crypto.h

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#ifndef CRYPTO_H
#define CRYPTO_H
 
// AES encryption parameters
// Key must be 16 bytes (128 bits) for AES-128
// IV is used to initialize the cipher and must be 16 bytes as well
#define AES_BLOCK_SIZE 16
 
#define SHA256_DIGEST_SIZE 32
 
int encrypt_buffer(const char *in, size_t in_len,           // Encrypt a buffer using AES
    char **out, size_t *out_len);
int decrypt_buffer(const char *in, size_t in_len,           // Decrypt a buffer using AES
    char **out, size_t *out_len);
 
int hash_string(const char *input, u8 *digest);             // Hash a string using SHA-256
bool are_hash_equals(const u8 *h1, const u8 *h2);           // Compare two hashes
void hash_to_str(const u8 *digest, char *output);           // Convert a hash to a string representation
 
 
#endif /* CRYPTO_H */