Module ibm.crypto.hdwrcca

Package com.ibm.crypto.hdwrCCA.provider

Class DatawithRSA

java.lang.Object

java.security.SignatureSpi

com.ibm.crypto.hdwrCCA.provider.DatawithRSA

public final class DatawithRSA
extends SignatureSpi

This class is a concrete RSA signing with data implementation of the Service Provider Interface (SPI) for the Signature class, which is used to provide the functionality of a digital signature algorithm.

This documentation is provided for implementation insight only. This class is not intended to be called directly by application developers. Please consult the 'Java Cryptography Architecture Standard' for details on how to use this interface through a public standard class.

Field Summary

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

Constructors

Constructor	Description
DatawithRSA()	Construct a blank RSA signature object.

Method Summary

Modifier and Type	Method	Description
protected Object	engineGetParameter(String key)	Deprecated.
protected void	engineInitSign(PrivateKey privateKey)	Initializes this signature object with the specified private key for signing operations.
protected void	engineInitVerify(PublicKey publicKey)	Initializes this signature object with the specified public key for verification operations.
protected void	engineSetParameter(String key, Object param)	Deprecated.
protected byte[]	engineSign()	Returns the signature bytes of all the data updated so far.
protected void	engineUpdate(byte b)	Updates the data to be signed or verified using the specified byte.
protected void	engineUpdate(byte[] buff, int off, int len)	Updates the data to be signed or verified, using the specified array of bytes, starting at the specified offset.
protected boolean	engineVerify(byte[] signature)	Verifies the passed-in signature.

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 Details

DatawithRSA

public DatawithRSA()
            throws NoSuchAlgorithmException,
NoSuchProviderException

Construct a blank RSA signature object. This object must be initialized before being used for signing or verifying.

Throws:

NoSuchAlgorithmException

NoSuchProviderException

Method Details

engineSetParameter

@Deprecated
protected void engineSetParameter(String key,
 Object param)
                           throws UnsupportedOperationException

Deprecated.

Sets the specified algorithm parameter to the specified value. Please note that this method has no meaning for this provider and has been deprecated.

Specified by:

engineSetParameter in class SignatureSpi

Parameters:

key - the string identifier of the parameter

param - the parameter value

Throws:

UnsupportedOperationException - is always thrown.

engineGetParameter

@Deprecated
protected Object engineGetParameter(String key)
                             throws UnsupportedOperationException

Deprecated.

Gets the value of the specified algorithm parameter. Please note that this method has no meaning for this provider, and has been deprecated.

Specified by:

engineGetParameter in class SignatureSpi

Parameters:

key - the string name of the parameter

Throws:

UnsupportedOperationException - is always thrown.

engineInitSign

protected void engineInitSign(PrivateKey privateKey)
                       throws InvalidKeyException

Initializes this signature object with the specified private key for signing operations.

Specified by:

engineInitSign in class SignatureSpi

Parameters:

privateKey - the private key of the identity whose signature will be generated

Throws:

InvalidKeyException - if the specified key is not a valid RSA private key (improperly encoded, parameters missing, etc).

engineInitVerify

protected void engineInitVerify(PublicKey publicKey)
                         throws InvalidKeyException

Initializes this signature object with the specified public key for verification operations.

Specified by:

engineInitVerify in class SignatureSpi

Parameters:

publicKey - the public key of the identity whose signature is going to be verified

Throws:

InvalidKeyException - if the specified key is not a valid RSA public key (improperly encoded, parameters missing, etc).

engineUpdate

protected void engineUpdate(byte b)
                     throws SignatureException

Updates the data to be signed or verified using the specified byte.

Specified by:

engineUpdate in class SignatureSpi

Parameters:

b - the byte to use for the update

Throws:

SignatureException

engineUpdate

protected void engineUpdate(byte[] buff,
 int off,
 int len)
                     throws SignatureException

Updates the data to be signed or verified, using the specified array of bytes, starting at the specified offset.

Specified by:

engineUpdate in class SignatureSpi

Parameters:

buff - the array of bytes

off - the offset to start from in the array of bytes

len - the number of bytes to use, starting at offset

Throws:

SignatureException

engineSign

protected byte[] engineSign()
                     throws SignatureException

Returns the signature bytes of all the data updated so far.

Specified by:

engineSign in class SignatureSpi

Returns:

the signature bytes of the signing operation's result.

Throws:

SignatureException - if the engine is not initialized properly or if this signature algorithm is unable to process the input data provided.

engineVerify

protected boolean engineVerify(byte[] signature)
                        throws SignatureException

Verifies the passed-in signature.

Specified by:

engineVerify in class SignatureSpi

Parameters:

signature - the signature bytes to be verified

Returns:

true if the signature was verified, false if not.

Throws:

SignatureException - if the engine is not initialized properly, the passed-in signature is improperly encoded or of the wrong type, if this signature algorithm is unable to process the input data provided, etc.