C# Class Org.BouncyCastle.Crypto.Signers.Iso9796d2PssSigner

ISO9796-2 - mechanism using a hash function with recovery (scheme 2 and 3).

Note: the usual length for the salt is the length of the hash function used in bytes.

Inheritance: ISignerWithRecovery

Public Methods

Method	Description
BlockUpdate ( byte input, int inOff, int length ) : void	update the internal digest with the byte array in
GenerateSignature ( ) : byte[]	Generate a signature for the loaded message using the key we were initialised with.
GetRecoveredMessage ( ) : byte[]	Return a reference to the recoveredMessage message.
HasFullMessage ( ) : bool	Return true if the full message was recoveredMessage.
Init ( bool forSigning, ICipherParameters parameters ) : void	Initialise the signer.
Iso9796d2PssSigner ( IAsymmetricBlockCipher cipher, IDigest digest, int saltLength ) : System	Constructor for a signer with an explicit digest trailer.
Iso9796d2PssSigner ( IAsymmetricBlockCipher cipher, IDigest digest, int saltLength, bool isImplicit ) : System	Generate a signer for the with either implicit or explicit trailers for ISO9796-2, scheme 2 or 3.
Reset ( ) : void	reset the internal state
Update ( byte input ) : void	update the internal digest with the byte b
VerifySignature ( byte signature ) : bool	return true if the signature represents a ISO9796-2 signature for the passed in message.

Method	Description
ClearBlock ( byte block ) : void	clear possible sensitive data
IsSameAs ( byte a, byte b ) : bool	compare two byte arrays.
ItoOSP ( int i, byte sp ) : void	int to octet string. int to octet string.
LtoOSP ( long l, byte sp ) : void	long to octet string.
MaskGeneratorFunction1 ( byte Z, int zOff, int zLen, int length ) : byte[]	mask generator function, as described in Pkcs1v2.

update the internal digest with the byte array in

public BlockUpdate ( byte input, int inOff, int length ) : void
input	byte
inOff	int
length	int
return	void

Generate a signature for the loaded message using the key we were initialised with.

public GenerateSignature ( ) : byte[]
return	byte[]

Return a reference to the recoveredMessage message.

public GetRecoveredMessage ( ) : byte[]
return	byte[]

Return true if the full message was recoveredMessage.

public HasFullMessage ( ) : bool
return	bool

Initialise the signer.

if wrong parameter type or a fixed /// salt is passed in which is the wrong length. ///

public Init ( bool forSigning, ICipherParameters parameters ) : void
forSigning	bool	true if for signing, false if for verification.
parameters	ICipherParameters	parameters for signature generation/verification. If the /// parameters are for generation they should be a ParametersWithRandom, /// a ParametersWithSalt, or just an RsaKeyParameters object. If RsaKeyParameters /// are passed in a SecureRandom will be created. ///
return	void

Constructor for a signer with an explicit digest trailer.

public Iso9796d2PssSigner ( IAsymmetricBlockCipher cipher, IDigest digest, int saltLength ) : System
cipher	IAsymmetricBlockCipher	cipher to use. ///
digest	IDigest	digest to sign with. ///
saltLength	int	length of salt in bytes. ///
return	System

Generate a signer for the with either implicit or explicit trailers for ISO9796-2, scheme 2 or 3.

public Iso9796d2PssSigner ( IAsymmetricBlockCipher cipher, IDigest digest, int saltLength, bool isImplicit ) : System
cipher	IAsymmetricBlockCipher	base cipher to use for signature creation/verification
digest	IDigest	digest to use.
saltLength	int	length of salt in bytes.
isImplicit	bool	whether or not the trailer is implicit or gives the hash.
return	System

reset the internal state

public Reset ( ) : void
return	void

update the internal digest with the byte b

public Update ( byte input ) : void
input	byte
return	void

return true if the signature represents a ISO9796-2 signature for the passed in message.

public VerifySignature ( byte signature ) : bool
signature	byte
return	bool