org.bouncycastle.crypto.signers

Class ISO9796d2Signer

public class ISO9796d2Signer extends Object implements SignerWithRecovery

ISO9796-2 - mechanism using a hash function with recovery (scheme 1)

Field Summary
static int	TRAILER_IMPLICIT
static int	TRAILER_RIPEMD128
static int	TRAILER_RIPEMD160
static int	TRAILER_SHA1

Constructor Summary
	ISO9796d2Signer(AsymmetricBlockCipher cipher, Digest digest, boolean implicit) Generate a signer for the with either implicit or explicit trailers for ISO9796-2.
	ISO9796d2Signer(AsymmetricBlockCipher cipher, Digest digest) Constructor for a signer with an explicit digest trailer.

Method Summary
byte[]	generateSignature() generate a signature for the loaded message using the key we were initialised with.
byte[]	getRecoveredMessage() Return a reference to the recoveredMessage message.
boolean	hasFullMessage() Return true if the full message was recoveredMessage.
void	init(boolean forSigning, CipherParameters param)
void	reset() reset the internal state
void	update(byte b) update the internal digest with the byte b
void	update(byte[] in, int off, int len) update the internal digest with the byte array in
boolean	verifySignature(byte[] signature) return true if the signature represents a ISO9796-2 signature for the passed in message.

Field Detail

TRAILER_IMPLICIT

public static final int TRAILER_IMPLICIT

TRAILER_RIPEMD128

public static final int TRAILER_RIPEMD128

TRAILER_RIPEMD160

public static final int TRAILER_RIPEMD160

TRAILER_SHA1

public static final int TRAILER_SHA1

Constructor Detail

ISO9796d2Signer

public ISO9796d2Signer(AsymmetricBlockCipher cipher, Digest digest, boolean implicit)

Generate a signer for the with either implicit or explicit trailers for ISO9796-2.

Parameters: cipher base cipher to use for signature creation/verification digest digest to use. implicit whether or not the trailer is implicit or gives the hash.