keygen.c

#include "keygen.h"

// Random master key generator
// void generate_master_key(char *master_key) {
//     const char charset[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
//     srand(time(NULL));
//     for (int i = 0; i < MASTER_KEY_LEN; i++) {
//         master_key[i] = charset[rand() % (sizeof(charset) - 1)];
//     }
//     master_key[MASTER_KEY_LEN] = '\0';
// }

// Simple key derivation - just split the master key in half
// First 16 bytes = encryption key, Last 16 bytes = hash key
void derive_keys(const char *master_key, char *enc_key, char *hash_key) {
    // Copy first 16 bytes to encryption key
    memcpy(enc_key, master_key, DERIVED_KEY_LEN);
    enc_key[DERIVED_KEY_LEN] = '\0';  // Null terminate

    // Copy last 16 bytes to hash key
    memcpy(hash_key, master_key + DERIVED_KEY_LEN, DERIVED_KEY_LEN);
    hash_key[DERIVED_KEY_LEN] = '\0';  // Null terminate
}