Modifier and Type	Class and Description
public static class	BigIntegers.Cache

Modifier and Type	Field and Description
private static final int	MAX_ITERATIONS
private static final int	MAX_SMALL
public static final BigInteger	ONE
private static final BigInteger	SMALL_PRIMES_PRODUCT
private static final BigInteger	THREE
public static final BigInteger	TWO
public static final BigInteger	ZERO

Access	Constructor and Description
public	BigIntegers()

Method Summary

Modifier and Type	Method and Description
public static byte[]	Returns: a byte array without a leading zero byte if present in the signed encoding. asUnsignedByteArray(BigInteger the value to be converted. value) Return the passed in value as an unsigned byte array.
public static byte[]	Returns: a byte array padded to a fixed length with leading zeros. asUnsignedByteArray(int the fixed length of the result length, BigInteger the value to be converted. value) Return the passed in value as an unsigned byte array of the specified length, padded with leading zeros as necessary..
public static void	asUnsignedByteArray(BigInteger the value to be converted. value, byte[] the buffer to which the value is written. buf, int the start offset in array `buf` at which the data is written. off, int the fixed length of data written (possibly padded with leading zeros). len) Write the passed in value as unsigned bytes to the specified buffer range, padded with leading zeros as necessary.
public static byte	byteValueExact(BigInteger x)
private static byte[]	createRandom(int bitLength, SecureRandom random)
public static BigInteger	Returns: a positive BigInteger createRandomBigInteger(int maximum bit length for the generated BigInteger. bitLength, SecureRandom a source of randomness. random) Return a positive BigInteger in the range of 0 to 2**bitLength - 1.
public static BigInteger	Returns: a random BigInteger value in the range [min,max] createRandomInRange(BigInteger the least value that may be generated min, BigInteger the greatest value that may be generated max, SecureRandom the source of randomness random) Return a random BigInteger not less than 'min' and not greater than 'max'
public static BigInteger	Returns: a positive BigInteger of numBits length createRandomPrime(int bit length for the generated BigInteger. bitLength, int certainty, SecureRandom a source of randomness. random) Return a prime number candidate of the specified bit length.
public static BigInteger	fromUnsignedByteArray(byte[] buf)
public static BigInteger	fromUnsignedByteArray(byte[] buf, int off, int length)
public static int	getUnsignedByteLength(BigInteger n)
public static int	intValueExact(BigInteger x)
public static long	longValueExact(BigInteger x)
public static BigInteger	modOddInverse(BigInteger M, BigInteger X)
public static BigInteger	modOddInverseVar(BigInteger M, BigInteger X)
public static boolean	modOddIsCoprime(BigInteger M, BigInteger X)
public static boolean	modOddIsCoprimeVar(BigInteger M, BigInteger X)
public static short	shortValueExact(BigInteger x)

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

Field Detail

MAX_ITERATIONS	back to summary
private static final int MAX_ITERATIONS

MAX_SMALL	back to summary
private static final int MAX_SMALL

ONE	back to summary
public static final BigInteger ONE

SMALL_PRIMES_PRODUCT	back to summary
private static final BigInteger SMALL_PRIMES_PRODUCT

THREE	back to summary
private static final BigInteger THREE

TWO	back to summary
public static final BigInteger TWO

ZERO	back to summary
public static final BigInteger ZERO

Constructor Detail

BigIntegers	back to summary
public BigIntegers()

Method Detail

asUnsignedByteArray	back to summary
public static byte[] asUnsignedByteArray(BigInteger value) Return the passed in value as an unsigned byte array. Parameters value:BigInteger the value to be converted. Returns:byte[] a byte array without a leading zero byte if present in the signed encoding.

asUnsignedByteArray

back to summary

public static byte[] asUnsignedByteArray(BigInteger value)

Return the passed in value as an unsigned byte array.

Parameters

value:BigInteger: the value to be converted.

Returns:byte[]

a byte array without a leading zero byte if present in the signed encoding.

asUnsignedByteArray	back to summary
public static byte[] asUnsignedByteArray(int length, BigInteger value) Return the passed in value as an unsigned byte array of the specified length, padded with leading zeros as necessary.. Parameters length:int the fixed length of the result value:BigInteger the value to be converted. Returns:byte[] a byte array padded to a fixed length with leading zeros.

asUnsignedByteArray

back to summary

public static byte[] asUnsignedByteArray(int length, BigInteger value)

Return the passed in value as an unsigned byte array of the specified length, padded with leading zeros as necessary..

Parameters

length:int: the fixed length of the result
value:BigInteger: the value to be converted.

Returns:byte[]

a byte array padded to a fixed length with leading zeros.

asUnsignedByteArray back to summary

asUnsignedByteArray	back to summary
public static void asUnsignedByteArray(BigInteger value, byte[] buf, int off, int len) Write the passed in value as unsigned bytes to the specified buffer range, padded with leading zeros as necessary. Parameters value:BigInteger the value to be converted. buf:byte[] the buffer to which the value is written. off:int the start offset in array `buf` at which the data is written. len:int the fixed length of data written (possibly padded with leading zeros).

public static void asUnsignedByteArray(BigInteger value, byte[] buf, int off, int len)

Write the passed in value as unsigned bytes to the specified buffer range, padded with leading zeros as necessary.

Parameters

value:BigInteger: the value to be converted.
buf:byte[]: the buffer to which the value is written.
off:int: the start offset in array buf at which the data is written.
len:int: the fixed length of data written (possibly padded with leading zeros).

byteValueExact	back to summary
public static byte byteValueExact(BigInteger x)

createRandom	back to summary
private static byte[] createRandom(int bitLength, SecureRandom random) throws IllegalArgumentException

createRandomBigInteger	back to summary
public static BigInteger createRandomBigInteger(int bitLength, SecureRandom random) Return a positive BigInteger in the range of 0 to 2**bitLength - 1. Parameters bitLength:int maximum bit length for the generated BigInteger. random:SecureRandom a source of randomness. Returns:BigInteger a positive BigInteger

createRandomBigInteger

back to summary

public static BigInteger createRandomBigInteger(int bitLength, SecureRandom random)

Return a positive BigInteger in the range of 0 to 2**bitLength - 1.

Parameters

bitLength:int: maximum bit length for the generated BigInteger.
random:SecureRandom: a source of randomness.

Returns:BigInteger

a positive BigInteger

createRandomInRange	back to summary
public static BigInteger createRandomInRange(BigInteger min, BigInteger max, SecureRandom random) Return a random BigInteger not less than 'min' and not greater than 'max' Parameters min:BigInteger the least value that may be generated max:BigInteger the greatest value that may be generated random:SecureRandom the source of randomness Returns:BigInteger a random BigInteger value in the range [min,max]

createRandomInRange

back to summary

public static BigInteger createRandomInRange(BigInteger min, BigInteger max, SecureRandom random)

Return a random BigInteger not less than 'min' and not greater than 'max'

Parameters

min:BigInteger: the least value that may be generated
max:BigInteger: the greatest value that may be generated
random:SecureRandom: the source of randomness

Returns:BigInteger

a random BigInteger value in the range [min,max]

createRandomPrime	back to summary
public static BigInteger createRandomPrime(int bitLength, int certainty, SecureRandom random) Return a prime number candidate of the specified bit length. Parameters bitLength:int bit length for the generated BigInteger. random:SecureRandom a source of randomness. Returns:BigInteger a positive BigInteger of numBits length

createRandomPrime

back to summary

public static BigInteger createRandomPrime(int bitLength, int certainty, SecureRandom random)

Return a prime number candidate of the specified bit length.

Parameters

bitLength:int: bit length for the generated BigInteger.
random:SecureRandom: a source of randomness.

Returns:BigInteger

a positive BigInteger of numBits length

fromUnsignedByteArray	back to summary
public static BigInteger fromUnsignedByteArray(byte[] buf)

fromUnsignedByteArray	back to summary
public static BigInteger fromUnsignedByteArray(byte[] buf, int off, int length)

getUnsignedByteLength	back to summary
public static int getUnsignedByteLength(BigInteger n)

intValueExact	back to summary
public static int intValueExact(BigInteger x)

longValueExact	back to summary
public static long longValueExact(BigInteger x)

modOddInverse	back to summary
public static BigInteger modOddInverse(BigInteger M, BigInteger X)

modOddInverseVar	back to summary
public static BigInteger modOddInverseVar(BigInteger M, BigInteger X)

modOddIsCoprime	back to summary
public static boolean modOddIsCoprime(BigInteger M, BigInteger X)

modOddIsCoprimeVar	back to summary
public static boolean modOddIsCoprimeVar(BigInteger M, BigInteger X)

shortValueExact	back to summary
public static short shortValueExact(BigInteger x)

org.bouncycastle.util back to summary

public Class BigIntegers.Cache

Class Inheritance

extends Object

java.lang.Object
org.bouncycastle.util.BigIntegers.Cache

Field Summary

Modifier and Type	Field and Description
private final BigInteger[]	preserve
private int	preserveCounter
private final Map<BigInteger, Boolean>	values

Constructor Summary

Access	Constructor and Description
public	Cache()

Method Summary

Modifier and Type	Method and Description
public synchronized void	add(BigInteger value)
public synchronized void	clear()
public synchronized boolean	contains(BigInteger value)
public synchronized int	size()

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

Field Detail

preserve	back to summary
private final BigInteger[] preserve

preserveCounter	back to summary
private int preserveCounter

values	back to summary
private final Map<BigInteger, Boolean> values

Constructor Detail

Cache	back to summary
public Cache()

Method Detail

add	back to summary
public synchronized void add(BigInteger value)

clear	back to summary
public synchronized void clear()

contains	back to summary
public synchronized boolean contains(BigInteger value)

size	back to summary
public synchronized int size()

public final Class BigIntegers

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

public Class BigIntegers.Cache

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail