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truncates filenames that are too long (#412)

This commit is contained in:
Arvid Norberg 2008-11-17 08:01:35 +00:00
parent 9406a8e08b
commit 30c0525ed5
1 changed files with 27 additions and 1 deletions
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28
src/torrent_info.cpp
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@ -156,6 +156,24 @@ namespace
if (!valid_encoding) target.path = tmp_path;
}
void trim_path_element(std::string& path_element)
{
if (path_element.size() > NAME_MAX)
{
// truncate filenames that are too long. But keep extensions!
std::string ext = fs::extension(path_element);
if (ext.size() > 15)
{
path_element.resize(NAME_MAX);
}
else
{
path_element.resize(NAME_MAX - ext.size());
path_element += ext;
}
}
}
bool extract_single_file(lazy_entry const& dict, file_entry& target
, std::string const& root_dir)
{
@ -181,6 +199,7 @@ namespace
if (p->list_at(i)->type() != lazy_entry::string_t)
return false;
std::string path_element = p->list_at(i)->string_value();
trim_path_element(path_element);
if (path_element != "..")
target.path /= path_element;
}
@ -402,6 +421,7 @@ namespace libtorrent
if (tmp.is_complete())
{
name = tmp.leaf();
trim_path_element(name);
}
#if BOOST_VERSION < 103600
else if (tmp.has_branch_path())
@ -414,10 +434,16 @@ namespace libtorrent
, end(tmp.end()); i != end; ++i)
{
if (*i == "." || *i == "..") continue;
p /= *i;
std::string path_element = *i;
trim_path_element(path_element);
p /= path_element;
}
name = p.string();
}
else
{
trim_path_element(name);
}
if (name == ".." || name == ".")
{
error = "invalid 'name' of torrent (possible exploit attempt)";