OpenCard  
 
OCF, the OpenCard Framework is a standard Java framework for working with Smart Cards.  
 

opencard.opt.security
Class RSAPrivateKey

java.lang.Object
  |
  +--opencard.opt.security.RSAPrivateKey
public class RSAPrivateKey
extends java.lang.Object
implements java.security.PrivateKey

Contains an RSA private key. Implements interface java.security.PrivateKey. For an alternative class that allows signing via the chinese remainder's algorithm see RSACRTKey. In this package OpenCard provides key classes for common algorithms like RSA, DSA (or DES) that each concrete card service implementing a card service interface should support instead of defining its own key classes. Only for new PKA algorithms that OpenCard does not yet support a card service may define its own key classes.

Version:
$Id: RSAPrivateKey.java,v 1.2 1999/10/20 13:15:00 damke Exp $
See Also:
PrivateKey, RSACRTKey, Serialized Form

Field Summary
protected  java.math.BigInteger e_
          Exponent
protected  int inputLength_
          input data length
protected  int keyLength_
          Key length (in bits)
protected  java.math.BigInteger m_
          Modulus
protected  int outputLength_
          output data length
 
Constructor Summary
RSAPrivateKey(java.math.BigInteger e, java.math.BigInteger m)
          Produce an RSAPrivateKey from the given byte arrays.
RSAPrivateKey(byte[] m, byte[] e, int inputLength, int outputLength, int keyLength)
          Produce an RSAPrivateKey from the given byte arrays.
 
Method Summary
 java.lang.String getAlgorithm()
          Conformance to the java.security interface
 byte[] getEncoded()
          Conformance to the java.security interface
 java.lang.String getFormat()
          Conformance to the java.security interface
 int getInputLength()
          Returns the number of bytes to be input into a signing operation with this key.
 int maxOutputLength()
          Returns the number of bytes to be generated by a signing operation with this key.
 java.math.BigInteger modulus()
          Return modulus of this key.
 java.math.BigInteger privateExponent()
          Return Private exponent.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

m_

protected java.math.BigInteger m_
Modulus

e_

protected java.math.BigInteger e_
Exponent

inputLength_

protected int inputLength_
input data length

outputLength_

protected int outputLength_
output data length

keyLength_

protected int keyLength_
Key length (in bits)
Constructor Detail

RSAPrivateKey

public RSAPrivateKey(byte[] m,
                     byte[] e,
                     int inputLength,
                     int outputLength,
                     int keyLength)
Produce an RSAPrivateKey from the given byte arrays.

Parameters:
m - Modulus
e - private exponent
inputLength - Number of bytes accepted for input to signature routine.
outputLength - Number of bytes produced by signature routine.
keyLength - The nominal size of the key in bits.

RSAPrivateKey

public RSAPrivateKey(java.math.BigInteger e,
                     java.math.BigInteger m)
Produce an RSAPrivateKey from the given byte arrays.

Parameters:
m - Modulus
e - private exponent
Method Detail

getAlgorithm

public java.lang.String getAlgorithm()
Conformance to the java.security interface
See Also:
PrivateKey

getEncoded

public byte[] getEncoded()
Conformance to the java.security interface
See Also:
PrivateKey

getFormat

public java.lang.String getFormat()
Conformance to the java.security interface
See Also:
PrivateKey

getInputLength

public int getInputLength()
Returns the number of bytes to be input into a signing operation with this key.

Returns:
Input data length.

maxOutputLength

public int maxOutputLength()
Returns the number of bytes to be generated by a signing operation with this key.

Returns:
Output data length.

modulus

public java.math.BigInteger modulus()
Return modulus of this key.

Returns:
Modulus of this key

privateExponent

public java.math.BigInteger privateExponent()
Return Private exponent.

Returns:
Private exponent of this key