1 files changed, 72 insertions, 0 deletions
diff --git a/include/modules/hash.h b/include/modules/hash.h
new file mode 100644
index 000000000..7d46ee74a
--- /dev/null
+++ b/include/modules/hash.h
@@ -0,0 +1,72 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2010 Daniel De Graaf <danieldg@inspircd.org>
+ *
+ * This file is part of InspIRCd.  InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#include "modules.h"
+
+class HashProvider : public DataProvider
+{
+ public:
+	const unsigned int out_size;
+	const unsigned int block_size;
+	HashProvider(Module* mod, const std::string& Name, unsigned int osiz = 0, unsigned int bsiz = 0)
+		: DataProvider(mod, "hash/" + Name), out_size(osiz), block_size(bsiz)
+	{
+	}
+
+	virtual std::string GenerateRaw(const std::string& data) = 0;
+
+	virtual std::string ToPrintable(const std::string& raw)
+	{
+		return BinToHex(raw);
+	}
+
+	virtual bool Compare(const std::string& input, const std::string& hash)
+	{
+		return InspIRCd::TimingSafeCompare(Generate(input), hash);
+	}
+
+	std::string Generate(const std::string& data)
+	{
+		return ToPrintable(GenerateRaw(data));
+	}
+
+	/** HMAC algorithm, RFC 2104 */
+	std::string hmac(const std::string& key, const std::string& msg)
+	{
+		std::string hmac1, hmac2;
+		std::string kbuf = key.length() > block_size ? GenerateRaw(key) : key;
+		kbuf.resize(block_size);
+
+		for (size_t n = 0; n < block_size; n++)
+		{
+			hmac1.push_back(static_cast<char>(kbuf[n] ^ 0x5C));
+			hmac2.push_back(static_cast<char>(kbuf[n] ^ 0x36));
+		}
+		hmac2.append(msg);
+		hmac1.append(GenerateRaw(hmac2));
+		return GenerateRaw(hmac1);
+	}
+
+	bool IsKDF() const
+	{
+		return (!block_size);
+	}
+};