utils.h File Reference

#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdio.h>

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Functions
void	hex_to_bytes (const char *hex, unsigned char *bytes, size_t len)
void	print_hex (const unsigned char *bytes, size_t len)
int	bytes_to_hex (const unsigned char *input, char *output, size_t len)
uint32_t	bytes_to_uint32 (const unsigned char *input)
void	uint32_to_bytes (const uint32_t input, unsigned char *output)
uint32_t	bytes_to_uint32_be (const unsigned char *input)
void	uint32_to_bytes_be (const uint32_t input, unsigned char *output)
void	shift_left_one (unsigned char *input, size_t length)
int	constant_time_compare (const unsigned char *a, const unsigned char *b, size_t len)
void	secure_zero (void *p, size_t len)
	An analogue of memset_explicit for older versions of glibc.

Function Documentation

bytes_to_hex()

int bytes_to_hex	(	const unsigned char *	input,
		char *	output,
		size_t	len )

bytes_to_uint32()

uint32_t bytes_to_uint32

(

const unsigned char *

input

)

bytes_to_uint32_be()

uint32_t bytes_to_uint32_be

(

const unsigned char *

input

)

constant_time_compare()

int constant_time_compare	(	const unsigned char *	a,
		const unsigned char *	b,
		size_t	len )

hex_to_bytes()

void hex_to_bytes	(	const char *	hex,
		unsigned char *	bytes,
		size_t	len )

print_hex()

void print_hex	(	const unsigned char *	bytes,
		size_t	len )

secure_zero()

void secure_zero	(	void *	p,
		size_t	len )

An analogue of memset_explicit for older versions of glibc.

Parameters

p	A pointer to the resource to be reset.
len	The length to be reset to zero

shift_left_one()

void shift_left_one	(	unsigned char *	input,
		size_t	length )

uint32_to_bytes()

void uint32_to_bytes	(	const uint32_t	input,
		unsigned char *	output )

uint32_to_bytes_be()

void uint32_to_bytes_be	(	const uint32_t	input,
		unsigned char *	output )