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

Class DSAPublicKey

java.lang.Object

org.mozilla.jss.netscape.security.x509.X509Key

org.mozilla.jss.netscape.security.provider.DSAPublicKey

All Implemented Interfaces:

Serializable, DSAKey, DSAPublicKey, Key, PublicKey

public final class DSAPublicKey
extends X509Key
implements DSAPublicKey

An X.509 public key for the Digital Signature Algorithm.

Version:

1.52, 97/12/10

See Also:

• DSAPrivateKey
• AlgIdDSA
• Serialized Form

Field Summary

Fields

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

Fields inherited from class org.mozilla.jss.netscape.security.x509.X509Key

algid, encodedKey, key

Constructor Summary

Constructors

Constructor	Description
DSAPublicKey()
DSAPublicKey(byte[] encoded)	Make a DSA public key from its DER encoding (X.509).
DSAPublicKey(BigInteger y, BigInteger p, BigInteger q, BigInteger g)	Make a DSA public key out of a public key and three parameters.

Method Summary

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

Methods inherited from class org.mozilla.jss.netscape.security.x509.X509Key

decode, decode, encode, encode, getAlgorithm, getAlgorithmId, getEncoded, getFormat, getKey, parse, parsePublicKey

Methods inherited from class java.lang.Object

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

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

y

private BigInteger y

Constructor Details

DSAPublicKey

public DSAPublicKey()

DSAPublicKey

public DSAPublicKey(BigInteger y,
 BigInteger p,
 BigInteger q,
 BigInteger g)
             throws InvalidKeyException

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

Throws:

InvalidKeyException

DSAPublicKey

public DSAPublicKey(byte[] encoded)
             throws InvalidKeyException

Make a DSA public key from its DER encoding (X.509).

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

getY

public BigInteger getY()

Get the raw public value, y, without the parameters.

Specified by:

getY in interface DSAPublicKey

toString

public String toString()

Overrides:

toString in class X509Key

parseKeyBits

protected void parseKeyBits()
                     throws InvalidKeyException

Description copied from class: X509Key

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 X.509 SubjectPublicKeyInfo values using the X509Key member functions, such as parse and decode.

Overrides:

parseKeyBits in class X509Key

Throws:

InvalidKeyException - on invalid key encodings.

hashCode

public int hashCode()

Description copied from class: X509Key

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

Overrides:

hashCode in class X509Key

equals

public boolean equals(Object obj)

Overrides:

equals in class X509Key