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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
netrc file parser - returns the login and password of a give host in
a specified netrc-type file
Originally written by Daniel Stenberg, <daniel@haxx.se>, et al. and
placed into the Public Domain, do with it what you will.
##################################################################### */
/*}}}*/
#include <config.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/strutl.h>
#include <iostream>
#include "netrc.h"
/* Get user and password from .netrc when given a machine name */
bool MaybeAddAuth(FileFd &NetRCFile, URI &Uri)
{
if (Uri.User.empty() == false || Uri.Password.empty() == false)
return true;
if (NetRCFile.IsOpen() == false || NetRCFile.Failed())
return false;
auto const Debug = _config->FindB("Debug::Acquire::netrc", false);
std::string lookfor;
if (Uri.Port != 0)
strprintf(lookfor, "%s:%i%s", Uri.Host.c_str(), Uri.Port, Uri.Path.c_str());
else
lookfor.append(Uri.Host).append(Uri.Path);
enum
{
NO,
MACHINE,
GOOD_MACHINE,
LOGIN,
PASSWORD
} active_token = NO;
std::string line;
while (NetRCFile.Eof() == false || line.empty() == false)
{
if (line.empty())
{
if (NetRCFile.ReadLine(line) == false)
break;
else if (line.empty())
continue;
}
auto tokenend = line.find_first_of("\t ");
std::string token;
if (tokenend != std::string::npos)
{
token = line.substr(0, tokenend);
line.erase(0, tokenend + 1);
}
else
std::swap(line, token);
if (token.empty())
continue;
switch (active_token)
{
case NO:
if (token == "machine")
active_token = MACHINE;
break;
case MACHINE:
// If token contains a protocol: Check it first, and strip it away if
// it matches. If it does not match, ignore this stanza.
// If there is no protocol, only allow https protocols.
if (token.find("://") != std::string::npos)
{
if (not APT::String::Startswith(token, Uri.Access + "://"))
{
active_token = NO;
break;
}
token.erase(0, Uri.Access.length() + 3);
}
else if (Uri.Access != "https" && Uri.Access != "tor+https")
{
if (Debug)
std::clog << "MaybeAddAuth: Rejecting matching host adding '" << Uri.User << "' and '" << Uri.Password << "' for "
<< (std::string)Uri << " from " << NetRCFile.Name() << "as the protocol is not https" << std::endl;
active_token = NO;
break;
}
if (token.find('/') == std::string::npos)
{
if (Uri.Port != 0 && Uri.Host == token)
active_token = GOOD_MACHINE;
else if (lookfor.compare(0, lookfor.length() - Uri.Path.length(), token) == 0)
active_token = GOOD_MACHINE;
else
active_token = NO;
}
else
{
if (APT::String::Startswith(lookfor, token))
active_token = GOOD_MACHINE;
else
active_token = NO;
}
break;
case GOOD_MACHINE:
if (token == "login")
active_token = LOGIN;
else if (token == "password")
active_token = PASSWORD;
else if (token == "machine")
{
if (Debug)
std::clog << "MaybeAddAuth: Found matching host adding '" << Uri.User << "' and '" << Uri.Password << "' for "
<< (std::string)Uri << " from " << NetRCFile.Name() << std::endl;
return true;
}
break;
case LOGIN:
std::swap(Uri.User, token);
active_token = GOOD_MACHINE;
break;
case PASSWORD:
std::swap(Uri.Password, token);
active_token = GOOD_MACHINE;
break;
}
}
if (active_token == GOOD_MACHINE)
{
if (Debug)
std::clog << "MaybeAddAuth: Found matching host adding '" << Uri.User << "' and '" << Uri.Password << "' for "
<< (std::string)Uri << " from " << NetRCFile.Name() << std::endl;
return true;
}
else if (active_token == NO)
{
if (Debug)
std::clog << "MaybeAddAuth: Found no matching host for "
<< (std::string)Uri << " from " << NetRCFile.Name() << std::endl;
return true;
}
else if (Debug)
{
std::clog << "MaybeAddAuth: Found no matching host (syntax error: token:";
switch (active_token)
{
case NO: std::clog << "NO"; break;
case MACHINE: std::clog << "MACHINE"; break;
case GOOD_MACHINE: std::clog << "GOOD_MACHINE"; break;
case LOGIN: std::clog << "LOGIN"; break;
case PASSWORD: std::clog << "PASSWORD"; break;
}
std::clog << ") for " << (std::string)Uri << " from " << NetRCFile.Name() << std::endl;
}
return false;
}
/* Check if we are authorized. */
bool IsAuthorized(pkgCache::PkgFileIterator const I, std::vector<std::unique_ptr<FileFd>> &authconfs)
{
if (authconfs.empty())
{
_error->PushToStack();
auto const netrc = _config->FindFile("Dir::Etc::netrc");
if (not netrc.empty())
{
authconfs.emplace_back(new FileFd());
authconfs.back()->Open(netrc, FileFd::ReadOnly);
}
auto const netrcparts = _config->FindDir("Dir::Etc::netrcparts");
if (not netrcparts.empty())
{
for (auto const &netrc : GetListOfFilesInDir(netrcparts, "conf", true, true))
{
authconfs.emplace_back(new FileFd());
authconfs.back()->Open(netrc, FileFd::ReadOnly);
}
}
_error->RevertToStack();
}
// FIXME: Use the full base url
URI uri(std::string("https://") + I.Site() + "/");
for (auto &authconf : authconfs)
{
if (not authconf->IsOpen())
continue;
if (not authconf->Seek(0))
continue;
MaybeAddAuth(*authconf, uri);
if (not uri.User.empty() || not uri.Password.empty())
return true;
}
return false;
}
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