mirror of
https://github.com/zerotier/ZeroTierOne.git
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125 lines
3.6 KiB
C++
125 lines
3.6 KiB
C++
/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 ZeroTier Networks LLC
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef _ZT_ELLIPTICCURVEKEY_H
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#define _ZT_ELLIPTICCURVEKEY_H
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#include <string>
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#include <algorithm>
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#include <string.h>
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#include "Utils.hpp"
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/**
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* Key type ID for identifying our use of NIST-P-521
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*
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* If in the future other types of keys are supported (post-quantum crypto?)
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* then we'll need a key type 2, etc. When keys are stored in the database
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* they are prefixed by this key type ID byte.
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*/
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#define ZT_KEY_TYPE 1
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#define ZT_EC_OPENSSL_CURVE NID_secp521r1
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#define ZT_EC_CURVE_NAME "NIST-P-521"
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#define ZT_EC_PRIME_BYTES 66
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#define ZT_EC_PUBLIC_KEY_BYTES (ZT_EC_PRIME_BYTES + 1)
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#define ZT_EC_PRIVATE_KEY_BYTES ZT_EC_PRIME_BYTES
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#define ZT_EC_MAX_BYTES ZT_EC_PUBLIC_KEY_BYTES
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namespace ZeroTier {
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class EllipticCurveKeyPair;
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/**
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* An elliptic curve public or private key
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*/
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class EllipticCurveKey
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{
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friend class EllipticCurveKeyPair;
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public:
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EllipticCurveKey()
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throw() :
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_bytes(0)
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{
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}
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EllipticCurveKey(const void *data,unsigned int len)
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throw()
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{
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if (len <= ZT_EC_MAX_BYTES) {
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_bytes = len;
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memcpy(_key,data,len);
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} else _bytes = 0;
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}
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EllipticCurveKey(const EllipticCurveKey &k)
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throw()
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{
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_bytes = k._bytes;
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memcpy(_key,k._key,_bytes);
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}
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inline EllipticCurveKey &operator=(const EllipticCurveKey &k)
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throw()
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{
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_bytes = k._bytes;
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memcpy(_key,k._key,_bytes);
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return *this;
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}
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inline void set(const void *data,unsigned int len)
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throw()
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{
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if (len <= ZT_EC_MAX_BYTES) {
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_bytes = len;
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memcpy(_key,data,len);
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} else _bytes = 0;
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}
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inline const unsigned char *data() const throw() { return _key; }
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inline unsigned int size() const throw() { return _bytes; }
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inline std::string toHex() const throw() { return Utils::hex(_key,_bytes); }
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inline unsigned char operator[](const unsigned int i) const throw() { return _key[i]; }
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inline bool operator==(const EllipticCurveKey &k) const throw() { return ((_bytes == k._bytes)&&(!memcmp(_key,k._key,_bytes))); }
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inline bool operator<(const EllipticCurveKey &k) const throw() { return std::lexicographical_compare(_key,&_key[_bytes],k._key,&k._key[k._bytes]); }
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inline bool operator!=(const EllipticCurveKey &k) const throw() { return !(*this == k); }
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inline bool operator>(const EllipticCurveKey &k) const throw() { return (k < *this); }
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inline bool operator<=(const EllipticCurveKey &k) const throw() { return !(k < *this); }
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inline bool operator>=(const EllipticCurveKey &k) const throw() { return !(*this < k); }
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private:
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unsigned int _bytes;
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unsigned char _key[ZT_EC_MAX_BYTES];
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};
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} // namespace ZeroTier
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#endif
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