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Extract BLE and chat architecture policies (#1324)

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Co-authored-by: jack <jackjackbits@users.noreply.github.com>
This commit is contained in:
jack
2026-06-02 09:01:59 +02:00
committed by GitHub
co-authored by jack
parent 193cfdc06a
commit 3eb4f2bd72
46 changed files with 3286 additions and 786 deletions
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bitchat/Nostr/NostrProtocol.swift
+3 -18
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@@ -303,7 +303,7 @@ struct NostrProtocol {
combined.append(nonce24)
combined.append(sealed.ciphertext)
combined.append(sealed.tag)
return "v2:" + base64URLEncode(combined)
return "v2:" + Base64URLCoding.encode(combined)
}
private static func decrypt(
@@ -314,7 +314,7 @@ struct NostrProtocol {
// Expect NIP-44 v2 format
guard ciphertext.hasPrefix("v2:") else { throw NostrError.invalidCiphertext }
let encoded = String(ciphertext.dropFirst(3))
guard let data = base64URLDecode(encoded),
guard let data = Base64URLCoding.decode(encoded),
data.count > (24 + 16),
let senderPubkeyData = Data(hexString: senderPubkey) else {
throw NostrError.invalidCiphertext
@@ -580,24 +580,9 @@ enum NostrError: Error {
case encryptionFailed
}
// MARK: - NIP-44 v2 helpers (XChaCha20-Poly1305 + base64url)
// MARK: - NIP-44 v2 helpers (XChaCha20-Poly1305)
private extension NostrProtocol {
static func base64URLEncode(_ data: Data) -> String {
return data.base64EncodedString()
.replacingOccurrences(of: "+", with: "-")
.replacingOccurrences(of: "/", with: "_")
.replacingOccurrences(of: "=", with: "")
}
static func base64URLDecode(_ s: String) -> Data? {
var str = s
let pad = (4 - (str.count % 4)) % 4
if pad > 0 { str += String(repeating: "=", count: pad) }
str = str.replacingOccurrences(of: "-", with: "+").replacingOccurrences(of: "_", with: "/")
return Data(base64Encoded: str)
}
static func deriveNIP44V2Key(from sharedSecretData: Data) throws -> Data {
let derivedKey = HKDF<CryptoKit.SHA256>.deriveKey(
inputKeyMaterial: SymmetricKey(data: sharedSecretData),