add hashsum support in apt-file download and add more tests

apt-pkg/contrib/fileutl.cc

@@ -1841,3 +1841,14 @@ std::string GetTempDir()
 
    return string(tmpdir);
 }
+
+bool Rename(std::string From, std::string To)
+{
+   if (rename(From.c_str(),To.c_str()) != 0)
+   {
+      _error->Error(_("rename failed, %s (%s -> %s)."),strerror(errno),
+                    From.c_str(),To.c_str());
+      return false;
+   }   
+   return true;
+}

apt-pkg/contrib/fileutl.h

@@ -164,6 +164,7 @@ bool RealFileExists(std::string File);
 bool DirectoryExists(std::string const &Path) __attrib_const;
 bool CreateDirectory(std::string const &Parent, std::string const &Path);
 time_t GetModificationTime(std::string const &Path);
+bool Rename(std::string From, std::string To);
 
 std::string GetTempDir();
 

cmdline/apt-helper.cc

@@ -44,6 +44,9 @@ bool DoDownloadFile(CommandLine &CmdL)
    Fetcher.Setup(&Stat);
    std::string download_uri = CmdL.FileList[1];
    std::string targetfile = CmdL.FileList[2];
+   HashString hash;
+   if (CmdL.FileSize() > 3)
+      hash = HashString(CmdL.FileList[3]);
    new pkgAcqFile(&Fetcher, download_uri, "", 0, "desc", "short-desc", 
                   "dest-dir-ignored", targetfile);
    Fetcher.Run();
@@ -52,6 +55,14 @@ bool DoDownloadFile(CommandLine &CmdL)
       _error->Error(_("Download Failed"));
       return false;
    }
+   if(hash.empty() == false)
+      if(hash.VerifyFile(targetfile) == false)
+      {
+         _error->Error(_("HashSum Failed"));
+         Rename(targetfile, targetfile+".failed");
+         return false;
+      }
+
    return true;
 }
 

test/integration/test-apt-helper

@@ -0,0 +1,37 @@
+#!/bin/sh
+set -e
+
+TESTDIR=$(readlink -f $(dirname $0))
+. $TESTDIR/framework
+
+setupenvironment
+configarchitecture "i386"
+
+changetohttpswebserver
+
+echo "foo" > aptarchive/foo
+
+msgtest 'apt-file download-file md5sum'
+apthelper -qq download-file http://localhost:8080/foo foo2 MD5Sum:d3b07384d113edec49eaa6238ad5ff00 && msgpass || msgfail
+testfileequal foo2 'foo'
+
+msgtest 'apt-file download-file sha1'
+apthelper -qq download-file http://localhost:8080/foo foo1 SHA1:f1d2d2f924e986ac86fdf7b36c94bcdf32beec15 && msgpass || msgfail
+testfileequal foo1 'foo'
+
+msgtest 'apt-file download-file sha256'
+apthelper -qq download-file http://localhost:8080/foo foo3 SHA256:b5bb9d8014a0f9b1d61e21e796d78dccdf1352f23cd32812f4850b878ae4944c && msgpass || msgfail
+testfileequal foo3 'foo'
+
+msgtest 'apt-file download-file no-hash'
+apthelper -qq download-file http://localhost:8080/foo foo4 && msgpass || msgfail
+testfileequal foo4 'foo'
+
+msgtest 'apt-file download-file wrong hash'
+if ! apthelper -qq download-file http://localhost:8080/foo foo5 MD5Sum:aabbcc 2>&1 2> download.stderr; then
+   msgpass
+else
+   msgfail
+fi
+testfileequal download.stderr 'E: HashSum Failed'
+testfileequal foo5.failed 'foo'