Package com.icodici.crypto.rsaoaep.scrsa

Class NativeRSAEngine

java.lang.Object

org.bouncycastle.crypto.engines.RSAEngine

com.icodici.crypto.rsaoaep.scrsa.NativeRSAEngine

All Implemented Interfaces:

org.bouncycastle.crypto.AsymmetricBlockCipher

public final class NativeRSAEngine
extends org.bouncycastle.crypto.engines.RSAEngine
implements org.bouncycastle.crypto.AsymmetricBlockCipher

this does your basic RSA algorithm.

SQUARE: replacement for RSAEngine; this is much faster using jna-gmp.

Constructor Summary

Constructors

Constructor	Description
NativeRSAEngine()

Method Summary

Modifier and Type	Method	Description
int	getInputBlockSize()	Return the maximum size for an input block to this engine.
int	getOutputBlockSize()	Return the maximum size for an output block to this engine.
void	init(boolean forEncryption, org.bouncycastle.crypto.CipherParameters param)	initialise the RSA engine.
byte[]	processBlock(byte[] in, int inOff, int inLen)	Process a single block using the basic RSA algorithm.

Methods inherited from class java.lang.Object

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

Constructor Detail

NativeRSAEngine

public NativeRSAEngine()

Method Detail

init

public void init(boolean forEncryption,
                 org.bouncycastle.crypto.CipherParameters param)

initialise the RSA engine.

Specified by:

init in interface org.bouncycastle.crypto.AsymmetricBlockCipher

Overrides:

init in class org.bouncycastle.crypto.engines.RSAEngine

Parameters:

forEncryption - true if we are encrypting, false otherwise.

param - the necessary RSA key parameters.

getInputBlockSize

public int getInputBlockSize()

Return the maximum size for an input block to this engine. For RSA this is always one byte less than the key size on encryption, and the same length as the key size on decryption.

Specified by:

getInputBlockSize in interface org.bouncycastle.crypto.AsymmetricBlockCipher

Overrides:

getInputBlockSize in class org.bouncycastle.crypto.engines.RSAEngine

Returns:

maximum size for an input block.

getOutputBlockSize

public int getOutputBlockSize()

Return the maximum size for an output block to this engine. For RSA this is always one byte less than the key size on decryption, and the same length as the key size on encryption.

Specified by:

getOutputBlockSize in interface org.bouncycastle.crypto.AsymmetricBlockCipher

Overrides:

getOutputBlockSize in class org.bouncycastle.crypto.engines.RSAEngine

Returns:

maximum size for an output block.

processBlock

public byte[] processBlock(byte[] in,
                           int inOff,
                           int inLen)

Process a single block using the basic RSA algorithm.

Specified by:

processBlock in interface org.bouncycastle.crypto.AsymmetricBlockCipher

Overrides:

processBlock in class org.bouncycastle.crypto.engines.RSAEngine

Parameters:

in - the input array.

inOff - the offset into the input buffer where the data starts.

inLen - the length of the data to be processed.

Returns:

the result of the RSA process.

Throws:

org.bouncycastle.crypto.DataLengthException - the input block is too large.