cryptix.security.rsa
Class SecretKey

java.lang.Object
  cryptix.security.rsa.PublicKey
      cryptix.security.rsa.SecretKey

Deprecated. This class may be removed in a future version of Cryptix.

public class SecretKey

extends PublicKey

This class represents an RSA secret key pair. It can also be used as a public key.

Copyright © 1995-1997 Systemics Ltd on behalf of the Cryptix Development Team.
All rights reserved.

$Revision: 1.4 $

Since:

Cryptix 2.2

Author:

Systemics Ltd, David Hopwood

See Also:

cryptix.provider.rsa.BaseRSAPrivateKey

Field Summary

protected BigInteger	d_ Deprecated. the private exponent
protected BigInteger	p_ Deprecated. one of the factors of n
protected BigInteger	q_ Deprecated. the other factor of n
protected BigInteger	u_ Deprecated. the multiplicative inverse of p mod q

Fields inherited from class cryptix.security.rsa.PublicKey

e_, n_

Constructor Summary

protected	SecretKey() Deprecated. A constructor that does no initialization, for use only by subclasses.
	SecretKey(BigInteger n, BigInteger e, BigInteger d, BigInteger p, BigInteger q, BigInteger u) Deprecated. Constructs a secret key pair from the component parts.

Method Summary

BigInteger	cryptFast(BigInteger exponent, BigInteger input) Deprecated. Performs a fast encryption/decryption, using the Chinese Remainder Theorem.
BigInteger	d() Deprecated. Returns the private exponent, d.
BigInteger	decrypt(BigInteger encrypted) Deprecated. Decrypts a number.
BigInteger	encrypt(BigInteger plain) Deprecated. Encrypts a number.
java.lang.String	insane() Deprecated. Performs a sanity check on the key.
BigInteger	p() Deprecated. Returns the smaller factor of n, p.
BigInteger	q() Deprecated. Returns the larger factor of n, q.
java.lang.String	test() Deprecated. Performs a basic test on the key.
java.lang.String	toString() Deprecated. Returns a string representation of all parts of the secret key.
BigInteger	u() Deprecated. Returns the multiplicative inverse of p mod q.

Methods inherited from class cryptix.security.rsa.PublicKey

bitLength, copy, e, equals, fingerPrint, id, n

Methods inherited from class java.lang.Object

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

Field Detail

d_

protected BigInteger d_

Deprecated.

the private exponent

p_

protected BigInteger p_

Deprecated.

one of the factors of n

q_

protected BigInteger q_

Deprecated.

the other factor of n

u_

protected BigInteger u_

Deprecated.

the multiplicative inverse of p mod q

Constructor Detail

SecretKey

protected SecretKey()

Deprecated.

A constructor that does no initialization, for use only by subclasses.

SecretKey

public SecretKey(BigInteger n,
                 BigInteger e,
                 BigInteger d,
                 BigInteger p,
                 BigInteger q,
                 BigInteger u)

Deprecated.

Constructs a secret key pair from the component parts.

Parameters:

n - the public modulus

e - the public (encryption) exponent

d - the private (decryption) exponent

p - the smaller factor of n

q - the larger factor of n

u - the multiplicative inverse of p mod q

Method Detail

d

public final BigInteger d()

Deprecated.

Returns the private exponent, d.

p

public final BigInteger p()

Deprecated.

Returns the smaller factor of n, p.

q

public final BigInteger q()

Deprecated.

Returns the larger factor of n, q.

u

public final BigInteger u()

Deprecated.

Returns the multiplicative inverse of p mod q.

decrypt

public BigInteger decrypt(BigInteger encrypted)

Deprecated.

Decrypts a number. This is used for decryption or signing.

Parameters:

encrypted - the number to decrypt.

Returns:

a decrypted number.

encrypt

public BigInteger encrypt(BigInteger plain)

Deprecated.

Encrypts a number. This is used for encryption or signature verification. N.B. this is quicker than the public key method, since secret components are available.

Overrides:

encrypt in class PublicKey

Parameters:

plain - the number to encrypt.

Returns:

an encrypted number.

cryptFast

public final BigInteger cryptFast(BigInteger exponent,
                                  BigInteger input)

Deprecated.

Performs a fast encryption/decryption, using the Chinese Remainder Theorem.

Parameters:

exponent - either e if encrypting or d if decrypting.

input - the value to encrypt or decrypt.

Returns:

the result of the operation.

insane

public final java.lang.String insane()

Deprecated.

Performs a sanity check on the key.

Returns:

null if the key is O.K., otherwise an error message.

test

public final java.lang.String test()

Deprecated.

Performs a basic test on the key.

Returns:

null if the key is O.K., otherwise an error message.

toString

public java.lang.String toString()

Deprecated.

Returns a string representation of all parts of the secret key. This method should be used with caution, in order that the secret key is not compromised.

Overrides:

toString in class PublicKey

Returns:

a string representation of the key.