GMSSStateAwareSigner (Bouncy Castle Library 1.60 API Specification)

java.lang.Object
- org.bouncycastle.pqc.crypto.gmss.GMSSStateAwareSigner

All Implemented Interfaces:

MessageSigner, StateAwareMessageSigner
```
public class GMSSStateAwareSigner
extends java.lang.Object
implements StateAwareMessageSigner
```
This class implements the GMSS signature scheme, but allows multiple signatures to be generated.
Note: getUpdatedPrivateKey() needs to be called to fetch the current value of the usable private key.

Constructor Summary

Constructors
Constructor Description

GMSSStateAwareSigner(Digest digest)

Constructors
Constructor	Description
`GMSSStateAwareSigner(Digest digest)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`byte[]`	`generateSignature(byte[] message)`	sign the passed in message (usually the output of a hash function).
`AsymmetricKeyParameter`	`getUpdatedPrivateKey()`	Return the current version of the private key with the updated state.
`void`	`init(boolean forSigning, CipherParameters param)`	initialise the signer for signature generation or signature verification.
`boolean`	`verifySignature(byte[] message, byte[] signature)`	verify the message message against the signature value.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - GMSSStateAwareSigner
```
public GMSSStateAwareSigner(Digest digest)
```
- Method Detail
  - init
```
public void init(boolean forSigning,
                 CipherParameters param)
```
    Description copied from interface: MessageSigner
    
    initialise the signer for signature generation or signature verification.
    
    Specified by:
    
    init in interface MessageSigner
    
    Parameters:
    
    forSigning - true if we are generating a signature, false otherwise.
    
    param - key parameters for signature generation.
  - generateSignature
```
public byte[] generateSignature(byte[] message)
```
    Description copied from interface: MessageSigner
    
    sign the passed in message (usually the output of a hash function).
    
    Specified by:
    
    generateSignature in interface MessageSigner
    
    Parameters:
    
    message - the message to be signed.
    
    Returns:
    
    the signature of the message
  - verifySignature
```
public boolean verifySignature(byte[] message,
                               byte[] signature)
```
    Description copied from interface: MessageSigner
    
    verify the message message against the signature value.
    
    Specified by:
    
    verifySignature in interface MessageSigner
    
    Parameters:
    
    message - the message that was supposed to have been signed.
    
    signature - the signature of the message
  - getUpdatedPrivateKey
```
public AsymmetricKeyParameter getUpdatedPrivateKey()
```
    Description copied from interface: StateAwareMessageSigner
    
    Return the current version of the private key with the updated state.
    Note: calling this method will effectively disable the Signer from being used for further signature generation without another call to init().
    
    Specified by:
    
    getUpdatedPrivateKey in interface StateAwareMessageSigner
    
    Returns:
    
    an updated private key object, which can be used for later signature generation.

Class GMSSStateAwareSigner

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

GMSSStateAwareSigner

Method Detail

init

generateSignature

verifySignature

getUpdatedPrivateKey