import com.subgraph.orchid.VoteAuthorityEntry; //导入依赖的package包/类
void addSignature(DirectorySignature signature) {
	final VoteAuthorityEntry voteAuthority = voteAuthorityEntries.get(signature.getIdentityDigest());
	if(voteAuthority == null) {
		logger.warning("Consensus contains signature for source not declared in authority section: "+ signature.getIdentityDigest());
		return;
	}
	final List<DirectorySignature> signatures = voteAuthority.getSignatures();
	final DigestAlgorithm newSignatureAlgorithm = signature.getSignature().getDigestAlgorithm();
	for(DirectorySignature sig: signatures) {
		DigestAlgorithm algo = sig.getSignature().getDigestAlgorithm();
		if(algo.equals(newSignatureAlgorithm)) {
			logger.warning("Consensus contains two or more signatures for same source with same algorithm");
			return;
		}
	}
	signatureCount += 1;
	signatures.add(signature);
}
 

import com.subgraph.orchid.VoteAuthorityEntry; //导入依赖的package包/类
ConsensusDocumentImpl() {
	clientVersions = new HashSet<String>();
	serverVersions = new HashSet<String>();
	knownFlags = new HashSet<String>();
	voteAuthorityEntries = new HashMap<HexDigest, VoteAuthorityEntry>();
	routerStatusEntries = new ArrayList<RouterStatus>();
	bandwidthWeights = new HashMap<String, Integer>();
	parameters = new HashMap<String, Integer>();
}
 

import com.subgraph.orchid.VoteAuthorityEntry; //导入依赖的package包/类
public synchronized SignatureStatus verifySignatures() {
	boolean firstCall = isFirstCallToVerifySignatures;
	isFirstCallToVerifySignatures = false;
	requiredCertificates.clear();
	int verifiedCount = 0;
	int certsNeededCount = 0;
	final int v3Count = TrustedAuthorities.getInstance().getV3AuthorityServerCount();
	final int required = (v3Count / 2) + 1;
	
	for(VoteAuthorityEntry entry: voteAuthorityEntries.values()) {
		switch(verifySingleAuthority(entry)) {
		case STATUS_FAILED:
			break;
		case STATUS_NEED_CERTS:
			certsNeededCount += 1;
			break;
		case STATUS_VERIFIED:
			verifiedCount += 1;
			break;
		}
	}
	
	if(verifiedCount >= required) {
		return SignatureStatus.STATUS_VERIFIED;
	} else if(verifiedCount + certsNeededCount >= required) {
		if(firstCall) {
			logger.info("Certificates need to be retrieved to verify consensus");
		}
		return SignatureStatus.STATUS_NEED_CERTS;
	} else {
		return SignatureStatus.STATUS_FAILED;
	}
}
 

import com.subgraph.orchid.VoteAuthorityEntry; //导入依赖的package包/类
private SignatureStatus verifySingleAuthority(VoteAuthorityEntry authority) {
	
	boolean certsNeeded = false;
	boolean validSignature = false;
	
	for(DirectorySignature s: authority.getSignatures()) {
		DirectoryServer trusted = TrustedAuthorities.getInstance().getAuthorityServerByIdentity(s.getIdentityDigest());
		if(trusted == null) {
			logger.warning("Consensus signed by unrecognized directory authority: "+ s.getIdentityDigest());
			return SignatureStatus.STATUS_FAILED;
		} else {
			switch(verifySignatureForTrustedAuthority(trusted, s)) {
			case STATUS_NEED_CERTS:
				certsNeeded = true;
				break;
			case STATUS_VERIFIED:
				validSignature = true;
				break;
			default:
				break;
			}
		}
	}
	
	if(validSignature) {
		return SignatureStatus.STATUS_VERIFIED;
	} else if(certsNeeded) {
		return SignatureStatus.STATUS_NEED_CERTS;
	} else {
		return SignatureStatus.STATUS_FAILED;
	}
}
 

import com.subgraph.orchid.VoteAuthorityEntry; //导入依赖的package包/类
void addVoteAuthorityEntry(VoteAuthorityEntry entry) {
	voteAuthorityEntries.put(entry.getIdentity(), entry);
}