mirror of
https://github.com/zerotier/ZeroTierOne.git
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104 lines
3.3 KiB
C++
104 lines
3.3 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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ZT_INLINE Address address() const noexcept { return Address(_fp.address); }
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ZT_INLINE const uint8_t *hash() const noexcept { return _fp.hash; }
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ZT_INLINE ZT_Fingerprint *apiFingerprint() noexcept { return &_fp; }
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ZT_INLINE const ZT_Fingerprint *apiFingerprint() const noexcept { return &_fp; }
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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(_fp.hash,sizeof(_fp.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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memcpy(tmp + 5,_fp.hash,48);
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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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_fp.address = Address(tmp).toInt();
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memcpy(_fp.hash,tmp + 5,48);
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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 _fp.address; }
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ZT_INLINE operator bool() const noexcept { return (_fp.address != 0); }
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ZT_INLINE bool operator==(const Fingerprint &h) const noexcept { return ((_fp.address == h._fp.address) && (memcmp(_fp.hash,h._fp.hash,ZT_IDENTITY_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 ((_fp.address < h._fp.address) || ((_fp.address == h._fp.address) && (memcmp(_fp.hash,h._fp.hash,ZT_IDENTITY_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 _fp;
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};
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} // namespace ZeroTier
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#endif
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