wg: WireGuard config parser header (C++17, no Qt)

src/wg/wgconfig.h

@@ -0,0 +1,81 @@
+#pragma once
+// src/wg/wgconfig.h — WireGuard .conf parser for Artemis (C++17, no Qt).
+//
+// Parses the standard wg-quick .conf format:
+//
+//   [Interface]
+//   PrivateKey = <base64>
+//   Address    = 10.99.0.3/24
+//   DNS        = 10.99.0.1
+//
+//   [Peer]
+//   PublicKey           = <base64>
+//   PresharedKey        = <base64>           # optional
+//   Endpoint            = relay.example.com:51820
+//   AllowedIPs          = 10.99.0.0/24
+//   PersistentKeepalive = 25
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+namespace wg {
+
+class Config {
+public:
+    // Parse from a .conf file on disk.  Returns false and sets errOut on error.
+    static bool fromFile(const std::string &path, Config &out, std::string &errOut);
+
+    // Parse from an in-memory string (e.g. from an API response).
+    static bool fromString(const std::string &conf, Config &out, std::string &errOut);
+
+    // ── [Interface] ──────────────────────────────────────────────────────────
+
+    // Base64-encoded Curve25519 private key.
+    const std::string &privateKey()  const { return m_privateKey;  }
+
+    // Interface address in CIDR notation, e.g. "10.99.0.3/24".
+    const std::string &address()     const { return m_address;     }
+
+    // Address stripped of prefix length, e.g. "10.99.0.3".
+    std::string addressIP() const;
+
+    // Prefix length from address CIDR, e.g. 24.
+    int addressPrefix() const;
+
+    // ── [Peer] ───────────────────────────────────────────────────────────────
+
+    // Base64-encoded Curve25519 public key of the relay server peer.
+    const std::string &peerPublicKey()   const { return m_peerPubKey;   }
+
+    // Optional pre-shared key.
+    const std::string &presharedKey()    const { return m_presharedKey; }
+
+    // Peer endpoint hostname or IP address (no port).
+    std::string endpointHost() const;
+
+    // Peer endpoint port.
+    int endpointPort() const;
+
+    // AllowedIPs list (typically ["10.99.0.0/24"] for split tunnel).
+    const std::vector<std::string> &allowedIPs() const { return m_allowedIPs; }
+
+    // PersistentKeepalive interval in seconds (0 = disabled).
+    int persistentKeepalive() const { return m_keepalive; }
+
+    bool valid() const { return m_valid; }
+
+private:
+    bool          m_valid        = false;
+    std::string   m_privateKey;
+    std::string   m_address;
+    std::string   m_peerPubKey;
+    std::string   m_presharedKey;
+    std::string   m_endpoint;      // raw "host:port" or "[host]:port"
+    std::vector<std::string> m_allowedIPs;
+    int           m_keepalive     = 25;
+
+    static bool parse(const std::string &text, Config &out, std::string &errOut);
+};
+
+} // namespace wg