ec_oct.c File Reference

#include <string.h>
#include <openssl/err.h>
#include <openssl/opensslv.h>
#include "ec_lcl.h"

Go to the source code of this file.

Functions
int	EC_POINT_set_compressed_coordinates_GFp (const EC_GROUP *group, EC_POINT *point, const BIGNUM *x, int y_bit, BN_CTX *ctx)
int	EC_POINT_set_compressed_coordinates_GF2m (const EC_GROUP *group, EC_POINT *point, const BIGNUM *x, int y_bit, BN_CTX *ctx)
size_t	EC_POINT_point2oct (const EC_GROUP *group, const EC_POINT *point, point_conversion_form_t form, unsigned char *buf, size_t len, BN_CTX *ctx)
int	EC_POINT_oct2point (const EC_GROUP *group, EC_POINT *point, const unsigned char *buf, size_t len, BN_CTX *ctx)

Function Documentation

int EC_POINT_oct2point	(	const EC_GROUP *	group,
		EC_POINT *	p,
		const unsigned char *	buf,
		size_t	len,
		BN_CTX *	ctx
	)

Decodes a EC_POINT from a octet string

Parameters

group	underlying EC_GROUP object
p	EC_POINT object
buf	memory buffer with the encoded ec point
len	length of the encoded ec point
ctx	BN_CTX object (optional)

Returns

1 on success and 0 if an error occured

Definition at line 167 of file ec_oct.c.

size_t EC_POINT_point2oct	(	const EC_GROUP *	group,
		const EC_POINT *	p,
		point_conversion_form_t	form,
		unsigned char *	buf,
		size_t	len,
		BN_CTX *	ctx
	)

Encodes a EC_POINT object to a octet string

Parameters

group	underlying EC_GROUP object
p	EC_POINT object
form	point conversion form
buf	memory buffer for the result. If NULL the function returns required buffer size.
len	length of the memory buffer
ctx	BN_CTX object (optional)

Returns

the length of the encoded octet string or 0 if an error occurred

Definition at line 132 of file ec_oct.c.

int EC_POINT_set_compressed_coordinates_GF2m	(	const EC_GROUP *	group,
		EC_POINT *	p,
		const BIGNUM *	x,
		int	y_bit,
		BN_CTX *	ctx
	)

Sets the x9.62 compressed coordinates of a EC_POINT over GF2m

Parameters

group	underlying EC_GROUP object
p	EC_POINT object
x	BIGNUM with x-coordinate
y_bit	integer with the y-Bit (either 0 or 1)
ctx	BN_CTX object (optional)

Returns

1 on success and 0 if an error occured

Definition at line 105 of file ec_oct.c.

int EC_POINT_set_compressed_coordinates_GFp	(	const EC_GROUP *	group,
		EC_POINT *	p,
		const BIGNUM *	x,
		int	y_bit,
		BN_CTX *	ctx
	)

Sets the x9.62 compressed coordinates of a EC_POINT over GFp

Parameters

group	underlying EC_GROUP object
p	EC_POINT object
x	BIGNUM with x-coordinate
y_bit	integer with the y-Bit (either 0 or 1)
ctx	BN_CTX object (optional)

Returns

1 on success and 0 if an error occured

Definition at line 71 of file ec_oct.c.