1 files changed, 80 insertions, 0 deletions
diff --git a/Swiften/IDN/LibIDNConverter.cpp b/Swiften/IDN/LibIDNConverter.cpp
new file mode 100644
index 0000000..c4a1c18
--- /dev/null
+++ b/Swiften/IDN/LibIDNConverter.cpp
@@ -0,0 +1,80 @@
+/*
+ * 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;
+	}
+}
+
+}