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Implement indefinite store-and-forward for favorite peers

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- Change message cache timeout from 5 minutes to 12 hours for regular peers
- Add indefinite message storage for favorite peers with 1000 message limit
- Cache relayed messages for offline favorites
- Automatically send cached messages when favorites come online
- Use public key fingerprints to identify favorites persistently
- Add isFavorite delegate method to check favorites by fingerprint
This commit is contained in:
jack
2025-07-04 01:51:37 +02:00
parent fe986ed397
commit c7baf31f03
4 changed files with 205 additions and 35 deletions
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bitchat/Services/EncryptionService.swift
+18 -31
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@@ -51,43 +51,30 @@ class EncryptionService {
// Add peer's combined public keys
func addPeerPublicKey(_ peerID: String, publicKeyData: Data) throws {
print("[CRYPTO] Received public key data of size: \(publicKeyData.count)")
// Convert to array for safe access
let keyBytes = [UInt8](publicKeyData)
if keyBytes.count == 96 {
// New format: 32 for key agreement + 32 for signing + 32 for identity
let keyAgreementData = Data(keyBytes[0..<32])
let signingKeyData = Data(keyBytes[32..<64])
let identityKeyData = Data(keyBytes[64..<96])
let publicKey = try Curve25519.KeyAgreement.PublicKey(rawRepresentation: keyAgreementData)
peerPublicKeys[peerID] = publicKey
let signingKey = try Curve25519.Signing.PublicKey(rawRepresentation: signingKeyData)
peerSigningKeys[peerID] = signingKey
let identityKey = try Curve25519.Signing.PublicKey(rawRepresentation: identityKeyData)
peerIdentityKeys[peerID] = identityKey
print("[CRYPTO] Stored all three keys for peer \(peerID)")
} else if keyBytes.count == 64 {
// Handle old format (64 bytes) for backward compatibility
print("[CRYPTO] Received old key format (64 bytes), no identity key")
let keyAgreementData = Data(keyBytes[0..<32])
let signingKeyData = Data(keyBytes[32..<64])
let publicKey = try Curve25519.KeyAgreement.PublicKey(rawRepresentation: keyAgreementData)
peerPublicKeys[peerID] = publicKey
let signingKey = try Curve25519.Signing.PublicKey(rawRepresentation: signingKeyData)
peerSigningKeys[peerID] = signingKey
} else {
print("[CRYPTO] Invalid public key data size: \(keyBytes.count)")
guard keyBytes.count == 96 else {
print("[CRYPTO] Invalid public key data size: \(keyBytes.count), expected 96")
throw EncryptionError.invalidPublicKey
}
// Extract all three keys: 32 for key agreement + 32 for signing + 32 for identity
let keyAgreementData = Data(keyBytes[0..<32])
let signingKeyData = Data(keyBytes[32..<64])
let identityKeyData = Data(keyBytes[64..<96])
let publicKey = try Curve25519.KeyAgreement.PublicKey(rawRepresentation: keyAgreementData)
peerPublicKeys[peerID] = publicKey
let signingKey = try Curve25519.Signing.PublicKey(rawRepresentation: signingKeyData)
peerSigningKeys[peerID] = signingKey
let identityKey = try Curve25519.Signing.PublicKey(rawRepresentation: identityKeyData)
peerIdentityKeys[peerID] = identityKey
print("[CRYPTO] Stored all three keys for peer \(peerID)")
// Generate shared secret for encryption
if let publicKey = peerPublicKeys[peerID] {
let sharedSecret = try privateKey.sharedSecretFromKeyAgreement(with: publicKey)