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cryptix.openpgp.util
Class PGPDSAElGamalSignatureParser  

java.lang.Object
  cryptix.openpgp.util.PGPDSAElGamalSignatureParser

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public class PGPDSAElGamalSignatureParser

extends java.lang.Object

Reads and writes DER encoded DSA and ElGamal signatures.

DSA and ElGamal signatures are encoded by the JCA as a DER sequence of two ASN.1 INTEGER values like this:

SEQUENCE { r INTEGER; s INTEGER }

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Field Summary
private  java.math.BigInteger	r           Signature values r and s
private  java.math.BigInteger	s           Signature values r and s

 

Constructor Summary

PGPDSAElGamalSignatureParser(java.math.BigInteger r, java.math.BigInteger s)           Initializes the parser with the two numbers r and s.

PGPDSAElGamalSignatureParser(byte[] data)           Initializes the parser with a DER sequence.

 

Method Summary
byte[]	getData()           Returns the encoded DER sequence
java.math.BigInteger	getR()           Returns the decoded r
java.math.BigInteger	getS()           Returns the decoded s

 

Methods inherited from class java.lang.Object

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

 

Field Detail

r

private java.math.BigInteger r

Signature values r and s

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s

private java.math.BigInteger s

Signature values r and s

Constructor Detail

PGPDSAElGamalSignatureParser

public PGPDSAElGamalSignatureParser(byte[] data)
                             throws cryptix.openpgp.PGPDataFormatException

Initializes the parser with a DER sequence. Use getR() and getS() to get the decoded numbers.

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PGPDSAElGamalSignatureParser

public PGPDSAElGamalSignatureParser(java.math.BigInteger r,
                                    java.math.BigInteger s)

Initializes the parser with the two numbers r and s. Use getData() to get the encoded DER sequence.

Method Detail

getR

public java.math.BigInteger getR()

Returns the decoded r

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getS

public java.math.BigInteger getS()

Returns the decoded s

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getData

public byte[] getData()

Returns the encoded DER sequence

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