totp.c File Reference

#include <openssl/hmac.h>
#include <openssl/evp.h>
#include <string.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include "totp.h"

Include dependency graph for totp.c:

Functions
static int	base32_decode (const uint8_t *encoded, uint8_t *result, int bufSize)
char *	generate_totp_code_at_time (const char *base32_secret, time_t current_time)
	Generates a 6-digit TOTP code from a base32-encoded secret for a specific time.
char *	generate_totp_code (const char *base32_secret)
	Generates a 6-digit TOTP code from a base32-encoded secret for the current time.

Function Documentation

base32_decode()

int base32_decode ( const uint8_t * encoded, uint8_t * result, int bufSize )

static

generate_totp_code()

char * generate_totp_code

(

const char *

base32_secret

)

Generates a 6-digit TOTP code from a base32-encoded secret for the current time.

Parameters

base32_secret

The base32-encoded TOTP secret.

Returns

A dynamically allocated string containing the 6-digit TOTP code. The caller is responsible for freeing this string.

generate_totp_code_at_time()

char * generate_totp_code_at_time	(	const char *	base32_secret,
		time_t	current_time )

Generates a 6-digit TOTP code from a base32-encoded secret for a specific time.

Parameters

base32_secret	The base32-encoded TOTP secret.
current_time	The time to generate the TOTP code for.

Returns

A dynamically allocated string containing the 6-digit TOTP code. The caller is responsible for freeing this string.