org.bouncycastle.crypto.asymmetric

Class AsymmetricRSAKey

java.lang.Object

org.bouncycastle.crypto.asymmetric.AsymmetricRSAKey

All Implemented Interfaces:

AsymmetricKey, Key

Direct Known Subclasses:

AsymmetricRSAPrivateKey, AsymmetricRSAPublicKey

public abstract class AsymmetricRSAKey
extends java.lang.Object
implements AsymmetricKey

Base class for RSA keys.

Note: the module attempts to prevent accidental recent use of RSA keys for signing and encryption purposes by associating a specific usage with a modulus. If the module is not running in approved mode this behavior can be overridden by setting the system property "org.bouncycastle.rsa.allow_multi_use" to "true".

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AsymmetricRSAKey.Usage Specific RSA key usages.

Field Summary

Fields

Modifier and Type	Field and Description
protected static AlgorithmIdentifier	DEF_ALG_ID
protected java.math.BigInteger	modulus
protected static AlgorithmIdentifier	PSS_ALG_ID
protected AlgorithmIdentifier	rsaAlgIdentifier

Method Summary

Modifier and Type	Method and Description
boolean	canBeUsed(AsymmetricRSAKey.Usage usage) Check to see if a key can be used for a specific usage.
protected void	checkApprovedOnlyModeStatus()
Algorithm	getAlgorithm() Return the algorithm this RSA key is for.
java.math.BigInteger	getModulus() Return the modulus for this RSA key.
protected boolean	isThreadCorrectMode()
protected void	zeroize()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.bouncycastle.crypto.AsymmetricKey

getEncoded

Methods inherited from interface org.bouncycastle.crypto.Key

equals, hashCode

Field Detail

DEF_ALG_ID

protected static final AlgorithmIdentifier DEF_ALG_ID

PSS_ALG_ID

protected static final AlgorithmIdentifier PSS_ALG_ID

modulus

protected java.math.BigInteger modulus

rsaAlgIdentifier

protected final AlgorithmIdentifier rsaAlgIdentifier

Method Detail

getAlgorithm

public Algorithm getAlgorithm()

Return the algorithm this RSA key is for.

Specified by:

getAlgorithm in interface Key

Returns:

the key's algorithm.

getModulus

public java.math.BigInteger getModulus()

Return the modulus for this RSA key.

Returns:

the key's modulus.

canBeUsed

public boolean canBeUsed(AsymmetricRSAKey.Usage usage)

Check to see if a key can be used for a specific usage. Essentially this will return false if the modulus is associated with a different usage already. The system property "org.bouncycastle.rsa.allow_multi_use" can be set to "true" to override this check.

Parameters:

usage - usage for the RSA key.

Returns:

true if the modulus is already associated with the usage, or has not being used already.

zeroize

protected void zeroize()

isThreadCorrectMode

protected final boolean isThreadCorrectMode()

checkApprovedOnlyModeStatus

protected final void checkApprovedOnlyModeStatus()