Bouncy Castle Provider 1.77 · org.bouncycastle.pqc.legacy.math.linearalgebra.BigIntUtils

Access	Constructor and Description
private	BigIntUtils() Default constructor (private).

Method Summary

Modifier and Type	Method and Description
public static boolean	Returns: true or false equals(BigInteger[] first BigInteger array a, BigInteger[] second BigInteger array b) Checks if two BigInteger arrays contain the same entries
public static void	fill(BigInteger[] the array array, BigInteger the value value) Fill the given BigInteger array with the given value.
public static BigInteger[]	Returns: a subarray of `input`, ranging from `start` to `end` subArray(BigInteger[] - the input BigInteger array input, int - the start index start, int - the end index end) Generates a subarray of a given BigInteger array.
public static int[]	Returns: the integer array toIntArray(BigInteger[] - the BigInteger array input) Converts a BigInteger array into an integer array
public static int[]	Returns: the integer array toIntArrayModQ(int - the modulus q, BigInteger[] - the BigInteger array input) Converts a BigInteger array into an integer array, reducing all BigIntegers mod q.
public static byte[]	Returns: the value `big` as byte array toMinimalByteArray(BigInteger the `BigInteger` value to be converted to a byte array value) Return the value of `big` as a byte array.

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

BigIntUtils	back to summary
private BigIntUtils() Default constructor (private).

Method Detail

equals	back to summary
public static boolean equals(BigInteger[] a, BigInteger[] b) Checks if two BigInteger arrays contain the same entries Parameters a:BigInteger[] first BigInteger array b:BigInteger[] second BigInteger array Returns:boolean true or false

equals

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public static boolean equals(BigInteger[] a, BigInteger[] b)

Checks if two BigInteger arrays contain the same entries

Parameters

a:BigInteger[]: first BigInteger array
b:BigInteger[]: second BigInteger array

Returns:boolean

true or false

fill	back to summary
public static void fill(BigInteger[] array, BigInteger value) Fill the given BigInteger array with the given value. Parameters array:BigInteger[] the array value:BigInteger the value

fill

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public static void fill(BigInteger[] array, BigInteger value)

Fill the given BigInteger array with the given value.

Parameters

array:BigInteger[]: the array
value:BigInteger: the value

subArray back to summary

subArray	back to summary
public static BigInteger[] subArray(BigInteger[] input, int start, int end) Generates a subarray of a given BigInteger array. Parameters input:BigInteger[] - the input BigInteger array start:int - the start index end:int - the end index Returns:BigInteger[] a subarray of `input`, ranging from `start` to `end`

public static BigInteger[] subArray(BigInteger[] input, int start, int end)

Generates a subarray of a given BigInteger array.

Parameters

input:BigInteger[]: - the input BigInteger array
start:int: - the start index
end:int: - the end index

Returns:BigInteger[]

a subarray of input, ranging from start to end

toIntArray	back to summary
public static int[] toIntArray(BigInteger[] input) Converts a BigInteger array into an integer array Parameters input:BigInteger[] - the BigInteger array Returns:int[] the integer array

toIntArray

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public static int[] toIntArray(BigInteger[] input)

Converts a BigInteger array into an integer array

Parameters

input:BigInteger[]: - the BigInteger array

Returns:int[]

the integer array

toIntArrayModQ	back to summary
public static int[] toIntArrayModQ(int q, BigInteger[] input) Converts a BigInteger array into an integer array, reducing all BigIntegers mod q. Parameters q:int - the modulus input:BigInteger[] - the BigInteger array Returns:int[] the integer array

toIntArrayModQ

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public static int[] toIntArrayModQ(int q, BigInteger[] input)

Converts a BigInteger array into an integer array, reducing all BigIntegers mod q.

Parameters

q:int: - the modulus
input:BigInteger[]: - the BigInteger array

Returns:int[]

the integer array

toMinimalByteArray back to summary

toMinimalByteArray	back to summary
public static byte[] toMinimalByteArray(BigInteger value) Return the value of `big` as a byte array. Although BigInteger has such a method, it uses an extra bit to indicate the sign of the number. For elliptic curve cryptography, the numbers usually are positive. Thus, this helper method returns a byte array of minimal length, ignoring the sign of the number. Parameters value:BigInteger the `BigInteger` value to be converted to a byte array Returns:byte[] the value `big` as byte array

public static byte[] toMinimalByteArray(BigInteger value)

Return the value of big as a byte array. Although BigInteger has such a method, it uses an extra bit to indicate the sign of the number. For elliptic curve cryptography, the numbers usually are positive. Thus, this helper method returns a byte array of minimal length, ignoring the sign of the number.

Parameters

value:BigInteger: the BigInteger value to be converted to a byte array

Returns:byte[]

the value big as byte array

public final Class BigIntUtils

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