contrac.c File Reference

Core Contact Tracing functionality. More...

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stddef.h>
#include <time.h>
#include <openssl/crypto.h>
#include <openssl/rand.h>
#include <openssl/err.h>
#include "contrac/log.h"
#include "contrac/utils.h"
#include "contrac/rpi.h"
#include "contrac/contrac.h"

Include dependency graph for contrac.c:

Data Structures
struct	Contrac
	The core structure for storing Contact Tracing state. More...

Macros
#define	STATUS_TK   (1 << 0)
#define	STATUS_DTK   (1 << 1)
#define	STATUS_RPI   (1 << 2)
#define	STATUS_INITIALISED   (STATUS_TK | STATUS_DTK | STATUS_RPI)

Functions
Contrac *	contrac_new ()
void	contrac_delete (Contrac *data)
bool	contrac_generate_tracing_key (Contrac *data)
bool	contrac_set_day_number (Contrac *data, uint32_t day_number)
bool	contrac_set_time_interval_number (Contrac *data, uint8_t time_interval_number)
bool	contrac_get_initialised (Contrac const *data)
uint32_t	contrac_get_day_number (Contrac *data)
uint8_t	contrac_get_time_interval_number (Contrac *data)
void	contrac_set_tracing_key (Contrac *data, unsigned char const *tracing_key)
unsigned char const *	contrac_get_tracing_key (Contrac const *data)
void	contrac_get_tracing_key_base64 (Contrac const *data, char *base64)
bool	contrac_set_tracing_key_base64 (Contrac *data, char const *tracing_key)
unsigned char const *	contrac_get_daily_key (Contrac const *data)
void	contrac_get_daily_key_base64 (Contrac const *data, char *base64)
unsigned char const *	contrac_get_proximity_id (Contrac const *data)
void	contrac_get_proximity_id_base64 (Contrac const *data, char *base64)
bool	contrac_update_current_time (Contrac *data)

Detailed Description

Core Contact Tracing functionality.

Author

David Llewellyn-Jones david.nosp@m.@fly.nosp@m.pig.c.nosp@m.o.uk

Version

0.01

LICENSE

Copyright David Llewellyn-Jones, 2020 Released under the GPLv2.

DESCRIPTION

This class provides the core Contact Tracing functionality. It provides an interfaces for:

1. Generating a random Tracing Key.
2. Generating a Daily Tracing Key based on the current day number.
3. Generating a Rolling Proximity Identifier based on the current time interval number.

Values can be extracted and set in binary or base64 format.