Only support Translation-* that are listed in the {In,}Release file

Handle Translation-* files exactly like Packages files (with the
expection that it is ok if a download of them fails). Remove all
"guessing" on apts side. This will elimimnate a bunch of errors
releated to captive portals and similar. Its also more correct
and removes another potential attack vector.

3 files changed, 44 insertions, 155 deletions

diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc
index 704e285b5..0e406f368 100644
--- a/apt-pkg/acquire-item.cc
+++ b/apt-pkg/acquire-item.cc
@@ -1275,6 +1275,9 @@ string pkgAcqIndex::Custom600Headers() const
    if (stat(Final.c_str(),&Buf) == 0)
       msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
 
+   if(Target->IsOptional())
+      msg += "\nFail-Ignore: true";
+
    return msg;
 }
 									/*}}}*/
@@ -1297,8 +1300,10 @@ void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
 
    Item::Failed(Message,Cnf);
 
-   /// cancel the entire transaction
-   TransactionManager->AbortTransaction();
+   if(Target->IsOptional() && ExpectedHashes.empty() && Stage == STAGE_DOWNLOAD)
+      Status = StatDone;
+   else
+      TransactionManager->AbortTransaction();
 }
 									/*}}}*/
 // pkgAcqIndex::GetFinalFilename - Return the full final file path	/*{{{*/
@@ -1490,57 +1495,6 @@ void pkgAcqIndex::StageDecompressDone(string Message,
    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, HashStringList())
-{
-}
-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() const
-{
-   string Final = GetFinalFilename();
-
-   struct stat Buf;
-   if (stat(Final.c_str(),&Buf) != 0)
-      return "\nFail-Ignore: true\nIndex-File: true";
-   return "\nFail-Ignore: true\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
-}
-									/*}}}*/
-// AcqIndexTrans::Failed - Silence failure messages for missing files	/*{{{*/
-void pkgAcqIndexTrans::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
-{
-   size_t const nextExt = CompressionExtensions.find(' ');
-   if (nextExt != std::string::npos)
-   {
-      CompressionExtensions = CompressionExtensions.substr(nextExt+1);
-      Init(RealURI, Desc.Description, Desc.ShortDesc);
-      Status = StatIdle;
-      return;
-   }
-
-   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;
-   }
-}
-									/*}}}*/
 // AcqMetaBase::Add - Add a item to the current Transaction		/*{{{*/
 void pkgAcqMetaBase::Add(Item *I)
 {
@@ -1999,87 +1953,59 @@ bool pkgAcqMetaBase::CheckDownloadDone(const std::string &Message,
 									/*}}}*/
 void pkgAcqMetaBase::QueueIndexes(bool verify)				/*{{{*/
 {
-   bool transInRelease = false;
-   {
-      std::vector<std::string> const keys = MetaIndexParser->MetaKeys();
-      for (std::vector<std::string>::const_iterator k = keys.begin(); k != keys.end(); ++k)
-	 // FIXME: Feels wrong to check for hardcoded string here, but what should we do else…
-	 if (k->find("Translation-") != std::string::npos)
-	 {
-	    transInRelease = true;
-	    break;
-	 }
-   }
-
    // at this point the real Items are loaded in the fetcher
    ExpectedAdditionalItems = 0;
-   for (vector <IndexTarget*>::const_iterator Target = IndexTargets->begin();
+
+   vector <struct IndexTarget*>::const_iterator Target;
+   for (Target = IndexTargets->begin();
         Target != IndexTargets->end();
         ++Target)
    {
       HashStringList ExpectedIndexHashes;
       const indexRecords::checkSum *Record = MetaIndexParser->Lookup((*Target)->MetaKey);
-      bool compressedAvailable = false;
-      if (Record == NULL)
+
+      // optional target that we do not have in the Release file are 
+      // skipped
+      if (verify == true && Record == NULL && (*Target)->IsOptional())
+         continue;
+
+      // targets without a hash record are a error when verify is required
+      if (verify == true && Record == NULL)
       {
-	 if ((*Target)->IsOptional() == true)
-	 {
-	    std::vector<std::string> types = APT::Configuration::getCompressionTypes();
-	    for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t)
-	       if (MetaIndexParser->Exists((*Target)->MetaKey + "." + *t) == true)
-	       {
-		  compressedAvailable = true;
-		  break;
-	       }
-	 }
-	 else if (verify == true)
-	 {
-	    Status = StatAuthError;
-	    strprintf(ErrorText, _("Unable to find expected entry '%s' in Release file (Wrong sources.list entry or malformed file)"), (*Target)->MetaKey.c_str());
-	    return;
-	 }
+         Status = StatAuthError;
+         strprintf(ErrorText, _("Unable to find expected entry '%s' in Release file (Wrong sources.list entry or malformed file)"), (*Target)->MetaKey.c_str());
+         return;
       }
-      else
+
+      if (Record)
+         ExpectedIndexHashes = Record->Hashes;
+      
+      if (_config->FindB("Debug::pkgAcquire::Auth", false))
       {
-	 ExpectedIndexHashes = Record->Hashes;
-	 if (_config->FindB("Debug::pkgAcquire::Auth", false))
-	 {
-	    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 && ExpectedIndexHashes.empty() == true && (*Target)->IsOptional() == false)
-	 {
-	    Status = StatAuthError;
-	    strprintf(ErrorText, _("Unable to find hash sum for '%s' in Release file"), (*Target)->MetaKey.c_str());
-	    return;
-	 }
-      }
+         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 ((*Target)->IsOptional() == true)
+      }
+      if (verify == true && ExpectedIndexHashes.empty() == 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, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser);
-	    else
-	       new pkgAcqIndexTrans(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser);
-	 }
-	 continue;
+         Status = StatAuthError;
+         strprintf(ErrorText, _("Unable to find hash sum for '%s' in Release file"), (*Target)->MetaKey.c_str());
+         return;
       }
 
-      /* Queue Packages file (either diff or full packages files, depending
+      /* Queue the Index file (Packages, Sources, Translation-$foo
+         (either diff or full packages files, depending
          on the users option) - we also check if the PDiff Index file is listed
          in the Meta-Index file. Ideal would be if pkgAcqDiffIndex would test this
          instead, but passing the required info to it is to much hassle */
       if(_config->FindB("Acquire::PDiffs",true) == true && (verify == false ||
-	  MetaIndexParser->Exists((*Target)->MetaKey + ".diff/Index") == true))
-	 new pkgAcqDiffIndex(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser);
+          MetaIndexParser->Exists((*Target)->MetaKey + ".diff/Index") == true))
+         new pkgAcqDiffIndex(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser);
       else
-	 new pkgAcqIndex(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser);
+         new pkgAcqIndex(Owner, TransactionManager, *Target, ExpectedIndexHashes, MetaIndexParser);
    }
 }
 									/*}}}*/
diff --git a/apt-pkg/acquire-item.h b/apt-pkg/acquire-item.h
index 68d5a01ce..7adc1976b 100644
--- a/apt-pkg/acquire-item.h
+++ b/apt-pkg/acquire-item.h
@@ -1024,43 +1024,6 @@ class pkgAcqIndex : public pkgAcqBaseIndex
              std::string const &ShortDesc);
 };
 									/*}}}*/
-/** \brief An acquire item that is responsible for fetching a		{{{
- *  translated index file.
- *
- *  The only difference from pkgAcqIndex is that transient failures
- *  are suppressed: no error occurs if the translated index file is
- *  missing.
- */
-class pkgAcqIndexTrans : public pkgAcqIndex
-{
-   void *d;
-
-   public:
-  
-   virtual void Failed(std::string Message,pkgAcquire::MethodConfig *Cnf);
-   virtual std::string Custom600Headers() const;
-
-   /** \brief Create a pkgAcqIndexTrans.
-    *
-    *  \param Owner The pkgAcquire object with which this item is
-    *  associated.
-    *
-    *  \param URI The URI of the index file that is to be downloaded.
-    *
-    *  \param URIDesc A "URI-style" description of this index file.
-    *
-    *  \param ShortDesc A brief description of this index file.
-    */
-   pkgAcqIndexTrans(pkgAcquire *Owner,
-                    std::string URI,std::string URIDesc,
-		    std::string ShortDesc);
-   pkgAcqIndexTrans(pkgAcquire *Owner,
-                    pkgAcqMetaBase *TransactionManager,
-                    IndexTarget const * const Target,
-                    HashStringList const &ExpectedHashes,
-                    indexRecords *MetaIndexParser);
-};
-									/*}}}*/
 /** \brief Information about an index file. */				/*{{{*/
 class IndexTarget
 {
diff --git a/apt-pkg/deb/debindexfile.cc b/apt-pkg/deb/debindexfile.cc
index cc1d94d81..779c74abf 100644
--- a/apt-pkg/deb/debindexfile.cc
+++ b/apt-pkg/deb/debindexfile.cc
@@ -458,9 +458,9 @@ string debTranslationsIndex::IndexURI(const char *Type) const
 bool debTranslationsIndex::GetIndexes(pkgAcquire *Owner) const
 {
    string const TranslationFile = string("Translation-").append(Language);
-   new pkgAcqIndexTrans(Owner, IndexURI(Language),
-                        Info(TranslationFile.c_str()),
-                        TranslationFile);
+   new pkgAcqIndex(Owner, IndexURI(Language),
+                   Info(TranslationFile.c_str()),
+                   TranslationFile, HashStringList());
 
    return true;
 }