Package org.mozilla.jss.netscape.security.provider

Class DSAPrivateKey

java.lang.Object

org.mozilla.jss.netscape.security.pkcs.PKCS8Key

org.mozilla.jss.netscape.security.provider.DSAPrivateKey

All Implemented Interfaces:

Serializable, DSAKey, DSAPrivateKey, Key, PrivateKey, Destroyable

public final class DSAPrivateKey
extends PKCS8Key
implements DSAPrivateKey

A PKCS#8 private key for the Digital Signature Algorithm.

Version:

1.47, 97/12/10

See Also:

• DSAPublicKey
• AlgIdDSA
• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID	use serialVersionUID from JDK 1.1.
private BigInteger	x

Fields inherited from class org.mozilla.jss.netscape.security.pkcs.PKCS8Key

algid, encodedKey, key, VERSION

Constructor Summary

Constructors

Constructor	Description
DSAPrivateKey()
DSAPrivateKey(byte[] encoded)	Make a DSA private key from its DER encoding (PKCS #8).
DSAPrivateKey(BigInteger x, BigInteger p, BigInteger q, BigInteger g)	Make a DSA private key out of a private key and three parameters.

Method Summary

Modifier and Type	Method	Description
private void	clearOldKey()
boolean	equals(Object obj)	Compares two private keys.
DSAParams	getParams()	Returns the DSA parameters associated with this key, or null if the parameters could not be parsed.
BigInteger	getX()	Get the raw private key, x, without the parameters.
int	hashCode()	Calculates a hash code value for this object.
protected void	parseKeyBits()	Parse the key bits.
String	toString()

Methods inherited from class org.mozilla.jss.netscape.security.pkcs.PKCS8Key

buildPKCS8Key, decode, decode, encode, encode, getAlgorithm, getAlgorithmId, getEncoded, getFormat, parse

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.security.auth.Destroyable

destroy, isDestroyed

Methods inherited from interface java.security.Key

getAlgorithm, getEncoded, getFormat

Field Details

serialVersionUID

private static final long serialVersionUID

use serialVersionUID from JDK 1.1. for interoperability

See Also:

• Constant Field Values

x

private BigInteger x

Constructor Details

DSAPrivateKey

public DSAPrivateKey()

DSAPrivateKey

public DSAPrivateKey(BigInteger x,
 BigInteger p,
 BigInteger q,
 BigInteger g)
              throws InvalidKeyException

Make a DSA private key out of a private key and three parameters.

Throws:

InvalidKeyException

DSAPrivateKey

public DSAPrivateKey(byte[] encoded)
              throws InvalidKeyException

Make a DSA private key from its DER encoding (PKCS #8).

Throws:

InvalidKeyException

Method Details

getParams

public DSAParams getParams()

Returns the DSA parameters associated with this key, or null if the parameters could not be parsed.

Specified by:

getParams in interface DSAKey

getX

public BigInteger getX()

Get the raw private key, x, without the parameters.

Specified by:

getX in interface DSAPrivateKey

clearOldKey

private void clearOldKey()

toString

public String toString()

Overrides:

toString in class PKCS8Key

parseKeyBits

protected void parseKeyBits()
                     throws InvalidKeyException

Description copied from class: PKCS8Key

Parse the key bits. This may be redefined by subclasses to take advantage of structure within the key. For example, RSA public keys encapsulate two unsigned integers (modulus and exponent) as DER values within the key bits; Diffie-Hellman and DSS/DSA keys encapsulate a single unsigned integer.

This function is called when creating PKCS#8 SubjectPublicKeyInfo values using the PKCS8Key member functions, such as parse and decode.

Overrides:

parseKeyBits in class PKCS8Key

Throws:

InvalidKeyException - if the key encoding is invalid.

hashCode

public int hashCode()

Description copied from class: PKCS8Key

Calculates a hash code value for this object. Objects which are equal will also have the same hashcode.

Overrides:

hashCode in class PKCS8Key

equals

public boolean equals(Object obj)

Description copied from class: PKCS8Key

Compares two private keys. This returns false if the object with which to compare is not of type Key. Otherwise, the encoding of this key object is compared with the encoding of the given key object.

Overrides:

equals in class PKCS8Key

Parameters:

obj - the object with which to compare

Returns:

true if this key has the same encoding as the object argument; false otherwise.