Bouncy Castle Provider 1.77 · org.bouncycastle.pqc.legacy.math.ntru.util.Util

Modifier and Type	Field and Description
private static volatile boolean	IS_64_BIT_JVM
private static volatile boolean	IS_64_BITNESS_KNOWN

Access	Constructor and Description
public	Util()

Method Summary

Modifier and Type	Method and Description
public static TernaryPolynomial	Returns: a ternary polynomial generateRandomTernary(int N, int numOnes, int numNegOnes, boolean whether to create a `SparseTernaryPolynomial` or `DenseTernaryPolynomial` sparse, SecureRandom random) Generates a "sparse" or "dense" polynomial containing numOnes ints equal to 1, numNegOnes int equal to -1, and the rest equal to 0.
public static int[]	Returns: an array of integers generateRandomTernary(int N, int numOnes, int numNegOnes, SecureRandom random) Generates an array containing numOnes ints equal to 1, numNegOnes int equal to -1, and the rest equal to 0.
public static int	invert(int n, int modulus) Calculates the inverse of n mod modulus
public static boolean	Returns: `true` if 64-bit support detected, `false` otherwise is64BitJVM() Takes an educated guess as to whether 64 bits are supported by the JVM.
public static int	pow(int a, int b, int modulus) Calculates a^b mod modulus
public static long	pow(long a, int b, long modulus) Calculates a^b mod modulus
public static byte[]	Returns: an array of length `length` readFullLength(InputStream is, int length) Reads a given number of bytes from an `InputStream`.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

IS_64_BIT_JVM	back to summary
private static volatile boolean IS_64_BIT_JVM

IS_64_BITNESS_KNOWN	back to summary
private static volatile boolean IS_64_BITNESS_KNOWN

Util	back to summary
public Util()

generateRandomTernary back to summary

generateRandomTernary	back to summary
public static TernaryPolynomial generateRandomTernary(int N, int numOnes, int numNegOnes, boolean sparse, SecureRandom random) Generates a "sparse" or "dense" polynomial containing numOnes ints equal to 1, numNegOnes int equal to -1, and the rest equal to 0. Parameters sparse:boolean whether to create a `SparseTernaryPolynomial` or `DenseTernaryPolynomial` Returns:TernaryPolynomial a ternary polynomial

public static TernaryPolynomial generateRandomTernary(int N, int numOnes, int numNegOnes, boolean sparse, SecureRandom random)

Generates a "sparse" or "dense" polynomial containing numOnes ints equal to 1, numNegOnes int equal to -1, and the rest equal to 0.

Parameters

sparse:boolean: whether to create a SparseTernaryPolynomial or DenseTernaryPolynomial

a ternary polynomial

generateRandomTernary	back to summary
public static int[] generateRandomTernary(int N, int numOnes, int numNegOnes, SecureRandom random) Generates an array containing numOnes ints equal to 1, numNegOnes int equal to -1, and the rest equal to 0. Returns:int[] an array of integers

generateRandomTernary

public static int[] generateRandomTernary(int N, int numOnes, int numNegOnes, SecureRandom random)

Generates an array containing numOnes ints equal to 1, numNegOnes int equal to -1, and the rest equal to 0.

invert	back to summary
public static int invert(int n, int modulus) Calculates the inverse of n mod modulus

is64BitJVM back to summary

is64BitJVM	back to summary
public static boolean is64BitJVM() Takes an educated guess as to whether 64 bits are supported by the JVM. Returns:boolean `true` if 64-bit support detected, `false` otherwise

public static boolean is64BitJVM()

Takes an educated guess as to whether 64 bits are supported by the JVM.

pow	back to summary
public static int pow(int a, int b, int modulus) Calculates a^b mod modulus

pow	back to summary
public static long pow(long a, int b, long modulus) Calculates a^b mod modulus

readFullLength back to summary

readFullLength	back to summary
public static byte[] readFullLength(InputStream is, int length) throws IOException Reads a given number of bytes from an `InputStream`. If there are not enough bytes in the stream, an `IOException` is thrown. Returns:byte[] an array of length `length`

public static byte[] readFullLength(InputStream is, int length) throws IOException

Reads a given number of bytes from an InputStream. If there are not enough bytes in the stream, an IOException is thrown.