org.bouncycastle.crypto.signers

Class PlainDSAEncoding

java.lang.Object

org.bouncycastle.crypto.signers.PlainDSAEncoding

All Implemented Interfaces:

DSAEncoding

public class PlainDSAEncoding
extends Object
implements DSAEncoding

Field Summary

Fields

Modifier and Type	Field and Description
static PlainDSAEncoding	INSTANCE

Constructor Summary

Constructors

Constructor and Description
PlainDSAEncoding()

Method Summary

Modifier and Type	Method and Description
protected BigInteger	checkValue(BigInteger n, BigInteger x)
BigInteger[]	decode(BigInteger n, byte[] encoding) Decode the (r, s) pair of a DSA signature.
protected BigInteger	decodeValue(BigInteger n, byte[] buf, int off, int len)
byte[]	encode(BigInteger n, BigInteger r, BigInteger s) Encode the (r, s) pair of a DSA signature.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final PlainDSAEncoding INSTANCE

Constructor Detail

PlainDSAEncoding

public PlainDSAEncoding()

Method Detail

encode

public byte[] encode(BigInteger n,
                     BigInteger r,
                     BigInteger s)

Description copied from interface: DSAEncoding

Encode the (r, s) pair of a DSA signature.

Specified by:

encode in interface DSAEncoding

Parameters:

n - the order of the group that r, s belong to.

r - the r value of a DSA signature.

s - the s value of a DSA signature.

Returns:

an encoding of the DSA signature given by the provided (r, s) pair.

decode

public BigInteger[] decode(BigInteger n,
                           byte[] encoding)

Description copied from interface: DSAEncoding

Decode the (r, s) pair of a DSA signature.

Specified by:

decode in interface DSAEncoding

Parameters:

n - the order of the group that r, s belong to.

encoding - an encoding of the (r, s) pair of a DSA signature.

Returns:

the (r, s) of a DSA signature, stored in an array of exactly two elements, r followed by s.

checkValue

protected BigInteger checkValue(BigInteger n,
                                BigInteger x)

decodeValue

protected BigInteger decodeValue(BigInteger n,
                                 byte[] buf,
                                 int off,
                                 int len)