mirror of
https://github.com/permissionlesstech/bitchat.git
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jackandGitHub
e9275cb3d8
Split-out safe half of #1437 (the kind-1402 wire migration stays held for Android coordination). Docs (README/WHITEPAPER/PRIVACY_POLICY/privacy-assessment) now describe the actual proprietary DM construction — kind 1059 gift wrap carrying XChaCha20-Poly1305 with a 24-byte nonce, base64url v2: framing, and an HKDF that borrows the nip44-v2 info label but is not the NIP-44 key schedule — instead of claiming NIP-17/44/59. Hardens the existing legacy inbound path: 64 KiB ciphertext cap before decode (~46x the largest producible legacy envelope), outer kind/recipient-tag/signature binding, tagless kind-13 seal binding, unsigned kind-14 inner binding, inner tags restricted to the two shapes deployed clients emit (verified against every historical iOS release and a fixture frozen from Android production), SecRandomCopyBytes failure now throws, non-UTF-8 plaintext now throws instead of returning empty. Adds frozen cross-platform fixtures with hash-pinned generators; interop-reviewed with no rejection surface for deployed clients.
600 lines
23 KiB
Swift
600 lines
23 KiB
Swift
//
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// NostrProtocolTests.swift
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// bitchatTests
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//
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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 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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// 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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print("Sender pubkey: \(sender.publicKeyHex)")
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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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// Create encrypted gift wrap
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let giftWrap = try NostrProtocol.createPrivateMessage(
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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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// 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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recipientIdentity: recipient
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)
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// Verify
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#expect(decryptedContent == originalContent)
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#expect(senderPubkey == sender.publicKeyHex)
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// Verify timestamp is reasonable (within last minute)
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let messageDate = Date(timeIntervalSince1970: TimeInterval(timestamp))
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let timeDiff = abs(messageDate.timeIntervalSinceNow)
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#expect(timeDiff < 60, "Message timestamp should be recent")
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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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// 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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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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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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#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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// Both should decrypt successfully
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let (content1, _, _) = try NostrProtocol.decryptPrivateMessage(
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giftWrap: 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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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 decryptionFailsWithWrongRecipient() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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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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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. The outer envelope is bound to
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// the addressed recipient's `p` tag, so this now fails validation
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// before any decryption is attempted.
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expectInvalidEvent {
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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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}
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@Test func decryptAcceptsCurrentAndroidInnerRecipientTag() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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// Current Android's `createPrivateMessage` emits an unsigned kind-14
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// inner event with exactly [["p", recipient]], while released iOS
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// uses no inner tags. This isolated generator reproduces the Android
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// wire shape without making the production encoder depend on it.
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let giftWrap = try NostrProtocol.createPrivateMessageWithInnerTagsForTesting(
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content: "legacy message from Android",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender,
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innerMessageTags: [["p", recipient.publicKeyHex]]
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)
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let result = try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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recipientIdentity: recipient
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)
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#expect(result.content == "legacy message from Android")
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#expect(result.senderPubkey == sender.publicKeyHex)
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}
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@Test func decryptRejectsAlternateInnerTagShapes() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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let otherRecipient = try NostrIdentity.generate()
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let invalidTagShapes = [
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[["p", otherRecipient.publicKeyHex]],
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[["p", recipient.publicKeyHex], ["p", recipient.publicKeyHex]],
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[["p", recipient.publicKeyHex, "unexpected"]],
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[["x", recipient.publicKeyHex]]
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]
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for tags in invalidTagShapes {
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let giftWrap = try NostrProtocol.createPrivateMessageWithInnerTagsForTesting(
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content: "invalid inner tag shape",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender,
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innerMessageTags: tags
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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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recipientIdentity: recipient
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)
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}
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}
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}
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@Test func decryptsFrozenLegacyEnvelopeProducedByAndroidB7f0b33d() throws {
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let eventData = try Data(contentsOf: fixtureURL(
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name: "AndroidLegacyPrivateEnvelopeB7f0b33d"
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))
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let metadataData = try Data(contentsOf: fixtureURL(
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name: "AndroidLegacyPrivateEnvelopeB7f0b33dMetadata"
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))
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let envelope = try JSONDecoder().decode(NostrEvent.self, from: eventData)
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let metadata = try JSONDecoder().decode(AndroidLegacyEnvelopeFixture.self, from: metadataData)
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let recipientKey = try #require(Data(hexString: metadata.recipientPrivateKey))
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let recipient = try NostrIdentity(privateKeyData: recipientKey)
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#expect(metadata.androidCommit == "b7f0b33d3a267c770d3d5a65ee2d8c7e755450db")
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#expect(metadata.generator == "NostrProtocol.createPrivateMessage")
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// The generator patch ships as .patch.txt so the Xcode synchronized
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// test group reliably copies it as a text resource; its pinned SHA-256
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// covers the unchanged patch content.
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#expect(metadata.generatorPatch == "AndroidLegacyPrivateEnvelopeB7f0b33dGenerator.patch.txt")
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#expect(metadata.fixtureSHA256 == eventData.sha256Fingerprint())
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#expect(metadata.gradleTest.contains("NostrProtocolTest.emitCrossPlatformFixtures"))
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let generatorPatch = try String(contentsOf: fixtureURL(
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name: "AndroidLegacyPrivateEnvelopeB7f0b33dGenerator.patch",
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extension: "txt"
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))
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#expect(metadata.generatorPatchSHA256 == Data(generatorPatch.utf8).sha256Fingerprint())
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#expect(generatorPatch.contains("fun emitCrossPlatformFixtures()"))
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#expect(generatorPatch.contains(metadata.recipientPrivateKey))
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#expect(envelope.isValidSignature())
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#expect(envelope.kind == NostrProtocol.EventKind.giftWrap.rawValue)
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#expect(envelope.tags == [["p", recipient.publicKeyHex]])
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// The Android inner event carries exactly the recipient `p` tag, so a
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// successful decrypt also proves the Android inner-tag acceptance.
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let result = try NostrProtocol.decryptPrivateMessage(
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giftWrap: envelope,
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recipientIdentity: recipient
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)
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#expect(result.content == "legacy fixture from Android b7f0b33d")
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#expect(result.senderPubkey == metadata.senderPublicKey)
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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.decryptPrivateMessage(
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giftWrap: 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 decryptRejectsOversizedCiphertextBeforeDecoding() 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 = "v2:"
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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: .giftWrap,
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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.decryptPrivateMessage(
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giftWrap: 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 decryptDoesNotMisinterpretStandardNIP44Payload() 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: .giftWrap,
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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.decryptPrivateMessage(
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giftWrap: 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 decryptRejectsWrongOuterKind() throws {
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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var giftWrap = try NostrProtocol.createPrivateMessage(
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content: "wrong outer kind",
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recipientPubkey: recipient.publicKeyHex,
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senderIdentity: sender
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)
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giftWrap = NostrEvent(
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pubkey: giftWrap.pubkey,
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createdAt: Date(timeIntervalSince1970: TimeInterval(giftWrap.created_at)),
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kind: .textNote,
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tags: giftWrap.tags,
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content: giftWrap.content
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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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recipientIdentity: recipient
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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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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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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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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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content: "spoofed sender",
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recipientPubkey: recipient.publicKeyHex,
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rumorIdentity: 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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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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// Identities
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let sender = try NostrIdentity.generate()
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let recipient = try NostrIdentity.generate()
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// Build a DELIVERED ack embedded payload (geohash-style, no recipient peer ID)
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let messageID = "TEST-MSG-DELIVERED-1"
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let senderPeerID = PeerID(str: "0123456789abcdef") // 8-byte hex peer ID
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let embedded = try #require(
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NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .delivered, messageID: messageID, senderPeerID: senderPeerID),
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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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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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// Decrypt as recipient
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let (content, senderPubkey, _) = try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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recipientIdentity: recipient
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)
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// Verify sender is correct
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#expect(senderPubkey == sender.publicKeyHex)
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// Parse BitChat payload
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#expect(content.hasPrefix("bitchat1:"))
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let base64url = String(content.dropFirst("bitchat1:".count))
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let packetData = try #require(Self.base64URLDecode(base64url))
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let packet = try #require(BitchatPacket.from(packetData), "Failed to decode bitchat packet")
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#expect(packet.type == MessageType.noiseEncrypted.rawValue)
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let payload = try #require(NoisePayload.decode(packet.payload), "Failed to decode NoisePayload")
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switch payload.type {
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case .delivered:
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let mid = String(data: payload.data, encoding: .utf8)
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#expect(mid == messageID)
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default:
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Issue.record("Unexpected payload type: \(payload.type)")
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}
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}
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@Test func ackRoundTripNIP44V2_ReadReceipt() 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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let messageID = "TEST-MSG-READ-1"
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let senderPeerID = PeerID(str: "fedcba9876543210") // 8-byte hex peer ID
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let embedded = try #require(
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NostrEmbeddedBitChat.encodeAckForNostrNoRecipient(type: .readReceipt, messageID: messageID, senderPeerID: senderPeerID),
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"Failed to embed read ack"
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)
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let giftWrap = try NostrProtocol.createPrivateMessage(
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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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let (content, senderPubkey, _) = try NostrProtocol.decryptPrivateMessage(
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giftWrap: giftWrap,
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recipientIdentity: recipient
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)
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#expect(senderPubkey == sender.publicKeyHex)
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#expect(content.hasPrefix("bitchat1:"))
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let base64url = String(content.dropFirst("bitchat1:".count))
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let packetData = try #require(Self.base64URLDecode(base64url))
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let packet = try #require(BitchatPacket.from(packetData), "Failed to decode bitchat packet")
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#expect(packet.type == MessageType.noiseEncrypted.rawValue)
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let payload = try #require(NoisePayload.decode(packet.payload), "Failed to decode NoisePayload")
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switch payload.type {
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case .readReceipt:
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let mid = String(data: payload.data, encoding: .utf8)
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#expect(mid == messageID)
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default:
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Issue.record("Unexpected payload type: \(payload.type)")
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}
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}
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@Test func nostrEventSignatureVerification_roundTrip() throws {
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let identity = try NostrIdentity.generate()
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let event = NostrEvent(
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pubkey: identity.publicKeyHex,
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createdAt: Date(),
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kind: .ephemeralEvent,
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tags: [],
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content: "Signed event"
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)
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let signed = try event.sign(with: identity.schnorrSigningKey())
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#expect(signed.isValidSignature())
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}
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@Test func nostrEventSignatureVerification_detectsTamper() throws {
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let identity = try NostrIdentity.generate()
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let event = NostrEvent(
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pubkey: identity.publicKeyHex,
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createdAt: Date(),
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kind: .ephemeralEvent,
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tags: [],
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content: "Original"
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)
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var signed = try event.sign(with: identity.schnorrSigningKey())
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signed.id = "deadbeef"
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#expect(!signed.isValidSignature())
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}
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@Test func geohashNotesSingleFilter_encodesExpectedTagShape() throws {
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let since = Date(timeIntervalSince1970: 1_234_567)
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let filter = NostrFilter.geohashNotes("u4pruyd", since: since, limit: 42)
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let data = try JSONEncoder().encode(filter)
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let object = try #require(try JSONSerialization.jsonObject(with: data) as? [String: Any])
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#expect(object["kinds"] as? [Int] == [1])
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#expect(object["#g"] as? [String] == ["u4pruyd"])
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#expect(object["since"] as? Int == 1_234_567)
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#expect(object["limit"] as? Int == 42)
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}
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@Test func inboundNostrEventRejectsTooManyTags() throws {
|
|
var eventDict = Self.validInboundEventDict()
|
|
eventDict["tags"] = Array(
|
|
repeating: ["g", "u4pruyd"],
|
|
count: TransportConfig.nostrMaxEventTags + 1
|
|
)
|
|
|
|
#expect(throws: NostrError.invalidEvent) {
|
|
_ = try NostrEvent(from: eventDict)
|
|
}
|
|
}
|
|
|
|
@Test func inboundNostrEventRejectsTooManyTagValues() throws {
|
|
var eventDict = Self.validInboundEventDict()
|
|
eventDict["tags"] = [Array(
|
|
repeating: "value",
|
|
count: TransportConfig.nostrMaxEventTagValues + 1
|
|
)]
|
|
|
|
#expect(throws: NostrError.invalidEvent) {
|
|
_ = try NostrEvent(from: eventDict)
|
|
}
|
|
}
|
|
|
|
@Test func inboundNostrEventRejectsOversizedTagValues() throws {
|
|
var eventDict = Self.validInboundEventDict()
|
|
eventDict["tags"] = [[
|
|
"g",
|
|
String(repeating: "a", count: TransportConfig.nostrMaxEventTagValueBytes + 1)
|
|
]]
|
|
|
|
#expect(throws: NostrError.invalidEvent) {
|
|
_ = try NostrEvent(from: eventDict)
|
|
}
|
|
}
|
|
|
|
@Test func inboundNostrEventAcceptsTagsWithinLimits() throws {
|
|
var eventDict = Self.validInboundEventDict()
|
|
eventDict["tags"] = [["g", "u4pruyd"], ["t", "teleport"]]
|
|
|
|
let event = try NostrEvent(from: eventDict)
|
|
|
|
#expect(event.tags.count == 2)
|
|
}
|
|
|
|
// MARK: - Helpers
|
|
private static func validInboundEventDict() -> [String: Any] {
|
|
[
|
|
"id": String(repeating: "0", count: 64),
|
|
"pubkey": String(repeating: "1", count: 64),
|
|
"created_at": 1_234_567,
|
|
"kind": NostrProtocol.EventKind.ephemeralEvent.rawValue,
|
|
"tags": [["g", "u4pruyd"]],
|
|
"content": "hello",
|
|
"sig": String(repeating: "2", count: 128)
|
|
]
|
|
}
|
|
|
|
private struct LegacyRecipientKeyFixture: Decodable {
|
|
let recipientPrivateKey: String
|
|
|
|
enum CodingKeys: String, CodingKey {
|
|
case recipientPrivateKey = "recipient_private_key"
|
|
}
|
|
}
|
|
|
|
private struct AndroidLegacyEnvelopeFixture: Decodable {
|
|
let androidCommit: String
|
|
let generator: String
|
|
let generatorPatch: String
|
|
let generatorPatchSHA256: String
|
|
let gradleTest: String
|
|
let fixtureSHA256: String
|
|
let recipientPrivateKey: String
|
|
let senderPublicKey: String
|
|
|
|
enum CodingKeys: String, CodingKey {
|
|
case androidCommit = "android_commit"
|
|
case generator
|
|
case generatorPatch = "generator_patch"
|
|
case generatorPatchSHA256 = "generator_patch_sha256"
|
|
case gradleTest = "gradle_test"
|
|
case fixtureSHA256 = "fixture_sha256"
|
|
case recipientPrivateKey = "recipient_private_key"
|
|
case senderPublicKey = "sender_public_key"
|
|
}
|
|
}
|
|
|
|
private func fixtureURL(name: String, extension fileExtension: String = "json") throws -> URL {
|
|
// Bundle.module only exists under SwiftPM; the Xcode test targets
|
|
// resolve resources through the test bundle (same pattern as
|
|
// NoiseProtocolTests' NoiseTestVectors.json loader).
|
|
#if SWIFT_PACKAGE
|
|
let bundle = Bundle.module
|
|
#else
|
|
let bundle = Bundle(for: MockKeychain.self)
|
|
#endif
|
|
return try #require(bundle.url(forResource: name, withExtension: fileExtension))
|
|
}
|
|
|
|
private static func base64URLDecode(_ s: String) -> Data? {
|
|
var str = s.replacingOccurrences(of: "-", with: "+").replacingOccurrences(of: "_", with: "/")
|
|
let rem = str.count % 4
|
|
if rem > 0 { str.append(String(repeating: "=", count: 4 - rem)) }
|
|
return Data(base64Encoded: str)
|
|
}
|
|
|
|
private func expectInvalidEvent(_ operation: () throws -> Void) {
|
|
do {
|
|
try operation()
|
|
Issue.record("Expected NostrError.invalidEvent")
|
|
} catch NostrError.invalidEvent {
|
|
return
|
|
} catch {
|
|
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)")
|
|
}
|
|
}
|
|
}
|