77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
#pragma once
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#include <string>
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#include <vector>
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struct WifiCredential {
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std::string ssid;
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std::string password; // Plaintext in memory; obfuscated with hardware key on disk
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};
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class WifiCredentialStore;
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namespace JsonSettingsIO {
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bool saveWifi(const WifiCredentialStore& store, const char* path);
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bool loadWifi(WifiCredentialStore& store, const char* json, bool* needsResave);
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} // namespace JsonSettingsIO
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/**
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* Singleton class for storing WiFi credentials on the SD card.
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* Passwords are XOR-obfuscated with the device's unique hardware MAC address
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* and base64-encoded before writing to JSON (not cryptographically secure,
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* but prevents casual reading and ties credentials to the specific device).
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*/
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class WifiCredentialStore {
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private:
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static WifiCredentialStore instance;
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std::vector<WifiCredential> credentials;
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std::string lastConnectedSsid;
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std::string lastKnownMacAddress;
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static constexpr size_t MAX_NETWORKS = 8;
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// Private constructor for singleton
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WifiCredentialStore() = default;
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bool loadFromBinaryFile();
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friend bool JsonSettingsIO::saveWifi(const WifiCredentialStore&, const char*);
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friend bool JsonSettingsIO::loadWifi(WifiCredentialStore&, const char*, bool*);
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public:
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// Delete copy constructor and assignment
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WifiCredentialStore(const WifiCredentialStore&) = delete;
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WifiCredentialStore& operator=(const WifiCredentialStore&) = delete;
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// Get singleton instance
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static WifiCredentialStore& getInstance() { return instance; }
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// Save/load from SD card
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bool saveToFile() const;
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bool loadFromFile();
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// Credential management
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bool addCredential(const std::string& ssid, const std::string& password);
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bool removeCredential(const std::string& ssid);
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const WifiCredential* findCredential(const std::string& ssid) const;
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// Get all stored credentials (for UI display)
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const std::vector<WifiCredential>& getCredentials() const { return credentials; }
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// Check if a network is saved
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bool hasSavedCredential(const std::string& ssid) const;
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// Last connected network
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void setLastConnectedSsid(const std::string& ssid);
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const std::string& getLastConnectedSsid() const;
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void clearLastConnectedSsid();
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// Last known device MAC (formatted as AA-BB-CC-DD-EE-FF for instant UI display)
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void setLastKnownMacAddress(const std::string& mac);
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const std::string& getLastKnownMacAddress() const;
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// Clear all credentials
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void clearAll();
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};
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// Helper macro to access credentials store
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#define WIFI_STORE WifiCredentialStore::getInstance()
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