New git repository for release - version 0.2.0 tagged

node/EllipticCurveKey.hpp

@@ -0,0 +1,124 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2012-2013  ZeroTier Networks LLC
+ *
+ * This program 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, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+#ifndef _ZT_ELLIPTICCURVEKEY_H
+#define _ZT_ELLIPTICCURVEKEY_H
+
+#include <string>
+#include <algorithm>
+#include <string.h>
+#include "Utils.hpp"
+
+/**
+ * Key type ID for identifying our use of NIST-P-521
+ *
+ * If in the future other types of keys are supported (post-quantum crypto?)
+ * then we'll need a key type 2, etc. When keys are stored in the database
+ * they are prefixed by this key type ID byte.
+ */
+#define ZT_KEY_TYPE 1
+
+#define ZT_EC_OPENSSL_CURVE NID_secp521r1
+#define ZT_EC_CURVE_NAME "NIST-P-521"
+#define ZT_EC_PRIME_BYTES 66
+#define ZT_EC_PUBLIC_KEY_BYTES (ZT_EC_PRIME_BYTES + 1)
+#define ZT_EC_PRIVATE_KEY_BYTES ZT_EC_PRIME_BYTES
+#define ZT_EC_MAX_BYTES ZT_EC_PUBLIC_KEY_BYTES
+
+namespace ZeroTier {
+
+class EllipticCurveKeyPair;
+
+/**
+ * An elliptic curve public or private key
+ */
+class EllipticCurveKey
+{
+	friend class EllipticCurveKeyPair;
+
+public:
+	EllipticCurveKey()
+		throw() :
+		_bytes(0)
+	{
+	}
+
+	EllipticCurveKey(const void *data,unsigned int len)
+		throw()
+	{
+		if (len <= ZT_EC_MAX_BYTES) {
+			_bytes = len;
+			memcpy(_key,data,len);
+		} else _bytes = 0;
+	}
+
+	EllipticCurveKey(const EllipticCurveKey &k)
+		throw()
+	{
+		_bytes = k._bytes;
+		memcpy(_key,k._key,_bytes);
+	}
+
+	inline EllipticCurveKey &operator=(const EllipticCurveKey &k)
+		throw()
+	{
+		_bytes = k._bytes;
+		memcpy(_key,k._key,_bytes);
+		return *this;
+	}
+
+	inline void set(const void *data,unsigned int len)
+		throw()
+	{
+		if (len <= ZT_EC_MAX_BYTES) {
+			_bytes = len;
+			memcpy(_key,data,len);
+		} else _bytes = 0;
+	}
+
+	inline const unsigned char *data() const throw() { return _key; }
+	inline unsigned int size() const throw() { return _bytes; }
+	inline std::string toHex() const throw() { return Utils::hex(_key,_bytes); }
+
+	inline unsigned char operator[](const unsigned int i) const throw() { return _key[i]; }
+
+	inline bool operator==(const EllipticCurveKey &k) const throw() { return ((_bytes == k._bytes)&&(!memcmp(_key,k._key,_bytes))); }
+	inline bool operator<(const EllipticCurveKey &k) const throw() { return std::lexicographical_compare(_key,&_key[_bytes],k._key,&k._key[k._bytes]); }
+	inline bool operator!=(const EllipticCurveKey &k) const throw() { return !(*this == k); }
+	inline bool operator>(const EllipticCurveKey &k) const throw() { return (k < *this); }
+	inline bool operator<=(const EllipticCurveKey &k) const throw() { return !(k < *this); }
+	inline bool operator>=(const EllipticCurveKey &k) const throw() { return !(*this < k); }
+
+private:
+	unsigned int _bytes;
+	unsigned char _key[ZT_EC_MAX_BYTES];
+};
+
+} // namespace ZeroTier
+
+#endif
+