ios: PCA Phobos VPN for iPhone (source)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/Shared/PhobosProfile.swift

@@ -0,0 +1,84 @@
+import Foundation
+
+/// Parsed phobos:// payload from the PCA Phobos panel:
+/// [Interface] + [Peer] (WireGuard) + [instance] (wg-obfuscator) + "# pca-tcp = <port>".
+struct PhobosProfile {
+    let raw: String
+
+    init(_ raw: String) { self.raw = raw }
+
+    /// phobos://<urlsafe base64>#name
+    static func fromLink(_ link: String) -> (profile: PhobosProfile, name: String)? {
+        var s = link.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard s.hasPrefix("phobos://") else { return nil }
+        s.removeFirst("phobos://".count)
+        var name = "Phobos"
+        if let hash = s.firstIndex(of: "#") {
+            name = String(s[s.index(after: hash)...]).removingPercentEncoding ?? name
+            s = String(s[..<hash])
+        }
+        var b64 = s.replacingOccurrences(of: "-", with: "+").replacingOccurrences(of: "_", with: "/")
+        while b64.count % 4 != 0 { b64 += "=" }
+        guard let data = Data(base64Encoded: b64), let text = String(data: data, encoding: .utf8),
+              text.contains("[Interface]"), text.contains("[instance]") else { return nil }
+        return (PhobosProfile(text), name)
+    }
+
+    /// Lines of a section, without "= none" placeholders and comments.
+    func lines(_ header: String) -> [(key: String, line: String)] {
+        var inSection = false
+        var out: [(String, String)] = []
+        for rawLine in raw.split(separator: "\n") {
+            let line = rawLine.trimmingCharacters(in: .whitespaces)
+            if line.hasPrefix("[") && line.hasSuffix("]") { inSection = line.lowercased() == header.lowercased(); continue }
+            guard inSection, !line.hasPrefix("#"), let eq = line.firstIndex(of: "=") else { continue }
+            let value = line[line.index(after: eq)...].trimmingCharacters(in: .whitespaces)
+            if value.lowercased() == "none" { continue }
+            out.append((line[..<eq].trimmingCharacters(in: .whitespaces).lowercased(), line))
+        }
+        return out
+    }
+
+    private func value(_ header: String, _ key: String) -> String? {
+        lines(header).first { $0.key == key }.map { line in
+            line.line[line.line.index(after: line.line.firstIndex(of: "=")!)...].trimmingCharacters(in: .whitespaces)
+        }
+    }
+
+    var target: String? { value("[instance]", "target") }
+    var targetHost: String? { target.map { String($0[..<($0.lastIndex(of: ":") ?? $0.endIndex)]) } }
+    var targetPort: Int? { target.flatMap { $0.split(separator: ":").last.flatMap { Int($0) } } }
+
+    /// "# pca-tcp = 443" written by the panel when the server has the TCP fallback.
+    var tcpPort: Int? {
+        for rawLine in raw.split(separator: "\n") {
+            let line = rawLine.trimmingCharacters(in: .whitespaces)
+            if line.hasPrefix("#"), line.contains("pca-tcp"), let eq = line.firstIndex(of: "=") {
+                return Int(line[line.index(after: eq)...].trimmingCharacters(in: .whitespaces))
+            }
+        }
+        return nil
+    }
+
+    func obfuscatorConfig(listen: Int, target: String) -> String {
+        var out = "[instance]\nsource-if = 127.0.0.1\nsource-lport = \(listen)\ntarget = \(target)\n"
+        for item in lines("[instance]") where !["source-if", "source-lport", "target", "verbose"].contains(item.key) {
+            out += item.line + "\n"
+        }
+        return out + "verbose = INFO\n"
+    }
+
+    func wireGuardConfig(endpoint: String, allowedIPs: String?) -> String {
+        var out = "[Interface]\n"
+        for item in lines("[Interface]") where !item.key.hasSuffix("applications") { out += item.line + "\n" }
+        out += "\n[Peer]\n"
+        for item in lines("[Peer]") {
+            switch item.key {
+            case "endpoint": out += "Endpoint = \(endpoint)\n"
+            case "allowedips" where allowedIPs != nil: out += "AllowedIPs = \(allowedIPs!)\n"
+            default: out += item.line + "\n"
+            }
+        }
+        return out
+    }
+}