Bug#499897: illustration

[Thomas Viehmann <tv@beamnet.de>]

Hi,

the following is more an illustration of how things could work (or not).
In particular, the questions of defaults / "Valid-Until: eternity" are
not addressed.

Kind regards

T.
-- 
Thomas Viehmann, http://thomas.viehmann.net/

diff -Nru apt-0.7.14/apt-pkg/acquire-item.cc apt-0.7.14+/apt-pkg/acquire-item.cc
--- apt-0.7.14/apt-pkg/acquire-item.cc	2008-05-28 15:22:13.000000000 +0200
+++ apt-0.7.14+/apt-pkg/acquire-item.cc	2008-12-01 00:09:21.000000000 +0100
@@ -32,6 +32,7 @@
 #include <string>
 #include <sstream>
 #include <stdio.h>
+#include <ctime>
 									/*}}}*/
 
 using namespace std;
@@ -1127,6 +1128,13 @@
       Transformed = "";
    }
 
+   if (_config->FindB("Acquire::Check-Valid-Until", true)) {
+      if (time(NULL) > MetaIndexParser->GetValidUntil()) {
+          _error->Warning(string("Release file expired, ignoring "+RealURI).c_str());
+         return false;
+      }
+   }
+
    if (_config->FindB("Debug::pkgAcquire::Auth", false)) 
    {
       std::cerr << "Got Codename: " << MetaIndexParser->GetDist() << std::endl;
diff -Nru apt-0.7.14/apt-pkg/indexrecords.cc apt-0.7.14+/apt-pkg/indexrecords.cc
--- apt-0.7.14/apt-pkg/indexrecords.cc	2008-05-28 15:22:14.000000000 +0200
+++ apt-0.7.14+/apt-pkg/indexrecords.cc	2008-12-01 00:06:36.000000000 +0100
@@ -9,6 +9,7 @@
 #include <apt-pkg/strutl.h>
 #include <apti18n.h>
 #include <sys/stat.h>
+#include <clocale>
 
 string indexRecords::GetDist() const
 {
@@ -26,6 +27,11 @@
    return this->ExpectedDist;
 }
 
+time_t indexRecords::GetValidUntil() const
+{
+   return this->ValidUntil;
+}
+
 const indexRecords::checkSum *indexRecords::Lookup(const string MetaKey)
 {
    return Entries[MetaKey];
@@ -83,6 +89,22 @@
    }  
 
    string Strdate = Section.FindS("Date"); // FIXME: verify this somehow?
+
+   string StrValidUntil = Section.FindS("Valid-Until");
+   ValidUntil = 1230764400;
+         // default 2009-01-01 should only be applied to debian.org?
+   
+   if (! StrValidUntil.empty()) {
+      struct tm atm;
+      string lctimesaved = setlocale(LC_TIME,NULL);
+      setlocale(LC_TIME,"C");
+      if (strptime(StrValidUntil.c_str(),"%a, %d %b %Y %H:%M:%S %Z",&atm) == NULL) {
+          ErrorText = _(("Invalid Valid-Until entry in Release file " + Filename).c_str());
+          return false;
+      }
+      setlocale(LC_TIME,lctimesaved.c_str());
+      ValidUntil = mktime(&atm);
+   }
    return true;
 }
 
diff -Nru apt-0.7.14/apt-pkg/indexrecords.h apt-0.7.14+/apt-pkg/indexrecords.h
--- apt-0.7.14/apt-pkg/indexrecords.h	2008-05-28 15:22:14.000000000 +0200
+++ apt-0.7.14+/apt-pkg/indexrecords.h	2008-09-25 18:17:13.000000000 +0200
@@ -12,6 +12,7 @@
 
 #include <map>
 #include <vector>
+#include <ctime>
 
 class indexRecords
 {
@@ -25,6 +26,8 @@
    string Dist;
    string Suite;
    string ExpectedDist;
+   time_t ValidUntil;
+
    std::map<string,checkSum *> Entries;
 
    public:
@@ -38,6 +41,7 @@
 
    virtual bool Load(string Filename);
    string GetDist() const;
+   time_t GetValidUntil() const;
    virtual bool CheckDist(const string MaybeDist) const;
    string GetExpectedDist() const;
    virtual ~indexRecords(){};