cryptix.provider.rsa

Class RawRSAPrivateKey

java.lang.Object

cryptix.provider.rsa.BaseRSAPrivateKey

cryptix.provider.rsa.RawRSAPrivateKey

All Implemented Interfaces:

java.io.Serializable, java.security.Key, java.security.PrivateKey, javax.security.auth.Destroyable, CryptixRSAPrivateKey, RSAFactors, RSAKey

public class RawRSAPrivateKey
extends BaseRSAPrivateKey

A class representing a RAW-encoded RSA private key.

The encoding consists of the following, in order:

1. the private exponent d,
2. the first factor of the modulus, p,
3. the second factor of the modulus, q,
4. the coefficient q^-1 mod p.

Each integer is represented as follows:

    Byte    Length
    offset  (bytes)   Meaning
    0       2         The length in bits of this BigInteger (MSB first);
    2       variable  The BigInteger's magnitude with no leading zeroes,
                      again MSB first.
 

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

$Revision: 1.7 $

Since:

Cryptix 2.2.2

Author:

Raif S. Naffah, David Hopwood

See Also:

Serialized Form

Field Summary

Fields inherited from interface java.security.PrivateKey

serialVersionUID

Constructor Summary

Constructors

Constructor and Description
RawRSAPrivateKey(java.math.BigInteger n, java.math.BigInteger d) Constructs a raw RSA private key given the private exponent, and the public modulus n.
RawRSAPrivateKey(java.math.BigInteger d, java.math.BigInteger p, java.math.BigInteger q) Constructs a raw RSA private key given the private exponent, and the two factors used to generate the public modulus n.
RawRSAPrivateKey(java.math.BigInteger d, java.math.BigInteger p, java.math.BigInteger q, java.math.BigInteger u) Constructs a raw RSA private key given the private exponent, and the two factors used to generate the public modulus n.
RawRSAPrivateKey(java.io.InputStream is) Constructs a raw RSA private key from data read from an InputStream, encoded as described above.

Method Summary

Modifier and Type	Method and Description
byte[]	getEncoded() Returns an encoding of the key as a byte array, as described above.
java.lang.String	getFormat() Returns the encoding format name, for this class always "RAW".

Methods inherited from class cryptix.provider.rsa.BaseRSAPrivateKey

getAlgorithm, getExponent, getInverseOfQModP, getModulus, getP, getQ, setRsaParams, setRsaParams, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.security.auth.Destroyable

destroy, isDestroyed

Constructor Detail

RawRSAPrivateKey

public RawRSAPrivateKey(java.math.BigInteger n,
                        java.math.BigInteger d)

Constructs a raw RSA private key given the private exponent, and the public modulus n. This should be used only when the factors of n are unknown.

Parameters:

d - the private exponent

n - the public modulus

RawRSAPrivateKey

public RawRSAPrivateKey(java.math.BigInteger d,
                        java.math.BigInteger p,
                        java.math.BigInteger q)

Constructs a raw RSA private key given the private exponent, and the two factors used to generate the public modulus n. The factors may be in any order.

Parameters:

d - the private exponent

p - the first factor of the public modulus

q - the second factor of the public modulus

RawRSAPrivateKey

public RawRSAPrivateKey(java.math.BigInteger d,
                        java.math.BigInteger p,
                        java.math.BigInteger q,
                        java.math.BigInteger u)

Constructs a raw RSA private key given the private exponent, and the two factors used to generate the public modulus n. The factors must be given in the correct order, such that u = q^-1 mod p.

Parameters:

d - the private exponent

p - the first factor of the public modulus

q - the second factor of the public modulus

u - the multiplicative inverse of q modulo p

RawRSAPrivateKey

public RawRSAPrivateKey(java.io.InputStream is)
                 throws java.io.IOException

Constructs a raw RSA private key from data read from an InputStream, encoded as described above.

Parameters:

is - the input stream from which data is parsed.

Throws:

java.io.IOException - if any I/O error occurs.

See Also:

getEncoded()

Method Detail

getFormat

public java.lang.String getFormat()

Returns the encoding format name, for this class always "RAW".

Returns:

the encoding format name for this key, "RAW".

getEncoded

public byte[] getEncoded()

Returns an encoding of the key as a byte array, as described above.

Returns:

the encoded byte array, or null if an error occurred.