mirror of
https://github.com/zerotier/ZeroTierOne.git
synced 2024-12-25 15:41:05 +00:00
129 lines
3.8 KiB
C++
129 lines
3.8 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_ELLIPTICCURVEKEYPAIR_HPP
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#define _ZT_ELLIPTICCURVEKEYPAIR_HPP
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#include <string>
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#include "EllipticCurveKey.hpp"
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namespace ZeroTier {
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/**
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* An elliptic curve key pair supporting generation and key agreement
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*/
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class EllipticCurveKeyPair
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{
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public:
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EllipticCurveKeyPair();
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EllipticCurveKeyPair(const EllipticCurveKeyPair &pair);
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EllipticCurveKeyPair(const EllipticCurveKey &pubk,const EllipticCurveKey &privk);
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~EllipticCurveKeyPair();
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const EllipticCurveKeyPair &operator=(const EllipticCurveKeyPair &pair);
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/**
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* Fill this structure with a newly generated public/private key pair
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*
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* @return True if key generation is successful
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*/
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bool generate();
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/**
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* Perform elliptic curve key agreement
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*
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* @param theirPublicKey Remote side's public key
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* @param agreedUponKey Buffer to fill with agreed-upon symmetric key
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* @param agreedUponKeyLength Number of bytes to generate
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* @return True if key agreement is successful
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*/
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bool agree(const EllipticCurveKey &theirPublicKey,unsigned char *agreedUponKey,unsigned int agreedUponKeyLength) const;
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/**
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* Sign a SHA256 hash
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*
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* @param sha256 Pointer to 256-bit / 32-byte SHA hash to sign
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* @return ECDSA signature (r and s in binary format, each prefixed by an 8-bit size)
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*/
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std::string sign(const void *sha256) const;
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/**
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* Sign something with this pair's private key, computing its hash first
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*
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* @param data Data to hash and sign
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* @param len Length of data
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* @return Signature bytes
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*/
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std::string sign(const void *data,unsigned int len) const;
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/**
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* Verify a signature
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*
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* @param sha256 Pointer to 256-bit / 32-byte SHA hash to verify
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* @param pk Public key to verify against
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* @param sigbytes Signature bytes
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* @param siglen Length of signature
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*/
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static bool verify(const void *sha256,const EllipticCurveKey &pk,const void *sigbytes,unsigned int siglen);
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/**
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* Verify a signature
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*
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* @param data Data to verify
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* @param len Length of data
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* @param pk Public key to verify against
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* @param sigbytes Signature bytes
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* @param siglen Length of signature
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*/
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static bool verify(const void *data,unsigned int len,const EllipticCurveKey &pk,const void *sigbytes,unsigned int siglen);
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inline bool operator==(const EllipticCurveKeyPair &kp) const
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throw()
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{
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return ((_pub == kp._pub)&&(_priv == kp._priv));
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}
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inline bool operator!=(const EllipticCurveKeyPair &kp) const
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throw()
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{
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return ((_pub != kp._pub)||(_priv != kp._priv));
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}
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inline const EllipticCurveKey &pub() const throw() { return _pub; }
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inline const EllipticCurveKey &priv() const throw() { return _priv; }
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private:
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bool initInternalKey();
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EllipticCurveKey _pub;
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EllipticCurveKey _priv;
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void *_internal_key;
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};
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} // namespace ZeroTier
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#endif
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