COM.claymoresystems.provider
Class RSASignature

java.lang.Object
  java.security.SignatureSpi
      java.security.Signature
          COM.claymoresystems.provider.RSASignature

All Implemented Interfaces:

Blindable

public class RSASignature

extends java.security.Signature

implements Blindable

This class implements RSA signature w/ PKCS#1 padding but no DigestInfo encoding because Cryptix doesn't and SSL requires it for Client Auth.

We assume that we already have an RSAEncryption primitive floating around.

Field Summary

Fields inherited from class java.security.Signature

SIGN, state, UNINITIALIZED, VERIFY

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

RSASignature()

Method Summary

protected java.lang.Object	engineGetParameter(java.lang.String param) SPI: There aren't any parameters
protected void	engineInitSign(java.security.PrivateKey key) SPI: Initializes this object for signing using the private key
protected void	engineInitVerify(java.security.PublicKey key) SPI: Initializes this object for verification using the given key
protected void	engineSetParameter(java.lang.String param, java.lang.Object value) SPI: There aren't any parameters
protected byte[]	engineSign() SPI: Sign the input
protected void	engineUpdate(byte b) SPI: Single byte updates are forbidden
protected void	engineUpdate(byte[] b, int off, int len) SPI: Updates the data.
protected boolean	engineVerify(byte[] signature) SPI: Verify the input
void	setBlindingInfo(java.security.SecureRandom rng, CryptixRSAPublicKey pubKey) set the RNG for blinding
protected byte[]	sigToBytes(java.math.BigInteger num)

Methods inherited from class java.security.Signature

clone, getAlgorithm, getInstance, getInstance, getInstance, getParameter, getParameters, getProvider, initSign, initSign, initVerify, initVerify, setParameter, setParameter, sign, sign, toString, update, update, update, verify, verify

Methods inherited from class java.security.SignatureSpi

engineGetParameters, engineInitSign, engineSetParameter, engineSign, engineVerify

Methods inherited from class java.lang.Object

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

Constructor Detail

RSASignature

public RSASignature()

Method Detail

engineInitVerify

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

SPI: Initializes this object for verification using the given key

Parameters:

key - the public key

Throws:

java.security.InvalidKeyException - if the key class doesn't implement CryptixRSAPublicKey

engineInitSign

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

SPI: Initializes this object for signing using the private key

Parameters:

key - the private key

Throws:

java.security.InvalidKeyException - if the key class doesn't implement than CryptixRSAPrivateKey

engineUpdate

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

SPI: Single byte updates are forbidden

Throws:

java.security.SignatureException - if you do a single byte update

engineUpdate

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

SPI: Updates the data. This can only be called once with a single data value or we throw an error

Parameters:

b - the buffer containing the data

off - the offset into the buffer

len - the length

Throws:

java.security.SignatureException - either if the algorithm was improperly initialized or you try to call update more than once

engineSign

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

SPI: Sign the input

Returns:

a signature as a byte string

Throws:

java.security.SignatureException - bad input

engineVerify

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

SPI: Verify the input

Returns:

true or false

Throws:

java.security.SignatureException - bad input

setBlindingInfo

public void setBlindingInfo(java.security.SecureRandom rng,
                            CryptixRSAPublicKey pubKey)

set the RNG for blinding

Specified by:

setBlindingInfo in interface Blindable

Parameters:

rng - a secure RNG

engineSetParameter

protected void engineSetParameter(java.lang.String param,
                                  java.lang.Object value)
                           throws java.security.InvalidParameterException

SPI: There aren't any parameters

Throws:

java.security.InvalidParameterException

engineGetParameter

protected java.lang.Object engineGetParameter(java.lang.String param)
                                       throws java.security.InvalidParameterException

SPI: There aren't any parameters

Throws:

java.security.InvalidParameterException

sigToBytes

protected byte[] sigToBytes(java.math.BigInteger num)