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Include protocol version in key derivation.

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This commit is contained in:
akwizgran
2017-11-28 11:37:59 +00:00
parent 32e0b39771
commit 0084e51263
2 changed files with 17 additions and 9 deletions
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5
bramble-api/src/main/java/org/briarproject/bramble/api/contact/ContactExchangeTask.java
View File

@@ -12,6 +12,11 @@ import org.briarproject.bramble.api.plugin.duplex.DuplexTransportConnection;
@NotNullByDefault
public interface ContactExchangeTask {
/**
* The current version of the contact exchange protocol
*/
int PROTOCOL_VERSION = 0;
/**
* Label for deriving Alice's header key from the master secret.
*/

21
bramble-core/src/main/java/org/briarproject/bramble/contact/ContactExchangeTaskImpl.java
View File

@@ -142,8 +142,9 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
// Derive the header keys for the transport streams
SecretKey aliceHeaderKey = crypto.deriveKey(ALICE_KEY_LABEL,
masterSecret);
SecretKey bobHeaderKey = crypto.deriveKey(BOB_KEY_LABEL, masterSecret);
masterSecret, new byte[] {PROTOCOL_VERSION});
SecretKey bobHeaderKey = crypto.deriveKey(BOB_KEY_LABEL, masterSecret,
new byte[] {PROTOCOL_VERSION});
// Create the readers
InputStream streamReader =
@@ -157,8 +158,10 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
BdfWriter w = bdfWriterFactory.createWriter(streamWriter);
// Derive the nonces to be signed
byte[] aliceNonce = crypto.mac(ALICE_NONCE_LABEL, masterSecret);
byte[] bobNonce = crypto.mac(BOB_NONCE_LABEL, masterSecret);
byte[] aliceNonce = crypto.mac(ALICE_NONCE_LABEL, masterSecret,
new byte[] {PROTOCOL_VERSION});
byte[] bobNonce = crypto.mac(BOB_NONCE_LABEL, masterSecret,
new byte[] {PROTOCOL_VERSION});
// Exchange pseudonyms, signed nonces, and timestamps
long localTimestamp = clock.currentTimeMillis();
@@ -197,8 +200,8 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
try {
// Add the contact
ContactId contactId = addContact(remoteAuthor, masterSecret,
timestamp, alice, remoteProperties);
ContactId contactId = addContact(remoteAuthor, timestamp,
remoteProperties);
// Reuse the connection as a transport connection
connectionManager.manageOutgoingConnection(contactId, transportId,
conn);
@@ -295,15 +298,15 @@ class ContactExchangeTaskImpl extends Thread implements ContactExchangeTask {
return remote;
}
private ContactId addContact(Author remoteAuthor, SecretKey master,
long timestamp, boolean alice,
private ContactId addContact(Author remoteAuthor, long timestamp,
Map<TransportId, TransportProperties> remoteProperties)
throws DbException {
ContactId contactId;
Transaction txn = db.startTransaction(false);
try {
contactId = contactManager.addContact(txn, remoteAuthor,
localAuthor.getId(), master, timestamp, alice, true, true);
localAuthor.getId(), masterSecret, timestamp, alice,
true, true);
transportPropertyManager.addRemoteProperties(txn, contactId,
remoteProperties);
db.commitTransaction(txn);