purr-c/purr.h

#ifndef __PURR_H_
#define __PURR_H_

#include <stdint.h>
#include <stdio.h>
#include <stdbool.h>
#include <sys/mman.h>

#include <bearssl.h>

#define HTTP_PORT 80
#define HTTPS_PORT 443

#define HEADER_MAX_LEN 8192

#define NET_BLOCK_SIZE 512

#define KEY_LEN 32
#define IV_LEN br_aes_big_BLOCK_SIZE

#define NO_RANDOMIZE_IV

#define RESET_MMAP(file) do{file.offset = 0; file.cursor = 0}while(0);
#define ERROR_MMAP(file) (file.data == MAP_FAILED || file.data == NULL)
#define CLOSE_MMAP(file) do{if(file.data != MAP_FAILED && file.data != NULL) munmap(file.data, file.size);}while(0);

struct connection_information {
    br_sslio_context *ioc;
    br_ssl_client_context *sc;
    const char *request;
    size_t request_size;
    struct mmap_file *input, *output;
    int socket;
    bool send, ssl;
    bool no_strip, debug;
};

struct transmission_information {
    br_sslio_context *ioc;
    struct mmap_file *file;
    int socket;
    bool no_strip, debug, ssl;
};

struct mmap_file {
    uint8_t *data, *cursor;
    off_t size, offset;
    int prot, flags;
};

/* sockets.c */
int socket_read(void *, uint8_t *, size_t);
int socket_write(void *, const uint8_t *, size_t);

/* urls.c */
int clean_up_link(const char *, char *, char *, char *);
int host_connect(const char *, const char *, bool);

/* files.c */
struct mmap_file create_mmap_from_file(const char *, int);
int read_from_mmap(struct mmap_file *, int);
int write_into_mmap(struct mmap_file *, const uint8_t *, int);
size_t ssl_to_mmap(struct transmission_information);
size_t mmap_to_ssl(struct transmission_information);

/* comm.c */
int send_and_receive(struct connection_information *);

/* formats.c */
char *print_hex(uint8_t *, int, bool);

/* encrypt.c */
struct mmap_file encrypt_mmap(struct mmap_file, uint8_t **, uint8_t **);

#endif // __PURR_H_