380e 100644 (file)
--- a/apt-pkg/acquire-item.cc
+++ b/apt-pkg/acquire-item.cc
@@ -527,6 +527,21 @@ void pkgAcqDiffIndex::Done(string Message,unsigned long long Size,HashStringList
 
    Item::Done(Message, Size, Hashes, 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);
 
    string FinalFile;
    FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI);
 
@@ -627,7 +642,9 @@ void pkgAcqIndexDiffs::Finish(bool allDone)
       // this happens if we have a up-to-date indexfile
       if(!FileExists(PartialFile))
          PartialFile = DestFile;
       // this happens if we have a up-to-date indexfile
       if(!FileExists(PartialFile))
          PartialFile = DestFile;
-      
+
+      TransactionManager->TransactionStageCopy(this, PartialFile, DestFile);
+
       // this is for the "real" finish
       Complete = true;
       Status = StatDone;
       // this is for the "real" finish
       Complete = true;
       Status = StatDone;
@@ -713,6 +730,8 @@ void pkgAcqIndexDiffs::Done(string Message,unsigned long long Size, HashStringLi
 
    Item::Done(Message, Size, Hashes, Cnf);
 
 
    Item::Done(Message, Size, Hashes, Cnf);
 
+   // FIXME: verify this download too before feeding it to rred
+
    string FinalFile;
    FinalFile = _config->FindDir("Dir::State::lists")+"partial/"+URItoFileName(RealURI);
 
    string FinalFile;
    FinalFile = _config->FindDir("Dir::State::lists")+"partial/"+URItoFileName(RealURI);
 
@@ -834,6 +853,8 @@ void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,HashStri
 
    Item::Done(Message,Size,Hashes,Cnf);
 
 
    Item::Done(Message,Size,Hashes,Cnf);
 
+   // FIXME: verify download before feeding it to rred
+
    string const FinalFile = _config->FindDir("Dir::State::lists") + "partial/" + URItoFileName(RealURI);
 
    if (State == StateFetchDiff)
    string const FinalFile = _config->FindDir("Dir::State::lists") + "partial/" + URItoFileName(RealURI);
 
    if (State == StateFetchDiff)
@@ -892,8 +913,7 @@ void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,HashStri
                   << DestFile << " -> " << FinalFile << std::endl;
 
       // queue for copy by the transaction manager
                   << DestFile << " -> " << FinalFile << std::endl;
 
       // queue for copy by the transaction manager
-      PartialFile = DestFile;
-      DestFile = FinalFile;
+      TransactionManager->TransactionStageCopy(this, DestFile, FinalFile);
 
       // ensure the ed's are gone regardless of list-cleanup
       for (std::vector<pkgAcqIndexMergeDiffs *>::const_iterator I = allPatches->begin();
 
       // ensure the ed's are gone regardless of list-cleanup
       for (std::vector<pkgAcqIndexMergeDiffs *>::const_iterator I = allPatches->begin();
@@ -913,6 +933,23 @@ void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,HashStri
    }
 }
                                                                        /*}}}*/
    }
 }
                                                                        /*}}}*/
+
+// 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 
 // AcqIndex::AcqIndex - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* The package file is added to the queue and a second class is 
@@ -920,8 +957,10 @@ void pkgAcqIndexMergeDiffs::Done(string Message,unsigned long long Size,HashStri
 pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
                         string URI,string URIDesc,string ShortDesc,
                         HashStringList const  &ExpectedHash)
 pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
                         string URI,string URIDesc,string ShortDesc,
                         HashStringList const  &ExpectedHash)
-   : pkgAcqBaseIndex(Owner, 0, NULL, ExpectedHash, NULL), RealURI(URI)
+   : pkgAcqBaseIndex(Owner, 0, NULL, ExpectedHash, NULL)
 {
 {
+   RealURI = URI;
+
    AutoSelectCompression();
    Init(URI, URIDesc, ShortDesc);
 
    AutoSelectCompression();
    Init(URI, URIDesc, ShortDesc);
 
@@ -938,8 +977,10 @@ pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
                         HashStringList const &ExpectedHash, 
                          indexRecords *MetaIndexParser)
    : pkgAcqBaseIndex(Owner, TransactionManager, Target, ExpectedHash, 
                         HashStringList const &ExpectedHash, 
                          indexRecords *MetaIndexParser)
    : pkgAcqBaseIndex(Owner, TransactionManager, Target, ExpectedHash, 
-                     MetaIndexParser), RealURI(Target->URI)
+                     MetaIndexParser)
 {
 {
+   RealURI = Target->URI;
+
    // autoselect the compression method
    AutoSelectCompression();
    Init(Target->URI, Target->Description, Target->ShortDesc);
    // autoselect the compression method
    AutoSelectCompression();
    Init(Target->URI, Target->Description, Target->ShortDesc);
@@ -954,34 +995,38 @@ pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
 void pkgAcqIndex::AutoSelectCompression()
 {
    std::vector<std::string> types = APT::Configuration::getCompressionTypes();
 void pkgAcqIndex::AutoSelectCompression()
 {
    std::vector<std::string> types = APT::Configuration::getCompressionTypes();
-   CompressionExtension = "";
+   CompressionExtensions = "";
    if (ExpectedHashes.usable())
    {
    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)
    }
    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);
+   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)
 {
 }
 // AcqIndex::Init - defered Constructor                                        /*{{{*/
 // ---------------------------------------------------------------------
 void pkgAcqIndex::Init(string const &URI, string const &URIDesc, 
                        string const &ShortDesc)
 {
-   Decompression = false;
-   Erase = false;
+   Stage = STAGE_DOWNLOAD;
 
    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
    DestFile += URItoFileName(URI);
 
 
    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
    DestFile += URItoFileName(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;
       if(Target)
    {
       Desc.URI = URI;
       if(Target)
@@ -989,10 +1034,10 @@ void pkgAcqIndex::Init(string const &URI, string const &URIDesc,
    }
    else
    {
    }
    else
    {
-      Desc.URI = URI + '.' + comprExt;
-      DestFile = DestFile + '.' + comprExt;
+      Desc.URI = URI + '.' + CurrentCompressionExtension;
+      DestFile = DestFile + '.' + CurrentCompressionExtension;
       if(Target)
       if(Target)
-         MetaKey = string(Target->MetaKey) + '.' + comprExt;
+         MetaKey = string(Target->MetaKey) + '.' + CurrentCompressionExtension;
    }
 
    // load the filesize
    }
 
    // load the filesize
@@ -1064,19 +1109,18 @@ string pkgAcqIndex::Custom600Headers() const
 /* */
 void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
 {
 /* */
 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)
    {
    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/
       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);
    }
 
    Item::Failed(Message,Cnf);
@@ -1090,11 +1134,10 @@ void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)  /*{{{*/
 /* */
 std::string pkgAcqIndex::GetFinalFilename() const
 {
 /* */
 std::string pkgAcqIndex::GetFinalFilename() const
 {
-   std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' '));
    std::string FinalFile = _config->FindDir("Dir::State::lists");
    FinalFile += URItoFileName(RealURI);
    if (_config->FindB("Acquire::GzipIndexes",false) == true)
    std::string FinalFile = _config->FindDir("Dir::State::lists");
    FinalFile += URItoFileName(RealURI);
    if (_config->FindB("Acquire::GzipIndexes",false) == true)
-      FinalFile += '.' + compExt;
+      FinalFile += '.' + CurrentCompressionExtension;
    return FinalFile;
 }
                                                                        /*}}}*/
    return FinalFile;
 }
                                                                        /*}}}*/
@@ -1103,8 +1146,6 @@ std::string pkgAcqIndex::GetFinalFilename() const
 /* */
 void pkgAcqIndex::ReverifyAfterIMS()
 {
 /* */
 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 =  _config->FindDir("Dir::State::lists") + "partial/";
    // update destfile to *not* include the compression extension when doing
    // a reverify (as its uncompressed on disk already)
    DestFile =  _config->FindDir("Dir::State::lists") + "partial/";
@@ -1112,15 +1153,44 @@ void pkgAcqIndex::ReverifyAfterIMS()
 
    // adjust DestFile if its compressed on disk
    if (_config->FindB("Acquire::GzipIndexes",false) == true)
 
    // adjust DestFile if its compressed on disk
    if (_config->FindB("Acquire::GzipIndexes",false) == true)
-      DestFile += compExt;
+      DestFile += '.' + CurrentCompressionExtension;
 
    // copy FinalFile into partial/ so that we check the hash again
    string FinalFile = GetFinalFilename();
 
    // copy FinalFile into partial/ so that we check the hash again
    string FinalFile = GetFinalFilename();
-   Decompression = true;
+   Stage = STAGE_DECOMPRESS_AND_VERIFY;
    Desc.URI = "copy:" + FinalFile;
    QueueURI(Desc);
 }
                                                                        /*}}}*/
    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
 // AcqIndex::Done - Finished a fetch                                   /*{{{*/
 // ---------------------------------------------------------------------
 /* This goes through a number of states.. On the initial fetch the
@@ -1128,84 +1198,45 @@ void pkgAcqIndex::ReverifyAfterIMS()
    to the uncompressed version of the file. If this is so the file
    is copied into the partial directory. In all other cases the file
    is decompressed with a compressed uri. */
    to the uncompressed version of the file. If this is so the file
    is copied into the partial directory. In all other cases the file
    is decompressed with a compressed uri. */
-void pkgAcqIndex::Done(string Message, unsigned long long Size,
+void pkgAcqIndex::Done(string Message,
+                       unsigned long long Size,
                        HashStringList const &Hashes,
                       pkgAcquire::MethodConfig *Cfg)
 {
    Item::Done(Message,Size,Hashes,Cfg);
                        HashStringList const &Hashes,
                       pkgAcquire::MethodConfig *Cfg)
 {
    Item::Done(Message,Size,Hashes,Cfg);
-   std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' '));
 
 
-   if (Decompression == true)
+   switch(Stage) 
    {
    {
-      if (ExpectedHashes.usable() && ExpectedHashes != Hashes)
-      {
-         Desc.URI = RealURI;
-        RenameOnError(HashSumMismatch);
-        printHashSumComparision(RealURI, ExpectedHashes, Hashes);
-         Failed(Message, Cfg);
-         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 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)
-         {
-            RenameOnError(InvalidFormat);
-            Failed(Message, Cfg);
-            return;
-         }
-      }
-       
-      // FIXME: can we void the "Erase" bool here as its very non-local?
-      std::string CompressedFile = _config->FindDir("Dir::State::lists") + "partial/";
-      CompressedFile += URItoFileName(RealURI);
-
-      // Remove the compressed version.
-      if (Erase == true)
-        unlink(CompressedFile.c_str());
-
-      // Done, queue for rename on transaction finished
-      PartialFile = DestFile;
-      DestFile = GetFinalFilename();
-
-      return;
+      case STAGE_DOWNLOAD:
+         StageDownloadDone(Message, Hashes, Cfg);
+         break;
+      case STAGE_DECOMPRESS_AND_VERIFY:
+         StageDecompressDone(Message, Hashes, Cfg);
+         break;
    }
    }
-   
-   // FIXME: use the same method to find 
-   // check the compressed hash too
-   if(MetaKey != "" && Hashes.size() > 0)
+}
+
+// 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)
    {
    {
-      indexRecords::checkSum *Record = MetaIndexParser->Lookup(MetaKey);
-      if(Record && Record->Hashes.usable() && Hashes != Record->Hashes)
-      {
-         RenameOnError(HashSumMismatch);
-         printHashSumComparision(RealURI, Record->Hashes, Hashes);
-         Failed(Message, Cfg);
-         return;
-      }
+      RenameOnError(HashSumMismatch);
+      Failed(Message, Cfg);
+      return;
    }
 
    }
 
-   Erase = false;
    Complete = true;
    
    // Handle the unzipd case
    string FileName = LookupTag(Message,"Alt-Filename");
    if (FileName.empty() == 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;
       Local = true;
       DestFile += ".decomp";
       Desc.URI = "copy:" + FileName;
@@ -1229,43 +1260,35 @@ void pkgAcqIndex::Done(string Message, unsigned long long Size,
       ErrorText = "Method gave a blank filename";
    }
 
       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;
       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, reverify by copy into partial/
-   if (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)
    {
    {
-      Erase = false;
-      ReverifyAfterIMS();
-#if 0 // ???
-      // 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);
-#endif
+      // The files timestamp matches, reverify by copy into partial/
+      EraseFileName = "";
+      ReverifyAfterIMS();
       return;
    }
       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))
    {
    if (_config->FindB("Acquire::GzipIndexes",false))
    {
-      DestFile = _config->FindDir("Dir::State::lists");
-      DestFile += URItoFileName(RealURI) + '.' + compExt;
-
-      Decompression = true;
+      DestFile = _config->FindDir("Dir::State::lists") + "partial/";
+      DestFile += URItoFileName(RealURI) + '.' + CurrentCompressionExtension;
+      EraseFileName = "";
+      Stage = STAGE_DECOMPRESS_AND_VERIFY;
       Desc.URI = "copy:" + FileName;
       QueueURI(Desc);
 
       Desc.URI = "copy:" + FileName;
       QueueURI(Desc);
 
@@ -1273,16 +1296,19 @@ void pkgAcqIndex::Done(string Message, unsigned long long Size,
     }
 
    // get the binary name for your used compression type
     }
 
    // 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";
       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;
    }
 
       return;
    }
 
-   Decompression = true;
+   // queue uri for the next stage
+   Stage = STAGE_DECOMPRESS_AND_VERIFY;
    DestFile += ".decomp";
    Desc.URI = decompProg + ":" + FileName;
    QueueURI(Desc);
    DestFile += ".decomp";
    Desc.URI = decompProg + ":" + FileName;
    QueueURI(Desc);
@@ -1297,6 +1323,37 @@ void pkgAcqIndex::Done(string Message, unsigned long long Size,
        #pragma GCC diagnostic pop
 #endif
 }
        #pragma GCC diagnostic pop
 #endif
 }
+                                                                        /*}}}*/
+// 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;
+   }
+
+   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                       /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // AcqIndexTrans::pkgAcqIndexTrans - Constructor                       /*{{{*/
 // ---------------------------------------------------------------------
@@ -1337,10 +1394,10 @@ string pkgAcqIndexTrans::Custom600Headers() const
 /* */
 void pkgAcqIndexTrans::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 {
 /* */
 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)
    {
    if (nextExt != std::string::npos)
    {
-      CompressionExtension = CompressionExtension.substr(nextExt+1);
+      CompressionExtensions = CompressionExtensions.substr(nextExt+1);
       Init(RealURI, Desc.Description, Desc.ShortDesc);
       Status = StatIdle;
       return;
       Init(RealURI, Desc.Description, Desc.ShortDesc);
       Status = StatIdle;
       return;
@@ -1360,12 +1417,17 @@ void pkgAcqIndexTrans::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
    Item::Failed(Message,Cnf);
 }
                                                                        /*}}}*/
    Item::Failed(Message,Cnf);
 }
                                                                        /*}}}*/
-
+// AcqMetaBase::Add - Add a item to the current Transaction            /*{{{*/
+// ---------------------------------------------------------------------
+/* */
 void pkgAcqMetaBase::Add(Item *I)
 {
    Transaction.push_back(I);
 }
 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)
 void pkgAcqMetaBase::AbortTransaction()
 {
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)
@@ -1380,9 +1442,19 @@ void pkgAcqMetaBase::AbortTransaction()
       // the transaction will abort, so stop anything that is idle
       if ((*I)->Status == pkgAcquire::Item::StatIdle)
          (*I)->Status = pkgAcquire::Item::StatDone;
       // the transaction will abort, so stop anything that is idle
       if ((*I)->Status == pkgAcquire::Item::StatIdle)
          (*I)->Status = pkgAcquire::Item::StatDone;
+
+      // kill files in partial
+      string PartialFile = _config->FindDir("Dir::State::lists");
+      PartialFile += "partial/";
+      PartialFile += 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();
 bool pkgAcqMetaBase::TransactionHasError()
 {
    for (pkgAcquire::ItemIterator I = Transaction.begin();
@@ -1393,7 +1465,10 @@ bool pkgAcqMetaBase::TransactionHasError()
 
    return false;
 }
 
    return false;
 }
-// Acquire::CommitTransaction - Commit a transaction                   /*{{{*/
+                                                                       /*}}}*/
+// AcqMetaBase::CommitTransaction - Commit a transaction               /*{{{*/
+// ---------------------------------------------------------------------
+/* */
 void pkgAcqMetaBase::CommitTransaction()
 {
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)
 void pkgAcqMetaBase::CommitTransaction()
 {
    if(_config->FindB("Debug::Acquire::Transaction", false) == true)
@@ -1427,8 +1502,32 @@ void pkgAcqMetaBase::CommitTransaction()
       (*I)->TransactionManager = 0;
    }
 }
       (*I)->TransactionManager = 0;
    }
 }
-
+                                                                       /*}}}*/
+// AcqMetaBase::CommitTransaction - Commit a transaction               /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgAcqMetaBase::TransactionStageCopy(Item *I,
+                                          const std::string &From,
+                                          const std::string &To)
+{
+   I->PartialFile = From;
+   I->DestFile = To;
+}
+                                                                       /*}}}*/
+// AcqMetaBase::CommitTransaction - Commit a transaction               /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgAcqMetaBase::TransactionStageRemoval(Item *I,
+                                             const std::string &FinalFile)
+{
+   I->PartialFile = "";
+   I->DestFile = FinalFile; 
+}
+                                                                       /*}}}*/
                                                                        /*{{{*/
                                                                        /*{{{*/
+// AcqMetaBase::GenerateAuthWarning - Check gpg authentication error   /*{{{*/
+// ---------------------------------------------------------------------
+/* */
 bool pkgAcqMetaBase::GenerateAuthWarning(const std::string &RealURI,
                                          const std::string &Message)
 {
 bool pkgAcqMetaBase::GenerateAuthWarning(const std::string &RealURI,
                                          const std::string &Message)
 {
@@ -1462,21 +1561,22 @@ bool pkgAcqMetaBase::GenerateAuthWarning(const std::string &RealURI,
    return false;
 }
                                                                        /*}}}*/
    return false;
 }
                                                                        /*}}}*/
-
-
-pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,                        /*{{{*/
+// AcqMetaSig::AcqMetaSig - Constructor                                /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner,
                              pkgAcqMetaBase *TransactionManager,
                             string URI,string URIDesc,string ShortDesc,
                              string MetaIndexFile,
                             const vector<IndexTarget*>* IndexTargets,
                             indexRecords* MetaIndexParser) :
                              pkgAcqMetaBase *TransactionManager,
                             string URI,string URIDesc,string ShortDesc,
                              string MetaIndexFile,
                             const vector<IndexTarget*>* IndexTargets,
                             indexRecords* MetaIndexParser) :
-   pkgAcqMetaBase(Owner, HashStringList(), TransactionManager), RealURI(URI), 
-   MetaIndexParser(MetaIndexParser), MetaIndexFile(MetaIndexFile),
-   URIDesc(URIDesc), ShortDesc(ShortDesc),
-   IndexTargets(IndexTargets), AuthPass(false), IMSHit(false)
+   pkgAcqMetaBase(Owner, IndexTargets, MetaIndexParser, 
+                  HashStringList(), TransactionManager),
+   RealURI(URI), MetaIndexFile(MetaIndexFile), URIDesc(URIDesc),
+   ShortDesc(ShortDesc)
 {
    DestFile = _config->FindDir("Dir::State::lists") + "partial/";
 {
    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 
@@ -1515,118 +1615,134 @@ string pkgAcqMetaSig::Custom600Headers() const
 
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }
 
    return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 }
-
-void pkgAcqMetaSig::Done(string Message,unsigned long long Size, HashStringList const &Hashes,
+                                                                       /*}}}*/
+// 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, Hashes, Cfg);
 
                         pkgAcquire::MethodConfig *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";
-      return;
-   }
+      // queue for verify, note that we change DestFile here to point to
+      // the file we want to verify (needed to make gpgv work)
 
 
-   if (FileName != DestFile)
-   {
-      // We have to copy it into place
-      Local = true;
-      Desc.URI = "copy:" + FileName;
-      QueueURI(Desc);
-      return;
-   }
+      string FileName = LookupTag(Message,"Filename");
+      if (FileName.empty() == true)
+      {
+         Status = StatError;
+         ErrorText = "Method gave a blank filename";
+         return;
+      }
 
 
-   if(StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
-      IMSHit = true;
+      if (FileName != DestFile)
+      {
+         // We have to copy it into place
+         Local = true;
+         Desc.URI = "copy:" + FileName;
+         QueueURI(Desc);
+         return;
+      }
 
 
-   // adjust paths if its a ims-hit
-   if(IMSHit)
-   {
-      string FinalFile = _config->FindDir("Dir::State::lists");
-      FinalFile += URItoFileName(RealURI);
-         
-      DestFile = PartialFile = FinalFile;
-   }
+      if(StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
+      {
+         IMSHit = true;
+         // adjust DestFile on i-m-s hit to the one we already have on disk
+         DestFile = _config->FindDir("Dir::State::lists");
+         DestFile += URItoFileName(RealURI);
+      }
+
+      // this is the file we verify from
+      MetaIndexFileSignature = DestFile;
 
 
-   // queue for verify
-   if(AuthPass == false)
-   {
       AuthPass = true;
       AuthPass = true;
-      Desc.URI = "gpgv:" + DestFile;
+      Desc.URI = "gpgv:" + MetaIndexFileSignature;
       DestFile = MetaIndexFile;
       QueueURI(Desc);
       DestFile = MetaIndexFile;
       QueueURI(Desc);
+      ActiveSubprocess = "gpgv";
       return;
    }
       return;
    }
-
-   // queue to copy the file in place if it was not a ims hit, on ims
-   // hit the file is already at the right place
-   if(IMSHit == false)
+   else 
    {
    {
-      PartialFile = _config->FindDir("Dir::State::lists") + "partial/";
-      PartialFile += URItoFileName(RealURI);
-      
-      DestFile = _config->FindDir("Dir::State::lists");
-      DestFile += URItoFileName(RealURI);
-   }
+      // verify was successful
 
 
-   // we parse the MetaIndexFile here because at this point we can
-   // trust the data
-   if(AuthPass == true)
-   {
+      // we parse the MetaIndexFile here (and not right after getting 
+      // the pkgAcqMetaIndex) because at this point we can trust the data
+      //
       // load indexes and queue further downloads
       MetaIndexParser->Load(MetaIndexFile);
       // load indexes and queue further downloads
       MetaIndexParser->Load(MetaIndexFile);
-      ((pkgAcqMetaIndex*)TransactionManager)->QueueIndexes(true);
-   }
+      QueueIndexes(true);
 
 
-   Complete = true;
+      // DestFile points to the the MetaIndeFile at this point, make it
+      // point back to the Release.gpg file
+      std::string FinalFile = _config->FindDir("Dir::State::lists");
+      FinalFile += URItoFileName(RealURI);
+      TransactionManager->TransactionStageCopy(this, MetaIndexFileSignature, FinalFile);
+
+      Complete = true;
+   }
 }
                                                                        /*}}}*/
 void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)/*{{{*/
 {
    string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
 }
                                                                        /*}}}*/
 void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)/*{{{*/
 {
    string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
-   
+
+   // FIXME: duplicated code from pkgAcqMetaIndex
+   if (AuthPass == true)
+   {
+      bool Stop = GenerateAuthWarning(RealURI, Message);
+      if(Stop)
+         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);
 
    // 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);
 
-   if(RealFileExists(Final) || RealFileExists(FinalInRelease))
+   if (RealFileExists(Final) || RealFileExists(FinalInRelease))
    {
    {
-      _error->Error("The repository '%s' is no longer signed.",
-                    URIDesc.c_str());
-      Rename(MetaIndexFile, MetaIndexFile+".FAILED");
-      Status = pkgAcquire::Item::StatError;
-      TransactionManager->AbortTransaction();
-      return;
+      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");
+         Status = pkgAcquire::Item::StatError;
+         TransactionManager->AbortTransaction();
+         return;
+      }
    }
 
    // this ensures that any file in the lists/ dir is removed by the
    // transaction
    DestFile =  _config->FindDir("Dir::State::lists") + "partial/";
    DestFile += URItoFileName(RealURI);
    }
 
    // this ensures that any file in the lists/ dir is removed by the
    // transaction
    DestFile =  _config->FindDir("Dir::State::lists") + "partial/";
    DestFile += URItoFileName(RealURI);
-   PartialFile = "";
-
-   // FIXME: duplicated code from pkgAcqMetaIndex
-   if (AuthPass == true)
-   {
-      bool Stop = GenerateAuthWarning(RealURI, Message);
-      if(Stop)
-         return;
-   }
+   TransactionManager->TransactionStageRemoval(this, DestFile);
 
    // only allow going further if the users explicitely wants it
 
    // only allow going further if the users explicitely wants it
-   if(_config->FindB("APT::Get::AllowUnauthenticated", false) == true)
+   if(_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);
    {
       // we parse the indexes here because at this point the user wanted
       // a repository that may potentially harm him
       MetaIndexParser->Load(MetaIndexFile);
-      ((pkgAcqMetaIndex*)TransactionManager)->QueueIndexes(true);
+      QueueIndexes(true);
    } 
    else 
    {
    } 
    else 
    {
-      _error->Warning("Use --allow-unauthenticated to force the update");
+      _error->Warning("Use --allow-insecure-repositories to force the update");
    }
 
    // FIXME: this is used often (e.g. in pkgAcqIndexTrans) so refactor
    }
 
    // FIXME: this is used often (e.g. in pkgAcqIndexTrans) so refactor
@@ -1648,9 +1764,9 @@ pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner,                       /*{{{*/
                                  string MetaIndexSigURI,string MetaIndexSigURIDesc, string MetaIndexSigShortDesc,
                                 const vector<IndexTarget*>* IndexTargets,
                                 indexRecords* MetaIndexParser) :
                                  string MetaIndexSigURI,string MetaIndexSigURIDesc, string MetaIndexSigShortDesc,
                                 const vector<IndexTarget*>* IndexTargets,
                                 indexRecords* MetaIndexParser) :
-   pkgAcqMetaBase(Owner, HashStringList(), TransactionManager), RealURI(URI), IndexTargets(IndexTargets),
-   URIDesc(URIDesc), ShortDesc(ShortDesc),
-   MetaIndexParser(MetaIndexParser), AuthPass(false), IMSHit(false),
+   pkgAcqMetaBase(Owner, IndexTargets, MetaIndexParser, HashStringList(),
+                  TransactionManager), 
+   RealURI(URI), URIDesc(URIDesc), ShortDesc(ShortDesc),
    MetaIndexSigURI(MetaIndexSigURI), MetaIndexSigURIDesc(MetaIndexSigURIDesc),
    MetaIndexSigShortDesc(MetaIndexSigShortDesc)
 {
    MetaIndexSigURI(MetaIndexSigURI), MetaIndexSigURIDesc(MetaIndexSigURIDesc),
    MetaIndexSigShortDesc(MetaIndexSigShortDesc)
 {
@@ -1751,9 +1867,9 @@ void pkgAcqMetaIndex::Done(string Message,unsigned long long Size,HashStringList
       FinalFile += URItoFileName(RealURI);
       if (SigFile == DestFile)
         SigFile = FinalFile;
       FinalFile += URItoFileName(RealURI);
       if (SigFile == DestFile)
         SigFile = FinalFile;
+
       // queue for copy in place
       // queue for copy in place
-      PartialFile = DestFile;
-      DestFile = FinalFile;
+      TransactionManager->TransactionStageCopy(this, DestFile, FinalFile);
    }
 }
                                                                        /*}}}*/
    }
 }
                                                                        /*}}}*/
@@ -1881,7 +1997,7 @@ void pkgAcqMetaIndex::AuthDone(string Message)                            /*{{{*/
 #endif
 }
                                                                        /*}}}*/
 #endif
 }
                                                                        /*}}}*/
-void pkgAcqMetaIndex::QueueIndexes(bool verify)                                /*{{{*/
+void pkgAcqMetaBase::QueueIndexes(bool verify)                         /*{{{*/
 {
    bool transInRelease = false;
    {
 {
    bool transInRelease = false;
    {
@@ -2059,27 +2175,6 @@ void pkgAcqMetaIndex::Failed(string Message,
          return;
    }
 
          return;
    }
 
-   /* 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;
-      }
-
-      // Done, queue for rename on transaction finished
-      PartialFile = DestFile;
-      DestFile = FinalFile;
-   }
-
    _error->Warning(_("The data from '%s' is not signed. Packages "
                      "from that repository can not be authenticated."),
                    URIDesc.c_str());
    _error->Warning(_("The data from '%s' is not signed. Packages "
                      "from that repository can not be authenticated."),
                    URIDesc.c_str());
@@ -2087,13 +2182,37 @@ void pkgAcqMetaIndex::Failed(string Message,
    // 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
    // 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(_config->FindB("APT::Get::AllowUnauthenticated", false) == true)
+   if(_config->FindB("Acquire::AllowInsecureRepositories") == true)
    {
    {
+      /* 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;
+         }
+
+         // Done, queue for rename on transaction finished
+         TransactionManager->TransactionStageCopy(this, DestFile, FinalFile);
+      }
+
       QueueIndexes(false);
    } else {
       // warn if the repository is unsinged
       QueueIndexes(false);
    } else {
       // warn if the repository is unsinged
-      _error->Warning("Use --allow-unauthenticated to force the update");
+      _error->Warning("Use --allow-insecure-repositories to force the update");
+      TransactionManager->AbortTransaction();
+      Status = StatError;
+      return;
    } 
    } 
+
 }
                                                                        /*}}}*/
 
 }
                                                                        /*}}}*/
 
@@ -2196,8 +2315,7 @@ void pkgAcqMetaClearSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*
       // impression (CVE-2012-0214)
       string FinalFile = _config->FindDir("Dir::State::lists");
       FinalFile.append(URItoFileName(RealURI));
       // impression (CVE-2012-0214)
       string FinalFile = _config->FindDir("Dir::State::lists");
       FinalFile.append(URItoFileName(RealURI));
-      PartialFile = "";
-      DestFile = FinalFile;
+      TransactionManager->TransactionStageRemoval(this, FinalFile);
 
       new pkgAcqMetaIndex(Owner, TransactionManager,
                        MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
 
       new pkgAcqMetaIndex(Owner, TransactionManager,
                        MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
APT (for Cydia)