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crosspoint-reader/lib/KOReaderSync/KOReaderCredentialStore.h

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#pragma once
#include <cstdint>
#include <string>
// Document matching method for KOReader sync
enum class DocumentMatchMethod : uint8_t {
FILENAME = 0, // Match by filename (simpler, works across different file sources)
BINARY = 1, // Match by partial MD5 of file content (more accurate, but files must be identical)
};
/**
* Singleton class for storing KOReader sync credentials on the SD card.
* Credentials are stored in /sd/.crosspoint/koreader.bin with basic
* XOR obfuscation to prevent casual reading (not cryptographically secure).
*/
class KOReaderCredentialStore {
private:
static KOReaderCredentialStore instance;
std::string username;
std::string password;
std::string serverUrl; // Custom sync server URL (empty = default)
DocumentMatchMethod matchMethod = DocumentMatchMethod::FILENAME; // Default to filename for compatibility
// Private constructor for singleton
KOReaderCredentialStore() = default;
// XOR obfuscation (symmetric - same for encode/decode)
void obfuscate(std::string& data) const;
public:
// Delete copy constructor and assignment
KOReaderCredentialStore(const KOReaderCredentialStore&) = delete;
KOReaderCredentialStore& operator=(const KOReaderCredentialStore&) = delete;
// Get singleton instance
static KOReaderCredentialStore& getInstance() { return instance; }
// Save/load from SD card
bool saveToFile() const;
bool loadFromFile();
// Credential management
void setCredentials(const std::string& user, const std::string& pass);
const std::string& getUsername() const { return username; }
const std::string& getPassword() const { return password; }
// Get MD5 hash of password for API authentication
std::string getMd5Password() const;
// Check if credentials are set
bool hasCredentials() const;
// Clear credentials
void clearCredentials();
// Server URL management
void setServerUrl(const std::string& url);
const std::string& getServerUrl() const { return serverUrl; }
// Get base URL for API calls (with http:// normalization if no protocol, falls back to default)
std::string getBaseUrl() const;
// Document matching method
void setMatchMethod(DocumentMatchMethod method);
DocumentMatchMethod getMatchMethod() const { return matchMethod; }
};
// Helper macro to access credential store
#define KOREADER_STORE KOReaderCredentialStore::getInstance()