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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: acquire-item.cc,v 1.46.2.9 2004/01/16 18:51:11 mdz Exp $
/* ######################################################################
Acquire Item - Item to acquire
Each item can download to exactly one file at a time. This means you
cannot create an item that fetches two uri's to two files at the same
time. The pkgAcqIndex class creates a second class upon instantiation
to fetch the other index files because of this.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <config.h>
#include <apt-pkg/acquire-item.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/aptconfiguration.h>
#include <apt-pkg/sourcelist.h>
#include <apt-pkg/error.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/md5.h>
#include <apt-pkg/sha1.h>
#include <apt-pkg/tagfile.h>
#include <apt-pkg/indexrecords.h>
#include <apt-pkg/metaindex.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <string>
#include <sstream>
#include <stdio.h>
#include <ctime>
#include <apti18n.h>
/*}}}*/
using namespace std;
// Acquire::Item::Item - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgAcquire::Item::Item(pkgAcquire *Owner) : Owner(Owner), FileSize(0),
PartialSize(0), Mode(0), ID(0), Complete(false),
Local(false), QueueCounter(0)
{
Owner->Add(this);
Status = StatIdle;
}
/*}}}*/
// Acquire::Item::~Item - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgAcquire::Item::~Item()
{
Owner->Remove(this);
}
/*}}}*/
// Acquire::Item::Failed - Item failed to download /*{{{*/
// ---------------------------------------------------------------------
/* We return to an idle state if there are still other queues that could
fetch this object */
void pkgAcquire::Item::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
{
Status = StatIdle;
ErrorText = LookupTag(Message,"Message");
UsedMirror = LookupTag(Message,"UsedMirror");
if (QueueCounter <= 1)
{
/* This indicates that the file is not available right now but might
be sometime later. If we do a retry cycle then this should be
retried [CDROMs] */
if (Cnf->LocalOnly == true &&
StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
{
Status = StatIdle;
Dequeue();
return;
}
Status = StatError;
Dequeue();
}
// report mirror failure back to LP if we actually use a mirror
string FailReason = LookupTag(Message, "FailReason");
if(FailReason.size() != 0)
ReportMirrorFailure(FailReason);
else
ReportMirrorFailure(ErrorText);
}
/*}}}*/
// Acquire::Item::Start - Item has begun to download /*{{{*/
// ---------------------------------------------------------------------
/* Stash status and the file size. Note that setting Complete means
sub-phases of the acquire process such as decompresion are operating */
void pkgAcquire::Item::Start(string /*Message*/,unsigned long long Size)
{
Status = StatFetching;
if (FileSize == 0 && Complete == false)
FileSize = Size;
}
/*}}}*/
// Acquire::Item::Done - Item downloaded OK /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcquire::Item::Done(string Message,unsigned long long Size,string Hash,
pkgAcquire::MethodConfig *Cnf)
{
// We just downloaded something..
string FileName = LookupTag(Message,"Filename");
UsedMirror = LookupTag(Message,"UsedMirror");
if (Complete == false && !Local && FileName == DestFile)
{
if (Owner->Log != 0)
Owner->Log->Fetched(Size,atoi(LookupTag(Message,"Resume-Point","0").c_str()));
}
if (FileSize == 0)
FileSize= Size;
Status = StatDone;
ErrorText = string();
Owner->Dequeue(this);
}
/*}}}*/
// Acquire::Item::Rename - Rename a file /*{{{*/
// ---------------------------------------------------------------------
/* This helper function is used by alot of item methods as thier final
step */
void pkgAcquire::Item::Rename(string From,string To)
{
if (rename(From.c_str(),To.c_str()) != 0)
{
char S[300];
snprintf(S,sizeof(S),_("rename failed, %s (%s -> %s)."),strerror(errno),
From.c_str(),To.c_str());
Status = StatError;
ErrorText = S;
}
}
/*}}}*/
bool pkgAcquire::Item::RenameOnError(pkgAcquire::Item::RenameOnErrorState const error)/*{{{*/
{
if(FileExists(DestFile))
Rename(DestFile, DestFile + ".FAILED");
switch (error)
{
case HashSumMismatch:
ErrorText = _("Hash Sum mismatch");
Status = StatAuthError;
ReportMirrorFailure("HashChecksumFailure");
break;
case SizeMismatch:
ErrorText = _("Size mismatch");
Status = StatAuthError;
ReportMirrorFailure("SizeFailure");
break;
case InvalidFormat:
ErrorText = _("Invalid file format");
Status = StatError;
// do not report as usually its not the mirrors fault, but Portal/Proxy
break;
}
return false;
}
/*}}}*/
// Acquire::Item::ReportMirrorFailure /*{{{*/
// ---------------------------------------------------------------------
void pkgAcquire::Item::ReportMirrorFailure(string FailCode)
{
// we only act if a mirror was used at all
if(UsedMirror.empty())
return;
#if 0
std::cerr << "\nReportMirrorFailure: "
<< UsedMirror
<< " Uri: " << DescURI()
<< " FailCode: "
<< FailCode << std::endl;
#endif
const char *Args[40];
unsigned int i = 0;
string report = _config->Find("Methods::Mirror::ProblemReporting",
"/usr/lib/apt/apt-report-mirror-failure");
if(!FileExists(report))
return;
Args[i++] = report.c_str();
Args[i++] = UsedMirror.c_str();
Args[i++] = DescURI().c_str();
Args[i++] = FailCode.c_str();
Args[i++] = NULL;
pid_t pid = ExecFork();
if(pid < 0)
{
_error->Error("ReportMirrorFailure Fork failed");
return;
}
else if(pid == 0)
{
execvp(Args[0], (char**)Args);
std::cerr << "Could not exec " << Args[0] << std::endl;
_exit(100);
}
if(!ExecWait(pid, "report-mirror-failure"))
{
_error->Warning("Couldn't report problem to '%s'",
_config->Find("Methods::Mirror::ProblemReporting").c_str());
}
}
/*}}}*/
// AcqSubIndex::AcqSubIndex - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* Get a sub-index file based on checksums from a 'master' file and
possibly query additional files */
pkgAcqSubIndex::pkgAcqSubIndex(pkgAcquire *Owner, string const &URI,
string const &URIDesc, string const &ShortDesc,
HashString const &ExpectedHash)
: Item(Owner), ExpectedHash(ExpectedHash)
{
/* XXX: Beware: Currently this class does nothing (of value) anymore ! */
Debug = _config->FindB("Debug::pkgAcquire::SubIndex",false);
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(URI);
Desc.URI = URI;
Desc.Description = URIDesc;
Desc.Owner = this;
Desc.ShortDesc = ShortDesc;
QueueURI(Desc);
if(Debug)
std::clog << "pkgAcqSubIndex: " << Desc.URI << std::endl;
}
/*}}}*/
// AcqSubIndex::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
/* The only header we use is the last-modified header. */
string pkgAcqSubIndex::Custom600Headers()
{
string Final = _config->FindDir("Dir::State::lists");
Final += URItoFileName(Desc.URI);
struct stat Buf;
if (stat(Final.c_str(),&Buf) != 0)
return "\nIndex-File: true\nFail-Ignore: true\n";
return "\nIndex-File: true\nFail-Ignore: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
}
/*}}}*/
void pkgAcqSubIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
{
if(Debug)
std::clog << "pkgAcqSubIndex failed: " << Desc.URI << std::endl;
Complete = false;
Status = StatDone;
Dequeue();
// No good Index is provided
}
/*}}}*/
void pkgAcqSubIndex::Done(string Message,unsigned long long Size,string Md5Hash, /*{{{*/
pkgAcquire::MethodConfig *Cnf)
{
if(Debug)
std::clog << "pkgAcqSubIndex::Done(): " << Desc.URI << std::endl;
string FileName = LookupTag(Message,"Filename");
if (FileName.empty() == true)
{
Status = StatError;
ErrorText = "Method gave a blank filename";
return;
}
if (FileName != DestFile)
{
Local = true;
Desc.URI = "copy:" + FileName;
QueueURI(Desc);
return;
}
Item::Done(Message,Size,Md5Hash,Cnf);
string FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(Desc.URI);
/* Downloaded invalid transindex => Error (LP: #346386) (Closes: #627642) */
indexRecords SubIndexParser;
if (FileExists(DestFile) == true && !SubIndexParser.Load(DestFile)) {
Status = StatError;
ErrorText = SubIndexParser.ErrorText;
return;
}
// sucess in downloading the index
// rename the index
if(Debug)
std::clog << "Renaming: " << DestFile << " -> " << FinalFile << std::endl;
Rename(DestFile,FinalFile);
chmod(FinalFile.c_str(),0644);
DestFile = FinalFile;
if(ParseIndex(DestFile) == false)
return Failed("", NULL);
Complete = true;
Status = StatDone;
Dequeue();
return;
}
/*}}}*/
bool pkgAcqSubIndex::ParseIndex(string const &IndexFile) /*{{{*/
{
indexRecords SubIndexParser;
if (FileExists(IndexFile) == false || SubIndexParser.Load(IndexFile) == false)
return false;
// so something with the downloaded index
return true;
}
/*}}}*/
// AcqDiffIndex::AcqDiffIndex - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* Get the DiffIndex file first and see if there are patches availabe
* If so, create a pkgAcqIndexDiffs fetcher that will get and apply the
* patches. If anything goes wrong in that process, it will fall back to
* the original packages file
*/
pkgAcqDiffIndex::pkgAcqDiffIndex(pkgAcquire *Owner,
string URI,string URIDesc,string ShortDesc,
HashString ExpectedHash)
: Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash),
Description(URIDesc)
{
Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
Desc.Description = URIDesc + "/DiffIndex";
Desc.Owner = this;
Desc.ShortDesc = ShortDesc;
Desc.URI = URI + ".diff/Index";
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(URI) + string(".DiffIndex");
if(Debug)
std::clog << "pkgAcqDiffIndex: " << Desc.URI << std::endl;
// look for the current package file
CurrentPackagesFile = _config->FindDir("Dir::State::lists");
CurrentPackagesFile += URItoFileName(RealURI);
// FIXME: this file:/ check is a hack to prevent fetching
// from local sources. this is really silly, and
// should be fixed cleanly as soon as possible
if(!FileExists(CurrentPackagesFile) ||
Desc.URI.substr(0,strlen("file:/")) == "file:/")
{
// we don't have a pkg file or we don't want to queue
if(Debug)
std::clog << "No index file, local or canceld by user" << std::endl;
Failed("", NULL);
return;
}
if(Debug)
std::clog << "pkgAcqIndexDiffs::pkgAcqIndexDiffs(): "
<< CurrentPackagesFile << std::endl;
QueueURI(Desc);
}
/*}}}*/
// AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
/* The only header we use is the last-modified header. */
string pkgAcqDiffIndex::Custom600Headers()
{
string Final = _config->FindDir("Dir::State::lists");
Final += URItoFileName(RealURI) + string(".IndexDiff");
if(Debug)
std::clog << "Custom600Header-IMS: " << Final << std::endl;
struct stat Buf;
if (stat(Final.c_str(),&Buf) != 0)
return "\nIndex-File: true";
return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
}
/*}}}*/
bool pkgAcqDiffIndex::ParseDiffIndex(string IndexDiffFile) /*{{{*/
{
if(Debug)
std::clog << "pkgAcqIndexDiffs::ParseIndexDiff() " << IndexDiffFile
<< std::endl;
pkgTagSection Tags;
string ServerSha1;
vector<DiffInfo> available_patches;
FileFd Fd(IndexDiffFile,FileFd::ReadOnly);
pkgTagFile TF(&Fd);
if (_error->PendingError() == true)
return false;
if(TF.Step(Tags) == true)
{
bool found = false;
DiffInfo d;
string size;
string const tmp = Tags.FindS("SHA1-Current");
std::stringstream ss(tmp);
ss >> ServerSha1 >> size;
unsigned long const ServerSize = atol(size.c_str());
FileFd fd(CurrentPackagesFile, FileFd::ReadOnly);
SHA1Summation SHA1;
SHA1.AddFD(fd);
string const local_sha1 = SHA1.Result();
if(local_sha1 == ServerSha1)
{
// we have the same sha1 as the server
if(Debug)
std::clog << "Package file is up-to-date" << std::endl;
// set found to true, this will queue a pkgAcqIndexDiffs with
// a empty availabe_patches
found = true;
}
else
{
if(Debug)
std::clog << "SHA1-Current: " << ServerSha1 << " and we start at "<< fd.Name() << " " << fd.Size() << " " << local_sha1 << std::endl;
// check the historie and see what patches we need
string const history = Tags.FindS("SHA1-History");
std::stringstream hist(history);
while(hist >> d.sha1 >> size >> d.file)
{
// read until the first match is found
// from that point on, we probably need all diffs
if(d.sha1 == local_sha1)
found=true;
else if (found == false)
continue;
if(Debug)
std::clog << "Need to get diff: " << d.file << std::endl;
available_patches.push_back(d);
}
if (available_patches.empty() == false)
{
// patching with too many files is rather slow compared to a fast download
unsigned long const fileLimit = _config->FindI("Acquire::PDiffs::FileLimit", 0);
if (fileLimit != 0 && fileLimit < available_patches.size())
{
if (Debug)
std::clog << "Need " << available_patches.size() << " diffs (Limit is " << fileLimit
<< ") so fallback to complete download" << std::endl;
return false;
}
// see if the patches are too big
found = false; // it was true and it will be true again at the end
d = *available_patches.begin();
string const firstPatch = d.file;
unsigned long patchesSize = 0;
std::stringstream patches(Tags.FindS("SHA1-Patches"));
while(patches >> d.sha1 >> size >> d.file)
{
if (firstPatch == d.file)
found = true;
else if (found == false)
continue;
patchesSize += atol(size.c_str());
}
unsigned long const sizeLimit = ServerSize * _config->FindI("Acquire::PDiffs::SizeLimit", 100);
if (sizeLimit > 0 && (sizeLimit/100) < patchesSize)
{
if (Debug)
std::clog << "Need " << patchesSize << " bytes (Limit is " << sizeLimit/100
<< ") so fallback to complete download" << std::endl;
return false;
}
}
}
// we have something, queue the next diff
if(found)
{
// queue the diffs
string::size_type const last_space = Description.rfind(" ");
if(last_space != string::npos)
Description.erase(last_space, Description.size()-last_space);
new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
ExpectedHash, ServerSha1, available_patches);
Complete = false;
Status = StatDone;
Dequeue();
return true;
}
}
// Nothing found, report and return false
// Failing here is ok, if we return false later, the full
// IndexFile is queued
if(Debug)
std::clog << "Can't find a patch in the index file" << std::endl;
return false;
}
/*}}}*/
void pkgAcqDiffIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
{
if(Debug)
std::clog << "pkgAcqDiffIndex failed: " << Desc.URI << std::endl
<< "Falling back to normal index file aquire" << std::endl;
new pkgAcqIndex(Owner, RealURI, Description, Desc.ShortDesc,
ExpectedHash);
Complete = false;
Status = StatDone;
Dequeue();
}
/*}}}*/
void pkgAcqDiffIndex::Done(string Message,unsigned long long Size,string Md5Hash, /*{{{*/
pkgAcquire::MethodConfig *Cnf)
{
if(Debug)
std::clog << "pkgAcqDiffIndex::Done(): " << Desc.URI << std::endl;
Item::Done(Message,Size,Md5Hash,Cnf);
string FinalFile;
FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI);
// sucess in downloading the index
// rename the index
FinalFile += string(".IndexDiff");
if(Debug)
std::clog << "Renaming: " << DestFile << " -> " << FinalFile
<< std::endl;
Rename(DestFile,FinalFile);
chmod(FinalFile.c_str(),0644);
DestFile = FinalFile;
if(!ParseDiffIndex(DestFile))
return Failed("", NULL);
Complete = true;
Status = StatDone;
Dequeue();
return;
}
/*}}}*/
// AcqIndexDiffs::AcqIndexDiffs - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* The package diff is added to the queue. one object is constructed
* for each diff and the index
*/
pkgAcqIndexDiffs::pkgAcqIndexDiffs(pkgAcquire *Owner,
string URI,string URIDesc,string ShortDesc,
HashString ExpectedHash,
string ServerSha1,
vector<DiffInfo> diffs)
: Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash),
available_patches(diffs), ServerSha1(ServerSha1)
{
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(URI);
Debug = _config->FindB("Debug::pkgAcquire::Diffs",false);
Description = URIDesc;
Desc.Owner = this;
Desc.ShortDesc = ShortDesc;
if(available_patches.empty() == true)
{
// we are done (yeah!)
Finish(true);
}
else
{
// get the next diff
State = StateFetchDiff;
QueueNextDiff();
}
}
/*}}}*/
void pkgAcqIndexDiffs::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
{
if(Debug)
std::clog << "pkgAcqIndexDiffs failed: " << Desc.URI << std::endl
<< "Falling back to normal index file aquire" << std::endl;
new pkgAcqIndex(Owner, RealURI, Description,Desc.ShortDesc,
ExpectedHash);
Finish();
}
/*}}}*/
// Finish - helper that cleans the item out of the fetcher queue /*{{{*/
void pkgAcqIndexDiffs::Finish(bool allDone)
{
// we restore the original name, this is required, otherwise
// the file will be cleaned
if(allDone)
{
DestFile = _config->FindDir("Dir::State::lists");
DestFile += URItoFileName(RealURI);
if(!ExpectedHash.empty() && !ExpectedHash.VerifyFile(DestFile))
{
RenameOnError(HashSumMismatch);
Dequeue();
return;
}
// this is for the "real" finish
Complete = true;
Status = StatDone;
Dequeue();
if(Debug)
std::clog << "\n\nallDone: " << DestFile << "\n" << std::endl;
return;
}
if(Debug)
std::clog << "Finishing: " << Desc.URI << std::endl;
Complete = false;
Status = StatDone;
Dequeue();
return;
}
/*}}}*/
bool pkgAcqIndexDiffs::QueueNextDiff() /*{{{*/
{
// calc sha1 of the just patched file
string FinalFile = _config->FindDir("Dir::State::lists");
FinalFile += URItoFileName(RealURI);
FileFd fd(FinalFile, FileFd::ReadOnly);
SHA1Summation SHA1;
SHA1.AddFD(fd);
string local_sha1 = string(SHA1.Result());
if(Debug)
std::clog << "QueueNextDiff: "
<< FinalFile << " (" << local_sha1 << ")"<<std::endl;
// final file reached before all patches are applied
if(local_sha1 == ServerSha1)
{
Finish(true);
return true;
}
// remove all patches until the next matching patch is found
// this requires the Index file to be ordered
for(vector<DiffInfo>::iterator I=available_patches.begin();
available_patches.empty() == false &&
I != available_patches.end() &&
I->sha1 != local_sha1;
++I)
{
available_patches.erase(I);
}
// error checking and falling back if no patch was found
if(available_patches.empty() == true)
{
Failed("", NULL);
return false;
}
// queue the right diff
Desc.URI = string(RealURI) + ".diff/" + available_patches[0].file + ".gz";
Desc.Description = Description + " " + available_patches[0].file + string(".pdiff");
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(RealURI + ".diff/" + available_patches[0].file);
if(Debug)
std::clog << "pkgAcqIndexDiffs::QueueNextDiff(): " << Desc.URI << std::endl;
QueueURI(Desc);
return true;
}
/*}}}*/
void pkgAcqIndexDiffs::Done(string Message,unsigned long long Size,string Md5Hash, /*{{{*/
pkgAcquire::MethodConfig *Cnf)
{
if(Debug)
std::clog << "pkgAcqIndexDiffs::Done(): " << Desc.URI << std::endl;
Item::Done(Message,Size,Md5Hash,Cnf);
string FinalFile;
FinalFile = _config->FindDir("Dir::State::lists")+URItoFileName(RealURI);
// sucess in downloading a diff, enter ApplyDiff state
if(State == StateFetchDiff)
{
// rred excepts the patch as $FinalFile.ed
Rename(DestFile,FinalFile+".ed");
if(Debug)
std::clog << "Sending to rred method: " << FinalFile << std::endl;
State = StateApplyDiff;
Local = true;
Desc.URI = "rred:" + FinalFile;
QueueURI(Desc);
Mode = "rred";
return;
}
// success in download/apply a diff, queue next (if needed)
if(State == StateApplyDiff)
{
// remove the just applied patch
available_patches.erase(available_patches.begin());
// move into place
if(Debug)
{
std::clog << "Moving patched file in place: " << std::endl
<< DestFile << " -> " << FinalFile << std::endl;
}
Rename(DestFile,FinalFile);
chmod(FinalFile.c_str(),0644);
// see if there is more to download
if(available_patches.empty() == false) {
new pkgAcqIndexDiffs(Owner, RealURI, Description, Desc.ShortDesc,
ExpectedHash, ServerSha1, available_patches);
return Finish();
} else
return Finish(true);
}
}
/*}}}*/
// AcqIndex::AcqIndex - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* The package file is added to the queue and a second class is
instantiated to fetch the revision file */
pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner,
string URI,string URIDesc,string ShortDesc,
HashString ExpectedHash, string comprExt)
: Item(Owner), RealURI(URI), ExpectedHash(ExpectedHash)
{
if(comprExt.empty() == true)
{
// autoselect the compression method
std::vector<std::string> types = APT::Configuration::getCompressionTypes();
for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t)
comprExt.append(*t).append(" ");
if (comprExt.empty() == false)
comprExt.erase(comprExt.end()-1);
}
CompressionExtension = comprExt;
Init(URI, URIDesc, ShortDesc);
}
pkgAcqIndex::pkgAcqIndex(pkgAcquire *Owner, IndexTarget const *Target,
HashString const &ExpectedHash, indexRecords const *MetaIndexParser)
: Item(Owner), RealURI(Target->URI), ExpectedHash(ExpectedHash)
{
// autoselect the compression method
std::vector<std::string> types = APT::Configuration::getCompressionTypes();
CompressionExtension = "";
if (ExpectedHash.empty() == false)
{
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(" ");
}
else
{
for (std::vector<std::string>::const_iterator t = types.begin(); t != types.end(); ++t)
CompressionExtension.append(*t).append(" ");
}
if (CompressionExtension.empty() == false)
CompressionExtension.erase(CompressionExtension.end()-1);
// only verify non-optional targets, see acquire-item.h for a FIXME
// to make this more flexible
if (Target->IsOptional())
Verify = false;
else
Verify = true;
Init(Target->URI, Target->Description, Target->ShortDesc);
}
/*}}}*/
// AcqIndex::Init - defered Constructor /*{{{*/
void pkgAcqIndex::Init(string const &URI, string const &URIDesc, string const &ShortDesc) {
Decompression = false;
Erase = false;
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(URI);
std::string const comprExt = CompressionExtension.substr(0, CompressionExtension.find(' '));
if (comprExt == "uncompressed")
Desc.URI = URI;
else
Desc.URI = URI + '.' + comprExt;
Desc.Description = URIDesc;
Desc.Owner = this;
Desc.ShortDesc = ShortDesc;
QueueURI(Desc);
}
/*}}}*/
// AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
/* The only header we use is the last-modified header. */
string pkgAcqIndex::Custom600Headers()
{
string Final = _config->FindDir("Dir::State::lists");
Final += URItoFileName(RealURI);
if (_config->FindB("Acquire::GzipIndexes",false))
Final += ".gz";
string msg = "\nIndex-File: true";
// FIXME: this really should use "IndexTarget::IsOptional()" but that
// seems to be difficult without breaking ABI
if (ShortDesc().find("Translation") != 0)
msg += "\nFail-Ignore: true";
struct stat Buf;
if (stat(Final.c_str(),&Buf) == 0)
msg += "\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
return msg;
}
/*}}}*/
void pkgAcqIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
{
size_t const nextExt = CompressionExtension.find(' ');
if (nextExt != std::string::npos)
{
CompressionExtension = CompressionExtension.substr(nextExt+1);
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());
}
Item::Failed(Message,Cnf);
}
/*}}}*/
// AcqIndex::Done - Finished a fetch /*{{{*/
// ---------------------------------------------------------------------
/* This goes through a number of states.. On the initial fetch the
method could possibly return an alternate filename which points
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 gzip uri. */
void pkgAcqIndex::Done(string Message,unsigned long long Size,string Hash,
pkgAcquire::MethodConfig *Cfg)
{
Item::Done(Message,Size,Hash,Cfg);
if (Decompression == true)
{
if (_config->FindB("Debug::pkgAcquire::Auth", false))
{
std::cerr << std::endl << RealURI << ": Computed Hash: " << Hash;
std::cerr << " Expected Hash: " << ExpectedHash.toStr() << std::endl;
}
if (!ExpectedHash.empty() && ExpectedHash.toStr() != Hash)
{
RenameOnError(HashSumMismatch);
return;
}
/* Verify the index file for correctness (all indexes must
* have a Package field) (LP: #346386) (Closes: #627642) */
if (Verify == true)
{
FileFd fd(DestFile, FileFd::ReadOnly);
// Only test for correctness if the file is not empty (empty is ok)
if (fd.FileSize() > 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);
return;
}
}
}
// Done, move it into position
string FinalFile = _config->FindDir("Dir::State::lists");
FinalFile += URItoFileName(RealURI);
Rename(DestFile,FinalFile);
chmod(FinalFile.c_str(),0644);
/* We restore the original name to DestFile so that the clean operation
will work OK */
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(RealURI);
// Remove the compressed version.
if (Erase == true)
unlink(DestFile.c_str());
return;
}
Erase = false;
Complete = true;
// Handle the unzipd case
string FileName = LookupTag(Message,"Alt-Filename");
if (FileName.empty() == false)
{
// The files timestamp matches
if (StringToBool(LookupTag(Message,"Alt-IMS-Hit"),false) == true)
return;
Decompression = true;
Local = true;
DestFile += ".decomp";
Desc.URI = "copy:" + FileName;
QueueURI(Desc);
Mode = "copy";
return;
}
FileName = LookupTag(Message,"Filename");
if (FileName.empty() == true)
{
Status = StatError;
ErrorText = "Method gave a blank filename";
}
std::string const compExt = CompressionExtension.substr(0, CompressionExtension.find(' '));
// The files timestamp matches
if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true) {
if (_config->FindB("Acquire::GzipIndexes",false) && compExt == "gz")
// Update DestFile for .gz suffix so that the clean operation keeps it
DestFile += ".gz";
return;
}
if (FileName == DestFile)
Erase = true;
else
Local = true;
string decompProg;
// If we enable compressed indexes and already have gzip, keep it
if (_config->FindB("Acquire::GzipIndexes",false) && compExt == "gz" && !Local) {
string FinalFile = _config->FindDir("Dir::State::lists");
FinalFile += URItoFileName(RealURI) + ".gz";
Rename(DestFile,FinalFile);
chmod(FinalFile.c_str(),0644);
// Update DestFile for .gz suffix so that the clean operation keeps it
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(RealURI) + ".gz";
return;
}
// 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")
decompProg = "copy";
else {
_error->Error("Unsupported extension: %s", compExt.c_str());
return;
}
Decompression = true;
DestFile += ".decomp";
Desc.URI = decompProg + ":" + FileName;
QueueURI(Desc);
// FIXME: this points to a c++ string that goes out of scope
Mode = decompProg.c_str();
}
/*}}}*/
// 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, HashString(), "")
{
}
pkgAcqIndexTrans::pkgAcqIndexTrans(pkgAcquire *Owner, IndexTarget const *Target,
HashString const &ExpectedHash, indexRecords const *MetaIndexParser)
: pkgAcqIndex(Owner, Target, ExpectedHash, MetaIndexParser)
{
}
/*}}}*/
// AcqIndexTrans::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
string pkgAcqIndexTrans::Custom600Headers()
{
string Final = _config->FindDir("Dir::State::lists");
Final += URItoFileName(RealURI);
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 = CompressionExtension.find(' ');
if (nextExt != std::string::npos)
{
CompressionExtension = CompressionExtension.substr(nextExt+1);
Init(RealURI, Desc.Description, Desc.ShortDesc);
Status = StatIdle;
return;
}
if (Cnf->LocalOnly == true ||
StringToBool(LookupTag(Message,"Transient-Failure"),false) == false)
{
// Ignore this
Status = StatDone;
Complete = false;
Dequeue();
return;
}
Item::Failed(Message,Cnf);
}
/*}}}*/
pkgAcqMetaSig::pkgAcqMetaSig(pkgAcquire *Owner, /*{{{*/
string URI,string URIDesc,string ShortDesc,
string MetaIndexURI, string MetaIndexURIDesc,
string MetaIndexShortDesc,
const vector<IndexTarget*>* IndexTargets,
indexRecords* MetaIndexParser) :
Item(Owner), RealURI(URI), MetaIndexURI(MetaIndexURI),
MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc),
MetaIndexParser(MetaIndexParser), IndexTargets(IndexTargets)
{
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(URI);
// remove any partial downloaded sig-file in partial/.
// it may confuse proxies and is too small to warrant a
// partial download anyway
unlink(DestFile.c_str());
// Create the item
Desc.Description = URIDesc;
Desc.Owner = this;
Desc.ShortDesc = ShortDesc;
Desc.URI = URI;
string Final = _config->FindDir("Dir::State::lists");
Final += URItoFileName(RealURI);
if (RealFileExists(Final) == true)
{
// File was already in place. It needs to be re-downloaded/verified
// because Release might have changed, we do give it a differnt
// name than DestFile because otherwise the http method will
// send If-Range requests and there are too many broken servers
// out there that do not understand them
LastGoodSig = DestFile+".reverify";
Rename(Final,LastGoodSig);
}
QueueURI(Desc);
}
/*}}}*/
pkgAcqMetaSig::~pkgAcqMetaSig() /*{{{*/
{
// if the file was never queued undo file-changes done in the constructor
if (QueueCounter == 1 && Status == StatIdle && FileSize == 0 && Complete == false &&
LastGoodSig.empty() == false)
{
string const Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
if (RealFileExists(Final) == false && RealFileExists(LastGoodSig) == true)
Rename(LastGoodSig, Final);
}
}
/*}}}*/
// pkgAcqMetaSig::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
/* The only header we use is the last-modified header. */
string pkgAcqMetaSig::Custom600Headers()
{
struct stat Buf;
if (stat(LastGoodSig.c_str(),&Buf) != 0)
return "\nIndex-File: true";
return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
}
void pkgAcqMetaSig::Done(string Message,unsigned long long Size,string MD5,
pkgAcquire::MethodConfig *Cfg)
{
Item::Done(Message,Size,MD5,Cfg);
string FileName = LookupTag(Message,"Filename");
if (FileName.empty() == true)
{
Status = StatError;
ErrorText = "Method gave a blank filename";
return;
}
if (FileName != DestFile)
{
// We have to copy it into place
Local = true;
Desc.URI = "copy:" + FileName;
QueueURI(Desc);
return;
}
Complete = true;
// put the last known good file back on i-m-s hit (it will
// be re-verified again)
// Else do nothing, we have the new file in DestFile then
if(StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
Rename(LastGoodSig, DestFile);
// queue a pkgAcqMetaIndex to be verified against the sig we just retrieved
new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc,
MetaIndexShortDesc, DestFile, IndexTargets,
MetaIndexParser);
}
/*}}}*/
void pkgAcqMetaSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf)/*{{{*/
{
string Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
// if we get a network error we fail gracefully
if(Status == StatTransientNetworkError)
{
Item::Failed(Message,Cnf);
// move the sigfile back on transient network failures
if(FileExists(LastGoodSig))
Rename(LastGoodSig,Final);
// set the status back to , Item::Failed likes to reset it
Status = pkgAcquire::Item::StatTransientNetworkError;
return;
}
// Delete any existing sigfile when the acquire failed
unlink(Final.c_str());
// queue a pkgAcqMetaIndex with no sigfile
new pkgAcqMetaIndex(Owner, MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
"", IndexTargets, MetaIndexParser);
if (Cnf->LocalOnly == true ||
StringToBool(LookupTag(Message,"Transient-Failure"),false) == false)
{
// Ignore this
Status = StatDone;
Complete = false;
Dequeue();
return;
}
Item::Failed(Message,Cnf);
}
/*}}}*/
pkgAcqMetaIndex::pkgAcqMetaIndex(pkgAcquire *Owner, /*{{{*/
string URI,string URIDesc,string ShortDesc,
string SigFile,
const vector<struct IndexTarget*>* IndexTargets,
indexRecords* MetaIndexParser) :
Item(Owner), RealURI(URI), SigFile(SigFile), IndexTargets(IndexTargets),
MetaIndexParser(MetaIndexParser), AuthPass(false), IMSHit(false)
{
DestFile = _config->FindDir("Dir::State::lists") + "partial/";
DestFile += URItoFileName(URI);
// Create the item
Desc.Description = URIDesc;
Desc.Owner = this;
Desc.ShortDesc = ShortDesc;
Desc.URI = URI;
QueueURI(Desc);
}
/*}}}*/
// pkgAcqMetaIndex::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
/* The only header we use is the last-modified header. */
string pkgAcqMetaIndex::Custom600Headers()
{
string Final = _config->FindDir("Dir::State::lists");
Final += URItoFileName(RealURI);
struct stat Buf;
if (stat(Final.c_str(),&Buf) != 0)
return "\nIndex-File: true";
return "\nIndex-File: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
}
/*}}}*/
void pkgAcqMetaIndex::Done(string Message,unsigned long long Size,string Hash, /*{{{*/
pkgAcquire::MethodConfig *Cfg)
{
Item::Done(Message,Size,Hash,Cfg);
// MetaIndexes are done in two passes: one to download the
// metaindex with an appropriate method, and a second to verify it
// with the gpgv method
if (AuthPass == true)
{
AuthDone(Message);
// all cool, move Release file into place
Complete = true;
}
else
{
RetrievalDone(Message);
if (!Complete)
// Still more retrieving to do
return;
if (SigFile == "")
{
// There was no signature file, so we are finished. Download
// the indexes and do only hashsum verification if possible
MetaIndexParser->Load(DestFile);
QueueIndexes(false);
}
else
{
// There was a signature file, so pass it to gpgv for
// verification
if (_config->FindB("Debug::pkgAcquire::Auth", false))
std::cerr << "Metaindex acquired, queueing gpg verification ("
<< SigFile << "," << DestFile << ")\n";
AuthPass = true;
Desc.URI = "gpgv:" + SigFile;
QueueURI(Desc);
Mode = "gpgv";
return;
}
}
if (Complete == true)
{
string FinalFile = _config->FindDir("Dir::State::lists");
FinalFile += URItoFileName(RealURI);
if (SigFile == DestFile)
SigFile = FinalFile;
Rename(DestFile,FinalFile);
chmod(FinalFile.c_str(),0644);
DestFile = FinalFile;
}
}
/*}}}*/
void pkgAcqMetaIndex::RetrievalDone(string Message) /*{{{*/
{
// We have just finished downloading a Release file (it is not
// verified yet)
string FileName = LookupTag(Message,"Filename");
if (FileName.empty() == true)
{
Status = StatError;
ErrorText = "Method gave a blank filename";
return;
}
if (FileName != DestFile)
{
Local = true;
Desc.URI = "copy:" + FileName;
QueueURI(Desc);
return;
}
// make sure to verify against the right file on I-M-S hit
IMSHit = StringToBool(LookupTag(Message,"IMS-Hit"),false);
if(IMSHit)
{
string FinalFile = _config->FindDir("Dir::State::lists");
FinalFile += URItoFileName(RealURI);
if (SigFile == DestFile)
{
SigFile = FinalFile;
// constructor of pkgAcqMetaClearSig moved it out of the way,
// now move it back in on IMS hit for the 'old' file
string const OldClearSig = DestFile + ".reverify";
if (RealFileExists(OldClearSig) == true)
Rename(OldClearSig, FinalFile);
}
DestFile = FinalFile;
}
Complete = true;
}
/*}}}*/
void pkgAcqMetaIndex::AuthDone(string Message) /*{{{*/
{
// At this point, the gpgv method has succeeded, so there is a
// valid signature from a key in the trusted keyring. We
// perform additional verification of its contents, and use them
// to verify the indexes we are about to download
if (!MetaIndexParser->Load(DestFile))
{
Status = StatAuthError;
ErrorText = MetaIndexParser->ErrorText;
return;
}
if (!VerifyVendor(Message))
{
return;
}
if (_config->FindB("Debug::pkgAcquire::Auth", false))
std::cerr << "Signature verification succeeded: "
<< DestFile << std::endl;
// Download further indexes with verification
QueueIndexes(true);
// is it a clearsigned MetaIndex file?
if (DestFile == SigFile)
return;
// Done, move signature file into position
string VerifiedSigFile = _config->FindDir("Dir::State::lists") +
URItoFileName(RealURI) + ".gpg";
Rename(SigFile,VerifiedSigFile);
chmod(VerifiedSigFile.c_str(),0644);
}
/*}}}*/
void pkgAcqMetaIndex::QueueIndexes(bool verify) /*{{{*/
{
#if 0
/* Reject invalid, existing Release files (LP: #346386) (Closes: #627642)
* FIXME: Disabled; it breaks unsigned repositories without hashes */
if (!verify && FileExists(DestFile) && !MetaIndexParser->Load(DestFile))
{
Status = StatError;
ErrorText = MetaIndexParser->ErrorText;
return;
}
#endif
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 elseā€¦
if (k->find("Translation-") != std::string::npos)
{
transInRelease = true;
break;
}
}
for (vector <struct IndexTarget*>::const_iterator Target = IndexTargets->begin();
Target != IndexTargets->end();
++Target)
{
HashString ExpectedIndexHash;
const indexRecords::checkSum *Record = MetaIndexParser->Lookup((*Target)->MetaKey);
bool compressedAvailable = false;
if (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(string((*Target)->MetaKey).append(".").append(*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;
}
}
else
{
ExpectedIndexHash = Record->Hash;
if (_config->FindB("Debug::pkgAcquire::Auth", false))
{
std::cerr << "Queueing: " << (*Target)->URI << std::endl;
std::cerr << "Expected Hash: " << ExpectedIndexHash.toStr() << std::endl;
std::cerr << "For: " << Record->MetaKeyFilename << std::endl;
}
if (verify == true && ExpectedIndexHash.empty() == true && (*Target)->IsOptional() == false)
{
Status = StatAuthError;
strprintf(ErrorText, _("Unable to find hash sum for '%s' in Release file"), (*Target)->MetaKey.c_str());
return;
}
}
if ((*Target)->IsOptional() == true)
{
if ((*Target)->IsSubIndex() == true)
new pkgAcqSubIndex(Owner, (*Target)->URI, (*Target)->Description,
(*Target)->ShortDesc, ExpectedIndexHash);
else if (transInRelease == false || Record != NULL || compressedAvailable == true)
{
if (_config->FindB("Acquire::PDiffs",true) == true && transInRelease == true &&
MetaIndexParser->Exists(string((*Target)->MetaKey).append(".diff/Index")) == true)
new pkgAcqDiffIndex(Owner, (*Target)->URI, (*Target)->Description,
(*Target)->ShortDesc, ExpectedIndexHash);
else
new pkgAcqIndexTrans(Owner, *Target, ExpectedIndexHash, MetaIndexParser);
}
continue;
}
/* Queue Packages file (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(string((*Target)->MetaKey).append(".diff/Index")) == true))
new pkgAcqDiffIndex(Owner, (*Target)->URI, (*Target)->Description,
(*Target)->ShortDesc, ExpectedIndexHash);
else
new pkgAcqIndex(Owner, *Target, ExpectedIndexHash, MetaIndexParser);
}
}
/*}}}*/
bool pkgAcqMetaIndex::VerifyVendor(string Message) /*{{{*/
{
string::size_type pos;
// check for missing sigs (that where not fatal because otherwise we had
// bombed earlier)
string missingkeys;
string msg = _("There is no public key available for the "
"following key IDs:\n");
pos = Message.find("NO_PUBKEY ");
if (pos != std::string::npos)
{
string::size_type start = pos+strlen("NO_PUBKEY ");
string Fingerprint = Message.substr(start, Message.find("\n")-start);
missingkeys += (Fingerprint);
}
if(!missingkeys.empty())
_error->Warning("%s", string(msg+missingkeys).c_str());
string Transformed = MetaIndexParser->GetExpectedDist();
if (Transformed == "../project/experimental")
{
Transformed = "experimental";
}
pos = Transformed.rfind('/');
if (pos != string::npos)
{
Transformed = Transformed.substr(0, pos);
}
if (Transformed == ".")
{
Transformed = "";
}
if (_config->FindB("Acquire::Check-Valid-Until", true) == true &&
MetaIndexParser->GetValidUntil() > 0) {
time_t const invalid_since = time(NULL) - MetaIndexParser->GetValidUntil();
if (invalid_since > 0)
// TRANSLATOR: The first %s is the URL of the bad Release file, the second is
// the time since then the file is invalid - formated in the same way as in
// the download progress display (e.g. 7d 3h 42min 1s)
return _error->Error(
_("Release file for %s is expired (invalid since %s). "
"Updates for this repository will not be applied."),
RealURI.c_str(), TimeToStr(invalid_since).c_str());
}
if (_config->FindB("Debug::pkgAcquire::Auth", false))
{
std::cerr << "Got Codename: " << MetaIndexParser->GetDist() << std::endl;
std::cerr << "Expecting Dist: " << MetaIndexParser->GetExpectedDist() << std::endl;
std::cerr << "Transformed Dist: " << Transformed << std::endl;
}
if (MetaIndexParser->CheckDist(Transformed) == false)
{
// This might become fatal one day
// Status = StatAuthError;
// ErrorText = "Conflicting distribution; expected "
// + MetaIndexParser->GetExpectedDist() + " but got "
// + MetaIndexParser->GetDist();
// return false;
if (!Transformed.empty())
{
_error->Warning(_("Conflicting distribution: %s (expected %s but got %s)"),
Desc.Description.c_str(),
Transformed.c_str(),
MetaIndexParser->GetDist().c_str());
}
}
return true;
}
/*}}}*/
// pkgAcqMetaIndex::Failed - no Release file present or no signature file present /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcqMetaIndex::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
{
if (AuthPass == true)
{
// gpgv method failed, if we have a good signature
string LastGoodSigFile = _config->FindDir("Dir::State::lists").append("partial/").append(URItoFileName(RealURI));
if (DestFile != SigFile)
LastGoodSigFile.append(".gpg");
LastGoodSigFile.append(".reverify");
if(FileExists(LastGoodSigFile))
{
string VerifiedSigFile = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
if (DestFile != SigFile)
VerifiedSigFile.append(".gpg");
Rename(LastGoodSigFile, VerifiedSigFile);
Status = StatTransientNetworkError;
_error->Warning(_("An error occurred during the signature "
"verification. The repository is not updated "
"and the previous index files will be used. "
"GPG error: %s: %s\n"),
Desc.Description.c_str(),
LookupTag(Message,"Message").c_str());
RunScripts("APT::Update::Auth-Failure");
return;
} else if (LookupTag(Message,"Message").find("NODATA") != string::npos) {
/* Invalid signature file, reject (LP: #346386) (Closes: #627642) */
_error->Error(_("GPG error: %s: %s"),
Desc.Description.c_str(),
LookupTag(Message,"Message").c_str());
return;
} else {
_error->Warning(_("GPG error: %s: %s"),
Desc.Description.c_str(),
LookupTag(Message,"Message").c_str());
}
// gpgv method failed
ReportMirrorFailure("GPGFailure");
}
/* 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;
}
Rename(DestFile,FinalFile);
chmod(FinalFile.c_str(),0644);
DestFile = FinalFile;
}
// No Release file was present, or verification failed, so fall
// back to queueing Packages files without verification
QueueIndexes(false);
}
/*}}}*/
pkgAcqMetaClearSig::pkgAcqMetaClearSig(pkgAcquire *Owner, /*{{{*/
string const &URI, string const &URIDesc, string const &ShortDesc,
string const &MetaIndexURI, string const &MetaIndexURIDesc, string const &MetaIndexShortDesc,
string const &MetaSigURI, string const &MetaSigURIDesc, string const &MetaSigShortDesc,
const vector<struct IndexTarget*>* IndexTargets,
indexRecords* MetaIndexParser) :
pkgAcqMetaIndex(Owner, URI, URIDesc, ShortDesc, "", IndexTargets, MetaIndexParser),
MetaIndexURI(MetaIndexURI), MetaIndexURIDesc(MetaIndexURIDesc), MetaIndexShortDesc(MetaIndexShortDesc),
MetaSigURI(MetaSigURI), MetaSigURIDesc(MetaSigURIDesc), MetaSigShortDesc(MetaSigShortDesc)
{
SigFile = DestFile;
// keep the old InRelease around in case of transistent network errors
string const Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
if (RealFileExists(Final) == true)
{
string const LastGoodSig = DestFile + ".reverify";
Rename(Final,LastGoodSig);
}
}
/*}}}*/
pkgAcqMetaClearSig::~pkgAcqMetaClearSig() /*{{{*/
{
// if the file was never queued undo file-changes done in the constructor
if (QueueCounter == 1 && Status == StatIdle && FileSize == 0 && Complete == false)
{
string const Final = _config->FindDir("Dir::State::lists") + URItoFileName(RealURI);
string const LastGoodSig = DestFile + ".reverify";
if (RealFileExists(Final) == false && RealFileExists(LastGoodSig) == true)
Rename(LastGoodSig, Final);
}
}
/*}}}*/
// pkgAcqMetaClearSig::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
// FIXME: this can go away once the InRelease file is used widely
string pkgAcqMetaClearSig::Custom600Headers()
{
string Final = _config->FindDir("Dir::State::lists");
Final += URItoFileName(RealURI);
struct stat Buf;
if (stat(Final.c_str(),&Buf) != 0)
{
Final = DestFile + ".reverify";
if (stat(Final.c_str(),&Buf) != 0)
return "\nIndex-File: true\nFail-Ignore: true\n";
}
return "\nIndex-File: true\nFail-Ignore: true\nLast-Modified: " + TimeRFC1123(Buf.st_mtime);
}
/*}}}*/
void pkgAcqMetaClearSig::Failed(string Message,pkgAcquire::MethodConfig *Cnf) /*{{{*/
{
if (AuthPass == false)
{
// Remove the 'old' InRelease file if we try Release.gpg now as otherwise
// the file will stay around and gives a false-auth impression (CVE-2012-0214)
string FinalFile = _config->FindDir("Dir::State::lists");
FinalFile.append(URItoFileName(RealURI));
if (FileExists(FinalFile))
unlink(FinalFile.c_str());
new pkgAcqMetaSig(Owner,
MetaSigURI, MetaSigURIDesc, MetaSigShortDesc,
MetaIndexURI, MetaIndexURIDesc, MetaIndexShortDesc,
IndexTargets, MetaIndexParser);
if (Cnf->LocalOnly == true ||
StringToBool(LookupTag(Message, "Transient-Failure"), false) == false)
Dequeue();
}
else
pkgAcqMetaIndex::Failed(Message, Cnf);
}
/*}}}*/
// AcqArchive::AcqArchive - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* This just sets up the initial fetch environment and queues the first
possibilitiy */
pkgAcqArchive::pkgAcqArchive(pkgAcquire *Owner,pkgSourceList *Sources,
pkgRecords *Recs,pkgCache::VerIterator const &Version,
string &StoreFilename) :
Item(Owner), Version(Version), Sources(Sources), Recs(Recs),
StoreFilename(StoreFilename), Vf(Version.FileList()),
Trusted(false)
{
Retries = _config->FindI("Acquire::Retries",0);
if (Version.Arch() == 0)
{
_error->Error(_("I wasn't able to locate a file for the %s package. "
"This might mean you need to manually fix this package. "
"(due to missing arch)"),
Version.ParentPkg().Name());
return;
}
/* We need to find a filename to determine the extension. We make the
assumption here that all the available sources for this version share
the same extension.. */
// Skip not source sources, they do not have file fields.
for (; Vf.end() == false; ++Vf)
{
if ((Vf.File()->Flags & pkgCache::Flag::NotSource) != 0)
continue;
break;
}
// Does not really matter here.. we are going to fail out below
if (Vf.end() != true)
{
// If this fails to get a file name we will bomb out below.
pkgRecords::Parser &Parse = Recs->Lookup(Vf);
if (_error->PendingError() == true)
return;
// Generate the final file name as: package_version_arch.foo
StoreFilename = QuoteString(Version.ParentPkg().Name(),"_:") + '_' +
QuoteString(Version.VerStr(),"_:") + '_' +
QuoteString(Version.Arch(),"_:.") +
"." + flExtension(Parse.FileName());
}
// check if we have one trusted source for the package. if so, switch
// to "TrustedOnly" mode - but only if not in AllowUnauthenticated mode
bool const allowUnauth = _config->FindB("APT::Get::AllowUnauthenticated", false);
bool const debugAuth = _config->FindB("Debug::pkgAcquire::Auth", false);
bool seenUntrusted = false;
for (pkgCache::VerFileIterator i = Version.FileList(); i.end() == false; ++i)
{
pkgIndexFile *Index;
if (Sources->FindIndex(i.File(),Index) == false)
continue;
if (debugAuth == true)
std::cerr << "Checking index: " << Index->Describe()
<< "(Trusted=" << Index->IsTrusted() << ")" << std::endl;
if (Index->IsTrusted() == true)
{
Trusted = true;
if (allowUnauth == false)
break;
}
else
seenUntrusted = true;
}
// "allow-unauthenticated" restores apts old fetching behaviour
// that means that e.g. unauthenticated file:// uris are higher
// priority than authenticated http:// uris
if (allowUnauth == true && seenUntrusted == true)
Trusted = false;
// Select a source
if (QueueNext() == false && _error->PendingError() == false)
_error->Error(_("I wasn't able to locate a file for the %s package. "
"This might mean you need to manually fix this package."),
Version.ParentPkg().Name());
}
/*}}}*/
// AcqArchive::QueueNext - Queue the next file source /*{{{*/
// ---------------------------------------------------------------------
/* This queues the next available file version for download. It checks if
the archive is already available in the cache and stashs the MD5 for
checking later. */
bool pkgAcqArchive::QueueNext()
{
string const ForceHash = _config->Find("Acquire::ForceHash");
for (; Vf.end() == false; ++Vf)
{
// Ignore not source sources
if ((Vf.File()->Flags & pkgCache::Flag::NotSource) != 0)
continue;
// Try to cross match against the source list
pkgIndexFile *Index;
if (Sources->FindIndex(Vf.File(),Index) == false)
continue;
// only try to get a trusted package from another source if that source
// is also trusted
if(Trusted && !Index->IsTrusted())
continue;
// Grab the text package record
pkgRecords::Parser &Parse = Recs->Lookup(Vf);
if (_error->PendingError() == true)
return false;
string PkgFile = Parse.FileName();
if (ForceHash.empty() == false)
{
if(stringcasecmp(ForceHash, "sha512") == 0)
ExpectedHash = HashString("SHA512", Parse.SHA512Hash());
else if(stringcasecmp(ForceHash, "sha256") == 0)
ExpectedHash = HashString("SHA256", Parse.SHA256Hash());
else if (stringcasecmp(ForceHash, "sha1") == 0)
ExpectedHash = HashString("SHA1", Parse.SHA1Hash());
else
ExpectedHash = HashString("MD5Sum", Parse.MD5Hash());
}
else
{
string Hash;
if ((Hash = Parse.SHA512Hash()).empty() == false)
ExpectedHash = HashString("SHA512", Hash);
else if ((Hash = Parse.SHA256Hash()).empty() == false)
ExpectedHash = HashString("SHA256", Hash);
else if ((Hash = Parse.SHA1Hash()).empty() == false)
ExpectedHash = HashString("SHA1", Hash);
else
ExpectedHash = HashString("MD5Sum", Parse.MD5Hash());
}
if (PkgFile.empty() == true)
return _error->Error(_("The package index files are corrupted. No Filename: "
"field for package %s."),
Version.ParentPkg().Name());
Desc.URI = Index->ArchiveURI(PkgFile);
Desc.Description = Index->ArchiveInfo(Version);
Desc.Owner = this;
Desc.ShortDesc = Version.ParentPkg().Name();
// See if we already have the file. (Legacy filenames)
FileSize = Version->Size;
string FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(PkgFile);
struct stat Buf;
if (stat(FinalFile.c_str(),&Buf) == 0)
{
// Make sure the size matches
if ((unsigned long long)Buf.st_size == Version->Size)
{
Complete = true;
Local = true;
Status = StatDone;
StoreFilename = DestFile = FinalFile;
return true;
}
/* Hmm, we have a file and its size does not match, this means it is
an old style mismatched arch */
unlink(FinalFile.c_str());
}
// Check it again using the new style output filenames
FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(StoreFilename);
if (stat(FinalFile.c_str(),&Buf) == 0)
{
// Make sure the size matches
if ((unsigned long long)Buf.st_size == Version->Size)
{
Complete = true;
Local = true;
Status = StatDone;
StoreFilename = DestFile = FinalFile;
return true;
}
/* Hmm, we have a file and its size does not match, this shouldnt
happen.. */
unlink(FinalFile.c_str());
}
DestFile = _config->FindDir("Dir::Cache::Archives") + "partial/" + flNotDir(StoreFilename);
// Check the destination file
if (stat(DestFile.c_str(),&Buf) == 0)
{
// Hmm, the partial file is too big, erase it
if ((unsigned long long)Buf.st_size > Version->Size)
unlink(DestFile.c_str());
else
PartialSize = Buf.st_size;
}
// Disables download of archives - useful if no real installation follows,
// e.g. if we are just interested in proposed installation order
if (_config->FindB("Debug::pkgAcqArchive::NoQueue", false) == true)
{
Complete = true;
Local = true;
Status = StatDone;
StoreFilename = DestFile = FinalFile;
return true;
}
// Create the item
Local = false;
Desc.URI = Index->ArchiveURI(PkgFile);
Desc.Description = Index->ArchiveInfo(Version);
Desc.Owner = this;
Desc.ShortDesc = Version.ParentPkg().Name();
QueueURI(Desc);
++Vf;
return true;
}
return false;
}
/*}}}*/
// AcqArchive::Done - Finished fetching /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcqArchive::Done(string Message,unsigned long long Size,string CalcHash,
pkgAcquire::MethodConfig *Cfg)
{
Item::Done(Message,Size,CalcHash,Cfg);
// Check the size
if (Size != Version->Size)
{
RenameOnError(SizeMismatch);
return;
}
// Check the hash
if(ExpectedHash.toStr() != CalcHash)
{
RenameOnError(HashSumMismatch);
return;
}
// Grab the output filename
string FileName = LookupTag(Message,"Filename");
if (FileName.empty() == true)
{
Status = StatError;
ErrorText = "Method gave a blank filename";
return;
}
Complete = true;
// Reference filename
if (FileName != DestFile)
{
StoreFilename = DestFile = FileName;
Local = true;
return;
}
// Done, move it into position
string FinalFile = _config->FindDir("Dir::Cache::Archives");
FinalFile += flNotDir(StoreFilename);
Rename(DestFile,FinalFile);
StoreFilename = DestFile = FinalFile;
Complete = true;
}
/*}}}*/
// AcqArchive::Failed - Failure handler /*{{{*/
// ---------------------------------------------------------------------
/* Here we try other sources */
void pkgAcqArchive::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
{
ErrorText = LookupTag(Message,"Message");
/* We don't really want to retry on failed media swaps, this prevents
that. An interesting observation is that permanent failures are not
recorded. */
if (Cnf->Removable == true &&
StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
{
// Vf = Version.FileList();
while (Vf.end() == false) ++Vf;
StoreFilename = string();
Item::Failed(Message,Cnf);
return;
}
if (QueueNext() == false)
{
// This is the retry counter
if (Retries != 0 &&
Cnf->LocalOnly == false &&
StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
{
Retries--;
Vf = Version.FileList();
if (QueueNext() == true)
return;
}
StoreFilename = string();
Item::Failed(Message,Cnf);
}
}
/*}}}*/
// AcqArchive::IsTrusted - Determine whether this archive comes from a trusted source /*{{{*/
// ---------------------------------------------------------------------
bool pkgAcqArchive::IsTrusted()
{
return Trusted;
}
/*}}}*/
// AcqArchive::Finished - Fetching has finished, tidy up /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcqArchive::Finished()
{
if (Status == pkgAcquire::Item::StatDone &&
Complete == true)
return;
StoreFilename = string();
}
/*}}}*/
// AcqFile::pkgAcqFile - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* The file is added to the queue */
pkgAcqFile::pkgAcqFile(pkgAcquire *Owner,string URI,string Hash,
unsigned long long Size,string Dsc,string ShortDesc,
const string &DestDir, const string &DestFilename,
bool IsIndexFile) :
Item(Owner), ExpectedHash(Hash), IsIndexFile(IsIndexFile)
{
Retries = _config->FindI("Acquire::Retries",0);
if(!DestFilename.empty())
DestFile = DestFilename;
else if(!DestDir.empty())
DestFile = DestDir + "/" + flNotDir(URI);
else
DestFile = flNotDir(URI);
// Create the item
Desc.URI = URI;
Desc.Description = Dsc;
Desc.Owner = this;
// Set the short description to the archive component
Desc.ShortDesc = ShortDesc;
// Get the transfer sizes
FileSize = Size;
struct stat Buf;
if (stat(DestFile.c_str(),&Buf) == 0)
{
// Hmm, the partial file is too big, erase it
if ((unsigned long long)Buf.st_size > Size)
unlink(DestFile.c_str());
else
PartialSize = Buf.st_size;
}
QueueURI(Desc);
}
/*}}}*/
// AcqFile::Done - Item downloaded OK /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgAcqFile::Done(string Message,unsigned long long Size,string CalcHash,
pkgAcquire::MethodConfig *Cnf)
{
Item::Done(Message,Size,CalcHash,Cnf);
// Check the hash
if(!ExpectedHash.empty() && ExpectedHash.toStr() != CalcHash)
{
RenameOnError(HashSumMismatch);
return;
}
string FileName = LookupTag(Message,"Filename");
if (FileName.empty() == true)
{
Status = StatError;
ErrorText = "Method gave a blank filename";
return;
}
Complete = true;
// The files timestamp matches
if (StringToBool(LookupTag(Message,"IMS-Hit"),false) == true)
return;
// We have to copy it into place
if (FileName != DestFile)
{
Local = true;
if (_config->FindB("Acquire::Source-Symlinks",true) == false ||
Cnf->Removable == true)
{
Desc.URI = "copy:" + FileName;
QueueURI(Desc);
return;
}
// Erase the file if it is a symlink so we can overwrite it
struct stat St;
if (lstat(DestFile.c_str(),&St) == 0)
{
if (S_ISLNK(St.st_mode) != 0)
unlink(DestFile.c_str());
}
// Symlink the file
if (symlink(FileName.c_str(),DestFile.c_str()) != 0)
{
ErrorText = "Link to " + DestFile + " failure ";
Status = StatError;
Complete = false;
}
}
}
/*}}}*/
// AcqFile::Failed - Failure handler /*{{{*/
// ---------------------------------------------------------------------
/* Here we try other sources */
void pkgAcqFile::Failed(string Message,pkgAcquire::MethodConfig *Cnf)
{
ErrorText = LookupTag(Message,"Message");
// This is the retry counter
if (Retries != 0 &&
Cnf->LocalOnly == false &&
StringToBool(LookupTag(Message,"Transient-Failure"),false) == true)
{
Retries--;
QueueURI(Desc);
return;
}
Item::Failed(Message,Cnf);
}
/*}}}*/
// AcqIndex::Custom600Headers - Insert custom request headers /*{{{*/
// ---------------------------------------------------------------------
/* The only header we use is the last-modified header. */
string pkgAcqFile::Custom600Headers()
{
if (IsIndexFile)
return "\nIndex-File: true";
return "";
}
/*}}}*/