mirror of
https://github.com/zerotier/ZeroTierOne.git
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248 lines
7.4 KiB
C++
248 lines
7.4 KiB
C++
/*
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* Copyright (c)2019 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: 2023-01-01
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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_CERTIFICATEOFOWNERSHIP_HPP
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#define ZT_CERTIFICATEOFOWNERSHIP_HPP
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "Constants.hpp"
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#include "Credential.hpp"
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#include "C25519.hpp"
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#include "Address.hpp"
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#include "Identity.hpp"
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#include "Buffer.hpp"
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#include "InetAddress.hpp"
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#include "MAC.hpp"
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// Max things per CertificateOfOwnership
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#define ZT_CERTIFICATEOFOWNERSHIP_MAX_THINGS 16
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// Maximum size of a thing's value field in bytes
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#define ZT_CERTIFICATEOFOWNERSHIP_MAX_THING_VALUE_SIZE 16
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namespace ZeroTier {
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class RuntimeEnvironment;
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/**
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* Certificate indicating ownership of a network identifier
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*/
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class CertificateOfOwnership : public Credential
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{
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friend class Credential;
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public:
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static inline Credential::Type credentialType() { return Credential::CREDENTIAL_TYPE_COO; }
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enum Thing
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{
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THING_NULL = 0,
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THING_MAC_ADDRESS = 1,
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THING_IPV4_ADDRESS = 2,
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THING_IPV6_ADDRESS = 3
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};
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inline CertificateOfOwnership()
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{
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memset(reinterpret_cast<void *>(this),0,sizeof(CertificateOfOwnership));
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}
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inline CertificateOfOwnership(const uint64_t nwid,const int64_t ts,const Address &issuedTo,const uint32_t id)
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{
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memset(reinterpret_cast<void *>(this),0,sizeof(CertificateOfOwnership));
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_networkId = nwid;
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_ts = ts;
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_id = id;
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_issuedTo = issuedTo;
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}
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inline uint64_t networkId() const { return _networkId; }
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inline int64_t timestamp() const { return _ts; }
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inline uint32_t id() const { return _id; }
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inline const Address &issuedTo() const { return _issuedTo; }
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inline const Address &signer() const { return _signedBy; }
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inline const uint8_t *signature() const { return _signature; }
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inline unsigned int signatureLength() const { return _signatureLength; }
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inline unsigned int thingCount() const { return (unsigned int)_thingCount; }
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inline Thing thingType(const unsigned int i) const { return (Thing)_thingTypes[i]; }
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inline const uint8_t *thingValue(const unsigned int i) const { return _thingValues[i]; }
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inline bool owns(const InetAddress &ip) const
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{
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if (ip.ss_family == AF_INET)
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return this->_owns(THING_IPV4_ADDRESS,&(reinterpret_cast<const struct sockaddr_in *>(&ip)->sin_addr.s_addr),4);
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if (ip.ss_family == AF_INET6)
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return this->_owns(THING_IPV6_ADDRESS,reinterpret_cast<const struct sockaddr_in6 *>(&ip)->sin6_addr.s6_addr,16);
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return false;
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}
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inline bool owns(const MAC &mac) const
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{
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uint8_t tmp[6];
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mac.copyTo(tmp,6);
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return this->_owns(THING_MAC_ADDRESS,tmp,6);
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}
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inline void addThing(const InetAddress &ip)
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{
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if (_thingCount >= ZT_CERTIFICATEOFOWNERSHIP_MAX_THINGS) return;
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if (ip.ss_family == AF_INET) {
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_thingTypes[_thingCount] = THING_IPV4_ADDRESS;
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memcpy(_thingValues[_thingCount],&(reinterpret_cast<const struct sockaddr_in *>(&ip)->sin_addr.s_addr),4);
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++_thingCount;
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} else if (ip.ss_family == AF_INET6) {
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_thingTypes[_thingCount] = THING_IPV6_ADDRESS;
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memcpy(_thingValues[_thingCount],reinterpret_cast<const struct sockaddr_in6 *>(&ip)->sin6_addr.s6_addr,16);
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++_thingCount;
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}
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}
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inline void addThing(const MAC &mac)
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{
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if (_thingCount >= ZT_CERTIFICATEOFOWNERSHIP_MAX_THINGS) return;
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_thingTypes[_thingCount] = THING_MAC_ADDRESS;
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mac.copyTo(_thingValues[_thingCount],6);
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++_thingCount;
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}
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/**
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* @param signer Signing identity, must have private key
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* @return True if signature was successful
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*/
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inline bool sign(const Identity &signer)
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{
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if (signer.hasPrivate()) {
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Buffer<sizeof(CertificateOfOwnership) + 64> tmp;
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_signedBy = signer.address();
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this->serialize(tmp,true);
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_signatureLength = signer.sign(tmp.data(),tmp.size(),_signature,sizeof(_signature));
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return true;
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}
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return false;
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}
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inline Credential::VerifyResult verify(const RuntimeEnvironment *RR,void *tPtr) const { return _verify(RR,tPtr,*this); }
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template<unsigned int C>
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inline void serialize(Buffer<C> &b,const bool forSign = false) const
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{
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if (forSign) b.append((uint64_t)0x7f7f7f7f7f7f7f7fULL);
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b.append(_networkId);
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b.append(_ts);
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b.append(_flags);
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b.append(_id);
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b.append((uint16_t)_thingCount);
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for(unsigned int i=0,j=_thingCount;i<j;++i) {
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b.append((uint8_t)_thingTypes[i]);
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b.append(_thingValues[i],ZT_CERTIFICATEOFOWNERSHIP_MAX_THING_VALUE_SIZE);
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}
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_issuedTo.appendTo(b);
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_signedBy.appendTo(b);
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if (!forSign) {
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b.append((uint8_t)1);
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b.append((uint16_t)_signatureLength); // length of signature
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b.append(_signature,_signatureLength);
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}
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b.append((uint16_t)0); // length of additional fields, currently 0
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if (forSign) b.append((uint64_t)0x7f7f7f7f7f7f7f7fULL);
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}
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template<unsigned int C>
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inline unsigned int deserialize(const Buffer<C> &b,unsigned int startAt = 0)
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{
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unsigned int p = startAt;
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*this = CertificateOfOwnership();
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_networkId = b.template at<uint64_t>(p); p += 8;
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_ts = b.template at<uint64_t>(p); p += 8;
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_flags = b.template at<uint64_t>(p); p += 8;
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_id = b.template at<uint32_t>(p); p += 4;
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_thingCount = b.template at<uint16_t>(p); p += 2;
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for(unsigned int i=0,j=_thingCount;i<j;++i) {
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if (i < ZT_CERTIFICATEOFOWNERSHIP_MAX_THINGS) {
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_thingTypes[i] = (uint8_t)b[p++];
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memcpy(_thingValues[i],b.field(p,ZT_CERTIFICATEOFOWNERSHIP_MAX_THING_VALUE_SIZE),ZT_CERTIFICATEOFOWNERSHIP_MAX_THING_VALUE_SIZE);
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p += ZT_CERTIFICATEOFOWNERSHIP_MAX_THING_VALUE_SIZE;
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}
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}
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_issuedTo.setTo(b.field(p,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); p += ZT_ADDRESS_LENGTH;
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_signedBy.setTo(b.field(p,ZT_ADDRESS_LENGTH),ZT_ADDRESS_LENGTH); p += ZT_ADDRESS_LENGTH;
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if (b[p++] == 1) {
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_signatureLength = b.template at<uint16_t>(p);
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if (_signatureLength > sizeof(_signature))
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throw ZT_EXCEPTION_INVALID_SERIALIZED_DATA_INVALID_CRYPTOGRAPHIC_TOKEN;
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p += 2;
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memcpy(_signature,b.field(p,_signatureLength),_signatureLength); p += _signatureLength;
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} else {
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p += 2 + b.template at<uint16_t>(p);
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}
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p += 2 + b.template at<uint16_t>(p);
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if (p > b.size())
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throw ZT_EXCEPTION_INVALID_SERIALIZED_DATA_OVERFLOW;
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return (p - startAt);
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}
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// Provides natural sort order by ID
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inline bool operator<(const CertificateOfOwnership &coo) const { return (_id < coo._id); }
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inline bool operator==(const CertificateOfOwnership &coo) const { return (memcmp(this,&coo,sizeof(CertificateOfOwnership)) == 0); }
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inline bool operator!=(const CertificateOfOwnership &coo) const { return (memcmp(this,&coo,sizeof(CertificateOfOwnership)) != 0); }
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private:
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inline bool _owns(const Thing &t,const void *v,unsigned int l) const
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{
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for(unsigned int i=0,j=_thingCount;i<j;++i) {
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if (_thingTypes[i] == (uint8_t)t) {
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unsigned int k = 0;
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while (k < l) {
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if (reinterpret_cast<const uint8_t *>(v)[k] != _thingValues[i][k])
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break;
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++k;
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}
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if (k == l)
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return true;
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}
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}
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return false;
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}
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uint64_t _networkId;
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int64_t _ts;
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uint64_t _flags;
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uint32_t _id;
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uint16_t _thingCount;
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uint8_t _thingTypes[ZT_CERTIFICATEOFOWNERSHIP_MAX_THINGS];
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uint8_t _thingValues[ZT_CERTIFICATEOFOWNERSHIP_MAX_THINGS][ZT_CERTIFICATEOFOWNERSHIP_MAX_THING_VALUE_SIZE];
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Address _issuedTo;
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Address _signedBy;
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unsigned int _signatureLength;
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uint8_t _signature[ZT_SIGNATURE_BUFFER_SIZE];
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};
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} // namespace ZeroTier
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#endif
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