mirror of
https://github.com/permissionlesstech/bitchat.git
synced 2026-07-25 02:25:20 +00:00
Relabel private Nostr envelopes honestly
This commit is contained in:
jack
@@ -2,18 +2,17 @@
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// NostrProtocolTests.swift
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// bitchatTests
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//
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// Tests for NIP-17 gift-wrapped private messages
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// Tests for BitChat's proprietary private-envelope transport over Nostr.
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//
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import Testing
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import CryptoKit
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import Foundation
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import BitFoundation
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@testable import bitchat
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struct NostrProtocolTests {
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@Test func nip17MessageRoundTrip() throws {
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@Test func privateEnvelopeRoundTrip() throws {
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// Create sender and recipient identities
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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@@ -22,21 +21,19 @@ struct NostrProtocolTests {
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print("Recipient pubkey: \(recipient.publicKeyHex)")
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// Create a test message
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let originalContent = "Hello from NIP-17 test!"
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let originalContent = "Hello from BitChat private-envelope test!"
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// Create encrypted gift wrap
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let giftWrap = try NostrProtocol.createPrivateMessage(
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let envelope = try NostrProtocol.createPrivateEnvelope(
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content: originalContent,
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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print("Gift wrap created with ID: \(giftWrap.id)")
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print("Gift wrap pubkey: \(giftWrap.pubkey)")
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print("Private envelope created with ID: \(envelope.id)")
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print("Private envelope pubkey: \(envelope.pubkey)")
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// Decrypt the gift wrap
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let (decryptedContent, senderPubkey, timestamp) = try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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let (decryptedContent, senderPubkey, timestamp) = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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@@ -52,43 +49,265 @@ struct NostrProtocolTests {
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print("✅ Successfully decrypted message: '\(decryptedContent)' from \(senderPubkey) at \(messageDate)")
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}
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@Test func giftWrapUsesUniqueEphemeralKeys() throws {
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@Test func privateEnvelopesUseUniqueEphemeralKeys() throws {
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// Create identities
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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// Create two messages
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let message1 = try NostrProtocol.createPrivateMessage(
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let message1 = try NostrProtocol.createPrivateEnvelope(
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content: "Message 1",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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let message2 = try NostrProtocol.createPrivateMessage(
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let message2 = try NostrProtocol.createPrivateEnvelope(
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content: "Message 2",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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// Gift wrap pubkeys should be different (unique ephemeral keys)
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// Public envelope keys must be one-time use.
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#expect(message1.pubkey != message2.pubkey)
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print("Message 1 gift wrap pubkey: \(message1.pubkey)")
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print("Message 2 gift wrap pubkey: \(message2.pubkey)")
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print("Message 1 envelope pubkey: \(message1.pubkey)")
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print("Message 2 envelope pubkey: \(message2.pubkey)")
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// Both should decrypt successfully
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let (content1, _, _) = try NostrProtocol.decryptPrivateMessage(
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giftWrap: message1,
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let (content1, _, _) = try NostrProtocol.decryptPrivateEnvelope(
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envelope: message1,
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recipientIdentity: recipient
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)
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let (content2, _, _) = try NostrProtocol.decryptPrivateMessage(
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giftWrap: message2,
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let (content2, _, _) = try NostrProtocol.decryptPrivateEnvelope(
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envelope: message2,
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recipientIdentity: recipient
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)
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#expect(content1 == "Message 1")
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#expect(content2 == "Message 2")
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}
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@Test func privateEnvelopeUsesBitChatWireFormatAtEveryLayer() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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let envelope = try NostrProtocol.createPrivateEnvelope(
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content: "bitchat-specific",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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#expect(envelope.kind == NostrProtocol.EventKind.privateEnvelope.rawValue)
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#expect(envelope.kind != NostrProtocol.EventKind.legacyNIP59GiftWrap.rawValue)
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#expect(envelope.content.hasPrefix(NostrProtocol.privateEnvelopeContentPrefix))
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#expect(!envelope.content.hasPrefix("v2:"))
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#expect(envelope.tags == [["p", recipient.publicKeyHex]])
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#expect(envelope.created_at <= Int(Date().timeIntervalSince1970))
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let layers = try NostrProtocol.decodePrivateEnvelopeLayersForTesting(
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envelope: envelope,
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recipientIdentity: recipient
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)
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#expect(layers.seal.kind == NostrProtocol.EventKind.privateSeal.rawValue)
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#expect(layers.seal.content.hasPrefix(NostrProtocol.privateEnvelopeContentPrefix))
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#expect(layers.seal.tags.isEmpty)
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#expect(layers.message.kind == NostrProtocol.EventKind.privateMessage.rawValue)
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#expect(layers.message.tags.isEmpty)
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#expect(layers.message.sig == nil)
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}
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@Test func decryptAcceptsReceiveOnlyLegacyBitChatEnvelope() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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let envelope = try NostrProtocol.createLegacyPrivateEnvelopeForTesting(
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content: "legacy in-flight message",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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#expect(envelope.kind == NostrProtocol.EventKind.legacyNIP59GiftWrap.rawValue)
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#expect(envelope.content.hasPrefix("v2:"))
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let result = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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#expect(result.content == "legacy in-flight message")
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#expect(result.senderPubkey == sender.publicKeyHex)
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let layers = try NostrProtocol.decodePrivateEnvelopeLayersForTesting(
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envelope: envelope,
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recipientIdentity: recipient
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)
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#expect(layers.seal.kind == NostrProtocol.EventKind.legacyNIP59Seal.rawValue)
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#expect(layers.message.kind == NostrProtocol.EventKind.legacyNIP17DirectMessage.rawValue)
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}
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@Test func decryptsFrozenLegacyEnvelopeProducedByRelease733098bb() throws {
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let eventData = try Data(contentsOf: fixtureURL(
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name: "LegacyPrivateEnvelope733098bb"
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))
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let keyData = try Data(contentsOf: fixtureURL(
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name: "LegacyPrivateEnvelope733098bbRecipientKey"
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))
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let envelope = try JSONDecoder().decode(NostrEvent.self, from: eventData)
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let keyFixture = try JSONDecoder().decode(LegacyRecipientKeyFixture.self, from: keyData)
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let recipientKey = try #require(Data(hexString: keyFixture.recipientPrivateKey))
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let recipient = try NostrIdentity(privateKeyData: recipientKey)
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#expect(envelope.isValidSignature())
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let result = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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#expect(result.content == "legacy fixture from 733098bb")
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#expect(result.senderPubkey == "2e3d79df7047204f02b726c574e256f8de1dd80510f7dcb8b0d12df13acb87e6")
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}
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@Test func publicationBatchDualPublishesOnlyBeforeExplicitDeadline() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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let beforeDeadline = NostrProtocol.legacyPrivateEnvelopePublicationDeadline
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.addingTimeInterval(-1)
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let migrationBatch = try NostrProtocol.createPrivateEnvelopePublicationBatch(
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content: "mixed-version",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender,
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now: beforeDeadline
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)
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#expect(migrationBatch.map(\.kind) == [
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NostrProtocol.EventKind.privateEnvelope.rawValue,
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NostrProtocol.EventKind.legacyNIP59GiftWrap.rawValue
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])
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for envelope in migrationBatch {
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let result = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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#expect(result.content == "mixed-version")
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}
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let postMigrationBatch = try NostrProtocol.createPrivateEnvelopePublicationBatch(
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content: "new-only",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender,
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now: NostrProtocol.legacyPrivateEnvelopePublicationDeadline
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)
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#expect(postMigrationBatch.map(\.kind) == [
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NostrProtocol.EventKind.privateEnvelope.rawValue
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])
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}
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@Test func mailboxLookbackCoversFullRetentionWindowAndTimestampFuzz() {
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let sentAt = Date(timeIntervalSince1970: 1_800_000_000)
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let earliestPublicTimestamp = sentAt.addingTimeInterval(
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-TransportConfig.nostrPrivateEnvelopeTimestampFuzzSeconds
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)
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let reconnectAtRetentionBoundary = sentAt.addingTimeInterval(24 * 60 * 60)
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let filterSince = reconnectAtRetentionBoundary.addingTimeInterval(
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-TransportConfig.nostrDMSubscribeLookbackSeconds
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)
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#expect(TransportConfig.nostrDMSubscribeLookbackSeconds == (24 * 60 * 60) + (15 * 60))
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#expect(filterSince <= earliestPublicTimestamp)
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}
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@Test func largePrivateEnvelopeFitsLayerSpecificExpansionLimits() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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// Large enough that the nested Base64 seal exceeds the inner 32 KiB
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// cap, while the inner message JSON itself remains below that cap.
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let content = String(repeating: "A", count: 30 * 1024)
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let envelope = try NostrProtocol.createPrivateEnvelope(
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content: content,
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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let decrypted = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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#expect(decrypted.content == content)
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#expect(envelope.content.utf8.count <= NostrProtocol.maximumPrivateEnvelopeCiphertextBytes)
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}
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@Test func privateEnvelopeRejectsOversizedCiphertextBeforeDecoding() throws {
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let recipient = try NostrIdentity.generate()
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let wrapper = try NostrIdentity.generate()
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let oversizedContent = NostrProtocol.privateEnvelopeContentPrefix
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+ String(
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repeating: "A",
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count: NostrProtocol.maximumPrivateEnvelopeCiphertextBytes
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)
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let event = NostrEvent(
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pubkey: wrapper.publicKeyHex,
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createdAt: Date(),
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kind: .privateEnvelope,
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tags: [["p", recipient.publicKeyHex]],
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content: oversizedContent
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)
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let signed = try event.sign(with: wrapper.schnorrSigningKey())
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expectInvalidCiphertext {
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_ = try NostrProtocol.decryptPrivateEnvelope(
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envelope: signed,
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recipientIdentity: recipient
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)
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}
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}
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@Test func privateEnvelopeRejectsOversizedPlaintextBeforeEncryption() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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let oversizedPlaintext = String(
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repeating: "x",
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count: NostrProtocol.maximumPrivateEnvelopePlaintextBytes + 1
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)
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expectInvalidCiphertext {
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_ = try NostrProtocol.createPrivateEnvelope(
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content: oversizedPlaintext,
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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}
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}
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@Test func privateEnvelopeRejectsOversizedNestedJSONBeforeParsing() {
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let oversizedJSON = String(
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repeating: "{",
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count: NostrProtocol.maximumPrivateEnvelopePlaintextBytes + 1
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)
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expectInvalidCiphertext {
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_ = try NostrProtocol.decodePrivateEnvelopeEventJSONForTesting(oversizedJSON)
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}
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}
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@Test func decryptDoesNotMisinterpretStandardNIP44PayloadAsLegacyBitChat() throws {
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let recipient = try NostrIdentity.generate()
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let wrapper = try NostrIdentity.generate()
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// A valid NIP-44 v2 payload from the official test vectors. Its wire
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// format starts with a version byte in standard Base64, not BitChat's
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// historical `v2:` prefix.
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let standardPayload = "AgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABee0G5VSK0/9YypIObAtDKfYEAjD35uVkHyB0F4DwrcNaCXlCWZKaArsGrY6M9wnuTMxWfp1RTN9Xga8no+kF5Vsb"
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let event = NostrEvent(
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pubkey: wrapper.publicKeyHex,
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createdAt: Date(),
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kind: .legacyNIP59GiftWrap,
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tags: [["p", recipient.publicKeyHex]],
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content: standardPayload
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)
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let signed = try event.sign(with: wrapper.schnorrSigningKey())
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expectInvalidCiphertext {
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_ = try NostrProtocol.decryptPrivateEnvelope(
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envelope: signed,
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recipientIdentity: recipient
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)
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}
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}
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@Test func decryptionFailsWithWrongRecipient() throws {
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let sender = try NostrIdentity.generate()
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@@ -96,68 +315,58 @@ struct NostrProtocolTests {
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let wrongRecipient = try NostrIdentity.generate()
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// Create message for recipient
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let giftWrap = try NostrProtocol.createPrivateMessage(
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let envelope = try NostrProtocol.createPrivateEnvelope(
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content: "Secret message",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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// Try to decrypt with wrong recipient
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if #available(macOS 14.4, iOS 17.4, *) {
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#expect(throws: CryptoKitError.authenticationFailure) {
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try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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recipientIdentity: wrongRecipient
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)
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}
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} else {
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#expect(throws: (any Error).self) {
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try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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recipientIdentity: wrongRecipient
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)
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}
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expectInvalidEvent {
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_ = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: wrongRecipient
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)
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}
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}
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@Test func decryptRejectsInvalidSealSignature() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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let giftWrap = try NostrProtocol.createPrivateMessageWithInvalidSealSignatureForTesting(
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let envelope = try NostrProtocol.createPrivateEnvelopeWithInvalidSealSignatureForTesting(
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content: "forged signature",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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expectInvalidEvent {
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_ = try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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_ = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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}
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}
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@Test func decryptRejectsSealRumorPubkeyMismatch() throws {
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@Test func decryptRejectsSealMessagePubkeyMismatch() throws {
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let claimedSender = try NostrIdentity.generate()
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let sealSigner = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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let giftWrap = try NostrProtocol.createPrivateMessageWithMismatchedSealRumorPubkeyForTesting(
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let envelope = try NostrProtocol.createPrivateEnvelopeWithMismatchedSealMessagePubkeyForTesting(
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content: "spoofed sender",
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recipientPubkey: recipient.publicKeyHex,
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rumorIdentity: claimedSender,
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messageIdentity: claimedSender,
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sealSignerIdentity: sealSigner
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)
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expectInvalidEvent {
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_ = try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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_ = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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}
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}
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@Test
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func testAckRoundTripNIP44V2_Delivered() throws {
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func deliveredAckRoundTripsInsidePrivateEnvelope() throws {
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// Identities
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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@@ -171,19 +380,17 @@ struct NostrProtocolTests {
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"Failed to embed delivered ack"
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)
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// Create NIP-17 gift wrap to recipient (uses NIP-44 v2 internally)
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let giftWrap = try NostrProtocol.createPrivateMessage(
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let envelope = try NostrProtocol.createPrivateEnvelope(
|
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content: embedded,
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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// Ensure v2 format was used for ciphertext
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#expect(giftWrap.content.hasPrefix("v2:"))
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#expect(envelope.content.hasPrefix(NostrProtocol.privateEnvelopeContentPrefix))
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// Decrypt as recipient
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let (content, senderPubkey, _) = try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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let (content, senderPubkey, _) = try NostrProtocol.decryptPrivateEnvelope(
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envelope: envelope,
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recipientIdentity: recipient
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)
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@@ -208,7 +415,7 @@ struct NostrProtocolTests {
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}
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}
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@Test func ackRoundTripNIP44V2_ReadReceipt() throws {
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@Test func readReceiptRoundTripsInsidePrivateEnvelope() throws {
|
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// Identities
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let sender = try NostrIdentity.generate()
|
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let recipient = try NostrIdentity.generate()
|
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@@ -220,16 +427,16 @@ struct NostrProtocolTests {
|
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"Failed to embed read ack"
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)
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|
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let giftWrap = try NostrProtocol.createPrivateMessage(
|
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let envelope = try NostrProtocol.createPrivateEnvelope(
|
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content: embedded,
|
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recipientPubkey: recipient.publicKeyHex,
|
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senderIdentity: sender
|
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)
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#expect(giftWrap.content.hasPrefix("v2:"))
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#expect(envelope.content.hasPrefix(NostrProtocol.privateEnvelopeContentPrefix))
|
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|
||||
let (content, senderPubkey, _) = try NostrProtocol.decryptPrivateMessage(
|
||||
giftWrap: giftWrap,
|
||||
let (content, senderPubkey, _) = try NostrProtocol.decryptPrivateEnvelope(
|
||||
envelope: envelope,
|
||||
recipientIdentity: recipient
|
||||
)
|
||||
#expect(senderPubkey == sender.publicKeyHex)
|
||||
@@ -290,7 +497,42 @@ struct NostrProtocolTests {
|
||||
#expect(object["limit"] as? Int == 42)
|
||||
}
|
||||
|
||||
@Test func privateEnvelopeFilterIncludesPrimaryAndCompatibilityKinds() throws {
|
||||
let since = Date(timeIntervalSince1970: 1_234_567)
|
||||
let filter = NostrFilter.privateEnvelopesFor(pubkey: "recipient", since: since)
|
||||
let data = try JSONEncoder().encode(filter)
|
||||
let object = try #require(try JSONSerialization.jsonObject(with: data) as? [String: Any])
|
||||
|
||||
#expect(object["kinds"] as? [Int] == [
|
||||
NostrProtocol.EventKind.privateEnvelope.rawValue,
|
||||
NostrProtocol.EventKind.legacyNIP59GiftWrap.rawValue
|
||||
])
|
||||
#expect(object["#p"] as? [String] == ["recipient"])
|
||||
#expect(object["since"] as? Int == 1_234_567)
|
||||
#expect(object["limit"] as? Int ==
|
||||
TransportConfig.nostrRelayDefaultFetchLimit
|
||||
* NostrProtocol.acceptedPrivateEnvelopeKinds.count
|
||||
)
|
||||
}
|
||||
|
||||
// MARK: - Helpers
|
||||
private struct LegacyRecipientKeyFixture: Decodable {
|
||||
let recipientPrivateKey: String
|
||||
|
||||
enum CodingKeys: String, CodingKey {
|
||||
case recipientPrivateKey = "recipient_private_key"
|
||||
}
|
||||
}
|
||||
|
||||
private func fixtureURL(name: String) throws -> URL {
|
||||
#if SWIFT_PACKAGE
|
||||
let bundle = Bundle.module
|
||||
#else
|
||||
let bundle = Bundle(for: MockKeychain.self)
|
||||
#endif
|
||||
return try #require(bundle.url(forResource: name, withExtension: "json"))
|
||||
}
|
||||
|
||||
private static func base64URLDecode(_ s: String) -> Data? {
|
||||
var str = s.replacingOccurrences(of: "-", with: "+").replacingOccurrences(of: "_", with: "/")
|
||||
let rem = str.count % 4
|
||||
@@ -308,4 +550,15 @@ struct NostrProtocolTests {
|
||||
Issue.record("Expected NostrError.invalidEvent, got \(error)")
|
||||
}
|
||||
}
|
||||
|
||||
private func expectInvalidCiphertext(_ operation: () throws -> Void) {
|
||||
do {
|
||||
try operation()
|
||||
Issue.record("Expected NostrError.invalidCiphertext")
|
||||
} catch NostrError.invalidCiphertext {
|
||||
return
|
||||
} catch {
|
||||
Issue.record("Expected NostrError.invalidCiphertext, got \(error)")
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user