Signer (Bouncy Castle Library 1.68 API Specification)

All Known Subinterfaces:

SignerWithRecovery

All Known Implementing Classes:

DigestingMessageSigner, DigestingStateAwareMessageSigner, DSADigestSigner, Ed25519ctxSigner, Ed25519phSigner, Ed25519Signer, Ed448phSigner, Ed448Signer, GenericSigner, ISO9796d2PSSSigner, ISO9796d2Signer, PSSSigner, RSADigestSigner, SM2Signer, X931Signer
```
public interface Signer
```
Generic signer interface for hash based and message recovery signers.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`byte[]`	`generateSignature()`	generate a signature for the message we've been loaded with using the key we were initialised with.
`void`	`init(boolean forSigning, CipherParameters param)`	Initialise the signer for signing or verification.
`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 internal state represents the signature described in the passed in array.

- Method Detail
  - init
```
void init(boolean forSigning,
          CipherParameters param)
```
    Initialise the signer for signing or verification.
    
    Parameters:
    
    forSigning - true if for signing, false otherwise
    
    param - necessary parameters.
  - update
```
void update(byte b)
```
    update the internal digest with the byte b
  - update
```
void update(byte[] in,
            int off,
            int len)
```
    update the internal digest with the byte array in
  - generateSignature
```
byte[] generateSignature()
                  throws CryptoException,
                         DataLengthException
```
    generate a signature for the message we've been loaded with using the key we were initialised with.
    
    Throws:
    
    CryptoException
    
    DataLengthException
  - verifySignature
```
boolean verifySignature(byte[] signature)
```
    return true if the internal state represents the signature described in the passed in array.
  - reset
```
void reset()
```
    reset the internal state