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Fix on-device sign-in failing with HTTP 503 (anisette servers still report the Xcode client identity) #1796

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Fix on-device sign-in failing with HTTP 503 (anisette servers still report the Xcode client identity) #1796

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9 changes: 9 additions & 0 deletions AltStore/Anisette/AnisetteServer.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -53,3 +53,12 @@ extension UserDefaults
}
@NSManaged @objc(anisetteServers) private var _anisetteServers: [[String: Any]]?
}

extension AnisetteServer
{
/// The client identity AltStore presents to Apple in place of the one an anisette server
/// reports, so sign-in does not depend on the identity each server chooses.
static let clientInfo = "<Mac15,7> <macOS;27.0;26A5378j> <com.apple.AuthKit/1 (com.apple.akd/1.0)>"

static let userAgent = "akd/1.0 CFNetwork/808.1.4"
}
10 changes: 9 additions & 1 deletion AltStore/Operations/FetchAnisetteDataOperation.swift
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Expand Up @@ -216,7 +216,15 @@ private extension FetchAnisetteDataOperation
let decoder = Foundation.JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase

let response: Response = try await self.send(URLRequest(url: clientInfoURL), decoder: decoder, anisetteServerURL: serverURL)
let serverResponse: Response = try await self.send(URLRequest(url: clientInfoURL), decoder: decoder, anisetteServerURL: serverURL)

// Present our own client identity rather than the server's, keeping the OS and client
// consistent so Apple grants two-factor trust.
let response = Response(clientInfo: AnisetteServer.clientInfo, userAgent: AnisetteServer.userAgent)
if serverResponse.clientInfo != response.clientInfo
{
Logger.sideload.notice("Replacing anisette client identity \(serverResponse.clientInfo, privacy: .public) with \(response.clientInfo, privacy: .public)")
}

// 2. Load or generate the persisted device identity (16 random bytes -> derives identifier, localUserID, deviceID)
let identity: AnisetteIdentity
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