/* * Copyright (c) 2012-2013 Remko Tronçon * Licensed under the GNU General Public License v3. * See Documentation/Licenses/GPLv3.txt for more information. */ #include <Swiften/IDN/LibIDNConverter.h> extern "C" { #include <stringprep.h> #include <idna.h> } #include <vector> #include <cassert> #include <cstdlib> #include <Swiften/Base/ByteArray.h> #include <Swiften/Base/SafeAllocator.h> #include <boost/shared_ptr.hpp> using namespace Swift; namespace { static const int MAX_STRINGPREP_SIZE = 1024; const Stringprep_profile* getLibIDNProfile(IDNConverter::StringPrepProfile profile) { switch(profile) { case IDNConverter::NamePrep: return stringprep_nameprep; case IDNConverter::XMPPNodePrep: return stringprep_xmpp_nodeprep; case IDNConverter::XMPPResourcePrep: return stringprep_xmpp_resourceprep; case IDNConverter::SASLPrep: return stringprep_saslprep; } assert(false); return 0; } template<typename StringType, typename ContainerType> ContainerType getStringPreparedInternal(const StringType& s, IDNConverter::StringPrepProfile profile) { ContainerType input(s.begin(), s.end()); input.resize(MAX_STRINGPREP_SIZE); if (stringprep(&input[0], MAX_STRINGPREP_SIZE, static_cast<Stringprep_profile_flags>(0), getLibIDNProfile(profile)) == 0) { return input; } else { return ContainerType(); } } } namespace Swift { std::string LibIDNConverter::getStringPrepared(const std::string& s, StringPrepProfile profile) { std::vector<char> preparedData = getStringPreparedInternal< std::string, std::vector<char> >(s, profile); if (preparedData.empty()) { throw std::exception(); } return std::string(vecptr(preparedData)); } SafeByteArray LibIDNConverter::getStringPrepared(const SafeByteArray& s, StringPrepProfile profile) { std::vector<char, SafeAllocator<char> > preparedData = getStringPreparedInternal<SafeByteArray, std::vector<char, SafeAllocator<char> > >(s, profile); if (preparedData.empty()) { throw std::exception(); } return createSafeByteArray(reinterpret_cast<const char*>(vecptr(preparedData))); } std::string LibIDNConverter::getIDNAEncoded(const std::string& domain) { char* output; if (idna_to_ascii_8z(domain.c_str(), &output, 0) == IDNA_SUCCESS) { std::string result(output); free(output); return result; } else { return domain; } } }