89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
#ifndef PACKET_H
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#define PACKET_H
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <errno.h>
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#include <signal.h>
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#include <time.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/epoll.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <sodium.h>
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#include <libgen.h>
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#include <wchar.h>
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#include "config.h"
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#define ZSM_TYP_AUTH 0x1
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#define ZSM_TYP_MESSAGE 0x2
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#define ZSM_TYP_UPDATE_MESSAGE 0x3
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#define ZSM_TYP_DELETE_MESSAGE 0x4
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#define ZSM_TYP_ERROR 0x5
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#define ZSM_TYP_INFO 0x6
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#define ZSM_STA_SUCCESS 0x1
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#define ZSM_STA_INVALID_TYPE 0x2
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#define ZSM_STA_INVALID_LENGTH 0x3
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#define ZSM_STA_TOO_LONG 0x4
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#define ZSM_STA_READING_SOCKET 0x5
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#define ZSM_STA_WRITING_SOCKET 0x6
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#define ZSM_STA_UNKNOWN_USER 0x7
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#define ZSM_STA_MEMORY_ALLOCATION 0x8
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#define ZSM_STA_ERROR_ENCRYPT 0x9
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#define ZSM_STA_ERROR_DECRYPT 0xA
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#define ZSM_STA_ERROR_AUTHENTICATE 0xB
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#define ZSM_STA_ERROR_INTEGRITY 0xC
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#define ZSM_STA_UNAUTHORISED 0xD
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#define ZSM_STA_AUTHORISED 0xE
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#define ZSM_STA_CLOSED_CONNECTION 0xF
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#define PORT 20247
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#define MAX_NAME 32 /* Max username length */
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#define MAX_DATA_LENGTH 8192
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#define ADDRESS_SIZE MAX_NAME + 1 + 255 /* 1 for @, 255 for domain, defined in RFC 5321, Section 4.5.3.1.2 */
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#define CHALLENGE_SIZE 32
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#define HASH_SIZE crypto_generichash_BYTES
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#define NONCE_SIZE crypto_box_NONCEBYTES /* 24 */
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#define ADDITIONAL_SIZE crypto_box_MACBYTES /* 16 */
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#define MAX_MESSAGE_LENGTH MAX_DATA_LENGTH - MAX_NAME * 2 - NONCE_SIZE
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typedef struct packet_t {
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uint8_t status;
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uint8_t type;
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uint32_t length;
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uint8_t *data;
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uint8_t *signature;
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} packet_t;
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typedef struct message_t {
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uint8_t author[MAX_NAME];
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uint8_t recipient[MAX_NAME];
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uint8_t *content;
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time_t creation;
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} message_t;
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#include "key.h"
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/* Utilities functions */
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void print_packet(packet_t *pkt);
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int recv_packet(packet_t *pkt, int fd, uint8_t required_type);
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packet_t *create_packet(uint8_t status, uint8_t type, uint32_t length, uint8_t *data, uint8_t *signature);
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int send_packet(packet_t *pkt, int fd);
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void free_packet(packet_t *pkt);
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int verify_packet(packet_t *pkt, int fd);
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uint8_t *create_signature(uint8_t *data, uint32_t length, uint8_t *sk);
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#endif
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