java.lang.Object
- org.bouncycastle.pqc.math.ntru.polynomial.ProductFormPolynomial

All Implemented Interfaces:

Polynomial
```
public class ProductFormPolynomial
extends java.lang.Object
implements Polynomial
```
A polynomial of the form f1*f2+f3, where f1,f2,f3 are very sparsely populated ternary polynomials.

Constructor Summary

Constructors
Constructor	Description
`ProductFormPolynomial(SparseTernaryPolynomial f1, SparseTernaryPolynomial f2, SparseTernaryPolynomial f3)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(java.lang.Object obj)`
`static ProductFormPolynomial`	`fromBinary(byte[] data, int N, int df1, int df2, int df3Ones, int df3NegOnes)`
`static ProductFormPolynomial`	`fromBinary(java.io.InputStream is, int N, int df1, int df2, int df3Ones, int df3NegOnes)`
`static ProductFormPolynomial`	`generateRandom(int N, int df1, int df2, int df3Ones, int df3NegOnes, java.security.SecureRandom random)`
`int`	`hashCode()`
`BigIntPolynomial`	`mult(BigIntPolynomial b)`	Multiplies the polynomial by a `BigIntPolynomial`, taking the indices mod N.
`IntegerPolynomial`	`mult(IntegerPolynomial b)`	Multiplies the polynomial by an `IntegerPolynomial`, taking the indices mod `N`.
`IntegerPolynomial`	`mult(IntegerPolynomial poly2, int modulus)`	Multiplies the polynomial by an `IntegerPolynomial`, taking the coefficient values mod `modulus` and the indices mod `N`.
`byte[]`	`toBinary()`
`IntegerPolynomial`	`toIntegerPolynomial()`	Returns a polynomial that is equal to this polynomial (in the sense that `Polynomial.mult(IntegerPolynomial, int)` returns equal `IntegerPolynomial`s).

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

Constructor Detail

ProductFormPolynomial

public ProductFormPolynomial(SparseTernaryPolynomial f1,
                             SparseTernaryPolynomial f2,
                             SparseTernaryPolynomial f3)

Method Detail

generateRandom

public static ProductFormPolynomial generateRandom(int N,
                                                   int df1,
                                                   int df2,
                                                   int df3Ones,
                                                   int df3NegOnes,
                                                   java.security.SecureRandom random)

fromBinary

public static ProductFormPolynomial fromBinary(byte[] data,
                                               int N,
                                               int df1,
                                               int df2,
                                               int df3Ones,
                                               int df3NegOnes)
                                        throws java.io.IOException

Throws:: java.io.IOException

fromBinary

public static ProductFormPolynomial fromBinary(java.io.InputStream is,
                                               int N,
                                               int df1,
                                               int df2,
                                               int df3Ones,
                                               int df3NegOnes)
                                        throws java.io.IOException

Throws:: java.io.IOException

toBinary
```
public byte[] toBinary()
```

mult
```
public IntegerPolynomial mult(IntegerPolynomial b)
```
Description copied from interface: Polynomial

Multiplies the polynomial by an IntegerPolynomial, taking the indices mod N.

Specified by:

mult in interface Polynomial

Parameters:

b - a polynomial

Returns:

the product of the two polynomials

mult
```
public BigIntPolynomial mult(BigIntPolynomial b)
```
Description copied from interface: Polynomial

Multiplies the polynomial by a BigIntPolynomial, taking the indices mod N. Does not change this polynomial but returns the result as a new polynomial.
Both polynomials must have the same number of coefficients.

Specified by:

mult in interface Polynomial

Parameters:

b - the polynomial to multiply by

Returns:

a new polynomial

toIntegerPolynomial
```
public IntegerPolynomial toIntegerPolynomial()
```
Description copied from interface: Polynomial

Returns a polynomial that is equal to this polynomial (in the sense that Polynomial.mult(IntegerPolynomial, int) returns equal IntegerPolynomials). The new polynomial is guaranteed to be independent of the original.

Specified by:

toIntegerPolynomial in interface Polynomial

Returns:

a new IntegerPolynomial.

mult
```
public IntegerPolynomial mult(IntegerPolynomial poly2,
                              int modulus)
```
Description copied from interface: Polynomial

Multiplies the polynomial by an IntegerPolynomial, taking the coefficient values mod modulus and the indices mod N.

Specified by:

mult in interface Polynomial

Parameters:

poly2 - a polynomial

modulus - a modulus to apply

Returns:

the product of the two polynomials

hashCode
```
public int hashCode()
```
Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:: equals in class java.lang.Object

Class ProductFormPolynomial

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ProductFormPolynomial

Method Detail

generateRandom

fromBinary

fromBinary

toBinary

mult

mult

toIntegerPolynomial

mult

hashCode

equals