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Code Issues Packages Projects Releases Wiki Activity

improve identity announcements (#198)

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* improve identity announcements

* touches

* signing noise id

* panic mode delete signing key
This commit is contained in:
callebtc
2025-07-31 06:26:41 +02:00
committed by GitHub
parent 34d00839b2
commit 4cb5932fd0
15 changed files with 302 additions and 113 deletions
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app/src/main/java/com/bitchat/android/mesh/MessageHandler.kt
+18 -3
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@@ -120,13 +120,27 @@ class MessageHandler(private val myPeerID: String) {
Log.d(TAG, "Parsed identity announcement: peerID=${announcement.peerID}, " +
"nickname=${announcement.nickname}, fingerprint=${announcement.fingerprint?.take(16)}...")
// Verify the announcement signature (basic validation)
// In a full implementation, this would use cryptographic verification
// Verify the announcement signature using Ed25519 (iOS compatibility)
if (announcement.signature.isEmpty()) {
Log.w(TAG, "Identity announcement from $peerID has no signature")
Log.w(TAG, "❌ Identity announcement from $peerID has no signature - rejecting")
return
}
// Verify signature using the same format as iOS
val timestampMs = announcement.timestamp.time
val bindingData = announcement.peerID.toByteArray(Charsets.UTF_8) +
announcement.publicKey +
timestampMs.toString().toByteArray(Charsets.UTF_8)
val isSignatureValid = delegate?.verifyEd25519Signature(announcement.signature, bindingData, announcement.signingPublicKey) ?: false
if (!isSignatureValid) {
Log.w(TAG, "❌ Signature verification failed for identity announcement from $peerID - rejecting")
return
}
Log.d(TAG, "✅ Signature verification successful for identity announcement from $peerID")
// Update peer binding in the delegate (ChatViewModel/BluetoothMeshService)
delegate?.updatePeerIDBinding(
newPeerID = announcement.peerID,
@@ -377,6 +391,7 @@ interface MessageHandlerDelegate {
fun verifySignature(packet: BitchatPacket, peerID: String): Boolean
fun encryptForPeer(data: ByteArray, recipientPeerID: String): ByteArray?
fun decryptFromPeer(encryptedData: ByteArray, senderPeerID: String): ByteArray?
fun verifyEd25519Signature(signature: ByteArray, data: ByteArray, publicKey: ByteArray): Boolean
// Noise protocol operations
fun hasNoiseSession(peerID: String): Boolean