org.bouncycastle.crypto.internal

public Interface DSA

Known Direct Implementers: org.bouncycastle.crypto.fips.DsaSigner, org.bouncycastle.crypto.fips.EcDsaSigner, org.bouncycastle.crypto.general.DsaSigner, org.bouncycastle.crypto.general.Gost3410Signer, org.bouncycastle.crypto.general.EcDsaSigner, org.bouncycastle.crypto.general.EcGost3410Signer, org.bouncycastle.crypto.general.DSTU4145Signer
Imports: java.math.BigInteger

interface for classes implementing algorithms modeled similar to the Digital Signature Alorithm.

Method Summary

Modifier and Type	Method and Description
public BigInteger[]	Returns: two big integers representing the r and s values respectively. generateSignature(byte[] the message to be signed. message) sign the passed in message (usually the output of a hash function).
public void	init(boolean true if we are generating a signature, false otherwise. forSigning, CipherParameters key parameters for signature generation. param) initialise the signer for signature generation or signature verification.
public boolean	verifySignature(byte[] the message that was supposed to have been signed. message, BigInteger the r signature value. r, BigInteger the s signature value. s) verify the message message against the signature values r and s.

generateSignature	back to summary
public BigInteger[] generateSignature(byte[] message) sign the passed in message (usually the output of a hash function). Parameters message:byte[] the message to be signed. Returns:BigInteger[] two big integers representing the r and s values respectively.

generateSignature

public BigInteger[] generateSignature(byte[] message)

sign the passed in message (usually the output of a hash function).

Parameters

two big integers representing the r and s values respectively.

init	back to summary
public void init(boolean forSigning, CipherParameters param) initialise the signer for signature generation or signature verification. Parameters forSigning:boolean true if we are generating a signature, false otherwise. param:CipherParameters key parameters for signature generation.

init

public void init(boolean forSigning, CipherParameters param)

initialise the signer for signature generation or signature verification.

Parameters

verifySignature	back to summary
public boolean verifySignature(byte[] message, BigInteger r, BigInteger s) verify the message message against the signature values r and s. Parameters message:byte[] the message that was supposed to have been signed. r:BigInteger the r signature value. s:BigInteger the s signature value.

verifySignature

public boolean verifySignature(byte[] message, BigInteger r, BigInteger s)

verify the message message against the signature values r and s.

Parameters