Method Detail

• cryptoCoreRistretto255IsValidPoint

   abstract boolean cryptoCoreRistretto255IsValidPoint(Array<byte> point)

  Returns whether the passed bytes represent a valid Ristretto255 point.

  Parameters:

  point - the point to check, should be RISTRETTO255_BYTES bytes

• cryptoCoreRistretto255Random

   abstract void cryptoCoreRistretto255Random(Array<byte> point)

  Chooses a random Ristretto255 point and puts its representation to {@code point}

  Parameters:

  point - the target array, must be RISTRETTO255_BYTES bytes

• cryptoCoreRistretto255FromHash

   abstract boolean cryptoCoreRistretto255FromHash(Array<byte> point, Array<byte> hash)

  Maps a RISTRETTO255_HASH_BYTES bytes hash to a Ristretto255 pointand puts its representation to {@code point}.

  Parameters:

  point - the target array, must be RISTRETTO255_BYTES bytes

  hash - the hash, must be RISTRETTO255_HASH_BYTES bytes

• cryptoScalarmultRistretto255

   abstract boolean cryptoScalarmultRistretto255(Array<byte> result, Array<byte> n, Array<byte> point)

  Multiplies the given Ristretto255 {@code point} by the scalar {@code n} and puts therepresentation of the result into {@code result}.

  Parameters:

  result - the target array, must be RISTRETTO255_BYTES bytes

  n - the scalar, must be RISTRETTO255_SCALAR_BYTES bytes

  point - the Ristretto255 point, must be RISTRETTO255_BYTES bytes

• cryptoScalarmultRistretto255Base

   abstract boolean cryptoScalarmultRistretto255Base(Array<byte> result, Array<byte> n)

  Multiplies the Ristretto255 base point by the scalar {@code n} and puts therepresentation of the result into {@code result}.

  Parameters:

  result - the target array, must be RISTRETTO255_BYTES bytes

  n - the scalar, must be RISTRETTO255_SCALAR_BYTES bytes

• cryptoCoreRistretto255Add

   abstract boolean cryptoCoreRistretto255Add(Array<byte> result, Array<byte> p, Array<byte> q)

  Adds two given Ristretto255 points {@code p} and {@code q} and puts the representation ofthe result into {@code result}.

  Parameters:

  result - the target array, must be RISTRETTO255_BYTES bytes

  p - the first Ristretto255 point, must be RISTRETTO255_BYTES bytes

  q - the second Ristretto255 point, must be RISTRETTO255_BYTES bytes

• cryptoCoreRistretto255Sub

   abstract boolean cryptoCoreRistretto255Sub(Array<byte> result, Array<byte> p, Array<byte> q)

  Subtracts two given Ristretto255 points {@code p} and {@code q} and puts therepresentation of the result into {@code result}.

  Parameters:

  result - the target array, must be RISTRETTO255_BYTES bytes

  p - the first Ristretto255 point, must be RISTRETTO255_BYTES bytes

  q - the second Ristretto255 point, must be RISTRETTO255_BYTES bytes

• cryptoCoreRistretto255ScalarRandom

   abstract void cryptoCoreRistretto255ScalarRandom(Array<byte> scalar)

  Creates a random scalar value in {@code [0, l[} with {@code L} being the order of theRistretto255 group.

  Parameters:

  scalar - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

• cryptoCoreRistretto255ScalarReduce

   abstract void cryptoCoreRistretto255ScalarReduce(Array<byte> result, Array<byte> scalar)

  Reduces a possibly larger scalar value to {@code [0, l[} with {@code L} being the orderof the Ristretto255 group.

  Parameters:

  result - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

  scalar - the scalar to reduce, must be RISTRETTO255_NON_REDUCED_SCALAR_BYTES bytes

• cryptoCoreRistretto255ScalarInvert

   abstract boolean cryptoCoreRistretto255ScalarInvert(Array<byte> result, Array<byte> scalar)

  Calculates the multiplicative inverse of the given scalar value.

  Parameters:

  result - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

  scalar - the scalar to invert, must be RISTRETTO255_SCALAR_BYTES bytes

• cryptoCoreRistretto255ScalarNegate

   abstract void cryptoCoreRistretto255ScalarNegate(Array<byte> result, Array<byte> scalar)

  Calculates the additive inverse of the given scalar value.

  Parameters:

  result - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

  scalar - the scalar to negate, must be RISTRETTO255_SCALAR_BYTES bytes

• cryptoCoreRistretto255ScalarComplement

   abstract void cryptoCoreRistretto255ScalarComplement(Array<byte> result, Array<byte> scalar)

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

  Parameters:

  result - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

  scalar - the scalar to complement, must be RISTRETTO255_SCALAR_BYTES bytes

• cryptoCoreRistretto255ScalarAdd

   abstract void cryptoCoreRistretto255ScalarAdd(Array<byte> result, Array<byte> x, Array<byte> y)

  Adds two scalars {@code x} and {@code y} modulo {@code L} with {@code L} being the orderof the Ristretto255 group.

  Parameters:

  result - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

  x - the first scalar, must be RISTRETTO255_SCALAR_BYTES bytes

  y - the second scalar, must be RISTRETTO255_SCALAR_BYTES bytes

• cryptoCoreRistretto255ScalarSub

   abstract void cryptoCoreRistretto255ScalarSub(Array<byte> result, Array<byte> x, Array<byte> y)

  Subtracts two scalars {@code x} and {@code y} modulo {@code L} with {@code L} being theorder of the Ristretto255 group.

  Parameters:

  result - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

  x - the first scalar, must be RISTRETTO255_SCALAR_BYTES bytes

  y - the second scalar, must be RISTRETTO255_SCALAR_BYTES bytes

• cryptoCoreRistretto255ScalarMul

   abstract void cryptoCoreRistretto255ScalarMul(Array<byte> result, Array<byte> x, Array<byte> y)

  Multiplies two scalars {@code x} and {@code y} modulo {@code L} with {@code L} being theorder of the Ristretto255 group.

  Parameters:

  result - the target array, must be RISTRETTO255_SCALAR_BYTES bytes

  x - the first scalar, must be RISTRETTO255_SCALAR_BYTES bytes

  y - the second scalar, must be RISTRETTO255_SCALAR_BYTES bytes