Package org.bouncycastle.pqc.crypto.gmss

## Class GMSSSigner

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

- All Implemented Interfaces:
    `MessageSigner`

      public class GMSSSigner
      extends java.lang.Object
      implements MessageSigner

  This class implements the GMSS signature scheme.

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `GMSSSigner​(GMSSDigestProvider digest)` | The standard constructor tries to generate the MerkleTree Algorithm identifier with the corresponding OID.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `byte[]` | `generateSignature​(byte[] message)` | Signs a message.
    `void` | `init​(boolean forSigning, CipherParameters param)` | initialise the signer for signature generation or signature verification.
    `boolean` | `verifySignature​(byte[] message, byte[] signature)` | This function verifies the signature of the message that has been updated, with the aid of the public key.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### GMSSSigner

          public GMSSSigner​(GMSSDigestProvider digest)

      The standard constructor tries to generate the MerkleTree Algorithm identifier with the corresponding OID.
      Parameters:
        `digest` - the digest to use

  - ### 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)

      Signs a message.
      Specified by:
        `generateSignature` in interface `MessageSigner`
      Parameters:
        `message` - the message to be signed.
      Returns:
        the signature.

    - #### verifySignature

          public boolean verifySignature​(byte[] message,
                                         byte[] signature)

      This function verifies the signature of the message that has been updated, with the aid of the public key.
      Specified by:
        `verifySignature` in interface `MessageSigner`
      Parameters:
        `message` - the message
        `signature` - the signature associated with the message
      Returns:
        true if the signature has been verified, false otherwise.