server/crypto.h

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#pragma once
 
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
#include <ascii-chat/crypto/crypto.h>
#include "client.h"
 
// Initialize server crypto handshake
int server_crypto_init(void);
 
// Perform crypto handshake with client
int server_crypto_handshake(client_info_t *client);
 
// Check if crypto handshake is ready for a specific client
bool crypto_server_is_ready(uint32_t client_id);
 
// Get crypto context for encryption/decryption for a specific client
const crypto_context_t *crypto_server_get_context(uint32_t client_id);
 
// Encrypt a packet for transmission to a specific client
int crypto_server_encrypt_packet(uint32_t client_id, const uint8_t *plaintext, size_t plaintext_len,
                                 uint8_t *ciphertext, size_t ciphertext_size, size_t *ciphertext_len);
 
// Decrypt a received packet from a specific client
int crypto_server_decrypt_packet(uint32_t client_id, const uint8_t *ciphertext, size_t ciphertext_len,
                                 uint8_t *plaintext, size_t plaintext_size, size_t *plaintext_len);
 
// Cleanup crypto resources for a specific client
void crypto_server_cleanup_client(uint32_t client_id);