fileutl: simple_buffer: Add write() and full() methods

[apt.git] / apt-pkg / acquire-item.cc

diff --git a/apt-pkg/acquire-item.cc b/apt-pkg/acquire-item.cc
index 2c081261dd335fd81141f3da386fddd09dcb3ea5..7f31d14492b967a649c0cb5bdd2e1f3dadd18dd3 100644 (file)
--- a/apt-pkg/acquire-item.cc
+++ b/apt-pkg/acquire-item.cc
@@ -153,12 +153,12 @@ static bool MessageInsecureRepository(bool const isError, std::string const &msg
    if (isError)
    {
       _error->Error("%s", msg.c_str());
-      _error->Notice("%s", _("Updating such a repository securily is impossible and therefore disabled by default."));
+      _error->Notice("%s", _("Updating from such a repository can't be done securely, and is therefore disabled by default."));
    }
    else
    {
       _error->Warning("%s", msg.c_str());
-      _error->Notice("%s", _("Data from such a repository can not be authenticated and is therefore potentially dangerous to use."));
+      _error->Notice("%s", _("Data from such a repository can't be authenticated and is therefore potentially dangerous to use."));
    }
    _error->Notice("%s", _("See apt-secure(8) manpage for repository creation and user configuration details."));
    return false;
@@ -1075,6 +1075,16 @@ void pkgAcqMetaBase::QueueIndexes(bool const verify)                     /*{{{*/
            strprintf(ErrorText, _("Unable to find expected entry '%s' in Release file (Wrong sources.list entry or malformed file)"), Target->MetaKey.c_str());
            return;
         }
+        else
+        {
+           auto const hashes = GetExpectedHashesFor(Target->MetaKey);
+           if (hashes.usable() == false && hashes.empty() == false)
+           {
+              _error->Warning(_("Skipping acquire of configured file '%s' as repository '%s' provides only weak security information for it"),
+                       Target->MetaKey.c_str(), TransactionManager->Target.Description.c_str());
+              continue;
+           }
+        }
 
         // autoselect the compression method
         std::vector<std::string> types = VectorizeString(Target->Option(IndexTarget::COMPRESSIONTYPES), ' ');
@@ -1391,7 +1401,7 @@ void pkgAcqMetaClearSig::Failed(string const &Message,pkgAcquire::MethodConfig c
 
       // 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
+      // only allow going further if the user explicitly wants it
       if(AllowInsecureRepositories(_("The repository '%s' is not signed."), ClearsignedTarget.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true)
       {
         Status = StatDone;
@@ -1489,7 +1499,7 @@ void pkgAcqMetaIndex::Failed(string const &Message,
 
    // No Release file was present so fall
    // back to queueing Packages files without verification
-   // only allow going further if the users explicitely wants it
+   // only allow going further if the user explicitly wants it
    if(AllowInsecureRepositories(_("The repository '%s' does not have a Release file."), Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true)
    {
       // ensure old Release files are removed
@@ -1640,7 +1650,7 @@ void pkgAcqMetaSig::Failed(string const &Message,pkgAcquire::MethodConfig const
    // ensures that a Release.gpg file in the lists/ is removed by the transaction
    TransactionManager->TransactionStageRemoval(this, DestFile);
 
-   // only allow going further if the users explicitely wants it
+   // only allow going further if the user explicitly wants it
    if (AllowInsecureRepositories(_("The repository '%s' is not signed."), MetaIndex->Target.Description, TransactionManager->MetaIndexParser, TransactionManager, this) == true)
    {
       if (RealFileExists(FinalReleasegpg) || RealFileExists(FinalInRelease))
@@ -1731,6 +1741,9 @@ pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire * const Owner,
 /* The only header we use is the last-modified header. */
 string pkgAcqDiffIndex::Custom600Headers() const
 {
+   if (TransactionManager->LastMetaIndexParser != NULL)
+      return "\nIndex-File: true";
+
    string const Final = GetFinalFilename();
 
    if(Debug)
@@ -1834,10 +1847,18 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile)       /*{{{*/
       std::clog << "Server-Current: " << ServerHashes.find(NULL)->toStr() << " and we start at "
         << CurrentPackagesFile << " " << LocalHashes.FileSize() << " " << LocalHashes.find(NULL)->toStr() << std::endl;
 
+   // historically, older hashes have more info than newer ones, so start
+   // collecting with older ones first to avoid implementing complicated
+   // information merging techniques… a failure is after all always
+   // recoverable with a complete file and hashes aren't changed that often.
+   std::vector<char const *> types;
+   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+      types.push_back(*type);
+
    // parse all of (provided) history
    vector<DiffInfo> available_patches;
    bool firstAcceptedHashes = true;
-   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+   for (auto type = types.crbegin(); type != types.crend(); ++type)
    {
       if (LocalHashes.find(*type) == NULL)
         continue;
@@ -1895,7 +1916,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/
       return false;
    }
 
-   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+   for (auto type = types.crbegin(); type != types.crend(); ++type)
    {
       if (LocalHashes.find(*type) == NULL)
         continue;
@@ -1935,7 +1956,7 @@ bool pkgAcqDiffIndex::ParseDiffIndex(string const &IndexDiffFile) /*{{{*/
       }
    }
 
-   for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type)
+   for (auto type = types.crbegin(); type != types.crend(); ++type)
    {
       std::string tagname = *type;
       tagname.append("-Download");
@@ -2566,12 +2587,17 @@ void pkgAcqIndex::Init(string const &URI, string const &URIDesc,
 /* The only header we use is the last-modified header. */
 string pkgAcqIndex::Custom600Headers() const
 {
-   string Final = GetFinalFilename();
 
    string msg = "\nIndex-File: true";
-   struct stat Buf;
-   if (stat(Final.c_str(),&Buf) == 0)
-      msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
+
+   if (TransactionManager->LastMetaIndexParser == NULL)
+   {
+      std::string const Final = GetFinalFilename();
+
+      struct stat Buf;
+      if (stat(Final.c_str(),&Buf) == 0)
+        msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
+   }
 
    if(Target.IsOptional)
       msg += "\nFail-Ignore: true";
@@ -3170,7 +3196,7 @@ std::string pkgAcqChangelog::URI(std::string const &Template,
         char const * const Component, char const * const SrcName,
         char const * const SrcVersion)
 {
-   if (Template.find("CHANGEPATH") == std::string::npos)
+   if (Template.find("@CHANGEPATH@") == std::string::npos)
       return "";
 
    // the path is: COMPONENT/SRC/SRCNAME/SRCNAME_SRCVER, e.g. main/a/apt/1.1 or contrib/liba/libapt/2.0
@@ -3182,7 +3208,7 @@ std::string pkgAcqChangelog::URI(std::string const &Template,
    if (Component != NULL && strlen(Component) != 0)
       path = std::string(Component) + "/" + path;
 
-   return SubstVar(Template, "CHANGEPATH", path);
+   return SubstVar(Template, "@CHANGEPATH@", path);
 }
                                                                        /*}}}*/
 // AcqChangelog::Failed - Failure handler                              /*{{{*/