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125 lines
3.6 KiB
125 lines
3.6 KiB
/* |
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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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memset(_key,0,sizeof(_key)); |
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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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