org.spongycastle.pqc.math.linearalgebra

Interface GFElement

All Known Implementing Classes:

GF2nElement, GF2nONBElement, GF2nPolynomialElement

public interface GFElement

This interface defines a finite field element. It is implemented by the class GF2nElement.

See Also:

GF2nElement

Method Summary

Modifier and Type	Method and Description
GFElement	add(GFElement addend) Compute the sum of this element and the addend.
void	addToThis(GFElement addend) Compute the sum of this element and the addend, overwriting this element.
java.lang.Object	clone()
boolean	equals(java.lang.Object other) Compare this curve with another object.
int	hashCode()
GFElement	invert() Compute the multiplicative inverse of this element.
boolean	isOne() Checks whether this element is one.
boolean	isZero() Checks whether this element is zero.
GFElement	multiply(GFElement factor) Compute the product of this element and factor.
void	multiplyThisBy(GFElement factor) Compute this * factor (overwrite this).
GFElement	subtract(GFElement minuend) Compute the difference of this element and minuend.
void	subtractFromThis(GFElement minuend) Compute the difference of this element and minuend, overwriting this element.
byte[]	toByteArray() Returns this element as byte array.
java.math.BigInteger	toFlexiBigInt() Returns this element as FlexiBigInt.
java.lang.String	toString() Return a String representation of this element.
java.lang.String	toString(int radix) Return a String representation of this element.

Method Detail

clone

java.lang.Object clone()

Returns:

a copy of this GFElement

equals

boolean equals(java.lang.Object other)

Compare this curve with another object.

Overrides:

equals in class java.lang.Object

Parameters:

other - the other object

Returns:

the result of the comparison

hashCode

int hashCode()

Overrides:

hashCode in class java.lang.Object

Returns:

the hash code of this element

isZero

boolean isZero()

Checks whether this element is zero.

Returns:

true if this is the zero element

isOne

boolean isOne()

Checks whether this element is one.

Returns:

true if this is the one element

add

GFElement add(GFElement addend)
       throws java.lang.RuntimeException

Compute the sum of this element and the addend.

Parameters:

addend - the addend

Returns:

this + other (newly created)

Throws:

java.lang.RuntimeException

addToThis

void addToThis(GFElement addend)
        throws java.lang.RuntimeException

Compute the sum of this element and the addend, overwriting this element.

Parameters:

addend - the addend

Throws:

java.lang.RuntimeException

subtract

GFElement subtract(GFElement minuend)
            throws java.lang.RuntimeException

Compute the difference of this element and minuend.

Parameters:

minuend - the minuend

Returns:

this - minuend (newly created)

Throws:

java.lang.RuntimeException

subtractFromThis

void subtractFromThis(GFElement minuend)

Compute the difference of this element and minuend, overwriting this element.

Parameters:

minuend - the minuend

multiply

GFElement multiply(GFElement factor)
            throws java.lang.RuntimeException

Compute the product of this element and factor.

Parameters:

factor - the factor

Returns:

this * factor (newly created)

Throws:

java.lang.RuntimeException

multiplyThisBy

void multiplyThisBy(GFElement factor)
             throws java.lang.RuntimeException

Compute this * factor (overwrite this).

Parameters:

factor - the factor

Throws:

java.lang.RuntimeException

invert

GFElement invert()
          throws java.lang.ArithmeticException

Compute the multiplicative inverse of this element.

Returns:

this^-1 (newly created)

Throws:

java.lang.ArithmeticException - if this is the zero element.

toFlexiBigInt

java.math.BigInteger toFlexiBigInt()

Returns this element as FlexiBigInt. The conversion is P1363-conform.

Returns:

this element as BigInt

toByteArray

byte[] toByteArray()

Returns this element as byte array. The conversion is P1363-conform.

Returns:

this element as byte array

toString

java.lang.String toString()

Return a String representation of this element.

Overrides:

toString in class java.lang.Object

Returns:

String representation of this element

toString

java.lang.String toString(int radix)

Return a String representation of this element. radix specifies the radix of the String representation.

Parameters:

radix - specifies the radix of the String representation

Returns:

String representation of this element with the specified radix