org.bouncycastle.crypto.threshold

Class ShamirSplitSecret

java.lang.Object

org.bouncycastle.crypto.threshold.ShamirSplitSecret

All Implemented Interfaces:

SplitSecret

public class ShamirSplitSecret
extends java.lang.Object
implements SplitSecret

Constructor Summary

Constructors

Constructor and Description
ShamirSplitSecret(ShamirSecretSplitter.Algorithm algorithm, ShamirSecretSplitter.Mode mode, ShamirSplitSecretShare[] secretShares) Deprecated. the mode is ignored - see ShamirSecretSplitter.Mode. Use getInstance(ShamirSecretSplitter.Algorithm, ShamirSplitSecretShare[]).

Method Summary

Modifier and Type	Method and Description
ShamirSplitSecret	divide(int div)
static ShamirSplitSecret	getInstance(ShamirSecretSplitter.Algorithm algorithm, ShamirSplitSecretShare[] secretShares) Recombine a set of shares using constant-time GF(256) arithmetic.
byte[]	getSecret() Recombines secret shares to reconstruct the original secret.
ShamirSplitSecretShare[]	getSecretShares()
ShamirSplitSecret	multiple(int mul)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ShamirSplitSecret

@Deprecated
public ShamirSplitSecret(ShamirSecretSplitter.Algorithm algorithm,
                                     ShamirSecretSplitter.Mode mode,
                                     ShamirSplitSecretShare[] secretShares)

Deprecated. the mode is ignored - see ShamirSecretSplitter.Mode. Use getInstance(ShamirSecretSplitter.Algorithm, ShamirSplitSecretShare[]).

Method Detail

getInstance

public static ShamirSplitSecret getInstance(ShamirSecretSplitter.Algorithm algorithm,
                                            ShamirSplitSecretShare[] secretShares)

Recombine a set of shares using constant-time GF(256) arithmetic.

Parameters:

algorithm - the reduction polynomial the shares were produced over.

secretShares - the shares to recombine.

getSecretShares

public ShamirSplitSecretShare[] getSecretShares()

Specified by:

getSecretShares in interface SplitSecret

multiple

public ShamirSplitSecret multiple(int mul)
                           throws java.io.IOException

Throws:

java.io.IOException

divide

public ShamirSplitSecret divide(int div)
                         throws java.io.IOException

Throws:

java.io.IOException

getSecret

public byte[] getSecret()
                 throws java.io.IOException

Description copied from interface: SplitSecret

Recombines secret shares to reconstruct the original secret.

Specified by:

getSecret in interface SplitSecret

Returns:

A byte array containing the reconstructed secret.

Throws:

java.io.IOException