ECC addition and discreate logarithm for small values. More...

#include "platform.h"
#include <gcrypt.h>
#include "gnunet_util_lib.h"

Include dependency graph for crypto_ecc_dlog.c:

Data Structures
struct	GNUNET_CRYPTO_EccDlogContext
	Internal structure used to cache pre-calculated values for DLOG calculation. More...

Functions
struct GNUNET_CRYPTO_EccDlogContext *	GNUNET_CRYPTO_ecc_dlog_prepare (unsigned int max, unsigned int mem)
	Do pre-calculation for ECC discrete logarithm for small factors.

int	GNUNET_CRYPTO_ecc_dlog (struct GNUNET_CRYPTO_EccDlogContext edc, const struct GNUNET_CRYPTO_EccPoint input)
	Calculate ECC discrete logarithm for small factors.

void	GNUNET_CRYPTO_ecc_random_mod_n (struct GNUNET_CRYPTO_EccScalar *r)
	Generate a random value mod n.

void	GNUNET_CRYPTO_ecc_dlog_release (struct GNUNET_CRYPTO_EccDlogContext *edc)
	Release precalculated values.

void	GNUNET_CRYPTO_ecc_dexp (int val, struct GNUNET_CRYPTO_EccPoint *r)
	Multiply the generator g of the elliptic curve by val to obtain the point on the curve representing val.

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_ecc_dexp_mpi (const struct GNUNET_CRYPTO_EccScalar val, struct GNUNET_CRYPTO_EccPoint r)
	Multiply the generator g of the elliptic curve by val to obtain the point on the curve representing val.

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_ecc_add (const struct GNUNET_CRYPTO_EccPoint a, const struct GNUNET_CRYPTO_EccPoint b, struct GNUNET_CRYPTO_EccPoint *r)
	Add two points on the elliptic curve.

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_ecc_pmul_mpi (const struct GNUNET_CRYPTO_EccPoint p, const struct GNUNET_CRYPTO_EccScalar val, struct GNUNET_CRYPTO_EccPoint *r)
	Multiply the point p on the elliptic curve by val.

enum GNUNET_GenericReturnValue	GNUNET_CRYPTO_ecc_rnd (struct GNUNET_CRYPTO_EccPoint r, struct GNUNET_CRYPTO_EccPoint r_inv)
	Obtain a random point on the curve and its additive inverse.

void	GNUNET_CRYPTO_ecc_rnd_mpi (struct GNUNET_CRYPTO_EccScalar r, struct GNUNET_CRYPTO_EccScalar r_neg)
	Obtain a random scalar for point multiplication on the curve and its additive inverse.

void	GNUNET_CRYPTO_ecc_scalar_from_int (int64_t val, struct GNUNET_CRYPTO_EccScalar *r)
	Create a scalar from int value.

Detailed Description

ECC addition and discreate logarithm for small values.

Allows us to use ECC for computations as long as the result is relativey small.

Author: Christian Grothoff

Definition in file crypto_ecc_dlog.c.

Data Structures

Functions

Detailed Description