com.ibm.crypto.hdwrCCA.provider

Class SHA2withRSA

java.lang.Object

java.security.SignatureSpi

com.ibm.crypto.hdwrCCA.provider.SHA2withRSA

public final class SHA2withRSA
extends java.security.SignatureSpi

This class is a concrete implementation for RSA signing with SHA2.

Field Summary

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

Constructors

Constructor and Description
SHA2withRSA() Construct a blank RSA object.

Method Summary

Modifier and Type	Method and Description
protected java.lang.Object	engineGetParameter(java.lang.String key) Deprecated.
protected void	engineInitSign(java.security.PrivateKey privateKey) Initialize this signature object with a RSA private key.
protected void	engineInitVerify(java.security.PublicKey publicKey) Initialize the RSA object with a RSA public key.
protected void	engineSetParameter(java.lang.String key, java.lang.Object param) Deprecated.
protected byte[]	engineSign() Get message digest for all the data thus far updated, then sign the message digest.
protected void	engineUpdate(byte b) Add a byte to the digest to be signed or verified.
protected void	engineUpdate(byte[] data, int off, int len) Add an array of bytes to the digest to be signed or verified.
protected boolean	engineVerify(byte[] signature) Verify the signature (compare the result with the message digest).

Methods inherited from class java.security.SignatureSpi

clone, engineGetParameters, engineInitSign, engineSetParameter, engineSign, engineUpdate, engineVerify

Methods inherited from class java.lang.Object

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

Constructor Detail

SHA2withRSA

public SHA2withRSA()
            throws java.security.NoSuchAlgorithmException,
                   java.security.NoSuchProviderException

Construct a blank RSA object. It must be initialized before being usable for signing or verifying.

Throws:

java.security.NoSuchAlgorithmException - is thrown when if the Algorithm can not be found.

java.security.NoSuchProviderException - is thrown the provider can not be found.

Method Detail

engineSetParameter

protected void engineSetParameter(java.lang.String key,
                                  java.lang.Object param)
                           throws java.lang.UnsupportedOperationException

Deprecated.

Have to implement Signature's abstract method engineSetParameter to be a concrete class. However, this method has no meaning for this provider.

Specified by:

engineSetParameter in class java.security.SignatureSpi

Throws:

java.lang.UnsupportedOperationException - is always thrown.

engineGetParameter

protected java.lang.Object engineGetParameter(java.lang.String key)
                                       throws java.lang.UnsupportedOperationException

Deprecated.

Have to implement Signature's abstract method engineGetParameter to be a concrete class. However, this method has no meaning for this provider.

Specified by:

engineGetParameter in class java.security.SignatureSpi

Throws:

java.lang.UnsupportedOperationException - is always thrown.

engineInitSign

protected void engineInitSign(java.security.PrivateKey privateKey)
                       throws java.security.InvalidKeyException

Initialize this signature object with a RSA private key.

Specified by:

engineInitSign in class java.security.SignatureSpi

Parameters:

privateKey - the RSA private key

Throws:

java.security.InvalidKeyException - if privateKey is not a valid RSA private key.

engineInitVerify

protected void engineInitVerify(java.security.PublicKey publicKey)
                         throws java.security.InvalidKeyException

Initialize the RSA object with a RSA public key.

Specified by:

engineInitVerify in class java.security.SignatureSpi

Parameters:

publicKey - the RSA public key.

Throws:

java.security.InvalidKeyException - if the key is not a valid RSA public key.

engineUpdate

protected void engineUpdate(byte b)
                     throws java.security.SignatureException

Add a byte to the digest to be signed or verified.

Specified by:

engineUpdate in class java.security.SignatureSpi

Parameters:

b - the byte to updated.

Throws:

java.security.SignatureException

engineUpdate

protected void engineUpdate(byte[] data,
                            int off,
                            int len)
                     throws java.security.SignatureException

Add an array of bytes to the digest to be signed or verified.

Specified by:

engineUpdate in class java.security.SignatureSpi

Parameters:

data - the array bytes to be added to the digest.

off - the offset into the array to start the update.

len - length of the array.

Throws:

java.security.SignatureException

engineSign

protected byte[] engineSign()
                     throws java.security.SignatureException

Get message digest for all the data thus far updated, then sign the message digest.

Specified by:

engineSign in class java.security.SignatureSpi

Returns:

the signature.

Throws:

java.security.SignatureException - if the signature object was not properly initialized, or if another exception occurs.

engineVerify

protected boolean engineVerify(byte[] signature)
                        throws java.security.SignatureException

Verify the signature (compare the result with the message digest).

Specified by:

engineVerify in class java.security.SignatureSpi

Parameters:

signature - the signature to be verified.

Throws:

java.security.SignatureException - if the signature object was not properly initialized, or if another exception occurs.