crypto_ecc_dlog.c File Reference

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:

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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. More...
int	GNUNET_CRYPTO_ecc_dlog (struct GNUNET_CRYPTO_EccDlogContext *edc, const struct GNUNET_CRYPTO_EccPoint *input)
	Calculate ECC discrete logarithm for small factors. More...
void	GNUNET_CRYPTO_ecc_random_mod_n (struct GNUNET_CRYPTO_EccScalar *r)
	Generate a random value mod n. More...
void	GNUNET_CRYPTO_ecc_dlog_release (struct GNUNET_CRYPTO_EccDlogContext *edc)
	Release precalculated values. More...
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. More...
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. More...
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. More...
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. More...
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. More...
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. More...
void	GNUNET_CRYPTO_ecc_scalar_from_int (int64_t val, struct GNUNET_CRYPTO_EccScalar *r)
	Create a scalar from int value. More...

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.