gnu.crypto.sig.rsa

Class RSAPKCS1V1_5Signature

java.lang.Object

gnu.crypto.sig.BaseSignature

gnu.crypto.sig.rsa.RSAPKCS1V1_5Signature

All Implemented Interfaces:

ISignature, java.lang.Cloneable

public class RSAPKCS1V1_5Signature
extends BaseSignature

The RSA-PKCS1-V1.5 signature scheme is a digital signature scheme with appendix (SSA) combining the RSA algorithm with the EMSA-PKCS1-v1_5 encoding method.

References:

1. RSA-PSS Signature Scheme with Appendix, part B.
   Primitive specification and supporting documentation.
   Jakob Jonsson and Burt Kaliski.
2. Public-Key Cryptography Standards (PKCS) #1:
   RSA Cryptography Specifications Version 2.1.
   Jakob Jonsson and Burt Kaliski.

Version:

$Revision: 1.1 $

Field Summary

Fields inherited from class gnu.crypto.sig.BaseSignature

md, privateKey, publicKey, schemeName

Fields inherited from interface gnu.crypto.sig.ISignature

SIGNER_KEY, SOURCE_OF_RANDOMNESS, VERIFIER_KEY

Constructor Summary

Constructors

Constructor and Description
RSAPKCS1V1_5Signature() Default 0-arguments constructor.
RSAPKCS1V1_5Signature(java.lang.String mdName) Constructs an instance of this object using the designated message digest algorithm as its underlying hash function.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone() Returns a clone copy of this instance.
protected java.lang.Object	generateSignature()
protected void	setupForSigning(java.security.PrivateKey k)
protected void	setupForVerification(java.security.PublicKey k)
protected boolean	verifySignature(java.lang.Object sig)

Methods inherited from class gnu.crypto.sig.BaseSignature

clearData, clearData, init, name, nextRandomBytes, setupSign, setupVerify, sign, update, update, verify

Methods inherited from class java.lang.Object

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

Constructor Detail

RSAPKCS1V1_5Signature

public RSAPKCS1V1_5Signature()

Default 0-arguments constructor. Uses SHA-1 as the default hash.

RSAPKCS1V1_5Signature

public RSAPKCS1V1_5Signature(java.lang.String mdName)

Constructs an instance of this object using the designated message digest algorithm as its underlying hash function.

Parameters:

mdName - the canonical name of the underlying hash function.

Method Detail

clone

public java.lang.Object clone()

Description copied from interface: ISignature

Returns a clone copy of this instance.

Specified by:

clone in interface ISignature

Specified by:

clone in class BaseSignature

Returns:

a clone copy of this instance.

setupForVerification

protected void setupForVerification(java.security.PublicKey k)
                             throws java.lang.IllegalArgumentException

Specified by:

setupForVerification in class BaseSignature

Throws:

java.lang.IllegalArgumentException

setupForSigning

protected void setupForSigning(java.security.PrivateKey k)
                        throws java.lang.IllegalArgumentException

Specified by:

setupForSigning in class BaseSignature

Throws:

java.lang.IllegalArgumentException

generateSignature

protected java.lang.Object generateSignature()
                                      throws java.lang.IllegalStateException

Specified by:

generateSignature in class BaseSignature

Throws:

java.lang.IllegalStateException

verifySignature

protected boolean verifySignature(java.lang.Object sig)
                           throws java.lang.IllegalStateException

Specified by:

verifySignature in class BaseSignature

Throws:

java.lang.IllegalStateException