mirror of
https://github.com/zerotier/ZeroTierOne.git
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111 lines
3.6 KiB
C++
111 lines
3.6 KiB
C++
/*
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* Copyright (c)2013-2020 ZeroTier, Inc.
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file in the project's root directory.
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*
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* Change Date: 2024-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2.0 of the Apache License.
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*/
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/****/
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#ifndef ZT_FINGERPRINT_HPP
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#define ZT_FINGERPRINT_HPP
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#include "Constants.hpp"
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#include "TriviallyCopyable.hpp"
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#include "Address.hpp"
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#include "Utils.hpp"
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#include <algorithm>
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#define ZT_FINGERPRINT_STRING_BUFFER_LENGTH 96
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namespace ZeroTier {
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class Identity;
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/**
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* Address and full hash of an identity's public keys.
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*
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* This is the same size as ZT_Fingerprint and should be cast-able back and forth.
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* This is checked in Tests.cpp.
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*/
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class Fingerprint : public TriviallyCopyable
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{
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friend class Identity;
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public:
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/**
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* Create an empty/nil fingerprint
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*/
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ZT_INLINE Fingerprint() noexcept { memoryZero(this); }
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/**
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* Create a Fingerprint that is a copy of the external API companion structure
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*
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* @param apifp API fingerprint
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*/
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ZT_INLINE Fingerprint(const ZT_Fingerprint &apifp) noexcept { Utils::copy<sizeof(ZT_Fingerprint)>(&m_cfp,&apifp); }
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ZT_INLINE Address address() const noexcept { return Address(m_cfp.address); }
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ZT_INLINE const uint8_t *hash() const noexcept { return m_cfp.hash; }
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ZT_INLINE ZT_Fingerprint *apiFingerprint() noexcept { return &m_cfp; }
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ZT_INLINE const ZT_Fingerprint *apiFingerprint() const noexcept { return &m_cfp; }
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/**
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* @return True if hash is not all zero (missing/unspecified)
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*/
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ZT_INLINE bool haveHash() const noexcept { return (!Utils::allZero(m_cfp.hash, sizeof(m_cfp.hash))); }
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/**
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* Get a base32-encoded representation of this fingerprint
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*
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* @param s Base32 string
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*/
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ZT_INLINE void toString(char s[ZT_FINGERPRINT_STRING_BUFFER_LENGTH]) const noexcept
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{
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uint8_t tmp[48 + 5];
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address().copyTo(tmp);
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Utils::copy<48>(tmp + 5, m_cfp.hash);
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Utils::b32e(tmp,sizeof(tmp),s,ZT_FINGERPRINT_STRING_BUFFER_LENGTH);
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s[ZT_FINGERPRINT_STRING_BUFFER_LENGTH-1] = 0; // sanity check, ensure always zero terminated
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}
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/**
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* Set this fingerprint to a base32-encoded string
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*
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* @param s String to decode
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* @return True if string appears to be valid and of the proper length (no other checking is done)
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*/
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ZT_INLINE bool fromString(const char *s) noexcept
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{
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uint8_t tmp[48 + 5];
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if (Utils::b32d(s,tmp,sizeof(tmp)) != sizeof(tmp))
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return false;
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m_cfp.address = Address(tmp).toInt();
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Utils::copy<48>(m_cfp.hash, tmp + 5);
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return true;
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}
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ZT_INLINE void zero() noexcept { memoryZero(this); }
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ZT_INLINE unsigned long hashCode() const noexcept { return (unsigned long)m_cfp.address; }
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ZT_INLINE operator bool() const noexcept { return (m_cfp.address != 0); }
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ZT_INLINE bool operator==(const Fingerprint &h) const noexcept { return ((m_cfp.address == h.m_cfp.address) && (memcmp(m_cfp.hash, h.m_cfp.hash, ZT_FINGERPRINT_HASH_SIZE) == 0)); }
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ZT_INLINE bool operator!=(const Fingerprint &h) const noexcept { return !(*this == h); }
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ZT_INLINE bool operator<(const Fingerprint &h) const noexcept { return ((m_cfp.address < h.m_cfp.address) || ((m_cfp.address == h.m_cfp.address) && (memcmp(m_cfp.hash, h.m_cfp.hash, ZT_FINGERPRINT_HASH_SIZE) < 0))); }
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ZT_INLINE bool operator>(const Fingerprint &h) const noexcept { return (h < *this); }
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ZT_INLINE bool operator<=(const Fingerprint &h) const noexcept { return !(h < *this); }
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ZT_INLINE bool operator>=(const Fingerprint &h) const noexcept { return !(*this < h); }
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private:
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ZT_Fingerprint m_cfp;
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};
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} // namespace ZeroTier
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#endif
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