Exemplo n.º 1
0
// If a FullFault message includes a signature from the Audit server
// which was nominated in the Fault, pledgedByAudit will return true
func (s *State) pledgedByAudit(fullFault *messages.FullServerFault) bool {
	for _, a := range s.Authorities {
		if a.AuthorityChainID.IsSameAs(fullFault.AuditServerID) {
			marshalledSF, err := fullFault.MarshalForSF()
			if err == nil {
				for _, sig := range fullFault.SignatureList.List {
					sigVer, err := a.VerifySignature(marshalledSF, sig.GetSignature())
					if err == nil && sigVer {
						return true
					}
				}
			}
			break
		}
	}
	return false
}
Exemplo n.º 2
0
// regularFullFaultExecution does the same thing as regularFaultExecution, except
// it will make sure to add every signature from the FullFault to the corresponding
// FaultState's VoteMap
func (s *State) regularFullFaultExecution(sf *messages.FullServerFault, pl *ProcessList) {
	coreHash := sf.GetCoreHash().Fixed()

	for _, signature := range sf.SignatureList.List {
		var issuerID [32]byte
		rawIssuerID := signature.GetKey()
		for i := 0; i < 32; i++ {
			if i < len(rawIssuerID) {
				issuerID[i] = rawIssuerID[i]
			}
		}

		faultState := pl.GetFaultState(coreHash)
		if !faultState.IsNil() {
			// We already have a map entry
		} else {
			// We don't have a map entry yet; let's create one
			fcore := ExtractFaultCore(sf)
			faultState = FaultState{FaultCore: fcore, AmINegotiator: false, MyVoteTallied: false, VoteMap: make(map[[32]byte]interfaces.IFullSignature)}

			if isMyNegotiation(fcore, pl) {
				faultState.AmINegotiator = true
				pl.AmINegotiator = true
			}

			if faultState.VoteMap == nil {
				faultState.VoteMap = make(map[[32]byte]interfaces.IFullSignature)
			}
			pl.AddFaultState(coreHash, faultState)
		}

		if s.Leader || s.IdentityChainID.IsSameAs(sf.AuditServerID) {
			if !faultState.MyVoteTallied {
				nsf := messages.NewServerFault(sf.ServerID, sf.AuditServerID, int(sf.VMIndex), sf.DBHeight, sf.Height, int(sf.SystemHeight), sf.Timestamp)
				sfbytes, err := nsf.MarshalForSignature()
				myAuth, _ := s.GetAuthority(s.IdentityChainID)
				if myAuth == nil || err != nil {
					return
				}
				valid, err := myAuth.VerifySignature(sfbytes, signature.GetSignature())
				if err == nil && valid {
					faultState.MyVoteTallied = true
					pl.AddFaultState(coreHash, faultState)
				}
			}
		}

		lbytes := sf.GetCoreHash().Bytes()

		isPledge := false
		auth, _ := s.GetAuthority(sf.AuditServerID)
		if auth == nil {
			isPledge = false
		} else {
			valid, err := auth.VerifySignature(lbytes, signature.GetSignature())
			if err == nil && valid {
				isPledge = true
				faultState.PledgeDone = true
				pl.AddFaultState(coreHash, faultState)
			}
		}

		sfSigned, err := s.FastVerifyAuthoritySignature(lbytes, signature, sf.DBHeight)

		if err == nil && (sfSigned > 0 || (sfSigned == 0 && isPledge)) {
			faultState.VoteMap[issuerID] = sf.GetSignature()
			pl.AddFaultState(coreHash, faultState)
		}
	}

	faultState := pl.GetFaultState(coreHash)
	if !faultState.IsNil() {
		if s.Leader || s.IdentityChainID.IsSameAs(sf.AuditServerID) {
			if !faultState.MyVoteTallied {
				now := time.Now().Unix()
				if int(now-s.LastTiebreak) > s.FaultTimeout/2 {
					if faultState.SigTally(s) >= len(pl.FedServers)-1 {
						s.LastTiebreak = now
					}

					nsf := messages.NewServerFault(sf.ServerID, sf.AuditServerID, int(sf.VMIndex), sf.DBHeight, sf.Height, int(sf.SystemHeight), sf.Timestamp)
					s.matchFault(nsf)
				}
			}
		}
	}
}