ch.epfl.dedis.lib.crypto.bn256

Class BN.GT

java.lang.Object

ch.epfl.dedis.lib.crypto.bn256.BN.GT

Enclosing class:

BN

public static class BN.GT
extends Object

GT represents an element in the GT field. This object is not thread-safe.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ELEM_SIZE
static int	MARSHAL_SIZE

Constructor Summary

Constructors

Constructor and Description
GT() Construct a new GT object, we make no guarantee on its value, please set it later.
GT(ch.epfl.dedis.lib.crypto.bn256.GFp12 p) Construct a new GT object from a GFp12 object.

Method Summary

Modifier and Type	Method and Description
BN.GT	add(BN.GT a, BN.GT b) Perform an addition.
boolean	equals(Object obj)
byte[]	marshal() Turns the element into its byte representation.
BN.GT	neg(BN.GT a) Perform a negation.
BN.GT	scalarMul(BN.GT a, BigInteger k) Perform a scalar multiplication.
String	toString()
BN.GT	unmarshal(byte[] m) Turns the byte representation to the element.

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

ELEM_SIZE

public static final int ELEM_SIZE

See Also:

Constant Field Values

MARSHAL_SIZE

public static final int MARSHAL_SIZE

See Also:

Constant Field Values

Constructor Detail

GT

public GT()

Construct a new GT object, we make no guarantee on its value, please set it later.

GT

public GT(ch.epfl.dedis.lib.crypto.bn256.GFp12 p)

Construct a new GT object from a GFp12 object.

Parameters:

p - is the GFp12 object.

Method Detail

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

scalarMul

public BN.GT scalarMul(BN.GT a,
                       BigInteger k)

Perform a scalar multiplication.

Parameters:

a - is the point.

k - is the scalar.

Returns:

the result which is also this object.

add

public BN.GT add(BN.GT a,
                 BN.GT b)

Perform an addition.

Parameters:

a - is an element.

b - is an element.

Returns:

the resulting element which is also this object.

neg

public BN.GT neg(BN.GT a)

Perform a negation.

Parameters:

a - is the element for negation.

Returns:

the resulting element which is also this object.

marshal

public byte[] marshal()

Turns the element into its byte representation.

Returns:

the marshalled bytes.

unmarshal

public BN.GT unmarshal(byte[] m)

Turns the byte representation to the element.

Parameters:

m - the input bytes.

Returns:

an unmarshalled element when successful, otherwise null.