Package com.goterl.lazysodium.interfaces

Interface Ristretto255.Native

All Known Implementing Classes:

LazySodium, LazySodiumJava

Enclosing interface:

Ristretto255

public static interface Ristretto255.Native

Method Summary

Modifier and Type	Method	Description
boolean	cryptoCoreRistretto255Add(byte[] result, byte[] p, byte[] q)	Adds two given Ristretto255 points p and q and puts the representation of the result into result.
boolean	cryptoCoreRistretto255FromHash(byte[] point, byte[] hash)	Maps a Ristretto255.RISTRETTO255_HASH_BYTES bytes hash to a Ristretto255 point and puts its representation to point.
boolean	cryptoCoreRistretto255IsValidPoint(byte[] point)	Returns whether the passed bytes represent a valid Ristretto255 point.
void	cryptoCoreRistretto255Random(byte[] point)	Chooses a random Ristretto255 point and puts its representation to point
void	cryptoCoreRistretto255ScalarAdd(byte[] result, byte[] x, byte[] y)	Adds two scalars x and y modulo L with L being the order of the Ristretto255 group.
void	cryptoCoreRistretto255ScalarComplement(byte[] result, byte[] scalar)	Calculates the result R for the given scalar value such that R + scalar = 1 (mod L) with L being the order of the Ristretto255 group.
boolean	cryptoCoreRistretto255ScalarInvert(byte[] result, byte[] scalar)	Calculates the multiplicative inverse of the given scalar value.
void	cryptoCoreRistretto255ScalarMul(byte[] result, byte[] x, byte[] y)	Multiplies two scalars x and y modulo L with L being the order of the Ristretto255 group.
void	cryptoCoreRistretto255ScalarNegate(byte[] result, byte[] scalar)	Calculates the additive inverse of the given scalar value.
void	cryptoCoreRistretto255ScalarRandom(byte[] scalar)	Creates a random scalar value in [0, l[ with L being the order of the Ristretto255 group.
void	cryptoCoreRistretto255ScalarReduce(byte[] result, byte[] scalar)	Reduces a possibly larger scalar value to [0, l[ with L being the order of the Ristretto255 group.
void	cryptoCoreRistretto255ScalarSub(byte[] result, byte[] x, byte[] y)	Subtracts two scalars x and y modulo L with L being the order of the Ristretto255 group.
boolean	cryptoCoreRistretto255Sub(byte[] result, byte[] p, byte[] q)	Subtracts two given Ristretto255 points p and q and puts the representation of the result into result.
boolean	cryptoScalarmultRistretto255(byte[] result, byte[] n, byte[] point)	Multiplies the given Ristretto255 point by the scalar n and puts the representation of the result into result.
boolean	cryptoScalarmultRistretto255Base(byte[] result, byte[] n)	Multiplies the Ristretto255 base point by the scalar n and puts the representation of the result into result.

Method Detail

cryptoCoreRistretto255IsValidPoint

boolean cryptoCoreRistretto255IsValidPoint(byte[] point)

Returns whether the passed bytes represent a valid Ristretto255 point.

Parameters:

point - the point to check, should be Ristretto255.RISTRETTO255_BYTES bytes

Returns:

true if valid

cryptoCoreRistretto255Random

void cryptoCoreRistretto255Random(byte[] point)

Chooses a random Ristretto255 point and puts its representation to point

Parameters:

point - the target array, must be Ristretto255.RISTRETTO255_BYTES bytes

cryptoCoreRistretto255FromHash

boolean cryptoCoreRistretto255FromHash(byte[] point,
                                       byte[] hash)

Maps a Ristretto255.RISTRETTO255_HASH_BYTES bytes hash to a Ristretto255 point and puts its representation to point.

Parameters:

point - the target array, must be Ristretto255.RISTRETTO255_BYTES bytes

hash - the hash, must be Ristretto255.RISTRETTO255_HASH_BYTES bytes

Returns:

true if successful

cryptoScalarmultRistretto255

boolean cryptoScalarmultRistretto255(byte[] result,
                                     byte[] n,
                                     byte[] point)

Multiplies the given Ristretto255 point by the scalar n and puts the representation of the result into result.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_BYTES bytes

n - the scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

point - the Ristretto255 point, must be Ristretto255.RISTRETTO255_BYTES bytes

Returns:

true if successful

cryptoScalarmultRistretto255Base

boolean cryptoScalarmultRistretto255Base(byte[] result,
                                         byte[] n)

Multiplies the Ristretto255 base point by the scalar n and puts the representation of the result into result.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_BYTES bytes

n - the scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

Returns:

true if successful

cryptoCoreRistretto255Add

boolean cryptoCoreRistretto255Add(byte[] result,
                                  byte[] p,
                                  byte[] q)

Adds two given Ristretto255 points p and q and puts the representation of the result into result.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_BYTES bytes

p - the first Ristretto255 point, must be Ristretto255.RISTRETTO255_BYTES bytes

q - the second Ristretto255 point, must be Ristretto255.RISTRETTO255_BYTES bytes

Returns:

true if successful

cryptoCoreRistretto255Sub

boolean cryptoCoreRistretto255Sub(byte[] result,
                                  byte[] p,
                                  byte[] q)

Subtracts two given Ristretto255 points p and q and puts the representation of the result into result.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_BYTES bytes

p - the first Ristretto255 point, must be Ristretto255.RISTRETTO255_BYTES bytes

q - the second Ristretto255 point, must be Ristretto255.RISTRETTO255_BYTES bytes

Returns:

true if successful

cryptoCoreRistretto255ScalarRandom

void cryptoCoreRistretto255ScalarRandom(byte[] scalar)

Creates a random scalar value in [0, l[ with L being the order of the Ristretto255 group.

Parameters:

scalar - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

cryptoCoreRistretto255ScalarReduce

void cryptoCoreRistretto255ScalarReduce(byte[] result,
                                        byte[] scalar)

Reduces a possibly larger scalar value to [0, l[ with L being the order of the Ristretto255 group.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

scalar - the scalar to reduce, must be Ristretto255.RISTRETTO255_NON_REDUCED_SCALAR_BYTES bytes

cryptoCoreRistretto255ScalarInvert

boolean cryptoCoreRistretto255ScalarInvert(byte[] result,
                                           byte[] scalar)

Calculates the multiplicative inverse of the given scalar value.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

scalar - the scalar to invert, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

Returns:

true if successful

cryptoCoreRistretto255ScalarNegate

void cryptoCoreRistretto255ScalarNegate(byte[] result,
                                        byte[] scalar)

Calculates the additive inverse of the given scalar value.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

scalar - the scalar to negate, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

cryptoCoreRistretto255ScalarComplement

void cryptoCoreRistretto255ScalarComplement(byte[] result,
                                            byte[] scalar)

Calculates the result R for the given scalar value such that R + scalar = 1 (mod L) with L being the order of the Ristretto255 group.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

scalar - the scalar to complement, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

cryptoCoreRistretto255ScalarAdd

void cryptoCoreRistretto255ScalarAdd(byte[] result,
                                     byte[] x,
                                     byte[] y)

Adds two scalars x and y modulo L with L being the order of the Ristretto255 group.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

x - the first scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

y - the second scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

cryptoCoreRistretto255ScalarSub

void cryptoCoreRistretto255ScalarSub(byte[] result,
                                     byte[] x,
                                     byte[] y)

Subtracts two scalars x and y modulo L with L being the order of the Ristretto255 group.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

x - the first scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

y - the second scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

cryptoCoreRistretto255ScalarMul

void cryptoCoreRistretto255ScalarMul(byte[] result,
                                     byte[] x,
                                     byte[] y)

Multiplies two scalars x and y modulo L with L being the order of the Ristretto255 group.

Parameters:

result - the target array, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

x - the first scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes

y - the second scalar, must be Ristretto255.RISTRETTO255_SCALAR_BYTES bytes