BigIntegerFieldElement (Javadocs [I2P+ 2.13.0+]

java.lang.Object
- net.i2p.crypto.eddsa.math.FieldElement
- - net.i2p.crypto.eddsa.math.bigint.BigIntegerFieldElement

All Implemented Interfaces:
Serializable
```
public class BigIntegerFieldElement
extends FieldElement
implements Serializable
```
A particular element of the field \Z/(2^255-19).
See Also:
Serialized Form

Field Summary
Fields
Modifier and Type Field and Description
(package private) BigInteger bi
Variable is package private for encoding.
- Fields inherited from class net.i2p.crypto.eddsa.math.FieldElement
  f

Fields
Modifier and Type	Field and Description
`(package private) BigInteger`	`bi` Variable is package private for encoding.

Constructor Summary
Constructors
Constructor and Description
BigIntegerFieldElement(Field f, BigInteger bi)
Creates a new field element from a BigInteger value.

Constructors
Constructor and Description
`BigIntegerFieldElement(Field f, BigInteger bi)` Creates a new field element from a BigInteger value.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`FieldElement`	`add(FieldElement val)` Adds another field element to this one.
`FieldElement`	`addOne()` Adds one to this field element.
`FieldElement`	`cmov(FieldElement val, int b)` Conditional move.
`FieldElement`	`divide(BigInteger val)` Divide by a BigInteger.
`FieldElement`	`divide(FieldElement val)` Divides this field element by another one.
`boolean`	`equals(Object obj)`
`int`	`hashCode()`
`FieldElement`	`invert()` Computes the multiplicative inverse of this field element.
`boolean`	`isNonZero()` Checks if this field element is non-zero.
`FieldElement`	`mod(FieldElement m)` Return this field element modulo m.
`FieldElement`	`modPow(FieldElement e, FieldElement m)` Return this field element to the power e modulo m.
`FieldElement`	`multiply(FieldElement val)` Multiplies this field element by another one.
`FieldElement`	`negate()` Negates this field element.
`FieldElement`	`pow(FieldElement e)` Return this field element to the power e.
`FieldElement`	`pow22523()` Raises this field element to the power of $2^{252} - 3$.
`FieldElement`	`square()` Squares this field element.
`FieldElement`	`squareAndDouble()` Squares this field element and doubles the result.
`FieldElement`	`subtract(FieldElement val)` Subtracts another field element from this one.
`FieldElement`	`subtractOne()` Subtracts one from this field element.
`String`	`toString()`

Methods inherited from class net.i2p.crypto.eddsa.math.FieldElement
isNegative, toByteArray

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - bi
```
final BigInteger bi
```
    Variable is package private for encoding.
- Constructor Detail
  - BigIntegerFieldElement
```
public BigIntegerFieldElement(Field f,
                              BigInteger bi)
```
    Creates a new field element from a BigInteger value.
    Parameters:
    f - the field this element belongs to
    bi - the BigInteger value
- Method Detail
  - add
```
public FieldElement add(FieldElement val)
```
    Description copied from class: FieldElement
    Adds another field element to this one.
    Specified by:
    add in class FieldElement
    Parameters:
    val - the field element to add
    Returns:
    the sum of this element and val
  - addOne
```
public FieldElement addOne()
```
    Description copied from class: FieldElement
    Adds one to this field element.
    Overrides:
    addOne in class FieldElement
    Returns:
    this element plus one
  - cmov
```
public FieldElement cmov(FieldElement val,
                         int b)
```
    Conditional move.
    Specified by:
    cmov in class FieldElement
    Parameters:
    val - the field element to potentially assign
    b - the condition: 1 means assign val, 0 means keep this element
    Returns:
    this element, potentially modified
  - divide
```
public FieldElement divide(BigInteger val)
```
    Divide by a BigInteger.
    Parameters:
    val - the value to divide by
    Returns:
    the quotient
  - divide
```
public FieldElement divide(FieldElement val)
```
    Description copied from class: FieldElement
    Divides this field element by another one.
    Overrides:
    divide in class FieldElement
    Parameters:
    val - the divisor
    Returns:
    this element divided by val
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    hashCode in class Object
  - invert
```
public FieldElement invert()
```
    Description copied from class: FieldElement
    Computes the multiplicative inverse of this field element.
    Specified by:
    invert in class FieldElement
    Returns:
    the multiplicative inverse of this element
  - isNonZero
```
public boolean isNonZero()
```
    Description copied from class: FieldElement
    Checks if this field element is non-zero.
    Specified by:
    isNonZero in class FieldElement
    Returns:
    true if this element is not equal to zero, false otherwise
  - mod
```
public FieldElement mod(FieldElement m)
```
    Return this field element modulo m.
    Parameters:
    m - the modulus
    Returns:
    the result
  - modPow
```
public FieldElement modPow(FieldElement e,
                           FieldElement m)
```
    Return this field element to the power e modulo m.
    Parameters:
    e - the exponent
    m - the modulus
    Returns:
    the result
  - multiply
```
public FieldElement multiply(FieldElement val)
```
    Description copied from class: FieldElement
    Multiplies this field element by another one.
    Specified by:
    multiply in class FieldElement
    Parameters:
    val - the multiplier
    Returns:
    the product of this element and val
  - negate
```
public FieldElement negate()
```
    Description copied from class: FieldElement
    Negates this field element.
    Specified by:
    negate in class FieldElement
    Returns:
    the negation of this element
  - pow
```
public FieldElement pow(FieldElement e)
```
    Return this field element to the power e.
    Parameters:
    e - the exponent
    Returns:
    the result
  - pow22523
```
public FieldElement pow22523()
```
    Description copied from class: FieldElement
    Raises this field element to the power of $2^{252} - 3$.
    Specified by:
    pow22523 in class FieldElement
    Returns:
    this element raised to the power of $2^{252} - 3$
  - square
```
public FieldElement square()
```
    Description copied from class: FieldElement
    Squares this field element.
    Specified by:
    square in class FieldElement
    Returns:
    this element squared
  - squareAndDouble
```
public FieldElement squareAndDouble()
```
    Description copied from class: FieldElement
    Squares this field element and doubles the result.
    Specified by:
    squareAndDouble in class FieldElement
    Returns:
    (this element squared) * 2
  - subtract
```
public FieldElement subtract(FieldElement val)
```
    Description copied from class: FieldElement
    Subtracts another field element from this one.
    Specified by:
    subtract in class FieldElement
    Parameters:
    val - the field element to subtract
    Returns:
    the difference of this element and val
  - subtractOne
```
public FieldElement subtractOne()
```
    Description copied from class: FieldElement
    Subtracts one from this field element.
    Overrides:
    subtractOne in class FieldElement
    Returns:
    this element minus one
  - toString
```
public String toString()
```
    Overrides:
    toString in class Object

Class BigIntegerFieldElement

Field Summary

Fields inherited from class net.i2p.crypto.eddsa.math.FieldElement

Constructor Summary

Method Summary

Methods inherited from class net.i2p.crypto.eddsa.math.FieldElement

Methods inherited from class java.lang.Object

Field Detail

bi

Constructor Detail

BigIntegerFieldElement

Method Detail

add

addOne

cmov

divide

divide

equals

hashCode

invert

isNonZero

mod

modPow

multiply

negate

pow

pow22523

square

squareAndDouble

subtract

subtractOne

toString